From: havoc <havoc@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Mon, 30 Jan 2006 13:34:01 +0000 (+0000)
Subject: disable hardware gamma if XF86VidModeGetGammaRampSize reports a size other than 256... 
X-Git-Tag: xonotic-v0.1.0preview~4369
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=890d4c00928b263763b460cb6f5b6a828fd4afc7;p=xonotic%2Fdarkplaces.git

disable hardware gamma if XF86VidModeGetGammaRampSize reports a size other than 256, for instance 1024 on Quadro


git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@5927 d7cf8633-e32d-0410-b094-e92efae38249
---

diff --git a/vid_glx.c b/vid_glx.c
index 8f477f3e..ebb7f49b 100644
--- a/vid_glx.c
+++ b/vid_glx.c
@@ -591,11 +591,23 @@ void VID_Finish (void)
 
 int VID_SetGamma(unsigned short *ramps)
 {
+	int rampsize;
+	// FIXME: it would be good to generate ramps of the size reported by X,
+	// for instance Quadro cards seem to use 1024 color ramps not 256
+	if(!XF86VidModeGetGammaRampSize(vidx11_display, vidx11_screen, &rampsize))
+		return 0;
+	if(rampsize != 256)
+		return 0;
 	return XF86VidModeSetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 }
 
 int VID_GetGamma(unsigned short *ramps)
 {
+	int rampsize;
+	if(!XF86VidModeGetGammaRampSize(vidx11_display, vidx11_screen, &rampsize))
+		return 0;
+	if(rampsize != 256)
+		return 0;
 	return XF86VidModeGetGammaRamp(vidx11_display, vidx11_screen, 256, ramps, ramps + 256, ramps + 512);
 }