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1 /* | 1 /* |
2 * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) | 2 * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) |
3 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. All rights reserved. | 3 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. All rights reserved. |
4 * Copyright (C) 2008-2009 Torch Mobile, Inc. | 4 * Copyright (C) 2008-2009 Torch Mobile, Inc. |
5 * | 5 * |
6 * Redistribution and use in source and binary forms, with or without | 6 * Redistribution and use in source and binary forms, with or without |
7 * modification, are permitted provided that the following conditions | 7 * modification, are permitted provided that the following conditions |
8 * are met: | 8 * are met: |
9 * 1. Redistributions of source code must retain the above copyright | 9 * 1. Redistributions of source code must retain the above copyright |
10 * notice, this list of conditions and the following disclaimer. | 10 * notice, this list of conditions and the following disclaimer. |
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99 static PassRefPtr<BitmapImage> create(PassNativeImagePtr nativeImage, ImageO
bserver* observer = 0) | 99 static PassRefPtr<BitmapImage> create(PassNativeImagePtr nativeImage, ImageO
bserver* observer = 0) |
100 { | 100 { |
101 return adoptRef(new BitmapImage(nativeImage, observer)); | 101 return adoptRef(new BitmapImage(nativeImage, observer)); |
102 } | 102 } |
103 static PassRefPtr<BitmapImage> create(ImageObserver* observer = 0) | 103 static PassRefPtr<BitmapImage> create(ImageObserver* observer = 0) |
104 { | 104 { |
105 return adoptRef(new BitmapImage(observer)); | 105 return adoptRef(new BitmapImage(observer)); |
106 } | 106 } |
107 virtual ~BitmapImage(); | 107 virtual ~BitmapImage(); |
108 | 108 |
109 virtual bool isBitmapImage() const; | 109 virtual bool isBitmapImage() const OVERRIDE; |
110 | 110 |
111 virtual bool hasSingleSecurityOrigin() const; | 111 virtual bool hasSingleSecurityOrigin() const OVERRIDE; |
112 | 112 |
113 virtual IntSize size() const; | 113 virtual IntSize size() const OVERRIDE; |
114 IntSize sizeRespectingOrientation() const; | 114 IntSize sizeRespectingOrientation() const; |
115 IntSize currentFrameSize() const; | 115 IntSize currentFrameSize() const; |
116 virtual bool getHotSpot(IntPoint&) const; | 116 virtual bool getHotSpot(IntPoint&) const OVERRIDE; |
117 | 117 |
118 virtual bool dataChanged(bool allDataReceived); | 118 virtual bool dataChanged(bool allDataReceived) OVERRIDE; |
119 virtual String filenameExtension() const; | 119 virtual String filenameExtension() const OVERRIDE; |
120 | 120 |
121 // It may look unusual that there is no start animation call as public API.
This is because | 121 // It may look unusual that there is no start animation call as public API.
This is because |
122 // we start and stop animating lazily. Animation begins whenever someone dr
aws the image. It will | 122 // we start and stop animating lazily. Animation begins whenever someone dr
aws the image. It will |
123 // automatically pause once all observers no longer want to render the image
anywhere. | 123 // automatically pause once all observers no longer want to render the image
anywhere. |
124 virtual void stopAnimation(); | 124 virtual void stopAnimation() OVERRIDE; |
125 virtual void resetAnimation(); | 125 virtual void resetAnimation() OVERRIDE; |
126 | 126 |
127 virtual unsigned decodedSize() const; | 127 virtual unsigned decodedSize() const OVERRIDE; |
128 | 128 |
129 virtual PassNativeImagePtr nativeImageForCurrentFrame() OVERRIDE; | 129 virtual PassNativeImagePtr nativeImageForCurrentFrame() OVERRIDE; |
130 virtual bool currentFrameKnownToBeOpaque() OVERRIDE; | 130 virtual bool currentFrameKnownToBeOpaque() OVERRIDE; |
131 | 131 |
132 ImageOrientation currentFrameOrientation(); | 132 ImageOrientation currentFrameOrientation(); |
133 | 133 |
134 #if !ASSERT_DISABLED | 134 #if !ASSERT_DISABLED |
135 virtual bool notSolidColor(); | 135 virtual bool notSolidColor() OVERRIDE; |
136 #endif | 136 #endif |
