NativeImagePtr BitmapImage::frameImageAtIndex(size_t index, float presentationScaleHint)
{
if (index >= frameCount())
return nullptr;
SubsamplingLevel subsamplingLevel = m_source.subsamplingLevelForScale(presentationScaleHint);
// We may have cached a frame with a higher subsampling level, in which case we need to
// re-decode with a lower level.
if (index < m_frames.size() && m_frames[index].m_image && subsamplingLevel < m_frames[index].m_subsamplingLevel) {
// If the image is already cached, but at too small a size, re-decode a larger version.
int sizeChange = -m_frames[index].m_frameBytes;
m_frames[index].clear(true);
invalidatePlatformData();
m_decodedSize += sizeChange;
if (imageObserver())
imageObserver()->decodedSizeChanged(this, sizeChange);
}
// If we haven't fetched a frame yet, do so.
if (index >= m_frames.size() || !m_frames[index].m_image)
cacheFrame(index, subsamplingLevel, CacheMetadataAndFrame);
return m_frames[index].m_image;
}
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::destroyMetadataAndNotify(int framesCleared)
{
m_isSolidColor = false;
invalidatePlatformData();
const int deltaBytes = framesCleared * -frameBytes(m_size);
m_decodedSize += deltaBytes;
if (deltaBytes && imageObserver())
imageObserver()->decodedSizeChanged(this, deltaBytes);
}
void BitmapImage::destroyMetadataAndNotify(unsigned frameBytesCleared)
{
m_isSolidColor = false;
m_checkedForSolidColor = false;
invalidatePlatformData();
ASSERT(m_decodedSize >= frameBytesCleared);
m_decodedSize -= frameBytesCleared;
if (frameBytesCleared > 0) {
frameBytesCleared += m_decodedPropertiesSize;
m_decodedPropertiesSize = 0;
}
if (frameBytesCleared && imageObserver())
imageObserver()->decodedSizeChanged(this, -safeCast<int>(frameBytesCleared));
}
void BitmapImage::destroyMetadataAndNotify(int framesCleared)
{
m_isSolidColor = false;
m_checkedForSolidColor = false;
invalidatePlatformData();
int deltaBytes = framesCleared * -frameBytes(m_size);
m_decodedSize += deltaBytes;
if (framesCleared > 0) {
deltaBytes -= m_decodedPropertiesSize;
m_decodedPropertiesSize = 0;
}
if (deltaBytes && imageObserver())
imageObserver()->decodedSizeChanged(this, deltaBytes);
}
void BitmapImage::destroyMetadataAndNotify(unsigned frameBytesCleared, ClearedSource clearedSource)
{
m_solidColor = Nullopt;
invalidatePlatformData();
ASSERT(m_decodedSize >= frameBytesCleared);
m_decodedSize -= frameBytesCleared;
// Clearing the ImageSource destroys the extra decoded data used for determining image properties.
if (clearedSource == ClearedSource::Yes) {
frameBytesCleared += m_decodedPropertiesSize;
m_decodedPropertiesSize = 0;
}
if (frameBytesCleared && imageObserver())
imageObserver()->decodedSizeChanged(this, -safeCast<int>(frameBytesCleared));
}
BitmapImage::~BitmapImage()
{
invalidatePlatformData();
stopAnimation();
}