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/*
* Copyright (C) 2011, 2012, 2013 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 "LayerTexture.h"
#if USE(ACCELERATED_COMPOSITING)
#include "Color.h"
#include "IntRect.h"
#include "TextureCacheCompositingThread.h"
#include <BlackBerryPlatformGLES2ContextState.h>
#include <BlackBerryPlatformGraphicsContext.h>
#include <GLES2/gl2.h>
#include <wtf/CurrentTime.h>
#include <wtf/OwnArrayPtr.h>
namespace WebCore {
LayerTexture::LayerTexture(bool isColor)
: m_protectionCount(0)
, m_buffer(0)
, m_isColor(isColor)
, m_bufferSizeInBytes(0)
{
textureCacheCompositingThread()->install(this, IntSize(), BlackBerry::Platform::Graphics::BackedWhenNecessary);
}
LayerTexture::~LayerTexture()
{
textureCacheCompositingThread()->textureDestroyed(this);
}
void LayerTexture::updateContents(BlackBerry::Platform::Graphics::Buffer* buffer)
{
if (m_buffer)
BlackBerry::Platform::Graphics::destroyBuffer(m_buffer);
m_buffer = buffer;
size_t newBufferSizeInBytes = BlackBerry::Platform::Graphics::bufferSizeInBytes(m_buffer);
textureCacheCompositingThread()->textureSizeInBytesChanged(this, newBufferSizeInBytes - m_bufferSizeInBytes);
m_bufferSizeInBytes = newBufferSizeInBytes;
}
void LayerTexture::setContentsToColor(const Color& color)
{
RGBA32 rgba = color.rgb();
if (m_buffer)
BlackBerry::Platform::Graphics::destroyBuffer(m_buffer);
m_buffer = BlackBerry::Platform::Graphics::createBuffer(IntSize(1, 1), BlackBerry::Platform::Graphics::BackedWhenNecessary);
if (BlackBerry::Platform::Graphics::PlatformGraphicsContext* gc = lockBufferDrawable(m_buffer)) {
gc->setFillColor(rgba);
gc->addFillRect(BlackBerry::Platform::FloatRect(0, 0, 1, 1));
}
releaseBufferDrawable(m_buffer);
IntSize oldSize = m_size;
m_size = IntSize(1, 1);
if (m_size != oldSize)
textureCacheCompositingThread()->textureResized(this, oldSize);
}
bool LayerTexture::protect(const IntSize& size, BlackBerry::Platform::Graphics::BufferType type)
{
if (!m_buffer) {
// We may have been evicted by the TextureCacheCompositingThread,
// attempt to install us again.
if (!textureCacheCompositingThread()->install(this, size, type))
return false;
}
++m_protectionCount;
if (m_size == size)
return true;
textureCacheCompositingThread()->resizeTexture(this, size, type);
return true;
}
Platform3DObject LayerTexture::platformTexture() const
{
using namespace BlackBerry::Platform::Graphics;
Platform3DObject platformTexture = reinterpret_cast<Platform3DObject>(platformBufferHandle(m_buffer));
// Force creation if it's 0.
if (!platformTexture) {
// This call can cause display list to render to backing, which can mutate a lot of GL state.
GLES2ContextState::VertexAttributeStateSaver vertexAttribStateSaver;
GLES2ContextState::ProgramStateSaver programSaver;
GLES2ContextState::TextureAndFBOStateSaver textureSaver;
lockAndBindBufferGLTexture(m_buffer, GL_TEXTURE_2D);
platformTexture = reinterpret_cast<Platform3DObject>(platformBufferHandle(m_buffer));
}
return platformTexture;
}
} // namespace WebCore
#endif // USE(ACCELERATED_COMPOSITING)
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