diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2012-05-20 10:33:17 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2012-05-20 10:41:12 +0100 |
| commit | 5a7a9c93e7f807ae8ee7504ff308e9676dbe8d25 (patch) | |
| tree | ae92a8049d93ec671e879c539c1f5e7801ddf545 /src | |
| parent | ced090871bbc4c052fd4ac627cdd8fc7e80f0d62 (diff) | |
image: Tidy lerp8x4
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'src')
| -rw-r--r-- | src/cairo-image-compositor.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/src/cairo-image-compositor.c b/src/cairo-image-compositor.c index 5a1ea4a6..b0afc5d4 100644 --- a/src/cairo-image-compositor.c +++ b/src/cairo-image-compositor.c @@ -1921,15 +1921,10 @@ mul8_8 (uint8_t a, uint8_t b) static inline uint32_t lerp8x4 (uint32_t src, uint8_t a, uint32_t dst) { - uint8_t ia = ~a; - uint32_t r1, r2; - - r1 = add8x2_8x2 (mul8x2_8 (src, a), - mul8x2_8 (dst, ia)); - r2 = add8x2_8x2 (mul8x2_8 (src >> G_SHIFT, a), - mul8x2_8 (dst >> G_SHIFT, ia)); - - return r1 | (r2 << G_SHIFT); + return (add8x2_8x2 (mul8x2_8 (src, a), + mul8x2_8 (dst, ~a)) | + add8x2_8x2 (mul8x2_8 (src >> G_SHIFT, a), + mul8x2_8 (dst >> G_SHIFT, ~a)) << G_SHIFT); } static cairo_status_t |