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1 /* | 1 /* |
2 * Copyright (C) 2006, 2007, 2008 Apple Computer, Inc. All rights reserved. | 2 * Copyright (C) 2006, 2007, 2008 Apple Computer, Inc. All rights reserved. |
3 * Copyright (C) 2007 Alp Toker <alp@atoker.com> | 3 * Copyright (C) 2007 Alp Toker <alp@atoker.com> |
4 * | 4 * |
5 * Redistribution and use in source and binary forms, with or without | 5 * Redistribution and use in source and binary forms, with or without |
6 * modification, are permitted provided that the following conditions | 6 * modification, are permitted provided that the following conditions |
7 * are met: | 7 * are met: |
8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
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31 #include "platform/graphics/GraphicsTypes.h" | 31 #include "platform/graphics/GraphicsTypes.h" |
32 #include "wtf/PassRefPtr.h" | 32 #include "wtf/PassRefPtr.h" |
33 | 33 |
34 namespace blink { | 34 namespace blink { |
35 | 35 |
36 class Image; | 36 class Image; |
37 class SecurityOrigin; | 37 class SecurityOrigin; |
38 | 38 |
39 enum SourceImageStatus { | 39 enum SourceImageStatus { |
40 NormalSourceImageStatus, | 40 NormalSourceImageStatus, |
41 UndecodableSourceImageStatus, // Image element with a 'broken' image | 41 UndecodableSourceImageStatus, // Image element with a 'broken' image |
42 ZeroSizeCanvasSourceImageStatus, // Source is a canvas with width or heigh of
zero | 42 ZeroSizeCanvasSourceImageStatus, // Source is a canvas with width or heigh of |
43 IncompleteSourceImageStatus, // Image element with no source media | 43 // zero |
| 44 IncompleteSourceImageStatus, // Image element with no source media |
44 InvalidSourceImageStatus, | 45 InvalidSourceImageStatus, |
45 }; | 46 }; |
46 | 47 |
47 class CORE_EXPORT CanvasImageSource { | 48 class CORE_EXPORT CanvasImageSource { |
48 public: | 49 public: |
49 virtual PassRefPtr<Image> getSourceImageForCanvas(SourceImageStatus*, | 50 virtual PassRefPtr<Image> getSourceImageForCanvas(SourceImageStatus*, |
50 AccelerationHint, | 51 AccelerationHint, |
51 SnapshotReason, | 52 SnapshotReason, |
52 const FloatSize&) const = 0; | 53 const FloatSize&) const = 0; |
53 | 54 |
54 // IMPORTANT: Result must be independent of whether destinationContext is | 55 // IMPORTANT: Result must be independent of whether destinationContext is |
55 // already tainted because this function may be used to determine whether | 56 // already tainted because this function may be used to determine whether |
56 // a CanvasPattern is "origin clean", and that pattern may be used on | 57 // a CanvasPattern is "origin clean", and that pattern may be used on |
57 // another canvas, which may not be already tainted. | 58 // another canvas, which may not be already tainted. |
58 virtual bool wouldTaintOrigin( | 59 virtual bool wouldTaintOrigin( |
59 SecurityOrigin* destinationSecurityOrigin) const = 0; | 60 SecurityOrigin* destinationSecurityOrigin) const = 0; |
60 | 61 |
61 virtual bool isCSSImageValue() const { return false; } | 62 virtual bool isCSSImageValue() const { return false; } |
62 virtual bool isVideoElement() const { return false; } | 63 virtual bool isVideoElement() const { return false; } |
63 virtual bool isCanvasElement() const { return false; } | 64 virtual bool isCanvasElement() const { return false; } |
64 virtual bool isSVGSource() const { return false; } | 65 virtual bool isSVGSource() const { return false; } |
65 virtual bool isImageBitmap() const { return false; } | 66 virtual bool isImageBitmap() const { return false; } |
66 virtual bool isOffscreenCanvas() const { return false; } | 67 virtual bool isOffscreenCanvas() const { return false; } |
67 | 68 |
68 // Adjusts the source and destination rectangles for cases where the actual | 69 // Adjusts the source and destination rectangles for cases where the actual |
69 // source image is a subregion of the image returned by getSourceImageForCanva
s. | 70 // source image is a subregion of the image returned by |
| 71 // getSourceImageForCanvas. |
70 virtual void adjustDrawRects(FloatRect* srcRect, FloatRect* dstRect) const {} | 72 virtual void adjustDrawRects(FloatRect* srcRect, FloatRect* dstRect) const {} |
71 | 73 |
72 virtual FloatSize elementSize(const FloatSize& defaultObjectSize) const = 0; | 74 virtual FloatSize elementSize(const FloatSize& defaultObjectSize) const = 0; |
73 virtual FloatSize defaultDestinationSize( | 75 virtual FloatSize defaultDestinationSize( |
74 const FloatSize& defaultObjectSize) const { | 76 const FloatSize& defaultObjectSize) const { |
75 return elementSize(defaultObjectSize); | 77 return elementSize(defaultObjectSize); |
76 } | 78 } |
77 virtual const KURL& sourceURL() const { return blankURL(); } | 79 virtual const KURL& sourceURL() const { return blankURL(); } |
78 virtual bool isOpaque() const { return false; } | 80 virtual bool isOpaque() const { return false; } |
79 virtual bool isAccelerated() const = 0; | 81 virtual bool isAccelerated() const = 0; |
80 | 82 |
81 virtual int sourceWidth() = 0; | 83 virtual int sourceWidth() = 0; |
82 virtual int sourceHeight() = 0; | 84 virtual int sourceHeight() = 0; |
83 | 85 |
84 protected: | 86 protected: |
85 virtual ~CanvasImageSource() {} | 87 virtual ~CanvasImageSource() {} |
86 }; | 88 }; |
87 | 89 |
88 } // namespace blink | 90 } // namespace blink |
89 | 91 |
90 #endif | 92 #endif |
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