File U_xfree86-handle-no-palette-case-better-in-xf86RandR12CrtcSetGamma.patch of Package xorg-x11-server.24940

Git-commit: a446ff84de2dd29439521f6e87d75bde3bbf002c
Author: =?UTF-8?q?Michel=20D=C3=A4nzer?= <michel.daenzer@amd.com>
Subject: xfree86/modes: Handle no palette case better in xf86RandR12CrtcSetGamma
References: bnc#1029093 fdo#97154
Signed-off-by: Michal Srb <msrb@suse.com>

Just use the RandR gamma ramp directly.

Fixes random on-monitor colours with drivers which don't call
xf86HandleColormaps, e.g. modesetting.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97154

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/hw/xfree86/modes/xf86RandR12.c b/hw/xfree86/modes/xf86RandR12.c
index 1e9cbd3..b136123 100644
--- a/hw/xfree86/modes/xf86RandR12.c
+++ b/hw/xfree86/modes/xf86RandR12.c
@@ -1310,9 +1310,17 @@ xf86RandR12CrtcSetGamma(ScreenPtr pScreen, RRCrtcPtr randr_crtc)
 
     if (randrp->palette_size) {
         xf86RandR12CrtcComputeGamma(pScreen, randr_crtc);
-        xf86RandR12CrtcReloadGamma(randr_crtc);
+    } else {
+        memcpy(crtc->gamma_red, randr_crtc->gammaRed,
+               crtc->gamma_size * sizeof(crtc->gamma_red[0]));
+        memcpy(crtc->gamma_green, randr_crtc->gammaGreen,
+               crtc->gamma_size * sizeof(crtc->gamma_green[0]));
+        memcpy(crtc->gamma_blue, randr_crtc->gammaBlue,
+               crtc->gamma_size * sizeof(crtc->gamma_blue[0]));
     }
 
+    xf86RandR12CrtcReloadGamma(randr_crtc);
+
     return TRUE;
 }