/*
* Copyright (C) 2009 Apple 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 INC. ``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 COMPUTER, INC. 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"
#if USE(ACCELERATED_COMPOSITING)
#include "RenderLayerBacking.h"
#include "AnimationController.h"
#include "CanvasRenderingContext.h"
#include "CanvasRenderingContext2D.h"
#include "CSSPropertyNames.h"
#include "CSSStyleSelector.h"
#include "FrameView.h"
#include "GraphicsContext.h"
#include "GraphicsLayer.h"
#include "HTMLCanvasElement.h"
#include "HTMLElement.h"
#include "HTMLIFrameElement.h"
#include "HTMLMediaElement.h"
#include "HTMLNames.h"
#include "InspectorInstrumentation.h"
#include "KeyframeList.h"
#include "PluginViewBase.h"
#include "RenderApplet.h"
#include "RenderBox.h"
#include "RenderIFrame.h"
#include "RenderImage.h"
#include "RenderLayerCompositor.h"
#include "RenderEmbeddedObject.h"
#include "RenderVideo.h"
#include "RenderView.h"
#include "Settings.h"
#if ENABLE(WEBGL) || ENABLE(ACCELERATED_2D_CANVAS)
#include "GraphicsContext3D.h"
#endif
using namespace std;
namespace WebCore {
using namespace HTMLNames;
static bool hasBorderOutlineOrShadow(const RenderStyle*);
static bool hasBoxDecorationsOrBackground(const RenderObject*);
static bool hasBoxDecorationsOrBackgroundImage(const RenderStyle*);
static IntRect clipBox(RenderBox* renderer);
static inline bool isAcceleratedCanvas(RenderObject* renderer)
{
#if ENABLE(WEBGL) || ENABLE(ACCELERATED_2D_CANVAS)
if (renderer->isCanvas()) {
HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(renderer->node());
if (CanvasRenderingContext* context = canvas->renderingContext())
return context->isAccelerated();
}
#else
UNUSED_PARAM(renderer);
#endif
return false;
}
RenderLayerBacking::RenderLayerBacking(RenderLayer* layer)
: m_owningLayer(layer)
, m_artificiallyInflatedBounds(false)
{
createGraphicsLayer();
}
RenderLayerBacking::~RenderLayerBacking()
{
updateClippingLayers(false, false);
updateOverflowControlsLayers(false, false, false);
updateForegroundLayer(false);
updateMaskLayer(false);
destroyGraphicsLayer();
}
void RenderLayerBacking::createGraphicsLayer()
{
m_graphicsLayer = GraphicsLayer::create(this);
#ifndef NDEBUG
m_graphicsLayer->setName(nameForLayer());
#endif // NDEBUG
#if USE(ACCELERATED_COMPOSITING)
ASSERT(renderer() && renderer()->document() && renderer()->document()->frame());
if (Frame* frame = renderer()->document()->frame())
m_graphicsLayer->setContentsScale(frame->pageScaleFactor());
#endif
updateLayerOpacity(renderer()->style());
updateLayerTransform(renderer()->style());
}
void RenderLayerBacking::destroyGraphicsLayer()
{
if (m_graphicsLayer)
m_graphicsLayer->removeFromParent();
m_graphicsLayer = 0;
m_foregroundLayer = 0;
m_clippingLayer = 0;
m_maskLayer = 0;
}
void RenderLayerBacking::updateLayerOpacity(const RenderStyle* style)
{
m_graphicsLayer->setOpacity(compositingOpacity(style->opacity()));
}
void RenderLayerBacking::updateLayerTransform(const RenderStyle* style)
{
// FIXME: This could use m_owningLayer->transform(), but that currently has transform-origin
// baked into it, and we don't want that.
TransformationMatrix t;
if (m_owningLayer->hasTransform()) {
style->applyTransform(t, toRenderBox(renderer())->borderBoxRect().size(), RenderStyle::ExcludeTransformOrigin);
makeMatrixRenderable(t, compositor()->canRender3DTransforms());
}
m_graphicsLayer->setTransform(t);
}
static bool hasNonZeroTransformOrigin(const RenderObject* renderer)
{
RenderStyle* style = renderer->style();
return (style->transformOriginX().type() == Fixed && style->transformOriginX().value())
|| (style->transformOriginY().type() == Fixed && style->transformOriginY().value());
}
static bool layerOrAncestorIsTransformed(RenderLayer* layer)
{
for (RenderLayer* curr = layer; curr; curr = curr->parent()) {
if (curr->hasTransform())
return true;
}
return false;
}
#if ENABLE(FULLSCREEN_API)
static bool layerOrAncestorIsFullScreen(RenderLayer* layer)
{
// Don't traverse through the render layer tree if we do not yet have a full screen renderer.
if (!layer->renderer()->document()->fullScreenRenderer())
return false;
for (RenderLayer* curr = layer; curr; curr = curr->parent()) {
if (curr->renderer()->isRenderFullScreen())
return true;
}
return false;
}
#endif
void RenderLayerBacking::updateCompositedBounds()
{
IntRect layerBounds = compositor()->calculateCompositedBounds(m_owningLayer, m_owningLayer);
// Clip to the size of the document or enclosing overflow-scroll layer.
// If this or an ancestor is transformed, we can't currently compute the correct rect to intersect with.
// We'd need RenderObject::convertContainerToLocalQuad(), which doesn't yet exist. If this
// is a fullscreen renderer, don't clip to the viewport, as the renderer will be asked to
// display outside of the viewport bounds.
if (compositor()->compositingConsultsOverlap() && !layerOrAncestorIsTransformed(m_owningLayer)
#if ENABLE(FULLSCREEN_API)
&& !layerOrAncestorIsFullScreen(m_owningLayer)
#endif
) {
RenderView* view = m_owningLayer->renderer()->view();
RenderLayer* rootLayer = view->layer();
// Start by clipping to the view's bounds.
IntRect clippingBounds = view->layoutOverflowRect();
if (m_owningLayer != rootLayer)
clippingBounds.intersect(m_owningLayer->backgroundClipRect(rootLayer, true));
int deltaX = 0;
int deltaY = 0;
m_owningLayer->convertToLayerCoords(rootLayer, deltaX, deltaY);
clippingBounds.move(-deltaX, -deltaY);
layerBounds.intersect(clippingBounds);
}
// If the element has a transform-origin that has fixed lengths, and the renderer has zero size,
// then we need to ensure that the compositing layer has non-zero size so that we can apply
// the transform-origin via the GraphicsLayer anchorPoint (which is expressed as a fractional value).
if (layerBounds.isEmpty() && hasNonZeroTransformOrigin(renderer())) {
layerBounds.setWidth(1);
layerBounds.setHeight(1);
m_artificiallyInflatedBounds = true;
} else
m_artificiallyInflatedBounds = false;
setCompositedBounds(layerBounds);
}
void RenderLayerBacking::updateAfterWidgetResize()
{
if (renderer()->isRenderPart()) {
if (RenderLayerCompositor* innerCompositor = RenderLayerCompositor::frameContentsCompositor(toRenderPart(renderer()))) {
innerCompositor->frameViewDidChangeSize();
innerCompositor->frameViewDidChangeLocation(contentsBox().location());
}
}
}
void RenderLayerBacking::updateAfterLayout(UpdateDepth updateDepth, bool isUpdateRoot)
{
RenderLayerCompositor* layerCompositor = compositor();
if (!layerCompositor->compositingLayersNeedRebuild()) {
// Calling updateGraphicsLayerGeometry() here gives incorrect results, because the
// position of this layer's GraphicsLayer depends on the position of our compositing
// ancestor's GraphicsLayer. That cannot be determined until all the descendant
// RenderLayers of that ancestor have been processed via updateLayerPositions().
