void PannerNode::setPosition(float x, float y, float z)
{
FloatPoint3D position = FloatPoint3D(x, y, z);
if (m_position == position)
return;
// This synchronizes with process().
MutexLocker processLocker(m_processLock);
m_position = position;
markPannerAsDirty(PannerNode::AzimuthElevationDirty | PannerNode::DistanceConeGainDirty | PannerNode::DopplerRateDirty);
}
void PannerNode::setOrientation(float x, float y, float z)
{
FloatPoint3D orientation = FloatPoint3D(x, y, z);
if (m_orientation == orientation)
return;
// This synchronizes with process().
MutexLocker processLocker(m_processLock);
m_orientation = orientation;
markPannerAsDirty(PannerNode::DistanceConeGainDirty);
}
TEST_F(PaintPropertyTreeBuilderTest, Transform)
{
loadTestData("transform.html");
Element* transform = document().getElementById("transform");
ObjectPaintProperties* transformProperties = transform->layoutObject()->objectPaintProperties();
EXPECT_EQ(TransformationMatrix().translate3d(123, 456, 789), transformProperties->transform()->matrix());
EXPECT_EQ(FloatPoint3D(200, 150, 0), transformProperties->transform()->origin());
EXPECT_EQ(transformProperties->paintOffsetTranslation(), transformProperties->transform()->parent());
EXPECT_EQ(TransformationMatrix().translate(50, 100), transformProperties->paintOffsetTranslation()->matrix());
EXPECT_EQ(document().view()->scrollTranslation(), transformProperties->paintOffsetTranslation()->parent());
}
TEST(TransformationMatrixTest, ApplyTransformOrigin) {
TransformationMatrix matrix;
// (0,0,0) is a fixed point of this scale.
// (1,1,1) should be scaled appropriately.
matrix.scale3d(2, 3, 4);
EXPECT_EQ(FloatPoint3D(0, 0, 0), matrix.mapPoint(FloatPoint3D(0, 0, 0)));
EXPECT_EQ(FloatPoint3D(2, 3, -4), matrix.mapPoint(FloatPoint3D(1, 1, -1)));
// With the transform origin applied, (1,2,3) is the fixed point.
// (0,0,0) should be scaled according to its distance from (1,2,3).
matrix.applyTransformOrigin(1, 2, 3);
EXPECT_EQ(FloatPoint3D(1, 2, 3), matrix.mapPoint(FloatPoint3D(1, 2, 3)));
EXPECT_EQ(FloatPoint3D(-1, -4, -9), matrix.mapPoint(FloatPoint3D(0, 0, 0)));
}
void LayerTreeHostProxy::ensureRootLayer()
{
if (m_rootLayer)
return;
m_rootLayer = createLayer(InvalidWebLayerID);
m_rootLayer->setMasksToBounds(false);
m_rootLayer->setDrawsContent(false);
m_rootLayer->setAnchorPoint(FloatPoint3D(0, 0, 0));
// The root layer should not have zero size, or it would be optimized out.
m_rootLayer->setSize(FloatSize(1.0, 1.0));
m_textureMapper = TextureMapperGL::create();
toTextureMapperNode(m_rootLayer.get())->setTextureMapper(m_textureMapper.get());
}
static PassRefPtr<TransformPaintPropertyNode> createPaintOffsetTranslationIfNeeded(const LayoutBoxModelObject& object, PaintPropertyTreeBuilderContext& context)
{
// TODO(trchen): Eliminate PaintLayer dependency.
