From 77ec0f850d1e096ca72dab0675da62bcfb11845f Mon Sep 17 00:00:00 2001
From: reimar <reimar@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Fri, 19 Aug 2005 12:23:34 +0000
Subject: [PATCH] less weird OSD alpha transformation.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@16273 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 libvo/vo_gl.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libvo/vo_gl.c b/libvo/vo_gl.c
index 775d7333c0..f0b9d311c8 100644
--- a/libvo/vo_gl.c
+++ b/libvo/vo_gl.c
@@ -331,8 +331,10 @@ static void create_osd_texture(int x0, int y0, int w, int h,
   {
   int i;
   char *tmp = (char *)malloc(stride * h);
-  for (i = 0; i < h * stride; i++)
-    tmp[i] = ~(-srca[i]);
+  // convert alpha from weird MPlayer scale.
+  // in-place is not possible since it is reused for future OSDs
+  for (i = h * stride; i; i--)
+    tmp[i] = srca[i] - 1;
   glUploadTex(gl_target, GL_ALPHA, GL_UNSIGNED_BYTE, tmp, stride,
               0, 0, w, h, 0);
   free(tmp);