2 * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
3 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc. All rights reserved.
4 * Copyright (C) 2008-2009 Torch Mobile, Inc.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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.
36 #include <wtf/RetainPtr.h>
45 typedef struct HBITMAP__ *HBITMAP;
57 // FIXME: This declaration gives FrameData a default constructor that zeroes
58 // all its data members, even though FrameData's default constructor defined
59 // below does not zero all its data members. One of these must be wrong!
60 template<> struct VectorTraits<WebCore::FrameData> : public SimpleClassVectorTraits { };
65 template <typename T> class Timer;
67 // ================================================
69 // ================================================
72 WTF_MAKE_NONCOPYABLE(FrameData);
76 , m_haveMetadata(false)
88 // Clear the cached image data on the frame, and (optionally) the metadata.
89 // Returns whether there was cached image data to clear.
90 bool clear(bool clearMetadata);
92 NativeImagePtr m_frame;
99 // =================================================
101 // =================================================
103 class BitmapImage : public Image {
104 friend class GeneratedImage;
105 friend class GraphicsContext;
107 static PassRefPtr<BitmapImage> create(NativeImagePtr nativeImage, ImageObserver* observer = 0)
109 return adoptRef(new BitmapImage(nativeImage, observer));
111 static PassRefPtr<BitmapImage> create(ImageObserver* observer = 0)
113 return adoptRef(new BitmapImage(observer));
117 virtual bool isBitmapImage() const { return true; }
119 virtual bool hasSingleSecurityOrigin() const { return true; }
121 virtual IntSize size() const;
122 IntSize currentFrameSize() const;
123 virtual bool getHotSpot(IntPoint&) const;
125 virtual bool dataChanged(bool allDataReceived);
126 virtual String filenameExtension() const;
128 // It may look unusual that there is no start animation call as public API. This is because
129 // we start and stop animating lazily. Animation begins whenever someone draws the image. It will
130 // automatically pause once all observers no longer want to render the image anywhere.
131 virtual void stopAnimation();
132 virtual void resetAnimation();
134 virtual unsigned decodedSize() const { return m_decodedSize; }
137 // Accessors for native image formats.
138 virtual NSImage* getNSImage();
139 virtual CFDataRef getTIFFRepresentation();
143 virtual CGImageRef getCGImageRef();
144 virtual CGImageRef getFirstCGImageRefOfSize(const IntSize&);
147 #if PLATFORM(WIN) || (PLATFORM(QT) && OS(WINDOWS))
148 static PassRefPtr<BitmapImage> create(HBITMAP);
151 virtual bool getHBITMAP(HBITMAP);
152 virtual bool getHBITMAPOfSize(HBITMAP, LPSIZE);
155 #if PLATFORM(ANDROID)
156 virtual void setURL(const String& str);
160 virtual GdkPixbuf* getGdkPixbuf();
163 virtual NativeImagePtr nativeImageForCurrentFrame() { return frameAtIndex(currentFrame()); }
164 bool frameHasAlphaAtIndex(size_t);
169 return size().width() != 1 || size().height() != 1 || frameCount() > 1;
174 enum RepetitionCountStatus {
175 Unknown, // We haven't checked the source's repetition count.
176 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).
177 Certain // The repetition count is known to be correct.
180 BitmapImage(NativeImagePtr, ImageObserver* = 0);
181 BitmapImage(ImageObserver* = 0);
184 virtual void drawFrameMatchingSourceSize(GraphicsContext*, const FloatRect& dstRect, const IntSize& srcSize, ColorSpace styleColorSpace, CompositeOperator);
186 virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, ColorSpace styleColorSpace, CompositeOperator);
188 #if (OS(WINCE) && !PLATFORM(QT))
189 virtual void drawPattern(GraphicsContext*, const FloatRect& srcRect, const AffineTransform& patternTransform,
190 const FloatPoint& phase, ColorSpace styleColorSpace, CompositeOperator, const FloatRect& destRect);
194 virtual BBitmap* getBBitmap() const;
197 size_t currentFrame() const { return m_currentFrame; }
199 NativeImagePtr frameAtIndex(size_t);
200 bool frameIsCompleteAtIndex(size_t);
201 float frameDurationAtIndex(size_t);
203 // Decodes and caches a frame. Never accessed except internally.
