randr12: Add compatibility for XF86VidMode gamma ramps.

Fixes screensaver fadeout effects.

Also make all RandR 1.2 compatibility code for XF86VidMode operate only on the
CRTC associated with the compatibility output, not all CRTCs at once.

1 files changed, 7 insertions, 12 deletions

diff --git a/hw/xfree86/modes/xf86RandR12.c b/hw/xfree86/modes/xf86RandR12.c
index 0de21e253..c2465bce3 100644
--- a/hw/xfree86/modes/xf86RandR12.c
+++ b/hw/xfree86/modes/xf86RandR12.c
@@ -1718,13 +1718,11 @@ gamma_to_ramp(float gamma, CARD16 *ramp, int size)
 static int
 xf86RandR12ChangeGamma(int scrnIndex, Gamma gamma)
 {
-    int i, size = 0;
     CARD16 *points, *red, *green, *blue;
     ScrnInfoPtr pScrn = xf86Screens[scrnIndex];
-    rrScrPrivPtr rp = rrGetScrPriv(pScrn->pScreen);
-
-    for (i = 0; i < rp->numCrtcs; i++)
-	size = max(size, rp->crtcs[i]->gammaSize);
+    xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(pScrn);
+    RRCrtcPtr crtc = config->output[config->compat_output]->crtc->randr_crtc;
+    int size = max(0, crtc->gammaSize);
 
     if (!size)
 	return Success;
@@ -1737,13 +1735,10 @@ xf86RandR12ChangeGamma(int scrnIndex, Gamma gamma)
     green = points + size;
     blue = points + 2 * size;
 
-    for (i = 0; i < rp->numCrtcs; i++) {
-	gamma_to_ramp(gamma.red, red, rp->crtcs[i]->gammaSize);
-	gamma_to_ramp(gamma.green, green, rp->crtcs[i]->gammaSize);
-	gamma_to_ramp(gamma.blue, blue, rp->crtcs[i]->gammaSize);
-	RRCrtcGammaSet(rp->crtcs[i], red, green, blue);
-	memset(points, 0, 3 * size * sizeof(CARD16));
-    }
+    gamma_to_ramp(gamma.red, red, size);
+    gamma_to_ramp(gamma.green, green, size);
+    gamma_to_ramp(gamma.blue, blue, size);
+    RRCrtcGammaSet(crtc, red, green, blue);
 
     xfree(points);