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Common: Add GL context wrapper implementation

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This commit is contained in:
Connor McLaughlin 2020-05-07 22:48:13 +10:00
parent 75ad533f30
commit 4f4c4f4146
22 changed files with 2012 additions and 7 deletions
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25
CMakeLists.txt
View file

@ -4,6 +4,14 @@ project(duckstation C CXX)
# Pull in modules.
set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/CMakeModules/")
# Platform detection.
if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
set(LINUX TRUE)
set(SUPPORTS_X11 TRUE)
endif()
# Global options.
if(NOT ANDROID)
option(BUILD_SDL_FRONTEND "Build the SDL frontend" ON)
option(BUILD_QT_FRONTEND "Build the Qt frontend" ON)
@ -12,6 +20,15 @@ if(NOT ANDROID)
endif()
# OpenGL context creation methods.
if(SUPPORTS_X11)
option(USE_X11 "Support X11 window system" ON)
endif()
if(LINUX OR ANDROID)
option(USE_EGL "Support EGL OpenGL context creation" ON)
endif()
# Common include/library directories on Windows.
if(WIN32)
set(SDL2_FOUND TRUE)
@ -40,12 +57,12 @@ if(NOT ANDROID)
endif()
endif()
if(ANDROID)
if(USE_EGL)
find_package(EGL REQUIRED)
else()
find_package(OpenGL COMPONENTS EGL GLX OpenGL)
endif()
if(USE_X11)
find_package(X11 REQUIRED)
endif()
# Set _DEBUG macro for Debug builds.
set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -D_DEBUG")

11
dep/glad/CMakeLists.txt
View file

@ -2,7 +2,13 @@ set(SRCS
src/glad.c
)
add_library(glad ${SRCS})
# Linking as a static library breaks on macOS, see https://github.com/libigl/libigl/issues/751
if(APPLE)
add_library(glad OBJECT ${SRCS})
else()
add_library(glad ${SRCS})
endif()
target_include_directories(glad PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/include")
target_include_directories(glad INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/include")
target_link_libraries(glad PRIVATE Threads::Threads "${CMAKE_DL_LIBS}")
@ -14,8 +20,7 @@ else()
target_sources(glad PRIVATE src/glad_egl.c)
target_link_libraries(glad PRIVATE EGL::EGL)
endif()
if(USE_GLX)
if(SUPPORTS_X11)
target_sources(glad PRIVATE src/glad_glx.c)
target_link_options(glad PRIVATE OpenGL::GLX)
endif()
endif()

50
src/common/CMakeLists.txt
View file

@ -25,6 +25,8 @@ add_library(common
fifo_queue.h
file_system.cpp
file_system.h
gl/context.cpp
gl/context.h
gl/program.cpp
gl/program.h
gl/shader_cache.cpp
@ -69,6 +71,8 @@ target_link_libraries(common PRIVATE glad libcue Threads::Threads cubeb libchdr)
if(WIN32)
target_sources(common PRIVATE
gl/context_wgl.cpp
gl/context_wgl.h
d3d11/shader_cache.cpp
d3d11/shader_cache.h
d3d11/shader_compiler.cpp
@ -87,3 +91,49 @@ endif()
if(ANDROID)
target_link_libraries(common PRIVATE log)
endif()
if(USE_X11)
target_sources(common PRIVATE
gl/x11_window.cpp
gl/x11_window.h
)
target_compile_definitions(common PRIVATE "-DUSE_X11=1")
target_include_directories(common PRIVATE "${X11_INCLUDE_DIR}")
target_link_libraries(common PRIVATE "${X11_LIBRARIES}")
endif()
if(USE_EGL)
target_sources(common PRIVATE
gl/context_egl.cpp
gl/context_egl.h
)
target_compile_definitions(common PRIVATE "-DUSE_EGL=1")
if(SUPPORTS_X11)
target_sources(common PRIVATE
gl/context_egl_x11.cpp
gl/context_egl_x11.h
)
endif()
if(ANDROID)
target_sources(common PRIVATE
gl/context_egl_android.cpp
gl/context_egl_android.h
)
endif()
endif()
if(SUPPORTS_X11)
target_sources(common PRIVATE
gl/context_glx.cpp
gl/context_glx.h
)
target_compile_definitions(common PRIVATE "-DUSE_GLX=1")
endif()
if(APPLE)
target_sources(common PRIVATE
gl/context_agl.mm
gl/context_agl.h
)
endif()

5
src/common/common.vcxproj
View file

@ -52,6 +52,8 @@
<ClInclude Include="event.h" />
<ClInclude Include="fifo_queue.h" />
<ClInclude Include="file_system.h" />
<ClInclude Include="gl\context.h" />
<ClInclude Include="gl\context_wgl.h" />
<ClInclude Include="gl\program.h" />
<ClInclude Include="gl\shader_cache.h" />
<ClInclude Include="gl\stream_buffer.h" />
@ -74,6 +76,7 @@
<ClInclude Include="types.h" />
<ClInclude Include="cd_xa.h" />
<ClInclude Include="wav_writer.h" />
<ClInclude Include="window_info.h" />
</ItemGroup>
<ItemGroup>
<ClCompile Include="assert.cpp" />
@ -91,6 +94,8 @@
<ClCompile Include="d3d11\texture.cpp" />
<ClCompile Include="event.cpp" />
<ClCompile Include="file_system.cpp" />
<ClCompile Include="gl\context.cpp" />
<ClCompile Include="gl\context_wgl.cpp" />
<ClCompile Include="gl\program.cpp" />
<ClCompile Include="gl\shader_cache.cpp" />
<ClCompile Include="gl\stream_buffer.cpp" />

13
src/common/common.vcxproj.filters
View file

@ -58,6 +58,13 @@
</ClInclude>
<ClInclude Include="event.h" />
<ClInclude Include="bitutils.h" />
<ClInclude Include="gl\context.h">
<Filter>gl</Filter>
</ClInclude>
<ClInclude Include="gl\context_wgl.h">
<Filter>gl</Filter>
</ClInclude>
<ClInclude Include="window_info.h" />
</ItemGroup>
<ItemGroup>
<ClCompile Include="jit_code_buffer.cpp" />
@ -111,6 +118,12 @@
<Filter>gl</Filter>
</ClCompile>
<ClCompile Include="event.cpp" />
<ClCompile Include="gl\context_wgl.cpp">
<Filter>gl</Filter>
</ClCompile>
<ClCompile Include="gl\context.cpp">
<Filter>gl</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<Natvis Include="bitfield.natvis" />

