dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-16 05:49:51 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

for ReadXXXX() image-readers, use the value of pic->use_argb

Browse Source 
This is to infer the needed conversion to YUV(A) or RGB(A).

This is useful to avoid some conversion steps between ARGB and YUVA.
For instance, if the input file is a JPEG, we decode to RGB and
convert to YUV right away, without the intermediate step to ARGB.

The only caveat is that cropping/scaling might give slightly different result,
because of YUV420 downsampling. Therefore, we omit this feature
at cwebp level, when -crop or -rescale is used.

Change-Id: I5a3abe5108982f2a4570e841e3d9baffc73f5bee
This commit is contained in:
Pascal Massimino
2015-10-27 22:54:11 +01:00
parent 469ba2cdfd
commit 7861578bd6
11 changed files with 17 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
examples/wicdec.h
View File

@ -21,7 +21,7 @@ struct WebPPicture;
// Reads an image from 'filename', returning the decoded output in 'pic'.
// If 'keep_alpha' is true and the image has an alpha channel, the output is
// RGBA otherwise it will be RGB.
// RGBA otherwise it will be RGB. pic->use_argb is always forced to true.
// Returns true on success.
int ReadPictureWithWIC(const char* const filename,
struct WebPPicture* const pic, int keep_alpha,