From a76260156421713f09ea29ee15f7f88b85deeb56 Mon Sep 17 00:00:00 2001
From: John Cupitt <jcupitt@gmail.com>
Date: Wed, 15 Jan 2020 08:32:08 +0000
Subject: [PATCH] revise jpegsave auto no-chroma

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

Thanks @csnover
---
 libvips/foreign/vips2jpeg.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libvips/foreign/vips2jpeg.c b/libvips/foreign/vips2jpeg.c
index b96ab3e9..103deff0 100644
--- a/libvips/foreign/vips2jpeg.c
+++ b/libvips/foreign/vips2jpeg.c
@@ -79,7 +79,7 @@
  * 26/5/16
  * 	- switch to new orientation tag
  * 9/7/16
- * 	- turn off chroma subsample for Q > 90
+ * 	- turn off chroma subsample for Q >= 90
  * 7/11/16
  * 	- move exif handling out to exif.c
  * 27/2/17
@@ -631,7 +631,7 @@ write_vips( Write *write, int qfac, const char *profile,
 	 * high Q. 
 	 */
 	if( no_subsample ||
-		qfac > 90 ) { 
+		qfac >= 90 ) { 
 		int i;
 
 		for( i = 0; i < in->Bands; i++ ) {