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1 /* | 1 /* |
2 * Copyright (C) 2012 Google Inc. All rights reserved. | 2 * Copyright (C) 2012 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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43 OpaqueRectTrackingContentLayerDelegate::~OpaqueRectTrackingContentLayerDelegate(
) | 43 OpaqueRectTrackingContentLayerDelegate::~OpaqueRectTrackingContentLayerDelegate(
) |
44 { | 44 { |
45 } | 45 } |
46 | 46 |
47 void OpaqueRectTrackingContentLayerDelegate::paintContents(SkCanvas* canvas, con
st IntRect& clip, IntRect& opaque) | 47 void OpaqueRectTrackingContentLayerDelegate::paintContents(SkCanvas* canvas, con
st IntRect& clip, IntRect& opaque) |
48 { | 48 { |
49 PlatformContextSkia platformContext(canvas); | 49 PlatformContextSkia platformContext(canvas); |
50 platformContext.setTrackOpaqueRegion(!m_opaque); | 50 platformContext.setTrackOpaqueRegion(!m_opaque); |
51 GraphicsContext context(&platformContext); | 51 GraphicsContext context(&platformContext); |
52 | 52 |
53 context.clearRect(clip); | |
54 context.clip(clip); | |
55 | |
56 // Record transform prior to painting, as all opaque tracking will be | 53 // Record transform prior to painting, as all opaque tracking will be |
57 // relative to this current value. | 54 // relative to this current value. |
58 AffineTransform canvasToContentTransform = context.getCTM().inverse(); | 55 AffineTransform canvasToContentTransform = context.getCTM().inverse(); |
59 | 56 |
60 m_painter->paint(context, clip); | 57 m_painter->paint(context, clip); |
61 | 58 |
62 // Transform tracked opaque paints back to our layer's content space. | 59 // Transform tracked opaque paints back to our layer's content space. |
63 ASSERT(canvasToContentTransform.isInvertible()); | 60 ASSERT(canvasToContentTransform.isInvertible()); |
64 ASSERT(canvasToContentTransform.preservesAxisAlignment()); | 61 ASSERT(canvasToContentTransform.preservesAxisAlignment()); |
65 FloatRect opaqueCanvasRect = platformContext.opaqueRegion().asRect(); | 62 FloatRect opaqueCanvasRect = platformContext.opaqueRegion().asRect(); |
66 opaque = enclosedIntRect(canvasToContentTransform.mapRect(opaqueCanvasRect))
; | 63 opaque = enclosedIntRect(canvasToContentTransform.mapRect(opaqueCanvasRect))
; |
67 } | 64 } |
68 | 65 |
69 } | 66 } |
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