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+;;;; Copyright (C) 2018 Jakob L. Kreuze, All Rights Reserved.
+;;;;
+;;;; This file is part of swanky.
+;;;;
+;;;; swanky is free software: you can redistribute it and/or modify it under the
+;;;; terms of the GNU General Public License as published by the Free Software
+;;;; Foundation, either version 3 of the License, or (at your option) any later
+;;;; version.
+;;;;
+;;;; swanky is distributed in the hope that it will be useful, but WITHOUT ANY
+;;;; WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+;;;; FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+;;;; details.
+;;;;
+;;;; You should have received a copy of the GNU General Public License along
+;;;; with swanky. If not, see <http://www.gnu.org/licenses/>.
+
+(local tileset-values
+ {:empty [1 0 0 0]
+ :bricks [0 0 0 1]})
+
+;; Returns the keyword for a given tile pixel.
+(fn get-tile [image x y]
+ (var res :empty)
+ (let [(r g b a) (: image :getPixel x y)]
+ (each [name colors (pairs tileset-values)]
+ (when (and (= (. colors 1) r)
+ (= (. colors 2) g)
+ (= (. colors 3) b)
+ (= (. colors 4) a))
+ (set res name))))
+ res)
+
+;; Loads the tile layout of the level from the given ImageData, returning a
+;; rectangular two-dimensional array.
+(fn load-tiles [image]
+ (var tiles [])
+ (let [width (: image :getWidth)
+ height (: image :getHeight)]
+ (for [y 0 (- height 1)]
+ (var row [])
+ (for [x 0 (- width 1)]
+ (table.insert row (get-tile image x y)))
+ (table.insert tiles row))
+ (values tiles width height)))
+
+;; (for [y 0 (- height 1)]
+;; (for [x 0 (- width 1)]
+;; (let [tile (. tiles (+ 1 y) (+ 1 x))]
+;; (if (= tile :empty)
+;; (io.write " ")
+;; :else
+;; (io.write "b"))))
+;; (print))
+
+;; Returns the metadata and objects stored in the metadata file at the given
+;; path.
+(fn load-meta [path]
+ (fennel.dofile path))
+
+(fn load [name]
+ (let [tiles-path (.. "maps/" name ".png")
+ meta-path (.. "maps/" name ".fnl")]
+ (let [(tiles width height) (load-tiles (love.image.newImageData tiles-path))]
+ {:tiles tiles
+ :width width
+ :height height
+ :meta (load-meta meta-path)})))
+
+{:load load}