From: Øyvind Kolås <pippin@gimp.org>
Date: Fri, 10 Nov 2017 09:34:57 +0000 (+0100)
Subject: extensions: protect gray unpremuls from gggl against division by 0.0
X-Git-Tag: archive/raspbian/1%0.1.106-3+rpi1^2~15^2~21^2~57
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=805c7d12ce5cad221551ae4a2801d6297263b5fe;p=babl.git

extensions: protect gray unpremuls from gggl against division by 0.0
---

diff --git a/extensions/gggl-lies.c b/extensions/gggl-lies.c
index b34f8ef..c08dccd 100644
--- a/extensions/gggl-lies.c
+++ b/extensions/gggl-lies.c
@@ -356,7 +356,10 @@ conv_gAF_gaF (const Babl *conversion,unsigned char *src, unsigned char *dst, lon
     {
       float alpha = (*(float *) (src + 4));
 
-      *(float *) dst = ((*(float *) src) / alpha);
+      if (alpha == 0.0f)
+        *(float *) dst = 0.0f;
+      else
+        *(float *) dst = ((*(float *) src) / alpha);
       dst           += 4;
       src           += 4;
       *(float *) dst = alpha;
diff --git a/extensions/gggl.c b/extensions/gggl.c
index 83352d2..d101bef 100644
--- a/extensions/gggl.c
+++ b/extensions/gggl.c
@@ -373,7 +373,10 @@ conv_gAF_gaF (const Babl *conversion,unsigned char *src, unsigned char *dst, lon
     {
       float alpha = (*(float *) (src + 4));
 
-      *(float *) dst = ((*(float *) src) / alpha);
+      if (alpha == 0.0f)
+        *(float *) dst = 0.0f;
+      else
+        *(float *) dst = ((*(float *) src) / alpha);
       dst           += 4;
       src           += 4;
       *(float *) dst = alpha;