replaced binary operations with a naive but faster implementation using a

2005-09-28  Sven Neumann  <sven@gimp.org>

	* app/paint-funcs/paint-funcs-generic.h (swap_pixels): replaced
	binary operations with a naive but faster implementation using a
	local variable.

	* app/composite/gimp-composite-generic.c
	(gimp_composite_swap_any_any_any_generic): same change here.

ChangeLog

 2005-09-28  Sven Neumann  <sven@gimp.org>
 
 	* app/paint-funcs/paint-funcs-generic.h (swap_pixels): replaced
-	the binary XOR operations with a naive but faster implementation
-	using a local variable.
+	binary operations with a naive but faster implementation using a
+	local variable.
+
+	* app/composite/gimp-composite-generic.c
+	(gimp_composite_swap_any_any_any_generic): same change here.
 
 2005-09-27  Sven Neumann  <sven@gimp.org>
 

app/composite/gimp-composite-generic.c

@@ -1318,17 +1318,18 @@ gimp_composite_replace_any_any_any_generic (GimpCompositeContext *ctx)
 void
 gimp_composite_swap_any_any_any_generic (GimpCompositeContext * ctx)
 {
-  guint length;
   guchar *src = ctx->A;
   guchar *dest = ctx->B;
   guint bytes1 = gimp_composite_pixel_bpp[ctx->pixelformat_A];
-  length = ctx->n_pixels * bytes1;
+  guint length = ctx->n_pixels * bytes1;
 
   while (length--)
     {
-      *src = *src ^ *dest;
-      *dest = *dest ^ *src;
-      *src = *src ^ *dest;
+      guchar tmp = *dest;
+
+      *dest = *src;
+      *src = tmp;
+
       src++;
       dest++;
     }