correct subtract implementation

diff --git a/pixman/pixman-combine.c.template b/pixman/pixman-combine.c.template
index 17e184c..9aee4ab 100644 (file)
--- a/pixman/pixman-combine.c.template
+++ b/pixman/pixman-combine.c.template
@@ -1005,8 +1005,7 @@ fbCombineFlashSubtractC (pixman_implementation_t *imp, pixman_op_t op,
        s = combineMask (src, mask, i);
        m = *(mask + i);
 
-       fbCombineMaskC (&s, &m);
-       m = ~m;
+       fbCombineMaskValueC (&s, &m);
 
        Subtract (r, Red);
        Subtract (g, Green);