| /* |
| * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) |
| * Copyright (C) 2004, 2005, 2006 Apple Computer, 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 "ImageAnimationObserver.h" |
| #include "IntRect.h" |
| #include "PlatformString.h" |
| #include "Timer.h" |
| #include <wtf/Vector.h> |
| #include "MimeTypeRegistry.h" |
| |
| namespace WebCore { |
| |
| BitmapImage::BitmapImage(ImageAnimationObserver* 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_haveSize(false) |
| , m_sizeAvailable(false) |
| { |
| initPlatformData(); |
| } |
| |
| BitmapImage::~BitmapImage() |
| { |
| invalidateData(); |
| stopAnimation(); |
| } |
| |
| void BitmapImage::invalidateData() |
| { |
| // Destroy the cached images and release them. |
| if (m_frames.size()) { |
| m_frames.last().clear(); |
| m_isSolidColor = false; |
| invalidatePlatformData(); |
| } |
| } |
| |
| void BitmapImage::cacheFrame(size_t index) |
| { |
| size_t numFrames = frameCount(); |
| 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.resize(numFrames); |
| |
| m_frames[index].m_frame = m_source.createFrameAtIndex(index); |
| if (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); |
| } |
| |
| IntSize BitmapImage::size() const |
| { |
| if (m_sizeAvailable && !m_haveSize) { |
| m_size = m_source.size(); |
| m_haveSize = true; |
| } |
| return m_size; |
| } |
| |
| bool BitmapImage::setNativeData(NativeBytePtr data, bool allDataReceived) |
| { |
| invalidateData(); |
| |
| // Feed all the data we've seen so far to the image decoder. |
| m_source.setData(data, 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 && animationObserver()); |
| } |
| |
| void BitmapImage::startAnimation() |
| { |
| if (m_frameTimer || !shouldAnimate() || frameCount() <= 1) |
| 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; |
| } |
| |
| |
| 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 simply pause the animation. |
| if (animationObserver()->shouldStopAnimation(this)) |
| return; |
| |
| m_currentFrame++; |
| if (m_currentFrame >= frameCount()) { |
| m_repetitionsComplete += 1; |
| if (m_repetitionCount && m_repetitionsComplete >= m_repetitionCount) { |
| m_animationFinished = false; |
| m_currentFrame--; |
| return; |
| } |
| m_currentFrame = 0; |
| } |
| |
| // Notify our observer that the animation has advanced. |
| animationObserver()->animationAdvanced(this); |
| |
| // Kick off a timer to move to the next frame. |
| m_frameTimer = new Timer<BitmapImage>(this, &BitmapImage::advanceAnimation); |
| m_frameTimer->startOneShot(frameDurationAtIndex(m_currentFrame)); |
| } |
| |
| } |