fixup gen_sprites

gen_sprites.sh

@@ -6,7 +6,7 @@ if [[ $# < 1 ]]; then
 fi
 
 src_dir=$1
-out_dir=assets/sprite/
+out_dir=assets/sprites/
 dpi=192
 
 svg_to_png="inkscape -C"
@@ -24,8 +24,11 @@ function gen() {
     dst_png=$out_dir/$name.png
     dst_map=$out_dir/$name.map
 
-    $svg_to_png $src -o $dst_png -d $dpi || exit 1
-    $gen_sprite_map < $src > $dst_map || exit 1
+    [[ "$src" -nt "$dst_png" ]] &&
+        ($svg_to_png $src -o $dst_png -d $dpi || exit 1)
+
+    [[ "$src" -nt "$dst_map" ]] &&
+        ($gen_sprite_map < $src > $dst_map || exit 1)
 }
 
 gen blocks 192

src/bin/gen_sprite_map.ml

@@ -16,6 +16,12 @@ let sexp_of_clip c =
     List.map Sexplib.Conv.sexp_of_int
       [c.x; c.y; c.w; c.h; c.ox; c.oy])
 
+let sexp_of_sprite_map clips =
+  Sexp.List (
+    Atom "map" ::
+    (List.sort (fun a b -> compare b.name a.name) clips |>
+     List.rev_map sexp_of_clip))
+
 let svg v = ("http://www.w3.org/2000/svg", v)
 let ink v = ("http://www.inkscape.org/namespaces/inkscape", v)
 let sodi v = ("http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd", v)
@@ -98,17 +104,15 @@ let extract_clips xml =
     | `El_end -> el_end ()
   do () done;
 
-  List.sort
-    (fun a b -> String.compare a.name b.name)
-    s.clips
+  s.clips
 
 let gen_sprite_map ic oc =
-  Xmlm.make_input (`Channel ic) |>
-  extract_clips  |>
-  List.iter (fun clip ->
-              Format.kasprintf (output_string oc)
-                "%a\n" Sexp.pp (sexp_of_clip clip))
-
+  let sprite_map =
+    Xmlm.make_input (`Channel ic) |>
+    extract_clips
+  in
+  Format.kasprintf (output_string oc) "%a\n"
+    Sexp.pp_hum (sexp_of_sprite_map sprite_map)
 
 let () =
   gen_sprite_map stdin stdout