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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2009 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 CHROME_RENDERER_PAINT_AGGREGATOR_H_ | 5 #ifndef CHROME_RENDERER_PAINT_AGGREGATOR_H_ |
6 #define CHROME_RENDERER_PAINT_AGGREGATOR_H_ | 6 #define CHROME_RENDERER_PAINT_AGGREGATOR_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include <vector> | 9 #include <vector> |
10 | 10 |
11 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
12 #include "gfx/rect.h" | 12 #include "ui/gfx/rect.h" |
13 | 13 |
14 // This class is responsible for aggregating multiple invalidation and scroll | 14 // This class is responsible for aggregating multiple invalidation and scroll |
15 // commands to produce a scroll and repaint sequence. | 15 // commands to produce a scroll and repaint sequence. |
16 class PaintAggregator { | 16 class PaintAggregator { |
17 public: | 17 public: |
18 // This structure describes an aggregation of InvalidateRect and ScrollRect | 18 // This structure describes an aggregation of InvalidateRect and ScrollRect |
19 // calls. If |scroll_rect| is non-empty, then that rect should be scrolled | 19 // calls. If |scroll_rect| is non-empty, then that rect should be scrolled |
20 // by the amount specified by |scroll_delta|. If |paint_rects| is non-empty, | 20 // by the amount specified by |scroll_delta|. If |paint_rects| is non-empty, |
21 // then those rects should be repainted. If |scroll_rect| and |paint_rects| | 21 // then those rects should be repainted. If |scroll_rect| and |paint_rects| |
22 // are non-empty, then scrolling should be performed before repainting. | 22 // are non-empty, then scrolling should be performed before repainting. |
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55 private: | 55 private: |
56 gfx::Rect ScrollPaintRect(const gfx::Rect& paint_rect, int dx, int dy) const; | 56 gfx::Rect ScrollPaintRect(const gfx::Rect& paint_rect, int dx, int dy) const; |
57 bool ShouldInvalidateScrollRect(const gfx::Rect& rect) const; | 57 bool ShouldInvalidateScrollRect(const gfx::Rect& rect) const; |
58 void InvalidateScrollRect(); | 58 void InvalidateScrollRect(); |
59 void CombinePaintRects(); | 59 void CombinePaintRects(); |
60 | 60 |
61 PendingUpdate update_; | 61 PendingUpdate update_; |
62 }; | 62 }; |
63 | 63 |
64 #endif // CHROME_RENDERER_PAINT_AGGREGATOR_H_ | 64 #endif // CHROME_RENDERER_PAINT_AGGREGATOR_H_ |
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