bool shouldCreatePaintOffsetTranslationNode = object.layer() && object.layer()->paintsWithTransform(GlobalPaintNormalPhase);
if (context.paintOffset == LayoutPoint() || !shouldCreatePaintOffsetTranslationNode)
return nullptr;
RefPtr<TransformPaintPropertyNode> newTransformNodeForPaintOffsetTranslation = TransformPaintPropertyNode::create(
TransformationMatrix().translate(context.paintOffset.x(), context.paintOffset.y()),
FloatPoint3D(), context.currentTransform);
context.currentTransform = newTransformNodeForPaintOffsetTranslation.get();
context.paintOffset = LayoutPoint();
return newTransformNodeForPaintOffsetTranslation.release();
}
PannerNode::PannerNode(float sampleRate) : AudioNode(sampleRate), m_panningModel(PanningMode::HRTF)
{
m_distanceEffect.reset(new DistanceEffect());
m_coneEffect.reset(new ConeEffect());
addInput(unique_ptr<AudioNodeInput>(new AudioNodeInput(this)));
addOutput(unique_ptr<AudioNodeOutput>(new AudioNodeOutput(this, 2)));
m_distanceGain = std::make_shared<AudioParam>("distanceGain", 1.0, 0.0, 1.0);
m_coneGain = std::make_shared<AudioParam>("coneGain", 1.0, 0.0, 1.0);
m_position = FloatPoint3D(0, 0, 0);
m_orientation = FloatPoint3D(1, 0, 0);
m_velocity = FloatPoint3D(0, 0, 0);
// Node-specific default mixing rules.
m_channelCount = 2;
m_channelCountMode = ChannelCountMode::ClampedMax;
m_channelInterpretation = ChannelInterpretation::Speakers;
setNodeType(NodeTypePanner);
initialize();
}
void TextureMapperNode::computeTransformations()
{
if (!m_transforms.dirty)
return;
m_transforms.dirty = false;
if ((m_size.isEmpty() && m_state.masksToBounds))
return;
TextureMapperNode* parent = m_parent;
computeLocalTransform();
m_transforms.target = TransformationMatrix(parent ? parent->m_transforms.forDescendants : TransformationMatrix()).multiply(m_transforms.local);
m_transforms.forDescendants = (m_layerType == ClipLayer ? TransformationMatrix() : m_transforms.target);
if (m_effectTarget)
return;
m_transforms.targetBoundingRect = IntRect(m_transforms.target.mapRect(entireRect()));
if (m_state.replicaLayer)
m_state.replicaLayer->computeTransformations();
flattenTo2DSpaceIfNecessary();
if (!m_state.backfaceVisibility && m_transforms.target.inverse().m33() < 0) {
m_state.visible = false;
return;
}
m_state.visible = true;
if (parent && parent->m_state.preserves3D)
m_transforms.centerZ = m_transforms.target.mapPoint(FloatPoint3D(m_size.width() / 2, m_size.height() / 2, 0)).z();
if (!m_children.size())
return;
if (m_state.childrenTransform.isIdentity())
return;
const FloatPoint centerPoint = FloatPoint(m_size.width() / 2, m_size.height() / 2);
if (m_transforms.perspectiveDirty)
m_transforms.perspective = TransformationMatrix()
.translate(centerPoint.x(), centerPoint.y())
.multiply(m_state.childrenTransform)
.translate(-centerPoint.x(), -centerPoint.y());
m_transforms.perspectiveDirty = false;
m_transforms.forDescendants.multiply(m_transforms.perspective);
}
void PaintPropertyTreeBuilder::updateSvgLocalToBorderBoxTransform(const LayoutObject& object, PaintPropertyTreeBuilderContext& context)
{
if (!object.isSVGRoot())
return;
AffineTransform transform = AffineTransform::translation(context.paintOffset.x().toFloat(), context.paintOffset.y().toFloat());
transform *= toLayoutSVGRoot(object).localToBorderBoxTransform();
if (transform.isIdentity())
return;
RefPtr<TransformPaintPropertyNode> svgLocalToBorderBoxTransform = TransformPaintPropertyNode::create(
transform, FloatPoint3D(0, 0, 0), context.currentTransform);
context.currentTransform = svgLocalToBorderBoxTransform.get();
context.paintOffset = LayoutPoint();
object.getMutableForPainting().ensureObjectPaintProperties().setSvgLocalToBorderBoxTransform(svgLocalToBorderBoxTransform.release());
}
void CoordinatedGraphicsScene::ensureRootLayer()
{
if (m_rootLayer)
return;
m_rootLayer = GraphicsLayer::create(0 /* factory */, this);
m_rootLayer->setMasksToBounds(false);
m_rootLayer->setDrawsContent(false);
m_rootLayer->setAnchorPoint(FloatPoint3D(0, 0, 0));
// The root layer should not have zero size, or it would be optimized out.
