Qt port.

apu/apu.h

@@ -41,7 +41,7 @@ void S9xLandSamples (void);
 void S9xClearSamples (void);
 bool8 S9xMixSamples (uint8 *, int);
 void S9xSetSamplesAvailableCallback (apu_callback, void *);
-void S9xUpdateDynamicRate (int, int);
+void S9xUpdateDynamicRate (int empty = 1, int buffer_size = 2);
 
 #define DSP_INTERPOLATION_NONE     0
 #define DSP_INTERPOLATION_LINEAR   1

common/audio/s9x_sound_driver_cubeb.cpp

@@ -0,0 +1,118 @@
+/*****************************************************************************\
+     Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
+                This file is licensed under the Snes9x License.
+   For further information, consult the LICENSE file in the root directory.
+\*****************************************************************************/
+
+#include "s9x_sound_driver_cubeb.hpp"
+#include <cstdio>
+
+void S9xCubebSoundDriver::write_samples(int16_t *data, int samples)
+{
+    if (samples > buffer.space_empty())
+        samples = buffer.space_empty();
+    buffer.push(data, samples);
+}
+
+S9xCubebSoundDriver::S9xCubebSoundDriver()
+{
+}
+
+S9xCubebSoundDriver::~S9xCubebSoundDriver()
+{
+    deinit();
+}
+
+void S9xCubebSoundDriver::init()
+{
+    if (!context)
+        cubeb_init(&context, "Snes9x", nullptr);
+    stop();
+}
+
+void S9xCubebSoundDriver::deinit()
+{
+    stop();
+    if (stream)
+    {
+        cubeb_stream_destroy(stream);
+        stream = nullptr;
+    }
+
+    if (context)
+    {
+        cubeb_destroy(context);
+        context = nullptr;
+    }
+}
+
+void S9xCubebSoundDriver::start()
+{
+    if (stream)
+        cubeb_stream_start(stream);
+}
+
+void S9xCubebSoundDriver::stop()
+{
+    if (stream)
+        cubeb_stream_stop(stream);
+}
+
+void state_callback(cubeb_stream *stream, void *user_ptr, cubeb_state state)
+{
+}
+
+long data_callback(cubeb_stream *stream, void *user_ptr,
+                   void const *input_buffer,
+                   void *output_buffer, long nframes)
+{
+    return ((S9xCubebSoundDriver *)user_ptr)->data_callback(stream, input_buffer, output_buffer, nframes);
+}
+
+long S9xCubebSoundDriver::data_callback(cubeb_stream *stream, void const *input_buffer, void *output_buffer, long nframes)
+{
+    buffer.read((int16_t *)output_buffer, nframes * 2);
+    return nframes;
+}
+
+bool S9xCubebSoundDriver::open_device(int playback_rate, int buffer_size)
+{
+    cubeb_stream_params params{};
+    params.channels = 2;
+    params.format = CUBEB_SAMPLE_S16LE;
+    params.layout = CUBEB_LAYOUT_UNDEFINED;
+    params.rate = playback_rate;
+    params.prefs = CUBEB_STREAM_PREF_NONE;
+
+    uint32_t min_latency;
+    cubeb_get_min_latency(context, &params, &min_latency);
+
+    auto retval = cubeb_stream_init(context, &stream, "Snes9x",
+                                    nullptr, nullptr,
+                                    nullptr, &params,
+                                    min_latency,
+                                    &::data_callback,
+                                    &state_callback,
+                                    this);
+
+    if (retval != CUBEB_OK)
+    {
+        printf("Failed to start stream. Error: %d!\n", retval);
+        stream = nullptr;
+        return false;
+    }
+
+    buffer.resize(2 * buffer_size * playback_rate / 1000);
+
+    return true;
+}
+
+int S9xCubebSoundDriver::space_free()
+{
+    return buffer.space_empty();
+}
+
+std::pair<int, int> S9xCubebSoundDriver::buffer_level()
+{
+    return { buffer.space_empty(), buffer.buffer_size };
+}

common/audio/s9x_sound_driver_cubeb.hpp

@@ -0,0 +1,36 @@
+/*****************************************************************************\
+     Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
+                This file is licensed under the Snes9x License.
+   For further information, consult the LICENSE file in the root directory.
+\*****************************************************************************/
+
+#ifndef __S9X_SOUND_DRIVER_CUBEB_HPP
+#define __S9X_SOUND_DRIVER_CUBEB_HPP
+
+#include "s9x_sound_driver.hpp"
+#include <cstdint>
+#include "cubeb/cubeb.h"
+#include "../../apu/resampler.h"
+
+class S9xCubebSoundDriver : public S9xSoundDriver
+{
+  public:
+    S9xCubebSoundDriver();
+    ~S9xCubebSoundDriver();
+    void init() override;
+    void deinit() override;
+    bool open_device(int playback_rate, int buffer_size) override;
+    void start() override;
+    void stop() override;
+    long data_callback(cubeb_stream *stream, void const *input_buffer, void *output_buffer, long nframes);
+    void write_samples(int16_t *data, int samples) override;
+    int space_free() override;
+    std::pair<int, int> buffer_level() override;
+
+  private:
+    Resampler buffer;
+    cubeb *context = nullptr;
+    cubeb_stream *stream = nullptr;
+};
+
+#endif /* __S9X_SOUND_DRIVER_SDL_HPP */

common/audio/s9x_sound_driver_portaudio.cpp

@@ -15,6 +15,11 @@ S9xPortAudioSoundDriver::S9xPortAudioSoundDriver()
     audio_stream = NULL;
 }
 
+S9xPortAudioSoundDriver::~S9xPortAudioSoundDriver()
+{
+    deinit();
+}
+
 void S9xPortAudioSoundDriver::init()
 {
     PaError err;
@@ -60,9 +65,64 @@ void S9xPortAudioSoundDriver::stop()
     }
 }
 
+bool S9xPortAudioSoundDriver::tryHostAPI(int index)
+{
+    auto hostapi_info = Pa_GetHostApiInfo(index);
+    if (!hostapi_info)
+    {
+        printf("Host API #%d has no info\n", index);
+        return false;
+    }
+    printf("Attempting API: %s\n", hostapi_info->name);
+
+    auto device_info = Pa_GetDeviceInfo(hostapi_info->defaultOutputDevice);
+    if (!device_info)
+    {
+        printf("(%s)...No device info available.\n", hostapi_info->name);
+        return false;
+    }
+
+    PaStreamParameters param{};
+    param.device = hostapi_info->defaultOutputDevice;
+    param.suggestedLatency = buffer_size_ms * 0.001;
+    param.channelCount = 2;
+    param.sampleFormat = paInt16;
+    param.hostApiSpecificStreamInfo = NULL;
+
+    printf("(%s : %s, latency %dms)...\n",
+           hostapi_info->name,
+           device_info->name,
+           (int)(param.suggestedLatency * 1000.0));
+
+    auto err = Pa_OpenStream(&audio_stream,
+                             NULL,
+                             &param,
+                             playback_rate,
+                             0,
+                             paNoFlag,
+                             NULL,
+                             NULL);
+
+    int frames = playback_rate * buffer_size_ms / 1000;
+    //int frames = Pa_GetStreamWriteAvailable(audio_stream);
+    printf("PortAudio set buffer size to %d frames.\n", frames);
+    output_buffer_size = frames;
+
+    if (err == paNoError)
+    {
+        printf("OK\n");
+        return true;
+    }
+    else
+    {
+        printf("Failed (%s)\n", Pa_GetErrorText(err));
+        return false;
+    }
+}
+
 bool S9xPortAudioSoundDriver::open_device(int playback_rate, int buffer_size_ms)
 {
-    PaStreamParameters param;
+    
     const PaDeviceInfo *device_info;
     const PaHostApiInfo *hostapi_info;
     PaError err = paNoError;
@@ -74,84 +134,31 @@ bool S9xPortAudioSoundDriver::open_device(int playback_rate, int buffer_size_ms)
 
         if (err != paNoError)
         {
-            fprintf(stderr,
+            fprintf(stderr, "Couldn't reset audio stream.\nError: %s\n", Pa_GetErrorText(err));
-                    "Couldn't reset audio stream.\nError: %s\n",
-                    Pa_GetErrorText(err));
             return true;
         }
 
         audio_stream = NULL;
     }
 
-    param.channelCount = 2;
+    this->playback_rate = playback_rate;
-    param.sampleFormat = paInt16;
+    this->buffer_size_ms = buffer_size_ms;
-    param.hostApiSpecificStreamInfo = NULL;
 
     printf("PortAudio sound driver initializing...\n");
 
+    int host = 2; //Pa_GetDefaultHostApi();
+    if (tryHostAPI(host))
+        return true;
+
     for (int i = 0; i < Pa_GetHostApiCount(); i++)
     {
-        printf("    --> ");
+        if (Pa_GetDefaultHostApi() != i)
-
+        if (tryHostAPI(i))
-        hostapi_info = Pa_GetHostApiInfo(i);
-        if (!hostapi_info)
-        {
-            printf("Host API #%d has no info\n", i);
-            err = paNotInitialized;
-            continue;
-        }
-
-        device_info = Pa_GetDeviceInfo(hostapi_info->defaultOutputDevice);
-        if (!device_info)
-        {
-            printf("(%s)...No device info available.\n", hostapi_info->name);
-            err = paNotInitialized;
-            continue;
-        }
-
-        param.device = hostapi_info->defaultOutputDevice;
-        param.suggestedLatency = buffer_size_ms * 0.001;
-
-        printf("(%s : %s, latency %dms)...\n",
-               hostapi_info->name,
-               device_info->name,
-               (int)(param.suggestedLatency * 1000.0));
-
-        fflush(stdout);
-
-        err = Pa_OpenStream(&audio_stream,
-                            NULL,
-                            &param,
-                            playback_rate,
-                            0,
-                            paNoFlag,
-                            NULL,
-                            NULL);
-
-        int frames = Pa_GetStreamWriteAvailable(audio_stream);
-        printf ("PortAudio set buffer size to %d frames.\n", frames);
-        output_buffer_size = frames;
-
-        if (err == paNoError)
-        {
-            printf("OK\n");
-            break;
-        }
-        else
-        {
-            printf("Failed (%s)\n",
-                   Pa_GetErrorText(err));
-        }
-    }
-
-    if (err != paNoError || Pa_GetHostApiCount() < 1)
-    {
-        fprintf(stderr,
-                "Couldn't initialize sound\n");
-        return false;
-    }
-
             return true;
+    }
+
+    fprintf(stderr, "Couldn't initialize sound\n");
+    return false;
 }
 
 int S9xPortAudioSoundDriver::space_free()

common/audio/s9x_sound_driver_portaudio.hpp

@@ -16,6 +16,7 @@ class S9xPortAudioSoundDriver : public S9xSoundDriver
 {
   public:
     S9xPortAudioSoundDriver();
+    ~S9xPortAudioSoundDriver();
     void init() override;
     void deinit() override;
     bool open_device(int playback_rate, int buffer_size) override;
@@ -25,9 +26,12 @@ class S9xPortAudioSoundDriver : public S9xSoundDriver
     int space_free() override;
     std::pair<int, int> buffer_level() override;
     void samples_available();
+    bool tryHostAPI(int index);
 
   private:
     PaStream *audio_stream;
+    int playback_rate;
+    int buffer_size_ms;
     int output_buffer_size;
 };
 

common/audio/s9x_sound_driver_sdl.cpp

@@ -28,6 +28,11 @@ S9xSDLSoundDriver::S9xSDLSoundDriver()
 {
 }
 
+S9xSDLSoundDriver::~S9xSDLSoundDriver()
+{
+    deinit();
+}
+
 void S9xSDLSoundDriver::init()
 {
     SDL_InitSubSystem(SDL_INIT_AUDIO);

common/audio/s9x_sound_driver_sdl.hpp

@@ -22,6 +22,7 @@ class S9xSDLSoundDriver : public S9xSoundDriver
 {
   public:
     S9xSDLSoundDriver();
+    ~S9xSDLSoundDriver();
     void init() override;
     void deinit() override;
     bool open_device(int playback_rate, int buffer_size) override;

common/video/glx_context.cpp

@@ -94,6 +94,8 @@ bool GTKGLXContext::create_context()
         return false;
     }
 
+    resize();
+
     return true;
 }
 

common/video/wayland_egl_context.cpp

@@ -47,6 +47,7 @@ bool WaylandEGLContext::create_context()
         EGL_RED_SIZE, 8,
         EGL_BLUE_SIZE, 8,
         EGL_GREEN_SIZE, 8,
+        EGL_ALPHA_SIZE, 0,
         EGL_NONE
     };
 

common/video/wayland_surface.cpp

@@ -158,6 +158,7 @@ void WaylandSurface::resize(Metrics m)
 {
     metrics = m;
     auto [w, h] = get_size();
+
     wl_subsurface_set_position(subsurface, m.x, m.y);
 
     if (!viewport)

common/video/wgl_context.cpp

@@ -0,0 +1,105 @@
+/*****************************************************************************\
+     Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
+                This file is licensed under the Snes9x License.
+   For further information, consult the LICENSE file in the root directory.
+\*****************************************************************************/
+
+#include <cstdlib>
+#include <cstdio>
+
+#include "wgl_context.hpp"
+
+WGLContext::WGLContext()
+{
+    hwnd = nullptr;
+    hdc = nullptr;
+    hglrc = nullptr;
+    version_major = -1;
+    version_minor = -1;
+}
+
+WGLContext::~WGLContext()
+{
+    deinit();
+}
+
+void WGLContext::deinit()
+{
+    if (wglMakeCurrent)
+        wglMakeCurrent(nullptr, nullptr);
+    if (hglrc)
+        wglDeleteContext(hglrc);
+    if (hdc)
+        ReleaseDC(hwnd, hdc);
+}
+
+bool WGLContext::attach(HWND target)
+{
+    hwnd = target;
+    hdc  = GetDC(hwnd);
+
+    PIXELFORMATDESCRIPTOR pfd{};
+    pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
+    pfd.nVersion = 1;
+    pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
+    pfd.iPixelType = PFD_TYPE_RGBA;
+    pfd.cColorBits = 32;
+    pfd.cDepthBits = 16;
+    pfd.iLayerType = PFD_MAIN_PLANE;
+
+    auto pfdIndex = ChoosePixelFormat(hdc, &pfd);
+    if (!pfdIndex)
+        return false;
+
+    if (!SetPixelFormat(hdc, pfdIndex, &pfd))
+    {
+        // Shouldn't happen
+    }
+
+    return true;
+}
+
+bool WGLContext::create_context()
+{
+    hglrc = wglCreateContext(hdc);
+    if (!hglrc)
+        return false;
+
+    if (!wglMakeCurrent(hdc, hglrc))
+        return false;
+
+    gladLoaderLoadWGL(hdc);
+
+    resize();
+
+    return true;
+}
+
+void WGLContext::resize()
+{
+    RECT rect;
+    GetClientRect(hwnd, &rect);
+    this->width = rect.right - rect.left;
+    this->height = rect.bottom - rect.top;
+    make_current();
+}
+
+void WGLContext::swap_buffers()
+{
+    SwapBuffers(hdc);
+}
+
+bool WGLContext::ready()
+{
+    return true;
+}
+
+void WGLContext::make_current()
+{
+    wglMakeCurrent(hdc, hglrc);
+}
+
+void WGLContext::swap_interval(int frames)
+{
+    wglSwapIntervalEXT(frames);
+}

common/video/wgl_context.hpp

@@ -0,0 +1,36 @@
+/*****************************************************************************\
+     Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
+                This file is licensed under the Snes9x License.
+   For further information, consult the LICENSE file in the root directory.
+\*****************************************************************************/
+
+#ifndef __WGL_CONTEXT_HPP
+#define __WGL_CONTEXT_HPP
+
+#include "opengl_context.hpp"
+
+#include <glad/wgl.h>
+
+class WGLContext : public OpenGLContext
+{
+  public:
+    WGLContext();
+    ~WGLContext();
+    bool attach(HWND xid);
+    bool create_context() override;
+    void resize() override;
+    void swap_buffers() override;
+    void swap_interval(int frames) override;
+    void make_current() override;
+    bool ready();
+    void deinit();
+
+    HWND hwnd;
+    HDC hdc;
+    HGLRC hglrc;
+
+    int version_major;
+    int version_minor;
+};
+
+#endif

external/VulkanMemoryAllocator-Hpp/include/vk_mem_alloc.hpp

@@ -2,7 +2,7 @@
 #define VULKAN_MEMORY_ALLOCATOR_HPP
 
 #if !defined(AMD_VULKAN_MEMORY_ALLOCATOR_H)
-#include <vk_mem_alloc.h>
+#include "vk_mem_alloc.h"
 #endif
 
 #include <vulkan/vulkan.hpp>

gtk/CMakeLists.txt

@@ -40,7 +40,7 @@ add_compile_definitions(HAVE_LIBPNG
                         SNES9XLOCALEDIR=\"${LOCALEDIR}\")
 set(INCLUDES ../apu/bapu ../ src)
 set(SOURCES)
-set(ARGS -Wall -Wno-unused-parameter)
+set(ARGS -Wall -Wno-unused-parameter -Wno-unused-variable -Wno-nullability-completeness)
 set(LIBS)
 set(DEFINES)
 

memmap.h

@@ -14,6 +14,7 @@
 
 #include <string>
 #include <vector>
+#include <cstdint>
 
 struct CMemory
 {

port.h

@@ -32,7 +32,6 @@
 #define RIGHTSHIFT_int16_IS_SAR
 #define RIGHTSHIFT_int32_IS_SAR
 #ifndef __LIBRETRO__
-#define SNES_JOY_READ_CALLBACKS
 #endif //__LIBRETRO__
 #endif
 

qt/CMakeLists.txt

@@ -0,0 +1,259 @@
+cmake_minimum_required(VERSION 3.20)
+project(snes9x-qt VERSION 1.61)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_GLOBAL_AUTOGEN_TARGET ON)
+
+set(DEFINES SNES9X_QT)
+set(SNES9X_CORE_SOURCES
+    ../fxinst.cpp
+    ../fxemu.cpp
+    ../fxdbg.cpp
+    ../c4.cpp
+    ../c4emu.cpp
+    ../apu/apu.cpp
+    ../apu/bapu/dsp/sdsp.cpp
+    ../apu/bapu/smp/smp.cpp
+    ../apu/bapu/smp/smp_state.cpp
+    ../msu1.cpp
+    ../msu1.h
+    ../dsp.cpp
+    ../dsp1.cpp
+    ../dsp2.cpp
+    ../dsp3.cpp
+    ../dsp4.cpp
+    ../spc7110.cpp
+    ../obc1.cpp
+    ../seta.cpp
+    ../seta010.cpp
+    ../seta011.cpp
+    ../seta018.cpp
+    ../controls.cpp
+    ../crosshairs.cpp
+    ../cpu.cpp
+    ../sa1.cpp
+    ../debug.cpp
+    ../sdd1.cpp
+    ../tile.cpp
+    ../tileimpl-n1x1.cpp
+    ../tileimpl-n2x1.cpp
+    ../tileimpl-h2x1.cpp
+    ../srtc.cpp
+    ../gfx.cpp
+    ../memmap.cpp
+    ../clip.cpp
+    ../ppu.cpp
+    ../dma.cpp
+    ../snes9x.cpp
+    ../globals.cpp
+    ../stream.cpp
+    ../conffile.cpp
+    ../bsx.cpp
+    ../snapshot.cpp
+    ../screenshot.cpp
+    ../movie.cpp
+    ../statemanager.cpp
+    ../sha256.cpp
+    ../bml.cpp
+    ../cpuops.cpp
+    ../cpuexec.cpp
+    ../sa1cpu.cpp
+    ../cheats.cpp
+    ../cheats2.cpp
+    ../sdd1emu.cpp
+    ../netplay.cpp
+    ../server.cpp
+    ../loadzip.cpp
+    ../fscompat.cpp)
+add_library(snes9x-core ${SNES9X_CORE_SOURCES})
+target_include_directories(snes9x-core PRIVATE ../)
+target_compile_definitions(snes9x-core PRIVATE ZLIB HAVE_STDINT_H ALLOW_CPU_OVERCLOCK)
+
+find_package(Qt6 REQUIRED COMPONENTS Widgets Gui)
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(SDL REQUIRED sdl2)
+pkg_check_modules(ZLIB REQUIRED zlib)
+pkg_check_modules(PORTAUDIO REQUIRED portaudio-2.0)
+
+list(APPEND LIBS Qt6::Widgets Qt6::Gui ${SDL_LIBRARIES} ${ZLIB_LIBRARIES} ${PORTAUDIO_LIBRARIES})
+list(APPEND INCLUDES ${SDL_INCLUDE_DIRS} ${ZLIB_INCLUDE_DIRS} ${PORTAUDIO_INCLUDE_DIRS} ${Qt6Gui_PRIVATE_INCLUDE_DIRS})
+list(APPEND FLAGS ${SDL_COMPILE_FLAGS} ${ZLIB_COMPILE_FLAGS} ${PORTAUDIO_COMPILE_FLAGS})
+
+set(QT_GUI_SOURCES
+    src/main.cpp
+    src/EmuApplication.cpp
+    src/EmuMainWindow.cpp
+    src/Snes9xController.cpp
+    src/EmuSettingsWindow.cpp
+    src/EmuConfig.cpp
+    src/EmuInputPanel.cpp
+    src/EmuBinding.cpp
+    src/EmuCanvas.cpp
+    src/BindingPanel.cpp
+    src/ControllerPanel.cpp
+    src/DisplayPanel.cpp
+    src/SoundPanel.cpp
+    src/EmulationPanel.cpp
+    src/ShortcutsPanel.cpp
+    src/GeneralPanel.cpp
+    src/FoldersPanel.cpp
+    src/SDLInputManager.cpp
+    src/ShaderParametersDialog.cpp
+    src/SoftwareScalers.cpp
+    src/EmuCanvasQt.cpp
+    src/EmuCanvasOpenGL.cpp
+    src/EmuCanvasVulkan.cpp
+    ../external/glad/src/gl.c
+    ../common/audio/s9x_sound_driver_sdl.cpp
+    ../common/audio/s9x_sound_driver_sdl.hpp
+    ../common/audio/s9x_sound_driver_portaudio.cpp
+    ../common/audio/s9x_sound_driver_portaudio.hpp
+    ../common/audio/s9x_sound_driver_cubeb.cpp
+    ../common/audio/s9x_sound_driver_cubeb.hpp
+    ../filter/2xsai.cpp
+    ../filter/2xsai.h
+    ../filter/epx.cpp
+    ../filter/epx.h
+    ../filter/snes_ntsc_config.h
+    ../filter/snes_ntsc.h
+    ../filter/snes_ntsc_impl.h
+    ../filter/snes_ntsc.c)
+
+if(NOT ${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
+    pkg_check_modules(WAYLAND REQUIRED wayland-client wayland-egl)
+
+    include(FindX11)
+    if(NOT X11_FOUND)
+        error()
+    endif()
+
+    list(APPEND INCLUDES ${WAYLAND_INCLUDE_DIRS} ${X11_INCLUDE_DIRS})
+    list(APPEND LIBS ${WAYLAND_LIBRARIES} ${X11_LIBRARIES})
+    list(APPEND FLAGS ${WAYLAND_CFLAGS})
+
+    set(PLATFORM_SOURCES
+        ../common/video/glx_context.cpp
+        ../common/video/wayland_egl_context.cpp
+        ../common/video/wayland_surface.cpp
+        ../common/video/fractional-scale-v1.c
+        ../common/video/viewporter-client-protocol.c
+        ../common/video/wayland-idle-inhibit-unstable-v1.c
+        ../external/glad/src/glx.c
+        ../external/glad/src/egl.c)
+else()
+    set(PLATFORM_SOURCES
+        ../common/video/wgl_context.cpp
+        ../external/glad/src/wgl.c)
+    list(APPEND LIBS opengl32)
+endif()
+
+set(QT_UI_FILES
+    src/GeneralPanel.ui
+    src/ControllerPanel.ui
+    src/EmuSettingsWindow.ui
+    src/DisplayPanel.ui
+    src/SoundPanel.ui
+    src/EmulationPanel.ui
+    src/ShortcutsPanel.ui
+    src/FoldersPanel.ui)
+
+set(USE_SANITIZERS CACHE BOOL OFF)
+set(BUILD_TESTS CACHE BOOL OFF)
+set(BUILD_TOOLS CACHE BOOL OFF)
+add_subdirectory("../external/cubeb" "cubeb" EXCLUDE_FROM_ALL)
+list(APPEND LIBS cubeb)
+list(APPEND INCLUDES "../external/cubeb/include")
+
+set(BUILD_TESTING CACHE BOOL OFF)
+add_subdirectory("../external/glslang" "glslang" EXCLUDE_FROM_ALL)
+list(APPEND LIBS
+    glslang
+    OGLCompiler
+    HLSL
+    OSDependent
+    SPIRV
+    glslang-default-resource-limits)
+list(APPEND INCLUDES "../external/glslang")
+
+set(SPIRV_CROSS_EXCEPTIONS_TO_ASSERTIONS CACHE BOOL ON)
+add_subdirectory("../external/SPIRV-Cross" "SPIRV-Cross" EXCLUDE_FROM_ALL)
+list(APPEND LIBS
+    spirv-cross-core
+    spirv-cross-glsl
+    spirv-cross-reflect
+    spirv-cross-cpp)
+
+if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
+    list(APPEND DEFINES "VK_USE_PLATFORM_WIN32_KHR")
+else()
+    list(APPEND DEFINES
+        "VK_USE_PLATFORM_XLIB_KHR"
+        "VK_USE_PLATFORM_WAYLAND_KHR")
+endif()
+
+list(APPEND DEFINES
+    "VULKAN_HPP_DISPATCH_LOADER_DYNAMIC=1"
+    "VMA_DYNAMIC_VULKAN_FUNCTIONS=1"
+    "VMA_STATIC_VULKAN_FUNCTIONS=0"
+    "USE_SLANG")
+list(APPEND INCLUDES
+    ../external/vulkan-headers/include
+    ../external/VulkanMemoryAllocator-Hpp/include
+    ../external/stb
+    "../external/glad/include")
+list(APPEND SOURCES
+    ../vulkan/slang_shader.cpp
+    ../vulkan/slang_shader.hpp
+    ../vulkan/slang_preset.cpp
+    ../vulkan/slang_preset.hpp
+    ../vulkan/vulkan_hpp_storage.cpp
+    ../vulkan/vk_mem_alloc_implementation.cpp
+    ../vulkan/vulkan_context.cpp
+    ../vulkan/vulkan_context.hpp
+    ../vulkan/vulkan_texture.cpp
+    ../vulkan/vulkan_texture.hpp
+    ../vulkan/vulkan_swapchain.cpp
+    ../vulkan/vulkan_swapchain.hpp
+    ../vulkan/vulkan_slang_pipeline.cpp
+    ../vulkan/vulkan_slang_pipeline.hpp
+    ../vulkan/vulkan_pipeline_image.cpp
+    ../vulkan/vulkan_pipeline_image.hpp
+    ../vulkan/vulkan_shader_chain.cpp
+    ../vulkan/vulkan_shader_chain.hpp
+    ../vulkan/vulkan_simple_output.hpp
+    ../vulkan/vulkan_simple_output.cpp
+    ../vulkan/std_chrono_throttle.cpp
+    ../vulkan/std_chrono_throttle.hpp
+    ../vulkan/slang_helpers.cpp
+    ../vulkan/slang_helpers.hpp
+    ../vulkan/slang_preset_ini.cpp
+    ../vulkan/slang_preset_ini.hpp
+    ../external/stb/stb_image_implementation.cpp
+    ../shaders/glsl.cpp
+    ../shaders/slang.cpp
+    ../shaders/shader_helpers.cpp)
+
+list(APPEND DEFINES "IMGUI_IMPL_VULKAN_NO_PROTOTYPES")
+list(APPEND SOURCES ../external/imgui/imgui.cpp
+    ../external/imgui/imgui_demo.cpp
+    ../external/imgui/imgui_draw.cpp
+    ../external/imgui/imgui_tables.cpp
+    ../external/imgui/imgui_widgets.cpp
+    ../external/imgui/imgui_impl_opengl3.cpp
+    ../external/imgui/imgui_impl_vulkan.cpp
+    ../external/imgui/snes9x_imgui.cpp)
+list(APPEND INCLUDES ../external/imgui)
+
+add_executable(snes9x-qt ${QT_GUI_SOURCES} ${SOURCES} ${PLATFORM_SOURCES} src/resources/snes9x.qrc)
+target_link_libraries(snes9x-qt snes9x-core ${LIBS})
+target_compile_definitions(snes9x-qt PRIVATE ${DEFINES})
+target_compile_options(snes9x-qt PRIVATE ${FLAGS})
+target_include_directories(snes9x-qt PRIVATE "../" ${INCLUDES})
+

qt/src/BindingPanel.cpp

@@ -0,0 +1,143 @@
+#include "BindingPanel.hpp"
+#include <QTimer>
+
+BindingPanel::BindingPanel(EmuApplication *app)
+    : app(app)
+{
+    binding_table_widget = nullptr;
+    joypads_changed = nullptr;
+}
+
+void BindingPanel::setTableWidget(QTableWidget *bindingTableWidget, EmuBinding *binding, int width, int height)
+{
+    keyboard_icon.addFile(":/icons/blackicons/key.svg");
+    joypad_icon.addFile(":/icons/blackicons/joypad.svg");
+    this->binding_table_widget = bindingTableWidget;
+    this->binding = binding;
+    table_width = width;
+    table_height = height;
+
+    connect(bindingTableWidget, &QTableWidget::cellActivated, [&](int row, int column) {
+        cellActivated(row, column);
+    });
+    connect(bindingTableWidget, &QTableWidget::cellPressed, [&](int row, int column) {
+        cellActivated(row, column);
+    });
+
+    fillTable();
+    cell_column = -1;
+    cell_row = -1;
+    awaiting_binding = false;
+}
+
+BindingPanel::~BindingPanel()
+{
+    app->qtapp->removeEventFilter(this);
+    timer.reset();
+}
+
+void BindingPanel::showEvent(QShowEvent *event)
+{
+    QWidget::showEvent(event);
+}
+
+void BindingPanel::hideEvent(QHideEvent *event)
+{
+    awaiting_binding = false;
+    setRedirectInput(false);
+    QWidget::hideEvent(event);
+}
+
+void BindingPanel::setRedirectInput(bool redirect)
+{
+    if (redirect)
+    {
+        app->binding_callback = [&](EmuBinding b)
+        {
+            finalizeCurrentBinding(b);
+        };
+
+        app->joypads_changed_callback = [&] {
+            if (joypads_changed)
+                joypads_changed();
+        };
+    }
+    else
+    {
+        app->binding_callback = nullptr;
+        app->joypads_changed_callback = nullptr;
+    }
+}
+
+void BindingPanel::updateCellFromBinding(int row, int column)
+{
+    EmuBinding &b = binding[row * table_width + column];
+    auto table_item = binding_table_widget->item(row, column);
+    if (!table_item)
+    {
+        table_item = new QTableWidgetItem();
+        binding_table_widget->setItem(row, column, table_item);
+    }
+
+    table_item->setText(b.to_string().c_str());;
+    table_item->setIcon(b.type == EmuBinding::Keyboard ? keyboard_icon :
+                        b.type == EmuBinding::Joystick ? joypad_icon :
+                        QIcon());
+}
+
+void BindingPanel::fillTable()
+{
+    for (int column = 0; column < table_width; column++)
+        for (int row = 0; row < table_height; row++)
+            updateCellFromBinding(row, column);
+}
+
+void BindingPanel::cellActivated(int row, int column)
+{
+    if (awaiting_binding)
+    {
+        updateCellFromBinding(cell_row, cell_column);
+    }
+    cell_column = column;
+    cell_row = row;
+
+    auto table_item = binding_table_widget->item(row, column);
+
+    if (!table_item)
+    {
+        table_item = new QTableWidgetItem();
+        binding_table_widget->setItem(row, column, table_item);
+    }
+
+    table_item->setText("...");
+
+    setRedirectInput(true);
+    awaiting_binding = true;
+    accept_return = false;
+}
+
+void BindingPanel::finalizeCurrentBinding(EmuBinding b)
+{
+    if (!awaiting_binding)
+        return;
+    auto &slot = binding[cell_row * this->table_width + cell_column];
+    slot = b;
+    if (b.type == EmuBinding::Keyboard && b.keycode == Qt::Key_Escape)
+        slot = {};
+
+    if (b.type == EmuBinding::Keyboard && b.keycode == Qt::Key_Return && !accept_return)
+    {
+        accept_return = true;
+        return;
+    }
+    
+    updateCellFromBinding(cell_row, cell_column);
+    setRedirectInput(false);
+    awaiting_binding = false;
+    app->updateBindings();
+}
+
+void BindingPanel::onJoypadsChanged(std::function<void()> func)
+{
+    joypads_changed = func;
+}

