dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2024-12-27 06:08:21 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

fix missing WebPInitAlphaProcessing call for premultiplied colorspace output

Browse Source 
(lossless only)

Change-Id: Ic2d01c8cf9bc1082f07f348733461eb2ee30288a
This commit is contained in:
skal 2014-05-28 10:44:05 +02:00
parent 57897bae09
commit c9b340a279
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/dec/vp8l.c
View File

@ -412,7 +412,6 @@ static int AllocateAndInitRescaler(VP8LDecoder* const dec, VP8Io* const io) {
WebPRescalerInit(dec->rescaler, in_width, in_height, (uint8_t*)scaled_data,
out_width, out_height, 0, num_channels,
in_width, out_width, in_height, out_height, work);
WebPInitAlphaProcessing(); // needed for pre/post multiply with alpha
return 1;
}
@ -1372,6 +1371,11 @@ int VP8LDecodeImage(VP8LDecoder* const dec) {
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();
}
// Decode.
dec->action_ = READ_DATA;
if (!DecodeImageData(dec, dec->pixels_, dec->width_, dec->height_,
@ -1391,4 +1395,3 @@ int VP8LDecodeImage(VP8LDecoder* const dec) {
}
//------------------------------------------------------------------------------