1 /* 2 * Copyright (C) 2006 Samuel Weinig (sam.weinig (at) gmail.com) 3 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. All rights reserved. 4 * Copyright (C) 2008-2009 Torch Mobile, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef BitmapImage_h 29 #define BitmapImage_h 30 31 #include "Image.h" 32 #include "Color.h" 33 #include "IntSize.h" 34 35 #if PLATFORM(MAC) 36 #include <wtf/RetainPtr.h> 37 #ifdef __OBJC__ 38 @class NSImage; 39 #else 40 class NSImage; 41 #endif 42 #endif 43 44 #if PLATFORM(WIN) 45 typedef struct HBITMAP__ *HBITMAP; 46 #endif 47 48 #if PLATFORM(HAIKU) 49 class BBitmap; 50 #endif 51 52 namespace WebCore { 53 struct FrameData; 54 } 55 56 // This complicated-looking declaration tells the FrameData Vector that it should copy without 57 // invoking our constructor or destructor. This allows us to have a vector even for a struct 58 // that's not copyable. 59 namespace WTF { 60 template<> class VectorTraits<WebCore::FrameData> : public SimpleClassVectorTraits {}; 61 } 62 63 namespace WebCore { 64 65 template <typename T> class Timer; 66 67 // ================================================ 68 // FrameData Class 69 // ================================================ 70 71 struct FrameData : Noncopyable { 72 FrameData() 73 : m_frame(0) 74 , m_haveMetadata(false) 75 , m_isComplete(false) 76 , m_duration(0) 77 , m_hasAlpha(true) 78 { 79 } 80 81 ~FrameData() 82 { 83 clear(true); 84 } 85 86 // Clear the cached image data on the frame, and (optionally) the metadata. 87 // Returns whether there was cached image data to clear. 88 bool clear(bool clearMetadata); 89 90 NativeImagePtr m_frame; 91 bool m_haveMetadata; 92 bool m_isComplete; 93 float m_duration; 94 bool m_hasAlpha; 95 }; 96 97 // ================================================= 98 // BitmapImage Class 99 // ================================================= 100 101 class BitmapImage : public Image { 102 friend class GeneratedImage; 103 friend class GraphicsContext; 104 public: 105 static PassRefPtr<BitmapImage> create(NativeImagePtr nativeImage, ImageObserver* observer = 0) 106 { 107 return adoptRef(new BitmapImage(nativeImage, observer)); 108 } 109 static PassRefPtr<BitmapImage> create(ImageObserver* observer = 0) 110 { 111 return adoptRef(new BitmapImage(observer)); 112 } 113 ~BitmapImage(); 114 115 virtual bool isBitmapImage() const { return true; } 116 117 virtual bool hasSingleSecurityOrigin() const { return true; } 118 119 virtual IntSize size() const; 120 IntSize currentFrameSize() const; 121 122 virtual bool dataChanged(bool allDataReceived); 123 virtual String filenameExtension() const; 124 125 // It may look unusual that there is no start animation call as public API. This is because 126 // we start and stop animating lazily. Animation begins whenever someone draws the image. It will 127 // automatically pause once all observers no longer want to render the image anywhere. 128 virtual void stopAnimation(); 129 virtual void resetAnimation(); 130 131 virtual unsigned decodedSize() const { return m_decodedSize; } 132 133 #if PLATFORM(MAC) 134 // Accessors for native image formats. 135 virtual NSImage* getNSImage(); 136 virtual CFDataRef getTIFFRepresentation(); 137 #endif 138 139 #if PLATFORM(CG) 140 virtual CGImageRef getCGImageRef(); 141 #endif 142 143 #if PLATFORM(WIN) || (PLATFORM(QT) && OS(WINDOWS)) 144 static PassRefPtr<BitmapImage> create(HBITMAP); 145 #endif 146 #if PLATFORM(WIN) 147 virtual bool getHBITMAP(HBITMAP); 148 virtual bool getHBITMAPOfSize(HBITMAP, LPSIZE); 149 #endif 150 151 #if PLATFORM(ANDROID) 152 virtual void setURL(const String& str); 153 #endif 154 155 #if PLATFORM(GTK) 156 virtual GdkPixbuf* getGdkPixbuf(); 157 #endif 158 159 virtual NativeImagePtr nativeImageForCurrentFrame() { return frameAtIndex(currentFrame()); } 160 161 protected: 162 enum RepetitionCountStatus { 163 Unknown, // We haven't checked the source's repetition count. 164 Uncertain, // We have a repetition count, but it might be wrong (some GIFs have a count after the image data, and will report "loop once" until all data has been decoded). 165 Certain, // The repetition count is known to be correct. 166 }; 167 168 BitmapImage(NativeImagePtr, ImageObserver* = 0); 169 BitmapImage(ImageObserver* = 0); 170 171 #if PLATFORM(WIN) 172 virtual void drawFrameMatchingSourceSize(GraphicsContext*, const FloatRect& dstRect, const IntSize& srcSize, ColorSpace styleColorSpace, CompositeOperator); 173 #endif 174 virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, ColorSpace styleColorSpace, CompositeOperator); 175 176 #if (OS(WINCE) && !PLATFORM(QT)) 177 virtual void drawPattern(GraphicsContext*, const FloatRect& srcRect, const TransformationMatrix& patternTransform, 178 const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator, const FloatRect& destRect); 179 #endif 180 181 #if PLATFORM(HAIKU) 182 virtual BBitmap* getBBitmap() const; 183 #endif 184 185 size_t currentFrame() const { return m_currentFrame; } 186 size_t frameCount(); 187 NativeImagePtr frameAtIndex(size_t); 188 bool frameIsCompleteAtIndex(size_t); 189 float frameDurationAtIndex(size_t); 190 bool frameHasAlphaAtIndex(size_t); 191 192 // Decodes and caches a frame. Never accessed except internally. 