| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef PaintLayerPainter_h |
| #define PaintLayerPainter_h |
| |
| #include "core/CoreExport.h" |
| #include "core/paint/PaintLayerFragment.h" |
| #include "core/paint/PaintLayerPaintingInfo.h" |
| #include "wtf/Allocator.h" |
| |
| namespace blink { |
| |
| class ClipRect; |
| class PaintLayer; |
| class GraphicsContext; |
| class LayoutPoint; |
| |
| // This class is responsible for painting self-painting PaintLayer. |
| // |
| // See PainterLayer SELF-PAINTING LAYER section about what 'self-painting' |
| // means and how it impacts this class. |
| class CORE_EXPORT PaintLayerPainter { |
| STACK_ALLOCATED(); |
| |
| public: |
| enum FragmentPolicy { AllowMultipleFragments, ForceSingleFragment }; |
| |
| // When adding new values, must update the number of bits of |
| // PaintLayer::m_previousPaintingResult. |
| enum PaintResult { |
| // The layer is fully painted. This includes cases that nothing needs |
| // painting regardless of the paint rect. |
| FullyPainted, |
| // Some part of the layer is out of the paint rect and may be not fully |
| // painted. The results cannot be cached because they may change when paint |
| // rect changes. |
| MayBeClippedByPaintDirtyRect |
| }; |
| |
| PaintLayerPainter(PaintLayer& paintLayer) : m_paintLayer(paintLayer) {} |
| |
| // The paint() method paints the layers that intersect the damage rect from |
| // back to front. paint() assumes that the caller will clip to the bounds of |
| // damageRect if necessary. |
| void paint(GraphicsContext&, |
| const LayoutRect& damageRect, |
| const GlobalPaintFlags = GlobalPaintNormalPhase, |
| PaintLayerFlags = 0); |
| // paintLayer() assumes that the caller will clip to the bounds of the |
| // painting dirty if necessary. |
| PaintResult paintLayer(GraphicsContext&, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags); |
| // paintLayerContents() assumes that the caller will clip to the bounds of the |
| // painting dirty rect if necessary. |
| PaintResult paintLayerContents(GraphicsContext&, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags, |
| FragmentPolicy = AllowMultipleFragments); |
| |
| void paintOverlayScrollbars(GraphicsContext&, |
| const LayoutRect& damageRect, |
| const GlobalPaintFlags); |
| |
| private: |
| enum ClipState { HasNotClipped, HasClipped }; |
| |
| PaintResult paintLayerContentsCompositingAllPhases( |
| GraphicsContext&, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags, |
| FragmentPolicy = AllowMultipleFragments); |
| PaintResult paintLayerWithTransform(GraphicsContext&, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags); |
| PaintResult paintFragmentByApplyingTransform( |
| GraphicsContext&, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags, |
| const LayoutPoint& fragmentTranslation); |
| |
| PaintResult paintChildren(unsigned childrenToVisit, |
| GraphicsContext&, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags); |
| bool atLeastOneFragmentIntersectsDamageRect( |
| PaintLayerFragments&, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags, |
| const LayoutPoint& offsetFromRoot); |
| void paintFragmentWithPhase(PaintPhase, |
| const PaintLayerFragment&, |
| GraphicsContext&, |
| const ClipRect&, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags, |
| ClipState); |
| void paintBackgroundForFragments(const PaintLayerFragments&, |
| GraphicsContext&, |
| const LayoutRect& transparencyPaintDirtyRect, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags); |
| void paintForegroundForFragments(const PaintLayerFragments&, |
| GraphicsContext&, |
| const LayoutRect& transparencyPaintDirtyRect, |
| const PaintLayerPaintingInfo&, |
| bool selectionOnly, |
| PaintLayerFlags); |
| void paintForegroundForFragmentsWithPhase(PaintPhase, |
| const PaintLayerFragments&, |
| GraphicsContext&, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags, |
| ClipState); |
| void paintSelfOutlineForFragments(const PaintLayerFragments&, |
| GraphicsContext&, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags); |
| void paintOverflowControlsForFragments(const PaintLayerFragments&, |
| GraphicsContext&, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags); |
| void paintMaskForFragments(const PaintLayerFragments&, |
| GraphicsContext&, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags); |
| void paintChildClippingMaskForFragments(const PaintLayerFragments&, |
| GraphicsContext&, |
| const PaintLayerPaintingInfo&, |
| PaintLayerFlags); |
| |
| static bool needsToClip(const PaintLayerPaintingInfo& localPaintingInfo, |
| const ClipRect&); |
| |
| // Returns whether this layer should be painted during sofware painting (i.e., |
| // not via calls from CompositedLayerMapping to draw into composited layers). |
| bool shouldPaintLayerInSoftwareMode(const GlobalPaintFlags, |
| PaintLayerFlags paintFlags); |
| |
| PaintLayer& m_paintLayer; |
| }; |
| |
| } // namespace blink |
| |
| #endif // PaintLayerPainter_h |