#ifndef RenderLayer_h
#define RenderLayer_h
#include "PaintInfo.h"
#include "RenderBox.h"
#include "ScrollableArea.h"
#include <wtf/OwnPtr.h>
namespace WebCore {
#if ENABLE(CSS_FILTERS)
class FilterEffectRenderer;
class FilterEffectRendererHelper;
class FilterOperations;
class RenderLayerFilterInfo;
#endif
class HitTestRequest;
class HitTestResult;
class HitTestingTransformState;
class RenderFlowThread;
class RenderGeometryMap;
class RenderMarquee;
class RenderReplica;
class RenderScrollbarPart;
class RenderStyle;
class RenderView;
class Scrollbar;
class TransformationMatrix;
#if USE(ACCELERATED_COMPOSITING)
class RenderLayerBacking;
class RenderLayerCompositor;
#endif
enum BorderRadiusClippingRule { IncludeSelfForBorderRadius, DoNotIncludeSelfForBorderRadius };
enum IncludeSelfOrNot { IncludeSelf, ExcludeSelf };
enum RepaintStatus {
NeedsNormalRepaint,
NeedsFullRepaint,
NeedsFullRepaintForPositionedMovementLayout
};
class ClipRect {
public:
ClipRect()
: m_hasRadius(false)
{ }
ClipRect(const LayoutRect& rect)
: m_rect(rect)
, m_hasRadius(false)
{ }
const LayoutRect& rect() const { return m_rect; }
void setRect(const LayoutRect& rect) { m_rect = rect; }
bool hasRadius() const { return m_hasRadius; }
void setHasRadius(bool hasRadius) { m_hasRadius = hasRadius; }
bool operator==(const ClipRect& other) const { return rect() == other.rect() && hasRadius() == other.hasRadius(); }
bool operator!=(const ClipRect& other) const { return rect() != other.rect() || hasRadius() != other.hasRadius(); }
bool operator!=(const LayoutRect& otherRect) const { return rect() != otherRect; }
void intersect(const LayoutRect& other) { m_rect.intersect(other); }
void intersect(const ClipRect& other)
{
m_rect.intersect(other.rect());
if (other.hasRadius())
m_hasRadius = true;
}
void move(LayoutUnit x, LayoutUnit y) { m_rect.move(x, y); }
void move(const LayoutSize& size) { m_rect.move(size); }
void moveBy(const LayoutPoint& point) { m_rect.moveBy(point); }
bool isEmpty() const { return m_rect.isEmpty(); }
bool intersects(const LayoutRect& rect) const { return m_rect.intersects(rect); }
bool intersects(const HitTestLocation&) const;
private:
LayoutRect m_rect;
bool m_hasRadius;
};
inline ClipRect intersection(const ClipRect& a, const ClipRect& b)
{
ClipRect c = a;
c.intersect(b);
return c;
}
class ClipRects {
WTF_MAKE_FAST_ALLOCATED;
public:
static PassRefPtr<ClipRects> create()
{
return adoptRef(new ClipRects);
}
static PassRefPtr<ClipRects> create(const ClipRects& other)
{
return adoptRef(new ClipRects(other));
}
ClipRects()
: m_refCnt(1)
, m_fixed(false)
{
}
void reset(const LayoutRect& r)
{
m_overflowClipRect = r;
m_fixedClipRect = r;
m_posClipRect = r;
m_fixed = false;
}
const ClipRect& overflowClipRect() const { return m_overflowClipRect; }
void setOverflowClipRect(const ClipRect& r) { m_overflowClipRect = r; }
const ClipRect& fixedClipRect() const { return m_fixedClipRect; }
void setFixedClipRect(const ClipRect&r) { m_fixedClipRect = r; }
const ClipRect& posClipRect() const { return m_posClipRect; }
void setPosClipRect(const ClipRect& r) { m_posClipRect = r; }
bool fixed() const { return m_fixed; }
void setFixed(bool fixed) { m_fixed = fixed; }
void ref() { m_refCnt++; }
void deref()
{
if (!--m_refCnt)
delete this;
}
bool operator==(const ClipRects& other) const
{
return m_overflowClipRect == other.overflowClipRect() &&
m_fixedClipRect == other.fixedClipRect() &&
m_posClipRect == other.posClipRect() &&
m_fixed == other.fixed();
}
ClipRects& operator=(const ClipRects& other)
{
m_overflowClipRect = other.overflowClipRect();
m_fixedClipRect = other.fixedClipRect();
m_posClipRect = other.posClipRect();
m_fixed = other.fixed();
return *this;
}
private:
ClipRects(const LayoutRect& r)
: m_overflowClipRect(r)
, m_fixedClipRect(r)
, m_posClipRect(r)
, m_refCnt(1)
, m_fixed(false)
{
}
ClipRects(const ClipRects& other)
: m_overflowClipRect(other.overflowClipRect())
, m_fixedClipRect(other.fixedClipRect())
, m_posClipRect(other.posClipRect())
, m_refCnt(1)
, m_fixed(other.fixed())
{
}
ClipRect m_overflowClipRect;
ClipRect m_fixedClipRect;
ClipRect m_posClipRect;
unsigned m_refCnt : 31;
bool m_fixed : 1;
};
enum ClipRectsType {
PaintingClipRects, RootRelativeClipRects, AbsoluteClipRects, NumCachedClipRectsTypes,
AllClipRectTypes,
TemporaryClipRects
};
enum ShouldRespectOverflowClip {
IgnoreOverflowClip,
RespectOverflowClip
};
struct ClipRectsCache {
WTF_MAKE_FAST_ALLOCATED;
public:
ClipRectsCache()
{
#ifndef NDEBUG
for (int i = 0; i < NumCachedClipRectsTypes; ++i) {
m_clipRectsRoot[i] = 0;
m_scrollbarRelevancy[i] = IgnoreOverlayScrollbarSize;
}
#endif
}
PassRefPtr<ClipRects> getClipRects(ClipRectsType clipRectsType, ShouldRespectOverflowClip respectOverflow) { return m_clipRects[getIndex(clipRectsType, respectOverflow)]; }
void setClipRects(ClipRectsType clipRectsType, ShouldRespectOverflowClip respectOverflow, PassRefPtr<ClipRects> clipRects) { m_clipRects[getIndex(clipRectsType, respectOverflow)] = clipRects; }
#ifndef NDEBUG
const RenderLayer* m_clipRectsRoot[NumCachedClipRectsTypes];
OverlayScrollbarSizeRelevancy m_scrollbarRelevancy[NumCachedClipRectsTypes];
#endif
private:
int getIndex(ClipRectsType clipRectsType, ShouldRespectOverflowClip respectOverflow)
{
int index = static_cast<int>(clipRectsType);
