cc/CCLayerTreeHostImpl.cpp - Issue 11122003: [cc] Rename all cc/ filenames to Chromium style

Unified Diff: cc/CCLayerTreeHostImpl.cpp

Issue 11122003: [cc] Rename all cc/ filenames to Chromium style (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src

Patch Set: Created 8 years, 2 months ago

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Index: cc/CCLayerTreeHostImpl.cpp

diff --git a/cc/CCLayerTreeHostImpl.cpp b/cc/CCLayerTreeHostImpl.cpp

deleted file mode 100644

index bc50697ad25a5f7b5d0e779fd95870c62ba3aba1..0000000000000000000000000000000000000000

--- a/cc/CCLayerTreeHostImpl.cpp

+++ /dev/null

@@ -1,1462 +0,0 @@

-// Use of this source code is governed by a BSD-style license that can be

-// found in the LICENSE file.

-#include "config.h"

-#include "CCLayerTreeHostImpl.h"

-#include "base/basictypes.h"

-#include "CCAppendQuadsData.h"

-#include "CCDamageTracker.h"

-#include "CCDebugRectHistory.h"

-#include "CCDelayBasedTimeSource.h"

-#include "CCFontAtlas.h"

-#include "CCFrameRateCounter.h"

-#include "CCHeadsUpDisplayLayerImpl.h"

-#include "CCLayerIterator.h"

-#include "CCLayerTreeHost.h"

-#include "CCLayerTreeHostCommon.h"

-#include "CCMathUtil.h"

-#include "CCOverdrawMetrics.h"

-#include "CCPageScaleAnimation.h"

-#include "CCPrioritizedTextureManager.h"

-#include "CCRenderPassDrawQuad.h"

-#include "CCRendererGL.h"

-#include "CCRendererSoftware.h"

-#include "CCRenderingStats.h"

-#include "CCScrollbarAnimationController.h"

-#include "CCScrollbarLayerImpl.h"

-#include "CCSettings.h"

-#include "CCSingleThreadProxy.h"

-#include "TextureUploader.h"

-#include "TraceEvent.h"

-#include <wtf/CurrentTime.h>

-#include <algorithm>

-using WebKit::WebTransformationMatrix;

-namespace {

-void didVisibilityChange(cc::CCLayerTreeHostImpl* id, bool visible)

- if (visible) {

- TRACE_EVENT_ASYNC_BEGIN1("webkit", "CCLayerTreeHostImpl::setVisible", id, "CCLayerTreeHostImpl", id);

- return;

- }

- TRACE_EVENT_ASYNC_END0("webkit", "CCLayerTreeHostImpl::setVisible", id);

-} // namespace

-namespace cc {

-CCPinchZoomViewport::CCPinchZoomViewport()

- : m_pageScaleFactor(1)

- , m_pageScaleDelta(1)

- , m_sentPageScaleDelta(1)

- , m_minPageScaleFactor(0)

- , m_maxPageScaleFactor(0)

-float CCPinchZoomViewport::totalPageScaleFactor() const

- return m_pageScaleFactor * m_pageScaleDelta;

-void CCPinchZoomViewport::setPageScaleDelta(float delta)

- // Clamp to the current min/max limits.

- float totalPageScaleFactor = m_pageScaleFactor * delta;

- if (m_minPageScaleFactor && totalPageScaleFactor < m_minPageScaleFactor)

- delta = m_minPageScaleFactor / m_pageScaleFactor;

- else if (m_maxPageScaleFactor && totalPageScaleFactor > m_maxPageScaleFactor)

- delta = m_maxPageScaleFactor / m_pageScaleFactor;

- if (delta == m_pageScaleDelta)

- return;

- m_pageScaleDelta = delta;

-bool CCPinchZoomViewport::setPageScaleFactorAndLimits(float pageScaleFactor, float minPageScaleFactor, float maxPageScaleFactor)

- ASSERT(pageScaleFactor);

- if (m_sentPageScaleDelta == 1 && pageScaleFactor == m_pageScaleFactor && minPageScaleFactor == m_minPageScaleFactor && maxPageScaleFactor == m_maxPageScaleFactor)

- return false;

- m_minPageScaleFactor = minPageScaleFactor;

- m_maxPageScaleFactor = maxPageScaleFactor;

- m_pageScaleFactor = pageScaleFactor;

- return true;

-FloatRect CCPinchZoomViewport::bounds() const

- FloatSize scaledViewportSize = m_layoutViewportSize;

- scaledViewportSize.scale(1 / totalPageScaleFactor());

- FloatRect bounds(FloatPoint(0, 0), scaledViewportSize);

- bounds.setLocation(m_pinchViewportScrollDelta);

- return bounds;

-FloatSize CCPinchZoomViewport::applyScroll(FloatSize& delta)

- FloatSize overflow;

- FloatRect pinchedBounds = bounds();

- pinchedBounds.move(delta);

- if (pinchedBounds.x() < 0) {

- overflow.setWidth(pinchedBounds.x());

- pinchedBounds.setX(0);

- }

- if (pinchedBounds.y() < 0) {

- overflow.setHeight(pinchedBounds.y());

- pinchedBounds.setY(0);

- }

- if (pinchedBounds.maxX() > m_layoutViewportSize.width()) {

- overflow.setWidth(

- pinchedBounds.maxX() - m_layoutViewportSize.width());

- pinchedBounds.move(

- m_layoutViewportSize.width() - pinchedBounds.maxX(), 0);

- }

- if (pinchedBounds.maxY() > m_layoutViewportSize.height()) {

- overflow.setHeight(

- pinchedBounds.maxY() - m_layoutViewportSize.height());

- pinchedBounds.move(

- 0, m_layoutViewportSize.height() - pinchedBounds.maxY());

- }

- m_pinchViewportScrollDelta = pinchedBounds.location();

- return overflow;

-WebTransformationMatrix CCPinchZoomViewport::implTransform() const

- WebTransformationMatrix transform;

- transform.scale(m_pageScaleDelta);

- // If the pinch state is applied in the impl, then push it to the

- // impl transform, otherwise the scale is handled by WebCore.

- if (CCSettings::pageScalePinchZoomEnabled()) {

- transform.scale(m_pageScaleFactor);

- transform.translate(-m_pinchViewportScrollDelta.x(),

- -m_pinchViewportScrollDelta.y());

- }

- return transform;

-class CCLayerTreeHostImplTimeSourceAdapter : public CCTimeSourceClient {

-public:

- static PassOwnPtr<CCLayerTreeHostImplTimeSourceAdapter> create(CCLayerTreeHostImpl* layerTreeHostImpl, PassRefPtr<CCDelayBasedTimeSource> timeSource)

- {

- return adoptPtr(new CCLayerTreeHostImplTimeSourceAdapter(layerTreeHostImpl, timeSource));

- }

- virtual ~CCLayerTreeHostImplTimeSourceAdapter()

- {

- m_timeSource->setClient(0);

- m_timeSource->setActive(false);

- }

- virtual void onTimerTick() OVERRIDE

- {

- // FIXME: We require that animate be called on the impl thread. This

- // avoids asserts in single threaded mode. Ideally background ticking

- // would be handled by the proxy/scheduler and this could be removed.