190
src/common/gl/context.cpp Normal file
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@ -0,0 +1,190 @@
#include "context.h"
#include "../log.h"
#include "glad.h"
#include <cstdlib>
#ifdef __APPLE__
#include <stdlib.h>
#else
#include <malloc.h>
#endif
Log_SetChannel(GL::Context);
#if defined(WIN32)
#include "context_wgl.h"
#elif defined(__APPLE__)
#include "context_agl.h"
#endif
#ifdef USE_EGL
#if defined(USE_X11)
#include "context_egl_x11.h"
#elif defined(ANDROID)
#include "context_egl_android.h"
#else
#error Unknown EGL platform
#endif
#endif
#ifdef USE_GLX
#include "context_glx.h"
#endif
namespace GL {
static bool ShouldPreferESContext()
{
#ifndef _MSC_VER
const char* value = std::getenv("PREFER_GLES_CONTEXT");
return (value && std::strcmp(value, "1") == 0);
#else
char buffer[2] = {};
size_t buffer_size = sizeof(buffer);
getenv_s(&buffer_size, buffer, "PREFER_GLES_CONTEXT");
return (std::strcmp(buffer, "1") == 0);
#endif
}
Context::Context(const WindowInfo& wi) : m_wi(wi) {}
Context::~Context() = default;
std::unique_ptr<GL::Context> Context::Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try)
{
if (ShouldPreferESContext())
{
// move ES versions to the front
Version* new_versions_to_try = static_cast<Version*>(alloca(sizeof(Version) * num_versions_to_try));
size_t count = 0;
for (size_t i = 0; i < num_versions_to_try; i++)
{
if (versions_to_try[i].profile == Profile::ES)
new_versions_to_try[count++] = versions_to_try[i];
}
for (size_t i = 0; i < num_versions_to_try; i++)
{
if (versions_to_try[i].profile != Profile::ES)
new_versions_to_try[count++] = versions_to_try[i];
}
versions_to_try = new_versions_to_try;
}
std::unique_ptr<Context> context;
#if defined(WIN32)
context = ContextWGL::Create(wi, versions_to_try, num_versions_to_try);
#elif defined(__APPLE__)
context = ContextAGL::Create(wi, versions_to_try, num_versions_to_try);
#else
if (wi.type == WindowInfo::Type::X11)
{
#ifdef USE_EGL
const char* use_egl_x11 = std::getenv("USE_EGL_X11");
if (use_egl_x11 && std::strcmp(use_egl_x11, "1") == 0)
context = ContextEGLX11::Create(wi, versions_to_try, num_versions_to_try);
else
context = ContextGLX::Create(wi, versions_to_try, num_versions_to_try);
#else
context = ContextGLX::Create(wi, versions_to_try, num_versions_to_try);
#endif
}
#endif
if (!context)
return nullptr;
Log_InfoPrintf("Created a %s context", context->IsGLES() ? "OpenGL ES" : "OpenGL");
// TODO: Not thread-safe.
static Context* context_being_created;
context_being_created = context.get();
// load up glad
if (!context->IsGLES())
{
if (!gladLoadGLLoader([](const char* name) { return context_being_created->GetProcAddress(name); }))
{
Log_ErrorPrintf("Failed to load GL functions for GLAD");
return nullptr;
}
}
else
{
if (!gladLoadGLES2Loader([](const char* name) { return context_being_created->GetProcAddress(name); }))
{
Log_ErrorPrintf("Failed to load GLES functions for GLAD");
return nullptr;
}
}
const char* gl_vendor = reinterpret_cast<const char*>(glGetString(GL_VENDOR));
const char* gl_renderer = reinterpret_cast<const char*>(glGetString(GL_RENDERER));
const char* gl_version = reinterpret_cast<const char*>(glGetString(GL_VERSION));
Log_InfoPrintf("GL_VENDOR: %s", gl_vendor);
Log_InfoPrintf("GL_RENDERER: %s", gl_renderer);
Log_InfoPrintf("GL_VERSION: %s", gl_version);
return context;
}
const std::array<Context::Version, 11>& Context::GetAllDesktopVersionsList()
{
static constexpr std::array<Version, 11> vlist = {{{Profile::Core, 4, 6},
{Profile::Core, 4, 5},
{Profile::Core, 4, 4},
{Profile::Core, 4, 3},
{Profile::Core, 4, 2},
{Profile::Core, 4, 1},
{Profile::Core, 4, 0},
{Profile::Core, 3, 3},
{Profile::Core, 3, 2},
{Profile::Core, 3, 1},
{Profile::Core, 3, 0}}};
return vlist;
}
const std::array<Context::Version, 12>& Context::GetAllDesktopVersionsListWithFallback()
{
static constexpr std::array<Version, 12> vlist = {{{Profile::Core, 4, 6},
{Profile::Core, 4, 5},
{Profile::Core, 4, 4},
{Profile::Core, 4, 3},
{Profile::Core, 4, 2},
{Profile::Core, 4, 1},
{Profile::Core, 4, 0},
{Profile::Core, 3, 3},
{Profile::Core, 3, 2},
{Profile::Core, 3, 1},
{Profile::Core, 3, 0},
{Profile::NoProfile, 0, 0}}};
return vlist;
}
const std::array<Context::Version, 4>& Context::GetAllESVersionsList()
{
static constexpr std::array<Version, 4> vlist = {
{{Profile::ES, 3, 2}, {Profile::ES, 3, 1}, {Profile::ES, 3, 0}, {Profile::ES, 2, 0}}};
return vlist;
}
const std::array<Context::Version, 16>& Context::GetAllVersionsList()
{
static constexpr std::array<Version, 16> vlist = {{{Profile::Core, 4, 6},
{Profile::Core, 4, 5},
{Profile::Core, 4, 4},
{Profile::Core, 4, 3},
{Profile::Core, 4, 2},
{Profile::Core, 4, 1},
{Profile::Core, 4, 0},
{Profile::Core, 3, 3},
{Profile::Core, 3, 2},
{Profile::Core, 3, 1},
{Profile::Core, 3, 0},
{Profile::ES, 3, 2},
{Profile::ES, 3, 1},
{Profile::ES, 3, 0},
{Profile::ES, 2, 0},
{Profile::NoProfile, 0, 0}}};
return vlist;
}
} // namespace GL

66
src/common/gl/context.h Normal file
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@ -0,0 +1,66 @@
#pragma once
#include "../types.h"
#include "../window_info.h"
#include <array>
#include <memory>
namespace GL {
class Context
{
public:
Context(const WindowInfo& wi);
virtual ~Context();
enum class Profile
{
NoProfile,
Core,
ES
};
struct Version
{
Profile profile;
int major_version;
int minor_version;
};
ALWAYS_INLINE const WindowInfo& GetWindowInfo() const { return m_wi; }
ALWAYS_INLINE bool IsGLES() const { return (m_version.profile == Profile::ES); }
ALWAYS_INLINE u32 GetSurfaceWidth() const { return m_wi.surface_width; }
ALWAYS_INLINE u32 GetSurfaceHeight() const { return m_wi.surface_height; }
ALWAYS_INLINE WindowInfo::SurfaceFormat GetSurfaceFormat() const { return m_wi.surface_format; }
virtual void* GetProcAddress(const char* name) = 0;
virtual bool ChangeSurface(const WindowInfo& new_wi) = 0;
virtual void ResizeSurface(u32 new_surface_width = 0, u32 new_surface_height = 0) = 0;
virtual bool SwapBuffers() = 0;
virtual bool MakeCurrent() = 0;
virtual bool DoneCurrent() = 0;
virtual bool SetSwapInterval(s32 interval) = 0;
virtual std::unique_ptr<Context> CreateSharedContext(const WindowInfo& wi) = 0;
static std::unique_ptr<Context> Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try);
template<size_t N>
static std::unique_ptr<Context> Create(const WindowInfo& wi, const std::array<Version, N>& versions_to_try)
{
return Create(wi, versions_to_try.data(), versions_to_try.size());
}
static std::unique_ptr<Context> Create(const WindowInfo& wi) { return Create(wi, GetAllVersionsList()); }
static const std::array<Version, 11>& GetAllDesktopVersionsList();
static const std::array<Version, 12>& GetAllDesktopVersionsListWithFallback();
static const std::array<Version, 4>& GetAllESVersionsList();
static const std::array<Version, 16>& GetAllVersionsList();
protected:
#ifdef WIN32
#endif
WindowInfo m_wi;
Version m_version = {};
};
} // namespace GL

