[gnome-desktop] gnome-rr: Add test tool to debug GnomeRR issues

[Bastien Nocera <hadess src gnome org>]

commit c68e01f46d8a5297fedbb2331039bc7788169f3a
Author: Richard Hughes <richard hughsie com>
Date:   Fri Mar 16 12:11:46 2012 +0000

    gnome-rr: Add test tool to debug GnomeRR issues

 libgnome-desktop/Makefile.am      |   11 ++++
 libgnome-desktop/gnome-rr-debug.c |  121 +++++++++++++++++++++++++++++++++++++
 2 files changed, 132 insertions(+), 0 deletions(-)
---
diff --git a/libgnome-desktop/Makefile.am b/libgnome-desktop/Makefile.am
index c432707..800d36c 100644
--- a/libgnome-desktop/Makefile.am
+++ b/libgnome-desktop/Makefile.am
@@ -106,4 +106,15 @@ EXTRA_DIST = \
 MAINTAINERCLEANFILES = \
 	pnp.ids
 
+libexec_PROGRAMS =		\
+	gnome-rr-debug
+
+gnome_rr_debug_SOURCES =	\
+	gnome-rr-debug.c
+
+gnome_rr_debug_LDADD =		\
+	$(GNOME_DESKTOP_LIBS)	\
+	$(lib_LTLIBRARIES)	\
+	$(XLIB_LIBS)
+
 -include $(top_srcdir)/git.mk
diff --git a/libgnome-desktop/gnome-rr-debug.c b/libgnome-desktop/gnome-rr-debug.c
new file mode 100644
index 0000000..91d4714
--- /dev/null
+++ b/libgnome-desktop/gnome-rr-debug.c
@@ -0,0 +1,121 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Richard Hughes <richard hughsie com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#define GNOME_DESKTOP_USE_UNSTABLE_API
+
+#include <gdk/gdkx.h>
+#include <glib.h>
+#include <gtk/gtk.h>
+#include <libgnome-desktop/gnome-rr.h>
+#include <X11/extensions/Xrandr.h>
+#include <X11/Xatom.h>
+
+/**
+ * get_property:
+ **/
+static guint8 *
+get_property (Display *dpy,
+	      RROutput output,
+	      Atom atom,
+	      gsize *len)
+{
+	unsigned char *prop;
+	int actual_format;
+	unsigned long nitems, bytes_after;
+	Atom actual_type;
+	guint8 *result = NULL;
+
+	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;
+	}
+	XFree (prop);
+	return result;
+}
+
+/**
+ * main:
+ **/
+int
+main (int argc, char *argv[])
+{
+	Atom edid_atom;
+	Display *display;
+	GError *error = NULL;
+	GnomeRROutput **outputs;
+	GnomeRRScreen *screen;
+	gsize len = 0;
+	guint8 *result = NULL;
+	guint i;
+
+	g_type_init ();
+	gtk_init (&argc, &argv);
+	screen = gnome_rr_screen_new (gdk_screen_get_default (), &error);
+	if (screen == NULL) {
+		g_warning ("failed to get screen: %s", error->message);
+		g_error_free (error);
+		goto out;
+	}
+	display = GDK_SCREEN_XDISPLAY (gdk_screen_get_default ());
+	outputs = gnome_rr_screen_list_outputs (screen);
+	for (i = 0; outputs[i] != NULL; i++) {
+		g_print ("[%s]\n", gnome_rr_output_get_name (outputs[i]));
+		g_print ("\tconnected: %i\n", gnome_rr_output_is_connected (outputs[i]));
+		g_print ("\tlaptop: %i\n", gnome_rr_output_is_laptop (outputs[i]));
+		g_print ("\tprimary: %i\n", gnome_rr_output_get_is_primary (outputs[i]));
+		g_print ("\tid: %i\n", gnome_rr_output_get_id (outputs[i]));
+
+		/* get EDID (first try) */
+		edid_atom = XInternAtom (display, "EDID", FALSE);
+		result = get_property (display,
+				       gnome_rr_output_get_id (outputs[i]),
+				       edid_atom,
+				       &len);
+		if (result != NULL) {
+			g_print ("\tedid: %" G_GSIZE_FORMAT " bytes [%i:%i:%i:%i]\n",
+				 len, result[0], result[1],
+				 result[2], result[3]);
+			g_free (result);
+		}
+
+		/* get EDID (second try) */
+		edid_atom = XInternAtom (display, "EDID_DATA", FALSE);
+		result = get_property (display,
+				       gnome_rr_output_get_id (outputs[i]),
+				       edid_atom,
+				       &len);
+		if (result != NULL) {
+			g_print ("\tedid2: %" G_GSIZE_FORMAT " bytes [%i:%i:%i:%i]\n",
+				 len, result[0], result[1],
+				 result[2], result[3]);
+			g_free (result);
+		}
+	}
+out:
+	g_object_unref (screen);
+	return 0;
+}