[gnome-settings-daemon/gnome-3-2] color: Reset the gamma tables when the screen configuration changes

[Richard Hughes <rhughes src gnome org>]

commit a837c01a6c0cbbb0a135b4d130ecec027b2dcb8a
Author: Richard Hughes <richard hughsie com>
Date:   Tue Sep 27 18:16:44 2011 +0100

    color: Reset the gamma tables when the screen configuration changes
    
    We have to reset the gamma tables each time, as if the primary output
    has changed then different crtcs are going to be used.
    
    This prevents the profile VCGT being used on the wrong monitor.
    
    Resolves https://bugzilla.gnome.org/show_bug.cgi?id=660164

 plugins/color/gsd-color-manager.c |   66 +++++++++++++++++++++++++++++++++++++
 1 files changed, 66 insertions(+), 0 deletions(-)
---
diff --git a/plugins/color/gsd-color-manager.c b/plugins/color/gsd-color-manager.c
index c2221e9..6fe086e 100644
--- a/plugins/color/gsd-color-manager.c
+++ b/plugins/color/gsd-color-manager.c
@@ -1398,6 +1398,69 @@ out:
 }
 
 static void
+gcm_session_profile_gamma_find_device_cb (GObject *object,
+                                          GAsyncResult *res,
+                                          gpointer user_data)
+{
+        CdClient *client = CD_CLIENT (object);
+        CdDevice *device = NULL;
+        GError *error = NULL;
+        GsdColorManager *manager = GSD_COLOR_MANAGER (user_data);
+
+        device = cd_client_find_device_by_property_finish (client,
+                                                           res,
+                                                           &error);
+        if (device == NULL) {
+                g_warning ("not found device %s: %s",
+                           cd_device_get_id (device),
+                           error->message);
+                g_error_free (error);
+                goto out;
+        }
+
+        /* get properties */
+        cd_device_connect (device,
+                           NULL,
+                           gcm_session_device_assign_connect_cb,
+                           manager);
+out:
+        if (device != NULL)
+                g_object_unref (device);
+}
+
+/* We have to reset the gamma tables each time as if the primary output
+ * has changed then different crtcs are going to be used.
+ * See https://bugzilla.gnome.org/show_bug.cgi?id=660164 for an example */
+static void
+gnome_rr_screen_output_changed_cb (GnomeRRScreen *screen,
+                                   GsdColorManager *manager)
+{
+        GnomeRROutput **outputs;
+        GsdColorManagerPrivate *priv = manager->priv;
+        guint i;
+
+        /* get X11 outputs */
+        outputs = gnome_rr_screen_list_outputs (priv->x11_screen);
+        if (outputs == NULL) {
+                g_warning ("failed to get outputs");
+                return;
+        }
+        for (i = 0; outputs[i] != NULL; i++) {
+                if (!gnome_rr_output_is_connected (outputs[i]))
+                        continue;
+
+                /* get CdDevice for this output */
+                cd_client_find_device_by_property (manager->priv->client,
+                                                   CD_DEVICE_METADATA_XRANDR_NAME,
+                                                   gnome_rr_output_get_name (outputs[i]),
+                                                   NULL,
+                                                   gcm_session_profile_gamma_find_device_cb,
+                                                   manager);
+        }
+
+}
+
+static void
 gcm_session_client_connect_cb (GObject *source_object,
                                GAsyncResult *res,
                                gpointer user_data)
@@ -1456,6 +1519,9 @@ gcm_session_client_connect_cb (GObject *source_object,
         g_signal_connect (priv->x11_screen, "output-disconnected",
                           G_CALLBACK (gnome_rr_screen_output_removed_cb),
                           manager);
+        g_signal_connect (priv->x11_screen, "changed",
+                          G_CALLBACK (gnome_rr_screen_output_changed_cb),
+                          manager);
 
         g_signal_connect (priv->client, "profile-added",
                           G_CALLBACK (gcm_session_profile_added_assign_cb),