fix lossless decoding w/WEBP_REDUCE_SIZE
alpha processing is still required when requesting premultiplied output
since:
WEBP_REDUCE_SIZE: disable all rescaler code
@@ -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();