m_rootLayer->setSize(FloatSize(1.0, 1.0));
ASSERT(m_textureMapper);
toTextureMapperLayer(m_rootLayer.get())->setTextureMapper(m_textureMapper.get());
}
void PaintPropertyTreeBuilder::buildTreeRootNodes(FrameView& rootFrame, PaintPropertyTreeBuilderContext& context)
{
// Only create extra root clip and transform nodes when RLS is enabled, because the main frame
// unconditionally create frame translation / clip nodes otherwise.
if (rootFrame.frame().settings() && rootFrame.frame().settings()->rootLayerScrolls()) {
transformRoot = TransformPaintPropertyNode::create(TransformationMatrix(), FloatPoint3D(), nullptr);
context.currentTransform = context.transformForAbsolutePosition = context.transformForFixedPosition = transformRoot.get();
clipRoot = ClipPaintPropertyNode::create(transformRoot, FloatRoundedRect(LayoutRect::infiniteIntRect()), nullptr);
context.currentClip = context.clipForAbsolutePosition = context.clipForFixedPosition = clipRoot.get();
}
// The root frame never creates effect node so we unconditionally create a root node here.
effectRoot = EffectPaintPropertyNode::create(1.0, nullptr);
context.currentEffect = effectRoot.get();
}
void CoordinatedGraphicsScene::ensureRootLayer()
{
if (m_rootLayer)
return;
m_rootLayer = std::make_unique<TextureMapperLayer>();
m_rootLayer->setMasksToBounds(false);
m_rootLayer->setDrawsContent(false);
m_rootLayer->setAnchorPoint(FloatPoint3D(0, 0, 0));
// The root layer should not have zero size, or it would be optimized out.
m_rootLayer->setSize(FloatSize(1.0, 1.0));
ASSERT(m_textureMapper);
m_rootLayer->setTextureMapper(m_textureMapper.get());
}
// Returns the Z coordinate of a point on the given layer that projects
// to point p which lies on the z = 0 plane. It does it by computing the
// intersection of a line starting from p along the Z axis and the plane
// of the layer.
float CCLayerSorter::LayerIntersector::layerZFromProjectedPoint(GraphNode* layer, const FloatPoint& p)
{
const FloatPoint3D zAxis(0, 0, 1);
FloatPoint3D w = FloatPoint3D(p.x(), p.y(), 0) - layer->origin;
float d = layer->normal.dot(zAxis);
float n = -layer->normal.dot(w);
// Check if layer is parallel to the z = 0 axis
if (!d)
return layer->origin.z();
// The intersection point would be given by:
// p + (n / d) * u but since we are only interested in the
// z coordinate and p's z coord is zero, all we need is the value of n/d.
return n / d;
}
TEST_F(PaintPropertyTreeBuilderTest, Perspective)
{
loadTestData("perspective.html");
Element* perspective = document().getElementById("perspective");
ObjectPaintProperties* perspectiveProperties = perspective->layoutObject()->objectPaintProperties();
EXPECT_EQ(TransformationMatrix().applyPerspective(100), perspectiveProperties->perspective()->matrix());
// The perspective origin is the center of the border box plus accumulated paint offset.
EXPECT_EQ(FloatPoint3D(250, 250, 0), perspectiveProperties->perspective()->origin());
EXPECT_EQ(document().view()->scrollTranslation(), perspectiveProperties->perspective()->parent());
// Adding perspective doesn't clear paint offset. The paint offset will be passed down to children.
