The Tor Browser: gfx/skia/trunk/src/gpu/gl/mac/SkNativeGLContext

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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"

    11 SkNativeGLContext::AutoContextRestore::AutoContextRestore() {

    12     fOldCGLContext = CGLGetCurrentContext();

    13 }

    15 SkNativeGLContext::AutoContextRestore::~AutoContextRestore() {

    16     CGLSetCurrentContext(fOldCGLContext);

    17 }

    19 ///////////////////////////////////////////////////////////////////////////////

    21 SkNativeGLContext::SkNativeGLContext()

    22     : fContext(NULL) {

    23 }

    25 SkNativeGLContext::~SkNativeGLContext() {

    26     this->destroyGLContext();

    27 }

    29 void SkNativeGLContext::destroyGLContext() {

    30     if (NULL != fContext) {

    31         CGLReleaseContext(fContext);

    32     }

    33 }

    35 const GrGLInterface* SkNativeGLContext::createGLContext() {

    36     SkASSERT(NULL == fContext);

    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;

    48     CGLChoosePixelFormat(attributes, &pixFormat, &npix);

    50     if (NULL == pixFormat) {

    51         SkDebugf("CGLChoosePixelFormat failed.");

    52         return NULL;

    53     }

    55     CGLCreateContext(pixFormat, NULL, &fContext);

    56     CGLReleasePixelFormat(pixFormat);

    58     if (NULL == fContext) {

    59         SkDebugf("CGLCreateContext failed.");

    60         return NULL;

    61     }

    63     CGLSetCurrentContext(fContext);

    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     }

    72     return interface;

    73 }

    75 void SkNativeGLContext::makeCurrent() const {

    76     CGLSetCurrentContext(fContext);

    77 }

    79 void SkNativeGLContext::swapBuffers() const {

    80     CGLFlushDrawable(fContext);

    81 }

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