void CCLayerTreeHost::updateLayers(LayerChromium* rootLayer, CCTextureUpdater& updater)
{
TRACE_EVENT("CCLayerTreeHost::updateLayers", this, 0);
if (!rootLayer->renderSurface())
rootLayer->createRenderSurface();
rootLayer->renderSurface()->setContentRect(IntRect(IntPoint(0, 0), deviceViewportSize()));
IntRect rootClipRect(IntPoint(), deviceViewportSize());
rootLayer->setClipRect(rootClipRect);
LayerList updateList;
updateList.append(rootLayer);
RenderSurfaceChromium* rootRenderSurface = rootLayer->renderSurface();
rootRenderSurface->clearLayerList();
{
TRACE_EVENT("CCLayerTreeHost::updateLayers::calcDrawEtc", this, 0);
WebTransformationMatrix identityMatrix;
WebTransformationMatrix deviceScaleTransform;
deviceScaleTransform.scale(m_deviceScaleFactor);
CCLayerTreeHostCommon::calculateDrawTransforms(rootLayer, rootLayer, deviceScaleTransform, identityMatrix, updateList, rootRenderSurface->layerList(), layerRendererCapabilities().maxTextureSize);
FloatRect rootScissorRect(FloatPoint(0, 0), viewportSize());
CCLayerTreeHostCommon::calculateVisibleAndScissorRects(updateList, rootScissorRect);
}
// Reset partial texture update requests.
m_partialTextureUpdateRequests = 0;
reserveTextures(updateList);
paintLayerContents(updateList, PaintVisible, updater);
if (!m_triggerIdlePaints)
return;
size_t preferredLimitBytes = m_contentsTextureManager->preferredMemoryLimitBytes();
size_t maxLimitBytes = m_contentsTextureManager->maxMemoryLimitBytes();
m_contentsTextureManager->reduceMemoryToLimit(preferredLimitBytes);
if (m_contentsTextureManager->currentMemoryUseBytes() >= preferredLimitBytes)
return;
// Idle painting should fail when we hit the preferred memory limit,
// otherwise it will always push us towards the maximum limit.
m_contentsTextureManager->setMaxMemoryLimitBytes(preferredLimitBytes);
// The second (idle) paint will be a no-op in layers where painting already occured above.
paintLayerContents(updateList, PaintIdle, updater);
m_contentsTextureManager->setMaxMemoryLimitBytes(maxLimitBytes);
for (size_t i = 0; i < updateList.size(); ++i)
updateList[i]->clearRenderSurface();
}
// This function commits the CCLayerTreeHost to an impl tree. When modifying
// this function, keep in mind that the function *runs* on the impl thread! Any
// code that is logically a main thread operation, e.g. deletion of a LayerChromium,
// should be delayed until the CCLayerTreeHost::commitComplete, which will run
// after the commit, but on the main thread.
void CCLayerTreeHost::finishCommitOnImplThread(CCLayerTreeHostImpl* hostImpl)
{
ASSERT(CCProxy::isImplThread());
hostImpl->setRootLayer(TreeSynchronizer::synchronizeTrees(rootLayer(), hostImpl->detachLayerTree(), hostImpl));
if (m_rootLayer && m_hudLayer)
hostImpl->setHudLayer(static_cast<CCHeadsUpDisplayLayerImpl*>(CCLayerTreeHostCommon::findLayerInSubtree(hostImpl->rootLayer(), m_hudLayer->id())));
else
hostImpl->setHudLayer(0);
// We may have added an animation during the tree sync. This will cause both layer tree hosts
// to visit their controllers.
if (rootLayer() && m_needsAnimateLayers)
hostImpl->setNeedsAnimateLayers();
hostImpl->setSourceFrameNumber(commitNumber());
hostImpl->setViewportSize(layoutViewportSize(), deviceViewportSize());
hostImpl->setDeviceScaleFactor(deviceScaleFactor());
hostImpl->setPageScaleFactorAndLimits(m_pageScaleFactor, m_minPageScaleFactor, m_maxPageScaleFactor);
hostImpl->setBackgroundColor(m_backgroundColor);
hostImpl->setHasTransparentBackground(m_hasTransparentBackground);
m_commitNumber++;
}
void CCLayerTreeHost::paintLayerContents(const LayerList& renderSurfaceLayerList, PaintType paintType, CCTextureUpdater& updater)
{
// Use FrontToBack to allow for testing occlusion and performing culling during the tree walk.
typedef CCLayerIterator<LayerChromium, Vector<RefPtr<LayerChromium> >, RenderSurfaceChromium, CCLayerIteratorActions::FrontToBack> CCLayerIteratorType;
bool recordMetricsForFrame = true; // FIXME: In the future, disable this when about:tracing is off.