//
// The solution is to update compositing children of this layer here,
// via updateCompositingChildrenGeometry().
updateCompositedBounds();
layerCompositor->updateCompositingDescendantGeometry(m_owningLayer, m_owningLayer, updateDepth);
if (isUpdateRoot) {
updateGraphicsLayerGeometry();
layerCompositor->updateRootLayerPosition();
}
}
}
bool RenderLayerBacking::updateGraphicsLayerConfiguration()
{
RenderLayerCompositor* compositor = this->compositor();
RenderObject* renderer = this->renderer();
bool layerConfigChanged = false;
if (updateForegroundLayer(compositor->needsContentsCompositingLayer(m_owningLayer)))
layerConfigChanged = true;
if (updateClippingLayers(compositor->clippedByAncestor(m_owningLayer), compositor->clipsCompositingDescendants(m_owningLayer)))
layerConfigChanged = true;
if (updateOverflowControlsLayers(requiresHorizontalScrollbarLayer(), requiresVerticalScrollbarLayer(), requiresScrollCornerLayer()))
layerConfigChanged = true;
if (layerConfigChanged)
updateInternalHierarchy();
if (updateMaskLayer(renderer->hasMask()))
m_graphicsLayer->setMaskLayer(m_maskLayer.get());
if (m_owningLayer->hasReflection()) {
if (m_owningLayer->reflectionLayer()->backing()) {
GraphicsLayer* reflectionLayer = m_owningLayer->reflectionLayer()->backing()->graphicsLayer();
m_graphicsLayer->setReplicatedByLayer(reflectionLayer);
}
} else
m_graphicsLayer->setReplicatedByLayer(0);
if (isDirectlyCompositedImage())
updateImageContents();
if ((renderer->isEmbeddedObject() && toRenderEmbeddedObject(renderer)->allowsAcceleratedCompositing())
|| (renderer->isApplet() && toRenderApplet(renderer)->allowsAcceleratedCompositing())) {
PluginViewBase* pluginViewBase = static_cast<PluginViewBase*>(toRenderWidget(renderer)->widget());
m_graphicsLayer->setContentsToMedia(pluginViewBase->platformLayer());
}
#if ENABLE(VIDEO)
else if (renderer->isVideo()) {
HTMLMediaElement* mediaElement = static_cast<HTMLMediaElement*>(renderer->node());
m_graphicsLayer->setContentsToMedia(mediaElement->platformLayer());
}
#endif
#if ENABLE(WEBGL) || ENABLE(ACCELERATED_2D_CANVAS)
else if (isAcceleratedCanvas(renderer)) {
HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(renderer->node());
if (CanvasRenderingContext* context = canvas->renderingContext())
m_graphicsLayer->setContentsToCanvas(context->platformLayer());
layerConfigChanged = true;
}
#endif
if (renderer->isRenderPart())
layerConfigChanged = RenderLayerCompositor::parentFrameContentLayers(toRenderPart(renderer));
return layerConfigChanged;
}
static IntRect clipBox(RenderBox* renderer)
{
IntRect result = PaintInfo::infiniteRect();
if (renderer->hasOverflowClip())
result = renderer->overflowClipRect(0, 0);
if (renderer->hasClip())
result.intersect(renderer->clipRect(0, 0));
return result;
}
void RenderLayerBacking::updateGraphicsLayerGeometry()
{
// If we haven't built z-order lists yet, wait until later.
if (m_owningLayer->isStackingContext() && m_owningLayer->m_zOrderListsDirty)
return;
// Set transform property, if it is not animating. We have to do this here because the transform
// is affected by the layer dimensions.
if (!renderer()->animation()->isRunningAcceleratedAnimationOnRenderer(renderer(), CSSPropertyWebkitTransform))
updateLayerTransform(renderer()->style());
// Set opacity, if it is not animating.
if (!renderer()->animation()->isRunningAcceleratedAnimationOnRenderer(renderer(), CSSPropertyOpacity))
updateLayerOpacity(renderer()->style());
RenderStyle* style = renderer()->style();
m_graphicsLayer->setPreserves3D(style->transformStyle3D() == TransformStyle3DPreserve3D && !renderer()->hasReflection());
m_graphicsLayer->setBackfaceVisibility(style->backfaceVisibility() == BackfaceVisibilityVisible);
RenderLayer* compAncestor = m_owningLayer->ancestorCompositingLayer();
// We compute everything relative to the enclosing compositing layer.
IntRect ancestorCompositingBounds;
if (compAncestor) {
ASSERT(compAncestor->backing());
ancestorCompositingBounds = compAncestor->backing()->compositedBounds();
}
IntRect localCompositingBounds = compositedBounds();
IntRect relativeCompositingBounds(localCompositingBounds);
int deltaX = 0, deltaY = 0;
m_owningLayer->convertToLayerCoords(compAncestor, deltaX, deltaY);
relativeCompositingBounds.move(deltaX, deltaY);
IntPoint graphicsLayerParentLocation;
if (compAncestor && compAncestor->backing()->hasClippingLayer()) {
// If the compositing ancestor has a layer to clip children, we parent in that, and therefore
// position relative to it.
IntRect clippingBox = clipBox(toRenderBox(compAncestor->renderer()));
graphicsLayerParentLocation = clippingBox.location();
} else
graphicsLayerParentLocation = ancestorCompositingBounds.location();
if (compAncestor && m_ancestorClippingLayer) {
// Call calculateRects to get the backgroundRect which is what is used to clip the contents of this
// layer. Note that we call it with temporaryClipRects = true because normally when computing clip rects
// for a compositing layer, rootLayer is the layer itself.
IntRect parentClipRect = m_owningLayer->backgroundClipRect(compAncestor, true);
ASSERT(parentClipRect != PaintInfo::infiniteRect());
m_ancestorClippingLayer->setPosition(FloatPoint() + (parentClipRect.location() - graphicsLayerParentLocation));
m_ancestorClippingLayer->setSize(parentClipRect.size());
// backgroundRect is relative to compAncestor, so subtract deltaX/deltaY to get back to local coords.
