Fix alpha premultiplication in XRenderParseColor.

Due to C arithmetic conversion rules we must use an unsigned constant (or a
cast) to perform the multiplication using unsigned arithmetic.

Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/Color.c b/src/Color.c
index 9c76e58..23ef800 100644
--- a/src/Color.c
+++ b/src/Color.c
@@ -85,8 +85,8 @@ XRenderParseColor(Display *dpy, char *spec, XRenderColor *def)
 	def->blue = coreColor.blue;
 	def->alpha = 0xffff;
     }
-    def->red = (def->red * def->alpha) / 65535;
-    def->green = (def->green * def->alpha) / 65535;
-    def->blue = (def->blue * def->alpha) / 65535;
+    def->red = (def->red * def->alpha) / 0xffffU;
+    def->green = (def->green * def->alpha) / 0xffffU;
+    def->blue = (def->blue * def->alpha) / 0xffffU;
     return 1;
 }