Element* inner = document().getElementById("inner");
ObjectPaintProperties* innerProperties = inner->layoutObject()->objectPaintProperties();
EXPECT_EQ(TransformationMatrix().translate(50, 100), innerProperties->paintOffsetTranslation()->matrix());
EXPECT_EQ(perspectiveProperties->perspective(), innerProperties->paintOffsetTranslation()->parent());
}
void PaintPropertyTreeBuilder::updateScrollAndScrollTranslation(
const LayoutObject& object,
PaintPropertyTreeBuilderContext& context) {
if (object.hasOverflowClip()) {
const LayoutBox& box = toLayoutBox(object);
const PaintLayerScrollableArea* scrollableArea = box.getScrollableArea();
IntSize scrollOffset = box.scrolledContentOffset();
if (!scrollOffset.isZero() || scrollableArea->scrollsOverflow()) {
TransformationMatrix matrix = TransformationMatrix().translate(
-scrollOffset.width(), -scrollOffset.height());
object.getMutableForPainting()
.ensurePaintProperties()
.updateScrollTranslation(
context.current.transform, matrix, FloatPoint3D(),
context.current.shouldFlattenInheritedTransform,
context.current.renderingContextID);
IntSize scrollClip = scrollableArea->visibleContentRect().size();
IntSize scrollBounds = scrollableArea->contentsSize();
bool userScrollableHorizontal =
scrollableArea->userInputScrollable(HorizontalScrollbar);
bool userScrollableVertical =
scrollableArea->userInputScrollable(VerticalScrollbar);
object.getMutableForPainting().ensurePaintProperties().updateScroll(
context.current.scroll, object.paintProperties()->scrollTranslation(),
scrollClip, scrollBounds, userScrollableHorizontal,
userScrollableVertical);
} else {
// Ensure pre-existing properties are cleared when there is no
// scrolling.
auto* properties = object.getMutableForPainting().paintProperties();
if (properties) {
properties->clearScrollTranslation();
properties->clearScroll();
}
}
}
if (object.paintProperties() && object.paintProperties()->scroll()) {
context.current.transform = object.paintProperties()->scrollTranslation();
const auto* scroll = object.paintProperties()->scroll();
// TODO(pdr): Remove this const cast.
context.current.scroll = const_cast<ScrollPaintPropertyNode*>(scroll);
context.current.shouldFlattenInheritedTransform = false;
}
}
static PassRefPtr<TransformPaintPropertyNode> createScrollTranslationIfNeeded(const LayoutObject& object, PaintPropertyTreeBuilderContext& context)
{
if (!object.isBoxModelObject() || !object.hasOverflowClip())
return nullptr;
PaintLayer* layer = toLayoutBoxModelObject(object).layer();
ASSERT(layer);
DoubleSize scrollOffset = layer->scrollableArea()->scrollOffset();
if (scrollOffset.isZero() && !layer->scrollsOverflow())
return nullptr;
RefPtr<TransformPaintPropertyNode> newTransformNodeForScrollTranslation = TransformPaintPropertyNode::create(
TransformationMatrix().translate(-scrollOffset.width(), -scrollOffset.height()),
FloatPoint3D(), context.currentTransform);
context.currentTransform = newTransformNodeForScrollTranslation.get();
return newTransformNodeForScrollTranslation.release();
}
void PaintPropertyTreeBuilder::updateScrollTranslation(const LayoutObject& object, PaintPropertyTreeBuilderContext& context)
{
if (!object.isBoxModelObject() || !object.hasOverflowClip())
return;
PaintLayer* layer = toLayoutBoxModelObject(object).layer();
ASSERT(layer);
DoubleSize scrollOffset = layer->getScrollableArea()->scrollOffset();
if (scrollOffset.isZero() && !layer->scrollsOverflow())
return;
RefPtr<TransformPaintPropertyNode> scrollTranslation = TransformPaintPropertyNode::create(
TransformationMatrix().translate(-scrollOffset.width(), -scrollOffset.height()),
FloatPoint3D(),
context.currentTransform);
context.currentTransform = scrollTranslation.get();
object.getMutableForPainting().ensureObjectPaintProperties().setScrollTranslation(scrollTranslation.release());
}
// Returns the Z coordinate of a point on the layer that projects
// to point p which lies on the z = 0 plane. It does it by computing the
// intersection of a line starting from p along the Z axis and the plane
// of the layer.
float CCLayerSorter::LayerShape::layerZFromProjectedPoint(const FloatPoint& p) const
{
const FloatPoint3D zAxis(0, 0, 1);
FloatPoint3D w = FloatPoint3D(p) - transformOrigin;
float d = layerNormal.dot(zAxis);
float n = -layerNormal.dot(w);
// Check if layer is parallel to the z = 0 axis which will make it
// invisible and hence returning zero is fine.
