Source/platform/graphics/ImageBufferSurface.h - Issue 1195513002: Use SkImage snapshots for ImageBufferSurface texture access

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Issue 1195513002: Use SkImage snapshots for ImageBufferSurface texture access (Closed) Base URL: svn://svn.chromium.org/blink/trunk

Patch Set: review comments Created 5 years, 6 months ago

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1 /*	1 /*

2 * Copyright (c) 2013, Google Inc. All rights reserved.	2 * Copyright (c) 2013, 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 are	5 * modification, are permitted provided that the following conditions are

6 * met:	6 * met:

7 *	7 *

8 * * Redistributions of source code must retain the above copyright	8 * * 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 * * Redistributions in binary form must reproduce the above	10 * * Redistributions in binary form must reproduce the above

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55 class PLATFORM_EXPORT ImageBufferSurface {	55 class PLATFORM_EXPORT ImageBufferSurface {

56 WTF_MAKE_NONCOPYABLE(ImageBufferSurface); WTF_MAKE_FAST_ALLOCATED(ImageBuffe rSurface);	56 WTF_MAKE_NONCOPYABLE(ImageBufferSurface); WTF_MAKE_FAST_ALLOCATED(ImageBuffe rSurface);

57 public:	57 public:

58 virtual ~ImageBufferSurface();	58 virtual ~ImageBufferSurface();

59	59

60 virtual SkCanvas* canvas() const = 0;	60 virtual SkCanvas* canvas() const = 0;

61 virtual const SkBitmap& bitmap();	61 virtual const SkBitmap& bitmap();

62 virtual void willAccessPixels() { }	62 virtual void willAccessPixels() { }

63 virtual void didDraw(const FloatRect& rect) { }	63 virtual void didDraw(const FloatRect& rect) { }

64 virtual bool isValid() const = 0;	64 virtual bool isValid() const = 0;

65 virtual bool restore() { return false; };	65 virtual bool restore() { return false; }

66 virtual WebLayer* layer() const { return 0; };	66 virtual WebLayer* layer() const { return 0; }

67 virtual bool isAccelerated() const { return false; }	67 virtual bool isAccelerated() const { return false; }

68 virtual bool isRecording() const { return false; }	68 virtual bool isRecording() const { return false; }

69 virtual Platform3DObject getBackingTexture() const { return 0; }

70 virtual void didModifyBackingTexture() { }	69 virtual void didModifyBackingTexture() { }

71 virtual bool cachedBitmapEnabled() const { return false; }	70 virtual bool cachedBitmapEnabled() const { return false; }

72 virtual bool isExpensiveToPaint() { return false; }	71 virtual bool isExpensiveToPaint() { return false; }

73 virtual const SkBitmap& cachedBitmap() const;	72 virtual const SkBitmap& cachedBitmap() const;

74 virtual void invalidateCachedBitmap() { }	73 virtual void invalidateCachedBitmap() { }

75 virtual void updateCachedBitmapIfNeeded() { }	74 virtual void updateCachedBitmapIfNeeded() { }

76 virtual void setFilterQuality(SkFilterQuality) { }	75 virtual void setFilterQuality(SkFilterQuality) { }

77 virtual void setIsHidden(bool) { }	76 virtual void setIsHidden(bool) { }

78 virtual void setImageBuffer(ImageBuffer*) { }	77 virtual void setImageBuffer(ImageBuffer*) { }

79 virtual PassRefPtr<SkPicture> getPicture();	78 virtual PassRefPtr<SkPicture> getPicture();

80 virtual void finalizeFrame(const FloatRect &dirtyRect) { }	79 virtual void finalizeFrame(const FloatRect &dirtyRect) { }

81 virtual void willDrawVideo() { }	80 virtual void willDrawVideo() { }

82 virtual void willOverwriteCanvas() { }	81 virtual void willOverwriteCanvas() { }

83 virtual PassRefPtr<SkImage> newImageSnapshot() const;

84 virtual void draw(GraphicsContext*, const FloatRect& destRect, const FloatRe ct& srcRect, SkXfermode::Mode);	82 virtual void draw(GraphicsContext*, const FloatRect& destRect, const FloatRe ct& srcRect, SkXfermode::Mode);

85 virtual void setHasExpensiveOp() { }	83 virtual void setHasExpensiveOp() { }

86	84

	85 // These methods return an SkImage representing the backing texture. We supp ort both variants

	86 // to avoid the snapshot overhead (flushing deferred draws, COW semantics, f allback in

	87 // RecordingImageBufferSurface) when not strictly required.

	88 virtual PassRefPtr<SkImage> newImageSnapshot() const { return nullptr; }

	89 virtual PassRefPtr<SkImage> getBackingTextureImage() const { return nullptr; }

	90

87 OpacityMode opacityMode() const { return m_opacityMode; }	91 OpacityMode opacityMode() const { return m_opacityMode; }

88 const IntSize& size() const { return m_size; }	92 const IntSize& size() const { return m_size; }

89 void notifyIsValidChanged(bool isValid) const;	93 void notifyIsValidChanged(bool isValid) const;

90	94

91 protected:	95 protected:

92 ImageBufferSurface(const IntSize&, OpacityMode);	96 ImageBufferSurface(const IntSize&, OpacityMode);

93 void clear();	97 void clear();

94	98

95 private:	99 private:

96 OpacityMode m_opacityMode;	100 OpacityMode m_opacityMode;

97 IntSize m_size;	101 IntSize m_size;

98 };	102 };

99	103

100 } // namespace blink	104 } // namespace blink

101	105

102 #endif	106 #endif

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