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fix lossless decoding w/WEBP_REDUCE_SIZE

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alpha processing is still required when requesting premultiplied output

since:
1b27bf8b WEBP_REDUCE_SIZE: disable all rescaler code

Change-Id: Id1b03256c4c04b8db31527e60cd31dd20ce6f3ad
This commit is contained in:
James Zern 2017-11-29 16:54:23 -08:00
parent 796b5a8a8a
commit 296c7dc4ac
1 changed files with 5 additions and 5 deletions
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10
src/dec/vp8l_dec.c
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@ -1643,17 +1643,17 @@ int VP8LDecodeImage(VP8LDecoder* const dec) {
#if !defined(WEBP_REDUCE_SIZE)
if (io->use_scaling && !AllocateAndInitRescaler(dec, io)) goto Err;
if (io->use_scaling || WebPIsPremultipliedMode(dec->output_->colorspace)) {
// need the alpha-multiply functions for premultiplied output or rescaling
WebPInitAlphaProcessing();
}
#else
if (io->use_scaling) {
dec->status_ = VP8_STATUS_INVALID_PARAM;
goto Err;
}
#endif
if (io->use_scaling || WebPIsPremultipliedMode(dec->output_->colorspace)) {
// need the alpha-multiply functions for premultiplied output or rescaling
WebPInitAlphaProcessing();
}
if (!WebPIsRGBMode(dec->output_->colorspace)) {
WebPInitConvertARGBToYUV();
if (dec->output_->u.YUVA.a != NULL) WebPInitAlphaProcessing();