if (respectOverflow == RespectOverflowClip)
index += static_cast<int>(NumCachedClipRectsTypes);
return index;
}
RefPtr<ClipRects> m_clipRects[NumCachedClipRectsTypes * 2];
};
struct LayerFragment {
public:
LayerFragment()
: shouldPaintContent(false)
{ }
void setRects(const LayoutRect& bounds, const ClipRect& background, const ClipRect& foreground, const ClipRect& outline)
{
layerBounds = bounds;
backgroundRect = background;
foregroundRect = foreground;
outlineRect = outline;
}
void moveBy(const LayoutPoint& offset)
{
layerBounds.moveBy(offset);
backgroundRect.moveBy(offset);
foregroundRect.moveBy(offset);
outlineRect.moveBy(offset);
paginationClip.moveBy(offset);
}
void intersect(const LayoutRect& rect)
{
backgroundRect.intersect(rect);
foregroundRect.intersect(rect);
outlineRect.intersect(rect);
}
bool shouldPaintContent;
LayoutRect layerBounds;
ClipRect backgroundRect;
ClipRect foregroundRect;
ClipRect outlineRect;
LayoutPoint paginationOffset;
LayoutRect paginationClip;
};
typedef Vector<LayerFragment, 1> LayerFragments;
class RenderLayer : public ScrollableArea {
public:
friend class RenderReplica;
RenderLayer(RenderLayerModelObject*);
~RenderLayer();
String name() const;
RenderLayerModelObject* renderer() const { return m_renderer; }
RenderBox* renderBox() const { return m_renderer && m_renderer->isBox() ? toRenderBox(m_renderer) : 0; }
RenderLayer* parent() const { return m_parent; }
RenderLayer* previousSibling() const { return m_previous; }
RenderLayer* nextSibling() const { return m_next; }
RenderLayer* firstChild() const { return m_first; }
RenderLayer* lastChild() const { return m_last; }
void addChild(RenderLayer* newChild, RenderLayer* beforeChild = 0);
RenderLayer* removeChild(RenderLayer*);
void removeOnlyThisLayer();
void insertOnlyThisLayer();
void repaintIncludingDescendants();
#if USE(ACCELERATED_COMPOSITING)
void setBackingNeedsRepaint();
void setBackingNeedsRepaintInRect(const LayoutRect&); void repaintIncludingNonCompositingDescendants(RenderLayerModelObject* repaintContainer);
#endif
void styleChanged(StyleDifference, const RenderStyle* oldStyle);
RenderMarquee* marquee() const { return m_marquee.get(); }
bool isNormalFlowOnly() const { return m_isNormalFlowOnly; }
bool isSelfPaintingLayer() const { return m_isSelfPaintingLayer; }
bool cannotBlitToWindow() const;
bool isTransparent() const;
RenderLayer* transparentPaintingAncestor();
void beginTransparencyLayers(GraphicsContext*, const RenderLayer* rootLayer, const LayoutRect& paintDirtyRect, PaintBehavior);
bool hasReflection() const { return renderer()->hasReflection(); }
bool isReflection() const { return renderer()->isReplica(); }
RenderReplica* reflection() const { return m_reflection; }
RenderLayer* reflectionLayer() const;
const RenderLayer* root() const
{
const RenderLayer* curr = this;
while (curr->parent())
curr = curr->parent();
return curr;
}
const LayoutPoint& location() const { return m_topLeft; }
void setLocation(const LayoutPoint& p) { m_topLeft = p; }
const IntSize& size() const { return m_layerSize; }
void setSize(const IntSize& size) { m_layerSize = size; }
LayoutRect rect() const { return LayoutRect(location(), size()); }
int scrollWidth() const;
int scrollHeight() const;
void panScrollFromPoint(const IntPoint&);
enum ScrollOffsetClamping {
ScrollOffsetUnclamped,
ScrollOffsetClamped
};
void scrollByRecursively(const IntSize&, ScrollOffsetClamping = ScrollOffsetUnclamped, ScrollableArea** scrolledArea = 0);
void scrollToOffset(const IntSize&, ScrollOffsetClamping = ScrollOffsetUnclamped);
void scrollToXOffset(int x, ScrollOffsetClamping clamp = ScrollOffsetUnclamped) { scrollToOffset(IntSize(x, scrollYOffset()), clamp); }
void scrollToYOffset(int y, ScrollOffsetClamping clamp = ScrollOffsetUnclamped) { scrollToOffset(IntSize(scrollXOffset(), y), clamp); }
int scrollXOffset() const { return m_scrollOffset.width() + scrollOrigin().x(); }
int scrollYOffset() const { return m_scrollOffset.height() + scrollOrigin().y(); }
IntSize scrollOffset() const { return IntSize(scrollXOffset(), scrollYOffset()); }
void scrollRectToVisible(const LayoutRect&, const ScrollAlignment& alignX, const ScrollAlignment& alignY);
LayoutRect getRectToExpose(const LayoutRect& visibleRect, const LayoutRect& visibleRectRelativeToDocument, const LayoutRect& exposeRect, const ScrollAlignment& alignX, const ScrollAlignment& alignY);
bool scrollsOverflow() const;
bool hasScrollbars() const { return m_hBar || m_vBar; }
void setHasHorizontalScrollbar(bool);
void setHasVerticalScrollbar(bool);
PassRefPtr<Scrollbar> createScrollbar(ScrollbarOrientation);
void destroyScrollbar(ScrollbarOrientation);
bool hasHorizontalScrollbar() const { return horizontalScrollbar(); }
bool hasVerticalScrollbar() const { return verticalScrollbar(); }
virtual Scrollbar* horizontalScrollbar() const { return m_hBar.get(); }
virtual Scrollbar* verticalScrollbar() const { return m_vBar.get(); }
virtual ScrollableArea* enclosingScrollableArea() const;
int verticalScrollbarWidth(OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) const;
int horizontalScrollbarHeight(OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) const;
bool hasOverflowControls() const;
bool isPointInResizeControl(const IntPoint& absolutePoint) const;
