commit b384c0cc8c69783495e1f21f3fd0f3e6253645b1
Author: Mattias Andrée <[email protected]>
AuthorDate: Fri Jul 14 00:44:45 2017 +0200
Commit: Mattias Andrée <[email protected]>
CommitDate: Fri Jul 14 00:44:45 2017 +0200
Improve performance of blind-stack
Signed-off-by: Mattias Andrée <[email protected]>
diff --git a/src/blind-stack.c b/src/blind-stack.c
index bff2923..c317bf5 100644
--- 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;\
