moving from https://github.com/perberos/mate-desktop-environment

1 files changed, 1824 insertions, 0 deletions

diff --git a/libmate-desktop/mate-rr.c b/libmate-desktop/mate-rr.c
new file mode 100644
index 0000000..5c73ce9
--- /dev/null
+++ b/libmate-desktop/mate-rr.c
@@ -0,0 +1,1824 @@
+/* mate-rr.c
+ *
+ * Copyright 2007, 2008, Red Hat, Inc.
+ * 
+ * This file is part of the Mate Library.
+ * 
+ * The Mate Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Mate Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Library General Public
+ * License along with the Mate Library; see the file COPYING.LIB.  If not,
+ * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ * 
+ * Author: Soren Sandmann <[email protected]>
+ */
+
+#define MATE_DESKTOP_USE_UNSTABLE_API
+
+#include <config.h>
+#include <glib/gi18n-lib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+
+#ifdef HAVE_RANDR
+#include <X11/extensions/Xrandr.h>
+#endif
+
+#include <gtk/gtk.h>
+#include <gdk/gdkx.h>
+#include <X11/Xatom.h>
+
+#undef MATE_DISABLE_DEPRECATED
+#include "libmateui/mate-rr.h"
+
+#include "private.h"
+#include "mate-rr-private.h"
+
+#define DISPLAY(o) ((o)->info->screen->xdisplay)
+
+#ifndef HAVE_RANDR
+/* This is to avoid a ton of ifdefs wherever we use a type from libXrandr */
+typedef int RROutput;
+typedef int RRCrtc;
+typedef int RRMode;
+typedef int Rotation;
+#define RR_Rotate_0		1
+#define RR_Rotate_90		2
+#define RR_Rotate_180		4
+#define RR_Rotate_270		8
+#define RR_Reflect_X		16
+#define RR_Reflect_Y		32
+#endif
+
+struct MateRROutput
+{
+    ScreenInfo *	info;
+    RROutput		id;
+    
+    char *		name;
+    MateRRCrtc *	current_crtc;
+    gboolean		connected;
+    gulong		width_mm;
+    gulong		height_mm;
+    MateRRCrtc **	possible_crtcs;
+    MateRROutput **	clones;
+    MateRRMode **	modes;
+    int			n_preferred;
+    guint8 *		edid_data;
+    char *              connector_type;
+};
+
+struct MateRROutputWrap
+{
+    RROutput		id;
+};
+
+struct MateRRCrtc
+{
+    ScreenInfo *	info;
+    RRCrtc		id;
+    
+    MateRRMode *	current_mode;
+    MateRROutput **	current_outputs;
+    MateRROutput **	possible_outputs;
+    int			x;
+    int			y;
+    
+    MateRRRotation	current_rotation;
+    MateRRRotation	rotations;
+    int			gamma_size;
+};
+
+struct MateRRMode
+{
+    ScreenInfo *	info;
+    RRMode		id;
+    char *		name;
+    int			width;
+    int			height;
+    int			freq;		/* in mHz */
+};
+
+/* MateRRCrtc */
+static MateRRCrtc *  crtc_new          (ScreenInfo         *info,
+					 RRCrtc              id);
+static void           crtc_free         (MateRRCrtc        *crtc);
+
+#ifdef HAVE_RANDR
+static gboolean       crtc_initialize   (MateRRCrtc        *crtc,
+					 XRRScreenResources *res,
+					 GError            **error);
+#endif
+
+/* MateRROutput */
+static MateRROutput *output_new        (ScreenInfo         *info,
+					 RROutput            id);
+
+#ifdef HAVE_RANDR
+static gboolean       output_initialize (MateRROutput      *output,
+					 XRRScreenResources *res,
+					 GError            **error);
+#endif
+
+static void           output_free       (MateRROutput      *output);
+
+/* MateRRMode */
+static MateRRMode *  mode_new          (ScreenInfo         *info,
+					 RRMode              id);
+
+#ifdef HAVE_RANDR
+static void           mode_initialize   (MateRRMode        *mode,
+					 XRRModeInfo        *info);
+#endif
+
+static void           mode_free         (MateRRMode        *mode);
+
+
+/* Errors */
+
+/**
+ * mate_rr_error_quark:
+ *
+ * Returns the #GQuark that will be used for #GError values returned by the
+ * MateRR API.
+ *
+ * Return value: a #GQuark used to identify errors coming from the MateRR API.
+ */
+GQuark
+mate_rr_error_quark (void)
+{
+    return g_quark_from_static_string ("mate-rr-error-quark");
+}
+
+/* Screen */
+static MateRROutput *
+mate_rr_output_by_id (ScreenInfo *info, RROutput id)
+{
+    MateRROutput **output;
+    
+    g_assert (info != NULL);
+    
+    for (output = info->outputs; *output; ++output)
+    {
+	if ((*output)->id == id)
+	    return *output;
+    }
+    
+    return NULL;
+}
+
+static MateRRCrtc *
+crtc_by_id (ScreenInfo *info, RRCrtc id)
+{
+    MateRRCrtc **crtc;
+    
+    if (!info)
+        return NULL;
+    
+    for (crtc = info->crtcs; *crtc; ++crtc)
+    {
+	if ((*crtc)->id == id)
+	    return *crtc;
+    }
+    
+    return NULL;
+}
+
+static MateRRMode *
+mode_by_id (ScreenInfo *info, RRMode id)
+{
+    MateRRMode **mode;
+    
+    g_assert (info != NULL);
+    
+    for (mode = info->modes; *mode; ++mode)
+    {
+	if ((*mode)->id == id)
+	    return *mode;
+    }
+    
+    return NULL;
+}
+
+static void
+screen_info_free (ScreenInfo *info)
+{
+    MateRROutput **output;
+    MateRRCrtc **crtc;
+    MateRRMode **mode;
+    
+    g_assert (info != NULL);
+
+#ifdef HAVE_RANDR
+    if (info->resources)
+    {
+	XRRFreeScreenResources (info->resources);
+	
+	info->resources = NULL;
+    }
+#endif
+    
+    if (info->outputs)
+    {
+	for (output = info->outputs; *output; ++output)
+	    output_free (*output);
+	g_free (info->outputs);
+    }
+    