137 | 137 |
138 void reportMemoryUsage(MemoryObjectInfo*) const OVERRIDE; | 138 void reportMemoryUsage(MemoryObjectInfo*) const OVERRIDE; |
139 | 139 |
140 private: | 140 private: |
141 void updateSize() const; | 141 void updateSize() const; |
142 | 142 |
143 protected: | 143 protected: |
144 enum RepetitionCountStatus { | 144 enum RepetitionCountStatus { |
145 Unknown, // We haven't checked the source's repetition count. | 145 Unknown, // We haven't checked the source's repetition count. |
146 Uncertain, // We have a repetition count, but it might be wrong (some GIF
s have a count after the image data, and will report "loop once" until all data
has been decoded). | 146 Uncertain, // We have a repetition count, but it might be wrong (some GIF
s have a count after the image data, and will report "loop once" until all data
has been decoded). |
147 Certain // The repetition count is known to be correct. | 147 Certain // The repetition count is known to be correct. |
148 }; | 148 }; |
149 | 149 |
150 BitmapImage(PassNativeImagePtr, ImageObserver* = 0); | 150 BitmapImage(PassNativeImagePtr, ImageObserver* = 0); |
151 BitmapImage(ImageObserver* = 0); | 151 BitmapImage(ImageObserver* = 0); |
152 | 152 |
153 virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRec
t& srcRect, ColorSpace styleColorSpace, CompositeOperator, BlendMode); | 153 virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRec
t& srcRect, ColorSpace styleColorSpace, CompositeOperator, BlendMode) OVERRIDE; |
154 virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRec
t& srcRect, ColorSpace styleColorSpace, CompositeOperator, BlendMode, RespectIma
geOrientationEnum) OVERRIDE; | 154 virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRec
t& srcRect, ColorSpace styleColorSpace, CompositeOperator, BlendMode, RespectIma
geOrientationEnum) OVERRIDE; |
155 | 155 |
156 size_t currentFrame() const { return m_currentFrame; } | 156 size_t currentFrame() const { return m_currentFrame; } |
157 virtual size_t frameCount(); | 157 size_t frameCount(); |
158 PassNativeImagePtr frameAtIndex(size_t); | 158 PassNativeImagePtr frameAtIndex(size_t); |
159 bool frameIsCompleteAtIndex(size_t); | 159 bool frameIsCompleteAtIndex(size_t); |
160 float frameDurationAtIndex(size_t); | 160 float frameDurationAtIndex(size_t); |
161 bool frameHasAlphaAtIndex(size_t); | 161 bool frameHasAlphaAtIndex(size_t); |
162 ImageOrientation frameOrientationAtIndex(size_t); | 162 ImageOrientation frameOrientationAtIndex(size_t); |
163 | 163 |
164 // Decodes and caches a frame. Never accessed except internally. | 164 // Decodes and caches a frame. Never accessed except internally. |
165 void cacheFrame(size_t index); | 165 void cacheFrame(size_t index); |
166 // Called before accessing m_frames[index]. Returns false on index out of bo
unds. | 166 // Called before accessing m_frames[index]. Returns false on index out of bo
unds. |
167 bool ensureFrameIsCached(size_t index); | 167 bool ensureFrameIsCached(size_t index); |
168 | 168 |
169 // Called to invalidate cached data. When |destroyAll| is true, we wipe out | 169 // Called to invalidate cached data. This is used while animating large |
170 // the entire frame buffer cache and tell the image source to destroy | 170 // images to keep memory footprint low. The decoder may preserve some frames |
171 // everything; this is used when e.g. we want to free some room in the image | 171 // to avoid redecoding the whole image on every frame. |
172 // cache. If |destroyAll| is false, we only delete frames up to the current | 172 virtual void destroyDecodedData() OVERRIDE; |
173 // one; this is used while animating large images to keep memory footprint | |
174 // low without redecoding the whole image on every frame. | |
175 virtual void destroyDecodedData(bool destroyAll = true); | |
176 | 173 |
177 // If the image is large enough, calls destroyDecodedData() and passes | 174 // If the image is large enough, calls destroyDecodedData(). |
178 // |destroyAll| along. | 175 void destroyDecodedDataIfNecessary(); |
