From: lilo_booter <lilo_booter@d19143bc-622f-0410-bfdd-b5b2a6649095>
Date: Sat, 31 Jul 2004 20:39:44 +0000 (+0000)
Subject: Minor fix to invert
X-Git-Url: http://research.m1stereo.tv/gitweb?a=commitdiff_plain;h=97c21a27771dea7705e3293e9da519976add814b;p=melted

Minor fix to invert


git-svn-id: https://mlt.svn.sourceforge.net/svnroot/mlt/trunk/mlt@348 d19143bc-622f-0410-bfdd-b5b2a6649095
---

diff --git a/src/modules/plus/filter_invert.c b/src/modules/plus/filter_invert.c
index 407a587..3eb8c4a 100644
--- a/src/modules/plus/filter_invert.c
+++ b/src/modules/plus/filter_invert.c
@@ -26,6 +26,11 @@
 #include <stdlib.h>
 #include <math.h>
 
+static inline int clamp( int v, int l, int u )
+{
+	return v < l ? l : ( v > u ? u : v );
+}
+
 /** Do it :-).
 */
 
@@ -43,8 +48,8 @@ static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *
 
 		while ( p != q )
 		{
-			*p ++ = 251 - *r ++;
-			*p ++ = 251 - *r ++;
+			*p ++ = clamp( 251 - *r ++, 16, 235 );
+			*p ++ = clamp( 256 - *r ++, 16, 240 );
 		}
 	}