48
src/common/gl/context_agl.h Normal file
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@ -0,0 +1,48 @@
#pragma once
#include "context.h"
#include <glad.h>
#if defined(__APPLE__) && defined(__OBJC__)
#import <AppKit/AppKit.h>
#else
struct NSOpenGLContext;
struct NSOpenGLPixelFormat;
struct NSView;
#endif
namespace GL {
class ContextAGL final : public Context
{
public:
ContextAGL(const WindowInfo& wi);
~ContextAGL() override;
static std::unique_ptr<Context> Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try);
void* GetProcAddress(const char* name) override;
bool ChangeSurface(const WindowInfo& new_wi) override;
void ResizeSurface(u32 new_surface_width = 0, u32 new_surface_height = 0) override;
bool SwapBuffers() override;
bool MakeCurrent() override;
bool DoneCurrent() override;
bool SetSwapInterval(s32 interval) override;
std::unique_ptr<Context> CreateSharedContext(const WindowInfo& wi) override;
private:
ALWAYS_INLINE NSView* GetView() const { return static_cast<NSView*>(m_wi.window_handle); }
bool Initialize(const Version* versions_to_try, size_t num_versions_to_try);
bool CreateContext(NSOpenGLContext* share_context, int profile, bool make_current);
void BindContextToView();
// returns true if dimensions have changed
bool UpdateDimensions();
NSOpenGLContext* m_context = nullptr;
NSOpenGLPixelFormat* m_pixel_format = nullptr;
void* m_opengl_module_handle = nullptr;
};
} // namespace GL

214
src/common/gl/context_agl.mm Normal file
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@ -0,0 +1,214 @@
#include "context_agl.h"
#include "../assert.h"
#include "../log.h"
#include "glad.h"
#include <dlfcn.h>
Log_SetChannel(GL::ContextAGL);
namespace GL {
ContextAGL::ContextAGL(const WindowInfo& wi) : Context(wi)
{
m_opengl_module_handle = dlopen("/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL", RTLD_NOW);
if (!m_opengl_module_handle)
Log_ErrorPrint("Could not open OpenGL.framework, function lookups will probably fail");
}
ContextAGL::~ContextAGL()
{
if ([NSOpenGLContext currentContext] == m_context)
[NSOpenGLContext clearCurrentContext];
if (m_context)
[m_context release];
if (m_pixel_format)
[m_pixel_format release];
if (m_opengl_module_handle)
dlclose(m_opengl_module_handle);
}
std::unique_ptr<Context> ContextAGL::Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try)
{
std::unique_ptr<ContextAGL> context = std::make_unique<ContextAGL>(wi);
if (!context->Initialize(versions_to_try, num_versions_to_try))
return nullptr;
return context;
}
bool ContextAGL::Initialize(const Version* versions_to_try, size_t num_versions_to_try)
{
for (size_t i = 0; i < num_versions_to_try; i++)
{
const Version& cv = versions_to_try[i];
if (cv.profile == Profile::NoProfile && CreateContext(nullptr, NSOpenGLProfileVersionLegacy, true))
{
// we already have the dummy context, so just use that
m_version = cv;
return true;
}
else if (cv.profile == Profile::Core)
{
if (cv.major_version > 4 || cv.minor_version > 1)
continue;
const NSOpenGLPixelFormatAttribute profile = (cv.major_version > 3 || cv.minor_version > 2) ? NSOpenGLProfileVersion4_1Core : NSOpenGLProfileVersion3_2Core;
if (CreateContext(nullptr, static_cast<int>(profile), true))
{
m_version = cv;
return true;
}
}
}
return false;
}
void* ContextAGL::GetProcAddress(const char* name)
{
void* addr = m_opengl_module_handle ? dlsym(m_opengl_module_handle, name) : nullptr;
if (addr)
return addr;
return dlsym(RTLD_NEXT, name);
}
bool ContextAGL::ChangeSurface(const WindowInfo& new_wi)
{
m_wi = new_wi;
BindContextToView();
return true;
}
void ContextAGL::ResizeSurface(u32 new_surface_width /*= 0*/, u32 new_surface_height /*= 0*/)
{
UpdateDimensions();
}
bool ContextAGL::UpdateDimensions()
{
const NSSize window_size = [GetView() frame].size;
const CGFloat window_scale = [[GetView() window] backingScaleFactor];
const u32 new_width = static_cast<u32>(static_cast<CGFloat>(window_size.width) * window_scale);
const u32 new_height = static_cast<u32>(static_cast<CGFloat>(window_size.height) * window_scale);
if (m_wi.surface_width == new_width && m_wi.surface_height == new_height)
return false;
m_wi.surface_width = new_width;
m_wi.surface_height = new_height;
dispatch_block_t block = ^{
[m_context update];
};
if ([NSThread isMainThread])
block();
else
dispatch_sync(dispatch_get_main_queue(), block);
return true;
}
bool ContextAGL::SwapBuffers()
{
[m_context flushBuffer];
return true;
}
bool ContextAGL::MakeCurrent()
{
[m_context makeCurrentContext];
return true;
}
bool ContextAGL::DoneCurrent()
{
[NSOpenGLContext clearCurrentContext];
return true;
}
bool ContextAGL::SetSwapInterval(s32 interval)
{
GLint gl_interval = static_cast<GLint>(interval);
[m_context setValues:&gl_interval forParameter:NSOpenGLCPSwapInterval];
return true;
}
std::unique_ptr<Context> ContextAGL::CreateSharedContext(const WindowInfo& wi)
{
std::unique_ptr<ContextAGL> context = std::make_unique<ContextAGL>(wi);
context->m_context = [[NSOpenGLContext alloc] initWithFormat:m_pixel_format shareContext:m_context];
if (context->m_context == nil)
return nullptr;
context->m_version = m_version;
context->m_pixel_format = m_pixel_format;
[context->m_pixel_format retain];
if (wi.type == WindowInfo::Type::MacOS)
context->BindContextToView();
return context;
}
bool ContextAGL::CreateContext(NSOpenGLContext* share_context, int profile, bool make_current)
{
if (m_context)
{
[m_context release];
m_context = nullptr;
}
if (m_pixel_format)
[m_pixel_format release];
const std::array<NSOpenGLPixelFormatAttribute, 5> attribs = {{
NSOpenGLPFADoubleBuffer,
NSOpenGLPFAOpenGLProfile,
static_cast<NSOpenGLPixelFormatAttribute>(profile),
NSOpenGLPFAAccelerated,
0}};
m_pixel_format = [[NSOpenGLPixelFormat alloc] initWithAttributes:attribs.data()];
if (m_pixel_format == nil)
{
Log_ErrorPrintf("Failed to initialize pixel format");
return false;
}
m_context = [[NSOpenGLContext alloc] initWithFormat:m_pixel_format shareContext:nil];
if (m_context == nil)
return false;
if (m_wi.type == WindowInfo::Type::MacOS)
BindContextToView();
if (make_current)
[m_context makeCurrentContext];
return true;
}
void ContextAGL::BindContextToView()
{
NSView* const view = GetView();
NSWindow* const window = [view window];
[view setWantsBestResolutionOpenGLSurface:YES];
UpdateDimensions();
dispatch_block_t block = ^{
[window makeFirstResponder:view];
[m_context setView:view];
[window makeKeyAndOrderFront:nil];
};
if ([NSThread isMainThread])
block();
else
dispatch_sync(dispatch_get_main_queue(), block);
}
} // namespace GL

