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dolphin/Source/Core/Common/GL/GLInterface/EGL.cpp

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// Copyright 2012 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <array>
#include <cstdlib>
#include <sstream>
#include <vector>
#include "Common/GL/GLInterface/EGL.h"
#include "Common/Logging/Log.h"
#ifndef EGL_KHR_create_context
#define EGL_KHR_create_context 1
#define EGL_CONTEXT_MAJOR_VERSION_KHR 0x3098
#define EGL_CONTEXT_MINOR_VERSION_KHR 0x30FB
#define EGL_CONTEXT_FLAGS_KHR 0x30FC
#define EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR 0x30FD
#define EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR 0x31BD
#define EGL_NO_RESET_NOTIFICATION_KHR 0x31BE
#define EGL_LOSE_CONTEXT_ON_RESET_KHR 0x31BF
#define EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR 0x00000001
#define EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR 0x00000002
#define EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR 0x00000004
#define EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR 0x00000001
#define EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR 0x00000002
#define EGL_OPENGL_ES3_BIT_KHR 0x00000040
#endif /* EGL_KHR_create_context */
GLContextEGL::~GLContextEGL()
{
DestroyWindowSurface();
DestroyContext();
}
bool GLContextEGL::IsHeadless() const
{
return m_host_window == nullptr;
}
void GLContextEGL::Swap()
{
if (m_egl_surface != EGL_NO_SURFACE)
eglSwapBuffers(m_egl_display, m_egl_surface);
}
void GLContextEGL::SwapInterval(int interval)
{
eglSwapInterval(m_egl_display, interval);
}
void* GLContextEGL::GetFuncAddress(const std::string& name)
{
return (void*)eglGetProcAddress(name.c_str());
}
void GLContextEGL::DetectMode(bool has_handle)
{
EGLint num_configs;
bool supportsGL = false, supportsGLES3 = false;
std::array<int, 3> renderable_types{{EGL_OPENGL_BIT, EGL_OPENGL_ES3_BIT_KHR}};
for (auto renderable_type : renderable_types)
{
// attributes for a visual in RGBA format with at least
// 8 bits per color
int attribs[] = {EGL_RED_SIZE,
8,
EGL_GREEN_SIZE,
8,
EGL_BLUE_SIZE,
8,
EGL_RENDERABLE_TYPE,
renderable_type,
EGL_SURFACE_TYPE,
has_handle ? EGL_WINDOW_BIT : 0,
EGL_NONE};
// Get how many configs there are
if (!eglChooseConfig(m_egl_display, attribs, nullptr, 0, &num_configs))
{
INFO_LOG(VIDEO, "Error: couldn't get an EGL visual config");
continue;
}
EGLConfig* config = new EGLConfig[num_configs];
// Get all the configurations
if (!eglChooseConfig(m_egl_display, attribs, config, num_configs, &num_configs))
{
INFO_LOG(VIDEO, "Error: couldn't get an EGL visual config");
delete[] config;
continue;
}
for (int i = 0; i < num_configs; ++i)
{
EGLint attribVal;
bool ret;
ret = eglGetConfigAttrib(m_egl_display, config[i], EGL_RENDERABLE_TYPE, &attribVal);
if (ret)
{
if (attribVal & EGL_OPENGL_BIT)
supportsGL = true;
if (attribVal & EGL_OPENGL_ES3_BIT_KHR)
supportsGLES3 = true;
}
}
delete[] config;
}
if (supportsGL)
{
INFO_LOG(VIDEO, "Using OpenGL");
m_opengl_mode = Mode::OpenGL;
}
else if (supportsGLES3)
{
INFO_LOG(VIDEO, "Using OpenGL|ES");
m_opengl_mode = Mode::OpenGLES;
}
else
{
// Errored before we found a mode
ERROR_LOG(VIDEO, "Error: Failed to detect OpenGL flavour, falling back to OpenGL");
// This will fail to create a context, as it'll try to use the same attribs we just failed to
// find a matching config with
m_opengl_mode = Mode::OpenGL;
}
}
EGLDisplay GLContextEGL::OpenEGLDisplay()
{
return eglGetDisplay(EGL_DEFAULT_DISPLAY);
}
EGLNativeWindowType GLContextEGL::GetEGLNativeWindow(EGLConfig config)
{
return reinterpret_cast<EGLNativeWindowType>(EGL_DEFAULT_DISPLAY);
}
// Create rendering window.