+    if (info->crtcs)
+    {
+	for (crtc = info->crtcs; *crtc; ++crtc)
+	    crtc_free (*crtc);
+	g_free (info->crtcs);
+    }
+    
+    if (info->modes)
+    {
+	for (mode = info->modes; *mode; ++mode)
+	    mode_free (*mode);
+	g_free (info->modes);
+    }
+
+    if (info->clone_modes)
+    {
+	/* The modes themselves were freed above */
+	g_free (info->clone_modes);
+    }
+    
+    g_free (info);
+}
+
+static gboolean
+has_similar_mode (MateRROutput *output, MateRRMode *mode)
+{
+    int i;
+    MateRRMode **modes = mate_rr_output_list_modes (output);
+    int width = mate_rr_mode_get_width (mode);
+    int height = mate_rr_mode_get_height (mode);
+
+    for (i = 0; modes[i] != NULL; ++i)
+    {
+	MateRRMode *m = modes[i];
+
+	if (mate_rr_mode_get_width (m) == width	&&
+	    mate_rr_mode_get_height (m) == height)
+	{
+	    return TRUE;
+	}
+    }
+
+    return FALSE;
+}
+
+static void
+gather_clone_modes (ScreenInfo *info)
+{
+    int i;
+    GPtrArray *result = g_ptr_array_new ();
+
+    for (i = 0; info->outputs[i] != NULL; ++i)
+    {
+	int j;
+	MateRROutput *output1, *output2;
+
+	output1 = info->outputs[i];
+	
+	if (!output1->connected)
+	    continue;
+	
+	for (j = 0; output1->modes[j] != NULL; ++j)
+	{
+	    MateRRMode *mode = output1->modes[j];
+	    gboolean valid;
+	    int k;
+
+	    valid = TRUE;
+	    for (k = 0; info->outputs[k] != NULL; ++k)
+	    {
+		output2 = info->outputs[k];
+		
+		if (!output2->connected)
+		    continue;
+		
+		if (!has_similar_mode (output2, mode))
+		{
+		    valid = FALSE;
+		    break;
+		}
+	    }
+
+	    if (valid)
+		g_ptr_array_add (result, mode);
+	}
+    }
+
+    g_ptr_array_add (result, NULL);
+    
+    info->clone_modes = (MateRRMode **)g_ptr_array_free (result, FALSE);
+}
+
+#ifdef HAVE_RANDR
+static gboolean
+fill_screen_info_from_resources (ScreenInfo *info,
+				 XRRScreenResources *resources,
+				 GError **error)
+{
+    int i;
+    GPtrArray *a;
+    MateRRCrtc **crtc;
+    MateRROutput **output;
+
+    info->resources = resources;
+
+    /* We create all the structures before initializing them, so
+     * that they can refer to each other.
+     */
+    a = g_ptr_array_new ();
+    for (i = 0; i < resources->ncrtc; ++i)
+    {
+	MateRRCrtc *crtc = crtc_new (info, resources->crtcs[i]);
+
+	g_ptr_array_add (a, crtc);
+    }
+    g_ptr_array_add (a, NULL);
+    info->crtcs = (MateRRCrtc **)g_ptr_array_free (a, FALSE);
+
+    a = g_ptr_array_new ();
+    for (i = 0; i < resources->noutput; ++i)
+    {
+	MateRROutput *output = output_new (info, resources->outputs[i]);
+
+	g_ptr_array_add (a, output);
+    }
+    g_ptr_array_add (a, NULL);
+    info->outputs = (MateRROutput **)g_ptr_array_free (a, FALSE);
+
+    a = g_ptr_array_new ();
+    for (i = 0;  i < resources->nmode; ++i)
+    {
+	MateRRMode *mode = mode_new (info, resources->modes[i].id);
+
+	g_ptr_array_add (a, mode);
+    }
+    g_ptr_array_add (a, NULL);
+    info->modes = (MateRRMode **)g_ptr_array_free (a, FALSE);
+
+    /* Initialize */
+    for (crtc = info->crtcs; *crtc; ++crtc)
+    {
+	if (!crtc_initialize (*crtc, resources, error))
+	    return FALSE;
+    }
+
+    for (output = info->outputs; *output; ++output)
+    {
+	if (!output_initialize (*output, resources, error))
+	    return FALSE;
+    }
+
+    for (i = 0; i < resources->nmode; ++i)
+    {
+	MateRRMode *mode = mode_by_id (info, resources->modes[i].id);
+
+	mode_initialize (mode, &(resources->modes[i]));
+    }
+
+    gather_clone_modes (info);
+
+    return TRUE;
+}
+#endif /* HAVE_RANDR */
+
+static gboolean
+fill_out_screen_info (Display *xdisplay,
+		      Window xroot,
+		      ScreenInfo *info,
+		      gboolean needs_reprobe,
+		      GError **error)
+{
+#ifdef HAVE_RANDR
+    XRRScreenResources *resources;
+    
+    g_assert (xdisplay != NULL);
+    g_assert (info != NULL);
+
+    /* First update the screen resources */
+
+    if (needs_reprobe)
+        resources = XRRGetScreenResources (xdisplay, xroot);
+    else
+    {
+	/* XRRGetScreenResourcesCurrent is less expensive than
+	 * XRRGetScreenResources, however it is available only
+	 * in RandR 1.3 or higher
+	 */
+#if (RANDR_MAJOR > 1 || (RANDR_MAJOR == 1 && RANDR_MINOR >= 3))
+        /* Runtime check for RandR 1.3 or higher */
+        if (info->screen->rr_major_version == 1 && info->screen->rr_minor_version >= 3)
+            resources = XRRGetScreenResourcesCurrent (xdisplay, xroot);
+        else
+            resources = XRRGetScreenResources (xdisplay, xroot);
+#else
+        resources = XRRGetScreenResources (xdisplay, xroot);
+#endif
+    }
+
+    if (resources)
+    {
+	if (!fill_screen_info_from_resources (info, resources, error))
+	    return FALSE;
+    }
+    else
+    {
+	g_set_error (error, MATE_RR_ERROR, MATE_RR_ERROR_RANDR_ERROR,
+		     /* Translators: a CRTC is a CRT Controller (this is X terminology). */
+		     _("could not get the screen resources (CRTCs, outputs, modes)"));
+	return FALSE;
+    }
+
+    /* Then update the screen size range.  We do this after XRRGetScreenResources() so that
+     * the X server will already have an updated view of the outputs.
