From bb6568cbec24ae2c84bb5d9fe418f0021291a0af Mon Sep 17 00:00:00 2001 From: Emanuele Giaquinta Date: Mon, 2 Jan 2012 19:58:15 +0000 Subject: 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 --- src/Color.c | 6 +++--- 1 file 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; } -- cgit v1.2.1