if (!d)
return 0;
// The intersection point would be given by:
// p + (n / d) * u but since we are only interested in the
// z coordinate and p's z coord is zero, all we need is the value of n/d.
return n / d;
}
// TODO(trchen): Remove this once we bake the paint offset into frameRect.
void PaintPropertyTreeBuilder::updateScrollbarPaintOffset(const LayoutObject& object, const PaintPropertyTreeBuilderContext& context)
{
IntPoint roundedPaintOffset = roundedIntPoint(context.paintOffset);
if (roundedPaintOffset == IntPoint())
return;
if (!object.isBoxModelObject())
return;
PaintLayerScrollableArea* scrollableArea = toLayoutBoxModelObject(object).getScrollableArea();
if (!scrollableArea)
return;
if (!scrollableArea->horizontalScrollbar() && !scrollableArea->verticalScrollbar())
return;
auto paintOffset = TransformationMatrix().translate(roundedPaintOffset.x(), roundedPaintOffset.y());
object.getMutableForPainting().ensureObjectPaintProperties().setScrollbarPaintOffset(
TransformPaintPropertyNode::create(paintOffset, FloatPoint3D(), context.currentTransform));
}
void PageOverlayController::installPageOverlay(PassRefPtr<PageOverlay> pageOverlay, PageOverlay::FadeMode fadeMode)
{
createRootLayersIfNeeded();
RefPtr<PageOverlay> overlay = pageOverlay;
if (m_pageOverlays.contains(overlay))
return;
m_pageOverlays.append(overlay);
std::unique_ptr<GraphicsLayer> layer = GraphicsLayer::create(m_mainFrame.page()->chrome().client().graphicsLayerFactory(), *this);
layer->setAnchorPoint(FloatPoint3D());
layer->setBackgroundColor(overlay->backgroundColor());
#ifndef NDEBUG
layer->setName("Page Overlay content");
#endif
updateSettingsForLayer(*layer);
switch (overlay->overlayType()) {
case PageOverlay::OverlayType::View:
m_viewOverlayRootLayer->addChild(layer.get());
break;
case PageOverlay::OverlayType::Document:
m_documentOverlayRootLayer->addChild(layer.get());
break;
}
GraphicsLayer& rawLayer = *layer;
m_overlayGraphicsLayers.set(overlay.get(), WTFMove(layer));
updateForceSynchronousScrollLayerPositionUpdates();
overlay->setPage(m_mainFrame.page());
if (FrameView* frameView = m_mainFrame.view())
frameView->enterCompositingMode();
updateOverlayGeometry(*overlay, rawLayer);
if (fadeMode == PageOverlay::FadeMode::Fade)
overlay->startFadeInAnimation();
}
void CoordinatedGraphicsLayer::computePixelAlignment(FloatPoint& position, FloatSize& size, FloatPoint3D& anchorPoint, FloatSize& alignmentOffset)
{
if (isIntegral(effectiveContentsScale())) {
position = m_position;
size = m_size;
anchorPoint = m_anchorPoint;
alignmentOffset = FloatSize();
return;
}
FloatPoint positionRelativeToBase = computePositionRelativeToBase();
FloatRect baseRelativeBounds(positionRelativeToBase, m_size);
FloatRect scaledBounds = baseRelativeBounds;
// Scale by the effective scale factor to compute the screen-relative bounds.
scaledBounds.scale(effectiveContentsScale());
// Round to integer boundaries.
// NOTE: When using enclosingIntRect (as mac) it will have different sizes depending on position.