- DebugScopedSetImplThread impl;

- m_layerTreeHostImpl->animate(monotonicallyIncreasingTime(), currentTime());

- }

- void setActive(bool active)

- {

- if (active != m_timeSource->active())

- m_timeSource->setActive(active);

- }

-private:

- CCLayerTreeHostImplTimeSourceAdapter(CCLayerTreeHostImpl* layerTreeHostImpl, PassRefPtr<CCDelayBasedTimeSource> timeSource)

- : m_layerTreeHostImpl(layerTreeHostImpl)

- , m_timeSource(timeSource)

- {

- m_timeSource->setClient(this);

- }

- CCLayerTreeHostImpl* m_layerTreeHostImpl;

- RefPtr<CCDelayBasedTimeSource> m_timeSource;

- DISALLOW_COPY_AND_ASSIGN(CCLayerTreeHostImplTimeSourceAdapter);

-};

-CCLayerTreeHostImpl::FrameData::FrameData()

-CCLayerTreeHostImpl::FrameData::~FrameData()

-scoped_ptr<CCLayerTreeHostImpl> CCLayerTreeHostImpl::create(const CCLayerTreeSettings& settings, CCLayerTreeHostImplClient* client)

- return make_scoped_ptr(new CCLayerTreeHostImpl(settings, client));

-CCLayerTreeHostImpl::CCLayerTreeHostImpl(const CCLayerTreeSettings& settings, CCLayerTreeHostImplClient* client)

- : m_client(client)

- , m_sourceFrameNumber(-1)

- , m_rootScrollLayerImpl(0)

- , m_currentlyScrollingLayerImpl(0)

- , m_hudLayerImpl(0)

- , m_scrollingLayerIdFromPreviousTree(-1)

- , m_scrollDeltaIsInScreenSpace(false)

- , m_settings(settings)

- , m_deviceScaleFactor(1)

- , m_visible(true)

- , m_contentsTexturesPurged(false)

- , m_memoryAllocationLimitBytes(CCPrioritizedTextureManager::defaultMemoryAllocationLimit())

- , m_backgroundColor(0)

- , m_hasTransparentBackground(false)

- , m_needsAnimateLayers(false)

- , m_pinchGestureActive(false)

- , m_fpsCounter(CCFrameRateCounter::create())

- , m_debugRectHistory(CCDebugRectHistory::create())

- , m_numImplThreadScrolls(0)

- , m_numMainThreadScrolls(0)

- ASSERT(CCProxy::isImplThread());

- didVisibilityChange(this, m_visible);

-CCLayerTreeHostImpl::~CCLayerTreeHostImpl()

- ASSERT(CCProxy::isImplThread());

- TRACE_EVENT0("cc", "CCLayerTreeHostImpl::~CCLayerTreeHostImpl()");

- if (m_rootLayerImpl)

- clearRenderSurfaces();

-void CCLayerTreeHostImpl::beginCommit()

-void CCLayerTreeHostImpl::commitComplete()

- TRACE_EVENT0("cc", "CCLayerTreeHostImpl::commitComplete");

- // Recompute max scroll position; must be after layer content bounds are

- // updated.

- updateMaxScrollPosition();

-bool CCLayerTreeHostImpl::canDraw()

- // Note: If you are changing this function or any other function that might

- // affect the result of canDraw, make sure to call m_client->onCanDrawStateChanged

- // in the proper places and update the notifyIfCanDrawChanged test.

- if (!m_rootLayerImpl) {

- TRACE_EVENT_INSTANT0("cc", "CCLayerTreeHostImpl::canDraw no root layer");

- return false;

- }

- if (deviceViewportSize().isEmpty()) {

- TRACE_EVENT_INSTANT0("cc", "CCLayerTreeHostImpl::canDraw empty viewport");

- return false;

- }

- if (!m_renderer) {

- TRACE_EVENT_INSTANT0("cc", "CCLayerTreeHostImpl::canDraw no renderer");

- return false;

- }

- if (m_contentsTexturesPurged) {

- TRACE_EVENT_INSTANT0("cc", "CCLayerTreeHostImpl::canDraw contents textures purged");

- return false;

- }

- return true;

-CCGraphicsContext* CCLayerTreeHostImpl::context() const

- return m_context.get();

-void CCLayerTreeHostImpl::animate(double monotonicTime, double wallClockTime)

- animatePageScale(monotonicTime);

- animateLayers(monotonicTime, wallClockTime);

- animateScrollbars(monotonicTime);

-void CCLayerTreeHostImpl::startPageScaleAnimation(const IntSize& targetPosition, bool anchorPoint, float pageScale, double startTime, double duration)

- if (!m_rootScrollLayerImpl)

- return;

- IntSize scrollTotal = flooredIntSize(m_rootScrollLayerImpl->scrollPosition() + m_rootScrollLayerImpl->scrollDelta());

- scrollTotal.scale(m_pinchZoomViewport.pageScaleDelta());

- float scaleTotal = m_pinchZoomViewport.totalPageScaleFactor();

- IntSize scaledContentSize = contentSize();

- scaledContentSize.scale(m_pinchZoomViewport.pageScaleDelta());

- m_pageScaleAnimation = CCPageScaleAnimation::create(scrollTotal, scaleTotal, m_deviceViewportSize, scaledContentSize, startTime);

- if (anchorPoint) {

- IntSize windowAnchor(targetPosition);

- windowAnchor.scale(scaleTotal / pageScale);

- windowAnchor -= scrollTotal;

- m_pageScaleAnimation->zoomWithAnchor(windowAnchor, pageScale, duration);

- } else

- m_pageScaleAnimation->zoomTo(targetPosition, pageScale, duration);

- m_client->setNeedsRedrawOnImplThread();

- m_client->setNeedsCommitOnImplThread();

-void CCLayerTreeHostImpl::scheduleAnimation()

- m_client->setNeedsRedrawOnImplThread();

-void CCLayerTreeHostImpl::trackDamageForAllSurfaces(CCLayerImpl* rootDrawLayer, const CCLayerList& renderSurfaceLayerList)

- // For now, we use damage tracking to compute a global scissor. To do this, we must

- // compute all damage tracking before drawing anything, so that we know the root

- // damage rect. The root damage rect is then used to scissor each surface.

- for (int surfaceIndex = renderSurfaceLayerList.size() - 1; surfaceIndex >= 0 ; --surfaceIndex) {

- CCLayerImpl* renderSurfaceLayer = renderSurfaceLayerList[surfaceIndex];

- CCRenderSurface* renderSurface = renderSurfaceLayer->renderSurface();

- ASSERT(renderSurface);

- renderSurface->damageTracker()->updateDamageTrackingState(renderSurface->layerList(), renderSurfaceLayer->id(), renderSurface->surfacePropertyChangedOnlyFromDescendant(), renderSurface->contentRect(), renderSurfaceLayer->maskLayer(), renderSurfaceLayer->filters());

- }

-void CCLayerTreeHostImpl::updateRootScrollLayerImplTransform()

- if (m_rootScrollLayerImpl) {

- m_rootScrollLayerImpl->setImplTransform(implTransform());

- }

-void CCLayerTreeHostImpl::calculateRenderSurfaceLayerList(CCLayerList& renderSurfaceLayerList)

- ASSERT(renderSurfaceLayerList.empty());

- ASSERT(m_rootLayerImpl);

- ASSERT(m_renderer); // For maxTextureSize.

- {

- updateRootScrollLayerImplTransform();

- TRACE_EVENT0("cc", "CCLayerTreeHostImpl::calcDrawEtc");

- CCLayerTreeHostCommon::calculateDrawTransforms(m_rootLayerImpl.get(), deviceViewportSize(), m_deviceScaleFactor, &m_layerSorter, rendererCapabilities().maxTextureSize, renderSurfaceLayerList);

- trackDamageForAllSurfaces(m_rootLayerImpl.get(), renderSurfaceLayerList);

- }

-void CCLayerTreeHostImpl::FrameData::appendRenderPass(scoped_ptr<CCRenderPass> renderPass)

- CCRenderPass* pass = renderPass.get();

- renderPasses.push_back(pass);

- renderPassesById.set(pass->id(), renderPass.Pass());

-bool CCLayerTreeHostImpl::calculateRenderPasses(FrameData& frame)

- ASSERT(frame.renderPasses.empty());

- calculateRenderSurfaceLayerList(*frame.renderSurfaceLayerList);

- TRACE_EVENT1("cc", "CCLayerTreeHostImpl::calculateRenderPasses", "renderSurfaceLayerList.size()", static_cast<long long unsigned>(frame.renderSurfaceLayerList->size()));

- // Create the render passes in dependency order.

