commit b384c0cc8c69783495e1f21f3fd0f3e6253645b1 parent 8a2f7656c100fe9062782977ec5c82212d092ab9 Author: Mattias Andrée <maandree@kth.se> Date: Fri, 14 Jul 2017 00:44:45 +0200 Improve performance of blind-stack Signed-off-by: Mattias Andrée <maandree@kth.se> Diffstat:
| M | src/blind-stack.c | | | 9 | +++++---- |
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/src/blind-stack.c b/src/blind-stack.c @@ -20,10 +20,11 @@ USAGE("[-bs] bottom-stream ... top-stream") a2 = ((TYPE *)(streams[j].buf + i))[3];\ if (BLEND)\ a2 /= (TYPE)(j + 1);\ - x1 = x1 * a1 * (1 - a2) + x2 * a2;\ - y1 = y1 * a1 * (1 - a2) + y2 * a2;\ - z1 = z1 * a1 * (1 - a2) + z2 * a2;\ - a1 = a1 * (1 - a2) + a2;\ + a1 *= 1 - a2;\ + x1 = x1 * a1 + x2 * a2;\ + y1 = y1 * a1 + y2 * a2;\ + z1 = z1 * a1 + z2 * a2;\ + a1 += a2;\ }\ ((TYPE *)(streams[0].buf + i))[0] = x1;\ ((TYPE *)(streams[0].buf + i))[1] = y1;\