bool hitTestOverflowControls(HitTestResult&, const IntPoint& localPoint);
IntSize offsetFromResizeCorner(const IntPoint& absolutePoint) const;
void paintOverflowControls(GraphicsContext*, const IntPoint&, const IntRect& damageRect, bool paintingOverlayControls = false);
void paintScrollCorner(GraphicsContext*, const IntPoint&, const IntRect& damageRect);
void paintResizer(GraphicsContext*, const IntPoint&, const IntRect& damageRect);
void updateScrollInfoAfterLayout();
bool scroll(ScrollDirection, ScrollGranularity, float multiplier = 1);
void autoscroll(const IntPoint&);
bool canResize() const;
void resize(const PlatformMouseEvent&, const LayoutSize&);
bool inResizeMode() const { return m_inResizeMode; }
void setInResizeMode(bool b) { m_inResizeMode = b; }
bool isRootLayer() const { return m_isRootLayer; }
#if USE(ACCELERATED_COMPOSITING)
RenderLayerCompositor* compositor() const;
void contentChanged(ContentChangeType);
#endif
bool canRender3DTransforms() const;
enum UpdateLayerPositionsFlag {
CheckForRepaint = 1 << 0,
NeedsFullRepaintInBacking = 1 << 1,
IsCompositingUpdateRoot = 1 << 2,
UpdateCompositingLayers = 1 << 3,
UpdatePagination = 1 << 4
};
typedef unsigned UpdateLayerPositionsFlags;
static const UpdateLayerPositionsFlags defaultFlags = CheckForRepaint | IsCompositingUpdateRoot | UpdateCompositingLayers;
void updateLayerPositionsAfterLayout(const RenderLayer* rootLayer, UpdateLayerPositionsFlags);
void updateLayerPositionsAfterOverflowScroll();
void updateLayerPositionsAfterDocumentScroll();
#if USE(ACCELERATED_COMPOSITING)
void positionNewlyCreatedOverflowControls();
#endif
bool isPaginated() const { return m_isPaginated; }
RenderLayer* enclosingPaginationLayer() const { return m_enclosingPaginationLayer; }
void updateTransform();
#if ENABLE(CSS_COMPOSITING)
void updateBlendMode();
#endif
const LayoutSize& paintOffset() const { return m_paintOffset; }
void clearClipRectsIncludingDescendants(ClipRectsType typeToClear = AllClipRectTypes);
void clearClipRects(ClipRectsType typeToClear = AllClipRectTypes);
void addBlockSelectionGapsBounds(const LayoutRect&);
void clearBlockSelectionGapsBounds();
void repaintBlockSelectionGaps();
bool isStackingContext() const { return isStackingContext(renderer()->style()); }
bool isStackingContainer() const { return isStackingContext() || needsCompositedScrolling(); }
RenderLayer* stackingContainer() const;
RenderLayer* enclosingStackingContainer() { return isStackingContainer() ? this : stackingContainer(); }
void dirtyZOrderLists();
void dirtyStackingContainerZOrderLists();
Vector<RenderLayer*>* posZOrderList() const
{
ASSERT(!m_zOrderListsDirty);
ASSERT(isStackingContainer() || !m_posZOrderList);
return m_posZOrderList.get();
}
bool hasNegativeZOrderList() const { return negZOrderList() && negZOrderList()->size(); }
Vector<RenderLayer*>* negZOrderList() const
{
ASSERT(!m_zOrderListsDirty);
ASSERT(isStackingContainer() || !m_negZOrderList);
return m_negZOrderList.get();
}
void dirtyNormalFlowList();
Vector<RenderLayer*>* normalFlowList() const { ASSERT(!m_normalFlowListDirty); return m_normalFlowList.get(); }
void updateLayerListsIfNeeded();
bool hasVisibleContent() const { return m_hasVisibleContent; }
bool hasVisibleDescendant() const { return m_hasVisibleDescendant; }
void setHasVisibleContent();
void dirtyVisibleContentStatus();
bool hasBoxDecorationsOrBackground() const;
bool hasVisibleBoxDecorations() const;
bool isVisuallyNonEmpty() const;
bool hasNonEmptyChildRenderers() const;
bool hasSelfPaintingLayerDescendant() const { return m_hasSelfPaintingLayerDescendant; }
bool hasOutOfFlowPositionedDescendant() const { return m_hasOutOfFlowPositionedDescendant; }
RenderLayer* enclosingPositionedAncestor() const;
RenderLayer* enclosingScrollableLayer() const;
RenderLayer* clippingRootForPainting() const;
RenderLayer* enclosingOverflowClipLayer(IncludeSelfOrNot) const;
#if USE(ACCELERATED_COMPOSITING)
RenderLayer* enclosingCompositingLayer(IncludeSelfOrNot = IncludeSelf) const;
RenderLayer* enclosingCompositingLayerForRepaint(IncludeSelfOrNot = IncludeSelf) const;
RenderLayer* ancestorCompositingLayer() const { return enclosingCompositingLayer(ExcludeSelf); }
#endif
#if ENABLE(CSS_FILTERS)
RenderLayer* enclosingFilterLayer(IncludeSelfOrNot = IncludeSelf) const;
RenderLayer* enclosingFilterRepaintLayer() const;
void setFilterBackendNeedsRepaintingInRect(const LayoutRect&, bool immediate);
bool hasAncestorWithFilterOutsets() const;
#endif
bool canUseConvertToLayerCoords() const
{
return !renderer()->hasColumns() && !renderer()->hasTransform()
#if ENABLE(SVG)
&& !renderer()->isSVGRoot()
#endif
;
}
enum ColumnOffsetAdjustment { DontAdjustForColumns, AdjustForColumns };
void convertToPixelSnappedLayerCoords(const RenderLayer* ancestorLayer, IntPoint& location, ColumnOffsetAdjustment adjustForColumns = DontAdjustForColumns) const;
void convertToPixelSnappedLayerCoords(const RenderLayer* ancestorLayer, IntRect&, ColumnOffsetAdjustment adjustForColumns = DontAdjustForColumns) const;
void convertToLayerCoords(const RenderLayer* ancestorLayer, LayoutPoint&, ColumnOffsetAdjustment adjustForColumns = DontAdjustForColumns) const;
void convertToLayerCoords(const RenderLayer* ancestorLayer, LayoutRect&, ColumnOffsetAdjustment adjustForColumns = DontAdjustForColumns) const;
