speed up xx44 alphablending of large transparent areas

CVS patchset: 7519
CVS date: 2005/05/04 04:30:09

2 files changed, 6 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index ec93aca7e..734c9fc17 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,11 +4,12 @@ xine-lib (1.0.2)
   * fixed xxmc / xvmc mocomp / IDCT rendering errors caused by the big update. 
   * support --enable-fpic with recent versions of gcc
   * clip goom fps value to >= 1 [bug #1193783]
-  * fixed xvmc plugin segfault when it tried software blending on nonexistant xv image.
+  * fixed xvmc plugin segfault when it tried software blending on nonexistant xv image
   * cleaned up libmpeg2 behaviour on xxmc plugin abrupt software fallback
   * use -fno-inline-functions with gcc < 3.4.0 (bug known to be in 3.3.5)
   * fix xxmc plugin wanting to change vld xvmc context when stream changes from
     non-interlaced to interlaced [bug #1194350]
+  * speed up xx44 alphablending of large transparent areas
 
 xine-lib (1.0.1)
   * Big XvMC quality / correctness / cpu-usage fix. [bug #1114517] 
diff --git a/src/video_out/alphablend.c b/src/video_out/alphablend.c
index b2ac9f2ac..2f840a31e 100644
--- a/src/video_out/alphablend.c
+++ b/src/video_out/alphablend.c
@@ -1639,7 +1639,10 @@ static int xx44_paletteIndex(xx44_palette_t *p, int color, uint32_t clut)
 
 static void memblend_xx44(uint8_t *mem,uint8_t val, register size_t size, uint8_t mask)
 {
-  register uint8_t masked_val = val & mask;
+  register uint8_t 
+    masked_val;
+
+  if (0 == (masked_val = val & mask)) return;
 
   while(size--) {
     if ((*mem & mask) <= masked_val ) *mem = val;