- for (int surfaceIndex = frame.renderSurfaceLayerList->size() - 1; surfaceIndex >= 0 ; --surfaceIndex) {

- CCLayerImpl* renderSurfaceLayer = (*frame.renderSurfaceLayerList)[surfaceIndex];

- renderSurfaceLayer->renderSurface()->appendRenderPasses(frame);

- }

- bool recordMetricsForFrame = true; // FIXME: In the future, disable this when about:tracing is off.

- CCOcclusionTrackerImpl occlusionTracker(m_rootLayerImpl->renderSurface()->contentRect(), recordMetricsForFrame);

- occlusionTracker.setMinimumTrackingSize(m_settings.minimumOcclusionTrackingSize);

- if (settings().showOccludingRects)

- occlusionTracker.setOccludingScreenSpaceRectsContainer(&frame.occludingScreenSpaceRects);

- // Add quads to the Render passes in FrontToBack order to allow for testing occlusion and performing culling during the tree walk.

- typedef CCLayerIterator<CCLayerImpl, std::vector<CCLayerImpl*>, CCRenderSurface, CCLayerIteratorActions::FrontToBack> CCLayerIteratorType;

- // Typically when we are missing a texture and use a checkerboard quad, we still draw the frame. However when the layer being

- // checkerboarded is moving due to an impl-animation, we drop the frame to avoid flashing due to the texture suddenly appearing

- // in the future.

- bool drawFrame = true;

- CCLayerIteratorType end = CCLayerIteratorType::end(frame.renderSurfaceLayerList);

- for (CCLayerIteratorType it = CCLayerIteratorType::begin(frame.renderSurfaceLayerList); it != end; ++it) {

- CCRenderPass::Id targetRenderPassId = it.targetRenderSurfaceLayer()->renderSurface()->renderPassId();

- CCRenderPass* targetRenderPass = frame.renderPassesById.get(targetRenderPassId);

- occlusionTracker.enterLayer(it);

- CCAppendQuadsData appendQuadsData(targetRenderPass->id());

- if (it.representsContributingRenderSurface()) {

- CCRenderPass::Id contributingRenderPassId = it->renderSurface()->renderPassId();

- CCRenderPass* contributingRenderPass = frame.renderPassesById.get(contributingRenderPassId);

- targetRenderPass->appendQuadsForRenderSurfaceLayer(*it, contributingRenderPass, &occlusionTracker, appendQuadsData);

- } else if (it.representsItself() && !it->visibleContentRect().isEmpty()) {

- bool hasOcclusionFromOutsideTargetSurface;

- if (occlusionTracker.occluded(*it, it->visibleContentRect(), &hasOcclusionFromOutsideTargetSurface))

- appendQuadsData.hadOcclusionFromOutsideTargetSurface |= hasOcclusionFromOutsideTargetSurface;

- else {

- it->willDraw(m_resourceProvider.get());

- frame.willDrawLayers.push_back(*it);

- if (it->hasContributingDelegatedRenderPasses()) {

- CCRenderPass::Id contributingRenderPassId = it->firstContributingRenderPassId();

- while (frame.renderPassesById.contains(contributingRenderPassId)) {

- CCRenderPass* renderPass = frame.renderPassesById.get(contributingRenderPassId);

- CCAppendQuadsData appendQuadsData(renderPass->id());

- renderPass->appendQuadsForLayer(*it, &occlusionTracker, appendQuadsData);

- contributingRenderPassId = it->nextContributingRenderPassId(contributingRenderPassId);

- }

- targetRenderPass->appendQuadsForLayer(*it, &occlusionTracker, appendQuadsData);

- }

- if (appendQuadsData.hadOcclusionFromOutsideTargetSurface)

- targetRenderPass->setHasOcclusionFromOutsideTargetSurface(true);

- if (appendQuadsData.hadMissingTiles) {

- bool layerHasAnimatingTransform = it->screenSpaceTransformIsAnimating() || it->drawTransformIsAnimating();

- if (layerHasAnimatingTransform || CCSettings::jankInsteadOfCheckerboard())

- drawFrame = false;

- }

- occlusionTracker.leaveLayer(it);

- }

-#if !ASSERT_DISABLED

- for (size_t i = 0; i < frame.renderPasses.size(); ++i) {

- for (size_t j = 0; j < frame.renderPasses[i]->quadList().size(); ++j)

- ASSERT(frame.renderPasses[i]->quadList()[j]->sharedQuadStateId() >= 0);

- ASSERT(frame.renderPassesById.contains(frame.renderPasses[i]->id()));

- }

-#endif

- if (!m_hasTransparentBackground) {

- frame.renderPasses.back()->setHasTransparentBackground(false);

- frame.renderPasses.back()->appendQuadsToFillScreen(m_rootLayerImpl.get(), m_backgroundColor, occlusionTracker);

- }

- if (drawFrame)

- occlusionTracker.overdrawMetrics().recordMetrics(this);

- removeRenderPasses(CullRenderPassesWithNoQuads(), frame);

- m_renderer->decideRenderPassAllocationsForFrame(frame.renderPasses);

- removeRenderPasses(CullRenderPassesWithCachedTextures(*m_renderer), frame);

- return drawFrame;

-void CCLayerTreeHostImpl::animateLayersRecursive(CCLayerImpl* current, double monotonicTime, double wallClockTime, CCAnimationEventsVector* events, bool& didAnimate, bool& needsAnimateLayers)

- bool subtreeNeedsAnimateLayers = false;

- CCLayerAnimationController* currentController = current->layerAnimationController();

- bool hadActiveAnimation = currentController->hasActiveAnimation();

- currentController->animate(monotonicTime, events);

- bool startedAnimation = events->size() > 0;

- // We animated if we either ticked a running animation, or started a new animation.

- if (hadActiveAnimation || startedAnimation)

- didAnimate = true;

- // If the current controller still has an active animation, we must continue animating layers.

- if (currentController->hasActiveAnimation())

- subtreeNeedsAnimateLayers = true;

- for (size_t i = 0; i < current->children().size(); ++i) {

- bool childNeedsAnimateLayers = false;

- animateLayersRecursive(current->children()[i], monotonicTime, wallClockTime, events, didAnimate, childNeedsAnimateLayers);

- if (childNeedsAnimateLayers)

- subtreeNeedsAnimateLayers = true;

- }

- needsAnimateLayers = subtreeNeedsAnimateLayers;

-void CCLayerTreeHostImpl::setBackgroundTickingEnabled(bool enabled)

- // Lazily create the timeSource adapter so that we can vary the interval for testing.

- if (!m_timeSourceClientAdapter)

- m_timeSourceClientAdapter = CCLayerTreeHostImplTimeSourceAdapter::create(this, CCDelayBasedTimeSource::create(lowFrequencyAnimationInterval(), CCProxy::currentThread()));

- m_timeSourceClientAdapter->setActive(enabled);

-IntSize CCLayerTreeHostImpl::contentSize() const

- // TODO(aelias): Hardcoding the first child here is weird. Think of

- // a cleaner way to get the contentBounds on the Impl side.

- if (!m_rootScrollLayerImpl || m_rootScrollLayerImpl->children().isEmpty())

- return IntSize();

- return m_rootScrollLayerImpl->children()[0]->contentBounds();

-static inline CCRenderPass* findRenderPassById(CCRenderPass::Id renderPassId, const CCLayerTreeHostImpl::FrameData& frame)

- CCRenderPassIdHashMap::const_iterator it = frame.renderPassesById.find(renderPassId);

- ASSERT(it != frame.renderPassesById.end());

- return it->second;

-static void removeRenderPassesRecursive(CCRenderPass::Id removeRenderPassId, CCLayerTreeHostImpl::FrameData& frame)

- CCRenderPass* removeRenderPass = findRenderPassById(removeRenderPassId, frame);

- CCRenderPassList& renderPasses = frame.renderPasses;

- CCRenderPassList::iterator toRemove = std::find(renderPasses.begin(), renderPasses.end(), removeRenderPass);

- // The pass was already removed by another quad - probably the original, and we are the replica.

