Add eos_is_composite_tv_screen()

This function simply queries the resolution of a screen, or the default
screen if none is given. A resolution of 720x480 or 720x576 indicates a
composite TV, since we don't allow the user to select those resolutions
for themselves.

[endlessm/eos-sdk#3930]

1 files changed, 27 insertions, 0 deletions

diff --git a/endless/eosutil.c b/endless/eosutil.c
index 6ef12bf..7926cb5 100644
--- a/endless/eosutil.c
+++ b/endless/eosutil.c
@@ -66,3 +66,30 @@ eos_get_system_personality (void)
 
   return personality;
 }
+
+/**
+ * eos_is_composite_tv_screen:
+ * @screen: a #GdkScreen, or %NULL to use the default display's default screen.
+ *
+ * Determines whether @screen is a composite TV out.
+ *
+ * Returns: %TRUE if @screen is a composite TV, otherwise %FALSE.
+ *
+ * Since: 0.6
+ */
+gboolean
+eos_is_composite_tv_screen (GdkScreen *screen)
+{
+  if (screen == NULL)
+    screen = gdk_screen_get_default ();
+
+  if (gdk_screen_get_width (screen) != 720)
+    return FALSE;
+
+  int height = gdk_screen_get_height (screen);
+  if (height != 480 && height != 576)
+    return FALSE;
+
+  g_debug ("Composite screen detected for screen %p", screen);
+  return TRUE;
+}