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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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"
#if USE(ACCELERATED_COMPOSITING)
#include "CanvasLayerChromium.h"
#include "GraphicsContext3D.h"
#include <GLES2/gl2.h>
namespace WebCore {
unsigned CanvasLayerChromium::m_shaderProgramId = 0;
PassRefPtr<CanvasLayerChromium> CanvasLayerChromium::create(GraphicsLayerChromium* owner)
{
return adoptRef(new CanvasLayerChromium(owner));
}
CanvasLayerChromium::CanvasLayerChromium(GraphicsLayerChromium* owner)
: LayerChromium(owner)
, m_context(0)
, m_textureId(0)
, m_textureChanged(false)
{
}
unsigned CanvasLayerChromium::textureId()
{
return m_textureId;
}
void CanvasLayerChromium::updateTextureContents(unsigned textureId)
{
ASSERT(textureId == m_textureId);
ASSERT(m_context);
if (m_textureChanged) {
glBindTexture(GL_TEXTURE_2D, m_textureId);
// Set the min-mag filters to linear and wrap modes to GL_CLAMP_TO_EDGE
// to get around NPOT texture limitations of GLES.
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
m_textureChanged = false;
}
// Update the contents of the texture used by the compositor.
if (m_contentsDirty) {
if (m_prepareTextureCallback)
m_prepareTextureCallback->willPrepareTexture();
m_context->prepareTexture();
m_contentsDirty = false;
}
}
void CanvasLayerChromium::setContext(const GraphicsContext3D* context)
{
m_context = const_cast<GraphicsContext3D*>(context);
unsigned int textureId = m_context->platformTexture();
if (textureId != m_textureId)
m_textureChanged = true;
m_textureId = textureId;
}
}
#endif // USE(ACCELERATED_COMPOSITING)
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