qt/src/BindingPanel.hpp

@@ -0,0 +1,37 @@
+#pragma once
+#include <QtEvents>
+#include <QIcon>
+#include <QTableWidget>
+#include "EmuApplication.hpp"
+
+class BindingPanel : public QWidget
+{
+  public:
+    BindingPanel(EmuApplication *app);
+    ~BindingPanel();
+    void setTableWidget(QTableWidget *bindingTableWidget, EmuBinding *binding, int width, int height);
+    void cellActivated(int row, int column);
+    void handleKeyPressEvent(QKeyEvent *event);
+    void updateCellFromBinding(int row, int column);
+    void showEvent(QShowEvent *event) override;
+    void hideEvent(QHideEvent *event) override;
+    void fillTable();
+    void checkJoypadInput();
+    void finalizeCurrentBinding(EmuBinding b);
+    void setRedirectInput(bool redirect);
+    void onJoypadsChanged(std::function<void()> func);
+
+    bool awaiting_binding;
+    bool accept_return;
+    int table_width;
+    int table_height;
+    int cell_row;
+    int cell_column;
+    QIcon keyboard_icon;
+    QIcon joypad_icon;
+    std::unique_ptr<QTimer> timer;
+    EmuApplication *app;
+    QTableWidget *binding_table_widget;
+    EmuBinding *binding;
+    std::function<void()> joypads_changed;
+};

qt/src/ControllerPanel.cpp

@@ -0,0 +1,153 @@
+#include "ControllerPanel.hpp"
+#include "SDLInputManager.hpp"
+#include "SDL_gamecontroller.h"
+#include <optional>
+#include <QtEvents>
+#include <QTimer>
+
+ControllerPanel::ControllerPanel(EmuApplication *app)
+    : BindingPanel(app)
+{
+    setupUi(this);
+    QObject::connect(controllerComboBox, &QComboBox::currentIndexChanged, [&](int index) {
+        BindingPanel::binding = this->app->config->binding.controller[index].buttons;
+        fillTable();
+        awaiting_binding = false;
+    });
+
+    BindingPanel::setTableWidget(tableWidget_controller,
+                                 app->config->binding.controller[0].buttons,
+                                 app->config->allowed_bindings,
+                                 app->config->num_controller_bindings);
+
+    auto action = edit_menu.addAction(QObject::tr("Clear Current Controller"));
+    action->connect(action, &QAction::triggered, [&](bool checked) {
+        clearCurrentController();
+    });
+
+    action = edit_menu.addAction(QObject::tr("Clear All Controllers"));
+    action->connect(action, &QAction::triggered, [&](bool checked) {
+        clearAllControllers();
+    });
+
+    auto swap_menu = edit_menu.addMenu(QObject::tr("Swap With"));
+    for (auto i = 0; i < 5; i++)
+    {
+        action = swap_menu->addAction(QObject::tr("Controller %1").arg(i + 1));
+        action->connect(action, &QAction::triggered, [&, i](bool) {
+            auto current_index = controllerComboBox->currentIndex();
+            if (current_index == i)
+                return;
+            swapControllers(i, current_index);
+            fillTable();
+        });
+    }
+
+    editToolButton->setMenu(&edit_menu);
+    editToolButton->setPopupMode(QToolButton::InstantPopup);
+
+    recreateAutoAssignMenu();
+    onJoypadsChanged([&]{ recreateAutoAssignMenu(); });
+}
+
+void ControllerPanel::recreateAutoAssignMenu()
+{
+    auto_assign_menu.clear();
+    auto controller_list = app->input_manager->getXInputControllers();
+
+    for (int i = 0; i < app->config->allowed_bindings; i++)
+    {
+        auto slot_menu = auto_assign_menu.addMenu(tr("Slot %1").arg(i));
+        auto default_keyboard = slot_menu->addAction(tr("Default Keyboard"));
+        default_keyboard->connect(default_keyboard, &QAction::triggered, [&, slot = i](bool) {
+            autoPopulateWithKeyboard(slot);
+        });
+
+        for (auto c : controller_list)
+        {
+            auto controller_item = slot_menu->addAction(c.second.c_str());
+            controller_item->connect(controller_item, &QAction::triggered, [&, id = c.first, slot = i](bool) {
+                autoPopulateWithJoystick(id, slot);
+            });
+        }
+    }
+    autoAssignToolButton->setMenu(&auto_assign_menu);
+    autoAssignToolButton->setPopupMode(QToolButton::InstantPopup);
+}
+
+void ControllerPanel::autoPopulateWithKeyboard(int slot)
+{
+    auto &buttons = app->config->binding.controller[controllerComboBox->currentIndex()].buttons;
+    const char *button_list[] = { "Up", "Down", "Left", "Right", "d", "c", "s", "x", "z", "a", "Return", "Space" };
+
+    for (int i = 0; i < std::size(button_list); i++)
+        buttons[app->config->allowed_bindings * i + slot] = EmuBinding::keyboard(QKeySequence::fromString(button_list[i])[0].key());
+
+    fillTable();
+}
+
+void ControllerPanel::autoPopulateWithJoystick(int joystick_id, int slot)
+{
+    auto &device = app->input_manager->devices[joystick_id];
+    auto sdl_controller = device.controller;
+    auto &buttons = app->config->binding.controller[controllerComboBox->currentIndex()].buttons;
+    const SDL_GameControllerButton list[] = { SDL_CONTROLLER_BUTTON_DPAD_UP,
+                                              SDL_CONTROLLER_BUTTON_DPAD_DOWN,
+                                              SDL_CONTROLLER_BUTTON_DPAD_LEFT,
+                                              SDL_CONTROLLER_BUTTON_DPAD_RIGHT,
+                                              // B, A and X, Y are inverted on XInput vs SNES
+                                              SDL_CONTROLLER_BUTTON_B,
+                                              SDL_CONTROLLER_BUTTON_A,
+                                              SDL_CONTROLLER_BUTTON_Y,
+                                              SDL_CONTROLLER_BUTTON_X,
+                                              SDL_CONTROLLER_BUTTON_LEFTSHOULDER,
+                                              SDL_CONTROLLER_BUTTON_RIGHTSHOULDER,
+                                              SDL_CONTROLLER_BUTTON_START,
+                                              SDL_CONTROLLER_BUTTON_BACK };
+    for (auto i = 0; i < std::size(list); i++)
+    {
+        auto sdl_binding = SDL_GameControllerGetBindForButton(sdl_controller, list[i]);
+        if (SDL_CONTROLLER_BINDTYPE_BUTTON == sdl_binding.bindType)
+            buttons[4 * i + slot] = EmuBinding::joystick_button(device.index, sdl_binding.value.button);
+        else if (SDL_CONTROLLER_BINDTYPE_HAT == sdl_binding.bindType)
+            buttons[4 * i + slot] = EmuBinding::joystick_hat(device.index, sdl_binding.value.hat.hat, sdl_binding.value.hat.hat_mask);
+        else if (SDL_CONTROLLER_BINDTYPE_AXIS == sdl_binding.bindType)
+            buttons[4 * i + slot] = EmuBinding::joystick_axis(device.index, sdl_binding.value.axis, sdl_binding.value.axis);
+    }
+    fillTable();
+}
+
+void ControllerPanel::swapControllers(int first, int second)
+{
+    auto &a = app->config->binding.controller[first].buttons;
+    auto &b = app->config->binding.controller[second].buttons;
+
+    int count = std::size(a);
+    for (int i = 0; i < count; i++)
+    {
+        EmuBinding swap = b[i];
+        b[i] = a[i];
+        a[i] = swap;
+    }
+}
+
+void ControllerPanel::clearCurrentController()
+{
+    auto &c = app->config->binding.controller[controllerComboBox->currentIndex()];
+    for (auto &b : c.buttons)
+        b = {};
+    fillTable();
+}
+
+void ControllerPanel::clearAllControllers()
+{
+    for (auto &c : app->config->binding.controller)
+        for (auto &b : c.buttons)
+            b = {};
+    fillTable();
+}
+
+ControllerPanel::~ControllerPanel()
+{
+}
+

qt/src/ControllerPanel.hpp

@@ -0,0 +1,23 @@
+#pragma once
+#include "ui_ControllerPanel.h"
+#include "BindingPanel.hpp"
+#include "EmuApplication.hpp"
+#include <QMenu>
+
+class ControllerPanel :
+    public Ui::ControllerPanel,
+    public BindingPanel
+{
+  public:
+    ControllerPanel(EmuApplication *app);
+    ~ControllerPanel();
+    void clearAllControllers();
+    void clearCurrentController();
+    void autoPopulateWithKeyboard(int slot);
+    void autoPopulateWithJoystick(int joystick_id, int slot);
+    void swapControllers(int first, int second);
+    void recreateAutoAssignMenu();
+
+    QMenu edit_menu;
+    QMenu auto_assign_menu;
+};

qt/src/ControllerPanel.ui

@@ -0,0 +1,325 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ControllerPanel</class>
+ <widget class="QWidget" name="ControllerPanel">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>674</width>
+    <height>632</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QLabel" name="label">
+       <property name="text">
+        <string>Set</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QComboBox" name="controllerComboBox">
+       <item>
+        <property name="text">
+         <string>SNES Controller 1</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>SNES Controller 2</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>SNES Controller 3 (Multitap)</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>SNES Controller 4 (Multitap)</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>SNES Controller 5 (Multitap)</string>
+        </property>
+       </item>
+      </widget>
+     </item>
+     <item>
+      <widget class="Line" name="line">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QToolButton" name="editToolButton">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="minimumSize">
+        <size>
+         <width>90</width>
+         <height>0</height>
+        </size>
+       </property>
+       <property name="toolTip">
+        <string>Swap or clear groups of bindings</string>
+       </property>
+       <property name="text">
+        <string>Edit</string>
+       </property>
+       <property name="popupMode">
+        <enum>QToolButton::DelayedPopup</enum>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QToolButton" name="autoAssignToolButton">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="minimumSize">
+        <size>
+         <width>90</width>
+         <height>0</height>
+        </size>
+       </property>
+       <property name="toolTip">
+        <string>Automatically assign a controller's buttons to a slot</string>
+       </property>
+       <property name="text">
+        <string>Auto-Assign</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="horizontalSpacer">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QTableWidget" name="tableWidget_controller">
+     <property name="editTriggers">
+      <set>QAbstractItemView::NoEditTriggers</set>
+     </property>
+     <property name="selectionMode">
+      <enum>QAbstractItemView::SingleSelection</enum>
+     </property>
+     <attribute name="verticalHeaderCascadingSectionResizes">
+      <bool>true</bool>
+     </attribute>
+     <row>
+      <property name="text">
+       <string>Up</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/up.svg</normaloff>:/icons/blackicons/up.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Down</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/down.svg</normaloff>:/icons/blackicons/down.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Left</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/left.svg</normaloff>:/icons/blackicons/left.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Right</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/right.svg</normaloff>:/icons/blackicons/right.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>A</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/a.svg</normaloff>:/icons/blackicons/a.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>B</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/b.svg</normaloff>:/icons/blackicons/b.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>X</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/x.svg</normaloff>:/icons/blackicons/x.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Y</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/y.svg</normaloff>:/icons/blackicons/y.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>L</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/l.svg</normaloff>:/icons/blackicons/l.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>R</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/r.svg</normaloff>:/icons/blackicons/r.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Start</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/start.svg</normaloff>:/icons/blackicons/start.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Select</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/select.svg</normaloff>:/icons/blackicons/select.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Turbo A</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/a.svg</normaloff>:/icons/blackicons/a.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Turbo B</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/b.svg</normaloff>:/icons/blackicons/b.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Turbo X</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/x.svg</normaloff>:/icons/blackicons/x.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Turbo Y</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/y.svg</normaloff>:/icons/blackicons/y.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Turbo L</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/l.svg</normaloff>:/icons/blackicons/l.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Turbo R</string>
+      </property>
+      <property name="icon">
+       <iconset resource="resources/snes9x.qrc">
+        <normaloff>:/icons/blackicons/r.svg</normaloff>:/icons/blackicons/r.svg</iconset>
+      </property>
+     </row>
+     <column>
+      <property name="text">
+       <string>Binding #1</string>
+      </property>
+     </column>
+     <column>
+      <property name="text">
+       <string>Binding #2</string>
+      </property>
+     </column>
+     <column>
+      <property name="text">
+       <string>Binding #3</string>
+      </property>
+     </column>
+     <column>
+      <property name="text">
+       <string>Binding #4</string>
+      </property>
+     </column>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources>
+  <include location="resources/snes9x.qrc"/>
+ </resources>
+ <connections/>
+</ui>

qt/src/DisplayPanel.cpp

@@ -0,0 +1,181 @@
+#include "DisplayPanel.hpp"
+#include <QFileDialog>
+
+DisplayPanel::DisplayPanel(EmuApplication *app_)
+    : app(app_)
+{
+    setupUi(this);
+
+    QObject::connect(comboBox_driver, &QComboBox::activated, [&](int index) {
+        if (driver_list.empty() || index < 0 || index >= driver_list.size())
+            return;
+
+        auto display_driver = driver_list[index].second;
+
+        if (display_driver != app->config->display_driver)
+        {
+            app->config->display_driver = display_driver;
+            app->window->recreateCanvas();
+            populateDevices();
+        }
+    });
+
+    QObject::connect(comboBox_device, &QComboBox::activated, [&](int index) {
+        if (app->config->display_device_index != index)
+        {
+            app->config->display_device_index = index;
+            app->window->recreateCanvas();
+        }
+    });
+
+    QObject::connect(checkBox_use_shader, &QCheckBox::clicked, [&](bool checked) {
+        app->config->use_shader = checked;
+        app->window->canvas->shaderChanged();
+    });
+
+    QObject::connect(pushButton_browse_shader, &QPushButton::clicked, [&] {
+        selectShaderDialog();
+    });
+
+    QObject::connect(checkBox_vsync, &QCheckBox::clicked, [&](bool checked) {
+        app->config->enable_vsync = checked;
+    });
+
+    QObject::connect(checkBox_reduce_input_lag, &QCheckBox::clicked, [&](bool checked) {
+        app->config->reduce_input_lag = checked;
+    });
+
+    QObject::connect(checkBox_bilinear_filter, &QCheckBox::clicked, [&](bool checked) {
+        app->config->bilinear_filter = checked;
+    });
+
+    QObject::connect(checkBox_adjust_for_vrr, &QCheckBox::clicked, [&](bool checked) {
+        app->config->adjust_for_vrr = checked;
+    });
+
+    //
+
+    QObject::connect(checkBox_maintain_aspect_ratio, &QCheckBox::clicked, [&](bool checked) {
+        app->config->maintain_aspect_ratio = checked;
+    });
+
+    QObject::connect(checkBox_integer_scaling, &QCheckBox::clicked, [&](bool checked) {
+        app->config->use_integer_scaling = checked;
+    });
+
+    QObject::connect(checkBox_overscan, &QCheckBox::clicked, [&](bool checked) {
+        app->config->show_overscan = checked;
+        app->updateSettings();
+    });
+
+    QObject::connect(comboBox_aspect_ratio, &QComboBox::activated, [&](int index) {
+        auto &num = app->config->aspect_ratio_numerator;
+        auto &den = app->config->aspect_ratio_denominator;
+        if (index == 0) { num = 4,  den = 3;  }
+        if (index == 1) { num = 64, den = 49; }
+        if (index == 2) { num = 8,  den = 7;  }
+    });
+
+    QObject::connect(comboBox_high_resolution_mode, &QComboBox::currentIndexChanged, [&](int index) {
+        app->config->high_resolution_effect = index;
+        app->updateSettings();
+    });
+
+    QObject::connect(comboBox_messages, &QComboBox::currentIndexChanged, [&](int index) {
+        bool restart = (app->config->display_messages == EmuConfig::eOnscreen || index == EmuConfig::eOnscreen);
+
+        app->config->display_messages = index;
+        app->updateSettings();
+        if (restart)
+            app->window->recreateCanvas();
+    });
+
+    QObject::connect(spinBox_osd_size, &QSpinBox::valueChanged, [&](int value) {
+        bool restart = (app->config->osd_size != value && app->config->display_messages == EmuConfig::eOnscreen);
+        app->config->osd_size = value;
+        if (restart)
+            app->window->recreateCanvas();
+    });
+}
+
+DisplayPanel::~DisplayPanel()
+{
+}
+
+void DisplayPanel::selectShaderDialog()
+{
+    QFileDialog dialog(this, tr("Select a Folder"));
+    dialog.setFileMode(QFileDialog::ExistingFile);
+    dialog.setNameFilter(tr("Shader Presets (*.slangp *.glslp)"));
+    if (!app->config->last_shader_folder.empty())
+        dialog.setDirectory(app->config->last_shader_folder.c_str());
+
+    if (!dialog.exec())
+        return;
+
+    app->config->shader = dialog.selectedFiles().at(0).toUtf8();
+    app->config->last_shader_folder = dialog.directory().absolutePath().toStdString();
+    lineEdit_shader->setText(app->config->shader.c_str());
+    app->window->canvas->shaderChanged();
+}
+
+void DisplayPanel::populateDevices()
+{
+    comboBox_device->clear();
+    auto device_list = app->window->getDisplayDeviceList();
+    for (auto &d : device_list)
+        comboBox_device->addItem(d.c_str());
+    comboBox_device->setCurrentIndex(app->config->display_device_index);
+}
+
+void DisplayPanel::showEvent(QShowEvent *event)
+{
+    auto &config = app->config;
+
+    comboBox_driver->clear();
+    comboBox_driver->addItem("Qt Software");
+    comboBox_driver->addItem("OpenGL");
+    comboBox_driver->addItem("Vulkan");
+
+    driver_list.clear();
+    driver_list.push_back({ driver_list.size(), "qt" });
+    driver_list.push_back({ driver_list.size(), "opengl" });
+    driver_list.push_back({ driver_list.size(), "vulkan" });
+
+    for (auto &i : driver_list)
+        if (config->display_driver == i.second)
+        {
+            comboBox_driver->setCurrentIndex(i.first);
+            break;
+        }
+
+    populateDevices();
+
+    checkBox_use_shader->setChecked(config->use_shader);
+    lineEdit_shader->setText(config->shader.c_str());
+
+    checkBox_vsync->setChecked(config->enable_vsync);
+    checkBox_reduce_input_lag->setChecked(config->reduce_input_lag);
+    checkBox_bilinear_filter->setChecked(config->bilinear_filter);
+    checkBox_adjust_for_vrr->setChecked(config->adjust_for_vrr);
+
+    checkBox_maintain_aspect_ratio->setChecked(config->maintain_aspect_ratio);
+    checkBox_integer_scaling->setChecked(config->use_integer_scaling);
+    checkBox_overscan->setChecked(config->show_overscan);
+
+    if (config->aspect_ratio_numerator == 4)
+        comboBox_aspect_ratio->setCurrentIndex(0);
+    else if (config->aspect_ratio_numerator == 64)
+        comboBox_aspect_ratio->setCurrentIndex(1);
+    else if (config->aspect_ratio_numerator == 8)
+        comboBox_aspect_ratio->setCurrentIndex(2);
+
+    comboBox_high_resolution_mode->setCurrentIndex(config->high_resolution_effect);
+
+    comboBox_messages->setCurrentIndex(config->display_messages);
+    spinBox_osd_size->setValue(config->osd_size);
+
+    QWidget::showEvent(event);
+}
+
+

qt/src/DisplayPanel.hpp

@@ -0,0 +1,20 @@
+#pragma once
+#include "ui_DisplayPanel.h"
+#include "EmuApplication.hpp"
+
+class DisplayPanel :
+    public Ui::DisplayPanel,
+    public QWidget
+{
+  public:
+    DisplayPanel(EmuApplication *app);
+    ~DisplayPanel();
+    void showEvent(QShowEvent *event) override;
+    void populateDevices();
+    void selectShaderDialog();
+
+    std::vector<std::pair<int, std::string>> driver_list;
+    bool updating = true;
+
+    EmuApplication *app;
+};

qt/src/DisplayPanel.ui

@@ -0,0 +1,389 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>DisplayPanel</class>
+ <widget class="QWidget" name="DisplayPanel">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>669</width>
+    <height>654</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="groupBox">
+     <property name="title">
+      <string>Display Output</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_2">
+      <item>
+       <layout class="QGridLayout" name="gridLayout_driver">
+        <item row="0" column="0">
+         <widget class="QLabel" name="label">
+          <property name="text">
+           <string>Driver:</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="1">
+         <widget class="QComboBox" name="comboBox_device">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="toolTip">
+           <string>Choose a device to render output. If you have no integrated graphics, there will be only one choice.</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="1">
+         <widget class="QComboBox" name="comboBox_driver">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="toolTip">
+           <string>Select the output driver.</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="0">
+         <widget class="QLabel" name="label_2">
+          <property name="text">
+           <string>Device:</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <layout class="QGridLayout" name="gridLayout_3">
+        <item row="2" column="0">
+         <widget class="QCheckBox" name="checkBox_bilinear_filter">
+          <property name="toolTip">
+           <string>Smooth screen output.</string>
+          </property>
+          <property name="text">
+           <string>Bilinear filter</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="1">
+         <widget class="QCheckBox" name="checkBox_reduce_input_lag">
+          <property name="toolTip">
+           <string>Prevent the display driver from getting too far ahead in order to reduce lag.</string>
+          </property>
+          <property name="text">
+           <string>Reduce input lag</string>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="1">
+         <widget class="QCheckBox" name="checkBox_adjust_for_vrr">
+          <property name="toolTip">
+           <string>When entering fullscreen mode, temporarily change other settings to use VRR (G-Sync or FreeSync) correctly.</string>
+          </property>
+          <property name="text">
+           <string>Adjust settings for VRR in fullscreen mode</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="0">
+         <widget class="QCheckBox" name="checkBox_vsync">
+          <property name="toolTip">
+           <string>Sync the display to vertical retrace to eliminate tearing.</string>
+          </property>
+          <property name="text">
+           <string>Enable vsync</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout">
+        <item>
+         <widget class="QCheckBox" name="checkBox_use_shader">
+          <property name="toolTip">
+           <string>Use a selected .slangp or .glslp shader file. 
+.slangp is supported by Vulkan and OpenGL. 
+.glslp is supported by OpenGL.</string>
+          </property>
+          <property name="text">
+           <string>Use a hardware shader:</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QLineEdit" name="lineEdit_shader"/>
+        </item>
+        <item>
+         <widget class="QPushButton" name="pushButton_browse_shader">
+          <property name="text">
+           <string>Browse...</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_2">
+     <property name="title">
+      <string>Scaling and Aspect Ratio</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_3">
+      <item>
+       <layout class="QGridLayout" name="gridLayout_4">
+        <item row="0" column="0">
+         <widget class="QCheckBox" name="checkBox_maintain_aspect_ratio">
+          <property name="toolTip">
+           <string>Keep the screen at the requested proportions for width and height.</string>
+          </property>
+          <property name="text">
+           <string>Maintain aspect ratio</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="1">
+         <widget class="QCheckBox" name="checkBox_integer_scaling">
+          <property name="toolTip">
+           <string>When scaling up, only use integer multiples of the original height.</string>
+          </property>
+          <property name="text">
+           <string>Use integer scaling</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="0">
+         <widget class="QCheckBox" name="checkBox_overscan">
+          <property name="toolTip">
+           <string>Show the areas on the top and bottom of the screen that are normally black and hidden by the TV. Some games will draw in these areas.</string>
+          </property>
+          <property name="text">
+           <string>Show overscan area</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <layout class="QGridLayout" name="gridLayout_2">
+        <item row="1" column="0">
+         <widget class="QLabel" name="label_4">
+          <property name="text">
+           <string>High-resolution mode:</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="1">
+         <widget class="QComboBox" name="comboBox_aspect_ratio">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <item>
+           <property name="text">
+            <string>4:3 - Classic display aspect</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>64:49 - NTSC aspect</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>8:7 - Square pixels</string>
+           </property>
+          </item>
+         </widget>
+        </item>
+        <item row="0" column="0">
+         <widget class="QLabel" name="label_3">
+          <property name="text">
+           <string>Aspect ratio:</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="1">
+         <widget class="QComboBox" name="comboBox_high_resolution_mode">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="toolTip">
+           <string>This affects the rarely used 512-pixels-wide mode used by the SNES.
+For games like Kirby 3 and Jurassic Park, choose the &quot;merge fields&quot; option.
+For games like Seiken Densetsu 3 and Marvelous, choose the &quot;scale up&quot; option.
+Output directly will cause the screen to change between the two modes and look weird.</string>
+          </property>
+          <item>
+           <property name="text">
+            <string>Output directly</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>Merge the fields of the high-resolution lines</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>Scale normal resolution screens up</string>
+           </property>
+          </item>
+         </widget>
+        </item>
+        <item row="0" column="2">
+         <spacer name="horizontalSpacer_2">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_3">
+     <property name="title">
+      <string>Software Filters</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_4">
+      <item>
+       <widget class="QComboBox" name="comboBox"/>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_4">
+     <property name="title">
+      <string>Messages</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_5">
+      <item>
+       <layout class="QGridLayout" name="gridLayout_5">
+        <item row="0" column="0">
+         <widget class="QLabel" name="label_5">
+          <property name="text">
+           <string>Display messages:</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="1">
+         <widget class="QComboBox" name="comboBox_messages">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <item>
+           <property name="text">
+            <string>Onscreen - High resolution</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>Inside the screen - Low resolution</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>Don't display messages</string>
+           </property>
+          </item>
+         </widget>
+        </item>
+        <item row="1" column="1">
+         <widget class="QSpinBox" name="spinBox_osd_size">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="alignment">
+           <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+          </property>
+          <property name="suffix">
+           <string>pt</string>
+          </property>
+          <property name="minimum">
+           <number>8</number>
+          </property>
+          <property name="maximum">
+           <number>256</number>
+          </property>
+          <property name="value">
+           <number>24</number>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="0">
+         <widget class="QLabel" name="label_6">
+          <property name="text">
+           <string>Onscreen display size:</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="2">
+         <spacer name="horizontalSpacer_3">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>40</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

qt/src/EmuApplication.cpp

@@ -0,0 +1,352 @@
+#include "EmuApplication.hpp"
+#include "common/audio/s9x_sound_driver_sdl.hpp"
+#include "common/audio/s9x_sound_driver_portaudio.hpp"
+#include "common/audio/s9x_sound_driver_cubeb.hpp"
+#include <QTimer>
+#include <chrono>
+#include <thread>
+using namespace std::chrono_literals;
+
+EmuApplication::EmuApplication()
+{
+    core = Snes9xController::get();
+}
+
+EmuApplication::~EmuApplication()
+{
+    core->deinit();
+}
+
+void EmuApplication::restartAudio()
+{
+    sound_driver.reset();
+    core->sound_output_function = nullptr;
+
+    if (config->sound_driver == "portaudio")
+        sound_driver = std::make_unique<S9xPortAudioSoundDriver>();
+    else if (config->sound_driver == "cubeb")
+        sound_driver = std::make_unique<S9xCubebSoundDriver>();
+    else
+    {
+        config->sound_driver = "sdl";
+        sound_driver = std::make_unique<S9xSDLSoundDriver>();
+    }
+
+    sound_driver->init();
+    if (sound_driver->open_device(config->playback_rate, config->audio_buffer_size_ms))
+        sound_driver->start();
+    else
+    {
+        printf("Couldn't initialize sound driver: %s\n", config->sound_driver.c_str());
+        sound_driver.reset();
+    }
+
+    if (sound_driver)
+        core->sound_output_function = [&](int16_t *data, int samples) {
+            writeSamples(data, samples);
+        };
+}
+
+void EmuApplication::writeSamples(int16_t *data, int samples)
+{
+    if (config->speed_sync_method == EmuConfig::eSoundSync && !core->isAbnormalSpeed())
+    {
+        int iterations = 0;
+        while (sound_driver->space_free() < samples && iterations < 100)
+        {
+            iterations++;
+            std::this_thread::sleep_for(50us);
+        }
+    }
+
+    sound_driver->write_samples(data, samples);
+    auto buffer_level = sound_driver->buffer_level();
+    core->updateSoundBufferLevel(buffer_level.first, buffer_level.second);
+}
+
+void EmuApplication::startGame()
+{
+    if (!sound_driver)
+        restartAudio();
+
+    core->screen_output_function = [&](uint16_t *data, int width, int height, int stride_bytes, double frame_rate) {
+        if (window->canvas)
+            window->canvas->output((uint8_t *)data, width, height, QImage::Format_RGB16, stride_bytes, frame_rate);
+    };
+
+    core->updateSettings(config.get());
+    updateBindings();
+
+    startIdleLoop();
+}
+
+bool EmuApplication::isPaused()
+{
+    return (pause_count != 0);
+}
+
+void EmuApplication::pause()
+{
+    pause_count++;
+    if (pause_count > 0)
+    {
+        core->setPaused(true);
+        if (sound_driver)
+            sound_driver->stop();
+    }
+}
+
+void EmuApplication::stopIdleLoop()
+{
+    idle_loop->stop();
+    pause_count = 0;
+}
+
+void EmuApplication::unpause()
+{
+    pause_count--;
+    if (pause_count < 0)
+        pause_count = 0;
+    if (pause_count > 0)
+        return;
+
+    core->setPaused(false);
+    if (core->active && sound_driver)
+        sound_driver->start();
+}
+
+void EmuApplication::startIdleLoop()
+{
+    if (!idle_loop)
+    {
+        idle_loop = std::make_unique<QTimer>();
+        idle_loop->setTimerType(Qt::TimerType::PreciseTimer);
+        idle_loop->setInterval(0);
+        idle_loop->setSingleShot(false);
+        idle_loop->callOnTimeout([&]{ idleLoop(); });
+        pause_count = 0;
+    }
+
+    idle_loop->start();
+}
+
+void EmuApplication::idleLoop()
+{
+    if (core->active && pause_count == 0)
+    {            
+        idle_loop->setInterval(0);
+        pollJoysticks();
+        bool muted = config->mute_audio || (config->mute_audio_during_alternate_speed && core->isAbnormalSpeed());
+        core->mute(muted);
+        core->mainLoop();
+    }
+    else
+    {
+        pollJoysticks();
+        idle_loop->setInterval(32);
+    }
+}
+
+bool EmuApplication::openFile(std::string filename)
+{
+    auto result = core->openFile(filename);
+
+    return result;
+}
+
+void EmuApplication::reportBinding(EmuBinding b, bool active)
+{
+    if (binding_callback && active)
+    {
+        binding_callback(b);
+        return;
+    }
+
+    auto it = bindings.find(b.hash());
+    if (it == bindings.end())
+        return;
+
+    if (it->second.second == UI)
+    {
+        handleBinding(it->second.first, active);
+        return;
+    }
+
+    core->reportBinding(b, active);
+}
+
+void EmuApplication::updateBindings()
+{
+    bindings.clear();
+    for (auto i = 0; i < EmuConfig::num_shortcuts; i++)
+    {
+        auto name = EmuConfig::getShortcutNames()[i];
+
+        for (auto b = 0; b < EmuConfig::allowed_bindings; b++)
+        {
+            auto &binding = config->binding.shortcuts[i * EmuConfig::allowed_bindings + b];
+
+            if (binding.type != EmuBinding::None)
+            {
+                auto handler = core->acceptsCommand(name) ? Core : UI;
+                bindings.insert({ binding.hash(), { name, handler } });
+            }
+        }
+    }
+
+    for (int i = 0; i < EmuConfig::num_controller_bindings; i++)
+    {
+        for (int c = 0; c < 5; c++)
+        {
+            for (int b = 0; b < EmuConfig::allowed_bindings; b++)
+            {
+                auto binding = config->binding.controller[c].buttons[i * EmuConfig::allowed_bindings + b];
+                if (binding.hash() != 0)
+                    bindings.insert({ binding.hash(), { "Snes9x", Core } });
+            }
+        }
+    }
+
+    core->updateBindings(config.get());
+}
+
+void EmuApplication::handleBinding(std::string name, bool pressed)
+{
+    if (core->active)
+    {
+        if (name == "Rewind")
+        {
+            core->rewinding = pressed;
+        }
+        else if (pressed) // Only activate with core active and on button down
+        {
+            if (name == "PauseContinue")
+            {
+                window->pauseContinue();
+            }
+            
+            else if (name == "IncreaseSlot")
+            {
+                save_slot++;
+                if (save_slot > 999)
+                    save_slot = 0;
+                core->setMessage("Current slot: " + std::to_string(save_slot));
+            }
+            else if (name == "DecreaseSlot")
+            {
+                save_slot--;
+                if (save_slot < 0)
+                    save_slot = 999;
+                core->setMessage("Current slot: " + std::to_string(save_slot));
+            }
+            else if (name == "SaveState")
+            {
+                saveState(save_slot);
+            }
+            else if (name == "LoadState")
+            {
+                loadState(save_slot);
+            }
+        }
+    }
+
+    if (name == "ToggleFullscreen" && !pressed)
+    {
+        window->toggleFullscreen();
+    }
+    else if (name == "OpenROM" && pressed)
+    {
+        window->openFile();
+    }
+}
+
+bool EmuApplication::isBound(EmuBinding b)
+{
+    if (bindings.find(b.hash()) != bindings.end())
+        return true;
+    return false;
+}
+
+void EmuApplication::updateSettings()
+{
+    core->updateSettings(config.get());
+}
+
+void EmuApplication::pollJoysticks()
+{
+    while (1)
+    {
+        auto event = input_manager->ProcessEvent();
+        if (!event)
+            return;
+
+        switch (event->type)
+        {
+        case SDL_JOYDEVICEADDED:
+        case SDL_JOYDEVICEREMOVED:
+            if (joypads_changed_callback)
+                joypads_changed_callback();
+            break;
+        case SDL_JOYAXISMOTION: {
+            auto axis_event = input_manager->DiscretizeJoyAxisEvent(event.value());
+            if (axis_event)
+            {
+                auto binding = EmuBinding::joystick_axis(
+                    axis_event->joystick_num,
+                    axis_event->axis,
+                    axis_event->direction);
+
+                reportBinding(binding, axis_event->pressed);
+            }
+            break;
+        }
+        case SDL_JOYBUTTONDOWN:
+        case SDL_JOYBUTTONUP:
+            reportBinding(EmuBinding::joystick_button(
+                              input_manager->devices[event->jbutton.which].index,
+                              event->jbutton.button), event->jbutton.state == 1);
+            break;
+        case SDL_JOYHATMOTION:
+            auto hat_event = input_manager->DiscretizeHatEvent(event.value());
+            if (hat_event)
+            {
+                reportBinding(EmuBinding::joystick_hat(hat_event->joystick_num,
+                                                       hat_event->hat,
+                                                       hat_event->direction),
+                              hat_event->pressed);
+            }
+
+            break;
+        }
+    }
+}
+
+void EmuApplication::loadState(int slot)
+{
+    core->loadState(slot);
+}
+
+void EmuApplication::loadState(std::string filename)
+{
+    core->loadState(filename);
+}
+
+void EmuApplication::saveState(int slot)
+{
+    core->saveState(slot);
+}
+
+void EmuApplication::saveState(std::string filename)
+{
+    core->saveState(filename);
+}
+
+void EmuApplication::reset()
+{
+    core->softReset();
+}
+
+void EmuApplication::powerCycle()
+{
+    core->reset();
+}