FloatRect alignedBounds = enclosingIntRect(scaledBounds);
// Convert back to layer coordinates.
alignedBounds.scale(1 / effectiveContentsScale());
// Convert back to layer coordinates.
alignmentOffset = baseRelativeBounds.location() - alignedBounds.location();
position = m_position - alignmentOffset;
size = alignedBounds.size();
// Now we have to compute a new anchor point which compensates for rounding.
float anchorPointX = m_anchorPoint.x();
float anchorPointY = m_anchorPoint.y();
if (alignedBounds.width())
anchorPointX = (baseRelativeBounds.width() * anchorPointX + alignmentOffset.width()) / alignedBounds.width();
if (alignedBounds.height())
anchorPointY = (baseRelativeBounds.height() * anchorPointY + alignmentOffset.height()) / alignedBounds.height();
anchorPoint = FloatPoint3D(anchorPointX, anchorPointY, m_anchorPoint.z() * effectiveContentsScale());
}
bool RotateTransformOperation::shareSameAxis(const RotateTransformOperation* from, const RotateTransformOperation* to, FloatPoint3D* axis, double* fromAngle, double* toAngle)
{
*axis = FloatPoint3D(0, 0, 1);
*fromAngle = 0;
*toAngle = 0;
if (!from && !to)
return true;
bool fromZero = !from || from->axis().isZero();
bool toZero = !to || to->axis().isZero();
if (fromZero && toZero)
return true;
if (fromZero) {
*axis = to->axis();
*toAngle = to->angle();
return true;
}
if (toZero) {
*axis = from->axis();
*fromAngle = from->angle();
return true;
}
FloatPoint3D fromAxis = from->axis();
FloatPoint3D toAxis = to->axis();
double fromSquared = fromAxis.lengthSquared();
double toSquared = toAxis.lengthSquared();
double dot = fromAxis.dot(toAxis);
double error = std::abs(1 - (dot * dot) / (fromSquared * toSquared));
if (error > angleEpsilon)
return false;
*axis = from->axis();
*fromAngle = from->angle();
*toAngle = to->angle();
return true;
}
void PaintPropertyTreeBuilder::updatePaintOffsetTranslation(
const LayoutObject& object,
PaintPropertyTreeBuilderContext& context) {
if (object.isBoxModelObject() &&
context.current.paintOffset != LayoutPoint()) {
// TODO(trchen): Eliminate PaintLayer dependency.
PaintLayer* layer = toLayoutBoxModelObject(object).layer();
if (layer && layer->paintsWithTransform(GlobalPaintNormalPhase)) {
// We should use the same subpixel paint offset values for snapping
// regardless of whether a transform is present. If there is a transform
// we round the paint offset but keep around the residual fractional
// component for the transformed content to paint with. In spv1 this was
// called "subpixel accumulation". For more information, see
// PaintLayer::subpixelAccumulation() and
// PaintLayerPainter::paintFragmentByApplyingTransform.
IntPoint roundedPaintOffset =
roundedIntPoint(context.current.paintOffset);
LayoutPoint fractionalPaintOffset =
LayoutPoint(context.current.paintOffset - roundedPaintOffset);
context.current.transform =
object.getMutableForPainting()
.ensurePaintProperties()
.updatePaintOffsetTranslation(
context.current.transform,
TransformationMatrix().translate(roundedPaintOffset.x(),
roundedPaintOffset.y()),
FloatPoint3D(),
context.current.shouldFlattenInheritedTransform,
context.current.renderingContextID);
context.current.paintOffset = fractionalPaintOffset;
return;
}
}
if (object.isLayoutView())
return;
if (auto* properties = object.getMutableForPainting().paintProperties())
properties->clearPaintOffsetTranslation();
}
WKCACFLayerRenderer::WKCACFLayerRenderer(WKCACFLayerRendererClient* client)
: m_client(client)
, m_mightBeAbleToCreateDeviceLater(true)
, m_rootLayer(PlatformCALayer::create(PlatformCALayer::LayerTypeRootLayer, 0))
, m_context(wkCACFContextCreate())
, m_hostWindow(0)
, m_renderTimer(this, &WKCACFLayerRenderer::renderTimerFired)
, m_backingStoreDirty(false)
, m_mustResetLostDeviceBeforeRendering(false)
, m_syncLayerChanges(false)
{
// Point the CACFContext to this
wkCACFContextSetUserData(m_context, this);
// Under the root layer, we have a clipping layer to clip the content,
// that contains a scroll layer that we use for scrolling the content.
// The root layer is the size of the client area of the window.
// The clipping layer is the size of the WebView client area (window less the scrollbars).
