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| 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 |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef LayerDescendantClipRecorder_h |
| 6 #define LayerDescendantClipRecorder_h |
| 7 |
| 8 #include "core/CoreExport.h" |
| 9 #include "wtf/FastAllocBase.h" |
| 10 |
| 11 namespace blink { |
| 12 |
| 13 class GraphicsContext; |
| 14 class LayoutBox; |
| 15 class LayoutPoint; |
| 16 |
| 17 // Note: This class is designed for SPv2, and has drastically different semantic
s than |
| 18 // LayerClipRecorder. In the old layer painting model, a layer is responsible fo
r |
| 19 // calculating the accumulated clip from ancestors, and applies the clip to itse
lf. |
| 20 // In SPv2, it is the layer that establishes overflow clipping who is responsibl
e to clip |
| 21 // its descendants. This class takes a layer, and only issues clip for that laye
r. |
| 22 class CORE_EXPORT LayerDescendantClipRecorder { |
| 23 WTF_MAKE_FAST_ALLOCATED(LayerDescendantClipRecorder); |
| 24 public: |
| 25 LayerDescendantClipRecorder(GraphicsContext&, const LayoutBox&, const Layout
Point& paintOffset); |
| 26 ~LayerDescendantClipRecorder(); |
| 27 |
| 28 private: |
| 29 GraphicsContext& m_graphicsContext; |
| 30 const LayoutBox& m_layoutBox; |
| 31 }; |
| 32 |
| 33 } // namespace blink |
| 34 |
| 35 #endif // LayerDescendantClipRecorder_h |
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