| /* |
| * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) |
| * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "BitmapImage.h" |
| |
| #include "FloatRect.h" |
| #include "ImageObserver.h" |
| #include "IntRect.h" |
| #include "PlatformString.h" |
| #include "Timer.h" |
| #include <wtf/Vector.h> |
| #include "MIMETypeRegistry.h" |
| |
| namespace WebCore { |
| |
| // Animated images >5MB are considered large enough that we'll only hang on to |
| // one frame at a time. |
| const unsigned cLargeAnimationCutoff = 5242880; |
| |
| BitmapImage::BitmapImage(ImageObserver* observer) |
| : Image(observer) |
| , m_currentFrame(0) |
| , m_frames(0) |
| , m_frameTimer(0) |
| , m_repetitionCount(0) |
| , m_repetitionsComplete(0) |
| , m_isSolidColor(false) |
| , m_animatingImageType(true) |
| , m_animationFinished(false) |
| , m_allDataReceived(false) |
| , m_haveSize(false) |
| , m_sizeAvailable(false) |
| , m_decodedSize(0) |
| { |
| initPlatformData(); |
| } |
| |
| BitmapImage::~BitmapImage() |
| { |
| invalidatePlatformData(); |
| stopAnimation(); |
| } |
| |
| void BitmapImage::destroyDecodedData(bool incremental) |
| { |
| // Destroy the cached images and release them. |
| if (m_frames.size()) { |
| int sizeChange = 0; |
| int frameSize = m_size.width() * m_size.height() * 4; |
| for (unsigned i = incremental ? m_frames.size() - 1 : 0; i < m_frames.size(); i++) { |
| if (m_frames[i].m_frame) { |
| sizeChange -= frameSize; |
| m_frames[i].clear(); |
| } |
| } |
| |
| // We just always invalidate our platform data, even in the incremental case. |
| // This could be better, but it's not a big deal. |
| m_isSolidColor = false; |
| invalidatePlatformData(); |
| |
| if (sizeChange) { |
| m_decodedSize += sizeChange; |
| if (imageObserver()) |
| imageObserver()->decodedSizeChanged(this, sizeChange); |
| } |
| |
| if (!incremental) { |
| // Reset the image source, since Image I/O has an underlying cache that it uses |
| // while animating that it seems to never clear. |
| m_source.clear(); |
| m_source.setData(m_data.get(), m_allDataReceived); |
| } |
| } |
| } |
| |
| void BitmapImage::cacheFrame(size_t index) |
| { |
| size_t numFrames = frameCount(); |
| ASSERT(m_decodedSize == 0 || numFrames > 1); |
| |
| if (!m_frames.size() && shouldAnimate()) { |
| // Snag the repetition count. |
| m_repetitionCount = m_source.repetitionCount(); |
| if (m_repetitionCount == cAnimationNone) |
| m_animatingImageType = false; |
| } |
| |
| if (m_frames.size() < numFrames) |
| m_frames.grow(numFrames); |
| |
| m_frames[index].m_frame = m_source.createFrameAtIndex(index); |
| if (numFrames == 1 && m_frames[index].m_frame) |
| checkForSolidColor(); |
| |
| if (shouldAnimate()) |
| m_frames[index].m_duration = m_source.frameDurationAtIndex(index); |
| m_frames[index].m_hasAlpha = m_source.frameHasAlphaAtIndex(index); |
| |
| int sizeChange = m_frames[index].m_frame ? m_size.width() * m_size.height() * 4 : 0; |
| if (sizeChange) { |
| m_decodedSize += sizeChange; |
| if (imageObserver()) |
| imageObserver()->decodedSizeChanged(this, sizeChange); |
| } |
| } |
| |
| IntSize BitmapImage::size() const |
| { |
| if (m_sizeAvailable && !m_haveSize) { |
| m_size = m_source.size(); |
| m_haveSize = true; |
| } |
| return m_size; |
| } |
| |
| bool BitmapImage::dataChanged(bool allDataReceived) |
| { |
| destroyDecodedData(true); |
| |
| // Feed all the data we've seen so far to the image decoder. |
| m_allDataReceived = allDataReceived; |
| m_source.setData(m_data.get(), allDataReceived); |
| |
| // Image properties will not be available until the first frame of the file |
| // reaches kCGImageStatusIncomplete. |
| return isSizeAvailable(); |
| } |
| |
| size_t BitmapImage::frameCount() |