IntSize rendererOffset(parentClipRect.location().x() - deltaX, parentClipRect.location().y() - deltaY);
m_ancestorClippingLayer->setOffsetFromRenderer(rendererOffset);
// The primary layer is then parented in, and positioned relative to this clipping layer.
graphicsLayerParentLocation = parentClipRect.location();
}
m_graphicsLayer->setPosition(FloatPoint() + (relativeCompositingBounds.location() - graphicsLayerParentLocation));
IntSize oldOffsetFromRenderer = m_graphicsLayer->offsetFromRenderer();
m_graphicsLayer->setOffsetFromRenderer(localCompositingBounds.location() - IntPoint());
// If the compositing layer offset changes, we need to repaint.
if (oldOffsetFromRenderer != m_graphicsLayer->offsetFromRenderer())
m_graphicsLayer->setNeedsDisplay();
FloatSize oldSize = m_graphicsLayer->size();
FloatSize newSize = relativeCompositingBounds.size();
if (oldSize != newSize) {
m_graphicsLayer->setSize(newSize);
// A bounds change will almost always require redisplay. Usually that redisplay
// will happen because of a repaint elsewhere, but not always:
// e.g. see RenderView::setMaximalOutlineSize()
m_graphicsLayer->setNeedsDisplay();
}
// If we have a layer that clips children, position it.
IntRect clippingBox;
if (m_clippingLayer) {
clippingBox = clipBox(toRenderBox(renderer()));
m_clippingLayer->setPosition(FloatPoint() + (clippingBox.location() - localCompositingBounds.location()));
m_clippingLayer->setSize(clippingBox.size());
m_clippingLayer->setOffsetFromRenderer(clippingBox.location() - IntPoint());
}
if (m_maskLayer) {
if (m_maskLayer->size() != m_graphicsLayer->size()) {
m_maskLayer->setSize(m_graphicsLayer->size());
m_maskLayer->setNeedsDisplay();
}
m_maskLayer->setPosition(FloatPoint());
}
if (m_owningLayer->hasTransform()) {
const IntRect borderBox = toRenderBox(renderer())->borderBoxRect();
// Get layout bounds in the coords of compAncestor to match relativeCompositingBounds.
IntRect layerBounds = IntRect(deltaX, deltaY, borderBox.width(), borderBox.height());
// Update properties that depend on layer dimensions
FloatPoint3D transformOrigin = computeTransformOrigin(borderBox);
// Compute the anchor point, which is in the center of the renderer box unless transform-origin is set.
FloatPoint3D anchor(relativeCompositingBounds.width() != 0.0f ? ((layerBounds.x() - relativeCompositingBounds.x()) + transformOrigin.x()) / relativeCompositingBounds.width() : 0.5f,
relativeCompositingBounds.height() != 0.0f ? ((layerBounds.y() - relativeCompositingBounds.y()) + transformOrigin.y()) / relativeCompositingBounds.height() : 0.5f,
transformOrigin.z());
m_graphicsLayer->setAnchorPoint(anchor);
RenderStyle* style = renderer()->style();
if (style->hasPerspective()) {
TransformationMatrix t = owningLayer()->perspectiveTransform();
if (m_clippingLayer) {
m_clippingLayer->setChildrenTransform(t);
m_graphicsLayer->setChildrenTransform(TransformationMatrix());
}
else
m_graphicsLayer->setChildrenTransform(t);
} else {
if (m_clippingLayer)
m_clippingLayer->setChildrenTransform(TransformationMatrix());
else
m_graphicsLayer->setChildrenTransform(TransformationMatrix());
}
} else {
m_graphicsLayer->setAnchorPoint(FloatPoint3D(0.5f, 0.5f, 0));
}
if (m_foregroundLayer) {
FloatPoint foregroundPosition;
FloatSize foregroundSize = newSize;
IntSize foregroundOffset = m_graphicsLayer->offsetFromRenderer();
if (m_clippingLayer) {
// If we have a clipping layer (which clips descendants), then the foreground layer is a child of it,
// so that it gets correctly sorted with children. In that case, position relative to the clipping layer.
foregroundSize = FloatSize(clippingBox.size());
foregroundOffset = clippingBox.location() - IntPoint();
}
m_foregroundLayer->setPosition(foregroundPosition);
m_foregroundLayer->setSize(foregroundSize);
m_foregroundLayer->setOffsetFromRenderer(foregroundOffset);
}
if (m_owningLayer->reflectionLayer() && m_owningLayer->reflectionLayer()->isComposited()) {
RenderLayerBacking* reflectionBacking = m_owningLayer->reflectionLayer()->backing();
reflectionBacking->updateGraphicsLayerGeometry();
// The reflection layer has the bounds of m_owningLayer->reflectionLayer(),
// but the reflected layer is the bounds of this layer, so we need to position it appropriately.
FloatRect layerBounds = compositedBounds();
FloatRect reflectionLayerBounds = reflectionBacking->compositedBounds();
reflectionBacking->graphicsLayer()->setReplicatedLayerPosition(FloatPoint() + (layerBounds.location() - reflectionLayerBounds.location()));
}
m_graphicsLayer->setContentsRect(contentsBox());
updateDrawsContent();
updateAfterWidgetResize();
}
void RenderLayerBacking::updateInternalHierarchy()
{
// m_foregroundLayer has to be inserted in the correct order with child layers,
// so it's not inserted here.
if (m_ancestorClippingLayer) {
m_ancestorClippingLayer->removeAllChildren();
m_graphicsLayer->removeFromParent();
m_ancestorClippingLayer->addChild(m_graphicsLayer.get());
}
if (m_clippingLayer) {
m_clippingLayer->removeFromParent();
m_graphicsLayer->addChild(m_clippingLayer.get());
// The clip for child layers does not include space for overflow controls, so they exist as
// siblings of the clipping layer if we have one. Normal children of this layer are set as
// children of the clipping layer.
if (m_layerForHorizontalScrollbar) {
m_layerForHorizontalScrollbar->removeFromParent();
m_graphicsLayer->addChild(m_layerForHorizontalScrollbar.get());
}
if (m_layerForVerticalScrollbar) {
m_layerForVerticalScrollbar->removeFromParent();
m_graphicsLayer->addChild(m_layerForVerticalScrollbar.get());
}
if (m_layerForScrollCorner) {
m_layerForScrollCorner->removeFromParent();
m_graphicsLayer->addChild(m_layerForScrollCorner.get());
}
}
}
void RenderLayerBacking::updateDrawsContent()
{
m_graphicsLayer->setDrawsContent(containsPaintedContent());
}
// Return true if the layers changed.
