// Copyright 2012 Dolphin Emulator Project // Licensed under GPLv2+ // Refer to the license.txt file included. #include #include #include #include "Common/GL/GLInterface/WGL.h" #include "Common/Logging/Log.h" #include "Common/MsgHandler.h" // from wglext.h #ifndef WGL_ARB_pbuffer #define WGL_ARB_pbuffer 1 DECLARE_HANDLE(HPBUFFERARB); #define WGL_DRAW_TO_PBUFFER_ARB 0x202D #define WGL_MAX_PBUFFER_PIXELS_ARB 0x202E #define WGL_MAX_PBUFFER_WIDTH_ARB 0x202F #define WGL_MAX_PBUFFER_HEIGHT_ARB 0x2030 #define WGL_PBUFFER_LARGEST_ARB 0x2033 #define WGL_PBUFFER_WIDTH_ARB 0x2034 #define WGL_PBUFFER_HEIGHT_ARB 0x2035 #define WGL_PBUFFER_LOST_ARB 0x2036 typedef HPBUFFERARB(WINAPI* PFNWGLCREATEPBUFFERARBPROC)(HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int* piAttribList); typedef HDC(WINAPI* PFNWGLGETPBUFFERDCARBPROC)(HPBUFFERARB hPbuffer); typedef int(WINAPI* PFNWGLRELEASEPBUFFERDCARBPROC)(HPBUFFERARB hPbuffer, HDC hDC); typedef BOOL(WINAPI* PFNWGLDESTROYPBUFFERARBPROC)(HPBUFFERARB hPbuffer); typedef BOOL(WINAPI* PFNWGLQUERYPBUFFERARBPROC)(HPBUFFERARB hPbuffer, int iAttribute, int* piValue); #endif /* WGL_ARB_pbuffer */ #ifndef WGL_ARB_pixel_format #define WGL_ARB_pixel_format 1 #define WGL_NUMBER_PIXEL_FORMATS_ARB 0x2000 #define WGL_DRAW_TO_WINDOW_ARB 0x2001 #define WGL_DRAW_TO_BITMAP_ARB 0x2002 #define WGL_ACCELERATION_ARB 0x2003 #define WGL_NEED_PALETTE_ARB 0x2004 #define WGL_NEED_SYSTEM_PALETTE_ARB 0x2005 #define WGL_SWAP_LAYER_BUFFERS_ARB 0x2006 #define WGL_SWAP_METHOD_ARB 0x2007 #define WGL_NUMBER_OVERLAYS_ARB 0x2008 #define WGL_NUMBER_UNDERLAYS_ARB 0x2009 #define WGL_TRANSPARENT_ARB 0x200A #define WGL_TRANSPARENT_RED_VALUE_ARB 0x2037 #define WGL_TRANSPARENT_GREEN_VALUE_ARB 0x2038 #define WGL_TRANSPARENT_BLUE_VALUE_ARB 0x2039 #define WGL_TRANSPARENT_ALPHA_VALUE_ARB 0x203A #define WGL_TRANSPARENT_INDEX_VALUE_ARB 0x203B #define WGL_SHARE_DEPTH_ARB 0x200C #define WGL_SHARE_STENCIL_ARB 0x200D #define WGL_SHARE_ACCUM_ARB 0x200E #define WGL_SUPPORT_GDI_ARB 0x200F #define WGL_SUPPORT_OPENGL_ARB 0x2010 #define WGL_DOUBLE_BUFFER_ARB 0x2011 #define WGL_STEREO_ARB 0x2012 #define WGL_PIXEL_TYPE_ARB 0x2013 #define WGL_COLOR_BITS_ARB 0x2014 #define WGL_RED_BITS_ARB 0x2015 #define WGL_RED_SHIFT_ARB 0x2016 #define WGL_GREEN_BITS_ARB 0x2017 #define WGL_GREEN_SHIFT_ARB 0x2018 #define WGL_BLUE_BITS_ARB 0x2019 #define WGL_BLUE_SHIFT_ARB 0x201A #define WGL_ALPHA_BITS_ARB 0x201B #define WGL_ALPHA_SHIFT_ARB 0x201C #define WGL_ACCUM_BITS_ARB 0x201D #define WGL_ACCUM_RED_BITS_ARB 0x201E #define WGL_ACCUM_GREEN_BITS_ARB 0x201F #define WGL_ACCUM_BLUE_BITS_ARB 0x2020 #define WGL_ACCUM_ALPHA_BITS_ARB 0x2021 #define WGL_DEPTH_BITS_ARB 0x2022 #define WGL_STENCIL_BITS_ARB 0x2023 #define WGL_AUX_BUFFERS_ARB 0x2024 #define WGL_NO_ACCELERATION_ARB 0x2025 #define WGL_GENERIC_ACCELERATION_ARB 0x2026 #define WGL_FULL_ACCELERATION_ARB 0x2027 #define WGL_SWAP_EXCHANGE_ARB 0x2028 #define WGL_SWAP_COPY_ARB 0x2029 #define WGL_SWAP_UNDEFINED_ARB 0x202A #define WGL_TYPE_RGBA_ARB 0x202B #define WGL_TYPE_COLORINDEX_ARB 0x202C typedef BOOL(WINAPI* PFNWGLGETPIXELFORMATATTRIBIVARBPROC)(HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int* piAttributes, int* piValues); typedef BOOL(WINAPI* PFNWGLGETPIXELFORMATATTRIBFVARBPROC)(HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int* piAttributes, FLOAT* pfValues); typedef BOOL(WINAPI* PFNWGLCHOOSEPIXELFORMATARBPROC)(HDC hdc, const int* piAttribIList, const FLOAT* pfAttribFList, UINT nMaxFormats, int* piFormats, UINT* nNumFormats); #endif /* WGL_ARB_pixel_format */ #ifndef WGL_ARB_create_context #define WGL_ARB_create_context 1 #define WGL_CONTEXT_DEBUG_BIT_ARB 0x00000001 #define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002 #define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091 #define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092 #define WGL_CONTEXT_LAYER_PLANE_ARB 0x2093 #define WGL_CONTEXT_FLAGS_ARB 0x2094 #define ERROR_INVALID_VERSION_ARB 0x2095 typedef HGLRC(WINAPI* PFNWGLCREATECONTEXTATTRIBSARBPROC)(HDC hDC, HGLRC hShareContext, const int* attribList); #endif /* WGL_ARB_create_context */ #ifndef WGL_ARB_create_context_profile #define WGL_ARB_create_context_profile 1 #define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126 #define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001 #define WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002 #define ERROR_INVALID_PROFILE_ARB 0x2096 #endif /* WGL_ARB_create_context_profile */ #ifndef WGL_EXT_swap_control #define WGL_EXT_swap_control 1 typedef BOOL(WINAPI* PFNWGLSWAPINTERVALEXTPROC)(int interval); typedef int(WINAPI* PFNWGLGETSWAPINTERVALEXTPROC)(void); #endif /* WGL_EXT_swap_control */ // Persistent pointers static PFNWGLSWAPINTERVALEXTPROC wglSwapIntervalEXT = nullptr; static PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB = nullptr; static PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB = nullptr; static PFNWGLCREATEPBUFFERARBPROC wglCreatePbufferARB = nullptr; static PFNWGLGETPBUFFERDCARBPROC wglGetPbufferDCARB = nullptr; static PFNWGLRELEASEPBUFFERDCARBPROC wglReleasePbufferDCARB = nullptr; static PFNWGLDESTROYPBUFFERARBPROC wglDestroyPbufferARB = nullptr; static void LoadWGLExtensions() { wglSwapIntervalEXT = reinterpret_cast(wglGetProcAddress("wglSwapIntervalEXT")); wglCreateContextAttribsARB = reinterpret_cast( wglGetProcAddress("wglCreateContextAttribsARB")); wglChoosePixelFormatARB = reinterpret_cast( wglGetProcAddress("wglChoosePixelFormatARB")); wglCreatePbufferARB = reinterpret_cast(wglGetProcAddress("wglCreatePbufferARB")); wglGetPbufferDCARB = reinterpret_cast(wglGetProcAddress("wglGetPbufferDCARB")); wglReleasePbufferDCARB = reinterpret_cast(wglGetProcAddress("wglReleasePbufferDCARB")); wglDestroyPbufferARB = reinterpret_cast(wglGetProcAddress("wglGetPbufferDCARB")); } static void ClearWGLExtensionPointers() { wglSwapIntervalEXT = nullptr; wglCreateContextAttribsARB = nullptr; wglChoosePixelFormatARB = nullptr; wglCreatePbufferARB = nullptr; wglGetPbufferDCARB = nullptr; wglReleasePbufferDCARB = nullptr; wglDestroyPbufferARB = nullptr; } GLContextWGL::~GLContextWGL() { if (m_rc) { if (wglGetCurrentContext() == m_rc && !wglMakeCurrent(m_dc, nullptr)) NOTICE_LOG(VIDEO, "Could not release drawing context."); if (!wglDeleteContext(m_rc)) ERROR_LOG(VIDEO, "Attempt to release rendering context failed."); m_rc = nullptr; } if (m_dc) { if (m_pbuffer_handle) { wglReleasePbufferDCARB(static_cast(m_pbuffer_handle), m_dc); m_dc = nullptr; wglDestroyPbufferARB(static_cast(m_pbuffer_handle)); m_pbuffer_handle = nullptr; } else { if (!ReleaseDC(m_window_handle, m_dc)) ERROR_LOG(VIDEO, "Attempt to release device context failed."); m_dc = nullptr; } } } bool GLContextWGL::IsHeadless() const { return !m_window_handle; } void GLContextWGL::SwapInterval(int interval) { if (wglSwapIntervalEXT) wglSwapIntervalEXT(interval); else ERROR_LOG(VIDEO, "No support for SwapInterval (framerate clamped to monitor refresh rate)."); } void GLContextWGL::Swap() { SwapBuffers(m_dc); } void* GLContextWGL::GetFuncAddress(const