285
src/common/gl/context_egl.cpp Normal file
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@ -0,0 +1,285 @@
#include "context_egl.h"
#include "../assert.h"
#include "../log.h"
Log_SetChannel(GL::ContextEGL);
namespace GL {
ContextEGL::ContextEGL(const WindowInfo& wi) : Context(wi) {}
ContextEGL::~ContextEGL()
{
if (eglGetCurrentContext() == m_context)
eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
if (m_context)
eglDestroyContext(m_display, m_context);
}
std::unique_ptr<Context> ContextEGL::Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try)
{
std::unique_ptr<ContextEGL> context = std::make_unique<ContextEGL>(wi);
if (!context->Initialize(versions_to_try, num_versions_to_try))
return nullptr;
return context;
}
bool ContextEGL::Initialize(const Version* versions_to_try, size_t num_versions_to_try)
{
if (!gladLoadEGL())
{
Log_ErrorPrintf("Loading GLAD EGL functions failed");
return false;
}
m_display = eglGetDisplay(static_cast<EGLNativeDisplayType>(m_wi.display_connection));
if (!m_display)
{
Log_ErrorPrintf("eglGetDisplay() failed: %d", eglGetError());
return false;
}
int egl_major, egl_minor;
if (!eglInitialize(m_display, &egl_major, &egl_minor))
{
Log_ErrorPrintf("eglInitialize() failed: %d", eglGetError());
return false;
}
Log_InfoPrintf("EGL Version: %d.%d", egl_major, egl_minor);
for (size_t i = 0; i < num_versions_to_try; i++)
{
if (CreateContextAndSurface(versions_to_try[i], nullptr, true))
return true;
}
return false;
}
void* ContextEGL::GetProcAddress(const char* name)
{
return reinterpret_cast<void*>(eglGetProcAddress(name));
}
bool ContextEGL::ChangeSurface(const WindowInfo& new_wi)
{
const bool was_current = (eglGetCurrentContext() == m_context);
if (was_current)
eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
if (m_surface != EGL_NO_SURFACE)
{
eglDestroySurface(m_display, m_surface);
m_surface = EGL_NO_SURFACE;
}
m_wi = new_wi;
if (m_wi.type != WindowInfo::Type::Surfaceless && !CreateSurface())
return false;
if (was_current && !eglMakeCurrent(m_display, m_surface, m_surface, m_context))
{
Log_ErrorPrintf("Failed to make context current again after surface change");
return false;
}
return true;
}
void ContextEGL::ResizeSurface(u32 new_surface_width /*= 0*/, u32 new_surface_height /*= 0*/)
{
EGLint surface_width, surface_height;
if (eglQuerySurface(m_display, m_surface, EGL_WIDTH, &surface_width) &&
eglQuerySurface(m_display, m_surface, EGL_HEIGHT, &surface_height))
{
m_wi.surface_width = static_cast<u32>(surface_width);
m_wi.surface_height = static_cast<u32>(surface_height);
}
else
{
Log_ErrorPrintf("eglQuerySurface() failed: %d", eglGetError());
m_wi.surface_width = new_surface_width;
m_wi.surface_height = new_surface_height;
}
}
bool ContextEGL::SwapBuffers()
{
return eglSwapBuffers(m_display, m_surface);
}
bool ContextEGL::MakeCurrent()
{
if (!eglMakeCurrent(m_display, m_surface, m_surface, m_context))
{
Log_ErrorPrintf("eglMakeCurrent() failed: %d", eglGetError());
return false;
}
return true;
}
bool ContextEGL::DoneCurrent()
{
return eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
}
bool ContextEGL::SetSwapInterval(s32 interval)
{
return eglSwapInterval(m_display, interval);
}
std::unique_ptr<Context> ContextEGL::CreateSharedContext(const WindowInfo& wi)
{
std::unique_ptr<ContextEGL> context = std::make_unique<ContextEGL>(wi);
context->m_display = m_display;
if (!context->CreateContextAndSurface(m_version, m_context, false))
return nullptr;
return context;
}
EGLNativeWindowType ContextEGL::GetNativeWindow(EGLConfig config)
{
return {};
}
bool ContextEGL::CreateSurface()
{
EGLNativeWindowType native_window = GetNativeWindow(m_config);
m_surface = eglCreateWindowSurface(m_display, m_config, native_window, nullptr);
if (!m_surface)
{
Log_ErrorPrintf("eglCreateWindowSurface() failed: %d", eglGetError());
return false;
}
// Some implementations may require the size to be queried at runtime.
EGLint surface_width, surface_height;
if (eglQuerySurface(m_display, m_surface, EGL_WIDTH, &surface_width) &&
eglQuerySurface(m_display, m_surface, EGL_HEIGHT, &surface_height))
{
m_wi.surface_width = static_cast<u32>(surface_width);
m_wi.surface_height = static_cast<u32>(surface_height);
}
else
{
Log_ErrorPrintf("eglQuerySurface() failed: %d", eglGetError());
}
return true;
}
bool ContextEGL::CreateContext(const Version& version, EGLContext share_context)
{
int surface_attribs[16] = {
EGL_RENDERABLE_TYPE,
(version.profile == Profile::ES) ?
((version.major_version >= 3) ? EGL_OPENGL_ES3_BIT :
((version.major_version == 2) ? EGL_OPENGL_ES2_BIT : EGL_OPENGL_ES_BIT)) :
EGL_OPENGL_BIT,
EGL_SURFACE_TYPE,
(m_wi.type != WindowInfo::Type::Surfaceless) ? EGL_WINDOW_BIT : 0,
};
int nsurface_attribs = 4;
switch (m_wi.surface_format)
{
case WindowInfo::SurfaceFormat::RGB8:
surface_attribs[nsurface_attribs++] = EGL_RED_SIZE;
surface_attribs[nsurface_attribs++] = 8;
surface_attribs[nsurface_attribs++] = EGL_GREEN_SIZE;
surface_attribs[nsurface_attribs++] = 8;
surface_attribs[nsurface_attribs++] = EGL_BLUE_SIZE;
surface_attribs[nsurface_attribs++] = 8;
break;
case WindowInfo::SurfaceFormat::RGBA8:
surface_attribs[nsurface_attribs++] = EGL_RED_SIZE;
surface_attribs[nsurface_attribs++] = 8;
surface_attribs[nsurface_attribs++] = EGL_GREEN_SIZE;
surface_attribs[nsurface_attribs++] = 8;
surface_attribs[nsurface_attribs++] = EGL_BLUE_SIZE;
surface_attribs[nsurface_attribs++] = 8;
surface_attribs[nsurface_attribs++] = EGL_ALPHA_SIZE;
surface_attribs[nsurface_attribs++] = 8;
break;
case WindowInfo::SurfaceFormat::RGB565:
surface_attribs[nsurface_attribs++] = EGL_RED_SIZE;
surface_attribs[nsurface_attribs++] = 5;
surface_attribs[nsurface_attribs++] = EGL_GREEN_SIZE;
surface_attribs[nsurface_attribs++] = 6;
surface_attribs[nsurface_attribs++] = EGL_BLUE_SIZE;
surface_attribs[nsurface_attribs++] = 5;
break;
default:
UnreachableCode();
break;
}
surface_attribs[nsurface_attribs++] = EGL_NONE;
surface_attribs[nsurface_attribs++] = 0;
EGLint num_configs;
EGLConfig config;
if (!eglChooseConfig(m_display, surface_attribs, &config, 1, &num_configs) || num_configs == 0)
{
Log_ErrorPrintf("eglChooseConfig() failed: %d", eglGetError());
return false;
}
int attribs[8];
int nattribs = 0;
if (version.profile != Profile::NoProfile)
{
attribs[nattribs++] = EGL_CONTEXT_MAJOR_VERSION;
attribs[nattribs++] = version.major_version;
attribs[nattribs++] = EGL_CONTEXT_MINOR_VERSION;
attribs[nattribs++] = version.minor_version;
}
attribs[nattribs++] = EGL_NONE;
attribs[nattribs++] = 0;
eglBindAPI((version.profile == Profile::ES) ? EGL_OPENGL_ES_API : EGL_OPENGL_API);
m_context = eglCreateContext(m_display, config, share_context, attribs);
if (!m_context)
return false;
m_config = config;
m_version = version;
return true;
}
bool ContextEGL::CreateContextAndSurface(const Version& version, EGLContext share_context, bool make_current)
{
if (!CreateContext(version, share_context))
return false;
if (m_wi.type != WindowInfo::Type::Surfaceless && !CreateSurface())
{
Log_ErrorPrintf("Failed to create surface for context");
eglDestroyContext(m_display, m_context);
m_context = EGL_NO_CONTEXT;
return false;
}
if (make_current && !eglMakeCurrent(m_display, m_surface, m_surface, m_context))
{
Log_ErrorPrintf("eglMakeCurrent() failed: %d", eglGetError());
if (m_surface != EGL_NO_SURFACE)
{
eglDestroySurface(m_display, m_surface);
m_surface = EGL_NO_SURFACE;
}
eglDestroyContext(m_display, m_context);
m_context = EGL_NO_CONTEXT;
return false;
}
return true;
}
} // namespace GL