int zIndex() const { return renderer()->style()->zIndex(); }
enum PaintLayerFlag {
PaintLayerHaveTransparency = 1,
PaintLayerAppliedTransform = 1 << 1,
PaintLayerTemporaryClipRects = 1 << 2,
PaintLayerPaintingReflection = 1 << 3,
PaintLayerPaintingOverlayScrollbars = 1 << 4,
PaintLayerPaintingCompositingBackgroundPhase = 1 << 5,
PaintLayerPaintingCompositingForegroundPhase = 1 << 6,
PaintLayerPaintingCompositingMaskPhase = 1 << 7,
PaintLayerPaintingCompositingScrollingPhase = 1 << 8,
PaintLayerPaintingOverflowContents = 1 << 9,
PaintLayerPaintingRootBackgroundOnly = 1 << 10,
PaintLayerPaintingSkipRootBackground = 1 << 11,
PaintLayerPaintingCompositingAllPhases = (PaintLayerPaintingCompositingBackgroundPhase | PaintLayerPaintingCompositingForegroundPhase | PaintLayerPaintingCompositingMaskPhase)
};
typedef unsigned PaintLayerFlags;
void paint(GraphicsContext*, const LayoutRect& damageRect, PaintBehavior = PaintBehaviorNormal, RenderObject* subtreePaintRoot = 0,
RenderRegion* = 0, PaintLayerFlags = 0);
bool hitTest(const HitTestRequest&, HitTestResult&);
bool hitTest(const HitTestRequest&, const HitTestLocation&, HitTestResult&);
void paintOverlayScrollbars(GraphicsContext*, const LayoutRect& damageRect, PaintBehavior, RenderObject* subtreePaintRoot = 0);
struct ClipRectsContext {
ClipRectsContext(const RenderLayer* inRootLayer, RenderRegion* inRegion, ClipRectsType inClipRectsType, OverlayScrollbarSizeRelevancy inOverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize, ShouldRespectOverflowClip inRespectOverflowClip = RespectOverflowClip)
: rootLayer(inRootLayer)
, region(inRegion)
, clipRectsType(inClipRectsType)
, overlayScrollbarSizeRelevancy(inOverlayScrollbarSizeRelevancy)
, respectOverflowClip(inRespectOverflowClip)
{ }
const RenderLayer* rootLayer;
RenderRegion* region;
ClipRectsType clipRectsType;
OverlayScrollbarSizeRelevancy overlayScrollbarSizeRelevancy;
ShouldRespectOverflowClip respectOverflowClip;
};
void calculateRects(const ClipRectsContext&, const LayoutRect& paintDirtyRect, LayoutRect& layerBounds,
ClipRect& backgroundRect, ClipRect& foregroundRect, ClipRect& outlineRect, const LayoutPoint* offsetFromRoot = 0) const;
void updateClipRects(const ClipRectsContext&);
void calculateClipRects(const ClipRectsContext&, ClipRects&) const;
ClipRects* clipRects(const ClipRectsContext& context) const
{
ASSERT(context.clipRectsType < NumCachedClipRectsTypes);
return m_clipRectsCache ? m_clipRectsCache->getClipRects(context.clipRectsType, context.respectOverflowClip).get() : 0;
}
LayoutRect childrenClipRect() const; LayoutRect selfClipRect() const; LayoutRect localClipRect() const;
bool intersectsDamageRect(const LayoutRect& layerBounds, const LayoutRect& damageRect, const RenderLayer* rootLayer, const LayoutPoint* offsetFromRoot = 0) const;
enum CalculateLayerBoundsFlag {
IncludeSelfTransform = 1 << 0,
UseLocalClipRectIfPossible = 1 << 1,
IncludeLayerFilterOutsets = 1 << 2,
ExcludeHiddenDescendants = 1 << 3,
DontConstrainForMask = 1 << 4,
IncludeCompositedDescendants = 1 << 5,
UseFragmentBoxes = 1 << 6,
DefaultCalculateLayerBoundsFlags = IncludeSelfTransform | UseLocalClipRectIfPossible | IncludeLayerFilterOutsets | UseFragmentBoxes
};
typedef unsigned CalculateLayerBoundsFlags;
LayoutRect boundingBox(const RenderLayer* rootLayer, CalculateLayerBoundsFlags = 0, const LayoutPoint* offsetFromRoot = 0) const;
LayoutRect localBoundingBox(CalculateLayerBoundsFlags = 0) const;
IntRect absoluteBoundingBox() const;
LayoutRect overlapBounds() const { return overlapBoundsIncludeChildren() ? calculateLayerBounds(this) : localBoundingBox(); }
#if ENABLE(CSS_FILTERS)
bool overlapBoundsIncludeChildren() const { return hasFilter() && renderer()->style()->filter().hasFilterThatMovesPixels(); }
#else
bool overlapBoundsIncludeChildren() const { return false; }
#endif
IntRect calculateLayerBounds(const RenderLayer* ancestorLayer, const LayoutPoint* offsetFromRoot = 0, CalculateLayerBoundsFlags = DefaultCalculateLayerBoundsFlags) const;
LayoutPoint computeOffsetFromRoot(bool& hasLayerOffset) const;
LayoutRect repaintRect() const { return m_repaintRect; }
LayoutRect repaintRectIncludingNonCompositingDescendants() const;
void setRepaintStatus(RepaintStatus status) { m_repaintStatus = status; }
LayoutUnit staticInlinePosition() const { return m_staticInlinePosition; }
LayoutUnit staticBlockPosition() const { return m_staticBlockPosition; }
void setStaticInlinePosition(LayoutUnit position) { m_staticInlinePosition = position; }
void setStaticBlockPosition(LayoutUnit position) { m_staticBlockPosition = position; }
bool hasTransform() const { return renderer()->hasTransform(); }
TransformationMatrix* transform() const { return m_transform.get(); }
TransformationMatrix currentTransform(RenderStyle::ApplyTransformOrigin = RenderStyle::IncludeTransformOrigin) const;
TransformationMatrix renderableTransform(PaintBehavior) const;
TransformationMatrix perspectiveTransform() const;
FloatPoint perspectiveOrigin() const;
bool preserves3D() const { return renderer()->style()->transformStyle3D() == TransformStyle3DPreserve3D; }
bool has3DTransform() const { return m_transform && !m_transform->isAffine(); }