+     */
+
+    if (needs_reprobe) {
+	gboolean success;
+
+        gdk_error_trap_push ();
+	success = XRRGetScreenSizeRange (xdisplay, xroot,
+					 &(info->min_width),
+					 &(info->min_height),
+					 &(info->max_width),
+					 &(info->max_height));
+	gdk_flush ();
+	if (gdk_error_trap_pop ()) {
+	    g_set_error (error, MATE_RR_ERROR, MATE_RR_ERROR_UNKNOWN,
+			 _("unhandled X error while getting the range of screen sizes"));
+	    return FALSE;
+	}
+
+	if (!success) {
+	    g_set_error (error, MATE_RR_ERROR, MATE_RR_ERROR_RANDR_ERROR,
+			 _("could not get the range of screen sizes"));
+            return FALSE;
+        }
+    }
+    else
+    {
+        mate_rr_screen_get_ranges (info->screen, 
+					 &(info->min_width),
+					 &(info->max_width),
+					 &(info->min_height),
+					 &(info->max_height));
+    }
+
+    info->primary = None;
+#if (RANDR_MAJOR > 1 || (RANDR_MAJOR == 1 && RANDR_MINOR >= 3))
+    /* Runtime check for RandR 1.3 or higher */
+    if (info->screen->rr_major_version == 1 && info->screen->rr_minor_version >= 3) {
+        gdk_error_trap_push ();
+        info->primary = XRRGetOutputPrimary (xdisplay, xroot);
+	gdk_flush ();
+	gdk_error_trap_pop (); /* ignore error */
+    }
+#endif
+
+    return TRUE;
+#else
+    return FALSE;
+#endif /* HAVE_RANDR */
+}
+
+static ScreenInfo *
+screen_info_new (MateRRScreen *screen, gboolean needs_reprobe, GError **error)
+{
+    ScreenInfo *info = g_new0 (ScreenInfo, 1);
+    
+    g_assert (screen != NULL);
+    
+    info->outputs = NULL;
+    info->crtcs = NULL;
+    info->modes = NULL;
+    info->screen = screen;
+    
+    if (fill_out_screen_info (screen->xdisplay, screen->xroot, info, needs_reprobe, error))
+    {
+	return info;
+    }
+    else
+    {
+	screen_info_free (info);
+	return NULL;
+    }
+}
+
+static gboolean
+screen_update (MateRRScreen *screen, gboolean force_callback, gboolean needs_reprobe, GError **error)
+{
+    ScreenInfo *info;
+    gboolean changed = FALSE;
+    
+    g_assert (screen != NULL);
+
+    info = screen_info_new (screen, needs_reprobe, error);
+    if (!info)
+	    return FALSE;
+
+#ifdef HAVE_RANDR
+    if (info->resources->configTimestamp != screen->info->resources->configTimestamp)
+	    changed = TRUE;
+#endif
+
+    screen_info_free (screen->info);
+	
+    screen->info = info;
+
+    if ((changed || force_callback) && screen->callback)
+	screen->callback (screen, screen->data);
+    
+    return changed;
+}
+
+static GdkFilterReturn
+screen_on_event (GdkXEvent *xevent,
+		 GdkEvent *event,
+		 gpointer data)
+{
+#ifdef HAVE_RANDR
+    MateRRScreen *screen = data;
+    XEvent *e = xevent;
+    int event_num;
+
+    if (!e)
+	return GDK_FILTER_CONTINUE;
+
+    event_num = e->type - screen->randr_event_base;
+
+    if (event_num == RRScreenChangeNotify) {
+	/* We don't reprobe the hardware; we just fetch the X server's latest
+	 * state.  The server already knows the new state of the outputs; that's
+	 * why it sent us an event!
+	 */
+        screen_update (screen, TRUE, FALSE, NULL); /* NULL-GError */
+#if 0
+	/* Enable this code to get a dialog showing the RANDR timestamps, for debugging purposes */
+	{
+	    GtkWidget *dialog;
+	    XRRScreenChangeNotifyEvent *rr_event;
+	    static int dialog_num;
+
+	    rr_event = (XRRScreenChangeNotifyEvent *) e;
+
+	    dialog = gtk_message_dialog_new (NULL,
+					     0,
+					     GTK_MESSAGE_INFO,
+					     GTK_BUTTONS_CLOSE,
+					     "RRScreenChangeNotify timestamps (%d):\n"
+					     "event change: %u\n"
+					     "event config: %u\n"
+					     "event serial: %lu\n"
+					     "----------------------"
+					     "screen change: %u\n"
+					     "screen config: %u\n",
+					     dialog_num++,
+					     (guint32) rr_event->timestamp,
+					     (guint32) rr_event->config_timestamp,
+					     rr_event->serial,
+					     (guint32) screen->info->resources->timestamp,
+					     (guint32) screen->info->resources->configTimestamp);
+	    g_signal_connect (dialog, "response",
+			      G_CALLBACK (gtk_widget_destroy), NULL);
+	    gtk_widget_show (dialog);
+	}
+#endif
+    }
+#if 0
+    /* WHY THIS CODE IS DISABLED:
+     *
+     * Note that in mate_rr_screen_new(), we only select for
+     * RRScreenChangeNotifyMask.  We used to select for other values in
+     * RR*NotifyMask, but we weren't really doing anything useful with those
+     * events.  We only care about "the screens changed in some way or another"
+     * for now.
+     *
+     * If we ever run into a situtation that could benefit from processing more
+     * detailed events, we can enable this code again.
+     *
+     * Note that the X server sends RRScreenChangeNotify in conjunction with the
+     * more detailed events from RANDR 1.2 - see xserver/randr/randr.c:TellChanged().
+     */
+    else if (event_num == RRNotify)
+    {
+	/* Other RandR events */
+
+	XRRNotifyEvent *event = (XRRNotifyEvent *)e;
+
+	/* Here we can distinguish between RRNotify events supported
+	 * since RandR 1.2 such as RRNotify_OutputProperty.  For now, we
+	 * don't have anything special to do for particular subevent types, so
+	 * we leave this as an empty switch().
+	 */
+	switch (event->subtype)
+	{
+	default:
+	    break;
+	}
+
+	/* No need to reprobe hardware here */
+	screen_update (screen, TRUE, FALSE, NULL); /* NULL-GError */
+    }
+#endif
+
+#endif /* HAVE_RANDR */
+
+    /* Pass the event on to GTK+ */
+    return GDK_FILTER_CONTINUE;
+}
+
+/* Returns NULL if screen could not be created.  For instance, if
+ * the driver does not support Xrandr 1.2.