std::string& name) { FARPROC func = wglGetProcAddress(name.c_str()); if (func == nullptr) { // Using GetModuleHandle here is okay, since we import functions from opengl32.dll, it's // guaranteed to be loaded. HMODULE opengl_module = GetModuleHandle(TEXT("opengl32.dll")); func = GetProcAddress(opengl_module, name.c_str()); } return func; } // Create rendering window. // Call browser: Core.cpp:EmuThread() > main.cpp:Video_Initialize() bool GLContextWGL::Initialize(void* display_handle, void* window_handle, bool stereo, bool core) { if (!window_handle) return false; RECT window_rect = {}; m_window_handle = reinterpret_cast(window_handle); if (!GetClientRect(m_window_handle, &window_rect)) return false; // Clear extension function pointers before creating the first context. ClearWGLExtensionPointers(); // Control window size and picture scaling int twidth = window_rect.right - window_rect.left; int theight = window_rect.bottom - window_rect.top; m_backbuffer_width = twidth; m_backbuffer_height = theight; const DWORD stereo_flag = stereo ? PFD_STEREO : 0; // clang-format off static const PIXELFORMATDESCRIPTOR pfd = { sizeof(PIXELFORMATDESCRIPTOR), // Size Of This Pixel Format Descriptor 1, // Version Number PFD_DRAW_TO_WINDOW | // Format Must Support Window PFD_SUPPORT_OPENGL | // Format Must Support OpenGL PFD_DOUBLEBUFFER | // Must Support Double Buffering stereo_flag, // Could Support Quad Buffering PFD_TYPE_RGBA, // Request An RGBA Format 32, // Select Our Color Depth 0, 0, 0, 0, 0, 0, // Color Bits Ignored 0, // 8bit Alpha Buffer 0, // Shift Bit Ignored 0, // No Accumulation Buffer 0, 0, 0, 0, // Accumulation Bits Ignored 0, // 0Bit Z-Buffer (Depth Buffer) 0, // 0bit Stencil Buffer 0, // No Auxiliary Buffer PFD_MAIN_PLANE, // Main Drawing Layer 0, // Reserved 0, 0, 0 // Layer Masks Ignored }; // clang-format on m_dc = GetDC(m_window_handle); if (!m_dc) { PanicAlert("(1) Can't create an OpenGL Device context. Fail."); return false; } int pixel_format = ChoosePixelFormat(m_dc, &pfd); if (!pixel_format) { PanicAlert("(2) Can't find a suitable PixelFormat."); return false; } if (!SetPixelFormat(m_dc, pixel_format, &pfd)) { PanicAlert("(3) Can't set the PixelFormat."); return false; } m_rc = wglCreateContext(m_dc); if (!m_rc) { PanicAlert("(4) Can't create an OpenGL rendering context."); return false; } // WGL only supports desktop GL, for now. m_opengl_mode = Mode::OpenGL; if (core) { // Make the fallback context current, temporarily. // This is because we need an active context to use wglCreateContextAttribsARB. if (!wglMakeCurrent(m_dc, m_rc)) { PanicAlert("(5) Can't make dummy WGL context current."); return false; } // Load WGL extension function pointers. LoadWGLExtensions(); // Attempt creating a core context. HGLRC core_context = CreateCoreContext(m_dc, nullptr); // Switch out the temporary context before continuing, regardless of whether we got a core // context. If we didn't get a core context, the caller expects that the context is not current. if (!wglMakeCurrent(m_dc, nullptr)) { PanicAlert("(6) Failed to switch out temporary context"); return false; } // If we got a core context, destroy and replace the temporary context. if (core_context) { wglDeleteContext(m_rc); m_rc = core_context; } else { WARN_LOG(VIDEO, "Failed to create a core OpenGL context. Using fallback context."); } } return MakeCurrent(); } std::unique_ptr GLContextWGL::CreateSharedContext() { // WGL does not support surfaceless contexts, so we use a 1x1 pbuffer instead. HANDLE