Improve performance of blind-stack - blind - suckless command-line video editing utility
HTML git clone git://git.suckless.org/blind
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
DIR commit b384c0cc8c69783495e1f21f3fd0f3e6253645b1
DIR parent 8a2f7656c100fe9062782977ec5c82212d092ab9
HTML 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(-)
---
DIR 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;\