bool RenderLayerBacking::updateClippingLayers(bool needsAncestorClip, bool needsDescendantClip)
{
bool layersChanged = false;
if (needsAncestorClip) {
if (!m_ancestorClippingLayer) {
m_ancestorClippingLayer = GraphicsLayer::create(this);
#ifndef NDEBUG
m_ancestorClippingLayer->setName("Ancestor clipping Layer");
#endif
m_ancestorClippingLayer->setMasksToBounds(true);
layersChanged = true;
}
} else if (m_ancestorClippingLayer) {
m_ancestorClippingLayer->removeFromParent();
m_ancestorClippingLayer = 0;
layersChanged = true;
}
if (needsDescendantClip) {
if (!m_clippingLayer) {
m_clippingLayer = GraphicsLayer::create(this);
#ifndef NDEBUG
m_clippingLayer->setName("Child clipping Layer");
#endif
m_clippingLayer->setMasksToBounds(true);
layersChanged = true;
}
} else if (m_clippingLayer) {
m_clippingLayer->removeFromParent();
m_clippingLayer = 0;
layersChanged = true;
}
return layersChanged;
}
bool RenderLayerBacking::requiresHorizontalScrollbarLayer() const
{
#if !PLATFORM(CHROMIUM)
if (!m_owningLayer->hasOverlayScrollbars())
return false;
#endif
return m_owningLayer->horizontalScrollbar();
}
bool RenderLayerBacking::requiresVerticalScrollbarLayer() const
{
#if !PLATFORM(CHROMIUM)
if (!m_owningLayer->hasOverlayScrollbars())
return false;
#endif
return m_owningLayer->verticalScrollbar();
}
bool RenderLayerBacking::requiresScrollCornerLayer() const
{
#if !PLATFORM(CHROMIUM)
if (!m_owningLayer->hasOverlayScrollbars())
return false;
#endif
return !m_owningLayer->scrollCornerAndResizerRect().isEmpty();
}
bool RenderLayerBacking::updateOverflowControlsLayers(bool needsHorizontalScrollbarLayer, bool needsVerticalScrollbarLayer, bool needsScrollCornerLayer)
{
bool layersChanged = false;
if (needsHorizontalScrollbarLayer) {
if (!m_layerForHorizontalScrollbar) {
m_layerForHorizontalScrollbar = GraphicsLayer::create(this);
#ifndef NDEBUG
m_layerForHorizontalScrollbar ->setName("horizontal scrollbar");
#endif
layersChanged = true;
}
} else if (m_layerForHorizontalScrollbar) {
m_layerForHorizontalScrollbar.clear();
layersChanged = true;
}
if (needsVerticalScrollbarLayer) {
if (!m_layerForVerticalScrollbar) {
m_layerForVerticalScrollbar = GraphicsLayer::create(this);
#ifndef NDEBUG
m_layerForVerticalScrollbar->setName("vertical scrollbar");
#endif
layersChanged = true;
}
} else if (m_layerForVerticalScrollbar) {
m_layerForVerticalScrollbar.clear();
layersChanged = true;
}
if (needsScrollCornerLayer) {
if (!m_layerForScrollCorner) {
m_layerForScrollCorner = GraphicsLayer::create(this);
#ifndef NDEBUG
m_layerForScrollCorner->setName("scroll corner");
#endif
layersChanged = true;
}
} else if (m_layerForScrollCorner) {
m_layerForScrollCorner.clear();
layersChanged = true;
}
return layersChanged;
}
bool RenderLayerBacking::updateForegroundLayer(bool needsForegroundLayer)
{
bool layerChanged = false;
if (needsForegroundLayer) {
if (!m_foregroundLayer) {
m_foregroundLayer = GraphicsLayer::create(this);
#ifndef NDEBUG
m_foregroundLayer->setName(nameForLayer() + " (foreground)");
#endif
m_foregroundLayer->setDrawsContent(true);
m_foregroundLayer->setPaintingPhase(GraphicsLayerPaintForeground);
if (Frame* frame = renderer()->document()->frame())
m_foregroundLayer->setContentsScale(frame->pageScaleFactor());
layerChanged = true;
}
} else if (m_foregroundLayer) {
m_foregroundLayer->removeFromParent();
m_foregroundLayer = 0;
layerChanged = true;
}
if (layerChanged)
m_graphicsLayer->setPaintingPhase(paintingPhaseForPrimaryLayer());
return layerChanged;
}
bool RenderLayerBacking::updateMaskLayer(bool needsMaskLayer)
{
bool layerChanged = false;
if (needsMaskLayer) {
if (!m_maskLayer) {
m_maskLayer = GraphicsLayer::create(this);
#ifndef NDEBUG
m_maskLayer->setName("Mask");
#endif
m_maskLayer->setDrawsContent(true);
m_maskLayer->setPaintingPhase(GraphicsLayerPaintMask);
if (Frame* frame = renderer()->document()->frame())
m_maskLayer->setContentsScale(frame->pageScaleFactor());
layerChanged = true;
}
} else if (m_maskLayer) {
m_maskLayer = 0;
layerChanged = true;
}
if (layerChanged)
m_graphicsLayer->setPaintingPhase(paintingPhaseForPrimaryLayer());
return layerChanged;
}
GraphicsLayerPaintingPhase RenderLayerBacking::paintingPhaseForPrimaryLayer() const
{
unsigned phase = GraphicsLayerPaintBackground;
if (!m_foregroundLayer)
phase |= GraphicsLayerPaintForeground;
if (!m_maskLayer)
phase |= GraphicsLayerPaintMask;
return static_cast<GraphicsLayerPaintingPhase>(phase);
}
float RenderLayerBacking::compositingOpacity(float rendererOpacity) const
{
float finalOpacity = rendererOpacity;
for (RenderLayer* curr = m_owningLayer->parent(); curr; curr = curr->parent()) {
// We only care about parents that are stacking contexts.
// Recall that opacity creates stacking context.
if (!curr->isStackingContext())
continue;
// If we found a compositing layer, we want to compute opacity
// relative to it. So we can break here.
if (curr->isComposited())
break;
finalOpacity *= curr->renderer()->opacity();
}
return finalOpacity;
}
static bool hasBorderOutlineOrShadow(const RenderStyle* style)
{
return style->hasBorder() || style->hasBorderRadius() || style->hasOutline() || style->hasAppearance() || style->boxShadow();
}
static bool hasBoxDecorationsOrBackground(const RenderObject* renderer)
{
return hasBorderOutlineOrShadow(renderer->style()) || renderer->hasBackground();
}
static bool hasBoxDecorationsOrBackgroundImage(const RenderStyle* style)
{
return hasBorderOutlineOrShadow(style) || style->hasBackgroundImage();
}
bool RenderLayerBacking::rendererHasBackground() const
{
// FIXME: share more code here
if (renderer()->node() && renderer()->node()->isDocumentNode()) {
RenderObject* htmlObject = renderer()->firstChild();
if (!htmlObject)
return false;
if (htmlObject->hasBackground())
return true;
RenderObject* bodyObject = htmlObject->firstChild();
if (!bodyObject)
return false;
return bodyObject->hasBackground();
}
return renderer()->hasBackground();
}
const Color RenderLayerBacking::rendererBackgroundColor() const
{
// FIXME: share more code here
if (renderer()->node() && renderer()->node()->isDocumentNode()) {
RenderObject* htmlObject = renderer()->firstChild();
if (htmlObject->hasBackground())
return htmlObject->style()->visitedDependentColor(CSSPropertyBackgroundColor);
RenderObject* bodyObject = htmlObject->firstChild();
return bodyObject->style()->visitedDependentColor(CSSPropertyBackgroundColor);
}
return renderer()->style()->visitedDependentColor(CSSPropertyBackgroundColor);
}
// A "simple container layer" is a RenderLayer which has no visible content to render.