- if (toRemove == renderPasses.end())

- return;

- const CCRenderPass* removedPass = *toRemove;

- frame.renderPasses.erase(toRemove);

- // Now follow up for all RenderPass quads and remove their RenderPasses recursively.

- const CCQuadList& quadList = removedPass->quadList();

- CCQuadList::constBackToFrontIterator quadListIterator = quadList.backToFrontBegin();

- for (; quadListIterator != quadList.backToFrontEnd(); ++quadListIterator) {

- CCDrawQuad* currentQuad = (*quadListIterator);

- if (currentQuad->material() != CCDrawQuad::RenderPass)

- continue;

- CCRenderPass::Id nextRemoveRenderPassId = CCRenderPassDrawQuad::materialCast(currentQuad)->renderPassId();

- removeRenderPassesRecursive(nextRemoveRenderPassId, frame);

- }

-bool CCLayerTreeHostImpl::CullRenderPassesWithCachedTextures::shouldRemoveRenderPass(const CCRenderPassDrawQuad& quad, const FrameData&) const

- return quad.contentsChangedSinceLastFrame().isEmpty() && m_renderer.haveCachedResourcesForRenderPassId(quad.renderPassId());

-bool CCLayerTreeHostImpl::CullRenderPassesWithNoQuads::shouldRemoveRenderPass(const CCRenderPassDrawQuad& quad, const FrameData& frame) const

- const CCRenderPass* renderPass = findRenderPassById(quad.renderPassId(), frame);

- const CCRenderPassList& renderPasses = frame.renderPasses;

- CCRenderPassList::const_iterator foundPass = std::find(renderPasses.begin(), renderPasses.end(), renderPass);

- bool renderPassAlreadyRemoved = foundPass == renderPasses.end();

- if (renderPassAlreadyRemoved)

- return false;

- // If any quad or RenderPass draws into this RenderPass, then keep it.

- const CCQuadList& quadList = (*foundPass)->quadList();

- for (CCQuadList::constBackToFrontIterator quadListIterator = quadList.backToFrontBegin(); quadListIterator != quadList.backToFrontEnd(); ++quadListIterator) {

- CCDrawQuad* currentQuad = *quadListIterator;

- if (currentQuad->material() != CCDrawQuad::RenderPass)

- return false;

- const CCRenderPass* contributingPass = findRenderPassById(CCRenderPassDrawQuad::materialCast(currentQuad)->renderPassId(), frame);

- CCRenderPassList::const_iterator foundContributingPass = std::find(renderPasses.begin(), renderPasses.end(), contributingPass);

- if (foundContributingPass != renderPasses.end())

- return false;

- }

- return true;

-// Defined for linking tests.

-template void CCLayerTreeHostImpl::removeRenderPasses<CCLayerTreeHostImpl::CullRenderPassesWithCachedTextures>(CullRenderPassesWithCachedTextures, FrameData&);

-template void CCLayerTreeHostImpl::removeRenderPasses<CCLayerTreeHostImpl::CullRenderPassesWithNoQuads>(CullRenderPassesWithNoQuads, FrameData&);

-// static

-template<typename RenderPassCuller>

-void CCLayerTreeHostImpl::removeRenderPasses(RenderPassCuller culler, FrameData& frame)

- for (size_t it = culler.renderPassListBegin(frame.renderPasses); it != culler.renderPassListEnd(frame.renderPasses); it = culler.renderPassListNext(it)) {

- const CCRenderPass* currentPass = frame.renderPasses[it];

- const CCQuadList& quadList = currentPass->quadList();

- CCQuadList::constBackToFrontIterator quadListIterator = quadList.backToFrontBegin();

- for (; quadListIterator != quadList.backToFrontEnd(); ++quadListIterator) {

- CCDrawQuad* currentQuad = *quadListIterator;

- if (currentQuad->material() != CCDrawQuad::RenderPass)

- continue;

- CCRenderPassDrawQuad* renderPassQuad = static_cast<CCRenderPassDrawQuad*>(currentQuad);

- if (!culler.shouldRemoveRenderPass(*renderPassQuad, frame))

- continue;

- // We are changing the vector in the middle of iteration. Because we

- // delete render passes that draw into the current pass, we are

- // guaranteed that any data from the iterator to the end will not

- // change. So, capture the iterator position from the end of the

- // list, and restore it after the change.

- int positionFromEnd = frame.renderPasses.size() - it;

- removeRenderPassesRecursive(renderPassQuad->renderPassId(), frame);

- it = frame.renderPasses.size() - positionFromEnd;

- ASSERT(it >= 0);

- }

-bool CCLayerTreeHostImpl::prepareToDraw(FrameData& frame)

- TRACE_EVENT0("cc", "CCLayerTreeHostImpl::prepareToDraw");

- ASSERT(canDraw());

- frame.renderSurfaceLayerList = &m_renderSurfaceLayerList;

- frame.renderPasses.clear();

- frame.renderPassesById.clear();

- frame.renderSurfaceLayerList->clear();

- frame.willDrawLayers.clear();

- if (!calculateRenderPasses(frame))

- return false;

- // If we return true, then we expect drawLayers() to be called before this function is called again.

- return true;

-void CCLayerTreeHostImpl::releaseContentsTextures()

- if (m_contentsTexturesPurged)

- return;

- m_client->releaseContentsTexturesOnImplThread();

- setContentsTexturesPurged();

- m_client->setNeedsCommitOnImplThread();

- m_client->onCanDrawStateChanged(canDraw());

-void CCLayerTreeHostImpl::setMemoryAllocationLimitBytes(size_t bytes)

- if (m_memoryAllocationLimitBytes == bytes)

- return;

- m_memoryAllocationLimitBytes = bytes;

- ASSERT(bytes);

- m_client->setNeedsCommitOnImplThread();

-void CCLayerTreeHostImpl::onVSyncParametersChanged(double monotonicTimebase, double intervalInSeconds)

- m_client->onVSyncParametersChanged(monotonicTimebase, intervalInSeconds);

-void CCLayerTreeHostImpl::drawLayers(const FrameData& frame)

- TRACE_EVENT0("cc", "CCLayerTreeHostImpl::drawLayers");

- ASSERT(canDraw());

- ASSERT(!frame.renderPasses.empty());

- // FIXME: use the frame begin time from the overall compositor scheduler.

- // This value is currently inaccessible because it is up in Chromium's

- // RenderWidget.

- m_fpsCounter->markBeginningOfFrame(currentTime());

- if (m_settings.showDebugRects())

- m_debugRectHistory->saveDebugRectsForCurrentFrame(m_rootLayerImpl.get(), *frame.renderSurfaceLayerList, frame.occludingScreenSpaceRects, settings());

- // Because the contents of the HUD depend on everything else in the frame, the contents

- // of its texture are updated as the last thing before the frame is drawn.

- if (m_hudLayerImpl)

- m_hudLayerImpl->updateHudTexture(m_resourceProvider.get());

- m_renderer->drawFrame(frame.renderPasses, frame.renderPassesById);

- // Once a RenderPass has been drawn, its damage should be cleared in

- // case the RenderPass will be reused next frame.

- for (unsigned int i = 0; i < frame.renderPasses.size(); i++)

- frame.renderPasses[i]->setDamageRect(FloatRect());

- // The next frame should start by assuming nothing has changed, and changes are noted as they occur.

