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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/video/capture/screen/mac/scoped_pixel_buffer_object.h"
namespace media {
ScopedPixelBufferObject::ScopedPixelBufferObject()
: cgl_context_(NULL),
pixel_buffer_object_(0) {
}
ScopedPixelBufferObject::~ScopedPixelBufferObject() {
Release();
}
bool ScopedPixelBufferObject::Init(CGLContextObj cgl_context,
int size_in_bytes) {
cgl_context_ = cgl_context;
CGLContextObj CGL_MACRO_CONTEXT = cgl_context_;
glGenBuffersARB(1, &pixel_buffer_object_);
if (glGetError() == GL_NO_ERROR) {
glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, pixel_buffer_object_);
glBufferDataARB(GL_PIXEL_PACK_BUFFER_ARB, size_in_bytes, NULL,
GL_STREAM_READ_ARB);
glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, 0);
if (glGetError() != GL_NO_ERROR) {
Release();
}
} else {
cgl_context_ = NULL;
pixel_buffer_object_ = 0;
}
return pixel_buffer_object_ != 0;
}
void ScopedPixelBufferObject::Release() {
if (pixel_buffer_object_) {
CGLContextObj CGL_MACRO_CONTEXT = cgl_context_;
glDeleteBuffersARB(1, &pixel_buffer_object_);
cgl_context_ = NULL;
pixel_buffer_object_ = 0;
}
}
} // namespace media
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