qt/src/EmuApplication.hpp

@@ -0,0 +1,57 @@
+#pragma once
+#include <QApplication>
+#include <QTimer>
+
+#include "EmuMainWindow.hpp"
+#include "EmuConfig.hpp"
+#include "SDLInputManager.hpp"
+#include "Snes9xController.hpp"
+#include "common/audio/s9x_sound_driver.hpp"
+
+
+struct EmuApplication
+{
+    std::unique_ptr<QApplication> qtapp;
+    std::unique_ptr<EmuConfig> config;
+    std::unique_ptr<SDLInputManager> input_manager;
+    std::unique_ptr<EmuMainWindow> window;
+    std::unique_ptr<S9xSoundDriver> sound_driver;
+    Snes9xController *core;
+
+    EmuApplication();
+    ~EmuApplication();
+    bool openFile(std::string filename);
+    void handleBinding(std::string name, bool pressed);
+    void updateSettings();
+    void updateBindings();
+    bool isBound(EmuBinding b);
+    void reportBinding(EmuBinding b, bool active);
+    void pollJoysticks();
+    void restartAudio();
+    void writeSamples(int16_t *data, int samples);
+    void pause();
+    void reset();
+    void powerCycle();
+    bool isPaused();
+    void unpause();
+    void loadState(int slot);
+    void loadState(std::string filename);
+    void saveState(int slot);
+    void saveState(std::string filename);
+    void startGame();
+    void startIdleLoop();
+    void stopIdleLoop();
+    void idleLoop();
+
+    enum Handler
+    {
+        Core = 0,
+        UI   = 1
+    };
+    std::map<uint32_t, std::pair<std::string, Handler>> bindings;
+    std::unique_ptr<QTimer> idle_loop;
+    std::function<void(EmuBinding)> binding_callback = nullptr;
+    std::function<void()> joypads_changed_callback = nullptr;
+    int save_slot = 0;
+    int pause_count = 0;
+};

qt/src/EmuBinding.cpp

@@ -0,0 +1,226 @@
+#include "EmuBinding.hpp"
+#include "SDL_joystick.h"
+#include <QString>
+#include <QKeySequence>
+#include <sstream>
+
+// Hash format:
+//
+// Bit 31-30: Joystick or Keyboard bit
+//
+// Keyboard:
+//   Bit 30: Alt
+//   Bit 29: Ctrl
+//   Bit 28: Super
+//   Bit 27: Shift
+//   Bits 15-0: keycode
+//
+// Joystick:
+//   Bits 29-28: Type:
+//                  00 Button
+//                  01 Axis
+//                  10 Hat
+//   Bit 27: If axis or hat, positive or negative
+//   Bits 26-19: Which button/hat/axis
+//   Bits 15-8: Hat direction
+//   Bits 7-0: Device identifier
+uint32_t EmuBinding::hash() const
+{
+    uint32_t hash = 0;
+
+    hash |= type << 30;
+    if (type == Keyboard)
+    {
+        hash |= alt << 29;
+        hash |= ctrl << 28;
+        hash |= super << 27;
+        hash |= shift << 26;
+        hash |= keycode & 0xfffffff;
+    }
+    else
+    {
+        hash |= (input_type & 0x3) << 28;
+        hash |= (threshold < 0 ? 1 : 0) << 27;
+        hash |= (button & 0xff) << 19;
+        hash |= (input_type == Hat) ? direction << 8 : 0;
+        hash |= (guid & 0xff);
+    }
+
+    return hash;
+}
+
+bool EmuBinding::operator==(const EmuBinding &other)
+{
+    return other.hash() == hash();
+}
+
+EmuBinding EmuBinding::joystick_axis(int device, int axis, int threshold)
+{
+    EmuBinding binding;
+    binding.type = Joystick;
+    binding.input_type = Axis;
+    binding.guid = device;
+    binding.axis = axis;
+    binding.threshold = threshold;
+    return binding;
+}
+
+EmuBinding EmuBinding::joystick_hat(int device, int hat, uint8_t direction)
+{
+    EmuBinding binding{};
+    binding.type = Joystick;
+    binding.input_type = Hat;
+    binding.guid = device;
+    binding.hat = hat;
+    binding.direction = direction;
+    return binding;
+}
+
+EmuBinding EmuBinding::joystick_button(int device, int button)
+{
+    EmuBinding binding{};
+    binding.type = Joystick;
+    binding.input_type = Button;
+    binding.guid = device;
+    binding.button = button;
+    return binding;
+}
+
+EmuBinding EmuBinding::keyboard(int keycode, bool shift, bool alt, bool ctrl, bool super)
+{
+    EmuBinding binding{};
+    binding.type = Keyboard;
+    binding.alt = alt;
+    binding.ctrl = ctrl;
+    binding.shift = shift;
+    binding.super = super;
+    binding.keycode = keycode;
+    return binding;
+}
+
+EmuBinding EmuBinding::from_config_string(std::string string)
+{
+    for (auto &c : string)
+        if (c >= 'A' && c <= 'Z')
+            c += 32;
+
+    if (string.compare(0, 9, "keyboard ") == 0)
+    {
+        EmuBinding b{};
+        b.type = Keyboard;
+
+        QString qstr(string.substr(9).c_str());
+        auto seq = QKeySequence::fromString(qstr);
+        if (seq.count())
+        {
+            b.keycode = seq[0].key();
+            b.alt = seq[0].keyboardModifiers().testAnyFlag(Qt::AltModifier);
+            b.ctrl = seq[0].keyboardModifiers().testAnyFlag(Qt::ControlModifier);
+            b.super = seq[0].keyboardModifiers().testAnyFlag(Qt::MetaModifier);
+            b.shift = seq[0].keyboardModifiers().testAnyFlag(Qt::ShiftModifier);
+        }
+
+        return b;
+    }
+    else if (string.compare(0, 8, "joystick") == 0)
+    {
+        auto substr = string.substr(8);
+        unsigned int axis;
+        unsigned int button;
+        unsigned int percent;
+        unsigned int device;
+        char direction_string[6]{};
+        char posneg;
+
+        if (sscanf(substr.c_str(), "%u axis %u %c %u", &device, &axis, &posneg, &percent) == 4)
+        {
+            int sign = posneg == '-' ? -1 : 1;
+            return joystick_axis(device, axis, sign * percent);
+        }
+        else if (sscanf(substr.c_str(), "%u button %u", &device, &button) == 2)
+        {
+            return joystick_button(device, button);
+        }
+        else if (sscanf(substr.c_str(), "%u hat %u %5s", &device, &axis, direction_string))
+        {
+            uint8_t direction;
+            if (!strcmp(direction_string, "up"))
+                direction = SDL_HAT_UP;
+            else if (!strcmp(direction_string, "down"))
+                direction = SDL_HAT_DOWN;
+            else if (!strcmp(direction_string, "left"))
+                direction = SDL_HAT_LEFT;
+            else if (!strcmp(direction_string, "right"))
+                direction = SDL_HAT_RIGHT;
+
+            return joystick_hat(device, axis, direction);
+        }
+    }
+
+    return {};
+}
+
+std::string EmuBinding::to_config_string()
+{
+    return to_string(true);
+}
+
+std::string EmuBinding::to_string(bool config)
+{
+    std::string rep;
+    if (type == Keyboard)
+    {
+        if (config)
+            rep += "Keyboard ";
+
+        if (ctrl)
+            rep += "Ctrl+";
+        if (alt)
+            rep += "Alt+";
+        if (shift)
+            rep += "Shift+";
+        if (super)
+            rep += "Super+";
+
+        QKeySequence seq(keycode);
+        rep += seq.toString().toStdString();
+    }
+    else if (type == Joystick)
+    {
+        if (config)
+            rep += "joystick " + std::to_string(guid) + " ";
+        else
+            rep += "J" + std::to_string(guid) + " ";
+
+        if (input_type == Button)
+        {
+            rep += "Button ";
+            rep += std::to_string(button);
+        }
+        if (input_type == Axis)
+        {
+            rep += "Axis ";
+            rep += std::to_string(axis) + " ";
+            rep += std::to_string(threshold) + "%";
+        }
+        if (input_type == Hat)
+        {
+            rep += "Hat ";
+            rep += std::to_string(hat) + " ";
+            if (direction == SDL_HAT_UP)
+                rep += "Up";
+            else if (direction == SDL_HAT_DOWN)
+                rep += "Down";
+            else if (direction == SDL_HAT_LEFT)
+                rep += "Left";
+            else if (direction == SDL_HAT_RIGHT)
+                rep += "Right";
+        }
+    }
+    else
+    {
+        rep = "None";
+    }
+
+    return rep;
+}

qt/src/EmuBinding.hpp

@@ -0,0 +1,60 @@
+#ifndef __EMU_BINDING_HPP
+#define __EMU_BINDING_HPP
+#include <cstdint>
+#include <string>
+#include <vector>
+
+struct EmuBinding
+{
+    uint32_t hash() const;
+    std::string to_string(bool config = false);
+    static EmuBinding joystick_axis(int device, int axis, int threshold);
+    static EmuBinding joystick_hat(int device, int hat, uint8_t direction);
+    static EmuBinding joystick_button(int device, int button);
+    static EmuBinding keyboard(int keycode, bool shift = false, bool alt = false, bool ctrl = false, bool super = false);
+    static EmuBinding from_config_string(std::string str);
+    std::string to_config_string();
+    bool operator==(const EmuBinding &);
+
+    enum Type
+    {
+        None = 0,
+        Keyboard = 1,
+        Joystick = 2
+    };
+    Type type;
+
+    enum JoystickInputType
+    {
+        Button = 0,
+        Axis = 1,
+        Hat = 2
+    };
+
+    union
+    {
+        struct
+        {
+            bool alt;
+            bool ctrl;
+            bool super;
+            bool shift;
+            int keycode;
+        };
+
+        struct
+        {
+            JoystickInputType input_type;
+            int guid;
+            union {
+                int button;
+                int hat;
+                int axis;
+            };
+            int threshold;
+            uint8_t direction;
+        };
+    };
+};
+
+#endif

qt/src/EmuCanvas.cpp

@@ -0,0 +1,107 @@
+#include "EmuCanvas.hpp"
+#include <qnamespace.h>
+#include <qwidget.h>
+
+EmuCanvas::EmuCanvas(EmuConfig *config, QWidget *parent, QWidget *main_window)
+    : QWidget(parent)
+{
+    setFocus();
+    setFocusPolicy(Qt::StrongFocus);
+    setMouseTracking(true);
+
+    output_data.buffer = nullptr;
+    output_data.ready = false;
+    this->config = config;
+    this->parent = parent;
+    this->main_window = main_window;
+}
+
+EmuCanvas::~EmuCanvas()
+{
+}
+
+void EmuCanvas::output(uint8_t *buffer, int width, int height, QImage::Format format, int bytes_per_line, double frame_rate)
+{
+    output_data.buffer = buffer;
+    output_data.width = width;
+    output_data.height = height;
+    output_data.format = format;
+    output_data.bytes_per_line = bytes_per_line;
+    output_data.frame_rate = frame_rate;
+    output_data.ready = true;
+    draw();
+}
+
+void EmuCanvas::throttle()
+{
+    if (config->speed_sync_method != EmuConfig::eTimer && config->speed_sync_method != EmuConfig::eTimerWithFrameskip)
+        return;
+
+    throttle_object.set_frame_rate(config->fixed_frame_rate == 0.0 ? output_data.frame_rate : config->fixed_frame_rate);
+    throttle_object.wait_for_frame_and_rebase_time();
+}
+
+QRect EmuCanvas::applyAspect(const QRect &viewport)
+{
+    if (!config->scale_image)
+    {
+        return QRect((viewport.width() - output_data.width) / 2,
+                     (viewport.height() - output_data.height) / 2,
+                     output_data.width,
+                     output_data.height);
+    }
+    if (!config->maintain_aspect_ratio)
+        return viewport;
+
+    int num = config->aspect_ratio_numerator;
+    int den = config->aspect_ratio_denominator;
+    if (config->show_overscan)
+    {
+        num *= 224;
+        den *= 239;
+    }
+
+    if (config->use_integer_scaling)
+    {
+        int max_scale = 1;
+
+        for (int i = 2; i < 20; i++)
+        {
+            int scaled_height = output_data.height * i;
+            int scaled_width = scaled_height * num / den;
+            if (scaled_width <= viewport.width() && scaled_height <= viewport.height())
+                max_scale = i;
+            else
+                break;
+        }
+
+        int new_height = output_data.height * max_scale;
+        int new_width = new_height * num / den;
+        return QRect((viewport.width() - new_width) / 2,
+                     (viewport.height() - new_height) / 2,
+                     new_width,
+                     new_height);
+    }
+
+    double canvas_aspect = (double)viewport.width() / viewport.height();
+    double new_aspect = (double)num / den;
+
+    if (canvas_aspect > new_aspect)
+    {
+        int new_width = viewport.height() * num / den;
+        int new_x = (viewport.width() - new_width) / 2;
+
+        return { new_x,
+                 viewport.y(),
+                 new_width,
+                 viewport.height() };
+    }
+
+    int new_height = viewport.width() * den / num;
+    int new_y = (viewport.height() - new_height) / 2;
+
+    return { viewport.x(),
+             new_y,
+             viewport.width(),
+             new_height };
+}

qt/src/EmuCanvas.hpp

@@ -0,0 +1,73 @@
+#pragma once
+#include <QWidget>
+#include <QImage>
+#include "EmuConfig.hpp"
+#include "../../vulkan/std_chrono_throttle.hpp"
+
+class EmuCanvas : public QWidget
+{
+  public:
+    EmuCanvas(EmuConfig *config, QWidget *parent, QWidget *main_window);
+    ~EmuCanvas();
+
+    virtual void deinit() = 0;
+    virtual void draw() = 0;
+    void output(uint8_t *buffer, int width, int height, QImage::Format format, int bytes_per_line, double frame_rate);
+    void throttle();
+
+    virtual std::vector<std::string> getDeviceList()
+    {
+        return std::vector<std::string>{ "Default" };
+    }
+
+    bool ready()
+    {
+        return output_data.ready;
+    }
+
+    QRect applyAspect(const QRect &viewport);
+
+    struct Parameter
+    {
+        bool operator==(const Parameter &other)
+        {
+            if (name == other.name &&
+                id   == other.id &&
+                min  == other.min &&
+                max  == other.max &&
+                val  == other.val &&
+                step == other.step &&
+                significant_digits == other.significant_digits)
+                return true;
+            return false;
+        };
+
+        std::string name;
+        std::string id;
+        float min;
+        float max;
+        float val;
+        float step;
+        int significant_digits;
+    };
+
+    virtual void showParametersDialog() {};
+    virtual void shaderChanged() {};
+    virtual void saveParameters(std::string filename) {};
+
+    struct
+    {
+        bool ready;
+        uint8_t *buffer;
+        int width;
+        int height;
+        QImage::Format format;
+        int bytes_per_line;
+        double frame_rate;
+    } output_data;
+
+    QWidget *parent{};
+    QWidget *main_window{};
+    EmuConfig *config{};
+    Throttle throttle_object;
+};

qt/src/EmuCanvasGLX.cpp

@@ -0,0 +1,103 @@
+#include "EmuCanvas.hpp"
+
+EmuCanvas::EmuCanvas()
+{
+    setAttribute(Qt::WA_NoSystemBackground, true);
+    setAttribute(Qt::WA_OpaquePaintEvent, true);
+}
+
+EmuCanvas::~EmuCanvas()
+{
+}
+
+struct drawing_area : QWidget
+{
+  public:
+
+    Window xid = 0;
+    bool ready = false;
+    XSetWindowAttributes xattr;
+    Visual *visual;
+    unsigned int xflags = 0;
+    QWindow *wrapper_window = nullptr;
+    QWidget *wrapper = nullptr;
+
+    drawing_area()
+    {
+    }
+
+    ~drawing_area()
+    {
+    }
+
+    void recreateWindow()
+    {
+        if (xid)
+        {
+            XUnmapWindow(QX11Info::display(), xid);
+            XDestroyWindow(QX11Info::display(), xid);
+            xid = 0;
+        }
+        
+
+        XSetErrorHandler([](Display *dpy, XErrorEvent *event) -> int{
+            char text[4096];
+            XGetErrorText(QX11Info::display(), event->error_code, text, 4096);
+            printf("%s\n", text);
+            return 0;
+        });
+
+        createWinId();
+
+        int xwidth = width() * devicePixelRatio();
+        int xheight = height() * devicePixelRatio();
+
+        printf ("%d %d to %d %d %f\n", width(), height(), xwidth, xheight, devicePixelRatioFScale());
+
+        memset(&xattr, 0, sizeof(XSetWindowAttributes));
+        xattr.background_pixel = 0;
+        xattr.backing_store = 0;
+        xattr.event_mask = ExposureMask;
+        xattr.border_pixel = 0;
+        xflags = CWWidth | CWHeight | CWEventMask | CWBackPixel | CWBorderPixel | CWBackingStore;
+        xid = XCreateWindow(QX11Info::display(), winId(), 0, 0, xwidth, xheight, 0, CopyFromParent, InputOutput, CopyFromParent, xflags, &xattr);
+        XMapWindow(QX11Info::display(), xid);
+        /*wrapper_window = QWindow::fromWinId((WId)xid);
+        wrapper = QWidget::createWindowContainer(wrapper_window, this); */
+    }
+
+    void paintEvent(QPaintEvent *event) override
+    {
+        
+
+        return;
+
+        auto id = winId();
+        
+        XGCValues gcvalues {};
+        gcvalues.background = 0x00ff0000;
+
+        gcvalues.foreground = 0x00ff0000;
+
+        
+        /*
+
+        QPainter paint(this);
+        QImage image((const uchar *)snes9x->GetScreen(), 256, 224, 1024, QImage::Format_RGB16);
+        paint.drawImage(0, 0, image, 0, 0, 256, 224);
+        paint.drawImage(QRect(0, 0, width(), height()), image, QRect(0, 0, 256, 224));
+        paint.end();
+        ready = false; */
+    }
+
+    void draw()
+    {
+        ready = true;
+        update();
+    }
+
+    void resizeEvent(QResizeEvent *event) override
+    {
+        recreateWindow();
+    }
+};

qt/src/EmuCanvasOpenGL.cpp

@@ -0,0 +1,378 @@
+#include "EmuCanvasOpenGL.hpp"
+#include <QtGui/QGuiApplication>
+#include <qpa/qplatformnativeinterface.h>
+#include <QTimer>
+#include <QMessageBox>
+#include "common/video/opengl_context.hpp"
+
+#ifndef _WIN32
+#include "common/video/glx_context.hpp"
+#include "common/video/wayland_egl_context.hpp"
+using namespace QNativeInterface;
+#include <X11/Xlib.h>
+#else
+#include "common/video/wgl_context.hpp"
+#endif
+#include "shaders/glsl.h"
+#include "EmuMainWindow.hpp"
+#include "snes9x_imgui.h"
+#include "imgui_impl_opengl3.h"
+
+static const char *stock_vertex_shader_140 = R"(
+#version 140
+
+in vec2 in_position;
+in vec2 in_texcoord;
+out vec2 texcoord;
+
+void main()
+{
+    gl_Position = vec4(in_position, 0.0, 1.0);
+    texcoord = in_texcoord;
+}
+)";
+
+static const char *stock_fragment_shader_140 = R"(
+#version 140
+
+uniform sampler2D texmap;
+out vec4 fragcolor;
+in vec2 texcoord;
+
+void main()
+{
+    fragcolor = texture(texmap, texcoord);
+}
+)";
+
+EmuCanvasOpenGL::EmuCanvasOpenGL(EmuConfig *config, QWidget *parent, QWidget *main_window)
+    : EmuCanvas(config, parent, main_window)
+{
+    setMinimumSize(256, 224);
+    setUpdatesEnabled(false);
+    setAutoFillBackground(false);
+    setAttribute(Qt::WA_NoSystemBackground, true);
+    setAttribute(Qt::WA_NativeWindow, true);
+    setAttribute(Qt::WA_PaintOnScreen, true);
+    setAttribute(Qt::WA_OpaquePaintEvent);
+
+    createWinId();
+
+    auto timer = new QTimer(this);
+    timer->setSingleShot(true);
+    timer->callOnTimeout([&]{ createContext(); });
+    timer->start();
+}
+
+EmuCanvasOpenGL::~EmuCanvasOpenGL()
+{
+}
+
+void EmuCanvasOpenGL::createStockShaders()
+{
+    stock_program = glCreateProgram();
+
+    GLuint vertex_shader = glCreateShader(GL_VERTEX_SHADER);
+    GLuint fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
+
+    glShaderSource(vertex_shader, 1, &stock_vertex_shader_140, NULL);
+    glShaderSource(fragment_shader, 1, &stock_fragment_shader_140, NULL);
+
+    glCompileShader(vertex_shader);
+    glAttachShader(stock_program, vertex_shader);
+    glCompileShader(fragment_shader);
+    glAttachShader(stock_program, fragment_shader);
+
+    glBindAttribLocation(stock_program, 0, "in_position");
+    glBindAttribLocation(stock_program, 1, "in_texcoord");
+
+    glLinkProgram(stock_program);
+    glUseProgram(stock_program);
+
+    glDeleteShader(vertex_shader);
+    glDeleteShader(fragment_shader);
+}
+
+void EmuCanvasOpenGL::stockShaderDraw()
+{
+    auto viewport = applyAspect(QRect(0, 0, width() * devicePixelRatio(), height() * devicePixelRatio()));
+    glViewport(viewport.x(), viewport.y(), viewport.width(), viewport.height());
+
+    GLint texture_uniform = glGetUniformLocation(stock_program, "texmap");
+    glUniform1i(texture_uniform, 0);
+
+    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+}
+
+static QRect g_viewport;
+static void S9xViewportCallback(int src_width, int src_height,
+                                int viewport_x, int viewport_y,
+                                int viewport_width, int viewport_height,
+                                int *out_x, int *out_y,
+                                int *out_width, int *out_height)
+{
+    *out_x = g_viewport.x();
+    *out_y = g_viewport.y();
+    *out_width = g_viewport.width();
+    *out_height = g_viewport.height();
+}
+
+void EmuCanvasOpenGL::customShaderDraw()
+{
+    auto viewport = applyAspect(QRect(0, 0, width() * devicePixelRatio(), height() * devicePixelRatio()));
+    glViewport(viewport.x(), viewport.y(), viewport.width(), viewport.height());
+    g_viewport = viewport;
+
+    shader->render(texture, output_data.width, output_data.height, viewport.x(), viewport.y(), viewport.width(), viewport.height(), S9xViewportCallback);
+}
+
+void EmuCanvasOpenGL::createContext()
+{
+    if (context)
+        return;
+
+    auto platform = QGuiApplication::platformName();
+    auto pni = QGuiApplication::platformNativeInterface();
+    QGuiApplication::sync();
+#ifndef _WIN32
+    if (platform == "wayland")
+    {
+        auto display = (wl_display *)pni->nativeResourceForWindow("display", windowHandle());
+        auto surface = (wl_surface *)pni->nativeResourceForWindow("surface", main_window->windowHandle());
+        auto wayland_egl_context = new WaylandEGLContext();
+        int s = devicePixelRatio();
+
+        if (!wayland_egl_context->attach(display, surface, { parent->x(), parent->y(), parent->width(), parent->height(), s }))
+            printf("Couldn't attach context to wayland surface.\n");
+
+        context.reset(wayland_egl_context);
+    }
+    else if (platform == "xcb")
+    {
+        auto display = (Display *)pni->nativeResourceForWindow("display", windowHandle());
+        auto xid = (Window)winId();
+
+        auto glx_context = new GTKGLXContext();
+        if (!glx_context->attach(display, xid))
+            printf("Couldn't attach to X11 window.\n");
+
+        context.reset(glx_context);
+    }
+#else
+    auto hwnd = winId();
+    auto wgl_context = new WGLContext();
+    if (!wgl_context->attach((HWND)hwnd))
+    {
+        printf("Couldn't attach to context\n");
+        return;
+    }
+    context.reset(wgl_context);
+#endif
+
+    if (!context->create_context())
+    {
+        printf("Couldn't create OpenGL context.\n");
+    }
+
+    context->make_current();
+    gladLoaderLoadGL();
+
+    if (config->display_messages == EmuConfig::eOnscreen)
+    {
+        auto defaults = S9xImGuiGetDefaults();
+        defaults.font_size = config->osd_size;
+        defaults.spacing = defaults.font_size / 2.4;
+        S9xImGuiInit(&defaults);
+        ImGui_ImplOpenGL3_Init();
+    }
+
+    loadShaders();
+
+    glGenTextures(1, &texture);
+
+    GLuint vao;
+    glGenVertexArrays(1, &vao);
+    glBindVertexArray(vao);
+
+    glGenBuffers(1, &stock_coord_buffer);
+    glBindBuffer(GL_ARRAY_BUFFER, stock_coord_buffer);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * 16, coords, GL_STATIC_DRAW);
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+
+    context->swap_interval(config->enable_vsync ? 1 : 0);
+    QGuiApplication::sync();
+    paintEvent(nullptr);
+}
+
+void EmuCanvasOpenGL::loadShaders()
+{
+    auto endswith = [&](std::string ext) ->bool {
+        return config->shader.rfind(ext) == config->shader.length() - ext.length();
+    };
+    using_shader = true;
+    if (!config->use_shader ||
+        !(endswith(".glslp") || endswith(".slangp")))
+        using_shader = false;
+
+    if (!using_shader)
+    {
+        createStockShaders();
+    }
+    else
+    {
+        setlocale(LC_NUMERIC, "C");
+        shader = std::make_unique<GLSLShader>();
+        if (!shader->load_shader(config->shader.c_str()))
+        {
+            shader.reset();
+            using_shader = false;
+            createStockShaders();
+        }
+        setlocale(LC_NUMERIC, "");
+    }
+}
+
+void EmuCanvasOpenGL::uploadTexture()
+{
+    glActiveTexture(GL_TEXTURE0);
+    glBindTexture(GL_TEXTURE_2D, texture);
+    GLuint filter = config->bilinear_filter ? GL_LINEAR : GL_NEAREST;
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, output_data.bytes_per_line / 2);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB565, output_data.width, output_data.height, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, output_data.buffer);
+}
+
+void EmuCanvasOpenGL::draw()
+{
+    if (!isVisible() || !context)
+        return;
+
+    context->make_current();
+
+    uploadTexture();
+    glActiveTexture(GL_TEXTURE0);
+    glBindTexture(GL_TEXTURE_2D, texture);
+
+    glBindBuffer(GL_ARRAY_BUFFER, stock_coord_buffer);
+    glEnableVertexAttribArray(0);
+    glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
+    glEnableVertexAttribArray(1);
+    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, (const void *)32);
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+
+    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+    glClear(GL_COLOR_BUFFER_BIT);
+
+    if (!using_shader)
+        stockShaderDraw();
+    else
+        customShaderDraw();
+
+    if (S9xImGuiRunning())
+    {
+        ImGui_ImplOpenGL3_NewFrame();
+        if (context->width <= 0)
+            context->width = width() * devicePixelRatioF();
+        if (context->height <= 0)
+            context->height = height() * devicePixelRatioF();
+        if (S9xImGuiDraw(context->width, context->height))
+        {
+            auto *draw_data = ImGui::GetDrawData();
+            ImGui_ImplOpenGL3_RenderDrawData(draw_data);
+        }
+    }
+
+    if (config->speed_sync_method == EmuConfig::eTimer || config->speed_sync_method == EmuConfig::eTimerWithFrameskip)
+        throttle();
+
+    context->swap_buffers();
+
+    if (config->reduce_input_lag)
+        glFinish();
+}
+
+void EmuCanvasOpenGL::resizeEvent(QResizeEvent *event)
+{
+    QWidget::resizeEvent(event);
+
+    if (!context) return;
+
+    auto g = parent->geometry();
+    int s = devicePixelRatio();
+    auto platform = QGuiApplication::platformName();
+#ifndef _WIN32
+    if (QGuiApplication::platformName() == "wayland")
+        ((WaylandEGLContext *)context.get())->resize({ g.x(), g.y(), g.width(), g.height(), s });
+    else if (platform == "xcb")
+        ((GTKGLXContext *)context.get())->resize();
+#endif
+}
+
+void EmuCanvasOpenGL::paintEvent(QPaintEvent *event)
+{
+    // TODO: If emu not running
+    if (!context || !isVisible())
+        return;
+
+    if (output_data.ready)
+    {
+        if (!static_cast<EmuMainWindow *>(main_window)->isActivelyDrawing())
+            draw();
+        return;
+    }
+
+    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+    glClear(GL_COLOR_BUFFER_BIT);
+    context->swap_buffers();
+}
+
+void EmuCanvasOpenGL::deinit()
+{
+    shader_parameters_dialog.reset();
+    context.reset();
+}
+
+void EmuCanvasOpenGL::shaderChanged()
+{
+    shader_parameters_dialog.reset();
+
+    if (shader)
+        shader.reset();
+    else
+        glDeleteProgram(stock_program);
+
+    loadShaders();
+    paintEvent(nullptr);
+}
+
+void EmuCanvasOpenGL::showParametersDialog()
+{
+    if (!using_shader)
+    {
+        QMessageBox::warning(this, tr("OpenGL Driver"), tr("The driver isn't using a specialized shader preset right now."));
+        return;
+    }
+
+    if (shader && shader->param.empty())
+    {
+        QMessageBox::information(this, tr("OpenGL Driver"), tr("This shader preset doesn't offer any configurable parameters."));
+        return;
+    }
+
+    auto parameters = reinterpret_cast<std::vector<EmuCanvas::Parameter> *>(&shader->param);
+
+    if (!shader_parameters_dialog)
+        shader_parameters_dialog =
+            std::make_unique<ShaderParametersDialog>(this, parameters);
+
+    shader_parameters_dialog->show();
+}
+
+void EmuCanvasOpenGL::saveParameters(std::string filename)
+{
+    if (shader)
+        shader->save(filename.c_str());
+}

qt/src/EmuCanvasOpenGL.hpp

@@ -0,0 +1,50 @@
+#ifndef __EMU_CANVAS_OPENGL_HPP
+#define __EMU_CANVAS_OPENGL_HPP
+#include <QWindow>
+
+#include "EmuCanvas.hpp"
+#include "ShaderParametersDialog.hpp"
+
+class OpenGLContext;
+class GLSLShader;
+
+class EmuCanvasOpenGL : public EmuCanvas
+{
+  public:
+    EmuCanvasOpenGL(EmuConfig *config, QWidget *parent, QWidget *main_window);
+    ~EmuCanvasOpenGL();
+
+    void deinit() override;
+    void paintEvent(QPaintEvent *event) override;
+    void resizeEvent(QResizeEvent *event) override;
+    QPaintEngine * paintEngine() const override { return nullptr; }
+    void draw() override;
+    void shaderChanged() override;
+    void showParametersDialog() override;
+    void saveParameters(std::string filename) override;
+
+
+  private:
+    void resizeTexture(int width, int height);
+    void createContext();
+    void createStockShaders();
+    void stockShaderDraw();
+    void customShaderDraw();
+    void uploadTexture();
+    void loadShaders();
+
+    unsigned int stock_program;
+    unsigned int texture;
+    unsigned stock_coord_buffer;
+    std::unique_ptr<OpenGLContext> context;
+    bool using_shader;
+    std::unique_ptr<GLSLShader> shader;
+    std::unique_ptr<ShaderParametersDialog> shader_parameters_dialog;
+
+    // The first 8 values are vertices for a triangle strip, the second are texture
+    // coordinates for a stock NPOT texture.
+    const float coords[16] = { -1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, 1.0f, 1.0f,
+                                0.0f,  1.0f, 1.0f,  1.0f,  0.0f, 0.0f, 1.0f, 0.0f, };
+};
+
+#endif