- for (unsigned int i = 0; i < frame.renderSurfaceLayerList->size(); i++)

- (*frame.renderSurfaceLayerList)[i]->renderSurface()->damageTracker()->didDrawDamagedArea();

- m_rootLayerImpl->resetAllChangeTrackingForSubtree();

-void CCLayerTreeHostImpl::didDrawAllLayers(const FrameData& frame)

- for (size_t i = 0; i < frame.willDrawLayers.size(); ++i)

- frame.willDrawLayers[i]->didDraw(m_resourceProvider.get());

- // Once all layers have been drawn, pending texture uploads should no

- // longer block future uploads.

- m_resourceProvider->textureUploader()->markPendingUploadsAsNonBlocking();

-void CCLayerTreeHostImpl::finishAllRendering()

- if (m_renderer)

- m_renderer->finish();

-bool CCLayerTreeHostImpl::isContextLost()

- return m_renderer && m_renderer->isContextLost();

-const RendererCapabilities& CCLayerTreeHostImpl::rendererCapabilities() const

- return m_renderer->capabilities();

-bool CCLayerTreeHostImpl::swapBuffers()

- ASSERT(m_renderer);

- m_fpsCounter->markEndOfFrame();

- return m_renderer->swapBuffers();

-const IntSize& CCLayerTreeHostImpl::deviceViewportSize() const

- return m_deviceViewportSize;

-const CCLayerTreeSettings& CCLayerTreeHostImpl::settings() const

- return m_settings;

-void CCLayerTreeHostImpl::didLoseContext()

- m_client->didLoseContextOnImplThread();

-void CCLayerTreeHostImpl::onSwapBuffersComplete()

- m_client->onSwapBuffersCompleteOnImplThread();

-void CCLayerTreeHostImpl::readback(void* pixels, const IntRect& rect)

- ASSERT(m_renderer);

- m_renderer->getFramebufferPixels(pixels, rect);

-static CCLayerImpl* findRootScrollLayer(CCLayerImpl* layer)

- if (!layer)

- return 0;

- if (layer->scrollable())

- return layer;

- for (size_t i = 0; i < layer->children().size(); ++i) {

- CCLayerImpl* found = findRootScrollLayer(layer->children()[i]);

- if (found)

- return found;

- }

- return 0;

-// Content layers can be either directly scrollable or contained in an outer

-// scrolling layer which applies the scroll transform. Given a content layer,

-// this function returns the associated scroll layer if any.

-static CCLayerImpl* findScrollLayerForContentLayer(CCLayerImpl* layerImpl)

- if (!layerImpl)

- return 0;

- if (layerImpl->scrollable())

- return layerImpl;

- if (layerImpl->drawsContent() && layerImpl->parent() && layerImpl->parent()->scrollable())

- return layerImpl->parent();

- return 0;

-void CCLayerTreeHostImpl::setRootLayer(scoped_ptr<CCLayerImpl> layer)

- m_rootLayerImpl = layer.Pass();

- m_rootScrollLayerImpl = findRootScrollLayer(m_rootLayerImpl.get());

- m_currentlyScrollingLayerImpl = 0;

- if (m_rootLayerImpl && m_scrollingLayerIdFromPreviousTree != -1)

- m_currentlyScrollingLayerImpl = CCLayerTreeHostCommon::findLayerInSubtree(m_rootLayerImpl.get(), m_scrollingLayerIdFromPreviousTree);

- m_scrollingLayerIdFromPreviousTree = -1;

- m_client->onCanDrawStateChanged(canDraw());

-scoped_ptr<CCLayerImpl> CCLayerTreeHostImpl::detachLayerTree()

- // Clear all data structures that have direct references to the layer tree.

- m_scrollingLayerIdFromPreviousTree = m_currentlyScrollingLayerImpl ? m_currentlyScrollingLayerImpl->id() : -1;

- m_currentlyScrollingLayerImpl = 0;

- m_renderSurfaceLayerList.clear();

- return m_rootLayerImpl.Pass();

-void CCLayerTreeHostImpl::setVisible(bool visible)

- ASSERT(CCProxy::isImplThread());

- if (m_visible == visible)

- return;

- m_visible = visible;

- didVisibilityChange(this, m_visible);

- if (!m_renderer)

- return;

- m_renderer->setVisible(visible);

- setBackgroundTickingEnabled(!m_visible && m_needsAnimateLayers);

-bool CCLayerTreeHostImpl::initializeRenderer(scoped_ptr<CCGraphicsContext> context)

- // Since we will create a new resource provider, we cannot continue to use

- // the old resources (i.e. renderSurfaces and texture IDs). Clear them

- // before we destroy the old resource provider.

- if (m_rootLayerImpl) {

- clearRenderSurfaces();

- sendDidLoseContextRecursive(m_rootLayerImpl.get());

- }

- // Note: order is important here.

- m_renderer.clear();

- m_resourceProvider.clear();

- m_context.reset();

- if (!context->bindToClient(this))

- return false;

- OwnPtr<CCResourceProvider> resourceProvider = CCResourceProvider::create(context.get());

- if (!resourceProvider)

- return false;

- if (context->context3D())

- m_renderer = CCRendererGL::create(this, resourceProvider.get());

- else if (context->softwareDevice())

- m_renderer = CCRendererSoftware::create(this, resourceProvider.get(), context->softwareDevice());

- if (!m_renderer)

- return false;

- m_resourceProvider = resourceProvider.release();

- m_context = context.Pass();

- if (!m_visible)

- m_renderer->setVisible(m_visible);

- m_client->onCanDrawStateChanged(canDraw());

- return true;

-void CCLayerTreeHostImpl::setContentsTexturesPurged()

- m_contentsTexturesPurged = true;

- m_client->onCanDrawStateChanged(canDraw());

-void CCLayerTreeHostImpl::resetContentsTexturesPurged()

- m_contentsTexturesPurged = false;

- m_client->onCanDrawStateChanged(canDraw());

-void CCLayerTreeHostImpl::setViewportSize(const IntSize& layoutViewportSize, const IntSize& deviceViewportSize)

- if (layoutViewportSize == m_layoutViewportSize && deviceViewportSize == m_deviceViewportSize)

- return;

- m_layoutViewportSize = layoutViewportSize;

- m_deviceViewportSize = deviceViewportSize;

- m_pinchZoomViewport.setLayoutViewportSize(FloatSize(layoutViewportSize));

- updateMaxScrollPosition();

- if (m_renderer)

- m_renderer->viewportChanged();

- m_client->onCanDrawStateChanged(canDraw());

-static void adjustScrollsForPageScaleChange(CCLayerImpl* layerImpl, float pageScaleChange)

- if (!layerImpl)

- return;

- if (layerImpl->scrollable()) {

- // We need to convert impl-side scroll deltas to pageScale space.

- FloatSize scrollDelta = layerImpl->scrollDelta();

- scrollDelta.scale(pageScaleChange);

- layerImpl->setScrollDelta(scrollDelta);

- }

- for (size_t i = 0; i < layerImpl->children().size(); ++i)

- adjustScrollsForPageScaleChange(layerImpl->children()[i], pageScaleChange);

-void CCLayerTreeHostImpl::setDeviceScaleFactor(float deviceScaleFactor)

- if (deviceScaleFactor == m_deviceScaleFactor)

- return;

- m_deviceScaleFactor = deviceScaleFactor;

- updateMaxScrollPosition();

-float CCLayerTreeHostImpl::pageScaleFactor() const

- return m_pinchZoomViewport.pageScaleFactor();

-void CCLayerTreeHostImpl::setPageScaleFactorAndLimits(float pageScaleFactor, float minPageScaleFactor, float maxPageScaleFactor)

- if (!pageScaleFactor)

- return;

- float pageScaleChange = pageScaleFactor / m_pinchZoomViewport.pageScaleFactor();

- m_pinchZoomViewport.setPageScaleFactorAndLimits(pageScaleFactor, minPageScaleFactor, maxPageScaleFactor);

- if (!CCSettings::pageScalePinchZoomEnabled()) {

- if (pageScaleChange != 1)

- adjustScrollsForPageScaleChange(m_rootScrollLayerImpl, pageScaleChange);

- }

- // Clamp delta to limits and refresh display matrix.