// It may have no children, or all its children may be themselves composited.
// This is a useful optimization, because it allows us to avoid allocating backing store.
bool RenderLayerBacking::isSimpleContainerCompositingLayer() const
{
RenderObject* renderObject = renderer();
if (renderObject->isReplaced() || // replaced objects are not containers
renderObject->hasMask()) // masks require special treatment
return false;
RenderStyle* style = renderObject->style();
// Reject anything that has a border, a border-radius or outline,
// or any background (color or image).
// FIXME: we could optimize layers for simple backgrounds.
if (hasBoxDecorationsOrBackground(renderObject))
return false;
if (m_owningLayer->hasOverflowControls())
return false;
// If we have got this far and the renderer has no children, then we're ok.
if (!renderObject->firstChild())
return true;
if (renderObject->node() && renderObject->node()->isDocumentNode()) {
// Look to see if the root object has a non-simple backgound
RenderObject* rootObject = renderObject->document()->documentElement()->renderer();
if (!rootObject)
return false;
style = rootObject->style();
// Reject anything that has a border, a border-radius or outline,
// or is not a simple background (no background, or solid color).
if (hasBoxDecorationsOrBackgroundImage(style))
return false;
// Now look at the body's renderer.
HTMLElement* body = renderObject->document()->body();
RenderObject* bodyObject = (body && body->hasLocalName(bodyTag)) ? body->renderer() : 0;
if (!bodyObject)
return false;
style = bodyObject->style();
if (hasBoxDecorationsOrBackgroundImage(style))
return false;
// Check to see if all the body's children are compositing layers.
if (hasNonCompositingDescendants())
return false;
return true;
}
// Check to see if all the renderer's children are compositing layers.
if (hasNonCompositingDescendants())
return false;
return true;
}
// Conservative test for having no rendered children.
bool RenderLayerBacking::hasNonCompositingDescendants() const
{
// Some HTML can cause whitespace text nodes to have renderers, like:
// <div>
// <img src=...>
// </div>
// so test for 0x0 RenderTexts here
for (RenderObject* child = renderer()->firstChild(); child; child = child->nextSibling()) {
if (!child->hasLayer()) {
if (child->isRenderInline() || !child->isBox())
return true;
if (toRenderBox(child)->width() > 0 || toRenderBox(child)->height() > 0)
return true;
}
}
if (m_owningLayer->isStackingContext()) {
// Use the m_hasCompositingDescendant bit to optimize?
if (Vector<RenderLayer*>* negZOrderList = m_owningLayer->negZOrderList()) {
size_t listSize = negZOrderList->size();
for (size_t i = 0; i < listSize; ++i) {
RenderLayer* curLayer = negZOrderList->at(i);
if (!curLayer->isComposited())
return true;
}
}
if (Vector<RenderLayer*>* posZOrderList = m_owningLayer->posZOrderList()) {
size_t listSize = posZOrderList->size();
for (size_t i = 0; i < listSize; ++i) {
RenderLayer* curLayer = posZOrderList->at(i);
if (!curLayer->isComposited())
return true;
}
}
}
if (Vector<RenderLayer*>* normalFlowList = m_owningLayer->normalFlowList()) {
size_t listSize = normalFlowList->size();
for (size_t i = 0; i < listSize; ++i) {
RenderLayer* curLayer = normalFlowList->at(i);
if (!curLayer->isComposited())
return true;
}
}
return false;
}
bool RenderLayerBacking::containsPaintedContent() const
{
if (isSimpleContainerCompositingLayer() || paintingGoesToWindow() || m_artificiallyInflatedBounds || m_owningLayer->isReflection())
return false;
if (isDirectlyCompositedImage())
return false;
// FIXME: we could optimize cases where the image, video or canvas is known to fill the border box entirely,
// and set background color on the layer in that case, instead of allocating backing store and painting.
#if ENABLE(VIDEO)
if (renderer()->isVideo() && toRenderVideo(renderer())->shouldDisplayVideo())
return hasBoxDecorationsOrBackground(renderer());
#endif
#if PLATFORM(MAC) && USE(CA) && !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_SNOW_LEOPARD)
#elif ENABLE(WEBGL) || ENABLE(ACCELERATED_2D_CANVAS)
if (isAcceleratedCanvas(renderer()))
return hasBoxDecorationsOrBackground(renderer());
#endif
return true;
}
// An image can be directly compositing if it's the sole content of the layer, and has no box decorations
// that require painting. Direct compositing saves backing store.
bool RenderLayerBacking::isDirectlyCompositedImage() const
{
RenderObject* renderObject = renderer();
if (!renderObject->isImage() || hasBoxDecorationsOrBackground(renderObject) || renderObject->hasClip())
return false;
RenderImage* imageRenderer = toRenderImage(renderObject);
if (CachedImage* cachedImage = imageRenderer->cachedImage()) {
if (cachedImage->hasImage())
return cachedImage->image()->isBitmapImage();
}
return false;
}
void RenderLayerBacking::contentChanged(RenderLayer::ContentChangeType changeType)
{
if ((changeType == RenderLayer::ImageChanged) && isDirectlyCompositedImage()) {
updateImageContents();
return;
}
if ((changeType == RenderLayer::MaskImageChanged) && m_maskLayer) {
// The composited layer bounds relies on box->maskClipRect(), which changes
// when the mask image becomes available.
bool isUpdateRoot = true;
updateAfterLayout(CompositingChildren, isUpdateRoot);
}
#if ENABLE(WEBGL) || ENABLE(ACCELERATED_2D_CANVAS)
if ((changeType == RenderLayer::CanvasChanged) && isAcceleratedCanvas(renderer())) {
m_graphicsLayer->setContentsNeedsDisplay();
return;
}
#endif
}
void RenderLayerBacking::updateImageContents()
{
ASSERT(renderer()->isImage());
RenderImage* imageRenderer = toRenderImage(renderer());
CachedImage* cachedImage = imageRenderer->cachedImage();
if (!cachedImage)
return;
Image* image = cachedImage->image();
if (!image)
return;
// We have to wait until the image is fully loaded before setting it on the layer.
if (!cachedImage->isLoaded())
return;
// This is a no-op if the layer doesn't have an inner layer for the image.
m_graphicsLayer->setContentsToImage(image);
// Image animation is "lazy", in that it automatically stops unless someone is drawing
// the image. So we have to kick the animation each time; this has the downside that the
// image will keep animating, even if its layer is not visible.
image->startAnimation();
}
FloatPoint3D RenderLayerBacking::computeTransformOrigin(const IntRect& borderBox) const
{
RenderStyle* style = renderer()->style();
FloatPoint3D origin;
origin.setX(style->transformOriginX().calcFloatValue(borderBox.width()));
origin.setY(style->transformOriginY().calcFloatValue(borderBox.height()));
origin.setZ(style->transformOriginZ());
return origin;
}
FloatPoint RenderLayerBacking::computePerspectiveOrigin(const IntRect& borderBox) const
{
RenderStyle* style = renderer()->style();
float boxWidth = borderBox.width();
float boxHeight = borderBox.height();
FloatPoint origin;
origin.setX(style->perspectiveOriginX().calcFloatValue(boxWidth));
origin.setY(style->perspectiveOriginY().calcFloatValue(boxHeight));
return origin;
}
// Return the offset from the top-left of this compositing layer at which the renderer's contents are painted.
