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IMAGE: Allow Indeo4 transparency decoding in scalable videos

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y459.avi in Starship Titanic uses these two modes together, and
this appears to work fine.
This commit is contained in:
Colin Snover 2017-08-24 21:17:54 -05:00
parent 4a39f85c1b
commit 2b46eda5b6
1 changed files with 6 additions and 5 deletions
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11
image/codecs/indeo4.cpp
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@ -761,11 +761,12 @@ int Indeo4Decoder::decodeTransparency() {
}
}
// FIXME: The transparency plane can be split, though it is not clear if
// this is in scalability mode, local decoding mode, or both. This adds
// complexity to the implementation, so avoid supporting unless it turns out
// to actually be necessary for correct decoding of game videos.
assert(!_ctx._isScalable);
// FIXME: The transparency plane can be split, apparently for local decoding
// mode (y459.avi in Titanic has the scalable flag and its transparency
// plane seems to be decoded successfully, so the split transparency plane
// does not seem to be related to scaling mode). This adds complexity to the
// implementation, so avoid supporting unless it turns out to actually be
// necessary for correct decoding of game videos.
assert(!_ctx._usesTiling);
assert(_surface.format.bytesPerPixel == 4);