+ */
+MateRRScreen *
+mate_rr_screen_new (GdkScreen *gdk_screen,
+		     MateRRScreenChanged callback,
+		     gpointer data,
+		     GError **error)
+{
+#ifdef HAVE_RANDR
+    Display *dpy = GDK_SCREEN_XDISPLAY (gdk_screen);
+    int event_base;
+    int ignore;
+#endif
+
+    g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+    
+    _mate_desktop_init_i18n ();
+
+#ifdef HAVE_RANDR
+    if (XRRQueryExtension (dpy, &event_base, &ignore))
+    {
+	MateRRScreen *screen = g_new0 (MateRRScreen, 1);
+	
+	screen->gdk_screen = gdk_screen;
+	screen->gdk_root = gdk_screen_get_root_window (gdk_screen);
+	screen->xroot = gdk_x11_drawable_get_xid (screen->gdk_root);
+	screen->xdisplay = dpy;
+	screen->xscreen = gdk_x11_screen_get_xscreen (screen->gdk_screen);
+	screen->connector_type_atom = XInternAtom (dpy, "ConnectorType", FALSE);
+	
+	screen->callback = callback;
+	screen->data = data;
+	
+	screen->randr_event_base = event_base;
+
+	XRRQueryVersion (dpy, &screen->rr_major_version, &screen->rr_minor_version);
+	if (screen->rr_major_version > 1 || (screen->rr_major_version == 1 && screen->rr_minor_version < 2)) {
+	    g_set_error (error, MATE_RR_ERROR, MATE_RR_ERROR_NO_RANDR_EXTENSION,
+			 "RANDR extension is too old (must be at least 1.2)");
+	    g_free (screen);
+	    return NULL;
+	}
+
+	screen->info = screen_info_new (screen, TRUE, error);
+	
+	if (!screen->info) {
+	    g_free (screen);
+	    return NULL;
+	}
+
+	if (screen->callback) {
+	    XRRSelectInput (screen->xdisplay,
+			    screen->xroot,
+			    RRScreenChangeNotifyMask);
+
+	    gdk_x11_register_standard_event_type (gdk_screen_get_display (gdk_screen),
+						  event_base,
+						  RRNotify + 1);
+
+	    gdk_window_add_filter (screen->gdk_root, screen_on_event, screen);
+	}
+
+	return screen;
+    }
+    else
+    {
+#endif /* HAVE_RANDR */
+	g_set_error (error, MATE_RR_ERROR, MATE_RR_ERROR_NO_RANDR_EXTENSION,
+		     _("RANDR extension is not present"));
+	
+	return NULL;
+#ifdef HAVE_RANDR
+   }
+#endif
+}
+
+void
+mate_rr_screen_destroy (MateRRScreen *screen)
+{
+	g_return_if_fail (screen != NULL);
+
+	gdk_window_remove_filter (screen->gdk_root, screen_on_event, screen);
+
+	screen_info_free (screen->info);
+	screen->info = NULL;
+
+	g_free (screen);
+}
+
+void
+mate_rr_screen_set_size (MateRRScreen *screen,
+			  int	      width,
+			  int       height,
+			  int       mm_width,
+			  int       mm_height)
+{
+    g_return_if_fail (screen != NULL);
+
+#ifdef HAVE_RANDR
+    gdk_error_trap_push ();
+    XRRSetScreenSize (screen->xdisplay, screen->xroot,
+		      width, height, mm_width, mm_height);
+    gdk_flush ();
+    gdk_error_trap_pop (); /* ignore error */
+#endif
+}
+
+void
+mate_rr_screen_get_ranges (MateRRScreen *screen,
+			    int	          *min_width,
+			    int	          *max_width,
+			    int           *min_height,
+			    int	          *max_height)
+{
+    g_return_if_fail (screen != NULL);
+    
+    if (min_width)
+	*min_width = screen->info->min_width;
+    
+    if (max_width)
+	*max_width = screen->info->max_width;
+    
+    if (min_height)
+	*min_height = screen->info->min_height;
+    
+    if (max_height)
+	*max_height = screen->info->max_height;
+}
+
+/**
+ * mate_rr_screen_get_timestamps
+ * @screen: a #MateRRScreen
+ * @change_timestamp_ret: Location in which to store the timestamp at which the RANDR configuration was last changed
+ * @config_timestamp_ret: Location in which to store the timestamp at which the RANDR configuration was last obtained
+ *
+ * Queries the two timestamps that the X RANDR extension maintains.  The X
+ * server will prevent change requests for stale configurations, those whose
+ * timestamp is not equal to that of the latest request for configuration.  The
+ * X server will also prevent change requests that have an older timestamp to
+ * the latest change request.
+ */
+void
+mate_rr_screen_get_timestamps (MateRRScreen *screen,
+				guint32       *change_timestamp_ret,
+				guint32       *config_timestamp_ret)
+{
+    g_return_if_fail (screen != NULL);
+
+#ifdef HAVE_RANDR
+    if (change_timestamp_ret)
+	*change_timestamp_ret = screen->info->resources->timestamp;
+
+    if (config_timestamp_ret)
+	*config_timestamp_ret = screen->info->resources->configTimestamp;
+#endif
+}
+
+static gboolean
+force_timestamp_update (MateRRScreen *screen)
+{
+    MateRRCrtc *crtc;
+    XRRCrtcInfo *current_info;
+    Status status;
+    gboolean timestamp_updated;
+
+    timestamp_updated = FALSE;
+
+    crtc = screen->info->crtcs[0];
+
+    if (crtc == NULL)
+	goto out;
+
+    current_info = XRRGetCrtcInfo (screen->xdisplay,
+				   screen->info->resources,
+				   crtc->id);
+
+    if (current_info == NULL)
+	goto out;
+
+    gdk_error_trap_push ();
+    status = XRRSetCrtcConfig (screen->xdisplay,
+			       screen->info->resources,
+			       crtc->id,
+			       current_info->timestamp,
+			       current_info->x,
+			       current_info->y,
+			       current_info->mode,
+			       current_info->rotation,
+			       current_info->outputs,
+			       current_info->noutput);
+
+    XRRFreeCrtcInfo (current_info);
+
+    gdk_flush ();
+    if (gdk_error_trap_pop ())
+	goto out;
+
+    if (status == RRSetConfigSuccess)
+	timestamp_updated = TRUE;
+out:
+    return timestamp_updated;
+}
+
+/**
+ * mate_rr_screen_refresh
+ * @screen: a #MateRRScreen
+ * @error: location to store error, or %NULL
+ *
+ * Refreshes the screen configuration, and calls the screen's callback if it
+ * exists and if the screen's configuration changed.
+ *
+ * Return value: TRUE if the screen's configuration changed; otherwise, the
+ * function returns FALSE and a NULL error if the configuration didn't change,
+ * or FALSE and a non-NULL error if there was an error while refreshing the
+ * configuration.