#if ENABLE(CSS_FILTERS)
virtual void filterNeedsRepaint();
bool hasFilter() const { return renderer()->hasFilter(); }
#else
bool hasFilter() const { return false; }
#endif
#if ENABLE(CSS_COMPOSITING)
bool hasBlendMode() const { return renderer()->hasBlendMode(); }
#else
bool hasBlendMode() const { return false; }
#endif
void* operator new(size_t, RenderArena*);
void operator delete(void*, size_t);
#if USE(ACCELERATED_COMPOSITING)
bool isComposited() const { return m_backing != 0; }
bool hasCompositedMask() const;
RenderLayerBacking* backing() const { return m_backing.get(); }
RenderLayerBacking* ensureBacking();
void clearBacking(bool layerBeingDestroyed = false);
virtual GraphicsLayer* layerForScrolling() const;
virtual GraphicsLayer* layerForHorizontalScrollbar() const;
virtual GraphicsLayer* layerForVerticalScrollbar() const;
virtual GraphicsLayer* layerForScrollCorner() const;
virtual bool usesCompositedScrolling() const OVERRIDE;
bool needsCompositedScrolling() const;
bool needsCompositingLayersRebuiltForClip(const RenderStyle* oldStyle, const RenderStyle* newStyle) const;
bool needsCompositingLayersRebuiltForOverflow(const RenderStyle* oldStyle, const RenderStyle* newStyle) const;
#else
bool isComposited() const { return false; }
bool hasCompositedMask() const { return false; }
bool usesCompositedScrolling() const { return false; }
bool needsCompositedScrolling() const { return false; }
#endif
bool paintsWithTransparency(PaintBehavior paintBehavior) const
{
return isTransparent() && ((paintBehavior & PaintBehaviorFlattenCompositingLayers) || !isComposited());
}
bool paintsWithTransform(PaintBehavior) const;
bool backgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const;
bool containsDirtyOverlayScrollbars() const { return m_containsDirtyOverlayScrollbars; }
void setContainsDirtyOverlayScrollbars(bool dirtyScrollbars) { m_containsDirtyOverlayScrollbars = dirtyScrollbars; }
#if ENABLE(CSS_SHADERS)
bool isCSSCustomFilterEnabled() const;
#endif
#if ENABLE(CSS_FILTERS)
FilterOperations computeFilterOperations(const RenderStyle*);
bool paintsWithFilters() const;
bool requiresFullLayerImageForFilters() const;
FilterEffectRenderer* filterRenderer() const;
RenderLayerFilterInfo* filterInfo() const;
RenderLayerFilterInfo* ensureFilterInfo();
void removeFilterInfoIfNeeded();
bool hasFilterInfo() const { return m_hasFilterInfo; }
void setHasFilterInfo(bool hasFilterInfo) { m_hasFilterInfo = hasFilterInfo; }
#endif
#if !ASSERT_DISABLED
bool layerListMutationAllowed() const { return m_layerListMutationAllowed; }
void setLayerListMutationAllowed(bool flag) { m_layerListMutationAllowed = flag; }
#endif
Node* enclosingElement() const;
#if ENABLE(DIALOG_ELEMENT)
bool isInTopLayer() const;
bool isInTopLayerSubtree() const;
#endif
#if USE(ACCELERATED_COMPOSITING)
enum ViewportConstrainedNotCompositedReason {
NoNotCompositedReason,
NotCompositedForBoundsOutOfView,
NotCompositedForNonViewContainer,
NotCompositedForNoVisibleContent,
};
void setViewportConstrainedNotCompositedReason(ViewportConstrainedNotCompositedReason reason) { m_viewportConstrainedNotCompositedReason = reason; }
ViewportConstrainedNotCompositedReason viewportConstrainedNotCompositedReason() const { return static_cast<ViewportConstrainedNotCompositedReason>(m_viewportConstrainedNotCompositedReason); }
#endif
bool isOutOfFlowRenderFlowThread() const { return renderer()->isOutOfFlowRenderFlowThread(); }
private:
enum CollectLayersBehavior { StopAtStackingContexts, StopAtStackingContainers };
void updateZOrderLists();
void rebuildZOrderLists();
void rebuildZOrderLists(CollectLayersBehavior, OwnPtr<Vector<RenderLayer*> >&, OwnPtr<Vector<RenderLayer*> >&);
void clearZOrderLists();
void updateNormalFlowList();
bool isStackingContext(const RenderStyle* style) const { return !style->hasAutoZIndex() || isRootLayer(); }
bool isDirtyStackingContainer() const { return m_zOrderListsDirty && isStackingContainer(); }
void setAncestorChainHasSelfPaintingLayerDescendant();
void dirtyAncestorChainHasSelfPaintingLayerDescendantStatus();
bool acceleratedCompositingForOverflowScrollEnabled() const;
void updateDescendantsAreContiguousInStackingOrder();
void updateDescendantsAreContiguousInStackingOrderRecursive(const HashMap<const RenderLayer*, int>&, int& minIndex, int& maxIndex, int& count, bool firstIteration);
void computeRepaintRects(const RenderLayerModelObject* repaintContainer, const RenderGeometryMap* = 0);
void computeRepaintRectsIncludingDescendants();
void clearRepaintRects();
void clipToRect(RenderLayer* rootLayer, GraphicsContext*, const LayoutRect& paintDirtyRect, const ClipRect&,
BorderRadiusClippingRule = IncludeSelfForBorderRadius);
void restoreClip(GraphicsContext*, const LayoutRect& paintDirtyRect, const ClipRect&);
bool shouldRepaintAfterLayout() const;
void updateSelfPaintingLayer();
void updateStackingContextsAfterStyleChange(const RenderStyle* oldStyle);
void updateScrollbarsAfterStyleChange(const RenderStyle* oldStyle);
void updateScrollbarsAfterLayout();
void setAncestorChainHasOutOfFlowPositionedDescendant(RenderObject* containingBlock);
void dirtyAncestorChainHasOutOfFlowPositionedDescendantStatus();
void updateOutOfFlowPositioned(const RenderStyle* oldStyle);
void updateNeedsCompositedScrolling();
