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
ScopedPixelBufferObject()17 ScopedPixelBufferObject::ScopedPixelBufferObject()
18 : cgl_context_(NULL),
19 pixel_buffer_object_(0) {
20 }
21
~ScopedPixelBufferObject()22 ScopedPixelBufferObject::~ScopedPixelBufferObject() {
23 Release();
24 }
25
Init(CGLContextObj cgl_context,int size_in_bytes)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
Release()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