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/*
* Copyright (C) 2012 Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "SnapshotImageGL.h"
#if USE(ACCELERATED_COMPOSITING)
#if USE(OPENGL_ES_2)
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#else
#include "OpenGLShims.h"
#endif
unsigned char* getImageFromCurrentTexture(int width, int height, int textureId)
{
glBindTexture(GL_TEXTURE_2D, textureId);
unsigned char* buffer = new unsigned char[width * height * 4];
glReadPixels(0, 0, width, height, GL_BGRA, GL_UNSIGNED_BYTE, buffer);
// Textures are flipped on the Y axis, so we need to flip the image back.
unsigned tmp;
unsigned* buf = reinterpret_cast<unsigned*>(buffer);
for (int i = 0; i < height / 2; ++i) {
for (int j = 0; j < width; ++j) {
tmp = buf[i * width + j];
buf[i * width + j] = buf[(height - i - 1) * width + j];
buf[(height - i - 1) * width + j] = tmp;
}
}
return buffer;
}
#endif
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