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#pragma once
#include "context.h"
#include "glad_egl.h"
#include "x11_window.h"
namespace GL {
class ContextEGL : public Context
{
public:
ContextEGL(const WindowInfo& wi);
~ContextEGL() override;
static std::unique_ptr<Context> Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try);
void* GetProcAddress(const char* name) override;
virtual bool ChangeSurface(const WindowInfo& new_wi) override;
virtual void ResizeSurface(u32 new_surface_width = 0, u32 new_surface_height = 0) override;
bool SwapBuffers() override;
bool MakeCurrent() override;
bool DoneCurrent() override;
bool SetSwapInterval(s32 interval) override;
virtual std::unique_ptr<Context> CreateSharedContext(const WindowInfo& wi) override;
protected:
virtual EGLNativeWindowType GetNativeWindow(EGLConfig config);
bool Initialize(const Version* versions_to_try, size_t num_versions_to_try);
bool CreateDisplay();
bool CreateContext(const Version& version, EGLContext share_context);
bool CreateContextAndSurface(const Version& version, EGLContext share_context, bool make_current);
bool CreateSurface();
EGLDisplay m_display = EGL_NO_DISPLAY;
EGLSurface m_surface = EGL_NO_SURFACE;
EGLContext m_context = EGL_NO_CONTEXT;
EGLConfig m_config = {};
};
} // namespace GL

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#include "context_egl_android.h"
#include "../log.h"
Log_SetChannel(GL::ContextEGLAndroid);
namespace GL {
ContextEGLX11::ContextEGLAndroid(const WindowInfo& wi) : ContextEGL(wi) {}
ContextEGLX11::~ContextEGLAndroid() = default;
std::unique_ptr<Context> ContextEGLAndroid::Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try)
{
std::unique_ptr<ContextEGLAndroid> context = std::make_unique<ContextEGLAndroid>(wi);
if (!context->Initialize(versions_to_try, num_versions_to_try))
return nullptr;
return context;
}
std::unique_ptr<Context> ContextEGLAndroid::CreateSharedContext(const WindowInfo& wi)
{
std::unique_ptr<ContextEGLAndroid> context = std::make_unique<ContextEGLAndroid>(wi);
context->m_display = m_display;
if (!context->CreateContextAndSurface(m_version, m_context, false))
return nullptr;
return context;
}
EGLNativeWindowType ContextEGLAndroid::GetNativeWindow(EGLConfig config)
{
X11InhibitErrors ei;
EGLint native_visual_id = 0;
if (!eglGetConfigAttrib(m_display, m_config, EGL_NATIVE_VISUAL_ID, &native_visual_id))
{
Log_ErrorPrintf("Failed to get X11 visual ID");
return false;
}
ANativeWindow_setBuffersGeometry(static_cast<ANativeWindow*>(m_wi.window_handle), 0, 0, static_cast<int32_t>(native_visual_id));
return static_cast<EGLNativeWindowType>(m_wi.window_handle);
}
} // namespace GL

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#pragma once
#include "context_egl.h"
#include "x11_window.h"
namespace GL {
class ContextEGLAndroid final : public ContextEGL
{
public:
ContextEGLAndroid(const WindowInfo& wi);
~ContextEGLAndroid() override;
static std::unique_ptr<Context> Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try);
std::unique_ptr<Context> CreateSharedContext(const WindowInfo& wi) override;
protected:
EGLNativeWindowType GetNativeWindow(EGLConfig config) override;
private:
ALWAYS_INLINE Display* GetDisplay() const { return static_cast<Display*>(m_wi.display_connection); }
X11Window m_window;
};
} // namespace GL

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#include "context_egl_x11.h"
#include "../log.h"
Log_SetChannel(GL::ContextEGLX11);
namespace GL {
ContextEGLX11::ContextEGLX11(const WindowInfo& wi) : ContextEGL(wi) {}
ContextEGLX11::~ContextEGLX11() = default;
std::unique_ptr<Context> ContextEGLX11::Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try)
{
std::unique_ptr<ContextEGLX11> context = std::make_unique<ContextEGLX11>(wi);
if (!context->Initialize(versions_to_try, num_versions_to_try))
return nullptr;
return context;
}
std::unique_ptr<Context> ContextEGLX11::CreateSharedContext(const WindowInfo& wi)
{
std::unique_ptr<ContextEGLX11> context = std::make_unique<ContextEGLX11>(wi);
context->m_display = m_display;
if (!context->CreateContextAndSurface(m_version, m_context, false))
return nullptr;
return context;
}
void ContextEGLX11::ResizeSurface(u32 new_surface_width, u32 new_surface_height)
{
m_window.Resize();
ContextEGL::ResizeSurface(new_surface_width, new_surface_height);
}
EGLNativeWindowType ContextEGLX11::GetNativeWindow(EGLConfig config)
{
X11InhibitErrors ei;
EGLint native_visual_id = 0;
if (!eglGetConfigAttrib(m_display, m_config, EGL_NATIVE_VISUAL_ID, &native_visual_id))
{
Log_ErrorPrintf("Failed to get X11 visual ID");
return false;
}
XVisualInfo vi_query = {};
vi_query.visualid = native_visual_id;
int num_vis;
XVisualInfo* vi = XGetVisualInfo(static_cast<Display*>(m_wi.display_connection), VisualIDMask, &vi_query, &num_vis);
if (num_vis <= 0 || !vi)
{
Log_ErrorPrintf("Failed to query visual from X11");
return false;
}
m_window.Destroy();
if (!m_window.Create(GetDisplay(), static_cast<Window>(reinterpret_cast<uintptr_t>(m_wi.window_handle)), vi))
{
Log_ErrorPrintf("Faild to create X11 child window");
XFree(vi);
return false;
}
XFree(vi);
return static_cast<EGLNativeWindowType>(m_window.GetWindow());
}
} // namespace GL

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#pragma once
#include "context_egl.h"
#include "x11_window.h"
namespace GL {
class ContextEGLX11 final : public ContextEGL
{
public:
ContextEGLX11(const WindowInfo& wi);
~ContextEGLX11() override;
static std::unique_ptr<Context> Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try);
std::unique_ptr<Context> CreateSharedContext(const WindowInfo& wi) override;
void ResizeSurface(u32 new_surface_width = 0, u32 new_surface_height = 0) override;
protected:
EGLNativeWindowType GetNativeWindow(EGLConfig config) override;
private:
ALWAYS_INLINE Display* GetDisplay() const { return static_cast<Display*>(m_wi.display_connection); }
X11Window m_window;
};
} // namespace GL

