Fix vmx_over_reverse_ca()

Destination alpha must be extracted after inversing, otherwise we end
up with 0xFFs in the rgb channels.

diff --git a/pixman/pixman-vmx.c b/pixman/pixman-vmx.c
index 018653e..6ad2017 100644 (file)
--- a/pixman/pixman-vmx.c
+++ b/pixman/pixman-vmx.c
@@ -1221,26 +1221,25 @@ vmx_combine_over_reverse_ca (pixman_implementation_t *imp,
     /* printf("%s\n",__PRETTY_FUNCTION__); */
     for (i = width / 4; i > 0; i--)
     {
-       
        LOAD_VECTORSC (dest, src, mask);
-       
+
        vdest = over (vdest, splat_alpha (vdest), pix_multiply (vsrc, vmask));
-       
+
        STORE_VECTOR (dest);
-       
+
        mask += 4;
        src += 4;
        dest += 4;
     }
-    
+
     for (i = width % 4; --i >= 0;)
     {
        uint32_t a = mask[i];
        uint32_t s = src[i];
        uint32_t d = dest[i];
-       uint32_t da = ALPHA_8 (d);
+       uint32_t ida = ALPHA_8 (~d);
        UN8x4_MUL_UN8x4 (s, a);
-       UN8x4_MUL_UN8x4_ADD_UN8x4 (s, ~da, d);
+       UN8x4_MUL_UN8x4_ADD_UN8x4 (s, ida, d);
        dest[i] = s;
     }
 }