+ */
+gboolean
+mate_rr_screen_refresh (MateRRScreen *screen,
+			 GError       **error)
+{
+    gboolean refreshed;
+
+    g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+    gdk_x11_display_grab (gdk_screen_get_display (screen->gdk_screen));
+
+    refreshed = screen_update (screen, FALSE, TRUE, error);
+    force_timestamp_update (screen); /* this is to keep other clients from thinking that the X server re-detected things by itself - bgo#621046 */
+
+    gdk_x11_display_ungrab (gdk_screen_get_display (screen->gdk_screen));
+
+    return refreshed;
+}
+
+MateRRMode **
+mate_rr_screen_list_modes (MateRRScreen *screen)
+{
+    g_return_val_if_fail (screen != NULL, NULL);
+    g_return_val_if_fail (screen->info != NULL, NULL);
+    
+    return screen->info->modes;
+}
+
+MateRRMode **
+mate_rr_screen_list_clone_modes   (MateRRScreen *screen)
+{
+    g_return_val_if_fail (screen != NULL, NULL);
+    g_return_val_if_fail (screen->info != NULL, NULL);
+
+    return screen->info->clone_modes;
+}
+
+MateRRCrtc **
+mate_rr_screen_list_crtcs (MateRRScreen *screen)
+{
+    g_return_val_if_fail (screen != NULL, NULL);
+    g_return_val_if_fail (screen->info != NULL, NULL);
+    
+    return screen->info->crtcs;
+}
+
+MateRROutput **
+mate_rr_screen_list_outputs (MateRRScreen *screen)
+{
+    g_return_val_if_fail (screen != NULL, NULL);
+    g_return_val_if_fail (screen->info != NULL, NULL);
+    
+    return screen->info->outputs;
+}
+
+MateRRCrtc *
+mate_rr_screen_get_crtc_by_id (MateRRScreen *screen,
+				guint32        id)
+{
+    int i;
+    
+    g_return_val_if_fail (screen != NULL, NULL);
+    g_return_val_if_fail (screen->info != NULL, NULL);
+    
+    for (i = 0; screen->info->crtcs[i] != NULL; ++i)
+    {
+	if (screen->info->crtcs[i]->id == id)
+	    return screen->info->crtcs[i];
+    }
+    
+    return NULL;
+}
+
+MateRROutput *
+mate_rr_screen_get_output_by_id (MateRRScreen *screen,
+				  guint32        id)
+{
+    int i;
+    
+    g_return_val_if_fail (screen != NULL, NULL);
+    g_return_val_if_fail (screen->info != NULL, NULL);
+    
+    for (i = 0; screen->info->outputs[i] != NULL; ++i)
+    {
+	if (screen->info->outputs[i]->id == id)
+	    return screen->info->outputs[i];
+    }
+    
+    return NULL;
+}
+
+/* MateRROutput */
+static MateRROutput *
+output_new (ScreenInfo *info, RROutput id)
+{
+    MateRROutput *output = g_new0 (MateRROutput, 1);
+    
+    output->id = id;
+    output->info = info;
+    
+    return output;
+}
+
+static guint8 *
+get_property (Display *dpy,
+	      RROutput output,
+	      Atom atom,
+	      int *len)
+{
+#ifdef HAVE_RANDR
+    unsigned char *prop;
+    int actual_format;
+    unsigned long nitems, bytes_after;
+    Atom actual_type;
+    guint8 *result;
+    
+    XRRGetOutputProperty (dpy, output, atom,
+			  0, 100, False, False,
+			  AnyPropertyType,
+			  &actual_type, &actual_format,
+			  &nitems, &bytes_after, &prop);
+    
+    if (actual_type == XA_INTEGER && actual_format == 8)
+    {
+	result = g_memdup (prop, nitems);
+	if (len)
+	    *len = nitems;
+    }
+    else
+    {
+	result = NULL;
+    }
+    
+    XFree (prop);
+    
+    return result;
+#else
+    return NULL;
+#endif /* HAVE_RANDR */
+}
+
+static guint8 *
+read_edid_data (MateRROutput *output)
+{
+    Atom edid_atom;
+    guint8 *result;
+    int len;
+
+    edid_atom = XInternAtom (DISPLAY (output), "EDID", FALSE);
+    result = get_property (DISPLAY (output),
+			   output->id, edid_atom, &len);
+
+    if (!result)
+    {
+	edid_atom = XInternAtom (DISPLAY (output), "EDID_DATA", FALSE);
+	result = get_property (DISPLAY (output),
+			       output->id, edid_atom, &len);
+    }
+
+    if (result)
+    {
+	if (len % 128 == 0)
+	    return result;
+	else
+	    g_free (result);
+    }
+    
+    return NULL;
+}
+
+static char *
+get_connector_type_string (MateRROutput *output)
+{
+#ifdef HAVE_RANDR
+    char *result;
+    unsigned char *prop;
+    int actual_format;
+    unsigned long nitems, bytes_after;
+    Atom actual_type;
+    Atom connector_type;
+    char *connector_type_str;
+
+    result = NULL;
+
+    if (XRRGetOutputProperty (DISPLAY (output), output->id, output->info->screen->connector_type_atom,
+			      0, 100, False, False,
+			      AnyPropertyType,
+			      &actual_type, &actual_format,
+			      &nitems, &bytes_after, &prop) != Success)
+	return NULL;
+
+    if (!(actual_type == XA_ATOM && actual_format == 32 && nitems == 1))
+	goto out;
+
+    connector_type = *((Atom *) prop);
+
+    connector_type_str = XGetAtomName (DISPLAY (output), connector_type);
+    if (connector_type_str) {
+	result = g_strdup (connector_type_str); /* so the caller can g_free() it */
+	XFree (connector_type_str);
+    }
+
+out:
+
+    XFree (prop);
+
+    return result;
+#else
+    return NULL;
+#endif
+}
+
+#ifdef HAVE_RANDR
+static gboolean
+output_initialize (MateRROutput *output, XRRScreenResources *res, GError **error)
+{
+    XRROutputInfo *info = XRRGetOutputInfo (
+	DISPLAY (output), res, output->id);
+    GPtrArray *a;
+    int i;
+    
+#if 0
+    g_print ("Output %lx Timestamp: %u\n", output->id, (guint32)info->timestamp);
+#endif
+    
+    if (!info || !output->info)
+    {
+	/* FIXME: see the comment in crtc_initialize() */
+	/* Translators: here, an "output" is a video output */
+	g_set_error (error, MATE_RR_ERROR, MATE_RR_ERROR_RANDR_ERROR,
+		     _("could not get information about output %d"),
+		     (int) output->id);
+	return FALSE;
+    }
+    
+    output->name = g_strdup (info->name); /* FIXME: what is nameLen used for? */
+    output->current_crtc = crtc_by_id (output->info, info->crtc);
+    output->width_mm = info->mm_width;
+    output->height_mm = info->mm_height;
+    output->connected = (info->connection == RR_Connected);
+    output->connector_type = get_connector_type_string (output);
+
+    /* Possible crtcs */
+    a = g_ptr_array_new ();
+    
+    for (i = 0; i < info->ncrtc; ++i)
+    {
+	MateRRCrtc *crtc = crtc_by_id (output->info, info->crtcs[i]);
+	
+	if (crtc)
+	    g_ptr_array_add (a, crtc);
+    }
+    g_ptr_array_add (a, NULL);