qt/src/EmuCanvasQt.cpp

@@ -0,0 +1,47 @@
+#include "EmuCanvasQt.hpp"
+#include <QGuiApplication>
+#include <QtEvents>
+
+EmuCanvasQt::EmuCanvasQt(EmuConfig *config, QWidget *parent, QWidget *main_window)
+    : EmuCanvas(config, parent, main_window)
+{
+    setMinimumSize(256, 224);
+}
+
+EmuCanvasQt::~EmuCanvasQt()
+{
+    deinit();
+}
+
+void EmuCanvasQt::deinit()
+{
+}
+
+void EmuCanvasQt::draw()
+{
+    QWidget::repaint(0, 0, width(), height());
+    throttle();
+}
+
+void EmuCanvasQt::paintEvent(QPaintEvent *event)
+{
+    // TODO: If emu not running
+    if (!output_data.ready)
+    {
+        QPainter paint(this);
+        paint.fillRect(QRect(0, 0, width(), height()), QBrush(QColor(0, 0, 0)));
+        return;
+    }
+
+    QPainter paint(this);
+    QImage image((const uchar *)output_data.buffer, output_data.width, output_data.height, output_data.bytes_per_line, output_data.format);
+    paint.setRenderHint(QPainter::SmoothPixmapTransform, config->bilinear_filter);
+    QRect dest = { 0, 0, width(), height() };
+    if (config->maintain_aspect_ratio)
+    {
+        paint.fillRect(QRect(0, 0, width(), height()), QBrush(QColor(0, 0, 0)));
+        dest = applyAspect(dest);
+    }
+
+    paint.drawImage(dest, image, QRect(0, 0, output_data.width, output_data.height));
+}

qt/src/EmuCanvasQt.hpp

@@ -0,0 +1,20 @@
+#ifndef __EMU_CANVAS_QT_HPP
+#define __EMU_CANVAS_QT_HPP
+
+#include "EmuCanvas.hpp"
+
+#include <QPainter>
+
+class EmuCanvasQt : public EmuCanvas
+{
+  public:
+    EmuCanvasQt(EmuConfig *config, QWidget *parent, QWidget *main_window);
+    ~EmuCanvasQt();
+
+    virtual void deinit() override;
+    virtual void draw() override;
+
+    void paintEvent(QPaintEvent *event) override;
+};
+
+#endif

qt/src/EmuCanvasVulkan.cpp

@@ -0,0 +1,305 @@
+#include <QtGui/QGuiApplication>
+#include <qpa/qplatformnativeinterface.h>
+#include <QTimer>
+#include <QtEvents>
+#include <QMessageBox>
+#include "EmuCanvasVulkan.hpp"
+#include "src/ShaderParametersDialog.hpp"
+#include "EmuMainWindow.hpp"
+
+#include "snes9x_imgui.h"
+#include "imgui_impl_vulkan.h"
+
+using namespace QNativeInterface;
+
+EmuCanvasVulkan::EmuCanvasVulkan(EmuConfig *config, QWidget *parent, QWidget *main_window)
+    : EmuCanvas(config, parent, main_window)
+{
+    setMinimumSize(256, 224);
+    setUpdatesEnabled(false);
+    setAutoFillBackground(false);
+    setAttribute(Qt::WA_NoSystemBackground, true);
+    setAttribute(Qt::WA_NativeWindow, true);
+    setAttribute(Qt::WA_PaintOnScreen, true);
+    setAttribute(Qt::WA_OpaquePaintEvent);
+
+    createWinId();
+    window = windowHandle();
+
+    auto timer = new QTimer(this);
+    timer->setSingleShot(true);
+    timer->callOnTimeout([&]{ createContext(); });
+    timer->start();
+}
+
+EmuCanvasVulkan::~EmuCanvasVulkan()
+{
+    deinit();
+}
+
+bool EmuCanvasVulkan::initImGui()
+{
+    auto defaults = S9xImGuiGetDefaults();
+    defaults.font_size = config->osd_size;
+    defaults.spacing = defaults.font_size / 2.4;
+    S9xImGuiInit(&defaults);
+
+    ImGui_ImplVulkan_LoadFunctions([](const char *function, void *instance) {
+        return VULKAN_HPP_DEFAULT_DISPATCHER.vkGetInstanceProcAddr(*((VkInstance *)instance), function);
+    }, &context->instance.get());
+
+    vk::DescriptorPoolSize pool_sizes[] =
+    {
+        { vk::DescriptorType::eCombinedImageSampler, 1000 },
+        { vk::DescriptorType::eUniformBuffer, 1000 }
+    };
+    auto descriptor_pool_create_info = vk::DescriptorPoolCreateInfo{}
+        .setPoolSizes(pool_sizes)
+        .setMaxSets(1000)
+        .setFlags(vk::DescriptorPoolCreateFlagBits::eFreeDescriptorSet);
+    imgui_descriptor_pool = context->device.createDescriptorPoolUnique(descriptor_pool_create_info);
+
+    ImGui_ImplVulkan_InitInfo init_info{};
+    init_info.Instance = context->instance.get();
+    init_info.PhysicalDevice = context->physical_device;
+    init_info.Device = context->device;;
+    init_info.QueueFamily = context->graphics_queue_family_index;
+    init_info.Queue = context->queue;
+    init_info.DescriptorPool = imgui_descriptor_pool.get();
+    init_info.Subpass = 0;
+    init_info.MinImageCount = context->swapchain->get_num_frames();
+    init_info.ImageCount = context->swapchain->get_num_frames();
+    init_info.MSAASamples = VK_SAMPLE_COUNT_1_BIT;
+    ImGui_ImplVulkan_Init(&init_info, context->swapchain->get_render_pass());
+
+    auto cmd = context->begin_cmd_buffer();
+    ImGui_ImplVulkan_CreateFontsTexture(cmd);
+    context->end_cmd_buffer();
+    context->wait_idle();
+
+    return true;
+}
+
+void EmuCanvasVulkan::createContext()
+{
+    if (simple_output)
+        return;
+
+    platform = QGuiApplication::platformName();
+    auto pni = QGuiApplication::platformNativeInterface();
+    setVisible(true);
+    QGuiApplication::sync();
+
+    context = std::make_unique<Vulkan::Context>();
+
+#ifdef _WIN32
+    auto hwnd = (HWND)winId();
+    context->init_win32(nullptr, hwnd, config->display_device_index);
+#else
+    if (platform == "wayland")
+    {
+        wayland_surface = std::make_unique<WaylandSurface>();
+        auto display = (wl_display *)pni->nativeResourceForWindow("display", window);
+        auto surface = (wl_surface *)pni->nativeResourceForWindow("surface", main_window->windowHandle());
+        wayland_surface->attach(display, surface, { parent->x(), parent->y(), width(), height(), static_cast<int>(devicePixelRatio()) });
+        auto [scaled_width, scaled_height] = wayland_surface->get_size();
+        context->init_wayland(display, wayland_surface->child, scaled_width, scaled_height, config->display_device_index);
+    }
+    else if (platform == "xcb")
+    {
+        auto display = (Display *)pni->nativeResourceForWindow("display", window);
+        auto xid = (Window)winId();
+
+        context->init_Xlib(display, xid, config->display_device_index);
+    }
+#endif
+
+    if (config->display_messages == EmuConfig::eOnscreen)
+        initImGui();
+
+    tryLoadShader();
+
+    QGuiApplication::sync();
+    paintEvent(nullptr);
+}
+
+void EmuCanvasVulkan::tryLoadShader()
+{
+    simple_output.reset();
+    shader_chain.reset();
+    shader_parameters_dialog.reset();
+
+    if (config->use_shader && !config->shader.empty())
+    {
+        shader_chain = std::make_unique<Vulkan::ShaderChain>(context.get());
+        setlocale(LC_NUMERIC, "C");
+        current_shader = config->shader;
+        if (!shader_chain->load_shader_preset(config->shader))
+        {
+            printf("Couldn't load shader preset: %s\n", config->shader.c_str());
+            shader_chain.reset();
+        }
+        setlocale(LC_NUMERIC, "");
+    }
+
+    if (!shader_chain)
+        simple_output = std::make_unique<Vulkan::SimpleOutput>(context.get(), vk::Format::eR5G6B5UnormPack16);
+}
+
+void EmuCanvasVulkan::shaderChanged()
+{
+    if (!config->use_shader)
+        current_shader.clear();
+
+    if ((!config->use_shader && shader_chain) ||
+        (config->use_shader && current_shader != config->shader))
+        tryLoadShader();
+}
+
+
+void EmuCanvasVulkan::draw()
+{
+    if (!context)
+        return;
+    if (!window->isVisible())
+        return;
+
+    if (S9xImGuiDraw(width() * devicePixelRatioF(), height() * devicePixelRatioF()))
+    {
+        auto draw_data = ImGui::GetDrawData();
+        context->swapchain->on_render_pass_end([&, draw_data] {
+            ImGui_ImplVulkan_RenderDrawData(draw_data, context->swapchain->get_cmd());
+        });
+    }
+
+    auto viewport = applyAspect(QRect(0, 0, width() * devicePixelRatio(), height() * devicePixelRatio()));
+
+    bool retval = false;
+    if (shader_chain)
+    {
+        retval = shader_chain->do_frame_without_swap(output_data.buffer, output_data.width, output_data.height, output_data.bytes_per_line, vk::Format::eR5G6B5UnormPack16, viewport.x(), viewport.y(), viewport.width(), viewport.height());
+    }
+    else if (simple_output)
+    {
+        simple_output->set_filter(config->bilinear_filter);
+        retval = simple_output->do_frame_without_swap(output_data.buffer, output_data.width, output_data.height, output_data.bytes_per_line, viewport.x(), viewport.y(), viewport.width(), viewport.height());
+    }
+
+    if (retval)
+    {
+        throttle();
+        context->swapchain->swap();
+        if (config->reduce_input_lag)
+            context->wait_idle();
+    }
+}
+
+void EmuCanvasVulkan::resizeEvent(QResizeEvent *event)
+{
+    QWidget::resizeEvent(event);
+
+    if (!context)
+        return;
+
+    int width = event->size().width();
+    int height = event->size().height();
+
+    context->swapchain->set_vsync(config->enable_vsync);
+
+#ifndef _WIN32
+    if (platform == "wayland")
+    {
+        wayland_surface->resize({ parent->x(), parent->y(), width, height, (int)devicePixelRatio() });
+        std::tie(width, height) = wayland_surface->get_size();
+        // On Wayland, Vulkan WSI provides the buffer for the subsurface,
+        // so we have to specify a width and height instead of polling the parent.
+        context->recreate_swapchain(width, height);
+        return;
+    }
+#endif
+
+    context->recreate_swapchain(-1, -1);
+}
+
+void EmuCanvasVulkan::paintEvent(QPaintEvent *event)
+{
+    // TODO: If emu not running
+    if (!context || !isVisible())
+        return;
+
+    auto window = (EmuMainWindow *)main_window;
+    if (output_data.ready)
+    {
+        if (!window->isActivelyDrawing())
+            draw();
+        return;
+    }
+
+    // Clear to black
+    uint8_t buffer[] = { 0, 0, 0, 0 };
+    if (shader_chain)
+        shader_chain->do_frame(buffer, 1, 1, 1, vk::Format::eR5G6B5UnormPack16, 0, 0, width(), height());
+    if (simple_output)
+        simple_output->do_frame(buffer, 1, 1, 1, 0, 0, width(), height());
+}
+
+void EmuCanvasVulkan::deinit()
+{
+    shader_parameters_dialog.reset();
+
+    if (ImGui::GetCurrentContext())
+    {
+        context->wait_idle();
+        imgui_descriptor_pool.reset();
+        imgui_render_pass.reset();
+        ImGui_ImplVulkan_Shutdown();
+        ImGui::DestroyContext();
+    }
+
+    simple_output.reset();
+    shader_chain.reset();
+    context.reset();
+#ifndef _WIN32
+    wayland_surface.reset();
+#endif
+}
+
+std::vector<std::string> EmuCanvasVulkan::getDeviceList()
+{
+    return Vulkan::Context::get_device_list();
+}
+
+void EmuCanvasVulkan::showParametersDialog()
+{
+    if (!context)
+    {
+        QMessageBox::warning(this, tr("Vulkan Driver"), tr("The vulkan display driver hasn't properly loaded."));
+        return;
+    }
+
+    if (!shader_chain)
+    {
+        QMessageBox::warning(this, tr("Vulkan Driver"), tr("The driver isn't using a specialized shader preset right now."));
+        return;
+    }
+
+    if (shader_chain && shader_chain->preset->parameters.empty())
+    {
+        QMessageBox::information(this, tr("Vulkan Driver"), tr("This shader preset doesn't offer any configurable parameters."));
+        return;
+    }
+
+    auto parameters = reinterpret_cast<std::vector<EmuCanvas::Parameter> *>(&shader_chain->preset->parameters);
+
+    if (!shader_parameters_dialog)
+        shader_parameters_dialog =
+            std::make_unique<ShaderParametersDialog>(this, parameters);
+
+    shader_parameters_dialog->show();
+}
+
+void EmuCanvasVulkan::saveParameters(std::string filename)
+{
+    if (shader_chain && shader_chain->preset)
+        shader_chain->preset->save_to_file(filename);
+}

qt/src/EmuCanvasVulkan.hpp

@@ -0,0 +1,50 @@
+#pragma once
+#include <QWindow>
+
+#include "EmuCanvas.hpp"
+#include "ShaderParametersDialog.hpp"
+#include "../../vulkan/vulkan_simple_output.hpp"
+#include "../../vulkan/vulkan_shader_chain.hpp"
+
+#ifndef _WIN32
+#include "common/video/wayland_surface.hpp"
+#endif
+
+class EmuCanvasVulkan : public EmuCanvas
+{
+  public:
+    EmuCanvasVulkan(EmuConfig *config, QWidget *parent, QWidget *main_window);
+    ~EmuCanvasVulkan();
+
+    void deinit() override;
+    void paintEvent(QPaintEvent *event) override;
+    void resizeEvent(QResizeEvent *event) override;
+    QPaintEngine *paintEngine() const override { return nullptr; }
+
+    std::vector<std::string> getDeviceList() override;
+    void shaderChanged() override;
+    void showParametersDialog() override;
+    void saveParameters(std::string filename) override;
+
+    void draw() override;
+
+    bool initImGui();
+    vk::UniqueRenderPass imgui_render_pass;
+    vk::UniqueDescriptorPool imgui_descriptor_pool;
+
+    std::unique_ptr<Vulkan::Context> context;
+    std::unique_ptr<Vulkan::SimpleOutput> simple_output;
+    std::unique_ptr<Vulkan::ShaderChain> shader_chain;
+
+  private:
+    void createContext();
+    void tryLoadShader();
+    std::string current_shader;
+    QWindow *window = nullptr;
+    std::unique_ptr<ShaderParametersDialog> shader_parameters_dialog = nullptr;
+    QString platform;
+
+#ifndef _WIN32
+    std::unique_ptr<WaylandSurface> wayland_surface;
+#endif
+};

qt/src/EmuConfig.cpp

@@ -0,0 +1,560 @@
+#include <cstdio>
+#include <string>
+#define TOML_LARGE_FILES 1
+#define TOML_IMPLEMENTATION 1
+#include <fstream>
+#include "toml.hpp"
+#include <filesystem>
+namespace fs = std::filesystem;
+
+#include "EmuConfig.hpp"
+#include "EmuBinding.hpp"
+#include <functional>
+
+static const char *shortcut_names[] =
+{
+    "OpenROM",
+    "EmuTurbo",
+    "ToggleEmuTurbo",
+    "PauseContinue",
+    "SoftReset",
+    "Reset",
+    "Quit",
+    "ToggleFullscreen",
+    "Screenshot",
+    "SaveSPC",
+    "SaveState",
+    "LoadState",
+    "IncreaseSlot",
+    "DecreaseSlot",
+    "QuickSave000",
+    "QuickSave001",
+    "QuickSave002",
+    "QuickSave003",
+    "QuickSave004",
+    "QuickSave005",
+    "QuickSave006",
+    "QuickSave007",
+    "QuickSave008",
+    "QuickSave009",
+    "QuickLoad000",
+    "QuickLoad001",
+    "QuickLoad002",
+    "QuickLoad003",
+    "QuickLoad004",
+    "QuickLoad005",
+    "QuickLoad006",
+    "QuickLoad007",
+    "QuickLoad008",
+    "QuickLoad009",
+    "Rewind",
+    "GrabMouse",
+    "SwapControllers1and2",
+    "ToggleBG0",
+    "ToggleBG1",
+    "ToggleBG2",
+    "ToggleBG3",
+    "ToggleSprites",
+    "ToggleBackdrop",
+    "SoundChannel0",
+    "SoundChannel1",
+    "SoundChannel2",
+    "SoundChannel3",
+    "SoundChannel4",
+    "SoundChannel5",
+    "SoundChannel6",
+    "SoundChannel7",
+    "SoundChannelsOn",
+    "BeginRecordingMovie",
+    "EndRecordingMovie",
+    "SeekToFrame",
+};
+
+static const char *default_controller_keys[] =
+{
+    "Keyboard Ctrl+o", //    eOpenROM
+    "Keyboard Tab", //    eFastForward
+    "Keyboard `", //    eToggleFastForward
+    "Keyboard p", //    ePauseContinue
+    "Keyboard Ctrl+r", //    eSoftReset
+    "", //    ePowerCycle
+    "Keyboard Ctrl+q", //    eQuit
+    "Keyboard F11", //    eToggleFullscreen
+    "", //    eSaveScreenshot
+    "", //    eSaveSPC
+    "Keyboard F2", //    eSaveState
+    "Keyboard F4", //    eLoadState
+    "Keyboard F6", //    eIncreaseSlot
+    "Keyboard F5", //    eDecreaseSlot
+    "Keyboard 0", //    eSaveState0
+    "Keyboard 1", //    eSaveState1
+    "Keyboard 2", //    eSaveState2
+    "Keyboard 3", //    eSaveState3
+    "Keyboard 4", //    eSaveState4
+    "Keyboard 5", //    eSaveState5
+    "Keyboard 6", //    eSaveState6
+    "Keyboard 7", //    eSaveState7
+    "Keyboard 8", //    eSaveState8
+    "Keyboard 9", //    eSaveState9
+    "Keyboard Ctrl+0", //    eLoadState0
+    "Keyboard Ctrl+1", //    eLoadState1
+    "Keyboard Ctrl+2", //    eLoadState2
+    "Keyboard Ctrl+3", //    eLoadState3
+    "Keyboard Ctrl+4", //    eLoadState4
+    "Keyboard Ctrl+5", //    eLoadState5
+    "Keyboard Ctrl+6", //    eLoadState6
+    "Keyboard Ctrl+7", //    eLoadState7
+    "Keyboard Ctrl+8", //    eLoadState8
+    "Keyboard Ctrl+9", //    eLoadState9
+    "", //    eRewind
+    "Keyboard Ctrl+g", //    eGrabMouse
+    "", //    eSwapControllers1and2
+    "", //    eToggleBG0
+    "", //    eToggleBG1
+    "", //    eToggleBG2
+    "", //    eToggleBG3
+    "", //    eToggleSprites
+    "", //    eChangeBackdrop
+    "", //    eToggleSoundChannel1
+    "", //    eToggleSoundChannel2
+    "", //    eToggleSoundChannel3
+    "", //    eToggleSoundChannel4
+    "", //    eToggleSoundChannel5
+    "", //    eToggleSoundChannel6
+    "", //    eToggleSoundChannel7
+    "", //    eToggleSoundChannel8
+    "", //    eToggleAllSoundChannels
+    "", //    eStartRecording
+    "", //    eStopRecording
+    ""
+};
+
+const char **EmuConfig::getDefaultShortcutKeys()
+{
+    return default_controller_keys;
+}
+
+const char **EmuConfig::getShortcutNames()
+{
+    return shortcut_names;
+}
+
+std::string EmuConfig::findConfigDir()
+{
+    char *dir;
+    fs::path path;
+
+    if ((dir = getenv("XDG_CONFIG_HOME")))
+    {
+        path = dir;
+        path /= "snes9x";
+    }
+    else if ((dir = getenv("HOME")))
+    {
+        path = dir;
+        path /= ".config/snes9x";
+    }
+    else
+    {
+        path = "./.snes9x";
+    }
+
+    if (!fs::exists(path))
+        fs::create_directory(path);
+
+    return path.string();
+}
+
+std::string EmuConfig::findConfigFile()
+{
+    fs::path path(findConfigDir());
+    path /= "snes9x-qt.conf";
+    return path.string();
+}
+
+void EmuConfig::setDefaults(int section)
+{
+    if (section == -1 || section == 0)
+    {
+        // General
+        fullscreen_on_open = false;
+        disable_screensaver = true;
+        pause_emulation_when_unfocused = true;
+
+        show_frame_rate = false;
+        show_indicators = true;
+        show_pressed_keys = false;
+        show_time = false;
+    }
+
+    if (section == -1 || section == 1)
+    {
+        // Display
+        display_driver = {};
+        display_device_index = 0;
+        enable_vsync = true;
+        ;
+        bilinear_filter = true;
+        ;
+        reduce_input_lag = true;
+        adjust_for_vrr = false;
+        use_shader = false;
+        shader = {};
+        last_shader_folder = {};
+
+        scale_image = true;
+        ;
+        maintain_aspect_ratio = true;
+        use_integer_scaling = false;
+        aspect_ratio_numerator = 4;
+        aspect_ratio_denominator = 3;
+        show_overscan = false;
+        high_resolution_effect = eLeaveAlone;
+
+        software_filter = {};
+
+        display_messages = eOnscreen;
+        osd_size = 24;
+    }
+
+    if (section == -1 || section == 2)
+    {
+        // Sound
+        sound_driver = {};
+        sound_device = {};
+        playback_rate = 48000;
+        audio_buffer_size_ms = 64;
+
+        adjust_input_rate_automatically = true;
+        input_rate = 31979;
+        dynamic_rate_control = false;
+        dynamic_rate_limit = 0.005;
+        mute_audio = false;
+        mute_audio_during_alternate_speed = false;
+    }
+
+    if (section == -1 || section == 3)
+    {
+        speed_sync_method = eTimer;
+        fixed_frame_rate = 0.0;
+        fast_forward_skip_frames = 9;
+
+        rewind_buffer_size = 0;
+        rewind_frame_interval = 5;
+
+        allow_invalid_vram_access = false;
+        allow_opposing_dpad_directions = false;
+        overclock = false;
+        remove_sprite_limit = false;
+        enable_shadow_buffer = false;
+        superfx_clock_multiplier = 100;
+        sound_filter = eGaussian;
+    }
+
+    if (section == -1 || section == 4)
+    {
+        // Controllers
+        memset(binding.controller, 0, sizeof(binding.controller));
+
+        const char *button_list[] = { "Up", "Down", "Left", "Right", "d", "c", "s", "x", "z", "a", "Return", "Space" };
+        for (int i = 0; i < std::size(button_list); i++)
+        {
+            binding.controller[0].buttons[i * 4] = EmuBinding::from_config_string("Keyboard " + std::string(button_list[i]));
+        }
+    }
+
+    if (section == -1 || section == 5)
+    {
+        // Shortcuts
+        memset(binding.shortcuts, 0, sizeof(binding.shortcuts));
+        for (auto i = 0; i < num_shortcuts; i++)
+        {
+            binding.shortcuts[i * 4] = EmuBinding::from_config_string(getDefaultShortcutKeys()[i]);
+        }
+    }
+
+    if (section == -1 || section == 6)
+    {
+        // Files
+        sram_folder = {};
+        state_folder = {};
+        cheat_folder = {};
+        patch_folder = {};
+        export_folder = {};
+
+        sram_location = eROMDirectory;
+        state_location = eROMDirectory;
+        cheat_location = eROMDirectory;
+        patch_location = eROMDirectory;
+        export_location = eROMDirectory;
+    }
+}
+
+void EmuConfig::config(std::string filename, bool write)
+{
+    toml::table root;
+    toml::table *table = nullptr;
+    std::string section;
+
+    std::function<void(std::string, bool &)> Bool;
+    std::function<void(std::string, int &)> Int;
+    std::function<void(std::string, std::string &)> String;
+    std::function<void(std::string, int &, std::vector<const char *>)> Enum;
+    std::function<void(std::string, double &)> Double;
+    std::function<void(std::string, EmuBinding &)> Binding;
+    std::function<void(std::string)> BeginSection;
+    std::function<void()> EndSection;
+
+    if (write)
+    {
+        Bool = [&](std::string key, bool &value) {
+            table->insert_or_assign(key, value);
+        };
+        Int = [&](std::string key, int &value) {
+            table->insert_or_assign(key, value);
+        };
+        String = [&](std::string key, std::string &value) {
+            table->insert_or_assign(key, value);
+        };
+        Enum = [&](std::string key, int &value, std::vector<const char *> map) {
+            table->insert_or_assign(key, map[value]);
+        };
+        Double = [&](std::string key, double &value) {
+            table->insert_or_assign(key, value);
+        };
+        Binding = [&](std::string key, EmuBinding &binding) {
+            table->insert_or_assign(key, binding.to_config_string());
+        };
+        BeginSection = [&](std::string str) {
+            section = str;
+            table = new toml::table;
+        };
+
+        EndSection = [&]() {
+            root.insert_or_assign(section, *table);
+            delete table;
+        };
+
+        root.clear();
+    }
+    else
+    {
+        Bool = [&](std::string key, bool &value) {
+            if (table && table->contains(key) && table->get(key)->is_boolean())
+                value = table->get(key)->as_boolean()->get();
+        };
+        Int = [&](std::string key, int &value) {
+            if (table && table->contains(key) && table->get(key)->is_integer())
+                value = table->get(key)->as_integer()->get();
+        };
+        String = [&](std::string key, std::string &value) {
+            if (table && table->contains(key) && table->get(key)->is_string())
+                value = table->get(key)->as_string()->get();
+        };
+        Binding = [&](std::string key, EmuBinding &binding) {
+            if (table && table->contains(key) && table->get(key)->is_string())
+                binding = EmuBinding::from_config_string(table->get(key)->as_string()->get());
+        };
+        Double = [&](std::string key, double &value) {
+            if (table && table->contains(key) && table->get(key)->is_floating_point())
+                value = table->get(key)->as_floating_point()->get();
+        };
+        Enum = [&](std::string key, int &value, std::vector<const char *> map) {
+            std::string entry;
+
+            if (table && table->contains(key) && table->get(key)->is_string())
+                entry = table->get(key)->as_string()->get();
+            else
+                return;
+
+            auto tolower = [](std::string str) -> std::string {
+                for (auto &c : str)
+                    if (c >= 'A' && c <= 'Z')
+                        c += ('a' - 'A');
+                return str;
+            };
+
+            entry = tolower(entry);
+            for (size_t i = 0; i < map.size(); i++)
+            {
+                if (tolower(map[i]) == entry)
+                {
+                    value = i;
+                    return;
+                }
+            }
+        };
+        BeginSection = [&](std::string str) {
+            section = str;
+            auto root_section = root.get(section);
+            if (root_section)
+                table = root_section->as_table();
+            else
+                table = nullptr;
+        };
+        EndSection = [&]() {
+        };
+
+        auto parse_result = toml::parse_file(filename);
+        if (parse_result.failed())
+            return;
+        root = std::move(parse_result.table());
+    }
+
+    BeginSection("Operational");
+    String("LastROMFolder", last_rom_folder);
+    Int("MainWindowWidth", main_window_width);
+    Int("MainWindowHeight", main_window_height);
+    int recent_count = recently_used.size();
+    Int("RecentlyUsedEntries", recent_count);
+    if (!write)
+        recently_used.resize(recent_count);
+    for (int i = 0; i < recent_count; i++)
+    {
+        String("RecentlyUsed" + std::to_string(i), recently_used[i]);
+    }
+    EndSection();
+
+    BeginSection("General");
+    Bool("FullscreenOnOpen", fullscreen_on_open);
+    Bool("DisableScreensaver", disable_screensaver);
+    Bool("PauseEmulationWhenUnfocused", pause_emulation_when_unfocused);
+
+    Bool("ShowFrameRate", show_frame_rate);
+    Bool("ShowIndicators", show_indicators);
+    Bool("ShowPressedKeys", show_pressed_keys);
+    Bool("ShowTime", show_time);
+    EndSection();
+
+    BeginSection("Display");
+    String("DisplayDriver", display_driver);
+    Int("DisplayDevice", display_device_index);
+    Bool("VSync", enable_vsync);
+    Bool("ReduceInputLag", reduce_input_lag);
+    Bool("BilinearFilter", bilinear_filter);
+    Bool("AdjustForVRR", adjust_for_vrr);
+    Bool("UseShader", use_shader);
+    String("Shader", shader);
+    String("LastShaderFolder", last_shader_folder);
+
+    Bool("ScaleImage", scale_image);
+    Bool("MaintainAspectRatio", maintain_aspect_ratio);
+    Bool("UseIntegerScaling", use_integer_scaling);
+    Int("AspectRatioNumerator", aspect_ratio_numerator);
+    Int("AspectRatioDenominator", aspect_ratio_denominator);
+    Bool("ShowOverscan", show_overscan);
+    Enum("HighResolutionEffect", high_resolution_effect, { "LeaveAlone", "ScaleDown", "ScaleUp" });
+
+    String("SoftwareFilter", software_filter);
+
+    Enum("DisplayMessages", display_messages, { "Onscreen", "Inscreen", "None" });
+    Int("OSDSize", osd_size);
+    EndSection();
+
+    BeginSection("Sound");
+    String("SoundDriver", sound_driver);
+    String("SoundDevice", sound_device);
+    Int("PlaybackRate", playback_rate);
+    Int("BufferSize", audio_buffer_size_ms);
+    Bool("AdjustInputRateAutomatically", adjust_input_rate_automatically);
+    Int("InputRate", input_rate);
+    Bool("DynamicRateControl", dynamic_rate_control);
+    Double("DynamicRateLimit", dynamic_rate_limit);
+    Bool("Mute", mute_audio);
+    Bool("MuteAudioDuringAlternateSpeed", mute_audio_during_alternate_speed);
+    EndSection();
+
+    BeginSection("Emulation");
+    Enum("SpeedSyncMethod", speed_sync_method, { "Timer", "TimerFrameskip", "SoundSync", "Unlimited" });
+    Double("FixedFrameRate", fixed_frame_rate);
+    Int("FastForwardSkipFrames", fast_forward_skip_frames);
+    Int("RewindBufferSize", rewind_buffer_size);
+    Int("RewindFrameInterval", rewind_frame_interval);
+    Bool("AllowInvalidVRAMAccess", allow_invalid_vram_access);
+    Bool("AllowOpposingDpadDirections", allow_opposing_dpad_directions);
+    Bool("Overclock", overclock);
+    Bool("RemoveSpriteLimit", remove_sprite_limit);
+    Bool("EnableShadowBuffer", enable_shadow_buffer);
+    Int("SuperFXClockMultiplier", superfx_clock_multiplier);
+    Enum("SoundFilter", sound_filter, { "Gaussian", "Nearest", "Linear", "Cubic", "Sinc" });
+    EndSection();
+
+    const char *names[] = { "Up", "Down", "Left", "Right", "A", "B", "X", "Y", "L", "R", "Start", "Select", "Turbo A", "Turbo B", "Turbo X", "Turbo Y", "Turbo L", "Turbo R" };
+    for (int c = 0; c < 5; c++)
+    {
+        BeginSection("Controller " + std::to_string(c));
+
+        for (int y = 0; y < num_controller_bindings; y++)
+            for (int x = 0; x < allowed_bindings; x++)
+            {
+                std::string keyname = names[y] + std::to_string(x);
+                Binding(keyname, binding.controller[c].buttons[y * allowed_bindings + x]);
+            }
+
+        EndSection();
+    }
+
+    BeginSection("Shortcuts");
+    for (int i = 0; i < num_shortcuts; i++)
+    {
+        Binding(getShortcutNames()[i] + std::to_string(0), binding.shortcuts[i * 4]);
+        Binding(getShortcutNames()[i] + std::to_string(1), binding.shortcuts[i * 4 + 1]);
+        Binding(getShortcutNames()[i] + std::to_string(2), binding.shortcuts[i * 4 + 2]);
+        Binding(getShortcutNames()[i] + std::to_string(3), binding.shortcuts[i * 4 + 3]);
+    }
+    EndSection();
+
+    BeginSection("Files");
+    Enum("SRAMLocation", sram_location, { "ROMDirectory", "ConfigDirectory", "Custom" });
+    Enum("StateLocation", state_location, { "ROMDirectory", "ConfigDirectory", "Custom" });
+    Enum("CheatLocation", cheat_location, { "ROMDirectory", "ConfigDirectory", "Custom" });
+    Enum("PatchLocation", patch_location, { "ROMDirectory", "ConfigDirectory", "Custom" });
+    Enum("ExportLocation", export_location, { "ROMDirectory", "ConfigDirectory", "Custom" });
+
+    String("SRAMFolder", sram_folder);
+    String("StateFolder", state_folder);
+    String("CheatFolder", cheat_folder);
+    String("PatchFolder", patch_folder);
+    String("ExportFolder", export_folder);
+
+    Int("SRAMSaveInterval", sram_save_interval);
+    EndSection();
+
+    if (write)
+    {
+        std::ofstream ofs(filename);
+        ofs << root;
+        ofs.close();
+    }
+}
+
+void EmuConfig::setVRRConfig(bool enable)
+{
+    if (enable == vrr_enabled)
+        return;
+
+    if (!adjust_for_vrr && enable)
+        return;
+
+    vrr_enabled = enable;
+
+    if (enable)
+    {
+        saved_fixed_frame_rate = fixed_frame_rate;
+        saved_input_rate = input_rate;
+        saved_speed_sync_method = speed_sync_method;
+        saved_enable_vsync = enable_vsync;
+
+        fixed_frame_rate = 0.0;
+        input_rate = 32040;
+        enable_vsync = true;
+        speed_sync_method = eTimer;
+    }
+    else
+    {
+        fixed_frame_rate = saved_fixed_frame_rate;
+        input_rate = saved_input_rate;
+        speed_sync_method = saved_speed_sync_method;
+        enable_vsync = saved_enable_vsync;
+    }
+}

