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/*
* Copyright (C) 2012 Research In Motion Limited. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "EGLImageLayerCompositingThreadClient.h"
#if USE(ACCELERATED_COMPOSITING)
#include "LayerCompositingThread.h"
#include <BlackBerryPlatformGraphics.h>
#include <BlackBerryPlatformLog.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
namespace WebCore {
static PFNGLEGLIMAGETARGETTEXTURE2DOESPROC glEGLImageTargetTexture2DOES = 0;
static PFNEGLDESTROYIMAGEKHRPROC eglDestroyImageKHR = 0;
EGLImageLayerCompositingThreadClient::~EGLImageLayerCompositingThreadClient()
{
// Someone should have called deleteTextures() by now
ASSERT(!m_texture && !m_image);
}
void EGLImageLayerCompositingThreadClient::uploadTexturesIfNeeded(LayerCompositingThread*)
{
if (!m_imageChanged)
return;
if (!glEGLImageTargetTexture2DOES) {
glEGLImageTargetTexture2DOES = reinterpret_cast<PFNGLEGLIMAGETARGETTEXTURE2DOESPROC>(eglGetProcAddress("glEGLImageTargetTexture2DOES"));
ASSERT(glEGLImageTargetTexture2DOES);
if (!glEGLImageTargetTexture2DOES) {
using namespace BlackBerry::Platform;
logAlways(LogLevelWarn, "eglGetProcAddress for glEGLImageTargetTexture2DOES FAILED");
m_imageChanged = false;
return;
}
}
if (m_image) {
if (!m_texture) {
m_texture = Texture::create();
m_texture->protect();
}
// Connect to the new image
glBindTexture(GL_TEXTURE_2D, m_texture->textureId());
glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, m_image);
} else if (m_texture) {
m_texture->unprotect();
m_texture.clear();
}
m_imageChanged = false;
}
void EGLImageLayerCompositingThreadClient::drawTextures(LayerCompositingThread* layer, double /*scale*/, int positionLocation, int texCoordLocation)
{
static float upsideDown[4 * 2] = { 0, 1, 0, 0, 1, 0, 1, 1 };
if (!m_texture)
return;
glVertexAttribPointer(positionLocation, 2, GL_FLOAT, GL_FALSE, 0, &layer->getTransformedBounds());
glVertexAttribPointer(texCoordLocation, 2, GL_FLOAT, GL_FALSE, 0, upsideDown);
glBindTexture(GL_TEXTURE_2D, m_texture->textureId());
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
}
void EGLImageLayerCompositingThreadClient::deleteTextures(LayerCompositingThread*)
{
if (m_texture) {
m_texture->unprotect();
m_texture.clear();
}
if (!m_image)
return;
// If the image is still with us, it was never destroyed by the EGLImageLayerWebKitThread.
if (!eglDestroyImageKHR)
eglDestroyImageKHR = reinterpret_cast<PFNEGLDESTROYIMAGEKHRPROC>(eglGetProcAddress("eglDestroyImageKHR"));
ASSERT(eglDestroyImageKHR);
if (eglDestroyImageKHR)
eglDestroyImageKHR(BlackBerry::Platform::Graphics::eglDisplay(), m_image);
m_image = 0;
}
void EGLImageLayerCompositingThreadClient::bindContentsTexture(LayerCompositingThread*)
{
glBindTexture(GL_TEXTURE_2D, m_texture->textureId());
}
void EGLImageLayerCompositingThreadClient::setImage(void* image)
{
if (m_image == image)
return;
m_image = image;
m_imageChanged = true;
}
} // namespace WebCore
#endif // USE(ACCELERATED_COMPOSITING)
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