IntSize RenderLayerBacking::contentOffsetInCompostingLayer() const
{
return IntSize(-m_compositedBounds.x(), -m_compositedBounds.y());
}
IntRect RenderLayerBacking::contentsBox() const
{
if (!renderer()->isBox())
return IntRect();
IntRect contentsRect;
#if ENABLE(VIDEO)
if (renderer()->isVideo()) {
RenderVideo* videoRenderer = toRenderVideo(renderer());
contentsRect = videoRenderer->videoBox();
} else
#endif
contentsRect = toRenderBox(renderer())->contentBoxRect();
IntSize contentOffset = contentOffsetInCompostingLayer();
contentsRect.move(contentOffset);
return contentsRect;
}
bool RenderLayerBacking::paintingGoesToWindow() const
{
if (m_owningLayer->isRootLayer())
return compositor()->rootLayerAttachment() != RenderLayerCompositor::RootLayerAttachedViaEnclosingFrame;
return false;
}
void RenderLayerBacking::setContentsNeedDisplay()
{
if (m_graphicsLayer && m_graphicsLayer->drawsContent())
m_graphicsLayer->setNeedsDisplay();
if (m_foregroundLayer && m_foregroundLayer->drawsContent())
m_foregroundLayer->setNeedsDisplay();
if (m_maskLayer && m_maskLayer->drawsContent())
m_maskLayer->setNeedsDisplay();
}
// r is in the coordinate space of the layer's render object
void RenderLayerBacking::setContentsNeedDisplayInRect(const IntRect& r)
{
if (m_graphicsLayer && m_graphicsLayer->drawsContent()) {
IntRect layerDirtyRect = r;
layerDirtyRect.move(-m_graphicsLayer->offsetFromRenderer());
m_graphicsLayer->setNeedsDisplayInRect(layerDirtyRect);
}
if (m_foregroundLayer && m_foregroundLayer->drawsContent()) {
IntRect layerDirtyRect = r;
layerDirtyRect.move(-m_foregroundLayer->offsetFromRenderer());
m_foregroundLayer->setNeedsDisplayInRect(layerDirtyRect);
}
if (m_maskLayer && m_maskLayer->drawsContent()) {
IntRect layerDirtyRect = r;
layerDirtyRect.move(-m_maskLayer->offsetFromRenderer());
m_maskLayer->setNeedsDisplayInRect(layerDirtyRect);
}
}
static void setClip(GraphicsContext* p, const IntRect& paintDirtyRect, const IntRect& clipRect)
{
if (paintDirtyRect == clipRect)
return;
p->save();
p->clip(clipRect);
}
static void restoreClip(GraphicsContext* p, const IntRect& paintDirtyRect, const IntRect& clipRect)
{
if (paintDirtyRect == clipRect)
return;
p->restore();
}
// Share this with RenderLayer::paintLayer, which would have to be educated about GraphicsLayerPaintingPhase?
void RenderLayerBacking::paintIntoLayer(RenderLayer* rootLayer, GraphicsContext* context,
const IntRect& paintDirtyRect, // in the coords of rootLayer
PaintBehavior paintBehavior, GraphicsLayerPaintingPhase paintingPhase,
RenderObject* paintingRoot)
{
if (paintingGoesToWindow()) {
ASSERT_NOT_REACHED();
return;
}
m_owningLayer->updateLayerListsIfNeeded();
// Calculate the clip rects we should use.
IntRect layerBounds, damageRect, clipRectToApply, outlineRect;
m_owningLayer->calculateRects(rootLayer, paintDirtyRect, layerBounds, damageRect, clipRectToApply, outlineRect);
int x = layerBounds.x(); // layerBounds is computed relative to rootLayer
int y = layerBounds.y();
int tx = x - m_owningLayer->renderBoxX();
int ty = y - m_owningLayer->renderBoxY();
// If this layer's renderer is a child of the paintingRoot, we render unconditionally, which
// is done by passing a nil paintingRoot down to our renderer (as if no paintingRoot was ever set).
// Else, our renderer tree may or may not contain the painting root, so we pass that root along
// so it will be tested against as we decend through the renderers.
RenderObject *paintingRootForRenderer = 0;
if (paintingRoot && !renderer()->isDescendantOf(paintingRoot))
paintingRootForRenderer = paintingRoot;
bool shouldPaint = (m_owningLayer->hasVisibleContent() || m_owningLayer->hasVisibleDescendant()) && m_owningLayer->isSelfPaintingLayer();
#if PLATFORM(ANDROID)
if (shouldPaint && ((paintingPhase & GraphicsLayerPaintBackground)
|| (paintingPhase & GraphicsLayerPaintBackgroundDecorations))) {
#else
if (shouldPaint && (paintingPhase & GraphicsLayerPaintBackground)) {
#endif
// Paint our background first, before painting any child layers.
// Establish the clip used to paint our background.
setClip(context, paintDirtyRect, damageRect);
#if PLATFORM(ANDROID)
PaintPhase phase = PaintPhaseBlockBackground;
if (paintingPhase & GraphicsLayerPaintBackgroundDecorations)
phase = PaintPhaseBlockBackgroundDecorations;
PaintInfo info(context, damageRect, phase, false, paintingRootForRenderer, 0);
#else
PaintInfo info(context, damageRect, PaintPhaseBlockBackground, false, paintingRootForRenderer, 0);
#endif
renderer()->paint(info, tx, ty);
// Our scrollbar widgets paint exactly when we tell them to, so that they work properly with
// z-index. We paint after we painted the background/border, so that the scrollbars will
// sit above the background/border.
m_owningLayer->paintOverflowControls(context, x, y, damageRect);
// Restore the clip.
restoreClip(context, paintDirtyRect, damageRect);
#if ENABLE(ANDROID_OVERFLOW_SCROLL)
// Paint the outline as part of the background phase in order for the
// outline to not be a part of the scrollable content.
if (!outlineRect.isEmpty()) {
// Paint our own outline
PaintInfo paintInfo(context, outlineRect, PaintPhaseSelfOutline, false, paintingRootForRenderer, 0);
setClip(context, paintDirtyRect, outlineRect);
renderer()->paint(paintInfo, tx, ty);
restoreClip(context, paintDirtyRect, outlineRect);
}
#endif
// Now walk the sorted list of children with negative z-indices. Only RenderLayers without compositing layers will paint.
m_owningLayer->paintList(m_owningLayer->negZOrderList(), rootLayer, context, paintDirtyRect, paintBehavior, paintingRoot, 0, 0);
}
bool forceBlackText = paintBehavior & PaintBehaviorForceBlackText;
bool selectionOnly = paintBehavior & PaintBehaviorSelectionOnly;
if (shouldPaint && (paintingPhase & GraphicsLayerPaintForeground)) {
// Set up the clip used when painting our children.
