Add example overlay.

media/overlays/example/example.cfg

@@ -0,0 +1,22 @@
+overlays = 1
+# overlay0_overlay omitted. We don't need to splat an overlay across the screen.
+overlay0_rect = "0.50,0.50,0.50,0.50" # Place entire overlay in bottom right part of screen.
+overlay0_full_screen = true
+
+# These set defaults across the entire overlay. They can be overridden per-desc with overlayN_descM_alpha_mod = foo, etc.
+overlay0_alpha_mod = 2.0 # If we press a button desc, it will have twice the alpha.
+overlay0_range_mod = 1.5 # If we press a button desc, the hitbox range will be 1.5x the size until it's released.
+overlay0_normalized = true # Descriptor coordinates use normalized coordinates [0, 1] instead of pixels.
+
+overlay0_descs = 5
+overlay0_desc0_overlay = left.png
+overlay0_desc1_overlay = right.png
+overlay0_desc2_overlay = up.png
+overlay0_desc3_overlay = down.png
+overlay0_desc0 = "left,0.25,0.50,rect,0.125,0.125"
+overlay0_desc1 = "right,0.75,0.50,rect,0.125,0.125"
+overlay0_desc2 = "up,0.50,0.25,rect,0.125,0.125"
+overlay0_desc3 = "down,0.50,0.75,rect,0.125,0.125"
+
+overlay0_desc4 = "nul,0.30,0.90,rect,0.28,0.08" # Paste an arbitrary image. Input associated with this is nul.
+overlay0_desc4_overlay = logo.png