- setPageScaleDelta(m_pinchZoomViewport.pageScaleDelta() / m_pinchZoomViewport.sentPageScaleDelta());

- m_pinchZoomViewport.setSentPageScaleDelta(1);

-void CCLayerTreeHostImpl::setPageScaleDelta(float delta)

- m_pinchZoomViewport.setPageScaleDelta(delta);

- updateMaxScrollPosition();

-void CCLayerTreeHostImpl::updateMaxScrollPosition()

- if (!m_rootScrollLayerImpl || !m_rootScrollLayerImpl->children().size())

- return;

- FloatSize viewBounds = m_deviceViewportSize;

- if (CCLayerImpl* clipLayer = m_rootScrollLayerImpl->parent()) {

- // Compensate for non-overlay scrollbars.

- if (clipLayer->masksToBounds()) {

- viewBounds = clipLayer->bounds();

- viewBounds.scale(m_deviceScaleFactor);

- }

- IntSize contentBounds = contentSize();

- if (CCSettings::pageScalePinchZoomEnabled()) {

- // Pinch with pageScale scrolls entirely in layout space. contentSize

- // returns the bounds including the page scale factor, so calculate the

- // pre page-scale layout size here.

- float pageScaleFactor = m_pinchZoomViewport.pageScaleFactor();

- contentBounds.setWidth(contentBounds.width() / pageScaleFactor);

- contentBounds.setHeight(contentBounds.height() / pageScaleFactor);

- } else {

- viewBounds.scale(1 / m_pinchZoomViewport.pageScaleDelta());

- }

- IntSize maxScroll = contentBounds - expandedIntSize(viewBounds);

- maxScroll.scale(1 / m_deviceScaleFactor);

- // The viewport may be larger than the contents in some cases, such as

- // having a vertical scrollbar but no horizontal overflow.

- maxScroll.clampNegativeToZero();

- m_rootScrollLayerImpl->setMaxScrollPosition(maxScroll);

-void CCLayerTreeHostImpl::setNeedsRedraw()

- m_client->setNeedsRedrawOnImplThread();

-bool CCLayerTreeHostImpl::ensureRenderSurfaceLayerList()

- if (!m_rootLayerImpl)

- return false;

- if (!m_renderer)

- return false;

- // We need both a non-empty render surface layer list and a root render

- // surface to be able to iterate over the visible layers.

- if (m_renderSurfaceLayerList.size() && m_rootLayerImpl->renderSurface())

- return true;

- // If we are called after setRootLayer() but before prepareToDraw(), we need

- // to recalculate the visible layers. This prevents being unable to scroll

- // during part of a commit.

- m_renderSurfaceLayerList.clear();

- calculateRenderSurfaceLayerList(m_renderSurfaceLayerList);

- return m_renderSurfaceLayerList.size();

-CCInputHandlerClient::ScrollStatus CCLayerTreeHostImpl::scrollBegin(const IntPoint& viewportPoint, CCInputHandlerClient::ScrollInputType type)

- TRACE_EVENT0("cc", "CCLayerTreeHostImpl::scrollBegin");

- ASSERT(!m_currentlyScrollingLayerImpl);

- clearCurrentlyScrollingLayer();

- if (!ensureRenderSurfaceLayerList())

- return ScrollIgnored;

- IntPoint deviceViewportPoint = viewportPoint;

- deviceViewportPoint.scale(m_deviceScaleFactor, m_deviceScaleFactor);

- // First find out which layer was hit from the saved list of visible layers

- // in the most recent frame.

- CCLayerImpl* layerImpl = CCLayerTreeHostCommon::findLayerThatIsHitByPoint(viewportPoint, m_renderSurfaceLayerList);

- // Walk up the hierarchy and look for a scrollable layer.

- CCLayerImpl* potentiallyScrollingLayerImpl = 0;

- for (; layerImpl; layerImpl = layerImpl->parent()) {

- // The content layer can also block attempts to scroll outside the main thread.

- if (layerImpl->tryScroll(deviceViewportPoint, type) == ScrollOnMainThread) {

- m_numMainThreadScrolls++;

- return ScrollOnMainThread;

- }

- CCLayerImpl* scrollLayerImpl = findScrollLayerForContentLayer(layerImpl);

- if (!scrollLayerImpl)

- continue;

- ScrollStatus status = scrollLayerImpl->tryScroll(viewportPoint, type);

- // If any layer wants to divert the scroll event to the main thread, abort.

- if (status == ScrollOnMainThread) {

- m_numMainThreadScrolls++;

- return ScrollOnMainThread;

- }

- if (status == ScrollStarted && !potentiallyScrollingLayerImpl)

- potentiallyScrollingLayerImpl = scrollLayerImpl;

- }

- if (potentiallyScrollingLayerImpl) {

- m_currentlyScrollingLayerImpl = potentiallyScrollingLayerImpl;

- // Gesture events need to be transformed from screen coordinates to local layer coordinates

- // so that the scrolling contents exactly follow the user's finger. In contrast, wheel

- // events are already in local layer coordinates so we can just apply them directly.

- m_scrollDeltaIsInScreenSpace = (type == Gesture);

- m_numImplThreadScrolls++;

- return ScrollStarted;

- }

- return ScrollIgnored;

-static FloatSize scrollLayerWithScreenSpaceDelta(CCPinchZoomViewport* viewport, CCLayerImpl& layerImpl, const FloatPoint& screenSpacePoint, const FloatSize& screenSpaceDelta)

- // Layers with non-invertible screen space transforms should not have passed the scroll hit

- // test in the first place.

- ASSERT(layerImpl.screenSpaceTransform().isInvertible());

- WebTransformationMatrix inverseScreenSpaceTransform = layerImpl.screenSpaceTransform().inverse();

- // First project the scroll start and end points to local layer space to find the scroll delta

- // in layer coordinates.

- bool startClipped, endClipped;

- FloatPoint screenSpaceEndPoint = screenSpacePoint + screenSpaceDelta;

- FloatPoint localStartPoint = CCMathUtil::projectPoint(inverseScreenSpaceTransform, screenSpacePoint, startClipped);

- FloatPoint localEndPoint = CCMathUtil::projectPoint(inverseScreenSpaceTransform, screenSpaceEndPoint, endClipped);

- // In general scroll point coordinates should not get clipped.

- ASSERT(!startClipped);

- ASSERT(!endClipped);

- if (startClipped || endClipped)

- return FloatSize();

- // Apply the scroll delta.

- FloatSize previousDelta(layerImpl.scrollDelta());

- FloatSize unscrolled = layerImpl.scrollBy(localEndPoint - localStartPoint);

- if (viewport)

- viewport->applyScroll(unscrolled);

- // Calculate the applied scroll delta in screen space coordinates.