| { |
| return m_source.frameCount(); |
| } |
| |
| bool BitmapImage::isSizeAvailable() |
| { |
| if (m_sizeAvailable) |
| return true; |
| |
| m_sizeAvailable = m_source.isSizeAvailable(); |
| |
| return m_sizeAvailable; |
| } |
| |
| NativeImagePtr BitmapImage::frameAtIndex(size_t index) |
| { |
| if (index >= frameCount()) |
| return 0; |
| |
| if (index >= m_frames.size() || !m_frames[index].m_frame) |
| cacheFrame(index); |
| |
| return m_frames[index].m_frame; |
| } |
| |
| float BitmapImage::frameDurationAtIndex(size_t index) |
| { |
| if (index >= frameCount()) |
| return 0; |
| |
| if (index >= m_frames.size() || !m_frames[index].m_frame) |
| cacheFrame(index); |
| |
| return m_frames[index].m_duration; |
| } |
| |
| bool BitmapImage::frameHasAlphaAtIndex(size_t index) |
| { |
| if (index >= frameCount()) |
| return 0; |
| |
| if (index >= m_frames.size() || !m_frames[index].m_frame) |
| cacheFrame(index); |
| |
| return m_frames[index].m_hasAlpha; |
| } |
| |
| bool BitmapImage::shouldAnimate() |
| { |
| return (m_animatingImageType && !m_animationFinished && imageObserver()); |
| } |
| |
| void BitmapImage::startAnimation() |
| { |
| if (m_frameTimer || !shouldAnimate() || frameCount() <= 1) |
| return; |
| |
| // Don't advance the animation until the current frame has completely loaded. |
| if (!m_source.frameIsCompleteAtIndex(m_currentFrame)) |
| return; |
| |
| m_frameTimer = new Timer<BitmapImage>(this, &BitmapImage::advanceAnimation); |
| m_frameTimer->startOneShot(frameDurationAtIndex(m_currentFrame)); |
| } |
| |
| void BitmapImage::stopAnimation() |
| { |
| // This timer is used to animate all occurrences of this image. Don't invalidate |
| // the timer unless all renderers have stopped drawing. |
| delete m_frameTimer; |
| m_frameTimer = 0; |
| } |
| |
| void BitmapImage::resetAnimation() |
| { |
| stopAnimation(); |
| m_currentFrame = 0; |
| m_repetitionsComplete = 0; |
| m_animationFinished = false; |
| int frameSize = m_size.width() * m_size.height() * 4; |
| |
| // For extremely large animations, when the animation is reset, we just throw everything away. |
| if (frameCount() * frameSize > cLargeAnimationCutoff) |
| destroyDecodedData(); |
| } |
| |
| void BitmapImage::advanceAnimation(Timer<BitmapImage>* timer) |
| { |
| // Stop the animation. |
| stopAnimation(); |
| |
| // See if anyone is still paying attention to this animation. If not, we don't |
| // advance and will remain suspended at the current frame until the animation is resumed. |
| if (imageObserver()->shouldPauseAnimation(this)) |
| return; |
| |
| m_currentFrame++; |
| if (m_currentFrame >= frameCount()) { |
| m_repetitionsComplete += 1; |
| if (m_repetitionCount && m_repetitionsComplete >= m_repetitionCount) { |
| m_animationFinished = true; |
| m_currentFrame--; |
| return; |
| } |
| m_currentFrame = 0; |
| } |
| |
| // Notify our observer that the animation has advanced. |
| imageObserver()->animationAdvanced(this); |
| |
| // For large animated images, go ahead and throw away frames as we go to save |
| // footprint. |
| int frameSize = m_size.width() * m_size.height() * 4; |
| if (frameCount() * frameSize > cLargeAnimationCutoff) { |
| // Destroy all of our frames and just redecode every time. |
| destroyDecodedData(); |
| |
| // Go ahead and decode the next frame. |
| frameAtIndex(m_currentFrame); |
| } |
| |
| // We do not advance the animation explicitly. We rely on a subsequent draw of the image |
| // to force a request for the next frame via startAnimation(). This allows images that move offscreen while |
| // scrolling to stop animating (thus saving memory from additional decoded frames and |
| // CPU time spent doing the decoding). |
| } |
| |
| } |