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/*
* Copyright 2010, The Android Open Source Project
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``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"
#include "BackedDoubleBufferedTexture.h"
#include "BaseTile.h"
#include "GLUtils.h"
#define LOG_NDEBUG 1
#define LOG_TAG "BackedDoubleBufferedTexture.cpp"
#include <utils/Log.h>
namespace WebCore {
BackedDoubleBufferedTexture::BackedDoubleBufferedTexture(uint32_t w, uint32_t h,
SkBitmap::Config config)
: DoubleBufferedTexture(eglGetCurrentContext())
, m_usedLevel(-1)
, m_owner(0)
, m_busy(false)
{
m_bitmap.setConfig(config, w, h);
m_bitmap.allocPixels();
m_bitmap.eraseColor(0);
m_canvas = new SkCanvas(m_bitmap);
}
BackedDoubleBufferedTexture::~BackedDoubleBufferedTexture()
{
m_bitmap.reset();
delete m_canvas;
}
TextureInfo* BackedDoubleBufferedTexture::producerLock()
{
m_varLock.lock();
m_busy = true;
m_varLock.unlock();
return DoubleBufferedTexture::producerLock();
}
void BackedDoubleBufferedTexture::producerRelease()
{
DoubleBufferedTexture::producerRelease();
android::Mutex::Autolock lock(m_varLock);
m_busy = false;
}
void BackedDoubleBufferedTexture::producerReleaseAndSwap()
{
DoubleBufferedTexture::producerReleaseAndSwap();
android::Mutex::Autolock lock(m_varLock);
m_busy = false;
}
void BackedDoubleBufferedTexture::producerUpdate(BaseTile* painter,
TextureInfo* textureInfo, PaintingInfo& info)
{
// no need to upload a texture since the bitmap is empty
if (!m_bitmap.width() && !m_bitmap.height()) {
producerRelease();
return;
}
if (textureInfo->m_width == m_bitmap.width() && textureInfo->m_height == m_bitmap.height())
GLUtils::updateTextureWithBitmap(textureInfo->m_textureId, m_bitmap);
else {
GLUtils::createTextureWithBitmap(textureInfo->m_textureId, m_bitmap);
textureInfo->m_width = m_bitmap.width();
textureInfo->m_height = m_bitmap.height();
}
m_varLock.lock();
// set the painting information for this texture
if (equalsIdTextureA(textureInfo->m_textureId))
m_paintingInfoA = info;
else if (equalsIdTextureB(textureInfo->m_textureId))
m_paintingInfoB = info;
m_varLock.unlock();
producerReleaseAndSwap();
}
// Compare the current texture displayed with some PaintingInfo.
bool BackedDoubleBufferedTexture::consumerTextureUpToDate(PaintingInfo& info)
{
android::Mutex::Autolock lock(m_varLock);
if (isTextureAReadable())
return info == m_paintingInfoA;
return info == m_paintingInfoB;
}
bool BackedDoubleBufferedTexture::consumerTextureSimilar(PaintingInfo& info)
{
android::Mutex::Autolock lock(m_varLock);
if (isTextureAReadable())
return info.similar(m_paintingInfoA);
return info.similar(m_paintingInfoB);
}
bool BackedDoubleBufferedTexture::acquire(BaseTile* owner)
{
if (m_owner == owner)
return true;
// if the writable texture is busy (i.e. currently being written to) then we
// can't change the owner out from underneath that texture
m_varLock.lock();
if (m_busy)
return false;
m_varLock.unlock();
if (m_owner)
m_owner->removeTexture();
m_owner = owner;
return true;
}
} // namespace WebCore
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