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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef GeometryMapperClipCache_h | |
| 6 #define GeometryMapperClipCache_h | |
| 7 | |
| 8 #include "platform/PlatformExport.h" | |
| 9 #include "platform/graphics/paint/FloatClipRect.h" | |
| 10 #include "wtf/Vector.h" | |
| 11 | |
| 12 namespace blink { | |
| 13 | |
| 14 class ClipPaintPropertyNode; | |
| 15 class FloatClipRect; | |
| 16 class TransformPaintPropertyNode; | |
| 17 | |
| 18 // A GeometryMapperClipCache hangs off a ClipPaintPropertyNode. It stores | |
| 19 // cached "clip visual rects" (See GeometryMapper.h) from that node in | |
| 20 // ancestor spaces. | |
| 21 class PLATFORM_EXPORT GeometryMapperClipCache { | |
| 22 public: | |
| 23 GeometryMapperClipCache(){}; | |
| 24 | |
| 25 struct ClipAndTransform { | |
| 26 const ClipPaintPropertyNode* ancestorClip; | |
| 27 const TransformPaintPropertyNode* ancestorTransform; | |
| 28 bool operator==(const ClipAndTransform& other) const { | |
| 29 return ancestorClip == other.ancestorClip && | |
| 30 ancestorTransform == other.ancestorTransform; | |
| 31 } | |
| 32 ClipAndTransform(const ClipPaintPropertyNode* ancestorClipArg, | |
| 33 const TransformPaintPropertyNode* ancestorTransformArg) | |
| 34 : ancestorClip(ancestorClipArg), | |
| 35 ancestorTransform(ancestorTransformArg) {} | |
| 36 }; | |
| 37 | |
| 38 // Returns the clip visual rect of the owning | |
| 39 // clip of |this| in the space of |ancestors|, if there is one cached. | |
| 40 // Otherwise returns null. | |
| 41 const FloatClipRect* getCachedClip(const ClipAndTransform& ancestors); | |
| 42 // Stores the "clip visual rect" of |this in the space of |ancestors|, | |
| 43 // into a local cache. | |
| 44 | |
| 45 void setCachedClip(const ClipAndTransform&, const FloatClipRect&); | |
| 46 | |
| 47 static void clearCache(); | |
| 48 | |
| 49 private: | |
| 50 struct ClipCacheEntry { | |
| 51 const ClipAndTransform clipAndTransform; | |
| 52 const FloatClipRect clipRect; | |
| 53 ClipCacheEntry(const ClipAndTransform& clipAndTransformArg, | |
| 54 const FloatClipRect& clipRectArg) | |
| 55 : clipAndTransform(clipAndTransformArg), clipRect(clipRectArg) {} | |
| 56 }; | |
| 57 | |
| 58 void invalidateCacheIfNeeded(); | |
| 59 | |
| 60 Vector<ClipCacheEntry> m_clipCache; | |
| 61 unsigned m_cacheGeneration; | |
| 62 | |
| 63 DISALLOW_COPY_AND_ASSIGN(GeometryMapperClipCache); | |
| 64 }; | |
| 65 | |
| 66 } // namespace blink | |
| 67 | |
| 68 #endif // GeometryMapperClipCache_h | |
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Chromium Code Reviews
Issue 2738113003:
Revert of Improve performance of GeometryMapper cache. (Closed)
