Author: kelnos
Date: 2007-02-25 01:47:21 +0000 (Sun, 25 Feb 2007)
New Revision: 25031
Modified:
xfdesktop/branches/xfce_4_4/src/xfce-backdrop.c
Log:
backport fix for bug #2939
Modified: xfdesktop/branches/xfce_4_4/src/xfce-backdrop.c
===================================================================
--- xfdesktop/branches/xfce_4_4/src/xfce-backdrop.c 2007-02-25 01:37:08 UTC
(rev 25030)
+++ xfdesktop/branches/xfce_4_4/src/xfce-backdrop.c 2007-02-25 01:47:21 UTC
(rev 25031)
@@ -575,11 +575,27 @@
} else
istyle = backdrop->priv->image_style;
- if(backdrop->priv->bpp < 24)
- interp = GDK_INTERP_HYPER;
- else
- interp = GDK_INTERP_BILINEAR;
+ /* if the image is the same as the screen size, there's no reason to do
+ * any scaling at all */
+ if(w == iw && h == ih)
+ istyle = XFCE_BACKDROP_IMAGE_CENTERED;
+ /* if we don't need to do any scaling, don't do any interpolation. this
+ * fixes a problem where hyper/bilinear filtering causes blurriness in
+ * some images. http://bugzilla.xfce.org/show_bug.cgi?id=2939 */
+ if(XFCE_BACKDROP_IMAGE_TILED == istyle
+ || XFCE_BACKDROP_IMAGE_CENTERED == istyle)
+ {
+ interp = GDK_INTERP_NEAREST;
+ } else {
+ /* if the screen has a bit depth of less than 24bpp, using bilinear
+ * filtering looks crappy (mainly with gradients). */
+ if(backdrop->priv->bpp < 24)
+ interp = GDK_INTERP_HYPER;
+ else
+ interp = GDK_INTERP_BILINEAR;
+ }
+
switch(istyle) {
case XFCE_BACKDROP_IMAGE_CENTERED:
dx = MAX((w - iw) / 2, 0);
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