setClip(context, paintDirtyRect, clipRectToApply);
PaintInfo paintInfo(context, clipRectToApply,
selectionOnly ? PaintPhaseSelection : PaintPhaseChildBlockBackgrounds,
forceBlackText, paintingRootForRenderer, 0);
renderer()->paint(paintInfo, tx, ty);
if (!selectionOnly) {
paintInfo.phase = PaintPhaseFloat;
renderer()->paint(paintInfo, tx, ty);
paintInfo.phase = PaintPhaseForeground;
renderer()->paint(paintInfo, tx, ty);
paintInfo.phase = PaintPhaseChildOutlines;
renderer()->paint(paintInfo, tx, ty);
}
// Now restore our clip.
restoreClip(context, paintDirtyRect, clipRectToApply);
#if !ENABLE(ANDROID_OVERFLOW_SCROLL)
// Do not paint the outline as part of the foreground since it will
// appear inside the scrollable content.
if (!outlineRect.isEmpty()) {
// Paint our own outline
PaintInfo paintInfo(context, outlineRect, PaintPhaseSelfOutline, false, paintingRootForRenderer, 0);
setClip(context, paintDirtyRect, outlineRect);
renderer()->paint(paintInfo, tx, ty);
restoreClip(context, paintDirtyRect, outlineRect);
}
#endif
// Paint any child layers that have overflow.
m_owningLayer->paintList(m_owningLayer->normalFlowList(), rootLayer, context, paintDirtyRect, paintBehavior, paintingRoot, 0, 0);
// Now walk the sorted list of children with positive z-indices.
m_owningLayer->paintList(m_owningLayer->posZOrderList(), rootLayer, context, paintDirtyRect, paintBehavior, paintingRoot, 0, 0);
}
if (shouldPaint && (paintingPhase & GraphicsLayerPaintMask)) {
if (renderer()->hasMask() && !selectionOnly && !damageRect.isEmpty()) {
setClip(context, paintDirtyRect, damageRect);
// Paint the mask.
PaintInfo paintInfo(context, damageRect, PaintPhaseMask, false, paintingRootForRenderer, 0);
renderer()->paint(paintInfo, tx, ty);
// Restore the clip.
restoreClip(context, paintDirtyRect, damageRect);
}
}
ASSERT(!m_owningLayer->m_usedTransparency);
}
static void paintScrollbar(Scrollbar* scrollbar, GraphicsContext& context, const IntRect& clip)
{
if (!scrollbar)
return;
context.save();
const IntRect& scrollbarRect = scrollbar->frameRect();
context.translate(-scrollbarRect.x(), -scrollbarRect.y());
IntRect transformedClip = clip;
transformedClip.move(scrollbarRect.x(), scrollbarRect.y());
scrollbar->paint(&context, transformedClip);
context.restore();
}
// Up-call from compositing layer drawing callback.
void RenderLayerBacking::paintContents(const GraphicsLayer* graphicsLayer, GraphicsContext& context, GraphicsLayerPaintingPhase paintingPhase, const IntRect& clip)
{
if (graphicsLayer == m_graphicsLayer.get() || graphicsLayer == m_foregroundLayer.get() || graphicsLayer == m_maskLayer.get()) {
InspectorInstrumentationCookie cookie = InspectorInstrumentation::willPaint(m_owningLayer->renderer()->frame(), clip);
IntSize offset = graphicsLayer->offsetFromRenderer();
context.translate(-offset);
IntRect clipRect(clip);
clipRect.move(offset);
// The dirtyRect is in the coords of the painting root.
IntRect dirtyRect = compositedBounds();
dirtyRect.intersect(clipRect);
#if ENABLE(ANDROID_OVERFLOW_SCROLL)
// If we encounter a scrollable layer, layers inside the scrollable layer
// will need their entire content recorded.
if (m_owningLayer->hasOverflowParent())
dirtyRect.setSize(clip.size());
#endif
// We have to use the same root as for hit testing, because both methods can compute and cache clipRects.
paintIntoLayer(m_owningLayer, &context, dirtyRect, PaintBehaviorNormal, paintingPhase, renderer());
InspectorInstrumentation::didPaint(cookie);
} else if (graphicsLayer == layerForHorizontalScrollbar()) {
paintScrollbar(m_owningLayer->horizontalScrollbar(), context, clip);
} else if (graphicsLayer == layerForVerticalScrollbar()) {
paintScrollbar(m_owningLayer->verticalScrollbar(), context, clip);
} else if (graphicsLayer == layerForScrollCorner()) {
const IntRect& scrollCornerAndResizer = m_owningLayer->scrollCornerAndResizerRect();
context.save();
context.translate(-scrollCornerAndResizer.x(), -scrollCornerAndResizer.y());
IntRect transformedClip = clip;
transformedClip.move(scrollCornerAndResizer.x(), scrollCornerAndResizer.y());
m_owningLayer->paintScrollCorner(&context, 0, 0, transformedClip);
m_owningLayer->paintResizer(&context, 0, 0, transformedClip);
context.restore();
}
}
bool RenderLayerBacking::showDebugBorders() const
{
return compositor() ? compositor()->compositorShowDebugBorders() : false;
}
bool RenderLayerBacking::showRepaintCounter() const
{
return compositor() ? compositor()->compositorShowRepaintCounter() : false;
}
bool RenderLayerBacking::startAnimation(double timeOffset, const Animation* anim, const KeyframeList& keyframes)
{
bool hasOpacity = keyframes.containsProperty(CSSPropertyOpacity);
bool hasTransform = renderer()->isBox() && keyframes.containsProperty(CSSPropertyWebkitTransform);
if (!hasOpacity && !hasTransform)
return false;
KeyframeValueList transformVector(AnimatedPropertyWebkitTransform);
KeyframeValueList opacityVector(AnimatedPropertyOpacity);
size_t numKeyframes = keyframes.size();
for (size_t i = 0; i < numKeyframes; ++i) {
const KeyframeValue& currentKeyframe = keyframes[i];
const RenderStyle* keyframeStyle = currentKeyframe.style();
float key = currentKeyframe.key();
if (!keyframeStyle)
continue;
// Get timing function.