+    output->possible_crtcs = (MateRRCrtc **)g_ptr_array_free (a, FALSE);
+    
+    /* Clones */
+    a = g_ptr_array_new ();
+    for (i = 0; i < info->nclone; ++i)
+    {
+	MateRROutput *mate_rr_output = mate_rr_output_by_id (output->info, info->clones[i]);
+	
+	if (mate_rr_output)
+	    g_ptr_array_add (a, mate_rr_output);
+    }
+    g_ptr_array_add (a, NULL);
+    output->clones = (MateRROutput **)g_ptr_array_free (a, FALSE);
+    
+    /* Modes */
+    a = g_ptr_array_new ();
+    for (i = 0; i < info->nmode; ++i)
+    {
+	MateRRMode *mode = mode_by_id (output->info, info->modes[i]);
+	
+	if (mode)
+	    g_ptr_array_add (a, mode);
+    }
+    g_ptr_array_add (a, NULL);
+    output->modes = (MateRRMode **)g_ptr_array_free (a, FALSE);
+    
+    output->n_preferred = info->npreferred;
+    
+    /* Edid data */
+    output->edid_data = read_edid_data (output);
+    
+    XRRFreeOutputInfo (info);
+
+    return TRUE;
+}
+#endif /* HAVE_RANDR */
+
+static void
+output_free (MateRROutput *output)
+{
+    g_free (output->clones);
+    g_free (output->modes);
+    g_free (output->possible_crtcs);
+    g_free (output->edid_data);
+    g_free (output->name);
+    g_free (output->connector_type);
+    g_free (output);
+}
+
+guint32
+mate_rr_output_get_id (MateRROutput *output)
+{
+    g_assert(output != NULL);
+    
+    return output->id;
+}
+
+const guint8 *
+mate_rr_output_get_edid_data (MateRROutput *output)
+{
+    g_return_val_if_fail (output != NULL, NULL);
+    
+    return output->edid_data;
+}
+
+MateRROutput *
+mate_rr_screen_get_output_by_name (MateRRScreen *screen,
+				    const char    *name)
+{
+    int i;
+    
+    g_return_val_if_fail (screen != NULL, NULL);
+    g_return_val_if_fail (screen->info != NULL, NULL);
+    
+    for (i = 0; screen->info->outputs[i] != NULL; ++i)
+    {
+	MateRROutput *output = screen->info->outputs[i];
+	
+	if (strcmp (output->name, name) == 0)
+	    return output;
+    }
+    
+    return NULL;
+}
+
+MateRRCrtc *
+mate_rr_output_get_crtc (MateRROutput *output)
+{
+    g_return_val_if_fail (output != NULL, NULL);
+    
+    return output->current_crtc;
+}
+
+/* Returns NULL if the ConnectorType property is not available */
+const char *
+mate_rr_output_get_connector_type (MateRROutput *output)
+{
+    g_return_val_if_fail (output != NULL, NULL);
+
+    return output->connector_type;
+}
+
+gboolean
+mate_rr_output_is_laptop (MateRROutput *output)
+{
+    const char *connector_type;
+
+    g_return_val_if_fail (output != NULL, FALSE);
+
+    if (!output->connected)
+	return FALSE;
+
+    /* The ConnectorType property is present in RANDR 1.3 and greater */
+
+    connector_type = mate_rr_output_get_connector_type (output);
+    if (connector_type && strcmp (connector_type, MATE_RR_CONNECTOR_TYPE_PANEL) == 0)
+	return TRUE;
+
+    /* Older versions of RANDR - this is a best guess, as @#$% RANDR doesn't have standard output names,
+     * so drivers can use whatever they like.
+     */
+
+    if (output->name
+	&& (strstr (output->name, "lvds") ||  /* Most drivers use an "LVDS" prefix... */
+	    strstr (output->name, "LVDS") ||
+	    strstr (output->name, "Lvds") ||
+	    strstr (output->name, "LCD")))    /* ... but fglrx uses "LCD" in some versions.  Shoot me now, kthxbye. */
+	return TRUE;
+
+    return FALSE;
+}
+
+MateRRMode *
+mate_rr_output_get_current_mode (MateRROutput *output)
+{
+    MateRRCrtc *crtc;
+    
+    g_return_val_if_fail (output != NULL, NULL);
+    
+    if ((crtc = mate_rr_output_get_crtc (output)))
+	return mate_rr_crtc_get_current_mode (crtc);
+    
+    return NULL;
+}
+
+void
+mate_rr_output_get_position (MateRROutput   *output,
+			      int             *x,
+			      int             *y)
+{
+    MateRRCrtc *crtc;
+    
+    g_return_if_fail (output != NULL);
+    
+    if ((crtc = mate_rr_output_get_crtc (output)))
+	mate_rr_crtc_get_position (crtc, x, y);
+}
+
+const char *
+mate_rr_output_get_name (MateRROutput *output)
+{
+    g_assert (output != NULL);
+    return output->name;
+}
+
+int
+mate_rr_output_get_width_mm (MateRROutput *output)
+{
+    g_assert (output != NULL);
+    return output->width_mm;
+}
+
+int
+mate_rr_output_get_height_mm (MateRROutput *output)
+{
+    g_assert (output != NULL);
+    return output->height_mm;
+}
+
+MateRRMode *
+mate_rr_output_get_preferred_mode (MateRROutput *output)
+{
+    g_return_val_if_fail (output != NULL, NULL);
+    if (output->n_preferred)
+	return output->modes[0];
+    
+    return NULL;
+}
+
+MateRRMode **
+mate_rr_output_list_modes (MateRROutput *output)
+{
+    g_return_val_if_fail (output != NULL, NULL);
+    return output->modes;
+}
+
+gboolean
+mate_rr_output_is_connected (MateRROutput *output)
+{
+    g_return_val_if_fail (output != NULL, FALSE);
+    return output->connected;
+}
+
+gboolean
+mate_rr_output_supports_mode (MateRROutput *output,
+			       MateRRMode   *mode)
+{
+    int i;
+    
+    g_return_val_if_fail (output != NULL, FALSE);
+    g_return_val_if_fail (mode != NULL, FALSE);
+    
+    for (i = 0; output->modes[i] != NULL; ++i)
+    {
+	if (output->modes[i] == mode)
+	    return TRUE;
+    }
+    
+    return FALSE;
+}
+
+gboolean
+mate_rr_output_can_clone (MateRROutput *output,
+			   MateRROutput *clone)
+{
+    int i;
+    
+    g_return_val_if_fail (output != NULL, FALSE);
+    g_return_val_if_fail (clone != NULL, FALSE);
+    
+    for (i = 0; output->clones[i] != NULL; ++i)
+    {
+	if (output->clones[i] == clone)
+	    return TRUE;
+    }
+    
+    return FALSE;
+}
+
+gboolean
+mate_rr_output_get_is_primary (MateRROutput *output)
+{
+#ifdef HAVE_RANDR
+    return output->info->primary == output->id;
+#else
+    return FALSE;
+#endif
+}
+
+void
+mate_rr_screen_set_primary_output (MateRRScreen *screen,
+                                    MateRROutput *output)
+{
+#ifdef HAVE_RANDR
+#if (RANDR_MAJOR > 1 || (RANDR_MAJOR == 1 && RANDR_MINOR >= 3))
+    RROutput id;
+
+    if (output)
+        id = output->id;
+    else
+        id = None;
+
+        /* Runtime check for RandR 1.3 or higher */
+    if (screen->rr_major_version == 1 && screen->rr_minor_version >= 3)
