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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkTypes.h"
#if defined(SK_BUILD_FOR_MAC)
#include "gl/SkGLContext.h"
#include "AvailabilityMacros.h"
#include <OpenGL/OpenGL.h>
#include <dlfcn.h>
namespace {
class MacGLContext : public SkGLContext {
public:
MacGLContext();
~MacGLContext() override;
private:
void destroyGLContext();
void onPlatformMakeCurrent() const override;
void onPlatformSwapBuffers() const override;
GrGLFuncPtr onPlatformGetProcAddress(const char*) const override;
CGLContextObj fContext;
void* fGLLibrary;
};
MacGLContext::MacGLContext()
: fContext(nullptr)
, fGLLibrary(RTLD_DEFAULT) {
CGLPixelFormatAttribute attributes[] = {
#if MAC_OS_X_VERSION_10_7
kCGLPFAOpenGLProfile, (CGLPixelFormatAttribute) kCGLOGLPVersion_3_2_Core,
#endif
kCGLPFADoubleBuffer,
(CGLPixelFormatAttribute)0
};
CGLPixelFormatObj pixFormat;
GLint npix;
CGLChoosePixelFormat(attributes, &pixFormat, &npix);
if (nullptr == pixFormat) {
SkDebugf("CGLChoosePixelFormat failed.");
return;
}
CGLCreateContext(pixFormat, nullptr, &fContext);
CGLReleasePixelFormat(pixFormat);
if (nullptr == fContext) {
SkDebugf("CGLCreateContext failed.");
return;
}
CGLSetCurrentContext(fContext);
SkAutoTUnref<const GrGLInterface> gl(GrGLCreateNativeInterface());
if (nullptr == gl.get()) {
SkDebugf("Context could not create GL interface.\n");
this->destroyGLContext();
return;
}
if (!gl->validate()) {
SkDebugf("Context could not validate GL interface.\n");
this->destroyGLContext();
return;
}
fGLLibrary = dlopen(
"/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib",
RTLD_LAZY);
this->init(gl.detach());
}
MacGLContext::~MacGLContext() {
this->teardown();
this->destroyGLContext();
}
void MacGLContext::destroyGLContext() {
if (fContext) {
CGLReleaseContext(fContext);
fContext = nullptr;
}
if (RTLD_DEFAULT != fGLLibrary) {
dlclose(fGLLibrary);
}
}
void MacGLContext::onPlatformMakeCurrent() const {
CGLSetCurrentContext(fContext);
}
void MacGLContext::onPlatformSwapBuffers() const {
CGLFlushDrawable(fContext);
}
GrGLFuncPtr MacGLContext::onPlatformGetProcAddress(const char* procName) const {
return reinterpret_cast<GrGLFuncPtr>(dlsym(fGLLibrary, procName));
}
} // anonymous namespace
SkGLContext* SkCreatePlatformGLContext(GrGLStandard forcedGpuAPI, SkGLContext* shareContext) {
SkASSERT(!shareContext);
if (shareContext) {
return nullptr;
}
if (kGLES_GrGLStandard == forcedGpuAPI) {
return nullptr;
}
MacGLContext* ctx = new MacGLContext;
if (!ctx->isValid()) {
delete ctx;
return nullptr;
}
return ctx;
}
#endif//defined(SK_BUILD_FOR_MAC)
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