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/*
* Copyright (C) 2011 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:
*
* 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 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 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"
#if USE(ACCELERATED_COMPOSITING)
#include "cc/CCTextureUpdater.h"
#include "CCPrioritizedTexture.h"
#include "GraphicsContext3D.h"
#include "LayerTextureUpdater.h"
#include "TextureCopier.h"
#include "TextureUploader.h"
using namespace std;
namespace WebCore {
static const int kUploadFlushPeriod = 4;
CCTextureUpdater::CCTextureUpdater()
: m_entryIndex(0)
{
}
CCTextureUpdater::~CCTextureUpdater()
{
}
void CCTextureUpdater::appendUpdate(LayerTextureUpdater::Texture* texture, const IntRect& sourceRect, const IntRect& destRect, Vector<UpdateEntry>& entries)
{
ASSERT(texture);
UpdateEntry entry;
entry.texture = texture;
entry.sourceRect = sourceRect;
entry.destRect = destRect;
entries.append(entry);
}
void CCTextureUpdater::appendFullUpdate(LayerTextureUpdater::Texture* texture, const IntRect& sourceRect, const IntRect& destRect)
{
appendUpdate(texture, sourceRect, destRect, m_fullEntries);
}
void CCTextureUpdater::appendPartialUpdate(LayerTextureUpdater::Texture* texture, const IntRect& sourceRect, const IntRect& destRect)
{
appendUpdate(texture, sourceRect, destRect, m_partialEntries);
}
void CCTextureUpdater::appendCopy(unsigned sourceTexture, unsigned destTexture, const IntSize& size)
{
CopyEntry copy;
copy.sourceTexture = sourceTexture;
copy.destTexture = destTexture;
copy.size = size;
m_copyEntries.append(copy);
}
bool CCTextureUpdater::hasMoreUpdates() const
{
return m_fullEntries.size() || m_partialEntries.size() || m_copyEntries.size();
}
void CCTextureUpdater::update(CCResourceProvider* resourceProvider, TextureCopier* copier, TextureUploader* uploader, size_t count)
{
size_t index;
if (m_fullEntries.size() || m_partialEntries.size()) {
if (uploader->isBusy())
return;
uploader->beginUploads();
int fullUploadCount = 0;
size_t maxIndex = min(m_entryIndex + count, m_fullEntries.size());
for (index = m_entryIndex; index < maxIndex; ++index) {
UpdateEntry& entry = m_fullEntries[index];
uploader->uploadTexture(entry.texture, resourceProvider, entry.sourceRect, entry.destRect);
fullUploadCount++;
if (!(fullUploadCount % kUploadFlushPeriod))
resourceProvider->flush();
}
// Make sure there are no dangling uploads without a flush.
if (fullUploadCount % kUploadFlushPeriod)
resourceProvider->flush();
bool moreUploads = maxIndex < m_fullEntries.size();
ASSERT(m_partialEntries.size() <= count);
// We need another update batch if the number of updates remaining
// in |count| is greater than the remaining partial entries.
if ((count - (index - m_entryIndex)) < m_partialEntries.size())
moreUploads = true;
if (moreUploads) {
m_entryIndex = index;
uploader->endUploads();
return;
}
for (index = 0; index < m_partialEntries.size(); ++index) {
UpdateEntry& entry = m_partialEntries[index];
uploader->uploadTexture(entry.texture, resourceProvider, entry.sourceRect, entry.destRect);
if (!((index+1) % kUploadFlushPeriod))
resourceProvider->flush();
}
// Make sure there are no dangling partial uploads without a flush.
// Note: We don't need to use (index+1) in this case because index was
// incremented at the end of the for loop.
if (index % kUploadFlushPeriod)
resourceProvider->flush();
uploader->endUploads();
}
for (index = 0; index < m_copyEntries.size(); ++index) {
CopyEntry& copyEntry = m_copyEntries[index];
copier->copyTexture(copyEntry.sourceTexture, copyEntry.destTexture, copyEntry.size);
}
// If we've performed any texture copies, we need to insert a flush here into the compositor context
// before letting the main thread proceed as it may make draw calls to the source texture of one of
// our copy operations.
if (m_copyEntries.size())
copier->flush();
// If no entries left to process, auto-clear.
clear();
}
void CCTextureUpdater::clear()
{
m_entryIndex = 0;
m_fullEntries.clear();
m_partialEntries.clear();
m_copyEntries.clear();
}
}
#endif // USE(ACCELERATED_COMPOSITING)
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