79 lines
2.6 KiB
Scheme
79 lines
2.6 KiB
Scheme
(define-module (game util assets)
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#:use-module (ice-9 ftw)
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#:use-module (ice-9 textual-ports)
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#:use-module (chickadee graphics texture)
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#:use-module (chickadee graphics color)
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#:export (
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assets-load
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assets-load-image
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tile-texture
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tile-atlas
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hero-texture
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hero-atlas
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assets-map-levels
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read-level-map
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defeat-image
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victory-image
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)
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)
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(define tile-texture #f)
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(define tile-atlas #f)
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(define hero-texture #f)
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(define hero-atlas #f)
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(define defeat-image #f)
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(define victory-image #f)
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(define (assets-location)
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"find the location of the assets directory. The location is specified
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by the ASSET_DIR environment variable, or defaults to 'assets' in the
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current directory."
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(pk "Assets location: "
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(or (getenv "ASSET_DIR") "assets" )))
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(define (assets-file-name . names)
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"Return the full path of a file in the assets directory. The file is
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specified by a list of names, which are joined together. The
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ASSET_DIR environment variable can be used to specify a prefix to the
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asset directory."
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(string-append (assets-location) "/" (string-join names "/")))
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(define (read-level-map filename)
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"Read a level map from a file. The map is a list of strings, where each
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string is a row of the map. The map is read from the file in the
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'levels' directory."
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(call-with-input-file (assets-file-name "levels" filename) get-string-all))
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(define (level-map? filename )
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"Return true if the filename is a level map file. Level map files have
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the extension '.map'."
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(string-suffix? ".map" filename))
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(define (assets-map-levels f)
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"Apply a function to each level map file in the 'levels' directory. The
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function is passed the filename of the level map file."
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(map
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(compose f read-level-map)
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(scandir (assets-file-name "levels") level-map?)))
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(define (assets-load-image filename)
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"Load an image from a file in the assets directory. The filename is
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specified as a list of names, which are joined together. The image is
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returned as a texture."
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(load-image (assets-file-name "images" filename)))
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(define (assets-load)
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"Load all the assets for the game."
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(set! tile-texture (assets-load-image "simples_pimples.png"))
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(set! tile-atlas (split-texture tile-texture 16 16))
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(set! hero-texture (assets-load-image "lr_penguin2.png"))
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(set! hero-atlas (split-texture hero-texture 32 32))
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(set! defeat-image (assets-load-image "defeat.jpg"))
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(set! victory-image (assets-load-image "victory.jpg"))
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)
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