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#include "context_glx.h"
#include "../assert.h"
#include "../log.h"
Log_SetChannel(GL::ContextGLX);
namespace GL {
ContextGLX::ContextGLX(const WindowInfo& wi) : Context(wi) {}
ContextGLX::~ContextGLX()
{
if (glXGetCurrentContext() == m_context)
glXMakeCurrent(GetDisplay(), None, nullptr);
if (m_context)
glXDestroyContext(GetDisplay(), m_context);
}
std::unique_ptr<Context> ContextGLX::Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try)
{
std::unique_ptr<ContextGLX> context = std::make_unique<ContextGLX>(wi);
if (!context->Initialize(versions_to_try, num_versions_to_try))
return nullptr;
return context;
}
bool ContextGLX::Initialize(const Version* versions_to_try, size_t num_versions_to_try)
{
const int screen = DefaultScreen(GetDisplay());
if (!gladLoadGLX(GetDisplay(), screen))
{
Log_ErrorPrintf("Loading GLAD GLX functions failed");
return false;
}
if (m_wi.type == WindowInfo::Type::X11)
{
if (!CreateWindow(screen))
return false;
}
else
{
Panic("Create pbuffer");
}
for (size_t i = 0; i < num_versions_to_try; i++)
{
const Version& cv = versions_to_try[i];
if (cv.profile == Profile::NoProfile && CreateAnyContext(nullptr, true))
{
m_version = cv;
return true;
}
else if (cv.profile != Profile::NoProfile && CreateVersionContext(cv, nullptr, true))
{
m_version = cv;
return true;
}
}
return false;
}
void* ContextGLX::GetProcAddress(const char* name)
{
return reinterpret_cast<void*>(glXGetProcAddress(reinterpret_cast<const GLubyte*>(name)));
}
bool ContextGLX::ChangeSurface(const WindowInfo& new_wi)
{
const bool was_current = (glXGetCurrentContext() == m_context);
if (was_current)
glXMakeCurrent(GetDisplay(), None, nullptr);
m_window.Destroy();
m_wi = new_wi;
if (new_wi.type == WindowInfo::Type::X11)
{
const int screen = DefaultScreen(GetDisplay());
if (!CreateWindow(screen))
return false;
}
if (was_current && !glXMakeCurrent(GetDisplay(), GetDrawable(), m_context))
{
Log_ErrorPrintf("Failed to make context current again after surface change");
return false;
}
return true;
}
void ContextGLX::ResizeSurface(u32 new_surface_width /*= 0*/, u32 new_surface_height /*= 0*/)
{
m_window.Resize();
m_wi.surface_width = m_window.GetWidth();
m_wi.surface_height = m_window.GetHeight();
}
bool ContextGLX::SwapBuffers()
{
glXSwapBuffers(GetDisplay(), GetDrawable());
return true;
}
bool ContextGLX::MakeCurrent()
{
return (glXMakeCurrent(GetDisplay(), GetDrawable(), m_context) == True);
}
bool ContextGLX::DoneCurrent()
{
return (glXMakeCurrent(GetDisplay(), None, nullptr) == True);
}
bool ContextGLX::SetSwapInterval(s32 interval)
{
if (GLAD_GLX_EXT_swap_control)
{
glXSwapIntervalEXT(GetDisplay(), GetDrawable(), interval);
return true;
}
else if (GLAD_GLX_MESA_swap_control)
{
return (glXSwapIntervalMESA(static_cast<u32>(std::max(interval, 0))) != 0);
}
else if (GLAD_GLX_SGI_swap_control)
{
return (glXSwapIntervalSGI(interval) != 0);
}
else
{
return false;
}
}
std::unique_ptr<Context> ContextGLX::CreateSharedContext(const WindowInfo& wi)
{
std::unique_ptr<ContextGLX> context = std::make_unique<ContextGLX>(wi);
if (wi.type == WindowInfo::Type::X11)
{
const int screen = DefaultScreen(context->GetDisplay());
if (!context->CreateWindow(screen))
return nullptr;
}
else
{
Panic("Create pbuffer");
}
if (m_version.profile == Profile::NoProfile)
{
if (!context->CreateAnyContext(m_context, false))
return nullptr;
}
else
{
if (!context->CreateVersionContext(m_version, m_context, false))
return nullptr;
}
context->m_version = m_version;
return context;
}
bool ContextGLX::CreateWindow(int screen)
{
int attribs[32] = {GLX_X_RENDERABLE, True, GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
GLX_X_VISUAL_TYPE, GLX_TRUE_COLOR, GLX_DOUBLEBUFFER, True};
int nattribs = 8;
switch (m_wi.surface_format)
{
case WindowInfo::SurfaceFormat::RGB8:
attribs[nattribs++] = GLX_RED_SIZE;
attribs[nattribs++] = 8;
attribs[nattribs++] = GLX_GREEN_SIZE;
attribs[nattribs++] = 8;
attribs[nattribs++] = GLX_BLUE_SIZE;
attribs[nattribs++] = 8;
break;
case WindowInfo::SurfaceFormat::RGBA8:
attribs[nattribs++] = GLX_RED_SIZE;
attribs[nattribs++] = 8;
attribs[nattribs++] = GLX_GREEN_SIZE;
attribs[nattribs++] = 8;
attribs[nattribs++] = GLX_BLUE_SIZE;
attribs[nattribs++] = 8;
attribs[nattribs++] = GLX_ALPHA_SIZE;
attribs[nattribs++] = 8;
break;
case WindowInfo::SurfaceFormat::RGB565:
attribs[nattribs++] = GLX_RED_SIZE;
attribs[nattribs++] = 5;
attribs[nattribs++] = GLX_GREEN_SIZE;
attribs[nattribs++] = 6;
attribs[nattribs++] = GLX_BLUE_SIZE;
attribs[nattribs++] = 5;
break;
default:
UnreachableCode();
break;
}
attribs[nattribs++] = None;
attribs[nattribs++] = 0;
int fbcount = 0;
GLXFBConfig* fbc = glXChooseFBConfig(GetDisplay(), screen, attribs, &fbcount);
if (!fbc || !fbcount)
{
Log_ErrorPrintf("glXChooseFBConfig() failed");
return false;
}
m_fb_config = *fbc;
XFree(fbc);
if (!GLAD_GLX_VERSION_1_3)
{
Log_ErrorPrintf("GLX Version 1.3 is required");
return false;
}
const XVisualInfo* vi = glXGetVisualFromFBConfig(GetDisplay(), m_fb_config);
if (!vi)
{
Log_ErrorPrintf("glXGetVisualFromFBConfig() failed");
return false;
}
return m_window.Create(GetDisplay(), static_cast<Window>(reinterpret_cast<uintptr_t>(m_wi.window_handle)), vi);
}
bool ContextGLX::CreateAnyContext(GLXContext share_context, bool make_current)
{
X11InhibitErrors ie;
m_context = glXCreateContext(GetDisplay(), m_vi, share_context, True);
if (!m_context || ie.HadError())
{
Log_ErrorPrintf("glxCreateContext() failed");
return false;
}
if (make_current)
{
if (!glXMakeCurrent(GetDisplay(), GetDrawable(), m_context))
{
Log_ErrorPrintf("glXMakeCurrent() failed");
return false;
}
}
return true;
}
bool ContextGLX::CreateVersionContext(const Version& version, GLXContext share_context, bool make_current)
{
// we need create context attribs
if (!GLAD_GLX_VERSION_1_3)
{
Log_ErrorPrint("Missing GLX version 1.3.");
return false;
}
int attribs[32];
int nattribs = 0;
attribs[nattribs++] = GLX_CONTEXT_PROFILE_MASK_ARB;
attribs[nattribs++] =
((version.profile == Profile::ES) ?
((version.major_version >= 2) ? GLX_CONTEXT_ES2_PROFILE_BIT_EXT : GLX_CONTEXT_ES_PROFILE_BIT_EXT) :
GLX_CONTEXT_CORE_PROFILE_BIT_ARB);
attribs[nattribs++] = GLX_CONTEXT_MAJOR_VERSION_ARB;
attribs[nattribs++] = version.major_version;
attribs[nattribs++] = GLX_CONTEXT_MINOR_VERSION_ARB;
attribs[nattribs++] = version.minor_version;
attribs[nattribs++] = None;
attribs[nattribs++] = 0;
X11InhibitErrors ie;
m_context = glXCreateContextAttribsARB(GetDisplay(), m_fb_config, share_context, True, attribs);
XSync(GetDisplay(), False);
if (ie.HadError())
m_context = nullptr;
if (!m_context)
return false;
if (make_current)
{
if (!glXMakeCurrent(GetDisplay(), GetDrawable(), m_context))
{
Log_ErrorPrint("glXMakeCurrent() failed");
glXDestroyContext(GetDisplay(), m_context);
m_context = nullptr;
return false;
}
}
return true;
}
} // namespace GL