qt/src/EmuConfig.hpp

@@ -0,0 +1,224 @@
+#ifndef __EMU_CONFIG_HPP
+#define __EMU_CONFIG_HPP
+
+#include <string>
+#include "EmuBinding.hpp"
+
+struct EmuConfig
+{
+    static std::string findConfigFile();
+    static std::string findConfigDir();
+    void setDefaults(int section = -1);
+    void config(std::string filename, bool write);
+    void loadFile(std::string filename)
+    {
+        config(filename, false);
+    }
+    void saveFile(std::string filename)
+    {
+        config(filename, true);
+    }
+    void setVRRConfig(bool enable = true);
+    bool vrr_enabled = false;
+    int saved_input_rate = 0;
+    double saved_fixed_frame_rate = 0.0;
+    int saved_speed_sync_method = 0;
+    bool saved_enable_vsync = false;
+
+    // Operational
+    std::string last_rom_folder;
+    int main_window_width = 0;
+    int main_window_height = 0;
+    std::vector<std::string> recently_used;
+
+    // General
+    bool fullscreen_on_open;
+    bool disable_screensaver;
+    bool pause_emulation_when_unfocused;
+
+    bool show_frame_rate;
+    bool show_indicators;
+    bool show_pressed_keys;
+    bool show_time;
+
+    // Display
+    std::string display_driver;
+    int display_device_index;
+    bool enable_vsync;
+    bool bilinear_filter;
+    bool reduce_input_lag;
+    bool adjust_for_vrr;
+    bool use_shader;
+    std::string shader;
+    std::string last_shader_folder;
+
+    bool scale_image;
+    bool maintain_aspect_ratio;
+    bool use_integer_scaling;
+    int aspect_ratio_numerator;
+    int aspect_ratio_denominator;
+    bool show_overscan;
+    enum HighResolutionEffect
+    {
+        eLeaveAlone = 0,
+        eScaleDown = 1,
+        eScaleUp = 2
+    };
+    int high_resolution_effect;
+
+    std::string software_filter;
+
+    enum DisplayMessages
+    {
+        eOnscreen = 0,
+        eInscreen = 1,
+        eNone = 2
+    };
+    int display_messages;
+    int osd_size;
+
+    // Sound
+    std::string sound_driver;
+    std::string sound_device;
+    int playback_rate;
+    int audio_buffer_size_ms;
+
+    bool adjust_input_rate_automatically;
+    int input_rate;
+    bool dynamic_rate_control;
+    double dynamic_rate_limit;
+    bool mute_audio;
+    bool mute_audio_during_alternate_speed;
+
+    // Emulation
+
+    enum SpeedSyncMethod
+    {
+        eTimer = 0,
+        eTimerWithFrameskip = 1,
+        eSoundSync = 2,
+        eUnlimited = 3
+    };
+    int speed_sync_method;
+    double fixed_frame_rate;
+    int fast_forward_skip_frames;
+
+    int rewind_buffer_size;
+    int rewind_frame_interval;
+
+    // Emulation/Hacks
+
+    bool allow_invalid_vram_access;
+    bool allow_opposing_dpad_directions;
+    bool overclock;
+    bool remove_sprite_limit;
+    bool enable_shadow_buffer;
+    int superfx_clock_multiplier;
+    enum SoundFilter
+    {
+        eNearest = 0,
+        eLinear = 1,
+        eGaussian = 2,
+        eCubic = 3,
+        eSinc = 4
+    };
+    int sound_filter;
+
+    // Files
+    enum FileLocation
+    {
+        eROMDirectory = 0,
+        eConfigDirectory = 1,
+        eCustomDirectory = 2
+    };
+    int sram_location;
+    int state_location;
+    int cheat_location;
+    int patch_location;
+    int export_location;
+    std::string sram_folder;
+    std::string state_folder;
+    std::string cheat_folder;
+    std::string patch_folder;
+    std::string export_folder;
+
+    int sram_save_interval;
+
+    static const int allowed_bindings = 4;
+    static const int num_controller_bindings = 18;
+    static const int num_shortcuts = 55;
+
+    struct
+    {
+        struct
+        {
+            EmuBinding buttons[num_controller_bindings * allowed_bindings];
+        } controller[5];
+
+        EmuBinding shortcuts[num_shortcuts * allowed_bindings];
+    } binding;
+
+    static const char **getDefaultShortcutKeys();
+    static const char **getShortcutNames();
+
+    enum Shortcut
+    {
+        eOpenROM = 0,
+        eFastForward,
+        eToggleFastForward,
+        ePauseContinue,
+        eSoftReset,
+        ePowerCycle,
+        eQuit,
+        eToggleFullscreen,
+        eSaveScreenshot,
+        eSaveSPC,
+        eSaveState,
+        eLoadState,
+        eIncreaseSlot,
+        eDecreaseSlot,
+        eSaveState0,
+        eSaveState1,
+        eSaveState2,
+        eSaveState3,
+        eSaveState4,
+        eSaveState5,
+        eSaveState6,
+        eSaveState7,
+        eSaveState8,
+        eSaveState9,
+        eLoadState0,
+        eLoadState1,
+        eLoadState2,
+        eLoadState3,
+        eLoadState4,
+        eLoadState5,
+        eLoadState6,
+        eLoadState7,
+        eLoadState8,
+        eLoadState9,
+        eRewind,
+        eGrabMouse,
+        eSwapControllers1and2,
+        eToggleBG0,
+        eToggleBG1,
+        eToggleBG2,
+        eToggleBG3,
+        eToggleSprites,
+        eChangeBackdrop,
+        eToggleSoundChannel1,
+        eToggleSoundChannel2,
+        eToggleSoundChannel3,
+        eToggleSoundChannel4,
+        eToggleSoundChannel5,
+        eToggleSoundChannel6,
+        eToggleSoundChannel7,
+        eToggleSoundChannel8,
+        eToggleAllSoundChannels,
+        eStartRecording,
+        eStopRecording,
+        eSeekToFrame,
+    };
+};
+
+#endif

qt/src/EmuInputPanel.cpp

@@ -0,0 +1,137 @@
+#include "EmuInputPanel.hpp"
+#include <QFrame>
+#include <QtEvents>
+
+EmuInputBinder::EmuInputBinder(const QString &text, std::vector<EmuBinding> *bindings, int min_label_width)
+{
+    layout = new QHBoxLayout;
+    setLayout(layout);
+    //layout->setMargin(0);
+
+    label = new QLabel(text);
+    layout->addWidget(label);
+    label->setMinimumWidth(min_label_width);
+
+    this->bindings = bindings;
+
+    remove_icon = QIcon::fromTheme("remove");
+    add_icon = QIcon::fromTheme("add");
+
+    auto frame = new QFrame;
+    auto sublayout = new QHBoxLayout;
+    //sublayout->setMargin(2);
+    frame->setContentsMargins(0, 0, 0, 0);
+    frame->setLayout(sublayout);
+    frame->setFrameShape(QFrame::Shape::StyledPanel);
+    frame->setFrameShadow(QFrame::Shadow::Sunken);
+
+    layout->addWidget(frame);
+
+    for (int i = 0; i < 3; i++)
+    {
+        buttons[i] = new QPushButton(this);
+        sublayout->addWidget(buttons[i]);
+        buttons[i]->connect(buttons[i], &QPushButton::clicked, [&, i] {
+            this->bindings->erase(this->bindings->begin() + i);
+            updateDisplay();
+        });
+    }
+
+    add_button = new QPushButton(add_icon, "");
+    add_button->setCheckable(true);
+    add_button->connect(add_button, &QPushButton::toggled, [&](bool checked) {
+        if (checked)
+        {
+            grabKeyboard();
+            if (add_button_func)
+                add_button_func(this);
+        }
+    });
+
+    sublayout->addWidget(add_button);
+    layout->addStretch();
+
+    updateDisplay();
+
+    add_button_func = nullptr;
+}
+
+void EmuInputBinder::reset(const QString &text, std::vector<EmuBinding> *bindings)
+{
+    label->setText(text);
+    this->bindings = bindings;
+}
+
+void EmuInputBinder::keyPressEvent(QKeyEvent *event)
+{
+    releaseKeyboard();
+
+    if (add_button->isChecked() && bindings->size() < 3)
+    {
+        auto key = EmuBinding::keyboard(
+            event->key(),
+            event->modifiers().testFlag(Qt::KeyboardModifier::ShiftModifier),
+            event->modifiers().testFlag(Qt::KeyboardModifier::AltModifier),
+            event->modifiers().testFlag(Qt::KeyboardModifier::ControlModifier),
+            event->modifiers().testFlag(Qt::KeyboardModifier::MetaModifier));
+
+        bool skip = false;
+        for (auto &b : *bindings)
+        {
+            if (b == key)
+            {
+                skip = true;
+            }
+        }
+        if (event->key() == Qt::Key_Escape)
+            skip = true;
+
+        if (!skip)
+        {
+            bindings->push_back(key);
+            updateDisplay();
+        }
+
+        add_button->setChecked(false);
+    }
+}
+
+void EmuInputBinder::untoggleAddButton()
+{
+    add_button->setChecked(false);
+}
+
+void EmuInputBinder::updateDisplay()
+{
+    size_t i;
+    for (i = 0; i < bindings->size(); i++)
+    {
+        QPushButton &b = *buttons[i];
+        b.setIcon(QIcon::fromTheme("remove"));
+        b.setText((*bindings)[i].to_string().c_str());
+        b.show();
+    }
+    for (; i < 3; i++)
+    {
+        buttons[i]->hide();
+    }
+
+    if (bindings->size() >= 3)
+    {
+        add_button->hide();
+    }
+    else
+    {
+        add_button->show();
+    }
+
+}
+
+void EmuInputBinder::connectAddButton(std::function<void (EmuInputBinder *)> func)
+{
+    add_button_func = func;
+}
+
+EmuInputBinder::~EmuInputBinder()
+{
+}

qt/src/EmuInputPanel.hpp

@@ -0,0 +1,38 @@
+#ifndef __EMU_INPUT_PANEL_HPP
+#define __EMU_INPUT_PANEL_HPP
+
+#include <QWidget>
+#include <QBoxLayout>
+#include <QPushButton>
+#include <QLabel>
+
+#include "EmuBinding.hpp"
+
+class EmuInputBinder : public QWidget
+{
+  public:
+    EmuInputBinder(const QString &text, std::vector<EmuBinding> *bindings, int min_label_width = 0);
+    ~EmuInputBinder();
+    void updateDisplay();
+    std::vector<EmuBinding> *bindings;
+    void connectAddButton(std::function<void(EmuInputBinder *)>);
+    void untoggleAddButton();
+    void reset(const QString &text, std::vector<EmuBinding> *bindings);
+
+    void keyPressEvent(QKeyEvent *event) override;
+    
+  private:
+    QLabel *label;
+    QHBoxLayout *layout;
+    QPushButton *buttons[3];
+    QPushButton *add_button;
+    std::function<void(EmuInputBinder *)> add_button_func;
+    QIcon remove_icon;
+    QIcon add_icon;
+};
+
+class EmuInputPanel : QWidget
+{
+};
+
+#endif

qt/src/EmuMainWindow.cpp

@@ -0,0 +1,566 @@
+#include <QTimer>
+#include <QMenu>
+#include <QMenuBar>
+#include <QFileDialog>
+#include <QtWidgets>
+#include <QtEvents>
+#include <QGuiApplication>
+#include <QStackedWidget>
+#include <qpa/qplatformnativeinterface.h>
+
+#include "EmuMainWindow.hpp"
+#include "EmuSettingsWindow.hpp"
+#include "EmuApplication.hpp"
+#include "EmuCanvasVulkan.hpp"
+#include "EmuCanvasOpenGL.hpp"
+#include "EmuCanvasQt.hpp"
+#include "src/ShaderParametersDialog.hpp"
+#undef KeyPress
+
+static EmuSettingsWindow *g_emu_settings_window = nullptr;
+
+EmuMainWindow::EmuMainWindow(EmuApplication *app)
+    : app(app)
+{
+    createWidgets();
+    recreateCanvas();
+    setMouseTracking(true);
+
+    app->qtapp->installEventFilter(this);
+    mouse_timer.setTimerType(Qt::CoarseTimer);
+    mouse_timer.setInterval(1000);
+    mouse_timer.callOnTimeout([&] {
+        if (cursor_visible && isActivelyDrawing())
+        {
+            setCursor(QCursor(Qt::BlankCursor));
+            cursor_visible = false;
+            mouse_timer.stop();
+        }
+    });
+}
+
+EmuMainWindow::~EmuMainWindow()
+{
+}
+
+void EmuMainWindow::destroyCanvas()
+{
+    auto central_widget = centralWidget();
+    if (!central_widget)
+        return;
+
+    if (using_stacked_widget)
+    {
+        auto stackwidget = (QStackedWidget *)central_widget;
+        EmuCanvas *widget = (EmuCanvas *)stackwidget->widget(0);
+        if (widget)
+        {
+            widget->deinit();
+            stackwidget->removeWidget(widget);
+        }
+
+        delete takeCentralWidget();
+    }
+    else
+    {
+        EmuCanvas *widget = (EmuCanvas *)takeCentralWidget();
+        widget->deinit();
+        delete widget;
+    }
+}
+
+void EmuMainWindow::createCanvas()
+{
+    if (app->config->display_driver != "vulkan" &&
+        app->config->display_driver != "opengl" &&
+        app->config->display_driver != "qt")
+        app->config->display_driver = "qt";
+
+#ifndef _WIN32
+    if (QGuiApplication::platformName() == "wayland" && app->config->display_driver != "qt")
+    {
+        auto central_widget = new QStackedWidget();
+
+        if (app->config->display_driver == "vulkan")
+            canvas = new EmuCanvasVulkan(app->config.get(), central_widget, this);
+        else if (app->config->display_driver == "opengl")
+            canvas = new EmuCanvasOpenGL(app->config.get(), central_widget, this);
+
+        central_widget->addWidget(canvas);
+        central_widget->setCurrentWidget(canvas);
+        setCentralWidget(central_widget);
+        using_stacked_widget = true;
+        return;
+    }
+#endif
+
+    if (app->config->display_driver == "vulkan")
+        canvas = new EmuCanvasVulkan(app->config.get(), this, this);
+    else if (app->config->display_driver == "opengl")
+        canvas = new EmuCanvasOpenGL(app->config.get(), this, this);
+    else
+        canvas = new EmuCanvasQt(app->config.get(), this, this);
+
+    setCentralWidget(canvas);
+    using_stacked_widget = false;
+}
+
+void EmuMainWindow::recreateCanvas()
+{
+    destroyCanvas();
+    createCanvas();
+}
+
+void EmuMainWindow::setCoreActionsEnabled(bool enable)
+{
+    for (auto &a : core_actions)
+        a->setEnabled(enable);
+}
+
+void EmuMainWindow::createWidgets()
+{
+    setWindowTitle("Snes9x");
+    setWindowIcon(QIcon::fromTheme("snes9x"));
+
+    // File menu
+    auto file_menu = new QMenu(tr("&File"));
+    auto open_item = file_menu->addAction(QIcon::fromTheme("document-open"), tr("&Open File..."));
+    open_item->connect(open_item, &QAction::triggered, this, [&] {
+        openFile();
+    });
+    // File->Recent Files submenu
+    recent_menu = new QMenu("Recent Files");
+    file_menu->addMenu(recent_menu);
+    populateRecentlyUsed();
+
+    file_menu->addSeparator();
+
+    // File->Load/Save State submenus
+    load_state_menu = new QMenu(tr("&Load State"));
+    save_state_menu = new QMenu(tr("&Save State"));
+    for  (size_t i = 0; i < state_items_size; i++)
+    {
+        auto action = load_state_menu->addAction(tr("Slot &%1").arg(i));
+        connect(action, &QAction::triggered, [&, i] {
+            app->loadState(i);
+        });
+        core_actions.push_back(action);
+
+        action = save_state_menu->addAction(tr("Slot &%1").arg(i));
+        connect(action, &QAction::triggered, [&, i] {
+            app->saveState(i);
+        });
+        core_actions.push_back(action);
+    }
+
+    load_state_menu->addSeparator();
+
+    auto load_state_file_item = load_state_menu->addAction(QIcon::fromTheme("document-open"), tr("From &File..."));
+    connect(load_state_file_item, &QAction::triggered, [&] {
+        this->chooseState(false);
+    });
+    core_actions.push_back(load_state_file_item);
+
+    load_state_menu->addSeparator();
+
+    auto load_state_undo_item = load_state_menu->addAction(QIcon::fromTheme("edit-undo"), tr("&Undo Load State"));
+    connect(load_state_undo_item, &QAction::triggered, [&] {
+        app->core->loadUndoState();
+    });
+    core_actions.push_back(load_state_undo_item);
+
+    file_menu->addMenu(load_state_menu);
+
+    save_state_menu->addSeparator();
+    auto save_state_file_item = save_state_menu->addAction(QIcon::fromTheme("document-save"), tr("To &File..."));
+    connect(save_state_file_item, &QAction::triggered, [&] {
+        this->chooseState(true);
+    });
+    core_actions.push_back(save_state_file_item);
+    file_menu->addMenu(save_state_menu);
+
+    auto exit_item = new QAction(QIcon::fromTheme("application-exit"), tr("E&xit"));
+    exit_item->connect(exit_item, &QAction::triggered, this, [&](bool checked) {
+        close();
+    });
+
+    file_menu->addAction(exit_item);
+    menuBar()->addMenu(file_menu);
+
+    // Emulation Menu
+    auto emulation_menu = new QMenu(tr("&Emulation"));
+
+    auto run_item = emulation_menu->addAction(tr("&Run"));
+    connect(run_item, &QAction::triggered, [&] {
+        if (manual_pause)
+        {
+            manual_pause = false;
+            app->unpause();
+        }
+    });
+    core_actions.push_back(run_item);
+
+    auto pause_item = emulation_menu->addAction(QIcon::fromTheme("media-playback-pause"), tr("&Pause"));
+    connect(pause_item, &QAction::triggered, [&] {
+        if (!manual_pause)
+        {
+            manual_pause = true;
+            app->pause();
+        }
+    });
+    core_actions.push_back(pause_item);
+
+    emulation_menu->addSeparator();
+
+    auto reset_item = emulation_menu->addAction(QIcon::fromTheme("view-refresh"), tr("Rese&t"));
+    connect(reset_item, &QAction::triggered, [&] {
+        app->reset();
+        if (manual_pause)
+        {
+            manual_pause = false;
+            app->unpause();
+        }
+    });
+    core_actions.push_back(reset_item);
+
+    auto hard_reset_item = emulation_menu->addAction(QIcon::fromTheme("process-stop"), tr("&Hard Reset"));
+    connect(hard_reset_item, &QAction::triggered, [&] {
+        app->powerCycle();
+        if (manual_pause)
+        {
+            manual_pause = false;
+            app->unpause();
+        }
+    });
+    core_actions.push_back(hard_reset_item);
+
+    menuBar()->addMenu(emulation_menu);
+
+    // View Menu
+    auto view_menu = new QMenu(tr("&View"));
+
+    // Set Size Menu
+    auto set_size_menu = new QMenu(tr("&Set Size"));
+    for (size_t i = 1; i <= 5; i++)
+    {
+        auto item = new QAction(tr("&%1x").arg(i));
+        set_size_menu->addAction(item);
+        item->connect(item, &QAction::triggered, this, [&, i](bool checked) {
+            resizeToMultiple(i);
+        });
+    }
+    view_menu->addMenu(set_size_menu);
+
+    view_menu->addSeparator();
+
+    auto fullscreen_item = new QAction(QIcon::fromTheme("view-fullscreen"), tr("&Fullscreen"));
+    view_menu->addAction(fullscreen_item);
+    fullscreen_item->connect(fullscreen_item, &QAction::triggered, [&](bool checked) {
+        toggleFullscreen();
+    });
+
+    menuBar()->addMenu(view_menu);
+
+    // Options Menu
+    auto options_menu = new QMenu(tr("&Options"));
+
+    std::array<QString, 7> setting_panels = { tr("&General..."),
+                                              tr("&Display..."),
+                                              tr("&Sound..."),
+                                              tr("&Emulation..."),
+                                              tr("&Controllers..."),
+                                              tr("Shortcu&ts..."),
+                                              tr("&Files...") };
+    const char *setting_icons[] = { ":/icons/blackicons/settings.svg",
+                                    ":/icons/blackicons/display.svg",
+                                    ":/icons/blackicons/sound.svg",
+                                    ":/icons/blackicons/emulation.svg",
+                                    ":/icons/blackicons/joypad.svg",
+                                    ":/icons/blackicons/keyboard.svg",
+                                    ":/icons/blackicons/folders.svg" };
+
+    for (int i = 0; i < setting_panels.size(); i++)
+    {
+        auto action = options_menu->addAction(QIcon(setting_icons[i]), setting_panels[i]);
+        QObject::connect(action, &QAction::triggered, [&, i] {
+            if (!g_emu_settings_window)
+                g_emu_settings_window = new EmuSettingsWindow(this, app);
+            g_emu_settings_window->show(i);
+        });
+    }
+
+    options_menu->addSeparator();
+    auto shader_settings_item = new QAction(QIcon(":/icons/blackicons/shader.svg"), tr("S&hader Settings..."));
+    QObject::connect(shader_settings_item, &QAction::triggered, [&] {
+        if (canvas)
+            canvas->showParametersDialog();
+    });
+    options_menu->addAction(shader_settings_item);
+
+    menuBar()->addMenu(options_menu);
+
+    setCoreActionsEnabled(false);
+
+    if (app->config->main_window_width != 0 && app->config->main_window_height != 0)
+        resize(app->config->main_window_width, app->config->main_window_height);
+}
+
+void EmuMainWindow::resizeToMultiple(int multiple)
+{
+    resize((224 * multiple) * app->config->aspect_ratio_numerator / app->config->aspect_ratio_denominator, (224 * multiple) + menuBar()->height());
+}
+
+void EmuMainWindow::setBypassCompositor(bool bypass)
+{
+#ifndef _WIN32
+    if (QGuiApplication::platformName() == "xcb")
+    {
+        auto pni = QGuiApplication::platformNativeInterface();
+
+        uint32_t value = bypass;
+        auto display = (Display *)pni->nativeResourceForWindow("display", windowHandle());
+        auto xid = winId();
+        Atom net_wm_bypass_compositor = XInternAtom(display, "_NET_WM_BYPASS_COMPOSITOR", False);
+        XChangeProperty(display, xid, net_wm_bypass_compositor, 6, 32, PropModeReplace, (unsigned char *)&value, 1);
+    }
+#endif
+}
+
+void EmuMainWindow::chooseState(bool save)
+{
+    app->pause();
+
+    QFileDialog dialog(this, tr("Choose a State File"));
+
+    dialog.setDirectory(QString::fromStdString(app->core->getStateFolder()));
+    dialog.setNameFilters({ tr("Save States (*.sst *.oops *.undo *.0?? *.1?? *.2?? *.3?? *.4?? *.5?? *.6?? *.7?? *.8?? *.9*)"), tr("All Files (*)") });
+
+    if (!save)
+        dialog.setFileMode(QFileDialog::ExistingFile);
+    else
+    {
+        dialog.setFileMode(QFileDialog::AnyFile);
+        dialog.setAcceptMode(QFileDialog::AcceptSave);
+    }
+
+    if (!dialog.exec() || dialog.selectedFiles().empty())
+    {
+        app->unpause();
+        return;
+    }
+
+    auto filename = dialog.selectedFiles()[0];
+
+    if (!save)
+        app->loadState(filename.toStdString());
+    else
+        app->saveState(filename.toStdString());
+
+    app->unpause();
+}
+
+void EmuMainWindow::openFile()
+{
+    app->pause();
+    QFileDialog dialog(this, tr("Open a ROM File"));
+    dialog.setFileMode(QFileDialog::ExistingFile);
+    dialog.setDirectory(QString::fromStdString(app->config->last_rom_folder));
+    dialog.setNameFilters({ tr("ROM Files (*.sfc *.smc *.bin *.fig *.msu *.zip)"), tr("All Files (*)") });
+
+    if (!dialog.exec() || dialog.selectedFiles().empty())
+    {
+        app->unpause();
+        return;
+    }
+
+    auto filename = dialog.selectedFiles()[0];
+    app->config->last_rom_folder = dialog.directory().canonicalPath().toStdString();
+
+    openFile(filename.toStdString());
+    app->unpause();
+}
+
+bool EmuMainWindow::openFile(std::string filename)
+{
+    if (app->openFile(filename))
+    {
+        auto &ru = app->config->recently_used;
+        auto it = std::find(ru.begin(), ru.end(), filename);
+        if (it != ru.end())
+            ru.erase(it);
+        ru.insert(ru.begin(), filename);
+        populateRecentlyUsed();
+        setCoreActionsEnabled(true);
+        if (!isFullScreen() && app->config->fullscreen_on_open)
+            toggleFullscreen();
+        app->startGame();
+        mouse_timer.start();
+        return true;
+    }
+    return false;
+}
+
+
+void EmuMainWindow::populateRecentlyUsed()
+{
+    recent_menu->clear();
+
+    if (app->config->recently_used.empty())
+    {
+        auto action = recent_menu->addAction(tr("No recent files"));
+        action->setDisabled(true);
+        return;
+    }
+
+    while (app->config->recently_used.size() > 10)
+        app->config->recently_used.pop_back();
+
+    for (int i = 0; i < app->config->recently_used.size(); i++)
+    {
+        auto &string = app->config->recently_used[i];
+        auto action = recent_menu->addAction(QString("&%1: %2").arg(i).arg(QString::fromStdString(string)));
+        connect(action, &QAction::triggered, [&, string] {
+            openFile(string);
+        });
+    }
+
+    recent_menu->addSeparator();
+    auto action = recent_menu->addAction(tr("Clear Recent Files"));
+    connect(action, &QAction::triggered, [&] {
+        app->config->recently_used.clear();
+        populateRecentlyUsed();
+    });
+}
+
+#undef KeyPress
+#undef KeyRelease
+bool EmuMainWindow::event(QEvent *event)
+{
+    switch (event->type())
+    {
+    case QEvent::Close:
+        if (isFullScreen())
+        {
+            toggleFullscreen();
+        }
+        if (canvas)
+            canvas->deinit();
+        QGuiApplication::sync();
+        event->accept();
+        break;
+    case QEvent::Resize:
+        if (!isFullScreen() && !isMaximized())
+        {
+            app->config->main_window_width = ((QResizeEvent *)event)->size().width();
+            app->config->main_window_height = ((QResizeEvent *)event)->size().height();
+        }
+        break;
+    case QEvent::WindowActivate:
+        if (focus_pause)
+        {
+            focus_pause = false;
+            app->unpause();
+        }
+        break;
+    case QEvent::WindowDeactivate:
+        if (app->config->pause_emulation_when_unfocused && !focus_pause)
+        {
+            focus_pause = true;
+            app->pause();
+        }
+        break;
+    case QEvent::MouseMove:
+        if (!cursor_visible)
+        {
+            setCursor(QCursor(Qt::ArrowCursor));
+            cursor_visible = true;
+            mouse_timer.start();
+        }
+        break;
+    default:
+        break;
+    }
+
+    return QMainWindow::event(event);
+}
+
+void EmuMainWindow::toggleFullscreen()
+{
+    if (isFullScreen())
+    {
+        app->config->setVRRConfig(false);
+        app->updateSettings();
+        setBypassCompositor(false);
+        showNormal();
+        menuBar()->setVisible(true);
+    }
+    else
+    {
+        if (app->config->adjust_for_vrr)
+        {
+            app->config->setVRRConfig(true);
+            app->updateSettings();
+        }
+        showFullScreen();
+        menuBar()->setVisible(false);
+        setBypassCompositor(true);
+    }
+}
+
+bool EmuMainWindow::eventFilter(QObject *watched, QEvent *event)
+{
+    if (event->type() != QEvent::KeyPress && event->type() != QEvent::KeyRelease)
+        return false;
+
+    if (watched != this && watched != canvas && !app->binding_callback)
+        return false;
+
+    auto key_event = (QKeyEvent *)event;
+
+    if (isFullScreen() && key_event->key() == Qt::Key_Escape)
+    {
+        toggleFullscreen();
+        return true;
+    }
+
+    auto binding = EmuBinding::keyboard(key_event->key(),
+                                        key_event->modifiers().testFlag(Qt::ShiftModifier),
+                                        key_event->modifiers().testFlag(Qt::AltModifier),
+                                        key_event->modifiers().testFlag(Qt::ControlModifier),
+                                        key_event->modifiers().testFlag(Qt::MetaModifier));
+
+    if ((app->isBound(binding) || app->binding_callback) && !key_event->isAutoRepeat())
+    {
+        app->reportBinding(binding, event->type() == QEvent::KeyPress);
+        event->accept();
+        return true;
+    }
+
+    return false;
+}
+
+std::vector<std::string> EmuMainWindow::getDisplayDeviceList()
+{
+    if (!canvas)
+        return { "Default" };
+    return canvas->getDeviceList();
+}
+
+void EmuMainWindow::pauseContinue()
+{
+    if (manual_pause)
+    {
+        manual_pause = false;
+        app->unpause();
+    }
+    else
+    {
+        manual_pause = true;
+        app->pause();
+    }
+}
+
+bool EmuMainWindow::isActivelyDrawing()
+{
+    return (!app->isPaused() && app->core->active);
+}

qt/src/EmuMainWindow.hpp

@@ -0,0 +1,55 @@
+#ifndef __EMU_MAIN_WINDOW_HPP
+#define __EMU_MAIN_WINDOW_HPP
+
+#include <QMainWindow>
+#include <QTimer>
+#include "EmuCanvas.hpp"
+
+class EmuApplication;
+
+class EmuMainWindow : public QMainWindow
+{
+  public:
+    EmuMainWindow(EmuApplication *app);
+    ~EmuMainWindow();
+
+    void toggleFullscreen();
+    void createCanvas();
+    void destroyCanvas();
+    void recreateCanvas();
+    void setBypassCompositor(bool);
+    void setCoreActionsEnabled(bool);
+    bool event(QEvent *event) override;
+    bool eventFilter(QObject *, QEvent *event) override;
+    void resizeToMultiple(int multiple);
+    void populateRecentlyUsed();
+    void chooseState(bool save);
+    void pauseContinue();
+    bool isActivelyDrawing();
+    void openFile();
+    bool openFile(std::string filename);
+    std::vector<std::string> getDisplayDeviceList();
+    EmuApplication *app;
+    EmuCanvas *canvas;
+
+  private:
+    void idle();
+    void createWidgets();
+
+    static const size_t recent_menu_size = 10;
+    static const size_t state_items_size = 10;
+
+    bool manual_pause = false;
+    bool focus_pause = false;
+    bool using_stacked_widget = false;
+    QMenu *load_state_menu;
+    QMenu *save_state_menu;
+    QMenu *recent_menu;
+    QTimer mouse_timer;
+    bool cursor_visible = true;
+    QAction *shader_settings_item;
+    std::vector<QAction *> core_actions;
+    std::vector<QAction *> recent_menu_items;
+};
+
+#endif

