1 2 /* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 #include "gl/SkNativeGLContext.h" 9 #include "AvailabilityMacros.h" 10 11 SkNativeGLContext::AutoContextRestore::AutoContextRestore() { 12 fOldCGLContext = CGLGetCurrentContext(); 13 } 14 15 SkNativeGLContext::AutoContextRestore::~AutoContextRestore() { 16 CGLSetCurrentContext(fOldCGLContext); 17 } 18 19 /////////////////////////////////////////////////////////////////////////////// 20 21 SkNativeGLContext::SkNativeGLContext() 22 : fContext(NULL) { 23 } 24 25 SkNativeGLContext::~SkNativeGLContext() { 26 this->destroyGLContext(); 27 } 28 29 void SkNativeGLContext::destroyGLContext() { 30 if (NULL != fContext) { 31 CGLReleaseContext(fContext); 32 } 33 } 34 35 const GrGLInterface* SkNativeGLContext::createGLContext() { 36 SkASSERT(NULL == fContext); 37 38 CGLPixelFormatAttribute attributes[] = { 39 #if MAC_OS_X_VERSION_10_7 40 kCGLPFAOpenGLProfile, (CGLPixelFormatAttribute) kCGLOGLPVersion_3_2_Core, 41 #endif 42 kCGLPFADoubleBuffer, 43 (CGLPixelFormatAttribute)0 44 }; 45 CGLPixelFormatObj pixFormat; 46 GLint npix; 47 48 CGLChoosePixelFormat(attributes, &pixFormat, &npix); 49 50 if (NULL == pixFormat) { 51 SkDebugf("CGLChoosePixelFormat failed."); 52 return NULL; 53 } 54 55 CGLCreateContext(pixFormat, NULL, &fContext); 56 CGLReleasePixelFormat(pixFormat); 57 58 if (NULL == fContext) { 59 SkDebugf("CGLCreateContext failed."); 60 return NULL; 61 } 62 63 CGLSetCurrentContext(fContext); 64 65 const GrGLInterface* interface = GrGLCreateNativeInterface(); 66 if (NULL == interface) { 67 SkDebugf("Context could not create GL interface.\n"); 68 this->destroyGLContext(); 69 return NULL; 70 } 71 72 return interface; 73 } 74 75 void SkNativeGLContext::makeCurrent() const { 76 CGLSetCurrentContext(fContext); 77 } 78 79 void SkNativeGLContext::swapBuffers() const { 80 CGLFlushDrawable(fContext); 81 } 82