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#pragma once
#include "context.h"
#include "glad_glx.h"
#include "x11_window.h"
namespace GL {
class ContextGLX final : public Context
{
public:
ContextGLX(const WindowInfo& wi);
~ContextGLX() override;
static std::unique_ptr<Context> Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try);
void* GetProcAddress(const char* name) override;
bool ChangeSurface(const WindowInfo& new_wi) override;
void ResizeSurface(u32 new_surface_width = 0, u32 new_surface_height = 0) override;
bool SwapBuffers() override;
bool MakeCurrent() override;
bool DoneCurrent() override;
bool SetSwapInterval(s32 interval) override;
std::unique_ptr<Context> CreateSharedContext(const WindowInfo& wi) override;
private:
ALWAYS_INLINE Display* GetDisplay() const { return static_cast<Display*>(m_wi.display_connection); }
ALWAYS_INLINE GLXDrawable GetDrawable() const { return static_cast<GLXDrawable>(m_window.GetWindow()); }
bool Initialize(const Version* versions_to_try, size_t num_versions_to_try);
bool CreateWindow(int screen);
bool CreateAnyContext(GLXContext share_context, bool make_current);
bool CreateVersionContext(const Version& version, GLXContext share_context, bool make_current);
GLXContext m_context = nullptr;
GLXFBConfig m_fb_config = {};
XVisualInfo* m_vi = nullptr;
X11Window m_window;
};
} // namespace GL

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#include "context_wgl.h"
#include "../assert.h"
#include "../log.h"
#include "glad.h"
#include "glad_wgl.h"
Log_SetChannel(GL::ContextWGL);
// TODO: get rid of this
#pragma comment(lib, "opengl32.lib")
static void* GetProcAddressCallback(const char* name)
{
void* addr = wglGetProcAddress(name);
if (addr)
return addr;
// try opengl32.dll
return ::GetProcAddress(GetModuleHandleA("opengl32.dll"), name);
}
namespace GL {
ContextWGL::ContextWGL(const WindowInfo& wi) : Context(wi) {}
ContextWGL::~ContextWGL()
{
if (wglGetCurrentContext() == m_rc)
wglMakeCurrent(m_dc, nullptr);
if (m_rc)
wglDeleteContext(m_rc);
if (m_dc)
ReleaseDC(GetHWND(), m_dc);
}
std::unique_ptr<Context> ContextWGL::Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try)
{
std::unique_ptr<ContextWGL> context = std::make_unique<ContextWGL>(wi);
if (!context->Initialize(versions_to_try, num_versions_to_try))
return nullptr;
return context;
}
bool ContextWGL::Initialize(const Version* versions_to_try, size_t num_versions_to_try)
{
if (m_wi.type == WindowInfo::Type::Win32)
{
if (!InitializeDC())
return false;
}
else
{
Panic("Create pbuffer");
}
// Everything including core/ES requires a dummy profile to load the WGL extensions.
if (!CreateAnyContext(nullptr, true))
return false;
for (size_t i = 0; i < num_versions_to_try; i++)
{
const Version& cv = versions_to_try[i];
if (cv.profile == Profile::NoProfile)
{
// we already have the dummy context, so just use that
m_version = cv;
return true;
}
else if (CreateVersionContext(cv, nullptr, true))
{
m_version = cv;
return true;
}
}
return false;
}
void* ContextWGL::GetProcAddress(const char* name)
{
return GetProcAddressCallback(name);
}
bool ContextWGL::ChangeSurface(const WindowInfo& new_wi)
{
const bool was_current = (wglGetCurrentContext() == m_rc);
if (m_dc)
{
ReleaseDC(GetHWND(), m_dc);
m_dc = {};
}
m_wi = new_wi;
if (!InitializeDC())
return false;
if (was_current && !wglMakeCurrent(m_dc, m_rc))
{
Log_ErrorPrintf("Failed to make context current again after surface change: 0x%08X", GetLastError());
return false;
}
return true;
}
void ContextWGL::ResizeSurface(u32 new_surface_width /*= 0*/, u32 new_surface_height /*= 0*/)
{
RECT client_rc = {};
GetClientRect(GetHWND(), &client_rc);
m_wi.surface_width = static_cast<u32>(client_rc.right - client_rc.left);
m_wi.surface_height = static_cast<u32>(client_rc.bottom - client_rc.top);
}
bool ContextWGL::SwapBuffers()
{
return ::SwapBuffers(m_dc);
}
bool ContextWGL::MakeCurrent()
{
if (!wglMakeCurrent(m_dc, m_rc))
{
Log_ErrorPrintf("wglMakeCurrent() failed: 0x%08X", GetLastError());
return false;
}
return true;
}
bool ContextWGL::DoneCurrent()
{
return wglMakeCurrent(m_dc, nullptr);
}
bool ContextWGL::SetSwapInterval(s32 interval)
{
if (!GLAD_WGL_EXT_swap_control)
return false;
return wglSwapIntervalEXT(interval);
}
std::unique_ptr<Context> ContextWGL::CreateSharedContext(const WindowInfo& wi)
{
std::unique_ptr<ContextWGL> context = std::make_unique<ContextWGL>(wi);
if (wi.type == WindowInfo::Type::Win32)
{
if (!context->InitializeDC())
return nullptr;
}
else
{
Panic("Create pbuffer");
}
if (m_version.profile == Profile::NoProfile)
{
if (!context->CreateAnyContext(m_rc, false))
return nullptr;
}
else
{
if (!context->CreateVersionContext(m_version, m_rc, false))
return nullptr;
}
context->m_version = m_version;
return context;
}
bool ContextWGL::InitializeDC()
{
PIXELFORMATDESCRIPTOR pfd = {};
pfd.nSize = sizeof(pfd);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.dwLayerMask = PFD_MAIN_PLANE;
switch (m_wi.surface_format)
{
case WindowInfo::SurfaceFormat::RGB8:
pfd.cColorBits = 32;
pfd.cRedBits = 8;
pfd.cGreenBits = 8;
pfd.cBlueBits = 8;
break;
case WindowInfo::SurfaceFormat::RGBA8:
pfd.cColorBits = 32;
pfd.cRedBits = 8;
pfd.cGreenBits = 8;
pfd.cBlueBits = 8;
pfd.cAlphaBits = 8;
break;
case WindowInfo::SurfaceFormat::RGB565:
pfd.cColorBits = 16;
pfd.cRedBits = 5;
pfd.cGreenBits = 6;
pfd.cBlueBits = 5;
break;
default:
UnreachableCode();
break;
}
m_dc = GetDC(GetHWND());
if (!m_dc)
{
Log_ErrorPrintf("GetDC() failed: 0x%08X", GetLastError());
return false;
}
const int pf = ChoosePixelFormat(m_dc, &pfd);
if (pf == 0)
{
Log_ErrorPrintf("ChoosePixelFormat() failed: 0x%08X", GetLastError());
return false;
}
if (!SetPixelFormat(m_dc, pf, &pfd))
{
Log_ErrorPrintf("SetPixelFormat() failed: 0x%08X", GetLastError());
return false;
}
return true;
}
bool ContextWGL::CreateAnyContext(HGLRC share_context, bool make_current)
{
m_rc = wglCreateContext(m_dc);
if (!m_rc)
{
Log_ErrorPrintf("wglCreateContext() failed: 0x%08X", GetLastError());
return false;
}
if (make_current)
{
if (!wglMakeCurrent(m_dc, m_rc))
{
Log_ErrorPrintf("wglMakeCurrent() failed: 0x%08X", GetLastError());
return false;
}
// re-init glad-wgl
if (!gladLoadWGLLoader([](const char* name) -> void* { return wglGetProcAddress(name); }, m_dc))
{
Log_ErrorPrintf("Loading GLAD WGL functions failed");
return false;
}
}
if (share_context && !wglShareLists(share_context, m_rc))
{
Log_ErrorPrintf("wglShareLists() failed: 0x%08X", GetLastError());
return false;
}
return true;
}
bool ContextWGL::CreateVersionContext(const Version& version, HGLRC share_context, bool make_current)
{
// we need create context attribs
if (!GLAD_WGL_ARB_create_context)
{
Log_ErrorPrint("Missing GLAD_WGL_ARB_create_context.");
return false;
}
HGLRC new_rc;
if (version.profile == Profile::Core)
{
const int attribs[] = {WGL_CONTEXT_PROFILE_MASK_ARB,
WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
WGL_CONTEXT_MAJOR_VERSION_ARB,
version.major_version,
WGL_CONTEXT_MINOR_VERSION_ARB,
version.minor_version,
#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
0,
0};
new_rc = wglCreateContextAttribsARB(m_dc, share_context, attribs);
}
else if (version.profile == Profile::ES)
{
const int attribs[] = {
WGL_CONTEXT_PROFILE_MASK_ARB,
((version.major_version >= 2) ? WGL_CONTEXT_ES2_PROFILE_BIT_EXT : WGL_CONTEXT_ES_PROFILE_BIT_EXT),
WGL_CONTEXT_MAJOR_VERSION_ARB,
version.major_version,
WGL_CONTEXT_MINOR_VERSION_ARB,
version.minor_version,
0,
0};
new_rc = wglCreateContextAttribsARB(m_dc, share_context, attribs);
}
else
{
Log_ErrorPrintf("Unknown profile");
return false;
}
if (!new_rc)
return false;
// destroy and swap contexts
if (m_rc)
{
if (!wglMakeCurrent(m_dc, make_current ? new_rc : nullptr))
{
Log_ErrorPrintf("wglMakeCurrent() failed: 0x%08X", GetLastError());
wglDeleteContext(new_rc);
return false;
}
// re-init glad-wgl
if (make_current && !gladLoadWGLLoader([](const char* name) -> void* { return wglGetProcAddress(name); }, m_dc))
{
Log_ErrorPrintf("Loading GLAD WGL functions failed");
return false;
}
wglDeleteContext(m_rc);
}
m_rc = new_rc;
return true;
}
} // namespace GL

