diff options
author | Edward Hervey <bilboed@bilboed.com> | 2009-06-30 12:40:02 +0200 |
---|---|---|
committer | Edward Hervey <bilboed@bilboed.com> | 2009-07-10 14:37:10 +0200 |
commit | 3c88249d48870b826fd89d287ee6d46b284c4f45 (patch) | |
tree | ac73478af8417ae93ea0967805da1e7728d27d50 /gst/videomixer/blend_i420.c | |
parent | ace4cb229542ae2c4ca8331d840e6bb3acd03c22 (diff) |
videomixer: I420 blending : Fix main algorithm.
When blending a source layer with an alpha of 'a' on top of another
destination layer we take the sum of:
* 'a' percent of the source layer
* (100 - 'a') percent of the destination layer (the remainder)
Diffstat (limited to 'gst/videomixer/blend_i420.c')
-rw-r--r-- | gst/videomixer/blend_i420.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gst/videomixer/blend_i420.c b/gst/videomixer/blend_i420.c index 8d7399bc..e24d0ad4 100644 --- a/gst/videomixer/blend_i420.c +++ b/gst/videomixer/blend_i420.c @@ -192,7 +192,7 @@ gst_i420_do_blend (guint8 * src, guint8 * dest, int i, j; for (i = 0; i < src_height; i++) { for (j = 0; j < src_width; j++) { - *dest = src_alpha * (*dest) + (1. - src_alpha) * (*src); + *dest = src_alpha * (*src) + (1. - src_alpha) * (*dest); dest++; src++; } |