branch: master
commit 8ae1dcb67bc7bf333a9baa4fc8b36800efc8df62
Author: fabacino <[email protected]>
Commit: Oleh Krehel <[email protected]>
colir.el: Fix checkdoc warnings
---
colir.el | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/colir.el b/colir.el
index 9ab724f..210ec8f 100644
--- a/colir.el
+++ b/colir.el
@@ -53,7 +53,10 @@
(- 1 (* 2 (- 1 a) (- 1 b)))))
(defun colir-compose-alpha (a b &optional alpha gamma)
- "Compose A and B channels."
+ "Compose A and B channels.
+Optional argument ALPHA is a number between 0.0 and 1.0 which corresponds
+to the influence of A on the result. Default value is 0.5.
+Optional argument GAMMA is used for gamma correction. Default value is 2.2."
(setq alpha (or alpha 0.5))
(setq gamma (or gamma 2.2))
(+ (* (expt a gamma) alpha) (* (expt b gamma) (- 1 alpha))))
