+ Image caching for the gtk2 pixbuf producer

[melted] / src / modules / plus / filter_invert.c

diff --git a/src/modules/plus/filter_invert.c b/src/modules/plus/filter_invert.c
index 407a587..f36ffb9 100644 (file)
--- a/src/modules/plus/filter_invert.c
+++ b/src/modules/plus/filter_invert.c
@@ -25,6 +25,12 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
+#include <string.h>
+
+static inline int clamp( int v, int l, int u )
+{
+       return v < l ? l : ( v > u ? u : v );
+}
 
 /** Do it :-).
 */
@@ -32,6 +38,8 @@
 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
@@ -43,8 +51,15 @@ 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 );
+               }
+
+               if ( mask )
+               {
+                       uint8_t *alpha = mlt_frame_get_alpha_mask( this );
+                       int size = *width * *height;
+                       memset( alpha, mask, size );
                }
        }
 
@@ -57,6 +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;
 }