bool updateLayerPosition();
void updateLayerPositions(RenderGeometryMap* = 0, UpdateLayerPositionsFlags = defaultFlags);
enum UpdateLayerPositionsAfterScrollFlag {
NoFlag = 0,
IsOverflowScroll = 1 << 0,
HasSeenViewportConstrainedAncestor = 1 << 1,
HasSeenAncestorWithOverflowClip = 1 << 2,
HasChangedAncestor = 1 << 3
};
typedef unsigned UpdateLayerPositionsAfterScrollFlags;
void updateLayerPositionsAfterScroll(RenderGeometryMap*, UpdateLayerPositionsAfterScrollFlags = NoFlag);
friend IntSize RenderBox::scrolledContentOffset() const;
IntSize scrolledContentOffset() const { return m_scrollOffset; }
IntSize clampScrollOffset(const IntSize&) const;
void* operator new(size_t) throw();
void setNextSibling(RenderLayer* next) { m_next = next; }
void setPreviousSibling(RenderLayer* prev) { m_previous = prev; }
void setParent(RenderLayer* parent);
void setFirstChild(RenderLayer* first) { m_first = first; }
void setLastChild(RenderLayer* last) { m_last = last; }
LayoutPoint renderBoxLocation() const { return renderer()->isBox() ? toRenderBox(renderer())->location() : LayoutPoint(); }
void collectLayers(bool includeHiddenLayers, CollectLayersBehavior, OwnPtr<Vector<RenderLayer*> >&, OwnPtr<Vector<RenderLayer*> >&);
void updateCompositingAndLayerListsIfNeeded();
struct LayerPaintingInfo {
LayerPaintingInfo(RenderLayer* inRootLayer, const LayoutRect& inDirtyRect, PaintBehavior inPaintBehavior, const LayoutSize& inSubPixelAccumulation, RenderObject* inSubtreePaintRoot = 0, RenderRegion*inRegion = 0, OverlapTestRequestMap* inOverlapTestRequests = 0)
: rootLayer(inRootLayer)
, subtreePaintRoot(inSubtreePaintRoot)
, paintDirtyRect(inDirtyRect)
, subPixelAccumulation(inSubPixelAccumulation)
, region(inRegion)
, overlapTestRequests(inOverlapTestRequests)
, paintBehavior(inPaintBehavior)
, clipToDirtyRect(true)
{ }
RenderLayer* rootLayer;
RenderObject* subtreePaintRoot; LayoutRect paintDirtyRect; LayoutSize subPixelAccumulation;
RenderRegion* region; OverlapTestRequestMap* overlapTestRequests; PaintBehavior paintBehavior;
bool clipToDirtyRect;
};
bool setupFontSubpixelQuantization(GraphicsContext*, bool& didQuantizeFonts);
bool setupClipPath(GraphicsContext*, const LayerPaintingInfo&, const LayoutPoint& offsetFromRoot, IntRect& rootRelativeBounds, bool& rootRelativeBoundsComputed);
#if ENABLE(CSS_FILTERS)
PassOwnPtr<FilterEffectRendererHelper> setupFilters(GraphicsContext*, LayerPaintingInfo&, PaintLayerFlags, const LayoutPoint& offsetFromRoot, IntRect& rootRelativeBounds, bool& rootRelativeBoundsComputed);
GraphicsContext* applyFilters(FilterEffectRendererHelper*, GraphicsContext* originalContext, LayerPaintingInfo&, LayerFragments&);
#endif
void paintLayer(GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags);
void paintLayerContentsAndReflection(GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags);
void paintLayerByApplyingTransform(GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags, const LayoutPoint& translationOffset = LayoutPoint());
void paintLayerContents(GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags);
void paintList(Vector<RenderLayer*>*, GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags);
void paintPaginatedChildLayer(RenderLayer* childLayer, GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags);
void paintChildLayerIntoColumns(RenderLayer* childLayer, GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags, const Vector<RenderLayer*>& columnLayers, size_t columnIndex);
void collectFragments(LayerFragments&, const RenderLayer* rootLayer, RenderRegion*, const LayoutRect& dirtyRect,
ClipRectsType, OverlayScrollbarSizeRelevancy inOverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize,
ShouldRespectOverflowClip = RespectOverflowClip, const LayoutPoint* offsetFromRoot = 0, const LayoutRect* layerBoundingBox = 0);
void updatePaintingInfoForFragments(LayerFragments&, const LayerPaintingInfo&, PaintLayerFlags, bool shouldPaintContent, const LayoutPoint* offsetFromRoot);
void paintBackgroundForFragments(const LayerFragments&, GraphicsContext*, GraphicsContext* transparencyLayerContext,
const LayoutRect& transparencyPaintDirtyRect, bool haveTransparency, const LayerPaintingInfo&, PaintBehavior, RenderObject* paintingRootForRenderer);
void paintForegroundForFragments(const LayerFragments&, GraphicsContext*, GraphicsContext* transparencyLayerContext,
const LayoutRect& transparencyPaintDirtyRect, bool haveTransparency, const LayerPaintingInfo&, PaintBehavior, RenderObject* paintingRootForRenderer,
bool selectionOnly, bool forceBlackText);
void paintForegroundForFragmentsWithPhase(PaintPhase, const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&, PaintBehavior, RenderObject* paintingRootForRenderer);
void paintOutlineForFragments(const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&, PaintBehavior, RenderObject* paintingRootForRenderer);
void paintOverflowControlsForFragments(const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&);
void paintMaskForFragments(const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&, RenderObject* paintingRootForRenderer);
void paintTransformedLayerIntoFragments(GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags);
