@@ -452,7 +452,8 @@ static void blend_slice(AVFilterContext *ctx,

                         alpha = (alpha_v + alpha_h) >> 1;

                     } else

                         alpha = a[0];

-                    *d = (*d * (0xff - alpha) + *s++ * alpha + 128) >> 8;

+                    *d = FAST_DIV255(*d * (255 - alpha) + *s * alpha);

+                    s++;

                     d++;

                     a += 1 << hsub;

                 }