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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_layoutObject; | |
pdr.
2015/09/08 04:23:54
Nit: m_layoutBox;
trchen
2015/09/15 04:48:40
Done.
| |
31 }; | |
32 | |
33 } // namespace blink | |
34 | |
35 #endif // LayerDescendantClipRecorder_h | |
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