// Call browser: Core.cpp:EmuThread() > main.cpp:Video_Initialize()
bool GLContextEGL::Initialize(void* display_handle, void* window_handle, bool stereo, bool core)
{
const bool has_handle = !!window_handle;
EGLint egl_major, egl_minor;
bool supports_core_profile = false;
m_host_display = display_handle;
m_host_window = window_handle;
m_egl_display = OpenEGLDisplay();
if (!m_egl_display)
{
INFO_LOG(VIDEO, "Error: eglGetDisplay() failed");
return false;
}
if (!eglInitialize(m_egl_display, &egl_major, &egl_minor))
{
INFO_LOG(VIDEO, "Error: eglInitialize() failed");
return false;
}
/* Detection code */
EGLint num_configs;
if (m_opengl_mode == Mode::Detect)
DetectMode(has_handle);
// attributes for a visual in RGBA format with at least
// 8 bits per color
int attribs[] = {EGL_RENDERABLE_TYPE,
0,
EGL_RED_SIZE,
8,
EGL_GREEN_SIZE,
8,
EGL_BLUE_SIZE,
8,
EGL_SURFACE_TYPE,
has_handle ? EGL_WINDOW_BIT : 0,
EGL_NONE};
std::vector<EGLint> ctx_attribs;
switch (m_opengl_mode)
{
case Mode::OpenGL:
attribs[1] = EGL_OPENGL_BIT;
ctx_attribs = {EGL_NONE};
break;
case Mode::OpenGLES:
attribs[1] = EGL_OPENGL_ES3_BIT_KHR;
ctx_attribs = {EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE};
break;
default:
ERROR_LOG(VIDEO, "Unknown opengl mode set");
return false;
}
if (!eglChooseConfig(m_egl_display, attribs, &m_config, 1, &num_configs))
{
INFO_LOG(VIDEO, "Error: couldn't get an EGL visual config");
return false;
}
if (m_opengl_mode == Mode::OpenGL)
eglBindAPI(EGL_OPENGL_API);
else
eglBindAPI(EGL_OPENGL_ES_API);
std::string tmp;
std::istringstream buffer(eglQueryString(m_egl_display, EGL_EXTENSIONS));
while (buffer >> tmp)
{
if (tmp == "EGL_KHR_surfaceless_context")
m_supports_surfaceless = true;
else if (tmp == "EGL_KHR_create_context")
supports_core_profile = true;
}
if (supports_core_profile && core && m_opengl_mode == Mode::OpenGL)
{
for (const auto& version : s_desktop_opengl_versions)
{
std::vector<EGLint> core_attribs = {EGL_CONTEXT_MAJOR_VERSION_KHR,
version.first,
EGL_CONTEXT_MINOR_VERSION_KHR,
version.second,
EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR,
EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR,
EGL_CONTEXT_FLAGS_KHR,
EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR,
EGL_NONE};
m_egl_context = eglCreateContext(m_egl_display, m_config, EGL_NO_CONTEXT, &core_attribs[0]);
if (m_egl_context)
{
m_attribs = std::move(core_attribs);
break;
}
}
}
if (!m_egl_context)
{
m_egl_context = eglCreateContext(m_egl_display, m_config, EGL_NO_CONTEXT, &ctx_attribs[0]);
m_attribs = std::move(ctx_attribs);
}
if (!m_egl_context)
{
INFO_LOG(VIDEO, "Error: eglCreateContext failed");
return false;
}
if (!CreateWindowSurface())
{
ERROR_LOG(VIDEO, "Error: CreateWindowSurface failed 0x%04x", eglGetError());
return false;
}
return MakeCurrent();
}
std::unique_ptr<GLContext> GLContextEGL::CreateSharedContext()
{
eglBindAPI(m_opengl_mode == Mode::OpenGL ? EGL_OPENGL_API : EGL_OPENGL_ES_API);
EGLContext new_egl_context =
eglCreateContext(m_egl_display, m_config, m_egl_context, m_attribs.data());
if (!new_egl_context)
{
INFO_LOG(VIDEO, "Error: eglCreateContext failed 0x%04x", eglGetError());
return nullptr;
}
std::unique_ptr<GLContextEGL> new_context = std::make_unique<GLContextEGL>();
new_context->m_opengl_mode = m_opengl_mode;
new_context->m_egl_context = new_egl_context;
new_context->m_host_display = m_host_display;
new_context->m_egl_display = m_egl_display;
new_context->m_config = m_config;
new_context->m_supports_surfaceless = m_supports_surfaceless;
new_context->m_is_shared = true;
if (!new_context->CreateWindowSurface())
{
ERROR_LOG(VIDEO, "Error: CreateWindowSurface failed 0x%04x", eglGetError());
return nullptr;
}
return new_context;
}
bool GLContextEGL::CreateWindowSurface()
{
if (m_host_window)
{
EGLNativeWindowType native_window = GetEGLNativeWindow(m_config);
m_egl_surface = eglCreateWindowSurface(m_egl_display, m_config, native_window, nullptr);
if (!m_egl_surface)
{
INFO_LOG(VIDEO, "Error: eglCreateWindowSurface failed");
return false;
}
}
else if (!m_supports_surfaceless)
{
EGLint attrib_list[] = {
EGL_NONE,
};
m_egl_surface = eglCreatePbufferSurface(m_egl_display, m_config, attrib_list);
if (!m_egl_surface)
{
INFO_LOG(VIDEO, "Error: eglCreatePbufferSurface failed");
return false;
}
}
else
{
m_egl_surface = EGL_NO_SURFACE;
}
return true;
}
void GLContextEGL::DestroyWindowSurface()
{
if (m_egl_surface == EGL_NO_SURFACE)
return;
if (eglGetCurrentSurface(EGL_DRAW) == m_egl_surface)
eglMakeCurrent(m_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
if (!eglDestroySurface(m_egl_display, m_egl_surface))
NOTICE_LOG(VIDEO, "Could not destroy window surface.");
m_egl_surface = EGL_NO_SURFACE;
}
bool GLContextEGL::MakeCurrent()
{
return eglMakeCurrent(m_egl_display, m_egl_surface, m_egl_surface, m_egl_context);
}
void GLContextEGL::UpdateSurface(void* window_handle)
{
m_host_window = window_handle;
ClearCurrent();
DestroyWindowSurface();
CreateWindowSurface();
MakeCurrent();
}
bool GLContextEGL::ClearCurrent()
{
return eglMakeCurrent(m_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
}
// Close backend
void GLContextEGL::DestroyContext()
{
if (!m_egl_context)
return;
if (eglGetCurrentContext() == m_egl_context)
eglMakeCurrent(m_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
if (!eglDestroyContext(m_egl_display, m_egl_context))
NOTICE_LOG(VIDEO, "Could not destroy drawing context.");
if (!m_is_shared && !eglTerminate(m_egl_display))
NOTICE_LOG(VIDEO, "Could not destroy display connection.");
m_egl_context = EGL_NO_CONTEXT;
m_egl_display = EGL_NO_DISPLAY;
}
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