1 /* 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "webrtc/modules/desktop_capture/mac/scoped_pixel_buffer_object.h" 12 13 #include <stddef.h> 14 15 namespace webrtc { 16 17 ScopedPixelBufferObject::ScopedPixelBufferObject() 18 : cgl_context_(NULL), 19 pixel_buffer_object_(0) { 20 } 21 22 ScopedPixelBufferObject::~ScopedPixelBufferObject() { 23 Release(); 24 } 25 26 bool ScopedPixelBufferObject::Init(CGLContextObj cgl_context, 27 int size_in_bytes) { 28 cgl_context_ = cgl_context; 29 CGLContextObj CGL_MACRO_CONTEXT = cgl_context_; 30 glGenBuffersARB(1, &pixel_buffer_object_); 31 if (glGetError() == GL_NO_ERROR) { 32 glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, pixel_buffer_object_); 33 glBufferDataARB(GL_PIXEL_PACK_BUFFER_ARB, size_in_bytes, NULL, 34 GL_STREAM_READ_ARB); 35 glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, 0); 36 if (glGetError() != GL_NO_ERROR) { 37 Release(); 38 } 39 } else { 40 cgl_context_ = NULL; 41 pixel_buffer_object_ = 0; 42 } 43 return pixel_buffer_object_ != 0; 44 } 45 46 void ScopedPixelBufferObject::Release() { 47 if (pixel_buffer_object_) { 48 CGLContextObj CGL_MACRO_CONTEXT = cgl_context_; 49 glDeleteBuffersARB(1, &pixel_buffer_object_); 50 cgl_context_ = NULL; 51 pixel_buffer_object_ = 0; 52 } 53 } 54 55 } // namespace webrtc 56
