[247/906] Import xray effect

Add xray effect. Maps luma to a negative, slightly cyan tinted, curve,
applies some light gaussian blur and multiplies it with its sobel edges. Not
sure about the name, likely to change. Probably still needs some tuning.

diff --git a/tests/examples/gtk/fxtest/fxtest.c b/tests/examples/gtk/fxtest/fxtest.c
index f3c2bfa..36dd2c1 100644 (file)
--- a/tests/examples/gtk/fxtest/fxtest.c
+++ b/tests/examples/gtk/fxtest/fxtest.c
@@ -190,6 +190,7 @@ main (gint argc, gchar * argv[])
   gtk_combo_box_append_text (GTK_COMBO_BOX (combo), "xpro");
   gtk_combo_box_append_text (GTK_COMBO_BOX (combo), "lumaxpro");
   gtk_combo_box_append_text (GTK_COMBO_BOX (combo), "sepia");
+  gtk_combo_box_append_text (GTK_COMBO_BOX (combo), "xray");
   gtk_combo_box_append_text (GTK_COMBO_BOX (combo), "sin");
   gtk_combo_box_append_text (GTK_COMBO_BOX (combo), "glow");