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revise jpegsave auto no-chroma

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IM actually uses Q >= 90, not > 90, to disable chroma subsampling.
Adjust libvips to match.

Thanks @csnover
This commit is contained in:
John Cupitt 2020-01-15 08:32:08 +00:00
parent 8752a76e66
commit a762601564
1 changed files with 2 additions and 2 deletions
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4
libvips/foreign/vips2jpeg.c
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@ -79,7 +79,7 @@
* 26/5/16 * 26/5/16
* - switch to new orientation tag * - switch to new orientation tag
* 9/7/16 * 9/7/16
* - turn off chroma subsample for Q > 90 * - turn off chroma subsample for Q >= 90
* 7/11/16 * 7/11/16
* - move exif handling out to exif.c * - move exif handling out to exif.c
* 27/2/17 * 27/2/17
@ -631,7 +631,7 @@ write_vips( Write *write, int qfac, const char *profile,
* high Q. * high Q.
*/ */
if( no_subsample || if( no_subsample ||
qfac > 90 ) { qfac >= 90 ) {
int i; int i;
for( i = 0; i < in->Bands; i++ ) { for( i = 0; i < in->Bands; i++ ) {