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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 "gl/SkGLContext.h"
#include "AvailabilityMacros.h"
#include <OpenGL/OpenGL.h>
namespace {
class MacGLContext : public SkGLContext {
public:
MacGLContext();
~MacGLContext() SK_OVERRIDE;
void makeCurrent() const SK_OVERRIDE;
void swapBuffers() const SK_OVERRIDE;
private:
void destroyGLContext();
CGLContextObj fContext;
};
MacGLContext::MacGLContext()
: fContext(NULL) {
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 (NULL == pixFormat) {
SkDebugf("CGLChoosePixelFormat failed.");
return;
}
CGLCreateContext(pixFormat, NULL, &fContext);
CGLReleasePixelFormat(pixFormat);
if (NULL == fContext) {
SkDebugf("CGLCreateContext failed.");
return;
}
CGLSetCurrentContext(fContext);
fGL.reset(GrGLCreateNativeInterface());
if (NULL == fGL.get()) {
SkDebugf("Context could not create GL interface.\n");
this->destroyGLContext();
return;
}
if (!fGL->validate()) {
SkDebugf("Context could not validate GL interface.\n");
this->destroyGLContext();
return;
}
}
MacGLContext::~MacGLContext() {
this->destroyGLContext();
}
void MacGLContext::destroyGLContext() {
fGL.reset(NULL);
if (fContext) {
CGLReleaseContext(fContext);
fContext = NULL;
}
}
void MacGLContext::makeCurrent() const {
CGLSetCurrentContext(fContext);
}
void MacGLContext::swapBuffers() const {
CGLFlushDrawable(fContext);
}
} // anonymous namespace
SkGLContext* SkCreatePlatformGLContext(GrGLStandard forcedGpuAPI) {
if (kGLES_GrGLStandard == forcedGpuAPI) {
return NULL;
}
MacGLContext* ctx = SkNEW(MacGLContext);
if (!ctx->isValid()) {
SkDELETE(ctx);
return NULL;
}
return ctx;
}
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