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#pragma once
#include "../windows_headers.h"
#include "context.h"
#include <glad.h>
namespace GL {
class ContextWGL final : public Context
{
public:
ContextWGL(const WindowInfo& wi);
~ContextWGL() override;
static std::unique_ptr<Context> Create(const WindowInfo& wi, const Version* versions_to_try,
size_t num_versions_to_try);
void* GetProcAddress(const char* name) override;
bool ChangeSurface(const WindowInfo& new_wi) override;
void ResizeSurface(u32 new_surface_width = 0, u32 new_surface_height = 0) override;
bool SwapBuffers() override;
bool MakeCurrent() override;
bool DoneCurrent() override;
bool SetSwapInterval(s32 interval) override;
std::unique_ptr<Context> CreateSharedContext(const WindowInfo& wi) override;
private:
ALWAYS_INLINE HWND GetHWND() const { return static_cast<HWND>(m_wi.window_handle); }
bool Initialize(const Version* versions_to_try, size_t num_versions_to_try);
bool InitializeDC();
bool CreateAnyContext(HGLRC share_context, bool make_current);
bool CreateVersionContext(const Version& version, HGLRC share_context, bool make_current);
HDC m_dc = {};
HGLRC m_rc = {};
};
} // namespace GL

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#include "x11_window.h"
#include "../assert.h"
#include <cstdio>
namespace GL {
X11Window::X11Window() = default;
X11Window::~X11Window()
{
Destroy();
}
bool X11Window::Create(Display* display, Window parent_window, const XVisualInfo* vi)
{
m_display = display;
m_parent_window = parent_window;
XSync(m_display, True);
XWindowAttributes parent_wa = {};
XGetWindowAttributes(m_display, m_parent_window, &parent_wa);
m_width = static_cast<u32>(parent_wa.width);
m_height = static_cast<u32>(parent_wa.height);
// Failed X calls terminate the process so no need to check for errors.
// We could swap the error handler out here as well.
m_colormap = XCreateColormap(m_display, m_parent_window, vi->visual, AllocNone);
XSetWindowAttributes wa = {};
wa.colormap = m_colormap;
m_window = XCreateWindow(m_display, m_parent_window, 0, 0, m_width, m_height, 0, vi->depth, InputOutput, vi->visual,
CWColormap, &wa);
XMapWindow(m_display, m_window);
XSync(m_display, True);
return true;
}
void X11Window::Destroy()
{
if (m_window)
{
XUnmapWindow(m_display, m_window);
XDestroyWindow(m_display, m_window);
m_window = {};
}
if (m_colormap)
{
XFreeColormap(m_display, m_colormap);
m_colormap = {};
}
}
void X11Window::Resize(u32 width, u32 height)
{
if (width != 0 && height != 0)
{
m_width = width;
m_height = height;
}
else
{
XWindowAttributes parent_wa = {};
XGetWindowAttributes(m_display, m_parent_window, &parent_wa);
m_width = static_cast<u32>(parent_wa.width);
m_height = static_cast<u32>(parent_wa.height);
}
XResizeWindow(m_display, m_window, m_width, m_height);
}
static X11InhibitErrors* s_current_error_inhibiter;
X11InhibitErrors::X11InhibitErrors()
{
Assert(!s_current_error_inhibiter);
m_old_handler = XSetErrorHandler(ErrorHandler);
s_current_error_inhibiter = this;
}
X11InhibitErrors::~X11InhibitErrors()
{
Assert(s_current_error_inhibiter == this);
s_current_error_inhibiter = nullptr;
XSetErrorHandler(m_old_handler);
}
int X11InhibitErrors::ErrorHandler(Display* display, XErrorEvent* ee)
{
s_current_error_inhibiter->m_had_error = true;
return 0;
}
} // namespace GL

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#pragma once
#include "../types.h"
#include <X11/Xlib.h>
#include <X11/Xutil.h>
namespace GL {
class X11Window
{
public:
X11Window();
~X11Window();
ALWAYS_INLINE Window GetWindow() const { return m_window; }
ALWAYS_INLINE u32 GetWidth() const { return m_width; }
ALWAYS_INLINE u32 GetHeight() const { return m_height; }
bool Create(Display* display, Window parent_window, const XVisualInfo* vi);
void Destroy();
// Setting a width/height of 0 will use parent dimensions.
void Resize(u32 width = 0, u32 height = 0);
private:
Display* m_display = nullptr;
Window m_parent_window = {};
Window m_window = {};
Colormap m_colormap = {};
u32 m_width = 0;
u32 m_height = 0;
};
// Helper class for managing X errors
class X11InhibitErrors
{
public:
X11InhibitErrors();
~X11InhibitErrors();
ALWAYS_INLINE bool HadError() const { return m_had_error; }
private:
static int ErrorHandler(Display* display, XErrorEvent* ee);
XErrorHandler m_old_handler = {};
bool m_had_error = false;
};
} // namespace GL

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#pragma once
// Contains the information required to create a graphics context in a window.
struct WindowInfo
{
enum class Type
{
Surfaceless,
Win32,
X11,
Wayland,
MacOS,
Android
};
enum class SurfaceFormat
{
None,
RGB8,
RGBA8,
RGB565,
Count
};
Type type = Type::Surfaceless;
void* display_connection = nullptr;
void* window_handle = nullptr;
u32 surface_width = 0;
u32 surface_height = 0;
SurfaceFormat surface_format = SurfaceFormat::RGB8;
};