179 void destroyDecodedDataIfNecessary(bool destroyAll); | |
180 | 176 |
181 // Generally called by destroyDecodedData(), destroys whole-image metadata | 177 // Generally called by destroyDecodedData(), destroys whole-image metadata |
182 // and notifies observers that the memory footprint has (hopefully) | 178 // and notifies observers that the memory footprint has (hopefully) |
183 // decreased by |frameBytesCleared|. | 179 // decreased by |frameBytesCleared|. |
184 void destroyMetadataAndNotify(unsigned frameBytesCleared); | 180 void destroyMetadataAndNotify(size_t frameBytesCleared); |
185 | 181 |
186 // Whether or not size is available yet. | 182 // Whether or not size is available yet. |
187 bool isSizeAvailable(); | 183 bool isSizeAvailable(); |
188 | 184 |
189 // Called after asking the source for any information that may require | 185 // Called after asking the source for any information that may require |
190 // decoding part of the image (e.g., the image size). We need to report | 186 // decoding part of the image (e.g., the image size). We need to report |
191 // the partially decoded data to our observer so it has an accurate | 187 // the partially decoded data to our observer so it has an accurate |
192 // account of the BitmapImage's memory usage. | 188 // account of the BitmapImage's memory usage. |
193 void didDecodeProperties() const; | 189 void didDecodeProperties() const; |
194 | 190 |
195 // Animation. | 191 // Animation. |
196 int repetitionCount(bool imageKnownToBeComplete); // |imageKnownToBeComplet
e| should be set if the caller knows the entire image has been decoded. | 192 int repetitionCount(bool imageKnownToBeComplete); // |imageKnownToBeComplet
e| should be set if the caller knows the entire image has been decoded. |
197 bool shouldAnimate(); | 193 bool shouldAnimate(); |
198 virtual void startAnimation(bool catchUpIfNecessary = true); | 194 virtual void startAnimation(bool catchUpIfNecessary = true) OVERRIDE; |
199 void advanceAnimation(Timer<BitmapImage>*); | 195 void advanceAnimation(Timer<BitmapImage>*); |
200 | 196 |
201 // Function that does the real work of advancing the animation. When | 197 // Function that does the real work of advancing the animation. When |
202 // skippingFrames is true, we're in the middle of a loop trying to skip over | 198 // skippingFrames is true, we're in the middle of a loop trying to skip over |
203 // a bunch of animation frames, so we should not do things like decode each | 199 // a bunch of animation frames, so we should not do things like decode each |
204 // one or notify our observers. | 200 // one or notify our observers. |
205 // Returns whether the animation was advanced. | 201 // Returns whether the animation was advanced. |
206 bool internalAdvanceAnimation(bool skippingFrames); | 202 bool internalAdvanceAnimation(bool skippingFrames); |
207 | 203 |
208 // Checks to see if the image is a 1x1 solid color. We optimize these image
s and just do a fill rect instead. | 204 // Checks to see if the image is a 1x1 solid color. We optimize these image
s and just do a fill rect instead. |
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240 bool m_allDataReceived : 1; // Whether or not we've received all our data. | 236 bool m_allDataReceived : 1; // Whether or not we've received all our data. |
241 mutable bool m_haveSize : 1; // Whether or not our |m_size| member variable
has the final overall image size yet. | 237 mutable bool m_haveSize : 1; // Whether or not our |m_size| member variable
has the final overall image size yet. |
242 bool m_sizeAvailable : 1; // Whether or not we can obtain the size of the fi
rst image frame yet from ImageIO. | 238 bool m_sizeAvailable : 1; // Whether or not we can obtain the size of the fi
rst image frame yet from ImageIO. |
243 mutable bool m_hasUniformFrameSize : 1; | 239 mutable bool m_hasUniformFrameSize : 1; |
244 mutable bool m_haveFrameCount : 1; | 240 mutable bool m_haveFrameCount : 1; |
245 }; | 241 }; |
246 | 242 |
247 } | 243 } |
248 | 244 |
249 #endif | 245 #endif |
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