// The scroll layer is the size of the root child layer.
// Resizing the window will change the bounds of the rootLayer and the clip layer and will not
// cause any repositioning.
// Scrolling will affect only the position of the scroll layer without affecting the bounds.
m_rootLayer->setName("WKCACFLayerRenderer rootLayer");
m_rootLayer->setAnchorPoint(FloatPoint3D(0, 0, 0));
m_rootLayer->setGeometryFlipped(true);
#ifndef NDEBUG
CGColorRef debugColor = CGColorCreateGenericRGB(1, 0, 0, 0.8);
m_rootLayer->setBackgroundColor(debugColor);
CGColorRelease(debugColor);
#endif
if (m_context)
wkCACFContextSetLayer(m_context, m_rootLayer->platformLayer());
#ifndef NDEBUG
char* printTreeFlag = getenv("CA_PRINT_TREE");
m_printTree = printTreeFlag && atoi(printTreeFlag);
#endif
}
void PaintPropertyTreeBuilder::updateScrollAndScrollTranslation(
const LayoutObject& object,
PaintPropertyTreeBuilderContext& context) {
if (object.hasOverflowClip()) {
const LayoutBox& box = toLayoutBox(object);
const PaintLayerScrollableArea* scrollableArea = box.getScrollableArea();
IntSize scrollOffset = box.scrolledContentOffset();
if (!scrollOffset.isZero() || scrollableArea->scrollsOverflow()) {
TransformationMatrix matrix = TransformationMatrix().translate(
-scrollOffset.width(), -scrollOffset.height());
context.current.transform =
object.getMutableForPainting()
.ensurePaintProperties()
.updateScrollTranslation(
context.current.transform, matrix, FloatPoint3D(),
context.current.shouldFlattenInheritedTransform,
context.current.renderingContextID);
IntSize scrollClip = scrollableArea->visibleContentRect().size();
IntSize scrollBounds = scrollableArea->contentsSize();
bool userScrollableHorizontal =
scrollableArea->userInputScrollable(HorizontalScrollbar);
bool userScrollableVertical =
scrollableArea->userInputScrollable(VerticalScrollbar);
context.current.scroll =
object.getMutableForPainting().ensurePaintProperties().updateScroll(
context.current.scroll, context.current.transform, scrollClip,
scrollBounds, userScrollableHorizontal, userScrollableVertical);
context.current.shouldFlattenInheritedTransform = false;
return;
}
}
if (auto* properties = object.getMutableForPainting().paintProperties()) {
properties->clearScrollTranslation();
properties->clearScroll();
}
}
void GraphicsLayer::setupContentsLayer(WebLayer* contentsLayer)
{
ASSERT(contentsLayer);
m_contentsLayer = contentsLayer;
m_contentsLayerId = m_contentsLayer->id();
m_contentsLayer->setWebLayerClient(this);
m_contentsLayer->setTransformOrigin(FloatPoint3D());
m_contentsLayer->setUseParentBackfaceVisibility(true);
// It is necessary to call setDrawsContent as soon as we receive the new contentsLayer, for
// the correctness of early exit conditions in setDrawsContent() and setContentsVisible().
m_contentsLayer->setDrawsContent(m_contentsVisible);
// Insert the content layer first. Video elements require this, because they have
// shadow content that must display in front of the video.
m_layer->layer()->insertChild(m_contentsLayer, 0);
WebLayer* borderWebLayer = m_contentsClippingMaskLayer ? m_contentsClippingMaskLayer->platformLayer() : 0;
m_contentsLayer->setMaskLayer(borderWebLayer);
m_contentsLayer->setRenderingContext(m_3dRenderingContext);
}
static PassRefPtr<TransformPaintPropertyNode> createPaintOffsetTranslationIfNeeded(const LayoutObject& object, PaintPropertyTreeBuilderContext& context)
{
bool shouldCreatePaintOffsetTranslationNode = false;
if (object.isSVGRoot()) {
// SVG doesn't use paint offset internally so emit a paint offset at the html->svg boundary.
shouldCreatePaintOffsetTranslationNode = true;
} else if (object.isBoxModelObject()) {
// TODO(trchen): Eliminate PaintLayer dependency.
