+ Small mod to allow better use of invert as a gui item selector (alpha property)

git-svn-id: https://mlt.svn.sourceforge.net/svnroot/mlt/trunk/mlt@823 d19143bc-622f-0410-bfdd-b5b2a6649095

diff --git a/src/modules/plus/filter_invert.c b/src/modules/plus/filter_invert.c
index 3eb8c4a9657fdc581617cb48453fb23c199fc4c8..f36ffb99fada755ac95865cee1c76b2899b34741 100644 (file)
--- a/src/modules/plus/filter_invert.c
+++ b/src/modules/plus/filter_invert.c
@@ -25,6 +25,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
+#include <string.h>
 
 static inline int clamp( int v, int l, int u )
 {
@@ -37,6 +38,8 @@ static inline int clamp( int v, int l, int u )
 static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
 {
        // Get the image
+       mlt_filter filter = mlt_frame_pop_service( this );
+       int mask = mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter ), "alpha" );
        int error = mlt_frame_get_image( this, image, format, width, height, 1 );
 
        // Only process if we have no error and a valid colour space
@@ -51,6 +54,13 @@ static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *
                        *p ++ = clamp( 251 - *r ++, 16, 235 );
                        *p ++ = clamp( 256 - *r ++, 16, 240 );
                }
+
+               if ( mask )
+               {
+                       uint8_t *alpha = mlt_frame_get_alpha_mask( this );
+                       int size = *width * *height;
+                       memset( alpha, mask, size );
+               }
        }
 
        return error;
@@ -62,6 +72,7 @@ static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *
 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
 {
        // Push the frame filter
+       mlt_frame_push_service( frame, this );
        mlt_frame_push_get_image( frame, filter_get_image );
        return frame;
 }