media-libs/libsdl/files/libsdl-1.2.15-gamma.patch

   1 From 4b56fa058a45b7c804d1a5fcaf7a70db0bd0581c Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <petr.pisar@atlas.cz>
   3 Date: Tue, 1 Jan 2013 21:25:15 +0100
   4 Subject: [PATCH] x11: Bypass SetGammaRamp when changing gamma
   5
   6 Recent Xorg has broken dynamic colors setting, so calling SDL_SetGamme()
   7 does not have any effect here. Recent means xorg-server >= 1.7, since 2010.
   8 See <https://bugs.freedesktop.org/show_bug.cgi?id=27222>.
   9 ---
  10  src/video/SDL_gamma.c |   15 ++-------------
  11  1 files changed, 2 insertions(+), 13 deletions(-)
  12
  13 --- a/src/video/SDL_gamma.c
  14 +++ b/src/video/SDL_gamma.c
  15 @@ -92,22 +92,11 @@ static void CalculateGammaFromRamp(float *gamma, Uint16 *ramp)
  16
  17  int SDL_SetGamma(float red, float green, float blue)
  18  {
  19 -       int succeeded;
  20 +       int succeeded = -1;
  21         SDL_VideoDevice *video = current_video;
  22         SDL_VideoDevice *this  = current_video;
  23
  24 -       succeeded = -1;
  25 -       /* Prefer using SetGammaRamp(), as it's more flexible */
  26 -       {
  27 -               Uint16 ramp[3][256];
  28 -
  29 -               CalculateGammaRamp(red, ramp[0]);
  30 -               CalculateGammaRamp(green, ramp[1]);
  31 -               CalculateGammaRamp(blue, ramp[2]);
  32 -               succeeded = SDL_SetGammaRamp(ramp[0], ramp[1], ramp[2]);
  33 -       }
  34 -       if ( (succeeded < 0) && video->SetGamma ) {
  35 -               SDL_ClearError();
  36 +       if ( video->SetGamma ) {
  37                 succeeded = video->SetGamma(this, red, green, blue);
  38         }
  39         return succeeded;
  40 --
  41 1.7.8.6
  42