From: Øyvind Kolås <pippin@gimp.org>
Date: Fri, 10 Nov 2017 09:44:21 +0000 (+0100)
Subject: extensions: protect another conversion against /0.0
X-Git-Tag: archive/raspbian/1%0.1.106-3+rpi1^2~15^2~21^2~56
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=c411c717d5c9f4944b4419434e1b83979b4720cb;p=babl.git

extensions: protect another conversion against /0.0
---

diff --git a/extensions/gggl.c b/extensions/gggl.c
index d101bef..cf83988 100644
--- a/extensions/gggl.c
+++ b/extensions/gggl.c
@@ -560,10 +560,16 @@ conv_rgbA16_rgbaF (const Babl *conversion,unsigned char *src, unsigned char *dst
     {
       float alpha = (((unsigned short *) src)[3]) / 65535.0;
       int   c;
+      float recip_alpha;
+
+      if (alpha == 0.0f)
+        recip_alpha = 10000.0;
+      else
+        recip_alpha = 1.0/alpha;
 
       for (c = 0; c < 3; c++)
         {
-          (*(float *) dst) = (*(unsigned short *) src / 65535.0) / alpha;
+          (*(float *) dst) = (*(unsigned short *) src / 65535.0) * recip_alpha;
           dst             += 4;
           src             += 2;
         }