RenderLayer* hitTestLayer(RenderLayer* rootLayer, RenderLayer* containerLayer, const HitTestRequest& request, HitTestResult& result,
const LayoutRect& hitTestRect, const HitTestLocation&, bool appliedTransform,
const HitTestingTransformState* transformState = 0, double* zOffset = 0);
RenderLayer* hitTestLayerByApplyingTransform(RenderLayer* rootLayer, RenderLayer* containerLayer, const HitTestRequest&, HitTestResult&,
const LayoutRect& hitTestRect, const HitTestLocation&, const HitTestingTransformState* = 0, double* zOffset = 0,
const LayoutPoint& translationOffset = LayoutPoint());
RenderLayer* hitTestList(Vector<RenderLayer*>*, RenderLayer* rootLayer, const HitTestRequest& request, HitTestResult& result,
const LayoutRect& hitTestRect, const HitTestLocation&,
const HitTestingTransformState* transformState, double* zOffsetForDescendants, double* zOffset,
const HitTestingTransformState* unflattenedTransformState, bool depthSortDescendants);
RenderLayer* hitTestPaginatedChildLayer(RenderLayer* childLayer, RenderLayer* rootLayer, const HitTestRequest& request, HitTestResult& result,
const LayoutRect& hitTestRect, const HitTestLocation&,
const HitTestingTransformState* transformState, double* zOffset);
RenderLayer* hitTestChildLayerColumns(RenderLayer* childLayer, RenderLayer* rootLayer, const HitTestRequest& request, HitTestResult& result,
const LayoutRect& hitTestRect, const HitTestLocation&,
const HitTestingTransformState* transformState, double* zOffset,
const Vector<RenderLayer*>& columnLayers, size_t columnIndex);
PassRefPtr<HitTestingTransformState> createLocalTransformState(RenderLayer* rootLayer, RenderLayer* containerLayer,
const LayoutRect& hitTestRect, const HitTestLocation&,
const HitTestingTransformState* containerTransformState,
const LayoutPoint& translationOffset = LayoutPoint()) const;
bool hitTestContents(const HitTestRequest&, HitTestResult&, const LayoutRect& layerBounds, const HitTestLocation&, HitTestFilter) const;
bool hitTestContentsForFragments(const LayerFragments&, const HitTestRequest&, HitTestResult&, const HitTestLocation&, HitTestFilter, bool& insideClipRect) const;
bool hitTestResizerInFragments(const LayerFragments&, const HitTestLocation&) const;
RenderLayer* hitTestTransformedLayerInFragments(RenderLayer* rootLayer, RenderLayer* containerLayer, const HitTestRequest&, HitTestResult&,
const LayoutRect& hitTestRect, const HitTestLocation&, const HitTestingTransformState* = 0, double* zOffset = 0);
bool listBackgroundIsKnownToBeOpaqueInRect(const Vector<RenderLayer*>*, const LayoutRect&) const;
void computeScrollDimensions();
bool hasHorizontalOverflow() const;
bool hasVerticalOverflow() const;
bool hasScrollableHorizontalOverflow() const;
bool hasScrollableVerticalOverflow() const;
bool shouldBeNormalFlowOnly() const;
bool shouldBeSelfPaintingLayer() const;
int scrollPosition(Scrollbar*) const;
virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&);
virtual void invalidateScrollCornerRect(const IntRect&);
virtual bool isActive() const;
virtual bool isScrollCornerVisible() const;
virtual IntRect scrollCornerRect() const;
virtual IntRect convertFromScrollbarToContainingView(const Scrollbar*, const IntRect&) const;
virtual IntRect convertFromContainingViewToScrollbar(const Scrollbar*, const IntRect&) const;
virtual IntPoint convertFromScrollbarToContainingView(const Scrollbar*, const IntPoint&) const;
virtual IntPoint convertFromContainingViewToScrollbar(const Scrollbar*, const IntPoint&) const;
virtual int scrollSize(ScrollbarOrientation) const;
virtual void setScrollOffset(const IntPoint&);
virtual IntPoint scrollPosition() const;
virtual IntPoint minimumScrollPosition() const;
virtual IntPoint maximumScrollPosition() const;
virtual IntRect visibleContentRect(VisibleContentRectIncludesScrollbars) const;
virtual int visibleHeight() const;
virtual int visibleWidth() const;
virtual IntSize contentsSize() const;
virtual IntSize overhangAmount() const;
virtual IntPoint lastKnownMousePosition() const;
virtual bool isHandlingWheelEvent() const OVERRIDE;
virtual bool shouldSuspendScrollAnimations() const;
virtual bool scrollbarsCanBeActive() const;
virtual IntRect scrollableAreaBoundingBox() const OVERRIDE;
virtual bool scrollbarAnimationsAreSuppressed() const OVERRIDE;
IntRect scrollCornerAndResizerRect() const;
void scrollTo(int, int);
void updateCompositingLayersAfterScroll();
IntSize scrollbarOffset(const Scrollbar*) const;
void updateScrollableAreaSet(bool hasOverflow);
void dirtyAncestorChainVisibleDescendantStatus();
void setAncestorChainHasVisibleDescendant();
void updateDescendantDependentFlags(HashSet<const RenderObject*>* outOfFlowDescendantContainingBlocks = 0);
void setHas3DTransformedDescendant(bool b) { m_has3DTransformedDescendant = b; }
bool has3DTransformedDescendant() const { return m_has3DTransformedDescendant; }
void dirty3DTransformedDescendantStatus();
bool update3DTransformedDescendantStatus();
void createReflection();
void removeReflection();
void updateReflectionStyle();
bool paintingInsideReflection() const { return m_paintingInsideReflection; }
void setPaintingInsideReflection(bool b) { m_paintingInsideReflection = b; }
#if ENABLE(CSS_FILTERS)
void updateOrRemoveFilterClients();
void updateOrRemoveFilterEffectRenderer();
#endif
void parentClipRects(const ClipRectsContext&, ClipRects&) const;