+        XRRSetOutputPrimary (screen->xdisplay, screen->xroot, id);
+#endif
+#endif /* HAVE_RANDR */
+}
+
+/* MateRRCrtc */
+typedef struct
+{
+    Rotation xrot;
+    MateRRRotation rot;
+} RotationMap;
+
+static const RotationMap rotation_map[] =
+{
+    { RR_Rotate_0, MATE_RR_ROTATION_0 },
+    { RR_Rotate_90, MATE_RR_ROTATION_90 },
+    { RR_Rotate_180, MATE_RR_ROTATION_180 },
+    { RR_Rotate_270, MATE_RR_ROTATION_270 },
+    { RR_Reflect_X, MATE_RR_REFLECT_X },
+    { RR_Reflect_Y, MATE_RR_REFLECT_Y },
+};
+
+static MateRRRotation
+mate_rr_rotation_from_xrotation (Rotation r)
+{
+    int i;
+    MateRRRotation result = 0;
+    
+    for (i = 0; i < G_N_ELEMENTS (rotation_map); ++i)
+    {
+	if (r & rotation_map[i].xrot)
+	    result |= rotation_map[i].rot;
+    }
+    
+    return result;
+}
+
+static Rotation
+xrotation_from_rotation (MateRRRotation r)
+{
+    int i;
+    Rotation result = 0;
+    
+    for (i = 0; i < G_N_ELEMENTS (rotation_map); ++i)
+    {
+	if (r & rotation_map[i].rot)
+	    result |= rotation_map[i].xrot;
+    }
+    
+    return result;
+}
+
+#ifndef MATE_DISABLE_DEPRECATED_SOURCE
+gboolean
+mate_rr_crtc_set_config (MateRRCrtc      *crtc,
+			  int               x,
+			  int               y,
+			  MateRRMode      *mode,
+			  MateRRRotation   rotation,
+			  MateRROutput   **outputs,
+			  int               n_outputs,
+			  GError          **error)
+{
+    return mate_rr_crtc_set_config_with_time (crtc, GDK_CURRENT_TIME, x, y, mode, rotation, outputs, n_outputs, error);
+}
+#endif
+
+gboolean
+mate_rr_crtc_set_config_with_time (MateRRCrtc      *crtc,
+				    guint32           timestamp,
+				    int               x,
+				    int               y,
+				    MateRRMode      *mode,
+				    MateRRRotation   rotation,
+				    MateRROutput   **outputs,
+				    int               n_outputs,
+				    GError          **error)
+{
+#ifdef HAVE_RANDR
+    ScreenInfo *info;
+    GArray *output_ids;
+    Status status;
+    gboolean result;
+    int i;
+    
+    g_return_val_if_fail (crtc != NULL, FALSE);
+    g_return_val_if_fail (mode != NULL || outputs == NULL || n_outputs == 0, FALSE);
+    g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+    
+    info = crtc->info;
+    
+    if (mode)
+    {
+	if (x + mode->width > info->max_width
+	    || y + mode->height > info->max_height)
+	{
+	    g_set_error (error, MATE_RR_ERROR, MATE_RR_ERROR_BOUNDS_ERROR,
+			 /* Translators: the "position", "size", and "maximum"
+			  * words here are not keywords; please translate them
+			  * as usual.  A CRTC is a CRT Controller (this is X terminology) */
+			 _("requested position/size for CRTC %d is outside the allowed limit: "
+			   "position=(%d, %d), size=(%d, %d), maximum=(%d, %d)"),
+			 (int) crtc->id,
+			 x, y,
+			 mode->width, mode->height,
+			 info->max_width, info->max_height);
+	    return FALSE;
+	}
+    }
+    
+    output_ids = g_array_new (FALSE, FALSE, sizeof (RROutput));
+    
+    if (outputs)
+    {
+	for (i = 0; i < n_outputs; ++i)
+	    g_array_append_val (output_ids, outputs[i]->id);
+    }
+    
+    status = XRRSetCrtcConfig (DISPLAY (crtc), info->resources, crtc->id,
+			       timestamp, 
+			       x, y,
+			       mode ? mode->id : None,
+			       xrotation_from_rotation (rotation),
+			       (RROutput *)output_ids->data,
+			       output_ids->len);
+    
+    g_array_free (output_ids, TRUE);
+
+    if (status == RRSetConfigSuccess)
+	result = TRUE;
+    else {
+	result = FALSE;
+	/* Translators: CRTC is a CRT Controller (this is X terminology).
+	 * It is *very* unlikely that you'll ever get this error, so it is
+	 * only listed for completeness. */
+	g_set_error (error, MATE_RR_ERROR, MATE_RR_ERROR_RANDR_ERROR,
+		     _("could not set the configuration for CRTC %d"),
+		     (int) crtc->id);
+    }
+    
+    return result;
+#else
+    return FALSE;
+#endif /* HAVE_RANDR */
+}
+
+MateRRMode *
+mate_rr_crtc_get_current_mode (MateRRCrtc *crtc)
+{
+    g_return_val_if_fail (crtc != NULL, NULL);
+    
+    return crtc->current_mode;
+}
+
+guint32
+mate_rr_crtc_get_id (MateRRCrtc *crtc)
+{
+    g_return_val_if_fail (crtc != NULL, 0);
+    
+    return crtc->id;
+}
+
+gboolean
+mate_rr_crtc_can_drive_output (MateRRCrtc   *crtc,
+				MateRROutput *output)
+{
+    int i;
+    
+    g_return_val_if_fail (crtc != NULL, FALSE);
+    g_return_val_if_fail (output != NULL, FALSE);
+    
+    for (i = 0; crtc->possible_outputs[i] != NULL; ++i)
+    {
+	if (crtc->possible_outputs[i] == output)
+	    return TRUE;
+    }
+    
+    return FALSE;
+}
+
+/* FIXME: merge with get_mode()? */
+void
+mate_rr_crtc_get_position (MateRRCrtc *crtc,
+			    int         *x,
+			    int         *y)
+{
+    g_return_if_fail (crtc != NULL);
+    
+    if (x)
+	*x = crtc->x;
+    
+    if (y)
+	*y = crtc->y;
+}
+
+/* FIXME: merge with get_mode()? */
+MateRRRotation
+mate_rr_crtc_get_current_rotation (MateRRCrtc *crtc)
+{
+    g_assert(crtc != NULL);
+    return crtc->current_rotation;
+}
+
+MateRRRotation
+mate_rr_crtc_get_rotations (MateRRCrtc *crtc)
+{
+    g_assert(crtc != NULL);
+    return crtc->rotations;
+}
+
+gboolean
+mate_rr_crtc_supports_rotation (MateRRCrtc *   crtc,
+				 MateRRRotation rotation)
+{
+    g_return_val_if_fail (crtc != NULL, FALSE);
+    return (crtc->rotations & rotation);
+}
+
+static MateRRCrtc *
+crtc_new (ScreenInfo *info, RROutput id)
+{
+    MateRRCrtc *crtc = g_new0 (MateRRCrtc, 1);
+    
+    crtc->id = id;
+    crtc->info = info;
+    
+    return crtc;
+}
+
+#ifdef HAVE_RANDR
+static gboolean
+crtc_initialize (MateRRCrtc        *crtc,
+		 XRRScreenResources *res,
+		 GError            **error)
+{
+    XRRCrtcInfo *info = XRRGetCrtcInfo (DISPLAY (crtc), res, crtc->id);
+    GPtrArray *a;
+    int i;
+    
+#if 0
+    g_print ("CRTC %lx Timestamp: %u\n", crtc->id, (guint32)info->timestamp);
+#endif
+    
+    if (!info)
+    {
+	/* FIXME: We need to reaquire the screen resources */
+	/* FIXME: can we actually catch BadRRCrtc, and does it make sense to emit that? */
+
+	/* Translators: CRTC is a CRT Controller (this is X terminology).
