From c7c1e5338cd4d47168fd2654ae951955578bef8d Mon Sep 17 00:00:00 2001
From: =?utf8?q?Michel=20D=C3=A4nzer?= <daenzer@vmware.com>
Date: Wed, 5 Jan 2011 11:41:56 +0100
Subject: [PATCH] st/xorg: Flesh out colour map support and support depth 8.

---
 src/gallium/state_trackers/xorg/xorg_crtc.c   | 15 ++++-
 src/gallium/state_trackers/xorg/xorg_driver.c | 65 +++++++++++++++++++
 .../state_trackers/xorg/xorg_tracker.h        |  1 +
 3 files changed, 80 insertions(+), 1 deletion(-)

diff --git a/src/gallium/state_trackers/xorg/xorg_crtc.c b/src/gallium/state_trackers/xorg/xorg_crtc.c
index 28e30e09ff3..71f7b8c21d0 100644
--- a/src/gallium/state_trackers/xorg/xorg_crtc.c
+++ b/src/gallium/state_trackers/xorg/xorg_crtc.c
@@ -133,6 +133,16 @@ crtc_set_mode_major(xf86CrtcPtr crtc, DisplayModePtr mode,
     if (ret)
 	return FALSE;
 
+    /* Only set gamma when needed, to avoid unneeded delays. */
+#if defined(XF86_CRTC_VERSION) && XF86_CRTC_VERSION >= 3
+    if (!crtc->active)
+#endif
+	crtc->funcs->gamma_set(crtc, crtc->gamma_red, crtc->gamma_green,
+			       crtc->gamma_blue, crtc->gamma_size);
+
+#if defined(XF86_CRTC_VERSION) && XF86_CRTC_VERSION >= 3
+    crtc->active = TRUE;
+#endif
     crtc->x = x;
     crtc->y = y;
     crtc->mode = *mode;
@@ -145,7 +155,10 @@ static void
 crtc_gamma_set(xf86CrtcPtr crtc, CARD16 * red, CARD16 * green, CARD16 * blue,
 	       int size)
 {
-    /* XXX: hockup */
+    modesettingPtr ms = modesettingPTR(crtc->scrn);
+    struct crtc_private *crtcp = crtc->driver_private;
+
+    drmModeCrtcSetGamma(ms->fd, crtcp->drm_crtc->crtc_id, size, red, green, blue);
 }
 
 #if 0 /* Implement and enable to enable rotation and reflection. */
diff --git a/src/gallium/state_trackers/xorg/xorg_driver.c b/src/gallium/state_trackers/xorg/xorg_driver.c
index 66685ecec64..33bcacdcc2e 100644
--- a/src/gallium/state_trackers/xorg/xorg_driver.c
+++ b/src/gallium/state_trackers/xorg/xorg_driver.c
@@ -44,6 +44,7 @@
 #include "xf86Crtc.h"
 #include "miscstruct.h"
 #include "dixstruct.h"
+#include "xf86cmap.h"
 #include "xf86xv.h"
 #include "xorgVersion.h"
 #ifndef XSERVER_LIBPCIACCESS
@@ -414,6 +415,7 @@ drv_pre_init(ScrnInfoPtr pScrn, int flags)
 	return FALSE;
 
     switch (pScrn->depth) {
+    case 8:
     case 15:
     case 16:
     case 24:
@@ -677,6 +679,65 @@ drv_set_master(ScrnInfoPtr pScrn)
 }
 
 
+static void drv_load_palette(ScrnInfoPtr pScrn, int numColors,
+			     int *indices, LOCO *colors, VisualPtr pVisual)
+{
+    xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
+    modesettingPtr ms = modesettingPTR(pScrn);
+    int index, j, i;
+    int c;
+
+    switch(pScrn->depth) {
+    case 15:
+	for (i = 0; i < numColors; i++) {
+	    index = indices[i];
+	    for (j = 0; j < 8; j++) {
+		ms->lut_r[index * 8 + j] = colors[index].red << 8;
+		ms->lut_g[index * 8 + j] = colors[index].green << 8;
+		ms->lut_b[index * 8 + j] = colors[index].blue << 8;
+	    }
+	}
+	break;
+    case 16:
+	for (i = 0; i < numColors; i++) {
+	    index = indices[i];
+
+	    if (index < 32) {
+		for (j = 0; j < 8; j++) {
+		    ms->lut_r[index * 8 + j] = colors[index].red << 8;
+		    ms->lut_b[index * 8 + j] = colors[index].blue << 8;
+		}
+	    }
+
+	    for (j = 0; j < 4; j++) {
+		ms->lut_g[index * 4 + j] = colors[index].green << 8;
+	    }
+	}
+	break;
+    default:
+	for (i = 0; i < numColors; i++) {
+	    index = indices[i];
+	    ms->lut_r[index] = colors[index].red << 8;
+	    ms->lut_g[index] = colors[index].green << 8;
+	    ms->lut_b[index] = colors[index].blue << 8;
+	}
+	break;
+    }
+
+    for (c = 0; c < xf86_config->num_crtc; c++) {
+	xf86CrtcPtr crtc = xf86_config->crtc[c];
+
+	/* Make the change through RandR */
+#ifdef RANDR_12_INTERFACE
+	if (crtc->randr_crtc)
+	    RRCrtcGammaSet(crtc->randr_crtc, ms->lut_r, ms->lut_g, ms->lut_b);
+	else
+#endif
+	    crtc->funcs->gamma_set(crtc, ms->lut_r, ms->lut_g, ms->lut_b, 256);
+    }
+}
+
+
 static Bool
 drv_screen_init(int scrnIndex, ScreenPtr pScreen, int argc, char **argv)
 {
@@ -816,6 +877,10 @@ drv_screen_init(int scrnIndex, ScreenPtr pScreen, int argc, char **argv)
 
     if (!miCreateDefColormap(pScreen))
 	return FALSE;
+    if (!xf86HandleColormaps(pScreen, 256, 8, drv_load_palette, NULL,
+			     CMAP_PALETTED_TRUECOLOR |
+			     CMAP_RELOAD_ON_MODE_SWITCH))
+	return FALSE;
 
     xf86DPMSInit(pScreen, xf86DPMSSet, 0);
 
diff --git a/src/gallium/state_trackers/xorg/xorg_tracker.h b/src/gallium/state_trackers/xorg/xorg_tracker.h
index 56397b8fea8..664e8c75730 100644
--- a/src/gallium/state_trackers/xorg/xorg_tracker.h
+++ b/src/gallium/state_trackers/xorg/xorg_tracker.h
@@ -129,6 +129,7 @@ typedef struct _modesettingRec
     /* kms */
     struct kms_driver *kms;
     struct kms_bo *root_bo;
+    uint16_t lut_r[256], lut_g[256], lut_b[256];
 
     /* gallium */
     struct pipe_screen *screen;
-- 
2.30.2