qt/src/EmuSettingsWindow.cpp

@@ -0,0 +1,57 @@
+#include "EmuSettingsWindow.hpp"
+#include "src/EmuMainWindow.hpp"
+
+#include <QScrollArea>
+
+EmuSettingsWindow::EmuSettingsWindow(QWidget *parent, EmuApplication *app)
+    : QDialog(parent), app(app)
+{
+    setupUi(this);
+
+    general_panel = new GeneralPanel(app);
+    stackedWidget->addWidget(general_panel);
+
+    QScrollArea *area = new QScrollArea(stackedWidget);
+    area->setWidgetResizable(true);
+    area->setFrameStyle(0);
+    display_panel = new DisplayPanel(app);
+    area->setWidget(display_panel);
+    stackedWidget->addWidget(area);
+
+    sound_panel = new SoundPanel(app);
+    stackedWidget->addWidget(sound_panel);
+
+    emulation_panel = new EmulationPanel(app);
+    stackedWidget->addWidget(emulation_panel);
+
+    controller_panel = new ControllerPanel(app);
+    stackedWidget->addWidget(controller_panel);
+
+    shortcuts_panel = new ShortcutsPanel(app);
+    stackedWidget->addWidget(shortcuts_panel);
+
+    folders_panel = new FoldersPanel(app);
+    stackedWidget->addWidget(folders_panel);
+
+    stackedWidget->setCurrentIndex(0);
+
+    closeButton->connect(closeButton, &QPushButton::clicked, [&](bool) {
+        this->close();
+    });
+
+    panelList->connect(panelList, &QListWidget::currentItemChanged, [&](QListWidgetItem *prev, QListWidgetItem *cur) {
+        stackedWidget->setCurrentIndex(panelList->currentRow());
+    });
+}
+
+EmuSettingsWindow::~EmuSettingsWindow()
+{
+}
+
+void EmuSettingsWindow::show(int page)
+{
+    panelList->setCurrentRow(page);
+    stackedWidget->setCurrentIndex(page);
+    if (!isVisible())
+        open();
+}

qt/src/EmuSettingsWindow.hpp

@@ -0,0 +1,30 @@
+#pragma once
+
+#include "ui_EmuSettingsWindow.h"
+#include "EmuApplication.hpp"
+#include "GeneralPanel.hpp"
+#include "DisplayPanel.hpp"
+#include "SoundPanel.hpp"
+#include "EmulationPanel.hpp"
+#include "ControllerPanel.hpp"
+#include "FoldersPanel.hpp"
+#include "ShortcutsPanel.hpp"
+
+class EmuSettingsWindow
+  : public QDialog,
+    public Ui::EmuSettingsWindow
+{
+  public:
+    EmuSettingsWindow(QWidget *parent, EmuApplication *app);
+    ~EmuSettingsWindow();
+    void show(int page);
+
+    EmuApplication *app;
+    GeneralPanel *general_panel;
+    DisplayPanel *display_panel;
+    SoundPanel *sound_panel;
+    EmulationPanel *emulation_panel;
+    ControllerPanel *controller_panel;
+    ShortcutsPanel *shortcuts_panel;
+    FoldersPanel *folders_panel;
+};

qt/src/EmuSettingsWindow.ui

@@ -0,0 +1,158 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>EmuSettingsWindow</class>
+ <widget class="QDialog" name="EmuSettingsWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>933</width>
+    <height>719</height>
+   </rect>
+  </property>
+  <property name="focusPolicy">
+   <enum>Qt::NoFocus</enum>
+  </property>
+  <property name="windowTitle">
+   <string>Dialog</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout_2">
+     <item>
+      <widget class="QListWidget" name="panelList">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="sizeAdjustPolicy">
+        <enum>QAbstractScrollArea::AdjustToContents</enum>
+       </property>
+       <property name="resizeMode">
+        <enum>QListView::Fixed</enum>
+       </property>
+       <item>
+        <property name="text">
+         <string>General</string>
+        </property>
+        <property name="icon">
+         <iconset resource="resources/snes9x.qrc">
+          <normaloff>:/icons/blackicons/settings.svg</normaloff>:/icons/blackicons/settings.svg</iconset>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Display</string>
+        </property>
+        <property name="icon">
+         <iconset resource="resources/snes9x.qrc">
+          <normaloff>:/icons/blackicons/display.svg</normaloff>:/icons/blackicons/display.svg</iconset>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Sound</string>
+        </property>
+        <property name="icon">
+         <iconset resource="resources/snes9x.qrc">
+          <normaloff>:/icons/blackicons/sound.svg</normaloff>:/icons/blackicons/sound.svg</iconset>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Emulation</string>
+        </property>
+        <property name="icon">
+         <iconset resource="resources/snes9x.qrc">
+          <normaloff>:/icons/blackicons/emulation.svg</normaloff>:/icons/blackicons/emulation.svg</iconset>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Controllers</string>
+        </property>
+        <property name="icon">
+         <iconset resource="resources/snes9x.qrc">
+          <normaloff>:/icons/blackicons/joypad.svg</normaloff>:/icons/blackicons/joypad.svg</iconset>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Shortcuts</string>
+        </property>
+        <property name="icon">
+         <iconset resource="resources/snes9x.qrc">
+          <normaloff>:/icons/blackicons/keyboard.svg</normaloff>:/icons/blackicons/keyboard.svg</iconset>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Files</string>
+        </property>
+        <property name="icon">
+         <iconset resource="resources/snes9x.qrc">
+          <normaloff>:/icons/blackicons/folders.svg</normaloff>:/icons/blackicons/folders.svg</iconset>
+        </property>
+       </item>
+      </widget>
+     </item>
+     <item>
+      <widget class="QStackedWidget" name="stackedWidget">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QPushButton" name="defaultsButton">
+       <property name="text">
+        <string>Restore Defaults</string>
+       </property>
+       <property name="icon">
+        <iconset theme="view-refresh">
+         <normaloff>.</normaloff>.</iconset>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="horizontalSpacer">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QPushButton" name="closeButton">
+       <property name="text">
+        <string>Close</string>
+       </property>
+       <property name="icon">
+        <iconset theme="window-close">
+         <normaloff>.</normaloff>.</iconset>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <resources>
+  <include location="resources/snes9x.qrc"/>
+ </resources>
+ <connections/>
+</ui>

qt/src/EmulationPanel.cpp

@@ -0,0 +1,67 @@
+#include "EmulationPanel.hpp"
+EmulationPanel::EmulationPanel(EmuApplication *app_)
+    : app(app_)
+{
+    setupUi(this);
+
+    auto connect_checkbox = [&](QCheckBox *box, bool *config) {
+        QObject::connect(box, &QCheckBox::clicked, [&, box, config](bool is_checked) {
+            *config = is_checked;
+            app->updateSettings();
+        });
+    };
+    auto connect_spin = [&](QSpinBox *box, int *config) {
+        QObject::connect(box, &QSpinBox::valueChanged, [&, box, config](int value) {
+            *config = value;
+            app->updateSettings();
+        });
+    };
+    auto connect_combo = [&](QComboBox *box, int *config) {
+        QObject::connect(box, &QComboBox::activated, [&, box, config](int index) {
+            *config = index;
+            app->updateSettings();
+        });
+    };
+    connect_combo(comboBox_speed_control_method, &app->config->speed_sync_method);
+    QObject::connect(doubleSpinBox_frame_rate, &QDoubleSpinBox::valueChanged, [&](double value) {
+        app->config->fixed_frame_rate = value;
+    });
+
+    connect_spin(spinBox_rewind_buffer_size, &app->config->rewind_buffer_size);
+    connect_spin(spinBox_rewind_frames, &app->config->rewind_frame_interval);
+    connect_spin(spinBox_fast_forward_skip_frames, &app->config->fast_forward_skip_frames);
+
+    connect_checkbox(checkBox_allow_invalid_vram_access, &app->config->allow_invalid_vram_access);
+    connect_checkbox(checkBox_allow_opposing_dpad_directions, &app->config->allow_opposing_dpad_directions);
+    connect_checkbox(checkBox_overclock, &app->config->overclock);
+    connect_checkbox(checkBox_remove_sprite_limit, &app->config->remove_sprite_limit);
+    connect_checkbox(checkBox_use_shadow_echo_buffer, &app->config->enable_shadow_buffer);
+    connect_spin(spinBox_superfx_clock_speed, &app->config->superfx_clock_multiplier);
+    connect_combo(comboBox_sound_filter, &app->config->sound_filter);
+}
+
+EmulationPanel::~EmulationPanel()
+{
+}
+
+void EmulationPanel::showEvent(QShowEvent *event)
+{
+    auto &config = app->config;
+    comboBox_speed_control_method->setCurrentIndex(config->speed_sync_method);
+    doubleSpinBox_frame_rate->setValue(config->fixed_frame_rate);
+    spinBox_fast_forward_skip_frames->setValue(config->fast_forward_skip_frames);
+
+    spinBox_rewind_buffer_size->setValue(config->rewind_buffer_size);
+    spinBox_rewind_frames->setValue(config->rewind_frame_interval);
+
+    checkBox_allow_invalid_vram_access->setChecked(config->allow_invalid_vram_access);
+    checkBox_allow_opposing_dpad_directions->setChecked(config->allow_opposing_dpad_directions);
+    checkBox_overclock->setChecked(config->overclock);
+    checkBox_remove_sprite_limit->setChecked(config->remove_sprite_limit);
+    checkBox_use_shadow_echo_buffer->setChecked(config->enable_shadow_buffer);
+    spinBox_superfx_clock_speed->setValue(config->superfx_clock_multiplier);
+    comboBox_sound_filter->setCurrentIndex(config->sound_filter);
+
+    QWidget::showEvent(event);
+}
+

qt/src/EmulationPanel.hpp

@@ -0,0 +1,15 @@
+#pragma once
+#include "ui_EmulationPanel.h"
+#include "EmuApplication.hpp"
+
+class EmulationPanel :
+    public Ui::EmulationPanel,
+    public QWidget
+{
+  public:
+    EmulationPanel(EmuApplication *app);
+    ~EmulationPanel();
+    void showEvent(QShowEvent *event) override;
+
+    EmuApplication *app;
+};

qt/src/EmulationPanel.ui

@@ -0,0 +1,378 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>EmulationPanel</class>
+ <widget class="QWidget" name="EmulationPanel">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>862</width>
+    <height>756</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="groupBox">
+     <property name="title">
+      <string>Emulation Speed</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_2">
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout">
+        <item>
+         <widget class="QLabel" name="label">
+          <property name="text">
+           <string>Speed control method:</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QComboBox" name="comboBox_speed_control_method">
+          <item>
+           <property name="text">
+            <string>Timer - Match the frame rate configured below</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>Timer with Frame Skipping - Skip frames if needed</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>Sound Synchronization - Wait on the sound buffer</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>None - Run unthrottled, unless vsync is turned on</string>
+           </property>
+          </item>
+         </widget>
+        </item>
+        <item>
+         <spacer name="horizontalSpacer">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout_2">
+        <item>
+         <widget class="QLabel" name="label_2">
+          <property name="text">
+           <string>Frame rate:</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QDoubleSpinBox" name="doubleSpinBox_frame_rate">
+          <property name="suffix">
+           <string> fps</string>
+          </property>
+          <property name="decimals">
+           <number>4</number>
+          </property>
+          <property name="minimum">
+           <double>0.000000000000000</double>
+          </property>
+          <property name="maximum">
+           <double>120.000000000000000</double>
+          </property>
+          <property name="value">
+           <double>0.000000000000000</double>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <spacer name="horizontalSpacer_2">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <widget class="QLabel" name="label_3">
+        <property name="text">
+         <string>Set frame rate to 0 to automatically change based on PAL/NTSC and with interlacing on and off.</string>
+        </property>
+        <property name="textFormat">
+         <enum>Qt::PlainText</enum>
+        </property>
+        <property name="wordWrap">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout_5">
+        <item>
+         <widget class="QLabel" name="label_8">
+          <property name="text">
+           <string>Fast-forward frame skip:</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QSpinBox" name="spinBox_fast_forward_skip_frames">
+          <property name="suffix">
+           <string> frames</string>
+          </property>
+          <property name="minimum">
+           <number>1</number>
+          </property>
+          <property name="maximum">
+           <number>15</number>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <spacer name="horizontalSpacer_6">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_2">
+     <property name="title">
+      <string>Rewind</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_3">
+      <item>
+       <layout class="QGridLayout" name="gridLayout">
+        <item row="0" column="0">
+         <widget class="QLabel" name="label_4">
+          <property name="text">
+           <string>Rewind buffer size (0 to disable):</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="1">
+         <widget class="QSpinBox" name="spinBox_rewind_frames"/>
+        </item>
+        <item row="1" column="0">
+         <widget class="QLabel" name="label_5">
+          <property name="text">
+           <string>Frames between steps</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="1">
+         <widget class="QSpinBox" name="spinBox_rewind_buffer_size">
+          <property name="suffix">
+           <string> MB</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="2">
+         <spacer name="horizontalSpacer_3">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_3">
+     <property name="title">
+      <string>Hacks</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_4">
+      <item>
+       <layout class="QGridLayout" name="gridLayout_2">
+        <item row="0" column="0">
+         <widget class="QCheckBox" name="checkBox_allow_invalid_vram_access">
+          <property name="text">
+           <string>Allow invalid VRAM access</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="0">
+         <widget class="QCheckBox" name="checkBox_overclock">
+          <property name="text">
+           <string>Overclock the CPU</string>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="0">
+         <widget class="QCheckBox" name="checkBox_use_shadow_echo_buffer">
+          <property name="text">
+           <string>Use a shadow echo buffer</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="1">
+         <widget class="QCheckBox" name="checkBox_allow_opposing_dpad_directions">
+          <property name="text">
+           <string>Allow opposite D-pad directions simultaneously</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="1">
+         <widget class="QCheckBox" name="checkBox_remove_sprite_limit">
+          <property name="text">
+           <string>Remove the sprite limit</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout_3">
+        <item>
+         <widget class="QLabel" name="label_6">
+          <property name="text">
+           <string>SuperFX clock speed:</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QSpinBox" name="spinBox_superfx_clock_speed">
+          <property name="suffix">
+           <string>%</string>
+          </property>
+          <property name="minimum">
+           <number>50</number>
+          </property>
+          <property name="maximum">
+           <number>1000</number>
+          </property>
+          <property name="singleStep">
+           <number>10</number>
+          </property>
+          <property name="value">
+           <number>100</number>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <spacer name="horizontalSpacer_4">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout_4">
+        <item>
+         <widget class="QLabel" name="label_7">
+          <property name="text">
+           <string>Alternate sound filter:</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QComboBox" name="comboBox_sound_filter">
+          <item>
+           <property name="text">
+            <string>Nearest</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>Linear</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>Gaussian</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>Cubic</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>Sinc</string>
+           </property>
+          </item>
+         </widget>
+        </item>
+        <item>
+         <spacer name="horizontalSpacer_5">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>40</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

qt/src/FoldersPanel.cpp

@@ -0,0 +1,68 @@
+#include "FoldersPanel.hpp"
+#include <QSpinBox>
+#include <QFileDialog>
+
+FoldersPanel::FoldersPanel(EmuApplication *app_)
+    : app(app_)
+{
+    setupUi(this);
+
+    connectEntry(comboBox_sram, lineEdit_sram, pushButton_sram, &app->config->sram_location, &app->config->sram_folder);
+    connectEntry(comboBox_state, lineEdit_state, pushButton_state, &app->config->state_location, &app->config->state_folder);
+    connectEntry(comboBox_cheat, lineEdit_cheat, pushButton_cheat, &app->config->cheat_location, &app->config->cheat_folder);
+    connectEntry(comboBox_patch, lineEdit_patch, pushButton_patch, &app->config->patch_location, &app->config->patch_folder);
+    connectEntry(comboBox_export, lineEdit_export, pushButton_export, &app->config->export_location, &app->config->export_folder);
+}
+
+FoldersPanel::~FoldersPanel()
+{
+}
+
+void FoldersPanel::connectEntry(QComboBox *combo, QLineEdit *lineEdit, QPushButton *browse, int *location, std::string *folder)
+{
+    auto config = app->config.get();
+
+    QObject::connect(combo, &QComboBox::activated, [=](int index) {
+        *location = index;
+        refreshEntry(combo, lineEdit, browse, location, folder);
+        app->updateSettings();
+    });
+
+    QObject::connect(browse, &QPushButton::pressed, [=] {
+        QFileDialog dialog(this, tr("Select a Folder"));
+        dialog.setFileMode(QFileDialog::Directory);
+        dialog.setDirectory(QString::fromUtf8(*folder));
+        if (!dialog.exec())
+            return;
+        *folder = dialog.selectedFiles().at(0).toUtf8();
+        lineEdit->setText(QString::fromUtf8(*folder));
+        app->updateSettings();
+    });
+}
+
+void FoldersPanel::refreshData()
+{
+    refreshEntry(comboBox_sram, lineEdit_sram, pushButton_sram, &app->config->sram_location, &app->config->sram_folder);
+    refreshEntry(comboBox_state, lineEdit_state, pushButton_state, &app->config->state_location, &app->config->state_folder);
+    refreshEntry(comboBox_cheat, lineEdit_cheat, pushButton_cheat, &app->config->cheat_location, &app->config->cheat_folder);
+    refreshEntry(comboBox_patch, lineEdit_patch, pushButton_patch, &app->config->patch_location, &app->config->patch_folder);
+    refreshEntry(comboBox_export, lineEdit_export, pushButton_export, &app->config->export_location, &app->config->export_folder);
+}
+
+void FoldersPanel::refreshEntry(QComboBox *combo, QLineEdit *lineEdit, QPushButton *browse, int *location, std::string *folder)
+{
+    bool custom = (*location == EmuConfig::eCustomDirectory);
+    combo->setCurrentIndex(*location);
+    lineEdit->setText(custom ? QString::fromUtf8(*folder) : "");
+    lineEdit->setEnabled(custom);
+    browse->setEnabled(custom);
+
+}
+
+void FoldersPanel::showEvent(QShowEvent *event)
+{
+    refreshData();
+
+    QWidget::showEvent(event);
+}
+

qt/src/FoldersPanel.hpp

@@ -0,0 +1,17 @@
+#pragma once
+#include "ui_FoldersPanel.h"
+#include "EmuApplication.hpp"
+
+class FoldersPanel :
+    public Ui::FoldersPanel,
+    public QWidget
+{
+  public:
+    FoldersPanel(EmuApplication *app);
+    ~FoldersPanel();
+    void showEvent(QShowEvent *event) override;
+    void connectEntry(QComboBox *combo, QLineEdit *lineEdit, QPushButton *browse, int *location, std::string *folder);
+    void refreshEntry(QComboBox *combo, QLineEdit *lineEdit, QPushButton *browse, int *location, std::string *folder);
+    void refreshData();
+    EmuApplication *app;
+};

qt/src/FoldersPanel.ui

@@ -0,0 +1,282 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>FoldersPanel</class>
+ <widget class="QWidget" name="FoldersPanel">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>779</width>
+    <height>673</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="groupBox">
+     <property name="title">
+      <string>Data Locations</string>
+     </property>
+     <layout class="QGridLayout" name="gridLayout">
+      <item row="5" column="2">
+       <widget class="QComboBox" name="comboBox_export">
+        <item>
+         <property name="text">
+          <string>ROM Folder</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Config Folder</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Custom Folder</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item row="1" column="2">
+       <widget class="QComboBox" name="comboBox_state">
+        <item>
+         <property name="text">
+          <string>ROM Folder</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Config Folder</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Custom Folder</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item row="0" column="2">
+       <widget class="QComboBox" name="comboBox_sram">
+        <item>
+         <property name="text">
+          <string>ROM Folder</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Config Folder</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Custom Folder</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item row="1" column="0">
+       <widget class="QLabel" name="label_2">
+        <property name="text">
+         <string>Save states</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="4">
+       <widget class="QPushButton" name="pushButton_sram">
+        <property name="text">
+         <string>Browse...</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="0" colspan="2">
+       <widget class="QLabel" name="label">
+        <property name="text">
+         <string>SRAM</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="3">
+       <widget class="QLineEdit" name="lineEdit_sram">
+        <property name="readOnly">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="2">
+       <widget class="QComboBox" name="comboBox_patch">
+        <item>
+         <property name="text">
+          <string>ROM Folder</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Config Folder</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Custom Folder</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item row="3" column="2">
+       <widget class="QComboBox" name="comboBox_cheat">
+        <item>
+         <property name="text">
+          <string>ROM Folder</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Config Folder</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>Custom Folder</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item row="3" column="0">
+       <widget class="QLabel" name="label_3">
+        <property name="text">
+         <string>Cheats</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="0">
+       <widget class="QLabel" name="label_4">
+        <property name="text">
+         <string>Patches</string>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="0">
+       <widget class="QLabel" name="label_5">
+        <property name="text">
+         <string>Exports</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="3">
+       <widget class="QLineEdit" name="lineEdit_state">
+        <property name="readOnly">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="3">
+       <widget class="QLineEdit" name="lineEdit_cheat">
+        <property name="readOnly">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="3">
+       <widget class="QLineEdit" name="lineEdit_patch">
+        <property name="readOnly">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="3">
+       <widget class="QLineEdit" name="lineEdit_export">
+        <property name="readOnly">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="4">
+       <widget class="QPushButton" name="pushButton_state">
+        <property name="text">
+         <string>Browse...</string>
+        </property>
+       </widget>
+      </item>
+      <item row="3" column="4">
+       <widget class="QPushButton" name="pushButton_cheat">
+        <property name="text">
+         <string>Browse...</string>
+        </property>
+       </widget>
+      </item>
+      <item row="4" column="4">
+       <widget class="QPushButton" name="pushButton_patch">
+        <property name="text">
+         <string>Browse...</string>
+        </property>
+       </widget>
+      </item>
+      <item row="5" column="4">
+       <widget class="QPushButton" name="pushButton_export">
+        <property name="text">
+         <string>Browse...</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_2">
+     <property name="title">
+      <string>SRAM</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout_2">
+      <item>
+       <widget class="QLabel" name="label_6">
+        <property name="text">
+         <string>Save SRAM to disk every:</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QSpinBox" name="spinBox_sram_interval">
+        <property name="suffix">
+         <string> seconds</string>
+        </property>
+        <property name="maximum">
+         <number>1000</number>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <spacer name="horizontalSpacer">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="sizeHint" stdset="0">
+         <size>
+          <width>40</width>
+          <height>20</height>
+         </size>
+        </property>
+       </spacer>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>40</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

qt/src/GeneralPanel.cpp

@@ -0,0 +1,44 @@
+#include "GeneralPanel.hpp"
+
+GeneralPanel::GeneralPanel(EmuApplication *app_)
+    : app(app_)
+{
+    setupUi(this);
+
+    auto connectCheckbox = [&](QCheckBox *box, bool *config)
+    {
+        QObject::connect(box, &QCheckBox::clicked, [&, config](bool checked)
+        {
+            *config = checked;
+            app->updateSettings();
+        });
+    };
+
+    connectCheckbox(checkBox_fullscreen_on_open, &app->config->fullscreen_on_open);
+    connectCheckbox(checkBox_disable_screensaver, &app->config->disable_screensaver);
+    connectCheckbox(checkBox_pause_when_unfocused, &app->config->pause_emulation_when_unfocused);
+    connectCheckbox(checkBox_show_frame_rate, &app->config->show_frame_rate);
+    connectCheckbox(checkBox_show_indicators, &app->config->show_indicators);
+    connectCheckbox(checkBox_show_pressed_keys, &app->config->show_pressed_keys);
+    connectCheckbox(checkBox_show_time, &app->config->show_time);
+}
+
+GeneralPanel::~GeneralPanel()
+{
+}
+
+void GeneralPanel::showEvent(QShowEvent *event)
+{
+    auto &config = app->config;
+    checkBox_fullscreen_on_open->setChecked(config->fullscreen_on_open);
+    checkBox_disable_screensaver->setChecked(config->disable_screensaver);
+    checkBox_disable_screensaver->setVisible(false);
+    checkBox_pause_when_unfocused->setChecked(config->pause_emulation_when_unfocused);
+    checkBox_show_frame_rate->setChecked(config->show_frame_rate);
+    checkBox_show_indicators->setChecked(config->show_indicators);
+    checkBox_show_pressed_keys->setChecked(config->show_pressed_keys);
+    checkBox_show_time->setChecked(config->show_time);
+
+    QWidget::showEvent(event);
+}
+

qt/src/GeneralPanel.hpp

@@ -0,0 +1,15 @@
+#pragma once
+#include "ui_GeneralPanel.h"
+#include "EmuApplication.hpp"
+
+class GeneralPanel :
+    public Ui::GeneralPanel,
+    public QWidget
+{
+  public:
+    GeneralPanel(EmuApplication *app);
+    ~GeneralPanel();
+    void showEvent(QShowEvent *event) override;
+
+    EmuApplication *app;
+};

qt/src/GeneralPanel.ui

@@ -0,0 +1,101 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>GeneralPanel</class>
+ <widget class="QWidget" name="GeneralPanel">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>752</width>
+    <height>615</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="groupBox">
+     <property name="title">
+      <string>General</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_2">
+      <item>
+       <widget class="QCheckBox" name="checkBox_fullscreen_on_open">
+        <property name="text">
+         <string>Switch to fullscreen after opening a ROM</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="checkBox_disable_screensaver">
+        <property name="text">
+         <string>Disable screensaver</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="checkBox_pause_when_unfocused">
+        <property name="text">
+         <string>Pause emulation when window is not focused</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_2">
+     <property name="title">
+      <string>Overlays</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_3">
+      <item>
+       <widget class="QCheckBox" name="checkBox_show_frame_rate">
+        <property name="text">
+         <string>Show frame rate</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="checkBox_show_indicators">
+        <property name="text">
+         <string>Show fast-forward and pause icons</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="checkBox_show_pressed_keys">
+        <property name="text">
+         <string>Show pressed keys</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="checkBox_show_time">
+        <property name="text">
+         <string>Show the time</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>40</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

qt/src/SDLInputManager.cpp

@@ -0,0 +1,229 @@
+#include "SDLInputManager.hpp"
+#include "SDL.h"
+#include "SDL_events.h"
+#include "SDL_gamecontroller.h"
+#include "SDL_joystick.h"
+
+#include <algorithm>
+#include <optional>
+
+SDLInputManager::SDLInputManager()
+{
+    SDL_Init(SDL_INIT_GAMECONTROLLER | SDL_INIT_JOYSTICK);
+}
+
+SDLInputManager::~SDLInputManager()
+{
+}
+
+void SDLInputManager::AddDevice(int device_index)
+{
+    SDLInputDevice d;
+    if (!d.open(device_index))
+        return;
+    d.index = FindFirstOpenIndex();
+
+    printf("Slot %d: %s: ", d.index, SDL_JoystickName(d.joystick));
+    printf("%zu axes, %zu buttons, %zu hats, %s API\n", d.axes.size(), d.buttons.size(), d.hats.size(), d.is_controller ? "Controller" : "Joystick");
+
+    devices.insert({ d.instance_id, d });
+}
+
+void SDLInputManager::RemoveDevice(int instance_id)
+{
+    auto iter = devices.find(instance_id);
+    if (iter == devices.end())
+        return;
+
+    auto &d = iter->second;
+
+    if (d.is_controller)
+        SDL_GameControllerClose(d.controller);
+    else
+        SDL_JoystickClose(d.joystick);
+
+    devices.erase(iter);
+    return;
+}
+
+void SDLInputManager::ClearEvents()
+{
+    std::optional<SDL_Event> event;
+
+    while ((event = ProcessEvent()))
+    {
+    }
+}
+
+
+std::optional<SDLInputManager::DiscreteHatEvent>
+SDLInputManager::DiscretizeHatEvent(SDL_Event &event)
+{
+    auto &device = devices.at(event.jhat.which);
+    auto &hat = event.jhat.hat;
+    auto new_state = event.jhat.value;
+    auto &old_state = device.hats[hat].state;
+
+    if (old_state == new_state)
+        return std::nullopt;
+
+    DiscreteHatEvent dhe{};
+    dhe.hat = hat;
+    dhe.joystick_num = device.index;
+
+    for (auto &s : { SDL_HAT_UP, SDL_HAT_DOWN, SDL_HAT_LEFT, SDL_HAT_RIGHT })
+        if ((old_state & s) != (new_state & s))
+        {
+            printf(" old: %d, new: %d\n", old_state, new_state);
+            dhe.direction = s;
+            dhe.pressed = (new_state & s);
+            old_state = new_state;
+            return dhe;
+        }
+
+    return std::nullopt;
+}
+
+std::optional<SDLInputManager::DiscreteAxisEvent>
+SDLInputManager::DiscretizeJoyAxisEvent(SDL_Event &event)
+{
+    auto &device = devices.at(event.jaxis.which);
+    auto &axis = event.jaxis.axis;
+    auto now = event.jaxis.value;
+    auto &then = device.axes[axis].last;
+    auto center = device.axes[axis].initial;
+
+    int offset = now - center;
+
+    auto pressed = [&](int axis) -> int {
+        if (axis > (center + (32767 - center) / 3)) // TODO threshold
+            return 1;
+        if (axis < (center - (center + 32768) / 3)) // TODO threshold
+            return -1;
+        return 0;
+    };
+
+    auto was_pressed_then = pressed(then);
+    auto is_pressed_now   = pressed(now);
+
+    if (was_pressed_then == is_pressed_now)
+    {
+        then = now;
+        return std::nullopt;
+    }
+
+    DiscreteAxisEvent dae;
+    dae.axis = axis;
+    dae.direction = is_pressed_now ? is_pressed_now : was_pressed_then;
+    dae.pressed = (is_pressed_now != 0);
+    dae.joystick_num = device.index;
+    then = now;
+
+    return dae;
+}
+
+std::optional<SDL_Event> SDLInputManager::ProcessEvent()
+{
+    SDL_Event event{};
+
+    while (SDL_PollEvent(&event))
+    {
+        switch (event.type)
+        {
+        case SDL_JOYAXISMOTION:
+            return event;
+        case SDL_JOYHATMOTION:
+            return event;
+        case SDL_JOYBUTTONUP:
+        case SDL_JOYBUTTONDOWN:
+            return event;
+        case SDL_JOYDEVICEADDED:
+            AddDevice(event.jdevice.which);
+            return event;
+        case SDL_JOYDEVICEREMOVED:
+            RemoveDevice(event.jdevice.which);
+            return event;
+        }
+    }
+
+    return std::nullopt;
+}
+
+void SDLInputManager::PrintDevices()
+{
+    for (auto &pair : devices)
+    {
+        auto &d = pair.second;
+        printf("%s: \n", SDL_JoystickName(d.joystick));
+        printf(" Index: %d\n"
+               " Instance ID: %d\n"
+               " Controller %s\n"
+               " SDL Joystick Number: %d\n",
+               d.index,
+               d.instance_id,
+               d.is_controller ? "yes" : "no",
+               d.sdl_joystick_number);
+    }
+}
+
+int SDLInputManager::FindFirstOpenIndex()
+{
+    for (int i = 0;; i++)
+    {
+        if (std::none_of(devices.begin(), devices.end(), [i](auto &d) -> bool {
+            return (d.second.index == i);
+        }))
+            return i;
+    }
+    return -1;
+}
+
+bool SDLInputDevice::open(int joystick_num)
+{
+    sdl_joystick_number = joystick_num;
+    is_controller = SDL_IsGameController(joystick_num);
+
+    if (is_controller)
+    {
+        controller = SDL_GameControllerOpen(joystick_num);
+        joystick = SDL_GameControllerGetJoystick(controller);
+    }
+    else
+    {
+        joystick = SDL_JoystickOpen(joystick_num);
+        controller = nullptr;
+    }
+
+    if (!joystick)
+        return false;
+
+    auto num_axes = SDL_JoystickNumAxes(joystick);
+    axes.resize(num_axes);
+    for (int i = 0; i < num_axes; i++)
+    {
+        SDL_JoystickGetAxisInitialState(joystick, i, &axes[i].initial);
+        axes[i].last = axes[i].initial;
+    }
+
+    buttons.resize(SDL_JoystickNumButtons(joystick));
+    hats.resize(SDL_JoystickNumHats(joystick));
+    instance_id = SDL_JoystickInstanceID(joystick);
+
+    return true;
+}
+
+std::vector<std::pair<int, std::string>> SDLInputManager::getXInputControllers()
+{
+    std::vector<std::pair<int, std::string>> list;
+
+    for (auto &d : devices)
+    {
+        if (!d.second.is_controller)
+            continue;
+
+        list.push_back(std::pair<int, std::string>(d.first, SDL_JoystickName(d.second.joystick)));
+        auto bind = SDL_GameControllerGetBindForButton(d.second.controller, SDL_CONTROLLER_BUTTON_A);
+    }
+
+    return list;
+}