- FloatPoint actualLocalEndPoint = localStartPoint + layerImpl.scrollDelta() - previousDelta;

- FloatPoint actualScreenSpaceEndPoint = CCMathUtil::mapPoint(layerImpl.screenSpaceTransform(), actualLocalEndPoint, endClipped);

- ASSERT(!endClipped);

- if (endClipped)

- return FloatSize();

- return actualScreenSpaceEndPoint - screenSpacePoint;

-static FloatSize scrollLayerWithLocalDelta(CCLayerImpl& layerImpl, const FloatSize& localDelta)

- FloatSize previousDelta(layerImpl.scrollDelta());

- layerImpl.scrollBy(localDelta);

- return layerImpl.scrollDelta() - previousDelta;

-void CCLayerTreeHostImpl::scrollBy(const IntPoint& viewportPoint, const IntSize& scrollDelta)

- TRACE_EVENT0("cc", "CCLayerTreeHostImpl::scrollBy");

- if (!m_currentlyScrollingLayerImpl)

- return;

- FloatSize pendingDelta(scrollDelta);

- pendingDelta.scale(m_deviceScaleFactor);

- for (CCLayerImpl* layerImpl = m_currentlyScrollingLayerImpl; layerImpl; layerImpl = layerImpl->parent()) {

- if (!layerImpl->scrollable())

- continue;

- CCPinchZoomViewport* viewport = layerImpl == m_rootScrollLayerImpl ? &m_pinchZoomViewport : 0;

- FloatSize appliedDelta;

- if (m_scrollDeltaIsInScreenSpace)

- appliedDelta = scrollLayerWithScreenSpaceDelta(viewport, *layerImpl, viewportPoint, pendingDelta);

- else

- appliedDelta = scrollLayerWithLocalDelta(*layerImpl, pendingDelta);

- // If the layer wasn't able to move, try the next one in the hierarchy.

- float moveThresholdSquared = 0.1f * 0.1f;

- if (appliedDelta.diagonalLengthSquared() < moveThresholdSquared)

- continue;

- // If the applied delta is within 45 degrees of the input delta, bail out to make it easier

- // to scroll just one layer in one direction without affecting any of its parents.

- float angleThreshold = 45;

- if (CCMathUtil::smallestAngleBetweenVectors(appliedDelta, pendingDelta) < angleThreshold) {

- pendingDelta = FloatSize();

- break;

- }

- // Allow further movement only on an axis perpendicular to the direction in which the layer

- // moved.

- FloatSize perpendicularAxis(-appliedDelta.height(), appliedDelta.width());

- pendingDelta = CCMathUtil::projectVector(pendingDelta, perpendicularAxis);

- if (flooredIntSize(pendingDelta).isZero())

- break;

- }

- if (!scrollDelta.isZero() && flooredIntSize(pendingDelta).isEmpty()) {

- m_client->setNeedsCommitOnImplThread();

- m_client->setNeedsRedrawOnImplThread();

- }

-void CCLayerTreeHostImpl::clearCurrentlyScrollingLayer()

- m_currentlyScrollingLayerImpl = 0;

- m_scrollingLayerIdFromPreviousTree = -1;

-void CCLayerTreeHostImpl::scrollEnd()

- clearCurrentlyScrollingLayer();

-void CCLayerTreeHostImpl::pinchGestureBegin()

- m_pinchGestureActive = true;

- m_previousPinchAnchor = IntPoint();

- if (m_rootScrollLayerImpl && m_rootScrollLayerImpl->scrollbarAnimationController())

- m_rootScrollLayerImpl->scrollbarAnimationController()->didPinchGestureBegin();

-void CCLayerTreeHostImpl::pinchGestureUpdate(float magnifyDelta,

- const IntPoint& anchor)

- TRACE_EVENT0("cc", "CCLayerTreeHostImpl::pinchGestureUpdate");

- if (!m_rootScrollLayerImpl)

- return;

- if (m_previousPinchAnchor == IntPoint::zero())

- m_previousPinchAnchor = anchor;

- // Keep the center-of-pinch anchor specified by (x, y) in a stable

- // position over the course of the magnify.

- float pageScaleDelta = m_pinchZoomViewport.pageScaleDelta();

- FloatPoint previousScaleAnchor(m_previousPinchAnchor.x() / pageScaleDelta,

- m_previousPinchAnchor.y() / pageScaleDelta);

- setPageScaleDelta(pageScaleDelta * magnifyDelta);

- pageScaleDelta = m_pinchZoomViewport.pageScaleDelta();

- FloatPoint newScaleAnchor(anchor.x() / pageScaleDelta, anchor.y() / pageScaleDelta);

- FloatSize move = previousScaleAnchor - newScaleAnchor;

- m_previousPinchAnchor = anchor;

- if (CCSettings::pageScalePinchZoomEnabled()) {

- // Compute the application of the delta with respect to the current page zoom of the page.

- move.scale(1 / (m_pinchZoomViewport.pageScaleFactor() * m_deviceScaleFactor));

- }

- FloatSize scrollOverflow = CCSettings::pageScalePinchZoomEnabled() ? m_pinchZoomViewport.applyScroll(move) : move;

- m_rootScrollLayerImpl->scrollBy(roundedIntSize(scrollOverflow));

- if (m_rootScrollLayerImpl->scrollbarAnimationController())

- m_rootScrollLayerImpl->scrollbarAnimationController()->didPinchGestureUpdate();

- m_client->setNeedsCommitOnImplThread();

- m_client->setNeedsRedrawOnImplThread();

-void CCLayerTreeHostImpl::pinchGestureEnd()

- m_pinchGestureActive = false;

- if (m_rootScrollLayerImpl && m_rootScrollLayerImpl->scrollbarAnimationController())

- m_rootScrollLayerImpl->scrollbarAnimationController()->didPinchGestureEnd();

- m_client->setNeedsCommitOnImplThread();

-void CCLayerTreeHostImpl::computeDoubleTapZoomDeltas(CCScrollAndScaleSet* scrollInfo)

- float pageScale = m_pageScaleAnimation->finalPageScale();

- IntSize scrollOffset = m_pageScaleAnimation->finalScrollOffset();

- scrollOffset.scale(m_pinchZoomViewport.pageScaleFactor() / pageScale);

- makeScrollAndScaleSet(scrollInfo, scrollOffset, pageScale);

-void CCLayerTreeHostImpl::computePinchZoomDeltas(CCScrollAndScaleSet* scrollInfo)

- if (!m_rootScrollLayerImpl)

- return;

- // Only send fake scroll/zoom deltas if we're pinch zooming out by a

- // significant amount. This also ensures only one fake delta set will be

- // sent.

- const float pinchZoomOutSensitivity = 0.95f;

- if (m_pinchZoomViewport.pageScaleDelta() > pinchZoomOutSensitivity)

- return;

- // Compute where the scroll offset/page scale would be if fully pinch-zoomed

- // out from the anchor point.

- IntSize scrollBegin = flooredIntSize(m_rootScrollLayerImpl->scrollPosition() + m_rootScrollLayerImpl->scrollDelta());

- scrollBegin.scale(m_pinchZoomViewport.pageScaleDelta());

- float scaleBegin = m_pinchZoomViewport.totalPageScaleFactor();

- float pageScaleDeltaToSend = m_pinchZoomViewport.minPageScaleFactor() / m_pinchZoomViewport.pageScaleFactor();

- FloatSize scaledContentsSize = contentSize();

- scaledContentsSize.scale(pageScaleDeltaToSend);

- FloatSize anchor = toSize(m_previousPinchAnchor);

- FloatSize scrollEnd = scrollBegin + anchor;

- scrollEnd.scale(m_pinchZoomViewport.minPageScaleFactor() / scaleBegin);

- scrollEnd -= anchor;

- scrollEnd = scrollEnd.shrunkTo(roundedIntSize(scaledContentsSize - m_deviceViewportSize)).expandedTo(FloatSize(0, 0));

- scrollEnd.scale(1 / pageScaleDeltaToSend);

- scrollEnd.scale(m_deviceScaleFactor);

- makeScrollAndScaleSet(scrollInfo, roundedIntSize(scrollEnd), m_pinchZoomViewport.minPageScaleFactor());

-void CCLayerTreeHostImpl::makeScrollAndScaleSet(CCScrollAndScaleSet* scrollInfo, const IntSize& scrollOffset, float pageScale)

- if (!m_rootScrollLayerImpl)

- return;

- CCLayerTreeHostCommon::ScrollUpdateInfo scroll;