204 void cacheFrame(size_t index);
206 // Called to invalidate cached data. When |destroyAll| is true, we wipe out
207 // the entire frame buffer cache and tell the image source to destroy
208 // everything; this is used when e.g. we want to free some room in the image
209 // cache. If |destroyAll| is false, we only delete frames up to the current
210 // one; this is used while animating large images to keep memory footprint
211 // low without redecoding the whole image on every frame.
212 virtual void destroyDecodedData(bool destroyAll = true);
214 // If the image is large enough, calls destroyDecodedData() and passes
215 // |destroyAll| along.
216 void destroyDecodedDataIfNecessary(bool destroyAll);
218 // Generally called by destroyDecodedData(), destroys whole-image metadata
219 // and notifies observers that the memory footprint has (hopefully)
220 // decreased by |framesCleared| times the size (in bytes) of a frame.
221 void destroyMetadataAndNotify(int framesCleared);
223 // Whether or not size is available yet.
224 bool isSizeAvailable();
226 // Called after asking the source for any information that may require
227 // decoding part of the image (e.g., the image size). We need to report
228 // the partially decoded data to our observer so it has an accurate
229 // account of the BitmapImage's memory usage.
230 void didDecodeProperties() const;
233 int repetitionCount(bool imageKnownToBeComplete); // |imageKnownToBeComplete| should be set if the caller knows the entire image has been decoded.
234 bool shouldAnimate();
235 virtual void startAnimation(bool catchUpIfNecessary = true);
236 void advanceAnimation(Timer<BitmapImage>*);
238 // Function that does the real work of advancing the animation. When
239 // skippingFrames is true, we're in the middle of a loop trying to skip over
240 // a bunch of animation frames, so we should not do things like decode each
241 // one or notify our observers.
242 // Returns whether the animation was advanced.
243 bool internalAdvanceAnimation(bool skippingFrames);
245 // Handle platform-specific data
246 void initPlatformData();
247 void invalidatePlatformData();
249 // Checks to see if the image is a 1x1 solid color. We optimize these images and just do a fill rect instead.
250 // This check should happen regardless whether m_checkedForSolidColor is already set, as the frame may have
252 void checkForSolidColor();
254 virtual bool mayFillWithSolidColor()
256 if (!m_checkedForSolidColor && frameCount() > 0) {
257 checkForSolidColor();
258 // WINCE PORT: checkForSolidColor() doesn't set m_checkedForSolidColor until
259 // it gets enough information to make final decision.
261 ASSERT(m_checkedForSolidColor);
264 return m_isSolidColor && m_currentFrame == 0;
266 virtual Color solidColor() const { return m_solidColor; }
268 ImageSource m_source;
269 mutable IntSize m_size; // The size to use for the overall image (will just be the size of the first image).
271 size_t m_currentFrame; // The index of the current frame of animation.
272 Vector<FrameData> m_frames; // An array of the cached frames of the animation. We have to ref frames to pin them in the cache.
274 Timer<BitmapImage>* m_frameTimer;
275 int m_repetitionCount; // How many total animation loops we should do. This will be cAnimationNone if this image type is incapable of animation.
276 RepetitionCountStatus m_repetitionCountStatus;
277 int m_repetitionsComplete; // How many repetitions we've finished.
278 double m_desiredFrameStartTime; // The system time at which we hope to see the next call to startAnimation().
281 mutable RetainPtr<NSImage> m_nsImage; // A cached NSImage of frame 0. Only built lazily if someone actually queries for one.
282 mutable RetainPtr<CFDataRef> m_tiffRep; // Cached TIFF rep for frame 0. Only built lazily if someone queries for one.
285 Color m_solidColor; // If we're a 1x1 solid color, this is the color to use to fill.
286 bool m_isSolidColor; // Whether or not we are a 1x1 solid image.
287 bool m_checkedForSolidColor; // Whether we've checked the frame for solid color.
289 bool m_animationFinished; // Whether or not we've completed the entire animation.
291 bool m_allDataReceived; // Whether or not we've received all our data.
293 mutable bool m_haveSize; // Whether or not our |m_size| member variable has the final overall image size yet.
294 bool m_sizeAvailable; // Whether or not we can obtain the size of the first image frame yet from ImageIO.
295 mutable bool m_hasUniformFrameSize;
297 unsigned m_decodedSize; // The current size of all decoded frames.
298 mutable unsigned m_decodedPropertiesSize; // The size of data decoded by the source to determine image properties (e.g. size, frame count, etc).
300 mutable bool m_haveFrameCount;