PaintLayer* layer = toLayoutBoxModelObject(object).layer();
shouldCreatePaintOffsetTranslationNode = layer && layer->paintsWithTransform(GlobalPaintNormalPhase);
}
if (context.paintOffset == LayoutPoint() || !shouldCreatePaintOffsetTranslationNode)
return nullptr;
RefPtr<TransformPaintPropertyNode> newTransformNodeForPaintOffsetTranslation = TransformPaintPropertyNode::create(
TransformationMatrix().translate(context.paintOffset.x(), context.paintOffset.y()),
FloatPoint3D(), context.currentTransform);
context.currentTransform = newTransformNodeForPaintOffsetTranslation.get();
context.paintOffset = LayoutPoint();
return newTransformNodeForPaintOffsetTranslation.release();
}
// TODO(trchen): Remove this once we bake the paint offset into frameRect.
void PaintPropertyTreeBuilder::updateScrollbarPaintOffset(
const LayoutObject& object,
const PaintPropertyTreeBuilderContext& context) {
IntPoint roundedPaintOffset = roundedIntPoint(context.current.paintOffset);
if (roundedPaintOffset != IntPoint() && object.isBoxModelObject()) {
if (PaintLayerScrollableArea* scrollableArea =
toLayoutBoxModelObject(object).getScrollableArea()) {
if (scrollableArea->horizontalScrollbar() ||
scrollableArea->verticalScrollbar()) {
auto paintOffset = TransformationMatrix().translate(
roundedPaintOffset.x(), roundedPaintOffset.y());
object.getMutableForPainting()
.ensurePaintProperties()
.updateScrollbarPaintOffset(context.current.transform, paintOffset,
FloatPoint3D());
return;
}
}
}
if (auto* properties = object.getMutableForPainting().paintProperties())
properties->clearScrollbarPaintOffset();
}
void CACFLayerTreeHost::initialize()
{
// Point the CACFContext to this
initializeContext(this, m_rootLayer.get());
// Under the root layer, we have a clipping layer to clip the content,
// that contains a scroll layer that we use for scrolling the content.
// The root layer is the size of the client area of the window.
// The clipping layer is the size of the WebView client area (window less the scrollbars).
// The scroll layer is the size of the root child layer.
// Resizing the window will change the bounds of the rootLayer and the clip layer and will not
// cause any repositioning.
// Scrolling will affect only the position of the scroll layer without affecting the bounds.
m_rootLayer->setName("CACFLayerTreeHost rootLayer");
m_rootLayer->setAnchorPoint(FloatPoint3D(0, 0, 0));
m_rootLayer->setGeometryFlipped(true);
#ifndef NDEBUG
CGColorRef debugColor = CGColorCreateGenericRGB(1, 0, 0, 0.8);
m_rootLayer->setBackgroundColor(debugColor);
CGColorRelease(debugColor);
#endif
}
RefPtr<PlatformCALayer> TileController::createTileLayer(const IntRect& tileRect, TileGrid& grid)
{
RefPtr<PlatformCALayer> layer = m_tileCacheLayer->createCompatibleLayerOrTakeFromPool(PlatformCALayer::LayerTypeTiledBackingTileLayer, &grid, tileRect.size());
layer->setAnchorPoint(FloatPoint3D());
layer->setPosition(tileRect.location());
layer->setBorderColor(m_tileDebugBorderColor);
layer->setBorderWidth(m_tileDebugBorderWidth);
layer->setEdgeAntialiasingMask(0);
layer->setOpaque(m_tilesAreOpaque);
#ifndef NDEBUG
layer->setName("Tile");
#endif
float temporaryScaleFactor = owningGraphicsLayer()->platformCALayerContentsScaleMultiplierForNewTiles(m_tileCacheLayer);
m_hasTilesWithTemporaryScaleFactor |= temporaryScaleFactor != 1;
layer->setContentsScale(m_deviceScaleFactor * temporaryScaleFactor);
layer->setAcceleratesDrawing(m_acceleratesDrawing);
layer->setNeedsDisplay();
return layer;
}
