michael@0: 
michael@0: /*
michael@0:  * Copyright 2011 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: #include "gl/SkNativeGLContext.h"
michael@0: #include "AvailabilityMacros.h"
michael@0: 
michael@0: SkNativeGLContext::AutoContextRestore::AutoContextRestore() {
michael@0:     fOldCGLContext = CGLGetCurrentContext();
michael@0: }
michael@0: 
michael@0: SkNativeGLContext::AutoContextRestore::~AutoContextRestore() {
michael@0:     CGLSetCurrentContext(fOldCGLContext);
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: SkNativeGLContext::SkNativeGLContext()
michael@0:     : fContext(NULL) {
michael@0: }
michael@0: 
michael@0: SkNativeGLContext::~SkNativeGLContext() {
michael@0:     this->destroyGLContext();
michael@0: }
michael@0: 
michael@0: void SkNativeGLContext::destroyGLContext() {
michael@0:     if (NULL != fContext) {
michael@0:         CGLReleaseContext(fContext);
michael@0:     }
michael@0: }
michael@0: 
michael@0: const GrGLInterface* SkNativeGLContext::createGLContext() {
michael@0:     SkASSERT(NULL == fContext);
michael@0: 
michael@0:     CGLPixelFormatAttribute attributes[] = {
michael@0: #if MAC_OS_X_VERSION_10_7
michael@0:         kCGLPFAOpenGLProfile, (CGLPixelFormatAttribute) kCGLOGLPVersion_3_2_Core,
michael@0: #endif
michael@0:         kCGLPFADoubleBuffer,
michael@0:         (CGLPixelFormatAttribute)0
michael@0:     };
michael@0:     CGLPixelFormatObj pixFormat;
michael@0:     GLint npix;
michael@0: 
michael@0:     CGLChoosePixelFormat(attributes, &pixFormat, &npix);
michael@0: 
michael@0:     if (NULL == pixFormat) {
michael@0:         SkDebugf("CGLChoosePixelFormat failed.");
michael@0:         return NULL;
michael@0:     }
michael@0: 
michael@0:     CGLCreateContext(pixFormat, NULL, &fContext);
michael@0:     CGLReleasePixelFormat(pixFormat);
michael@0: 
michael@0:     if (NULL == fContext) {
michael@0:         SkDebugf("CGLCreateContext failed.");
michael@0:         return NULL;
michael@0:     }
michael@0: 
michael@0:     CGLSetCurrentContext(fContext);
michael@0: 
michael@0:     const GrGLInterface* interface = GrGLCreateNativeInterface();
michael@0:     if (NULL == interface) {
michael@0:         SkDebugf("Context could not create GL interface.\n");
michael@0:         this->destroyGLContext();
michael@0:         return NULL;
michael@0:     }
michael@0: 
michael@0:     return interface;
michael@0: }
michael@0: 
michael@0: void SkNativeGLContext::makeCurrent() const {
michael@0:     CGLSetCurrentContext(fContext);
michael@0: }
michael@0: 
michael@0: void SkNativeGLContext::swapBuffers() const {
michael@0:     CGLFlushDrawable(fContext);
michael@0: }