NativeImagePtr ImageSource::createFrameAtIndex(size_t index)
{
if (!m_decoder)
return 0;
RGBA32Buffer* buffer = m_decoder->frameBufferAtIndex(index);
if (!buffer || buffer->status() == RGBA32Buffer::FrameEmpty)
return 0;
return buffer->asNewNativeImage();
}
NativeImagePtr ImageSource::createFrameAtIndex(size_t index)
{
if (!m_decoder)
return 0;
// Note that the buffer can have NULL bytes even when it is marked as
// non-empty. It seems "FrameEmpty" is only set before the frame has been
// initialized. If it is decoded and it happens to be empty, it will be
// marked as "FrameComplete" but will still have NULL bytes.
RGBA32Buffer* buffer = m_decoder->frameBufferAtIndex(index);
if (!buffer || buffer->status() == RGBA32Buffer::FrameEmpty)
return 0;
// Copy the bitmap. The pixel data is refcounted internally by SkBitmap, so
// this doesn't cost much.
return buffer->asNewNativeImage();
}
NativeImagePtr ImageSource::createFrameAtIndex(size_t index)
{
if (!initialized())
return 0;
if (!m_decoder)
return 0;
RGBA32Buffer* buffer = m_decoder->frameBufferAtIndex(index);
if (!buffer || buffer->status() == RGBA32Buffer::FrameEmpty)
return 0;
// Cairo does not like zero height images.
// If we have a zero height image, just pretend we don't have enough data yet.
if (!size().height())
return 0;
return buffer->asNewNativeImage();
}