diff options
Diffstat (limited to 'pixman/test/utils.c')
| -rw-r--r-- | pixman/test/utils.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/pixman/test/utils.c b/pixman/test/utils.c index cc0365aa2..c1bf6dc2c 100644 --- a/pixman/test/utils.c +++ b/pixman/test/utils.c @@ -358,9 +358,16 @@ a8r8g8b8_to_rgba_np (uint32_t *dst, uint32_t *src, int n_pixels) if (a != 0) { - r = (r * 255) / a; - g = (g * 255) / a; - b = (b * 255) / a; +#define DIVIDE(c, a) \ + do \ + { \ + int t = ((c) * 255) / a; \ + (c) = t < 0? 0 : t > 255? 255 : t; \ + } while (0) + + DIVIDE (r, a); + DIVIDE (g, a); + DIVIDE (b, a); } *dst8++ = r; |