+	 * It is *very* unlikely that you'll ever get this error, so it is
+	 * only listed for completeness. */
+	g_set_error (error, MATE_RR_ERROR, MATE_RR_ERROR_RANDR_ERROR,
+		     _("could not get information about CRTC %d"),
+		     (int) crtc->id);
+	return FALSE;
+    }
+    
+    /* MateRRMode */
+    crtc->current_mode = mode_by_id (crtc->info, info->mode);
+    
+    crtc->x = info->x;
+    crtc->y = info->y;
+    
+    /* Current outputs */
+    a = g_ptr_array_new ();
+    for (i = 0; i < info->noutput; ++i)
+    {
+	MateRROutput *output = mate_rr_output_by_id (crtc->info, info->outputs[i]);
+	
+	if (output)
+	    g_ptr_array_add (a, output);
+    }
+    g_ptr_array_add (a, NULL);
+    crtc->current_outputs = (MateRROutput **)g_ptr_array_free (a, FALSE);
+    
+    /* Possible outputs */
+    a = g_ptr_array_new ();
+    for (i = 0; i < info->npossible; ++i)
+    {
+	MateRROutput *output = mate_rr_output_by_id (crtc->info, info->possible[i]);
+	
+	if (output)
+	    g_ptr_array_add (a, output);
+    }
+    g_ptr_array_add (a, NULL);
+    crtc->possible_outputs = (MateRROutput **)g_ptr_array_free (a, FALSE);
+    
+    /* Rotations */
+    crtc->current_rotation = mate_rr_rotation_from_xrotation (info->rotation);
+    crtc->rotations = mate_rr_rotation_from_xrotation (info->rotations);
+    
+    XRRFreeCrtcInfo (info);
+
+    /* get an store gamma size */
+    crtc->gamma_size = XRRGetCrtcGammaSize (DISPLAY (crtc), crtc->id);
+
+    return TRUE;
+}
+#endif
+
+static void
+crtc_free (MateRRCrtc *crtc)
+{
+    g_free (crtc->current_outputs);
+    g_free (crtc->possible_outputs);
+    g_free (crtc);
+}
+
+/* MateRRMode */
+static MateRRMode *
+mode_new (ScreenInfo *info, RRMode id)
+{
+    MateRRMode *mode = g_new0 (MateRRMode, 1);
+    
+    mode->id = id;
+    mode->info = info;
+    
+    return mode;
+}
+
+guint32
+mate_rr_mode_get_id (MateRRMode *mode)
+{
+    g_return_val_if_fail (mode != NULL, 0);
+    return mode->id;
+}
+
+guint
+mate_rr_mode_get_width (MateRRMode *mode)
+{
+    g_return_val_if_fail (mode != NULL, 0);
+    return mode->width;
+}
+
+int
+mate_rr_mode_get_freq (MateRRMode *mode)
+{
+    g_return_val_if_fail (mode != NULL, 0);
+    return (mode->freq) / 1000;
+}
+
+guint
+mate_rr_mode_get_height (MateRRMode *mode)
+{
+    g_return_val_if_fail (mode != NULL, 0);
+    return mode->height;
+}
+
+#ifdef HAVE_RANDR
+static void
+mode_initialize (MateRRMode *mode, XRRModeInfo *info)
+{
+    g_assert (mode != NULL);
+    g_assert (info != NULL);
+    
+    mode->name = g_strdup (info->name);
+    mode->width = info->width;
+    mode->height = info->height;
+    mode->freq = ((info->dotClock / (double)info->hTotal) / info->vTotal + 0.5) * 1000;
+}
+#endif /* HAVE_RANDR */
+
+static void
+mode_free (MateRRMode *mode)
+{
+    g_free (mode->name);
+    g_free (mode);
+}
+
+void
+mate_rr_crtc_set_gamma (MateRRCrtc *crtc, int size,
+			 unsigned short *red,
+			 unsigned short *green,
+			 unsigned short *blue)
+{
+#ifdef HAVE_RANDR
+    int copy_size;
+    XRRCrtcGamma *gamma;
+
+    g_return_if_fail (crtc != NULL);
+    g_return_if_fail (red != NULL);
+    g_return_if_fail (green != NULL);
+    g_return_if_fail (blue != NULL);
+
+    if (size != crtc->gamma_size)
+	return;
+
+    gamma = XRRAllocGamma (crtc->gamma_size);
+
+    copy_size = crtc->gamma_size * sizeof (unsigned short);
+    memcpy (gamma->red, red, copy_size);
+    memcpy (gamma->green, green, copy_size);
+    memcpy (gamma->blue, blue, copy_size);
+
+    XRRSetCrtcGamma (DISPLAY (crtc), crtc->id, gamma);
+    XRRFreeGamma (gamma);
+#endif /* HAVE_RANDR */
+}
+
+gboolean
+mate_rr_crtc_get_gamma (MateRRCrtc *crtc, int *size,
+			 unsigned short **red, unsigned short **green,
+			 unsigned short **blue)
+{
+#ifdef HAVE_RANDR
+    int copy_size;
+    unsigned short *r, *g, *b;
+    XRRCrtcGamma *gamma;
+
+    g_return_val_if_fail (crtc != NULL, FALSE);
+
+    gamma = XRRGetCrtcGamma (DISPLAY (crtc), crtc->id);
+    if (!gamma)
+	return FALSE;
+
+    copy_size = crtc->gamma_size * sizeof (unsigned short);
+
+    if (red) {
+	r = g_new0 (unsigned short, crtc->gamma_size);
+	memcpy (r, gamma->red, copy_size);
+	*red = r;
+    }
+
+    if (green) {
+	g = g_new0 (unsigned short, crtc->gamma_size);
+	memcpy (g, gamma->green, copy_size);
+	*green = g;
+    }
+
+    if (blue) {
+	b = g_new0 (unsigned short, crtc->gamma_size);
+	memcpy (b, gamma->blue, copy_size);
+	*blue = b;
+    }
+
+    XRRFreeGamma (gamma);
+
+    if (size)
+	*size = crtc->gamma_size;
+
+    return TRUE;
+#else
+    return FALSE;
+#endif /* HAVE_RANDR */
+}
+