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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef ClipRectsCache_h | 5 #ifndef ClipRectsCache_h |
| 6 #define ClipRectsCache_h | 6 #define ClipRectsCache_h |
| 7 | 7 |
| 8 #include "core/rendering/ClipRects.h" | 8 #include "core/rendering/ClipRects.h" |
| 9 | 9 |
| 10 #if ENABLE(ASSERT) | 10 #if ENABLE(ASSERT) |
| 11 #include "core/rendering/RenderBox.h" // For OverlayScrollbarSizeRelevancy. | 11 #include "core/rendering/RenderBox.h" // For OverlayScrollbarSizeRelevancy. |
| 12 #endif | 12 #endif |
| 13 | 13 |
| 14 namespace blink { | 14 namespace blink { |
| 15 | 15 |
| 16 class RenderLayer; | 16 class Layer; |
| 17 | 17 |
| 18 enum ClipRectsCacheSlot { | 18 enum ClipRectsCacheSlot { |
| 19 // Relative to the ancestor treated as the root (e.g. transformed layer). Us
ed for hit testing. | 19 // Relative to the ancestor treated as the root (e.g. transformed layer). Us
ed for hit testing. |
| 20 RootRelativeClipRects, | 20 RootRelativeClipRects, |
| 21 | 21 |
| 22 // Relative to the RenderView's layer. Used for compositing overlap testing. | 22 // Relative to the RenderView's layer. Used for compositing overlap testing. |
| 23 AbsoluteClipRects, | 23 AbsoluteClipRects, |
| 24 | 24 |
| 25 // Relative to painting ancestor. Used for painting. | 25 // Relative to painting ancestor. Used for painting. |
| 26 PaintingClipRects, | 26 PaintingClipRects, |
| 27 PaintingClipRectsIgnoringOverflowClip, | 27 PaintingClipRectsIgnoringOverflowClip, |
| 28 | 28 |
| 29 NumberOfClipRectsCacheSlots, | 29 NumberOfClipRectsCacheSlots, |
| 30 UncachedClipRects, | 30 UncachedClipRects, |
| 31 }; | 31 }; |
| 32 | 32 |
| 33 class ClipRectsCache { | 33 class ClipRectsCache { |
| 34 WTF_MAKE_FAST_ALLOCATED; | 34 WTF_MAKE_FAST_ALLOCATED; |
| 35 public: | 35 public: |
| 36 struct Entry { | 36 struct Entry { |
| 37 Entry() | 37 Entry() |
| 38 : root(0) | 38 : root(0) |
| 39 #if ENABLE(ASSERT) | 39 #if ENABLE(ASSERT) |
| 40 , scrollbarRelevancy(IgnoreOverlayScrollbarSize) | 40 , scrollbarRelevancy(IgnoreOverlayScrollbarSize) |
| 41 #endif | 41 #endif |
| 42 { | 42 { |
| 43 } | 43 } |
| 44 | 44 |
| 45 const RenderLayer* root; | 45 const Layer* root; |
| 46 RefPtr<ClipRects> clipRects; | 46 RefPtr<ClipRects> clipRects; |
| 47 #if ENABLE(ASSERT) | 47 #if ENABLE(ASSERT) |
| 48 OverlayScrollbarSizeRelevancy scrollbarRelevancy; | 48 OverlayScrollbarSizeRelevancy scrollbarRelevancy; |
| 49 #endif | 49 #endif |
| 50 }; | 50 }; |
| 51 | 51 |
| 52 Entry& get(ClipRectsCacheSlot slot) | 52 Entry& get(ClipRectsCacheSlot slot) |
| 53 { | 53 { |
| 54 ASSERT(slot < NumberOfClipRectsCacheSlots); | 54 ASSERT(slot < NumberOfClipRectsCacheSlots); |
| 55 return m_entries[slot]; | 55 return m_entries[slot]; |
| 56 } | 56 } |
| 57 | 57 |
| 58 void clear(ClipRectsCacheSlot slot) | 58 void clear(ClipRectsCacheSlot slot) |
| 59 { | 59 { |
| 60 ASSERT(slot < NumberOfClipRectsCacheSlots); | 60 ASSERT(slot < NumberOfClipRectsCacheSlots); |
| 61 m_entries[slot] = Entry(); | 61 m_entries[slot] = Entry(); |
| 62 } | 62 } |
| 63 | 63 |
| 64 private: | 64 private: |
| 65 Entry m_entries[NumberOfClipRectsCacheSlots]; | 65 Entry m_entries[NumberOfClipRectsCacheSlots]; |
| 66 }; | 66 }; |
| 67 | 67 |
| 68 } // namespace blink | 68 } // namespace blink |
| 69 | 69 |
| 70 #endif // ClipRectsCache_h | 70 #endif // ClipRectsCache_h |
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