[Webkit-unassigned] [Bug 239272] The first frame of an animation GIF is sometimes skipped on GTKWebKit and WinCairo

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=239272

--- Comment #6 from Fujii Hironori <Hironori.Fujii at sony.com> ---
(In reply to Fujii Hironori from comment #4)
> 2. If EncodedDataStatus is SizeAvailable, ImageDecoder::frameDurationAtIndex
> has to return the correct information for 0th frame,
> because ImageSource::cacheMetadataAtIndex is called in the following
> callstack.

I think there are two points of view for this.

1. This is a bug that GIFImageDecoder doesn't make the first frame meta data available when the image size is available.
2. This is a bug of ImageSource that it assumes the first frame meta data is available when the image size is available.

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