193 void cacheFrame(size_t index); 194 195 // Called to invalidate cached data. When |destroyAll| is true, we wipe out 196 // the entire frame buffer cache and tell the image source to destroy 197 // everything; this is used when e.g. we want to free some room in the image 198 // cache. If |destroyAll| is false, we only delete frames up to the current 199 // one; this is used while animating large images to keep memory footprint 200 // low without redecoding the whole image on every frame. 201 virtual void destroyDecodedData(bool destroyAll = true); 202 203 // If the image is large enough, calls destroyDecodedData() and passes 204 // |destroyAll| along. 205 void destroyDecodedDataIfNecessary(bool destroyAll); 206 207 // Generally called by destroyDecodedData(), destroys whole-image metadata 208 // and notifies observers that the memory footprint has (hopefully) 209 // decreased by |framesCleared| times the size (in bytes) of a frame. 210 void destroyMetadataAndNotify(int framesCleared); 211 212 // Whether or not size is available yet. 213 bool isSizeAvailable(); 214 215 // Animation. 216 int repetitionCount(bool imageKnownToBeComplete); // |imageKnownToBeComplete| should be set if the caller knows the entire image has been decoded. 217 bool shouldAnimate(); 218 virtual void startAnimation(bool catchUpIfNecessary = true); 219 void advanceAnimation(Timer<BitmapImage>*); 220 221 // Function that does the real work of advancing the animation. When 222 // skippingFrames is true, we're in the middle of a loop trying to skip over 223 // a bunch of animation frames, so we should not do things like decode each 224 // one or notify our observers. 225 // Returns whether the animation was advanced. 226 bool internalAdvanceAnimation(bool skippingFrames); 227 228 // Handle platform-specific data 229 void initPlatformData(); 230 void invalidatePlatformData(); 231 232 // Checks to see if the image is a 1x1 solid color. We optimize these images and just do a fill rect instead. 233 // This check should happen regardless whether m_checkedForSolidColor is already set, as the frame may have 234 // changed. 235 void checkForSolidColor(); 236 237 virtual bool mayFillWithSolidColor() 238 { 239 if (!m_checkedForSolidColor && frameCount() > 0) { 240 checkForSolidColor(); 241 // WINCE PORT: checkForSolidColor() doesn't set m_checkedForSolidColor until 242 // it gets enough information to make final decision. 243 #if !OS(WINCE) 244 ASSERT(m_checkedForSolidColor); 245 #endif 246 } 247 return m_isSolidColor && m_currentFrame == 0; 248 } 249 virtual Color solidColor() const { return m_solidColor; } 250 251 ImageSource m_source; 252 mutable IntSize m_size; // The size to use for the overall image (will just be the size of the first image). 253 254 size_t m_currentFrame; // The index of the current frame of animation. 255 Vector<FrameData> m_frames; // An array of the cached frames of the animation. We have to ref frames to pin them in the cache. 256 257 Timer<BitmapImage>* m_frameTimer; 258 int m_repetitionCount; // How many total animation loops we should do. This will be cAnimationNone if this image type is incapable of animation. 259 RepetitionCountStatus m_repetitionCountStatus; 260 int m_repetitionsComplete; // How many repetitions we've finished. 261 double m_desiredFrameStartTime; // The system time at which we hope to see the next call to startAnimation(). 262 263 #if PLATFORM(MAC) 264 mutable RetainPtr<NSImage> m_nsImage; // A cached NSImage of frame 0. Only built lazily if someone actually queries for one. 265 mutable RetainPtr<CFDataRef> m_tiffRep; // Cached TIFF rep for frame 0. Only built lazily if someone queries for one. 266 #endif 267 268 Color m_solidColor; // If we're a 1x1 solid color, this is the color to use to fill. 269 bool m_isSolidColor; // Whether or not we are a 1x1 solid image. 270 bool m_checkedForSolidColor; // Whether we've checked the frame for solid color. 271 272 bool m_animationFinished; // Whether or not we've completed the entire animation. 273 274 bool m_allDataReceived; // Whether or not we've received all our data. 275 276 mutable bool m_haveSize; // Whether or not our |m_size| member variable has the final overall image size yet. 277 bool m_sizeAvailable; // Whether or not we can obtain the size of the first image frame yet from ImageIO. 278 mutable bool m_hasUniformFrameSize; 279 280 unsigned m_decodedSize; // The current size of all decoded frames. 281 282 mutable bool m_haveFrameCount; 283 size_t m_frameCount; 284 }; 285 286 } 287 288 #endif 289