pbuffer; HDC dc; if (!CreatePBuffer(m_dc, 1, 1, &pbuffer, &dc)) return nullptr; HGLRC rc = CreateCoreContext(dc, m_rc); if (!rc) { wglReleasePbufferDCARB(static_cast(pbuffer), dc); wglDestroyPbufferARB(static_cast(pbuffer)); return nullptr; } std::unique_ptr context = std::make_unique(); context->m_pbuffer_handle = pbuffer; context->m_dc = dc; context->m_rc = rc; context->m_opengl_mode = m_opengl_mode; context->m_is_shared = true; return context; } HGLRC GLContextWGL::CreateCoreContext(HDC dc, HGLRC share_context) { if (!wglCreateContextAttribsARB) { WARN_LOG(VIDEO, "Missing WGL_ARB_create_context extension"); return nullptr; } for (const auto& version : s_desktop_opengl_versions) { // Construct list of attributes. Prefer a forward-compatible, core context. std::array attribs = {WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB, #ifdef _DEBUG WGL_CONTEXT_FLAGS_ARB, WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB | WGL_CONTEXT_DEBUG_BIT_ARB, #else WGL_CONTEXT_FLAGS_ARB, WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB, #endif WGL_CONTEXT_MAJOR_VERSION_ARB, version.first, WGL_CONTEXT_MINOR_VERSION_ARB, version.second, 0, 0}; // Attempt creating this context. HGLRC core_context = wglCreateContextAttribsARB(dc, nullptr, attribs.data()); if (core_context) { // If we're creating a shared context, share the resources before the context is used. if (share_context) { if (!wglShareLists(share_context, core_context)) { ERROR_LOG(VIDEO, "wglShareLists failed"); wglDeleteContext(core_context); return nullptr; } } INFO_LOG(VIDEO, "WGL: Created a GL %d.%d core context", version.first, version.second); return core_context; } } WARN_LOG(VIDEO, "Unable to create a core OpenGL context of an acceptable version"); return nullptr; } bool GLContextWGL::CreatePBuffer(HDC onscreen_dc, int width, int height, HANDLE* pbuffer_handle, HDC* pbuffer_dc) { if (!wglChoosePixelFormatARB || !wglCreatePbufferARB || !wglGetPbufferDCARB || !wglReleasePbufferDCARB || !wglDestroyPbufferARB) { ERROR_LOG(VIDEO, "Missing WGL_ARB_pbuffer extension"); return false; } static constexpr std::array pf_iattribs = { WGL_DRAW_TO_PBUFFER_ARB, 1, // Pixel format compatible with pbuffer rendering WGL_RED_BITS_ARB, 0, WGL_GREEN_BITS_ARB, 0, WGL_BLUE_BITS_ARB, 0, WGL_DEPTH_BITS_ARB, 0, WGL_STENCIL_BITS_ARB, 0, 0, 0}; static constexpr std::array pf_fattribs = {}; int pixel_format; UINT num_pixel_formats; if (!wglChoosePixelFormatARB(onscreen_dc, pf_iattribs.data(), pf_fattribs.data(), 1, &pixel_format, &num_pixel_formats)) { ERROR_LOG(VIDEO, "Failed to obtain a compatible pbuffer pixel format"); return false; } static constexpr std::array pb_attribs = {}; HPBUFFERARB pbuffer = wglCreatePbufferARB(onscreen_dc, pixel_format, width, height, pb_attribs.data()); if (!pbuffer) { ERROR_LOG(VIDEO, "Failed to create pbuffer"); return false; } HDC dc = wglGetPbufferDCARB(pbuffer); if (!dc) { ERROR_LOG(VIDEO, "Failed to get drawing context from pbuffer"); wglDestroyPbufferARB(pbuffer); return false; } *pbuffer_handle = pbuffer; *pbuffer_dc = dc; return true; } bool GLContextWGL::MakeCurrent() { return wglMakeCurrent(m_dc, m_rc) == TRUE; } bool GLContextWGL::ClearCurrent() { return wglMakeCurrent(m_dc, nullptr) == TRUE; } // Update window width, size and etc. Called from Render.cpp void GLContextWGL::Update() { RECT rcWindow; GetClientRect(m_window_handle, &rcWindow); // Get the new window width and height m_backbuffer_width = rcWindow.right - rcWindow.left; m_backbuffer_height = rcWindow.bottom - rcWindow.top; }