qt/src/SDLInputManager.hpp

@@ -0,0 +1,68 @@
+#pragma once
+
+#include "SDL.h"
+#include <map>
+#include <vector>
+#include <string>
+#include <optional>
+
+struct SDLInputDevice
+{
+    bool open(int joystick_num);
+
+    int index;
+    int sdl_joystick_number;
+    bool is_controller;
+    SDL_GameController *controller = nullptr;
+    SDL_Joystick *joystick = nullptr;
+    SDL_JoystickID instance_id;
+
+    struct Axis
+    {
+        int16_t initial;
+        int last;
+    };
+    std::vector<Axis> axes;
+
+    struct Hat
+    {
+        uint8_t state;
+    };
+    std::vector<Hat> hats;
+
+    std::vector<bool> buttons;
+};
+
+struct SDLInputManager
+{
+    SDLInputManager();
+    ~SDLInputManager();
+
+    std::optional<SDL_Event> ProcessEvent();
+    std::vector<std::pair<int, std::string>> getXInputControllers();
+    void ClearEvents();
+    void AddDevice(int i);
+    void RemoveDevice(int i);
+    void PrintDevices();
+    int FindFirstOpenIndex();
+
+    struct DiscreteAxisEvent
+    {
+        int joystick_num;
+        int axis;
+        int direction;
+        int pressed;
+    };
+    std::optional<DiscreteAxisEvent> DiscretizeJoyAxisEvent(SDL_Event &event);
+
+    struct DiscreteHatEvent
+    {
+        int joystick_num;
+        int hat;
+        int direction;
+        bool pressed;
+    };
+    std::optional<DiscreteHatEvent> DiscretizeHatEvent(SDL_Event &event);
+
+    std::map<SDL_JoystickID, SDLInputDevice> devices;
+};

qt/src/ShaderParametersDialog.cpp

@@ -0,0 +1,201 @@
+#include "ShaderParametersDialog.hpp"
+#include <QLayout>
+#include <QTableWidget>
+#include <QLabel>
+#include <QSizePolicy>
+#include <QPushButton>
+#include <QSpacerItem>
+#include <QScrollArea>
+#include <QFileDialog>
+
+static bool is_simple(const EmuCanvas::Parameter &p)
+{
+    return (p.min == 0.0 && p.max == 1.0 && p.step == 1.0);
+}
+
+static bool is_pointless(const EmuCanvas::Parameter &p)
+{
+    return (p.min == p.max);
+}
+
+ShaderParametersDialog::ShaderParametersDialog(EmuCanvas *parent_, std::vector<EmuCanvas::Parameter> *parameters_)
+    : QDialog(parent_), canvas(parent_), config(parent_->config), parameters(parameters_)
+{
+    setWindowTitle(tr("Shader Parameters"));
+    setMinimumSize(600, 200);
+    auto layout = new QVBoxLayout(this);
+
+    auto scroll_area = new QScrollArea(this);
+    scroll_area->setFrameShape(QFrame::Shape::StyledPanel);
+    scroll_area->setWidgetResizable(true);
+    auto scroll_area_widget_contents = new QWidget();
+    scroll_area_widget_contents->setGeometry(0, 0, 400, 300);
+
+    auto grid = new QGridLayout(scroll_area_widget_contents);
+    scroll_area->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
+
+    auto buttonbox = new QHBoxLayout();
+
+    for (int i = 0; i < parameters->size(); i++)
+    {
+        auto &p = (*parameters)[i];
+        QSlider *slider = nullptr;
+        QDoubleSpinBox *spinbox = nullptr;
+        QCheckBox *checkbox = nullptr;
+
+        auto label = new QLabel(p.name.c_str(), scroll_area_widget_contents);
+        grid->addWidget(label, i, 0, 1, 1);
+
+        if (is_pointless(p))
+        {
+            widgets.push_back({});
+            continue;
+        }
+        if (is_simple(p))
+        {
+            checkbox = new QCheckBox(scroll_area_widget_contents);
+            checkbox->setChecked(p.val == 1.0);
+            grid->addWidget(checkbox, i, 1, 1, 2);
+            QObject::connect(checkbox, &QCheckBox::clicked, [&, i](bool checked) {
+                (*parameters)[i].val = checked ? 1.0 : 0.0;
+            });
+            widgets.push_back({ slider, spinbox, checkbox });
+            continue;
+        }
+
+        slider = new QSlider(scroll_area_widget_contents);
+        grid->addWidget(slider, i, 1, 1, 1);
+        slider->setOrientation(Qt::Horizontal);
+        slider->setTickInterval(1);
+        slider->setRange(0, (p.max - p.min) / p.step);
+        slider->setValue(p.val / p.step);
+
+        spinbox = new QDoubleSpinBox(scroll_area_widget_contents);
+        grid->addWidget(spinbox, i, 2, 1, 1);
+        spinbox->setDecimals(p.significant_digits > 5 ? 5 : p.significant_digits);
+        spinbox->setRange(p.min, p.max);
+        spinbox->setSingleStep(p.step);
+        spinbox->setValue(p.val);
+
+        QObject::connect(slider, &QSlider::valueChanged, [&, i, slider, spinbox](int value) {
+            auto &p = (*parameters)[i];
+            double new_value = value * p.step + p.min;
+            spinbox->blockSignals(true);
+            spinbox->setValue(new_value);
+            spinbox->blockSignals(false);
+            p.val = new_value;
+        });
+
+        QObject::connect(spinbox, &QDoubleSpinBox::valueChanged, [&, i, slider, spinbox](double value) {
+            auto &p = (*parameters)[i];
+            int steps = round((value - p.min) / p.step);
+            p.val = steps * p.step + p.min;
+
+            slider->blockSignals(true);
+            slider->setValue(steps);
+            slider->blockSignals(false);
+
+            spinbox->blockSignals(true);
+            spinbox->setValue(p.val);
+            spinbox->blockSignals(false);
+        });
+
+        widgets.push_back({ slider, spinbox, checkbox });
+    }
+
+    auto reset = new QPushButton(tr("&Reset"), this);
+    QObject::connect(reset, &QPushButton::clicked, [&] {
+        *parameters = saved_parameters;
+        refreshWidgets();
+    });
+
+    buttonbox->addWidget(reset);
+
+    buttonbox->addStretch(1);
+
+    auto saveas = new QPushButton(tr("Save &As"), this);
+    buttonbox->addWidget(saveas);
+    connect(saveas, &QPushButton::clicked, [&] {
+        saveAs();
+    });
+
+    auto closebutton = new QPushButton(tr("&Save"), this);
+    connect(closebutton, &QPushButton::clicked, [&] {
+        save();
+        close();
+    });
+
+    buttonbox->addWidget(closebutton);
+    scroll_area->setWidget(scroll_area_widget_contents);
+    layout->addWidget(scroll_area);
+    layout->addLayout(buttonbox, 0);
+}
+
+void ShaderParametersDialog::save()
+{
+    if (std::equal(parameters->begin(), parameters->end(), saved_parameters.begin()))
+        return;
+
+    QString shadername(config->shader.c_str());
+    std::string extension;
+    if (shadername.endsWith("slangp", Qt::CaseInsensitive))
+        extension = ".slangp";
+    else if (shadername.endsWith("glslp", Qt::CaseInsensitive))
+        extension = ".glslp";
+
+    saved_parameters = *parameters;
+
+    auto filename = config->findConfigDir() + "/customized_shader" + extension;
+    canvas->saveParameters(filename);
+    config->shader = filename;
+}
+
+void ShaderParametersDialog::saveAs()
+{
+    auto folder = config->last_shader_folder;
+    auto filename = QFileDialog::getSaveFileName(this, tr("Save Shader Preset As"), folder.c_str());
+    canvas->saveParameters(filename.toStdString());
+    config->shader = filename.toStdString();
+}
+
+void ShaderParametersDialog::refreshWidgets()
+{
+    for (size_t i = 0; i < widgets.size(); i++)
+    {
+        auto &p = (*parameters)[i];
+
+        if (is_pointless(p))
+            continue;
+
+        auto [slider, spinbox, checkbox] = widgets[i];
+
+        if (is_simple(p))
+        {
+            checkbox->setChecked(p.val == 1.0 ? true : false);
+            continue;
+        }
+
+        spinbox->blockSignals(true);
+        spinbox->setValue(p.val);
+        spinbox->blockSignals(false);
+
+        slider->blockSignals(true);
+        slider->setValue((p.val - p.min) / p.step);
+        slider->blockSignals(false);
+    }
+}
+
+void ShaderParametersDialog::showEvent(QShowEvent *event)
+{
+    refreshWidgets();
+    saved_parameters = *parameters;
+}
+
+void ShaderParametersDialog::closeEvent(QCloseEvent *event)
+{
+    *parameters = saved_parameters;
+}
+
+ShaderParametersDialog::~ShaderParametersDialog()
+{
+}

qt/src/ShaderParametersDialog.hpp

@@ -0,0 +1,28 @@
+#pragma once
+#include <QDialog>
+#include <QSlider>
+#include <QDoubleSpinBox>
+#include <QCheckBox>
+
+#include "EmuCanvas.hpp"
+#include "EmuConfig.hpp"
+
+class ShaderParametersDialog : public QDialog
+{
+  public:
+    ShaderParametersDialog(EmuCanvas *parent, std::vector<EmuCanvas::Parameter> *parameters);
+    ~ShaderParametersDialog();
+
+    void refreshWidgets();
+    void showEvent(QShowEvent *event) override;
+    void closeEvent(QCloseEvent *event) override;
+    void save();
+    void saveAs();
+
+    std::vector<std::tuple<QSlider *, QDoubleSpinBox *, QCheckBox *>> widgets;
+    std::vector<EmuCanvas::Parameter> saved_parameters;
+    std::vector<EmuCanvas::Parameter> *parameters;
+
+    EmuCanvas *canvas = nullptr;
+    EmuConfig *config = nullptr;
+};

qt/src/ShortcutsPanel.cpp

@@ -0,0 +1,48 @@
+#include "ShortcutsPanel.hpp"
+#include "EmuConfig.hpp"
+
+ShortcutsPanel::ShortcutsPanel(EmuApplication *app_)
+    : BindingPanel(app_)
+{
+    setupUi(this);
+    setTableWidget(tableWidget_shortcuts,
+                   app->config->binding.shortcuts,
+                   app->config->allowed_bindings,
+                   app->config->num_shortcuts);
+
+    toolButton_reset_to_default->setPopupMode(QToolButton::InstantPopup);
+
+    for (auto slot = 0; slot < app->config->allowed_bindings; slot++)
+    {
+        auto action = reset_to_default_menu.addAction(tr("Slot %1").arg(slot));
+        QObject::connect(action, &QAction::triggered, [&, slot](bool checked) {
+            setDefaultKeys(slot);
+        });
+    }
+    toolButton_reset_to_default->setMenu(&reset_to_default_menu);
+
+    connect(pushButton_clear_all, &QAbstractButton::clicked, [&](bool) {
+        for (auto &b : app->config->binding.shortcuts)
+            b = {};
+        fillTable();
+    });
+
+    fillTable();
+}
+
+ShortcutsPanel::~ShortcutsPanel()
+{
+}
+
+void ShortcutsPanel::setDefaultKeys(int slot)
+{
+    for (int i = 0; i < app->config->num_shortcuts; i++)
+    {
+        std::string str = EmuConfig::getDefaultShortcutKeys()[i];
+        if (!str.empty())
+            app->config->binding.shortcuts[i * 4 + slot] = EmuBinding::from_config_string(str);
+    }
+
+    fillTable();
+}
+

qt/src/ShortcutsPanel.hpp

@@ -0,0 +1,17 @@
+#pragma once
+#include "ui_ShortcutsPanel.h"
+#include "EmuApplication.hpp"
+#include "BindingPanel.hpp"
+#include <QMenu>
+
+class ShortcutsPanel :
+    public Ui::ShortcutsPanel,
+    public BindingPanel
+{
+  public:
+    ShortcutsPanel(EmuApplication *app);
+    ~ShortcutsPanel();
+
+    void setDefaultKeys(int slot);
+    QMenu reset_to_default_menu;
+};

qt/src/ShortcutsPanel.ui

@@ -0,0 +1,357 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ShortcutsPanel</class>
+ <widget class="QWidget" name="ShortcutsPanel">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>797</width>
+    <height>716</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QToolButton" name="toolButton_reset_to_default">
+       <property name="text">
+        <string>Reset to Default</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="pushButton_clear_all">
+       <property name="text">
+        <string>Clear All</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="horizontalSpacer">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QTableWidget" name="tableWidget_shortcuts">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <row>
+      <property name="text">
+       <string>Open ROM</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Enable Fast-Forward</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle Fast-Forward</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Pause/Continue</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Reset</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Power Cycle Console</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quit</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle Fullscreen</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Save Screenshot</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Save SPC</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Save State to Current Slot</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Load State from Current Slot</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Increase Current Save Slot</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Decrease Current Save Slot</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Save Slot 0</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Save Slot 1</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Save Slot 2</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Save Slot 3</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Save Slot 4</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Save Slot 5</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Save Slot 6</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Save Slot 7</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Save Slot 8</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Save Slot 9</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Load Slot 0</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Load Slot 1</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Load Slot 2</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Load Slot 3</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Load Slot 4</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Load Slot 5</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Load Slot 6</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Load Slot 7</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Load Slot 8</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Quick Load Slot 9</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Rewind</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Grab Mouse</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Swap Controllers 1 and 2</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle BG Layer 0</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle BG Layer 1</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle BG Layer 2</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle BG Layer 3</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle Sprites</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Change Backdrop Color</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle Sound Channel 1</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle Sound Channel 2</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle Sound Channel 3</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle Sound Channel 4</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle Sound Channel 5</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle Sound Channel 6</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle Sound Channel 7</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle Sound Channel 8</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Toggle All Sound Channels</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Start Recording</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Stop Recording</string>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Seek to Frame</string>
+      </property>
+     </row>
+     <column>
+      <property name="text">
+       <string>Binding #1</string>
+      </property>
+     </column>
+     <column>
+      <property name="text">
+       <string>Binding #2</string>
+      </property>
+     </column>
+     <column>
+      <property name="text">
+       <string>Binding #3</string>
+      </property>
+     </column>
+     <column>
+      <property name="text">
+       <string>Binding #4</string>
+      </property>
+     </column>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

qt/src/Snes9xController.cpp

@@ -0,0 +1,749 @@
+#include "Snes9xController.hpp"
+#include "SoftwareScalers.hpp"
+#include <memory>
+#include <filesystem>
+namespace fs = std::filesystem;
+
+#include "snes9x.h"
+#include "memmap.h"
+#include "srtc.h"
+#include "apu/apu.h"
+#include "apu/bapu/snes/snes.hpp"
+#include "gfx.h"
+#include "snapshot.h"
+#include "controls.h"
+#include "cheats.h"
+#include "movie.h"
+#include "display.h"
+#include "conffile.h"
+#include "statemanager.h"
+
+Snes9xController *g_snes9xcontroller = nullptr;
+StateManager g_state_manager;
+
+Snes9xController::Snes9xController()
+{
+    init();
+}
+
+Snes9xController::~Snes9xController()
+{
+    deinit();
+}
+
+Snes9xController *Snes9xController::get()
+{
+    if (!g_snes9xcontroller)
+    {
+        g_snes9xcontroller = new Snes9xController();
+    }
+
+    return g_snes9xcontroller;
+}
+
+void Snes9xController::init()
+{
+    Settings.MouseMaster = true;
+    Settings.SuperScopeMaster = true;
+    Settings.JustifierMaster = true;
+    Settings.MultiPlayer5Master = true;
+    Settings.Transparency = true;
+    Settings.Stereo = true;
+    Settings.ReverseStereo = false;
+    Settings.SixteenBitSound = true;
+    Settings.StopEmulation = true;
+    Settings.HDMATimingHack = 100;
+    Settings.SkipFrames = 0;
+    Settings.TurboSkipFrames = 9;
+    Settings.NetPlay = false;
+
+    Settings.UpAndDown = false;
+    Settings.InterpolationMethod = DSP_INTERPOLATION_GAUSSIAN;
+    Settings.FrameTime = 16639;
+    Settings.FrameTimeNTSC = 16639;
+    Settings.FrameTimePAL = 20000;
+    Settings.DisplayFrameRate = false;
+    Settings.DisplayTime = false;
+    Settings.DisplayFrameRate = false;
+    Settings.DisplayPressedKeys = false;
+    Settings.DisplayIndicators = true;
+    Settings.SoundPlaybackRate = 48000;
+    Settings.SoundInputRate = 32040;
+    Settings.BlockInvalidVRAMAccess = true;
+    Settings.SoundSync = false;
+    Settings.Mute = false;
+    Settings.DynamicRateControl = false;
+    Settings.DynamicRateLimit = 5;
+    Settings.SuperFXClockMultiplier = 100;
+    Settings.MaxSpriteTilesPerLine = 34;
+    Settings.OneClockCycle = 6;
+    Settings.OneSlowClockCycle = 8;
+    Settings.TwoClockCycles = 12;
+    Settings.ShowOverscan = false;
+    Settings.InitialInfoStringTimeout = 120;
+
+    CPU.Flags = 0;
+
+    rewind_buffer_size = 0;
+    rewind_frame_interval = 5;
+
+    Memory.Init();
+    S9xInitAPU();
+    S9xInitSound(0);
+    S9xSetSamplesAvailableCallback([](void *data) {
+        ((Snes9xController *)data)->SamplesAvailable();
+    }, this);
+
+    S9xGraphicsInit();
+    S9xInitInputDevices();
+    S9xUnmapAllControls();
+    S9xCheatsEnable();
+
+    active = false;
+}
+
+void Snes9xController::deinit()
+{
+    if (active)
+        S9xAutoSaveSRAM();
+    S9xGraphicsDeinit();
+    S9xDeinitAPU();
+}
+
+void Snes9xController::updateSettings(const EmuConfig * const config)
+{
+    Settings.UpAndDown = config->allow_opposing_dpad_directions;
+
+    Settings.InterpolationMethod = config->sound_filter;
+
+    if (config->fixed_frame_rate == 0.0)
+    {
+        Settings.FrameTimeNTSC = 16639;
+        Settings.FrameTimePAL = 20000;
+        Settings.FrameTime = Settings.FrameTimeNTSC;
+    }
+    else
+    {
+        Settings.FrameTimeNTSC = Settings.FrameTimePAL = Settings.FrameTime =
+            1000000 / config->fixed_frame_rate;
+    }
+
+    Settings.TurboSkipFrames = config->fast_forward_skip_frames;
+
+    Settings.DisplayTime = config->show_time;
+
+    if (config->display_messages == EmuConfig::eInscreen)
+        Settings.AutoDisplayMessages = true;
+    else
+        Settings.AutoDisplayMessages = false;
+
+    Settings.DisplayFrameRate = config->show_frame_rate;
+
+    Settings.DisplayPressedKeys = config->show_pressed_keys;
+
+    Settings.DisplayIndicators = config->show_indicators;
+
+    if (Settings.SoundPlaybackRate != config->playback_rate || Settings.SoundInputRate != config->input_rate)
+    {
+        Settings.SoundInputRate = config->input_rate;
+        Settings.SoundPlaybackRate = config->playback_rate;
+        S9xUpdateDynamicRate();
+    }
+
+    Settings.BlockInvalidVRAMAccess = !config->allow_invalid_vram_access;
+
+    Settings.SoundSync = config->speed_sync_method == EmuConfig::eSoundSync;
+
+    Settings.Mute = config->mute_audio;
+
+    Settings.DynamicRateControl = config->dynamic_rate_control;
+
+    Settings.DynamicRateLimit = config->dynamic_rate_limit * 1000;
+
+    Settings.SuperFXClockMultiplier  = config->superfx_clock_multiplier;
+
+    if (rewind_buffer_size != config->rewind_buffer_size && active)
+    {
+        g_state_manager.init(config->rewind_buffer_size * 1048576);
+    }
+    rewind_buffer_size = config->rewind_buffer_size;
+    rewind_frame_interval = config->rewind_frame_interval;
+
+    if (config->remove_sprite_limit)
+        Settings.MaxSpriteTilesPerLine = 128;
+    else
+        Settings.MaxSpriteTilesPerLine = 34;
+
+    if (!config->overclock)
+    {
+        Settings.OneClockCycle = 6;
+        Settings.OneSlowClockCycle = 8;
+        Settings.TwoClockCycles = 12;
+    }
+    else
+    {
+        Settings.OneClockCycle = 2;
+        Settings.OneSlowClockCycle = 3;
+        Settings.TwoClockCycles = 4;
+    }
+
+    Settings.ShowOverscan = config->show_overscan;
+
+    high_resolution_effect = config->high_resolution_effect;
+
+    config_folder = config->findConfigDir();
+
+    auto doFolder = [&](int location, std::string &dest, const std::string &src, const char *subfolder_name)
+    {
+        if (location == EmuConfig::eROMDirectory)
+            dest = "";
+        else if (location == EmuConfig::eConfigDirectory)
+            dest = config_folder + "/" + subfolder_name;
+        else
+            dest = src;
+    };
+
+    doFolder(config->sram_location, sram_folder, config->sram_folder, "sram");
+    doFolder(config->state_location, state_folder, config->state_folder, "state");
+    doFolder(config->cheat_location, cheat_folder, config->cheat_folder, "cheat");
+    doFolder(config->patch_location, patch_folder, config->patch_folder, "patch");
+    doFolder(config->export_location, export_folder, config->export_folder, "export");
+}
+
+bool Snes9xController::openFile(std::string filename)
+{
+    if (active)
+        S9xAutoSaveSRAM();
+    active = false;
+    auto result = Memory.LoadROM(filename.c_str());
+    if (result)
+    {
+        active = true;
+        Memory.LoadSRAM(S9xGetFilename(".srm", SRAM_DIR).c_str());
+    }
+    return active;
+}
+
+void Snes9xController::mainLoop()
+{
+    if (!active)
+        return;
+
+    if (rewind_buffer_size > 0)
+    {
+        if (rewinding)
+        {
+            uint16 joypads[8];
+            for (int i = 0; i < 8; i++)
+                joypads[i] = MovieGetJoypad(i);
+
+            rewinding = g_state_manager.pop();
+
+            for (int i = 0; i < 8; i++)
+                MovieSetJoypad(i, joypads[i]);
+        }
+        else if (IPPU.TotalEmulatedFrames % rewind_frame_interval == 0)
+            g_state_manager.push();
+
+        if (rewinding)
+            Settings.Mute |= 0x80;
+        else
+            Settings.Mute &= ~0x80;
+    }
+
+    S9xMainLoop();
+}
+
+void Snes9xController::setPaused(bool paused)
+{
+    Settings.Paused = paused;
+}
+
+void Snes9xController::updateSoundBufferLevel(int empty, int total)
+{
+    S9xUpdateDynamicRate(empty, total);
+}
+
+bool8 S9xDeinitUpdate(int width, int height)
+{
+    static int last_width = 0;
+    static int last_height = 0;
+    int yoffset = 0;
+
+    auto &display = Snes9xController::get()->screen_output_function;
+    if (display == nullptr)
+        return true;
+
+    if (width < 256 || height < 224)
+        return false;
+
+    if (last_height > height)
+        memset(GFX.Screen + GFX.RealPPL * height, 0, GFX.Pitch * (last_height - height));
+
+    last_width = width;
+    last_height = height;
+
+    if (Settings.ShowOverscan)
+    {
+        if (height == SNES_HEIGHT)
+        {
+            yoffset = -8;
+            height = SNES_HEIGHT_EXTENDED;
+        }
+        if (height == SNES_HEIGHT * 2)
+        {
+            yoffset = -16;
+            height = SNES_HEIGHT_EXTENDED * 2;
+        }
+    }
+    else
+    {
+        if (height == SNES_HEIGHT_EXTENDED)
+        {
+            yoffset = 7;
+            height = SNES_HEIGHT;
+        }
+        if (height == SNES_HEIGHT_EXTENDED * 2)
+        {
+            yoffset = 14;
+            height = SNES_HEIGHT * 2;
+        }
+    }
+
+    uint16_t *screen_view = GFX.Screen + (yoffset * (int)GFX.RealPPL);
+
+    auto hires_effect = Snes9xController::get()->high_resolution_effect;
+    if (!Settings.Paused)
+    {
+        if (hires_effect == EmuConfig::eScaleUp)
+        {
+            S9xForceHires(screen_view, GFX.Pitch, width, height);
+            last_width = width;
+        }
+        else if (hires_effect == EmuConfig::eScaleDown)
+        {
+            S9xMergeHires(screen_view, GFX.Pitch, width, height);
+            last_width = width;
+        }
+    }
+
+    display(screen_view, width, height, GFX.Pitch, Settings.PAL ? 50.0 : 60.098813);
+
+    return true;
+}
+
+bool8 S9xContinueUpdate(int width, int height)
+{
+    return S9xDeinitUpdate(width, height);
+}
+
+void S9xSyncSpeed()
+{
+    if (Settings.TurboMode)
+    {
+        IPPU.FrameSkip++;
+        if ((IPPU.FrameSkip > Settings.TurboSkipFrames) && !Settings.HighSpeedSeek)
+        {
+            IPPU.FrameSkip = 0;
+            IPPU.SkippedFrames = 0;
+            IPPU.RenderThisFrame = true;
+        }
+        else
+        {
+            IPPU.SkippedFrames++;
+            IPPU.RenderThisFrame = false;
+        }
+
+        return;
+    }
+
+    IPPU.RenderThisFrame = true;
+
+}
+
+void S9xParsePortConfig(ConfigFile&, int)
+{
+}
+
+std::string S9xGetDirectory(s9x_getdirtype dirtype)
+{
+    std::string dirname;
+    auto c = Snes9xController::get();
+
+    switch (dirtype)
+    {
+    case HOME_DIR:
+        dirname = c->config_folder;
+        break;
+
+    case SNAPSHOT_DIR:
+        dirname = c->state_folder;
+        break;
+
+    case PATCH_DIR:
+        dirname = c->patch_folder;
+        break;
+
+    case CHEAT_DIR:
+        dirname = c->cheat_folder;
+        break;
+
+    case SRAM_DIR:
+        dirname = c->sram_folder;
+        break;
+
+    case SCREENSHOT_DIR:
+    case SPC_DIR:
+        dirname = c->export_folder;
+        break;
+
+    default:
+        dirname = "";
+    }
+
+    /* Check if directory exists, make it and/or set correct permissions */
+    if (dirtype != HOME_DIR && dirname != "")
+    {
+        fs::path path(dirname);
+
+        if (!fs::exists(path))
+        {
+            fs::create_directory(path);
+        }
+        else if ((fs::status(path).permissions() & fs::perms::owner_write) == fs::perms::none)
+        {
+            fs::permissions(path, fs::perms::owner_write, fs::perm_options::add);
+        }
+    }
+
+    /* Anything else, use ROM filename path */
+    if (dirname == "" && !Memory.ROMFilename.empty())
+    {
+        fs::path path(Memory.ROMFilename);
+
+        path.remove_filename();
+
+        if (!fs::is_directory(path))
+            dirname = fs::current_path().u8string();
+        else
+            dirname = path.u8string();
+    }
+
+    return dirname;
+}
+
+void S9xInitInputDevices()
+{
+}
+
+void S9xHandlePortCommand(s9xcommand_t, short, short)
+{
+}
+
+bool S9xPollButton(unsigned int, bool *)
+{
+    return false;
+}
+
+void S9xToggleSoundChannel(int c)
+{
+    static int sound_switch = 255;
+
+    if (c == 8)
+        sound_switch = 255;
+    else
+        sound_switch ^= 1 << c;
+
+    S9xSetSoundControl(sound_switch);
+}
+
+std::string S9xGetFilenameInc(std::string e, enum s9x_getdirtype dirtype)
+{
+    fs::path rom_filename(Memory.ROMFilename);
+
+    fs::path filename_base(S9xGetDirectory(dirtype));
+    filename_base /= rom_filename.filename();
+
+    fs::path new_filename;
+
+    if (e[0] != '.')
+        e = "." + e;
+    int i = 0;
+    do
+    {
+        std::string new_extension = std::to_string(i);
+        while (new_extension.length() < 3)
+            new_extension = "0" + new_extension;
+        new_extension += e;
+
+        new_filename = filename_base;
+        new_filename.replace_extension(new_extension);
+
+        i++;
+    } while (fs::exists(new_filename));
+
+    return new_filename.u8string();
+}
+
+bool8 S9xInitUpdate()
+{
+    return true;
+}
+
+void S9xExtraUsage()
+{
+}
+
+bool8 S9xOpenSoundDevice()
+{
+    return true;
+}
+
+bool S9xPollAxis(unsigned int axis, short *value)
+{
+    return true;
+}
+
+void S9xParseArg(char *argv[], int &index, int argc)
+{
+}
+
+void S9xExit()
+{
+}
+
+bool S9xPollPointer(unsigned int, short *, short *)
+{
+    return false;
+}
+
+void Snes9xController::SamplesAvailable()
+{
+    static std::vector<int16_t> data;
+    if (sound_output_function)
+    {
+        int samples = S9xGetSampleCount();
+        if (data.size() < samples)
+            data.resize(samples);
+        S9xMixSamples((uint8_t *)data.data(), samples);
+        sound_output_function(data.data(), samples);
+    }
+    else
+    {
+        S9xClearSamples();
+    }
+}
+
+void S9xMessage(int message_class, int type, const char *message)
+{
+    S9xSetInfoString(message);
+}
+
+const char *S9xStringInput(const char *prompt)
+{
+    return "";
+}
+
+bool8 S9xOpenSnapshotFile(const char *filename, bool8 read_only, STREAM *file)
+{
+    if (read_only)
+    {
+        if ((*file = OPEN_STREAM(filename, "rb")))
+            return (true);
+        else
+            fprintf(stderr, "Failed to open file stream for reading.\n");
+    }
+    else
+    {
+        if ((*file = OPEN_STREAM(filename, "wb")))
+        {
+            return (true);
+        }
+        else
+        {
+            fprintf(stderr, "Couldn't open stream with zlib.\n");
+        }
+    }
+
+    fprintf(stderr, "Couldn't open snapshot file:\n%s\n", filename);
+
+    return false;
+}
+
+void S9xCloseSnapshotFile(STREAM file)
+{
+    CLOSE_STREAM(file);
+}
+
+void S9xAutoSaveSRAM()
+{
+    Memory.SaveSRAM(S9xGetFilename(".srm", SRAM_DIR).c_str());
+    S9xSaveCheatFile(S9xGetFilename(".cht", CHEAT_DIR).c_str());
+}
+
+bool Snes9xController::acceptsCommand(const char *command)
+{
+    auto cmd = S9xGetCommandT(command);
+    return !(cmd.type == S9xNoMapping || cmd.type == S9xBadMapping);
+}
+
+void Snes9xController::updateBindings(const EmuConfig *const config)
+{
+    const char *snes9x_names[] = {
+        "Up",
+        "Down",
+        "Left",
+        "Right",
+        "A",
+        "B",
+        "X",
+        "Y",
+        "L",
+        "R",
+        "Start",
+        "Select",
+        "Turbo A",
+        "Turbo B",
+        "Turbo X",
+        "Turbo Y",
+        "Turbo L",
+        "Turbo R",
+    };
+
+    S9xUnmapAllControls();
+
+    S9xSetController(0, CTL_JOYPAD, 0, 0, 0, 0);
+
+
+    for (int controller_number = 0; controller_number < 5; controller_number++)
+    {
+        auto &controller = config->binding.controller[controller_number];
+        for (int i = 0; i < config->num_controller_bindings; i++)
+        {
+            for (int b = 0; b < config->allowed_bindings; b++)
+            {
+                auto binding = controller.buttons[i * config->allowed_bindings + b];
+                if (binding.hash() == 0)
+                    continue;
+                std::string name = "Joypad" +
+                                    std::to_string(controller_number + 1) + " " +
+                                    snes9x_names[i];
+                auto cmd = S9xGetCommandT(name.c_str());
+                S9xMapButton(binding.hash(), cmd, false);
+            }
+        }
+    }
+
+    for (int i = 0; i < config->num_shortcuts; i++)
+    {
+        auto command = S9xGetCommandT(EmuConfig::getShortcutNames()[i]);
+        if (command.type == S9xNoMapping)
+            continue;
+
+        for (int b = 0; b < 4; b++)
+        {
+            auto binding = config->binding.shortcuts[i * 4 + b];
+            if (binding.type != 0)
+                S9xMapButton(binding.hash(), command, false);
+        }
+    }
+}
+
+void Snes9xController::reportBinding(EmuBinding b, bool active)
+{
+    S9xReportButton(b.hash(), active);
+}
+
+static fs::path save_slot_path(int slot)
+{
+    std::string extension = std::to_string(slot);
+    while (extension.length() < 3)
+        extension = "0" + extension;
+    fs::path path(S9xGetDirectory(SNAPSHOT_DIR));
+    path /= fs::path(Memory.ROMFilename).filename();
+    path.replace_extension(extension);
+    return path;
+}
+
+void Snes9xController::loadUndoState()
+{
+    S9xUnfreezeGame(S9xGetFilename(".undo", SNAPSHOT_DIR).c_str());
+}
+
+std::string Snes9xController::getStateFolder()
+{
+    return S9xGetDirectory(SNAPSHOT_DIR);
+}
+
+bool Snes9xController::loadState(int slot)
+{
+    return loadState(save_slot_path(slot).u8string());
+}
+
+bool Snes9xController::loadState(std::string filename)
+{
+    if (!active)
+        return false;
+
+    S9xFreezeGame(S9xGetFilename(".undo", SNAPSHOT_DIR).c_str());
+
+    if (S9xUnfreezeGame(filename.c_str()))
+    {
+        auto info_string = filename + " loaded";
+        S9xSetInfoString(info_string.c_str());
+        return true;
+    }
+    else
+    {
+        fprintf(stderr, "Failed to load state file: %s\n", filename.c_str());
+        return false;
+    }
+}
+
+bool Snes9xController::saveState(std::string filename)
+{
+    if (!active)
+        return false;
+
+    if (S9xFreezeGame(filename.c_str()))
+    {
+        auto info_string = filename + " saved";
+        S9xSetInfoString(info_string.c_str());
+        return true;
+    }
+    else
+    {
+        fprintf(stderr, "Couldn't save state file: %s\n", filename.c_str());
+        return false;
+    }
+}
+
+void Snes9xController::mute(bool muted)
+{
+    Settings.Mute = muted;
+}
+
+bool Snes9xController::isAbnormalSpeed()
+{
+    return (Settings.TurboMode || rewinding);
+}
+
+void Snes9xController::reset()
+{
+    S9xReset();
+}
+
+void Snes9xController::softReset()
+{
+    S9xSoftReset();
+}
+
+bool Snes9xController::saveState(int slot)
+{
+    return saveState(save_slot_path(slot).u8string());
+}
+
+void Snes9xController::setMessage(std::string message)
+{
+    S9xSetInfoString(message.c_str());
+}