ClipRect backgroundClipRect(const ClipRectsContext&) const;
LayoutRect paintingExtent(const RenderLayer* rootLayer, const LayoutRect& paintDirtyRect, PaintBehavior);
RenderLayer* enclosingTransformedAncestor() const;
LayoutPoint absoluteToContents(const LayoutPoint&) const;
void positionOverflowControls(const IntSize&);
void updateScrollCornerStyle();
void updateResizerStyle();
void drawPlatformResizerImage(GraphicsContext*, IntRect resizerCornerRect);
void updatePagination();
bool useRegionBasedColumns() const;
#if USE(ACCELERATED_COMPOSITING)
bool hasCompositingDescendant() const { return m_hasCompositingDescendant; }
void setHasCompositingDescendant(bool b) { m_hasCompositingDescendant = b; }
enum IndirectCompositingReason {
NoIndirectCompositingReason,
IndirectCompositingForStacking,
IndirectCompositingForOverlap,
IndirectCompositingForBackgroundLayer,
IndirectCompositingForGraphicalEffect, IndirectCompositingForPerspective,
IndirectCompositingForPreserve3D
};
void setIndirectCompositingReason(IndirectCompositingReason reason) { m_indirectCompositingReason = reason; }
IndirectCompositingReason indirectCompositingReason() const { return static_cast<IndirectCompositingReason>(m_indirectCompositingReason); }
bool mustCompositeForIndirectReasons() const { return m_indirectCompositingReason; }
#endif
bool canBeStackingContainer() const;
friend class RenderLayerBacking;
friend class RenderLayerCompositor;
friend class RenderLayerModelObject;
void destroy(RenderArena*);
LayoutUnit overflowTop() const;
LayoutUnit overflowBottom() const;
LayoutUnit overflowLeft() const;
LayoutUnit overflowRight() const;
IntRect rectForHorizontalScrollbar(const IntRect& borderBoxRect) const;
IntRect rectForVerticalScrollbar(const IntRect& borderBoxRect) const;
LayoutUnit verticalScrollbarStart(int minX, int maxX) const;
LayoutUnit horizontalScrollbarStart(int minX) const;
bool overflowControlsIntersectRect(const IntRect& localRect) const;
protected:
bool m_inResizeMode : 1;
bool m_scrollDimensionsDirty : 1;
bool m_zOrderListsDirty : 1;
bool m_normalFlowListDirty: 1;
bool m_isNormalFlowOnly : 1;
bool m_isSelfPaintingLayer : 1;
bool m_hasSelfPaintingLayerDescendant : 1;
bool m_hasSelfPaintingLayerDescendantDirty : 1;
bool m_hasOutOfFlowPositionedDescendant : 1;
bool m_hasOutOfFlowPositionedDescendantDirty : 1;
bool m_needsCompositedScrolling : 1;
bool m_descendantsAreContiguousInStackingOrder : 1;
const bool m_isRootLayer : 1;
bool m_usedTransparency : 1; bool m_paintingInsideReflection : 1; bool m_inOverflowRelayout : 1;
unsigned m_repaintStatus : 2;
bool m_visibleContentStatusDirty : 1;
bool m_hasVisibleContent : 1;
bool m_visibleDescendantStatusDirty : 1;
bool m_hasVisibleDescendant : 1;
bool m_isPaginated : 1;
bool m_3DTransformedDescendantStatusDirty : 1;
bool m_has3DTransformedDescendant : 1; #if USE(ACCELERATED_COMPOSITING)
bool m_hasCompositingDescendant : 1; unsigned m_indirectCompositingReason : 3;
unsigned m_viewportConstrainedNotCompositedReason : 2;
#endif
bool m_containsDirtyOverlayScrollbars : 1;
bool m_updatingMarqueePosition : 1;
#if !ASSERT_DISABLED
bool m_layerListMutationAllowed : 1;
#endif
#if ENABLE(CSS_FILTERS)
bool m_hasFilterInfo : 1;
#endif
#if ENABLE(CSS_COMPOSITING)
BlendMode m_blendMode;
#endif
RenderLayerModelObject* m_renderer;
RenderLayer* m_parent;
RenderLayer* m_previous;
RenderLayer* m_next;
RenderLayer* m_first;
RenderLayer* m_last;
LayoutRect m_repaintRect; LayoutRect m_outlineBox;
LayoutSize m_paintOffset;
LayoutPoint m_topLeft;
IntSize m_layerSize;
IntSize m_scrollOffset;
LayoutSize m_scrollSize;
RefPtr<Scrollbar> m_hBar;
RefPtr<Scrollbar> m_vBar;
OwnPtr<Vector<RenderLayer*> > m_posZOrderList;
OwnPtr<Vector<RenderLayer*> > m_negZOrderList;
OwnPtr<Vector<RenderLayer*> > m_normalFlowList;
OwnPtr<ClipRectsCache> m_clipRectsCache;
IntPoint m_cachedOverlayScrollbarOffset;
OwnPtr<RenderMarquee> m_marquee;
LayoutUnit m_staticInlinePosition;
LayoutUnit m_staticBlockPosition;
OwnPtr<TransformationMatrix> m_transform;
RenderReplica* m_reflection;
RenderScrollbarPart* m_scrollCorner;
RenderScrollbarPart* m_resizer;
RenderLayer* m_enclosingPaginationLayer;
private:
IntRect m_blockSelectionGapsBounds;
#if USE(ACCELERATED_COMPOSITING)
OwnPtr<RenderLayerBacking> m_backing;
#endif
};
inline void RenderLayer::clearZOrderLists()
{
ASSERT(!isStackingContainer());
m_posZOrderList.clear();
m_negZOrderList.clear();
}
inline void RenderLayer::updateZOrderLists()
{
if (!m_zOrderListsDirty)
return;
if (!isStackingContainer()) {
clearZOrderLists();
m_zOrderListsDirty = false;
return;
}
rebuildZOrderLists();
}
#if !ASSERT_DISABLED
class LayerListMutationDetector {
public:
LayerListMutationDetector(RenderLayer* layer)
: m_layer(layer)
, m_previousMutationAllowedState(layer->layerListMutationAllowed())
{
m_layer->setLayerListMutationAllowed(false);
}
~LayerListMutationDetector()
{
m_layer->setLayerListMutationAllowed(m_previousMutationAllowedState);
}
private:
RenderLayer* m_layer;
bool m_previousMutationAllowedState;
};
#endif
void makeMatrixRenderable(TransformationMatrix&, bool has3DRendering);
}
#ifndef NDEBUG
void showLayerTree(const WebCore::RenderLayer*);
void showLayerTree(const WebCore::RenderObject*);
#endif
#endif // RenderLayer_h