CCOcclusionTracker occlusionTracker(IntRect(IntPoint(), deviceViewportSize()), recordMetricsForFrame);
occlusionTracker.setMinimumTrackingSize(CCOcclusionTracker::preferredMinimumTrackingSize());
CCLayerIteratorType end = CCLayerIteratorType::end(&renderSurfaceLayerList);
for (CCLayerIteratorType it = CCLayerIteratorType::begin(&renderSurfaceLayerList); it != end; ++it) {
occlusionTracker.enterLayer(it);
if (it.representsTargetRenderSurface()) {
ASSERT(it->renderSurface()->drawOpacity() || it->renderSurface()->drawOpacityIsAnimating());
paintMasksForRenderSurface(*it, paintType, updater);
} else if (it.representsItself()) {
ASSERT(!it->bounds().isEmpty());
update(*it, paintType, updater, &occlusionTracker);
}
occlusionTracker.leaveLayer(it);
}
occlusionTracker.overdrawMetrics().recordMetrics(this);
}
void CCLayerTreeHost::initializeLayerRenderer()
{
TRACE_EVENT("CCLayerTreeHost::initializeLayerRenderer", this, 0);
if (!m_proxy->initializeLayerRenderer()) {
// Uh oh, better tell the client that we can't do anything with this context.
m_client->didRecreateContext(false);
return;
}
// Update m_settings based on capabilities that we got back from the renderer.
m_settings.acceleratePainting = m_proxy->layerRendererCapabilities().usingAcceleratedPainting;
// Update m_settings based on partial update capability.
m_settings.maxPartialTextureUpdates = min(m_settings.maxPartialTextureUpdates, m_proxy->maxPartialTextureUpdates());
m_contentsTextureManager = TextureManager::create(0, 0, m_proxy->layerRendererCapabilities().maxTextureSize);
// FIXME: This is the same as setContentsMemoryAllocationLimitBytes, but
// we're in the middle of a commit here and don't want to force another.
m_memoryAllocationBytes = TextureManager::highLimitBytes(deviceViewportSize());
m_memoryAllocationIsForDisplay = true;
m_layerRendererInitialized = true;
m_settings.defaultTileSize = IntSize(min(m_settings.defaultTileSize.width(), m_proxy->layerRendererCapabilities().maxTextureSize),
min(m_settings.defaultTileSize.height(), m_proxy->layerRendererCapabilities().maxTextureSize));
m_settings.maxUntiledLayerSize = IntSize(min(m_settings.maxUntiledLayerSize.width(), m_proxy->layerRendererCapabilities().maxTextureSize),
min(m_settings.maxUntiledLayerSize.height(), m_proxy->layerRendererCapabilities().maxTextureSize));
}
void CCLayerTreeHost::updateLayers(LayerChromium* rootLayer, CCTextureUpdater& updater)
{
TRACE_EVENT0("cc", "CCLayerTreeHost::updateLayers");
if (!rootLayer->renderSurface())
rootLayer->createRenderSurface();
rootLayer->renderSurface()->setContentRect(IntRect(IntPoint(0, 0), deviceViewportSize()));
IntRect rootClipRect(IntPoint(), deviceViewportSize());
rootLayer->setClipRect(rootClipRect);
LayerList updateList;
updateList.append(rootLayer);
RenderSurfaceChromium* rootRenderSurface = rootLayer->renderSurface();
rootRenderSurface->clearLayerList();
{
TRACE_EVENT0("cc", "CCLayerTreeHost::updateLayers::calcDrawEtc");
WebTransformationMatrix identityMatrix;
WebTransformationMatrix deviceScaleTransform;
deviceScaleTransform.scale(m_deviceScaleFactor);
CCLayerTreeHostCommon::calculateDrawTransforms(rootLayer, rootLayer, deviceScaleTransform, identityMatrix, updateList, rootRenderSurface->layerList(), layerRendererCapabilities().maxTextureSize);
FloatRect rootScissorRect(FloatPoint(0, 0), viewportSize());
CCLayerTreeHostCommon::calculateVisibleAndScissorRects(updateList, rootScissorRect);
}
// Reset partial texture update requests.
m_partialTextureUpdateRequests = 0;
prioritizeTextures(updateList);
bool needMoreUpdates = paintLayerContents(updateList, updater);
if (m_triggerIdleUpdates && needMoreUpdates)
setNeedsCommit();
for (size_t i = 0; i < updateList.size(); ++i)
updateList[i]->clearRenderSurface();
}
void CCLayerTreeHost::updateLayers(LayerChromium* rootLayer, CCTextureUpdateQueue& queue)
{
TRACE_EVENT0("cc", "CCLayerTreeHost::updateLayers");
LayerList updateList;
{
TRACE_EVENT0("cc", "CCLayerTreeHost::updateLayers::calcDrawEtc");
CCLayerTreeHostCommon::calculateDrawTransforms(rootLayer, deviceViewportSize(), m_deviceScaleFactor, rendererCapabilities().maxTextureSize, updateList);
CCLayerTreeHostCommon::calculateVisibleRects(updateList);
}
// Reset partial texture update requests.
m_partialTextureUpdateRequests = 0;
bool needMoreUpdates = paintLayerContents(updateList, queue);
if (m_triggerIdleUpdates && needMoreUpdates)
setNeedsCommit();
for (size_t i = 0; i < updateList.size(); ++i)
updateList[i]->clearRenderSurface();
}