qt/src/Snes9xController.hpp

@@ -0,0 +1,64 @@
+#ifndef __SNES9X_CONTROLLER_HPP
+#define __SNES9X_CONTROLLER_HPP
+#include <functional>
+#include <vector>
+#include <cstdint>
+#include <string>
+#include <memory>
+
+#include "EmuConfig.hpp"
+
+class Snes9xController
+{
+  public:
+    static Snes9xController *get();
+
+    void init();
+    void deinit();
+    void mainLoop();
+    bool openFile(std::string filename);
+    bool loadState(std::string filename);
+    bool loadState(int slot);
+    void loadUndoState();
+    bool saveState(std::string filename);
+    bool saveState(int slot);
+    void increaseSaveSlot();
+    void decreaseSaveSlot();
+    void updateSettings(const EmuConfig * const config);
+    void updateBindings(const EmuConfig * const config);
+    void reportBinding(EmuBinding b, bool active);
+    void updateSoundBufferLevel(int, int);
+    bool acceptsCommand(const char *command);
+    bool isAbnormalSpeed();
+    void mute(bool muted);
+    void reset();
+    void softReset();
+    void setPaused(bool paused);
+    void setMessage(std::string message);
+    std::string getStateFolder();
+    std::string config_folder;
+    std::string sram_folder;
+    std::string state_folder;
+    std::string cheat_folder;
+    std::string patch_folder;
+    std::string export_folder;
+    int high_resolution_effect;
+    int rewind_buffer_size;
+    int rewind_frame_interval;
+    bool rewinding = false;
+
+    std::function<void(uint16_t *, int, int, int, double)> screen_output_function = nullptr;
+    std::function<void(int16_t *, int)> sound_output_function = nullptr;
+
+    bool active = false;
+
+  protected:
+    Snes9xController();
+    ~Snes9xController();
+
+  private:
+    void SamplesAvailable();
+
+};
+
+#endif

qt/src/SoftwareScalers.cpp

@@ -0,0 +1,43 @@
+#include <cstdint>
+
+void S9xForceHires(void *buffer, int pitch, int &width, int &height)
+{
+    if (width <= 256)
+    {
+        for (int y = (height)-1; y >= 0; y--)
+        {
+            uint16_t *line = (uint16_t *)((uint8_t *)buffer + y * pitch);
+
+            for (int x = (width * 2) - 1; x >= 0; x--)
+            {
+                *(line + x) = *(line + (x >> 1));
+            }
+        }
+
+        width *= 2;
+    }
+}
+
+static inline uint16_t average_565(uint16_t colora, uint16_t colorb)
+{
+    return (((colora) & (colorb)) + ((((colora) ^ (colorb)) & 0xF7DE) >> 1));
+}
+void S9xMergeHires(void *buffer, int pitch, int &width, int &height)
+{
+    if (width < 512)
+        return;
+
+    for (int y = 0; y < height; y++)
+    {
+        uint16_t *input = (uint16_t *)((uint8_t *)buffer + y * pitch);
+        uint16_t *output = input;
+
+        for (int x = 0; x < (width >> 1); x++)
+        {
+            *output++ = average_565(input[0], input[1]);
+            input += 2;
+        }
+    }
+
+    width >>= 1;
+}

qt/src/SoftwareScalers.hpp

@@ -0,0 +1,4 @@
+#pragma once
+
+void S9xForceHires(void *buffer, int pitch, int &width, int &height);
+void S9xMergeHires(void *buffer, int pitch, int &width, int &height);

qt/src/SoundPanel.cpp

@@ -0,0 +1,131 @@
+#include "SoundPanel.hpp"
+#include <QScreen>
+
+static const int playback_rates[] = { 96000, 48000, 44100 };
+
+SoundPanel::SoundPanel(EmuApplication *app_)
+    : app(app_)
+{
+    setupUi(this);
+
+    connect(comboBox_driver, &QComboBox::activated, [&](int index){
+        if (app->config->sound_driver != driver_list[index])
+        {
+            app->config->sound_driver = driver_list[index];
+            app->restartAudio();
+        }
+    });
+
+    connect(comboBox_playback_rate, &QComboBox::activated, [&](int index)
+    {
+        if (index < 3)
+        {
+            if (playback_rates[index] != app->config->playback_rate)
+            {
+                app->config->playback_rate = playback_rates[index];
+                app->restartAudio();
+                app->updateSettings();
+            }
+        }
+    });
+
+    connect(spinBox_buffer_size, &QSpinBox::valueChanged, [&](int value) {
+        app->config->audio_buffer_size_ms = value;
+        app->restartAudio();
+    });
+
+    connect(checkBox_adjust_input_rate, &QCheckBox::clicked, [&](bool checked) {
+        app->config->adjust_input_rate_automatically = checked;
+        if (checked)
+        {
+            int calculated = screen()->refreshRate() / 60.09881 * 32040;
+            horizontalSlider_input_rate->setValue(calculated);
+        }
+
+        horizontalSlider_input_rate->setDisabled(checked);
+        app->updateSettings();
+    });
+
+    connect(horizontalSlider_input_rate, &QSlider::valueChanged, [&](int value) {
+        app->config->input_rate = value;
+        setInputRateText(value);
+        app->updateSettings();
+    });
+
+    connect(checkBox_dynamic_rate_control, &QCheckBox::clicked, [&](bool checked) {
+        app->config->dynamic_rate_control = checked;
+        app->updateSettings();
+    });
+
+    connect(doubleSpinBox_dynamic_rate_limit, &QDoubleSpinBox::valueChanged, [&](double value) {
+        app->config->dynamic_rate_limit = value;
+        app->updateSettings();
+    });
+
+    connect(checkBox_mute_sound, &QCheckBox::toggled, [&](bool checked) {
+        app->config->mute_audio = checked;
+    });
+
+    connect(checkBox_mute_during_alt_speed, &QCheckBox::toggled, [&](bool checked) {
+        app->config->mute_audio_during_alternate_speed = checked;
+    });
+}
+
+SoundPanel::~SoundPanel()
+{
+}
+
+void SoundPanel::setInputRateText(int value)
+{
+    double hz = value / 32040.0 * 60.09881;
+    label_input_rate->setText(QString("%1\n%2 Hz").arg(value).arg(hz, 6, 'g', 6));
+}
+
+void SoundPanel::showEvent(QShowEvent *event)
+{
+    auto &config = app->config;
+
+    comboBox_driver->clear();
+    comboBox_driver->addItem("SDL");
+    comboBox_driver->addItem("PortAudio");
+    comboBox_driver->addItem("Cubeb");
+
+    driver_list.clear();
+    driver_list.push_back("sdl");
+    driver_list.push_back("portaudio");
+    driver_list.push_back("cubeb");
+
+    for (int i = 0; i < driver_list.size(); i++)
+    {
+        if (driver_list[i] == config->sound_driver)
+        {
+            comboBox_driver->setCurrentIndex(i);
+            break;
+        }
+    }
+
+    comboBox_device->clear();
+    comboBox_device->addItem("Default");
+
+    comboBox_playback_rate->clear();
+    comboBox_playback_rate->addItem("96000Hz");
+    comboBox_playback_rate->addItem("48000Hz");
+    comboBox_playback_rate->addItem("44100Hz");
+    int pbr_index = 1;
+    if (config->playback_rate == 96000)
+        pbr_index = 0;
+    else if (config->playback_rate == 44100)
+        pbr_index = 2;
+
+    comboBox_playback_rate->setCurrentIndex(pbr_index);
+    spinBox_buffer_size->setValue(config->audio_buffer_size_ms);
+
+    checkBox_adjust_input_rate->setChecked(config->adjust_input_rate_automatically);
+    setInputRateText(config->input_rate);
+    checkBox_dynamic_rate_control->setChecked(config->dynamic_rate_control);
+    doubleSpinBox_dynamic_rate_limit->setValue(config->dynamic_rate_limit);
+
+    checkBox_mute_sound->setChecked(config->mute_audio);
+    checkBox_mute_during_alt_speed->setChecked(config->mute_audio_during_alternate_speed);
+}
+

qt/src/SoundPanel.hpp

@@ -0,0 +1,18 @@
+#pragma once
+#include "ui_SoundPanel.h"
+#include "EmuApplication.hpp"
+#include <QMenu>
+
+class SoundPanel :
+    public Ui::SoundPanel,
+    public QWidget
+{
+  public:
+    SoundPanel(EmuApplication *app);
+    ~SoundPanel();
+    EmuApplication *app;
+    void showEvent(QShowEvent *event) override;
+    void setInputRateText(int value);
+
+    std::vector<std::string> driver_list;
+};

qt/src/SoundPanel.ui

@@ -0,0 +1,302 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>SoundPanel</class>
+ <widget class="QWidget" name="SoundPanel">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>705</width>
+    <height>596</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="groupBox">
+     <property name="title">
+      <string>Sound Output</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_2">
+      <item>
+       <layout class="QGridLayout" name="gridLayout" rowminimumheight="0,0,0,0">
+        <item row="3" column="1" colspan="2">
+         <widget class="QSpinBox" name="spinBox_buffer_size">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="suffix">
+           <string> ms</string>
+          </property>
+          <property name="minimum">
+           <number>16</number>
+          </property>
+          <property name="maximum">
+           <number>256</number>
+          </property>
+          <property name="value">
+           <number>32</number>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="1">
+         <widget class="QComboBox" name="comboBox_playback_rate">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <item>
+           <property name="text">
+            <string>48000 Hz</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>44100 Hz</string>
+           </property>
+          </item>
+         </widget>
+        </item>
+        <item row="3" column="0">
+         <widget class="QLabel" name="label_5">
+          <property name="text">
+           <string>Buffer size:</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="0">
+         <widget class="QLabel" name="label_2">
+          <property name="text">
+           <string>Device:</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="1">
+         <widget class="QComboBox" name="comboBox_device">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="toolTip">
+           <string>Choose a device to render output. If you have no integrated graphics, there will be only one choice.</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="2">
+         <spacer name="horizontalSpacer">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+        <item row="0" column="0">
+         <widget class="QLabel" name="label">
+          <property name="text">
+           <string>Driver:</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="1">
+         <widget class="QComboBox" name="comboBox_driver">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="toolTip">
+           <string>Select the output driver.</string>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="0">
+         <widget class="QLabel" name="label_3">
+          <property name="text">
+           <string>Playback rate:</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_2">
+     <property name="title">
+      <string>Sound Stretching</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_3">
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout_5">
+        <item>
+         <widget class="QCheckBox" name="checkBox_dynamic_rate_control">
+          <property name="text">
+           <string>Dynamic rate control</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QCheckBox" name="checkBox_adjust_input_rate">
+          <property name="text">
+           <string>Adjust input rate to display rate automatically</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout_2">
+        <item>
+         <widget class="QLabel" name="label_4">
+          <property name="text">
+           <string>Input rate:</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QLabel" name="label_input_rate">
+          <property name="text">
+           <string>31987</string>
+          </property>
+          <property name="alignment">
+           <set>Qt::AlignCenter</set>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <layout class="QHBoxLayout" name="horizontalLayout">
+          <item>
+           <widget class="QSlider" name="horizontalSlider_input_rate">
+            <property name="minimum">
+             <number>31800</number>
+            </property>
+            <property name="maximum">
+             <number>32200</number>
+            </property>
+            <property name="value">
+             <number>31987</number>
+            </property>
+            <property name="orientation">
+             <enum>Qt::Horizontal</enum>
+            </property>
+            <property name="tickPosition">
+             <enum>QSlider::NoTicks</enum>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout_3">
+        <item>
+         <widget class="QLabel" name="label_6">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Fixed" vsizetype="Preferred">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="text">
+           <string>Dynamic rate limit:</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QDoubleSpinBox" name="doubleSpinBox_dynamic_rate_limit">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="decimals">
+           <number>3</number>
+          </property>
+          <property name="maximum">
+           <double>0.050000000000000</double>
+          </property>
+          <property name="singleStep">
+           <double>0.001000000000000</double>
+          </property>
+          <property name="value">
+           <double>0.005000000000000</double>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <spacer name="horizontalSpacer_2">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_3">
+     <property name="title">
+      <string>Mute</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout_4">
+      <item>
+       <widget class="QCheckBox" name="checkBox_mute_sound">
+        <property name="text">
+         <string>Mute all sound</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QCheckBox" name="checkBox_mute_during_alt_speed">
+        <property name="text">
+         <string>Mute sound during turbo or rewind</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>40</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

qt/src/main.cpp

@@ -0,0 +1,23 @@
+#include "EmuApplication.hpp"
+
+int main(int argc, char *argv[])
+{
+    EmuApplication emu;
+    emu.qtapp = std::make_unique<QApplication>(argc, argv);
+
+    emu.config = std::make_unique<EmuConfig>();
+    emu.config->setDefaults();
+    emu.config->loadFile(EmuConfig::findConfigFile());
+
+    emu.input_manager = std::make_unique<SDLInputManager>();
+    emu.window = std::make_unique<EmuMainWindow>(&emu);
+    emu.window->show();
+
+    emu.updateBindings();
+    emu.startIdleLoop();
+    emu.qtapp->exec();
+
+    emu.config->saveFile(EmuConfig::findConfigFile());
+
+    return 0;
+}

qt/src/resources/blackicons/a.svg

@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="16.0px"
+   height="16.0px"
+   viewBox="0 0 16.0 16.0"
+   version="1.1"
+   id="SVGRoot"
+   sodipodi:docname="a.svg"
+   inkscape:version="1.2.2 (b0a8486541, 2022-12-01)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview4430"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     showgrid="true"
+     inkscape:zoom="38.057741"
+     inkscape:cx="4.611414"
+     inkscape:cy="8.2637591"
+     inkscape:window-width="1920"
+     inkscape:window-height="1021"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1">
+    <inkscape:grid
+       type="xygrid"
+       id="grid4436" />
+  </sodipodi:namedview>
+  <defs
+     id="defs4425" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <circle
+       style="opacity:1;fill:none;fill-opacity:0.5;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495"
+       cx="8"
+       cy="3"
+       r="2.5" />
+    <circle
+       style="fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495-3"
+       cx="3"
+       cy="8"
+       r="2.5" />
+    <circle
+       style="fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495-6"
+       cx="8"
+       cy="13"
+       r="2.5" />
+    <circle
+       style="fill:#000000;fill-opacity:0.5;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495-7"
+       cx="13"
+       cy="8"
+       r="2.5" />
+  </g>
+</svg>

qt/src/resources/blackicons/b.svg

@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="16.0px"
+   height="16.0px"
+   viewBox="0 0 16.0 16.0"
+   version="1.1"
+   id="SVGRoot"
+   sodipodi:docname="b.svg"
+   inkscape:version="1.2.2 (b0a8486541, 2022-12-01)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview4430"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     showgrid="true"
+     inkscape:zoom="38.057741"
+     inkscape:cx="4.611414"
+     inkscape:cy="8.2637591"
+     inkscape:window-width="1920"
+     inkscape:window-height="1021"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1">
+    <inkscape:grid
+       type="xygrid"
+       id="grid4436" />
+  </sodipodi:namedview>
+  <defs
+     id="defs4425" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <circle
+       style="opacity:1;fill:none;fill-opacity:0.5;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495"
+       cx="8"
+       cy="3"
+       r="2.5" />
+    <circle
+       style="fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495-3"
+       cx="3"
+       cy="8"
+       r="2.5" />
+    <circle
+       style="fill:#000000;fill-opacity:0.5;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495-6"
+       cx="8"
+       cy="13"
+       r="2.5" />
+    <circle
+       style="fill:none;fill-opacity:0.5;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495-7"
+       cx="13"
+       cy="8"
+       r="2.5" />
+  </g>
+</svg>

qt/src/resources/blackicons/display.svg

@@ -0,0 +1 @@
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qt/src/resources/blackicons/down.svg

@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="16"
+   height="16"
+   viewBox="0 0 16 16"
+   version="1.1"
+   id="svg5"
+   inkscape:version="1.2.2 (b0a8486541, 2022-12-01)"
+   sodipodi:docname="down.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview7"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     showgrid="true"
+     inkscape:zoom="41.7193"
+     inkscape:cx="3.3917156"
+     inkscape:cy="7.5624471"
+     inkscape:window-width="1920"
+     inkscape:window-height="1021"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1">
+    <inkscape:grid
+       type="xygrid"
+       id="grid9"
+       spacingx="0.5"
+       spacingy="0.5"
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+  <defs
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+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
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+    <path
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+       width="4"
+       height="5"
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qt/src/resources/blackicons/emulation.svg

@@ -0,0 +1 @@
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qt/src/resources/blackicons/folders.svg

@@ -0,0 +1 @@
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qt/src/resources/blackicons/joypad.svg

@@ -0,0 +1,47 @@
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+<svg
+   viewBox="0 0 16 16"
+   version="1.1"
+   id="svg4"
+   sodipodi:docname="joypad.svg"
+   inkscape:version="1.2.2 (b0a8486541, 2022-12-01)"
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+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs8" />
+  <sodipodi:namedview
+     id="namedview6"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
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qt/src/resources/blackicons/key.svg

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+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
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+   height="16"
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+   inkscape:version="1.2.2 (b0a8486541, 2022-12-01)"
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qt/src/resources/blackicons/keyboard.svg

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qt/src/resources/blackicons/l.svg

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qt/src/resources/blackicons/right.svg

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qt/src/resources/blackicons/select.svg

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qt/src/resources/blackicons/settings.svg

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qt/src/resources/blackicons/shader.svg

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qt/src/resources/blackicons/sound.svg

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qt/src/resources/blackicons/x.svg

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+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     showgrid="true"
+     inkscape:zoom="38.057741"
+     inkscape:cx="4.611414"
+     inkscape:cy="8.2637591"
+     inkscape:window-width="1920"
+     inkscape:window-height="1021"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1">
+    <inkscape:grid
+       type="xygrid"
+       id="grid4436" />
+  </sodipodi:namedview>
+  <defs
+     id="defs4425" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <circle
+       style="opacity:1;fill:#000000;fill-opacity:0.5;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495"
+       cx="8"
+       cy="3"
+       r="2.5" />
+    <circle
+       style="fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495-3"
+       cx="3"
+       cy="8"
+       r="2.5" />
+    <circle
+       style="fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495-6"
+       cx="8"
+       cy="13"
+       r="2.5" />
+    <circle
+       style="fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495-7"
+       cx="13"
+       cy="8"
+       r="2.5" />
+  </g>
+</svg>

qt/src/resources/blackicons/y.svg

@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="16.0px"
+   height="16.0px"
+   viewBox="0 0 16.0 16.0"
+   version="1.1"
+   id="SVGRoot"
+   sodipodi:docname="y.svg"
+   inkscape:version="1.2.2 (b0a8486541, 2022-12-01)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview4430"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     showgrid="true"
+     inkscape:zoom="38.057741"
+     inkscape:cx="4.611414"
+     inkscape:cy="8.2637591"
+     inkscape:window-width="1920"
+     inkscape:window-height="1021"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1">
+    <inkscape:grid
+       type="xygrid"
+       id="grid4436" />
+  </sodipodi:namedview>
+  <defs
+     id="defs4425" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <circle
+       style="opacity:1;fill:none;fill-opacity:0.5;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495"
+       cx="8"
+       cy="3"
+       r="2.5" />
+    <circle
+       style="fill:#000000;fill-opacity:0.5;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495-3"
+       cx="3"
+       cy="8"
+       r="2.5" />
+    <circle
+       style="fill:none;fill-opacity:0.5;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495-6"
+       cx="8"
+       cy="13"
+       r="2.5" />
+    <circle
+       style="fill:none;fill-opacity:0.5;stroke:#000000;stroke-width:1;stroke-linecap:round;stroke-linejoin:bevel;stroke-dasharray:none;stroke-opacity:1"
+       id="path4495-7"
+       cx="13"
+       cy="8"
+       r="2.5" />
+  </g>
+</svg>

qt/src/resources/snes9x.qrc

@@ -0,0 +1,25 @@
+<RCC>
+  <qresource prefix="icons">
+    <file>blackicons/settings.svg</file>
+    <file>blackicons/folders.svg</file>
+    <file>blackicons/emulation.svg</file>
+    <file>blackicons/sound.svg</file>
+    <file>blackicons/keyboard.svg</file>
+    <file>blackicons/display.svg</file>
+    <file>blackicons/joypad.svg</file>
+    <file>blackicons/key.svg</file>
+    <file>blackicons/a.svg</file>
+    <file>blackicons/b.svg</file>
+    <file>blackicons/l.svg</file>
+    <file>blackicons/left.svg</file>
+    <file>blackicons/down.svg</file>
+    <file>blackicons/r.svg</file>
+    <file>blackicons/right.svg</file>
+    <file>blackicons/select.svg</file>
+    <file>blackicons/start.svg</file>
+    <file>blackicons/up.svg</file>
+    <file>blackicons/x.svg</file>
+    <file>blackicons/y.svg</file>
+    <file>blackicons/shader.svg</file>
+  </qresource>
+</RCC>

qt/src/resources/untitled.ui

@@ -0,0 +1,175 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Dialog</class>
+ <widget class="QDialog" name="Dialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>895</width>
+    <height>651</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Dialog</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QTableWidget" name="tableWidget">
+     <property name="showGrid">
+      <bool>true</bool>
+     </property>
+     <property name="gridStyle">
+      <enum>Qt::SolidLine</enum>
+     </property>
+     <property name="sortingEnabled">
+      <bool>false</bool>
+     </property>
+     <property name="cornerButtonEnabled">
+      <bool>true</bool>
+     </property>
+     <row>
+      <property name="text">
+       <string>Up</string>
+      </property>
+      <property name="icon">
+       <iconset resource="snes9x.qrc">
+        <normaloff>:/icons/icons/up.svg</normaloff>:/icons/icons/up.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Down</string>
+      </property>
+      <property name="icon">
+       <iconset resource="snes9x.qrc">
+        <normaloff>:/icons/icons/down.svg</normaloff>:/icons/icons/down.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Left</string>
+      </property>
+      <property name="icon">
+       <iconset resource="snes9x.qrc">
+        <normaloff>:/icons/icons/left.svg</normaloff>:/icons/icons/left.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Right</string>
+      </property>
+      <property name="icon">
+       <iconset resource="snes9x.qrc">
+        <normaloff>:/icons/icons/right.svg</normaloff>:/icons/icons/right.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>A</string>
+      </property>
+      <property name="icon">
+       <iconset resource="snes9x.qrc">
+        <normaloff>:/icons/icons/a.svg</normaloff>:/icons/icons/a.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>B</string>
+      </property>
+      <property name="icon">
+       <iconset resource="snes9x.qrc">
+        <normaloff>:/icons/icons/b.svg</normaloff>:/icons/icons/b.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>X</string>
+      </property>
+      <property name="icon">
+       <iconset resource="snes9x.qrc">
+        <normaloff>:/icons/icons/x.svg</normaloff>:/icons/icons/x.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Y</string>
+      </property>
+      <property name="icon">
+       <iconset resource="snes9x.qrc">
+        <normaloff>:/icons/icons/y.svg</normaloff>:/icons/icons/y.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>L</string>
+      </property>
+      <property name="icon">
+       <iconset resource="snes9x.qrc">
+        <normaloff>:/icons/icons/l.svg</normaloff>:/icons/icons/l.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>R</string>
+      </property>
+      <property name="icon">
+       <iconset resource="snes9x.qrc">
+        <normaloff>:/icons/icons/r.svg</normaloff>:/icons/icons/r.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Start</string>
+      </property>
+      <property name="icon">
+       <iconset resource="snes9x.qrc">
+        <normaloff>:/icons/icons/start.svg</normaloff>:/icons/icons/start.svg</iconset>
+      </property>
+     </row>
+     <row>
+      <property name="text">
+       <string>Select</string>
+      </property>
+      <property name="icon">
+       <iconset resource="snes9x.qrc">
+        <normaloff>:/icons/icons/select.svg</normaloff>:/icons/icons/select.svg</iconset>
+      </property>
+     </row>
+     <column>
+      <property name="text">
+       <string>Binding #1</string>
+      </property>
+     </column>
+     <column>
+      <property name="text">
+       <string>Binding #2</string>
+      </property>
+     </column>
+     <column>
+      <property name="text">
+       <string>Binding #3</string>
+      </property>
+     </column>
+     <column>
+      <property name="text">
+       <string>Binding #4</string>
+      </property>
+     </column>
+     <item row="0" column="0">
+      <property name="text">
+       <string>Up</string>
+      </property>
+      <property name="icon">
+       <iconset theme="input-gaming"/>
+      </property>
+     </item>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources>
+  <include location="snes9x.qrc"/>
+ </resources>
+ <connections/>
+</ui>

shaders/glsl.h

@@ -13,6 +13,7 @@
 #include <deque>
 #include <limits.h>
 #include <vector>
+#include <unistd.h>
 
 static const unsigned int glsl_max_passes = 20;
 

shaders/shader_platform.h

@@ -9,25 +9,27 @@
 
 #include "port.h"
 
-#ifdef SNES9X_GTK
+#if defined(SNES9X_QT)
-#include <glad/gl.h>
+    #include <glad/gl.h>
-#include <glad/glx.h>
+    #if defined(_WIN32)
-#endif
+        #define realpath(src, resolved) _fullpath(resolved, src, PATH_MAX)
+    #endif
 
-#ifdef _WIN32
+#elif defined(SNES9X_GTK)
-#include <windows.h>
+    #include <glad/gl.h>
-#include <stdlib.h>
+#elif defined(_WIN32)
-#include "gl_core_3_1.h"
+    #include <windows.h>
-#include <direct.h>
+    #include <stdlib.h>
-
+    #include "gl_core_3_1.h"
-#ifdef UNICODE
+    #include <direct.h>
-#define chdir(dir) _wchdir(Utf8ToWide(dir))
-#define realpath(src, resolved) _twfullpath(resolved, src, PATH_MAX)
-#else
-#define chdir(dir) _chdir(dir)
-#define realpath(src, resolved) _fullpath(resolved, src, PATH_MAX)
-#endif
 
+    #ifdef UNICODE
+        #define chdir(dir) _wchdir(Utf8ToWide(dir))
+        #define realpath(src, resolved) _twfullpath(resolved, src, PATH_MAX)
+    #else
+        #define chdir(dir) _chdir(dir)
+        #define realpath(src, resolved) _fullpath(resolved, src, PATH_MAX)
+    #endif
 #endif
 
 #endif /* __SHADER_PLATFORM_H */

vulkan/vulkan_context.cpp

@@ -1,9 +1,10 @@
 #include <exception>
 #include <cstring>
 #include <tuple>
+#include <vector>
+#include <string>
 #include "vulkan_context.hpp"
 #include "slang_shader.hpp"
-#include "vulkan/vulkan.hpp"
 
 namespace Vulkan
 {
@@ -56,7 +57,7 @@ static vk::UniqueInstance create_instance_preamble(const char *wsi_extension)
 {
     load_loader();
     if (!dl || !dl->success())
-        return vk::UniqueInstance();
+        return {};
 
     std::vector<const char *> extensions = { wsi_extension, VK_KHR_SURFACE_EXTENSION_NAME };
     vk::ApplicationInfo application_info({}, {}, {}, {}, VK_API_VERSION_1_0);
@@ -69,6 +70,26 @@ static vk::UniqueInstance create_instance_preamble(const char *wsi_extension)
     return instance;
 }
 
+std::vector<std::string> Vulkan::Context::get_device_list()
+{
+    std::vector<std::string> device_names;
+    auto instance = create_instance_preamble(VK_KHR_SURFACE_EXTENSION_NAME);
+    if (!instance)
+        return {};
+
+    auto device_list = instance->enumeratePhysicalDevices();
+    for (auto &d : device_list)
+    {
+        auto props = d.getProperties();
+        std::string device_name((const char *)props.deviceName);
+
+        device_name += " (" + vk::to_string(props.deviceType) + ")";
+        device_names.push_back(device_name);
+    }
+
+    return device_names;
+}
+
 #ifdef VK_USE_PLATFORM_WIN32_KHR
 bool Context::init_win32(HINSTANCE hinstance, HWND hwnd, int preferred_device)
 {
@@ -127,7 +148,6 @@ bool Context::init_wayland(wl_display *dpy, wl_surface *parent, int initial_widt
 
 bool Context::init(int preferred_device)
 {
-
     init_device(preferred_device);
     init_vma();
     init_command_pool();
@@ -179,12 +199,13 @@ bool Context::init_device(int preferred_device)
         return device_list[0];
     };
 
-    if (preferred_device > 0)
+    if (preferred_device > -1 && preferred_device < device_list.size())
         physical_device = device_list[preferred_device];
     else
         physical_device = find_device();
 
     physical_device.getProperties(&physical_device_props);
+    printf("Vulkan: Using device \"%s\"\n", (const char *)physical_device_props.deviceName);
 
     graphics_queue_family_index = UINT32_MAX;
     auto queue_props = physical_device.getQueueFamilyProperties();

vulkan/vulkan_context.hpp

@@ -9,8 +9,8 @@
 #endif
 #include <cstdio>
 #include <cstdint>
-#include "vk_mem_alloc.hpp"
 #include "vulkan/vulkan.hpp"
+#include "../external/VulkanMemoryAllocator-Hpp/include/vk_mem_alloc.hpp"
 #include "vulkan_swapchain.hpp"
 #include <memory>
 #include <optional>
@@ -24,21 +24,22 @@ class Context
     Context();
     ~Context();
 #ifdef VK_USE_PLATFORM_XLIB_KHR
-    bool init_Xlib(Display *dpy, Window xid, int preferred_device = 0);
+    bool init_Xlib(Display *dpy, Window xid, int preferred_device = -1);
 #endif
 #ifdef VK_USE_PLATFORM_WAYLAND_KHR
-    bool init_wayland(wl_display *dpy, wl_surface *parent, int width, int height, int preferred_device = 0);
+    bool init_wayland(wl_display *dpy, wl_surface *parent, int width, int height, int preferred_device = -1);
 #endif
 #ifdef VK_USE_PLATFORM_WIN32_KHR
-    bool init_win32(HINSTANCE hinstance, HWND hwnd, int preferred_device = 0);
+    bool init_win32(HINSTANCE hinstance, HWND hwnd, int preferred_device = -1);
 #endif
-    bool init(int preferred_device = 0);
+    bool init(int preferred_device = -1);
     bool create_swapchain(int width = -1, int height = -1);
     bool recreate_swapchain(int width = -1, int height = -1);
     void wait_idle();
     vk::CommandBuffer begin_cmd_buffer();
     void end_cmd_buffer();
     void hard_barrier(vk::CommandBuffer cmd);
+    static std::vector<std::string> get_device_list();
 
     vma::Allocator allocator;
     vk::Device device;

vulkan/vulkan_texture.cpp

@@ -251,7 +251,8 @@ void Texture::create(int width, int height, vk::Format fmt, vk::SamplerAddressMo
         .setUsage(vk::BufferUsageFlagBits::eTransferSrc);
 
     aci.setRequiredFlags(vk::MemoryPropertyFlagBits::eHostVisible)
-        .setFlags(vma::AllocationCreateFlagBits::eHostAccessSequentialWrite);
+        .setFlags(vma::AllocationCreateFlagBits::eHostAccessSequentialWrite)
+        .setUsage(vma::MemoryUsage::eAutoPreferHost);
 
     std::tie(buffer, buffer_allocation) = allocator.createBuffer(bci, aci);