gnome-rr: add API to check whether rotation is supported

Export a method on GnomeRROutputInfo to check which rotation options are
supported.

https://bugzilla.gnome.org/show_bug.cgi?id=721672

4 files changed, 10 insertions, 0 deletions

diff --git a/libgnome-desktop/gnome-rr-config.c b/libgnome-desktop/gnome-rr-config.c
index 7d0eb655..976fb926 100644
--- a/libgnome-desktop/gnome-rr-config.c
+++ b/libgnome-desktop/gnome-rr-config.c
@@ -193,6 +193,7 @@ gnome_rr_config_load_current (GnomeRRConfig *config, GError **error)
 		output->priv->height = gnome_rr_mode_get_height (mode);
 		output->priv->rate = gnome_rr_mode_get_freq (mode);
 		output->priv->rotation = gnome_rr_crtc_get_current_rotation (crtc);
+                output->priv->available_rotations = gnome_rr_crtc_get_rotations (crtc);
 
 		if (output->priv->x == 0 && output->priv->y == 0) {
 		    if (clone_width == -1) {
diff --git a/libgnome-desktop/gnome-rr-config.h b/libgnome-desktop/gnome-rr-config.h
index e7069e0e..e13825cc 100644
--- a/libgnome-desktop/gnome-rr-config.h
+++ b/libgnome-desktop/gnome-rr-config.h
@@ -73,6 +73,7 @@ void gnome_rr_output_info_set_refresh_rate (GnomeRROutputInfo *self, int rate);
 
 GnomeRRRotation gnome_rr_output_info_get_rotation (GnomeRROutputInfo *self);
 void            gnome_rr_output_info_set_rotation (GnomeRROutputInfo *self, GnomeRRRotation rotation);
+gboolean        gnome_rr_output_info_supports_rotation (GnomeRROutputInfo *self, GnomeRRRotation rotation);
 
 gboolean gnome_rr_output_info_is_connected     (GnomeRROutputInfo *self);
 const char *gnome_rr_output_info_get_vendor    (GnomeRROutputInfo *self);
diff --git a/libgnome-desktop/gnome-rr-output-info.c b/libgnome-desktop/gnome-rr-output-info.c
index 21776920..5422db3e 100644
--- a/libgnome-desktop/gnome-rr-output-info.c
+++ b/libgnome-desktop/gnome-rr-output-info.c
@@ -154,6 +154,13 @@ void gnome_rr_output_info_set_rotation (GnomeRROutputInfo *self, GnomeRRRotation
     self->priv->rotation = rotation;
 }
 
+gboolean gnome_rr_output_info_supports_rotation (GnomeRROutputInfo *self, GnomeRRRotation rotation)
+{
+    g_return_val_if_fail (GNOME_IS_RR_OUTPUT_INFO (self), FALSE);
+
+    return (self->priv->available_rotations & rotation);
+}
+
 /**
  * gnome_rr_output_info_is_connected:
  *
diff --git a/libgnome-desktop/gnome-rr-private.h b/libgnome-desktop/gnome-rr-private.h
index f7d1cd99..5ad2b28e 100644
--- a/libgnome-desktop/gnome-rr-private.h
+++ b/libgnome-desktop/gnome-rr-private.h
@@ -62,6 +62,7 @@ struct _GnomeRROutputInfoPrivate
     int			x;
     int			y;
     GnomeRRRotation	rotation;
+    GnomeRRRotation	available_rotations;
 
     gboolean		connected;
     char *		vendor;