- scroll.layerId = m_rootScrollLayerImpl->id();

- scroll.scrollDelta = scrollOffset - toSize(m_rootScrollLayerImpl->scrollPosition());

- scrollInfo->scrolls.append(scroll);

- m_rootScrollLayerImpl->setSentScrollDelta(scroll.scrollDelta);

- scrollInfo->pageScaleDelta = pageScale / m_pinchZoomViewport.pageScaleFactor();

- m_pinchZoomViewport.setSentPageScaleDelta(scrollInfo->pageScaleDelta);

-static void collectScrollDeltas(CCScrollAndScaleSet* scrollInfo, CCLayerImpl* layerImpl)

- if (!layerImpl)

- return;

- if (!layerImpl->scrollDelta().isZero()) {

- IntSize scrollDelta = flooredIntSize(layerImpl->scrollDelta());

- CCLayerTreeHostCommon::ScrollUpdateInfo scroll;

- scroll.layerId = layerImpl->id();

- scroll.scrollDelta = scrollDelta;

- scrollInfo->scrolls.append(scroll);

- layerImpl->setSentScrollDelta(scrollDelta);

- }

- for (size_t i = 0; i < layerImpl->children().size(); ++i)

- collectScrollDeltas(scrollInfo, layerImpl->children()[i]);

-scoped_ptr<CCScrollAndScaleSet> CCLayerTreeHostImpl::processScrollDeltas()

- scoped_ptr<CCScrollAndScaleSet> scrollInfo(new CCScrollAndScaleSet());

- if (m_pinchGestureActive || m_pageScaleAnimation) {

- scrollInfo->pageScaleDelta = 1;

- m_pinchZoomViewport.setSentPageScaleDelta(1);

- // FIXME(aelias): Make these painting optimizations compatible with

- // compositor-side scaling.

- if (!CCSettings::pageScalePinchZoomEnabled()) {

- if (m_pinchGestureActive)

- computePinchZoomDeltas(scrollInfo.get());

- else if (m_pageScaleAnimation.get())

- computeDoubleTapZoomDeltas(scrollInfo.get());

- }

- return scrollInfo.Pass();

- }

- collectScrollDeltas(scrollInfo.get(), m_rootLayerImpl.get());

- scrollInfo->pageScaleDelta = m_pinchZoomViewport.pageScaleDelta();

- m_pinchZoomViewport.setSentPageScaleDelta(scrollInfo->pageScaleDelta);

- return scrollInfo.Pass();

-WebTransformationMatrix CCLayerTreeHostImpl::implTransform() const

- return m_pinchZoomViewport.implTransform();

-void CCLayerTreeHostImpl::setFullRootLayerDamage()

- if (m_rootLayerImpl) {

- CCRenderSurface* renderSurface = m_rootLayerImpl->renderSurface();

- if (renderSurface)

- renderSurface->damageTracker()->forceFullDamageNextUpdate();

- }

-void CCLayerTreeHostImpl::animatePageScale(double monotonicTime)

- if (!m_pageScaleAnimation || !m_rootScrollLayerImpl)

- return;

- IntSize scrollTotal = flooredIntSize(m_rootScrollLayerImpl->scrollPosition() + m_rootScrollLayerImpl->scrollDelta());

- setPageScaleDelta(m_pageScaleAnimation->pageScaleAtTime(monotonicTime) / m_pinchZoomViewport.pageScaleFactor());

- IntSize nextScroll = m_pageScaleAnimation->scrollOffsetAtTime(monotonicTime);

- nextScroll.scale(1 / m_pinchZoomViewport.pageScaleDelta());

- m_rootScrollLayerImpl->scrollBy(nextScroll - scrollTotal);

- m_client->setNeedsRedrawOnImplThread();

- if (m_pageScaleAnimation->isAnimationCompleteAtTime(monotonicTime)) {

- m_pageScaleAnimation.clear();

- m_client->setNeedsCommitOnImplThread();

- }

-void CCLayerTreeHostImpl::animateLayers(double monotonicTime, double wallClockTime)

- if (!CCSettings::acceleratedAnimationEnabled() || !m_needsAnimateLayers || !m_rootLayerImpl)

- return;

- TRACE_EVENT0("cc", "CCLayerTreeHostImpl::animateLayers");

- scoped_ptr<CCAnimationEventsVector> events(make_scoped_ptr(new CCAnimationEventsVector));

- bool didAnimate = false;

- animateLayersRecursive(m_rootLayerImpl.get(), monotonicTime, wallClockTime, events.get(), didAnimate, m_needsAnimateLayers);

- if (!events->empty())

- m_client->postAnimationEventsToMainThreadOnImplThread(events.Pass(), wallClockTime);

- if (didAnimate)

- m_client->setNeedsRedrawOnImplThread();

- setBackgroundTickingEnabled(!m_visible && m_needsAnimateLayers);

-base::TimeDelta CCLayerTreeHostImpl::lowFrequencyAnimationInterval() const

- return base::TimeDelta::FromSeconds(1);

-void CCLayerTreeHostImpl::sendDidLoseContextRecursive(CCLayerImpl* current)

- ASSERT(current);

- current->didLoseContext();

- if (current->maskLayer())

- sendDidLoseContextRecursive(current->maskLayer());

- if (current->replicaLayer())

- sendDidLoseContextRecursive(current->replicaLayer());

- for (size_t i = 0; i < current->children().size(); ++i)

- sendDidLoseContextRecursive(current->children()[i]);

-static void clearRenderSurfacesOnCCLayerImplRecursive(CCLayerImpl* current)

- ASSERT(current);

- for (size_t i = 0; i < current->children().size(); ++i)

- clearRenderSurfacesOnCCLayerImplRecursive(current->children()[i]);

- current->clearRenderSurface();

-void CCLayerTreeHostImpl::clearRenderSurfaces()

- clearRenderSurfacesOnCCLayerImplRecursive(m_rootLayerImpl.get());

- m_renderSurfaceLayerList.clear();

-std::string CCLayerTreeHostImpl::layerTreeAsText() const

- std::string str;

- if (m_rootLayerImpl) {

- str = m_rootLayerImpl->layerTreeAsText();

- str += "RenderSurfaces:\n";

- dumpRenderSurfaces(&str, 1, m_rootLayerImpl.get());

- }

- return str;

-void CCLayerTreeHostImpl::dumpRenderSurfaces(std::string* str, int indent, const CCLayerImpl* layer) const

- if (layer->renderSurface())

- layer->renderSurface()->dumpSurface(str, indent);

- for (size_t i = 0; i < layer->children().size(); ++i)

- dumpRenderSurfaces(str, indent, layer->children()[i]);

-int CCLayerTreeHostImpl::sourceAnimationFrameNumber() const

- return fpsCounter()->currentFrameNumber();

-void CCLayerTreeHostImpl::renderingStats(CCRenderingStats* stats) const

- stats->numFramesSentToScreen = fpsCounter()->currentFrameNumber();

- stats->droppedFrameCount = fpsCounter()->droppedFrameCount();

- stats->numImplThreadScrolls = m_numImplThreadScrolls;

- stats->numMainThreadScrolls = m_numMainThreadScrolls;

-void CCLayerTreeHostImpl::animateScrollbars(double monotonicTime)

- animateScrollbarsRecursive(m_rootLayerImpl.get(), monotonicTime);

-void CCLayerTreeHostImpl::animateScrollbarsRecursive(CCLayerImpl* layer, double monotonicTime)

- if (!layer)

- return;

- CCScrollbarAnimationController* scrollbarController = layer->scrollbarAnimationController();

- if (scrollbarController && scrollbarController->animate(monotonicTime))

- m_client->setNeedsRedrawOnImplThread();

- for (size_t i = 0; i < layer->children().size(); ++i)

- animateScrollbarsRecursive(layer->children()[i], monotonicTime);

-} // namespace cc

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