bool BitmapImage::internalAdvanceAnimation(bool skippingFrames)
{
// 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 (!skippingFrames && imageObserver()->shouldPauseAnimation(this))
return false;
m_currentFrame++;
if (m_currentFrame >= frameCount()) {
++m_repetitionsComplete;
// Get the repetition count again. If we weren't able to get a
// repetition count before, we should have decoded the whole image by
// now, so it should now be available.
if (repetitionCount(true) && m_repetitionsComplete >= m_repetitionCount) {
m_animationFinished = true;
m_desiredFrameStartTime = 0;
m_currentFrame--;
if (skippingFrames) {
// Uh oh. We tried to skip past the end of the animation. We'd
// better draw this last frame.
notifyObserverAndTrimDecodedData();
}
return false;
}
m_currentFrame = 0;
}
if (!skippingFrames)
notifyObserverAndTrimDecodedData();
return true;
}
bool BitmapImage::internalAdvanceAnimation(bool skippingFrames)
{
// 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 (!skippingFrames && imageObserver()->shouldPauseAnimation(this))
return false;
m_currentFrame++;
if (m_currentFrame >= frameCount()) {
m_repetitionsComplete += 1;
// Get the repetition count again. If we weren't able to get a
// repetition count before, we should have decoded the whole image by
// now, so it should now be available.
m_repetitionCount = m_source.repetitionCount();
if (m_repetitionCount && m_repetitionsComplete >= m_repetitionCount) {
m_animationFinished = true;
m_desiredFrameStartTime = 0;
m_currentFrame--;
if (skippingFrames) {
// Uh oh. We tried to skip past the end of the animation. We'd
// better draw this last frame.
notifyObserverAndTrimDecodedData();
}
return false;
}
m_currentFrame = 0;
}
if (!skippingFrames)
notifyObserverAndTrimDecodedData();
// 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).
return true;
}