RefPtr<TimingFunction> tf = keyframeStyle->hasAnimations() ? (*keyframeStyle->animations()).animation(0)->timingFunction() : 0;
bool isFirstOrLastKeyframe = key == 0 || key == 1;
if ((hasTransform && isFirstOrLastKeyframe) || currentKeyframe.containsProperty(CSSPropertyWebkitTransform))
transformVector.insert(new TransformAnimationValue(key, &(keyframeStyle->transform()), tf));
if ((hasOpacity && isFirstOrLastKeyframe) || currentKeyframe.containsProperty(CSSPropertyOpacity))
opacityVector.insert(new FloatAnimationValue(key, keyframeStyle->opacity(), tf));
}
bool didAnimateTransform = false;
bool didAnimateOpacity = false;
if (hasTransform && m_graphicsLayer->addAnimation(transformVector, toRenderBox(renderer())->borderBoxRect().size(), anim, keyframes.animationName(), timeOffset)) {
didAnimateTransform = true;
compositor()->didStartAcceleratedAnimation(CSSPropertyWebkitTransform);
}
if (hasOpacity && m_graphicsLayer->addAnimation(opacityVector, IntSize(), anim, keyframes.animationName(), timeOffset)) {
didAnimateOpacity = true;
compositor()->didStartAcceleratedAnimation(CSSPropertyOpacity);
}
return didAnimateTransform || didAnimateOpacity;
}
void RenderLayerBacking::animationPaused(double timeOffset, const String& animationName)
{
m_graphicsLayer->pauseAnimation(animationName, timeOffset);
}
void RenderLayerBacking::animationFinished(const String& animationName)
{
m_graphicsLayer->removeAnimation(animationName);
}
bool RenderLayerBacking::startTransition(double timeOffset, int property, const RenderStyle* fromStyle, const RenderStyle* toStyle)
{
bool didAnimateOpacity = false;
bool didAnimateTransform = false;
ASSERT(property != cAnimateAll);
if (property == (int)CSSPropertyOpacity) {
const Animation* opacityAnim = toStyle->transitionForProperty(CSSPropertyOpacity);
if (opacityAnim && !opacityAnim->isEmptyOrZeroDuration()) {
KeyframeValueList opacityVector(AnimatedPropertyOpacity);
opacityVector.insert(new FloatAnimationValue(0, compositingOpacity(fromStyle->opacity())));
opacityVector.insert(new FloatAnimationValue(1, compositingOpacity(toStyle->opacity())));
// The boxSize param is only used for transform animations (which can only run on RenderBoxes), so we pass an empty size here.
if (m_graphicsLayer->addAnimation(opacityVector, IntSize(), opacityAnim, GraphicsLayer::animationNameForTransition(AnimatedPropertyOpacity), timeOffset)) {
// To ensure that the correct opacity is visible when the animation ends, also set the final opacity.
updateLayerOpacity(toStyle);
didAnimateOpacity = true;
}
}
}
if (property == (int)CSSPropertyWebkitTransform && m_owningLayer->hasTransform()) {
const Animation* transformAnim = toStyle->transitionForProperty(CSSPropertyWebkitTransform);
if (transformAnim && !transformAnim->isEmptyOrZeroDuration()) {
KeyframeValueList transformVector(AnimatedPropertyWebkitTransform);
transformVector.insert(new TransformAnimationValue(0, &fromStyle->transform()));
transformVector.insert(new TransformAnimationValue(1, &toStyle->transform()));
if (m_graphicsLayer->addAnimation(transformVector, toRenderBox(renderer())->borderBoxRect().size(), transformAnim, GraphicsLayer::animationNameForTransition(AnimatedPropertyWebkitTransform), timeOffset)) {
// To ensure that the correct transform is visible when the animation ends, also set the final opacity.
updateLayerTransform(toStyle);
didAnimateTransform = true;
}
}
}
if (didAnimateOpacity)
compositor()->didStartAcceleratedAnimation(CSSPropertyOpacity);
if (didAnimateTransform)
compositor()->didStartAcceleratedAnimation(CSSPropertyWebkitTransform);
return didAnimateOpacity || didAnimateTransform;
}
void RenderLayerBacking::transitionPaused(double timeOffset, int property)
{
AnimatedPropertyID animatedProperty = cssToGraphicsLayerProperty(property);
if (animatedProperty != AnimatedPropertyInvalid)
m_graphicsLayer->pauseAnimation(GraphicsLayer::animationNameForTransition(animatedProperty), timeOffset);
}
void RenderLayerBacking::transitionFinished(int property)
{
AnimatedPropertyID animatedProperty = cssToGraphicsLayerProperty(property);
if (animatedProperty != AnimatedPropertyInvalid)
m_graphicsLayer->removeAnimation(GraphicsLayer::animationNameForTransition(animatedProperty));
}
void RenderLayerBacking::notifyAnimationStarted(const GraphicsLayer*, double time)
{
renderer()->animation()->notifyAnimationStarted(renderer(), time);
}
void RenderLayerBacking::notifySyncRequired(const GraphicsLayer*)
{
if (!renderer()->documentBeingDestroyed())
compositor()->scheduleLayerFlush();
}
// This is used for the 'freeze' API, for testing only.
void RenderLayerBacking::suspendAnimations(double time)
{
m_graphicsLayer->suspendAnimations(time);
}
void RenderLayerBacking::resumeAnimations()
{
m_graphicsLayer->resumeAnimations();
}
IntRect RenderLayerBacking::compositedBounds() const
{
return m_compositedBounds;
}
void RenderLayerBacking::setCompositedBounds(const IntRect& bounds)
{
m_compositedBounds = bounds;
}
int RenderLayerBacking::graphicsLayerToCSSProperty(AnimatedPropertyID property)
{
int cssProperty = CSSPropertyInvalid;
switch (property) {
case AnimatedPropertyWebkitTransform:
cssProperty = CSSPropertyWebkitTransform;
break;
case AnimatedPropertyOpacity:
cssProperty = CSSPropertyOpacity;
break;
case AnimatedPropertyBackgroundColor:
cssProperty = CSSPropertyBackgroundColor;
break;
case AnimatedPropertyInvalid:
ASSERT_NOT_REACHED();
}
return cssProperty;
}
AnimatedPropertyID RenderLayerBacking::cssToGraphicsLayerProperty(int cssProperty)
{
switch (cssProperty) {
case CSSPropertyWebkitTransform:
return AnimatedPropertyWebkitTransform;
case CSSPropertyOpacity:
return AnimatedPropertyOpacity;
case CSSPropertyBackgroundColor:
return AnimatedPropertyBackgroundColor;
// It's fine if we see other css properties here; they are just not accelerated.
}
return AnimatedPropertyInvalid;
}
#ifndef NDEBUG
String RenderLayerBacking::nameForLayer() const
{
String name = renderer()->renderName();
if (Node* node = renderer()->node()) {
if (node->isElementNode())
name += " " + static_cast<Element*>(node)->tagName();
if (node->hasID())
name += " \'" + static_cast<Element*>(node)->getIdAttribute() + "\'";
}
if (m_owningLayer->isReflection())
name += " (reflection)";
return name;
}
#endif
CompositingLayerType RenderLayerBacking::compositingLayerType() const
{
if (m_graphicsLayer->hasContentsLayer())
return MediaCompositingLayer;
if (m_graphicsLayer->drawsContent())
return m_graphicsLayer->usingTiledLayer() ? TiledCompositingLayer : NormalCompositingLayer;
return ContainerCompositingLayer;
}
void RenderLayerBacking::updateContentsScale(float scale)
{
if (m_graphicsLayer)
m_graphicsLayer->setContentsScale(scale);
if (m_foregroundLayer)
m_foregroundLayer->setContentsScale(scale);
if (m_maskLayer)
m_maskLayer->setContentsScale(scale);
}
} // namespace WebCore
#endif // USE(ACCELERATED_COMPOSITING)