21 lines
916 B
Plaintext
21 lines
916 B
Plaintext
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(local {: putpixel : make-canvas} (require :editor.tiledraw))
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; converted from http://pixeljoint.com/forum/forum_posts.asp?TID=12795 (db16)
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; maybe check out https://lospec.com/palette-list ?
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(local pal [[1 0 1] [4 2 3] [3 3 6] [4 4 4] [8 4 3] [3 6 2] [13 4 4] [7 7 6]
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[5 7 12] [13 7 2] [8 9 10] [6 10 2] [13 10 9] [6 12 12] [13 13 5] [13 14 13]])
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(fn gs-to-rgb [color] (icollect [_ v (ipairs color)] (* v 0x11)))
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(fn tile-to-sprite [tile]
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(if tile (make-canvas 16 16 (fn [canvas]
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(for [y 0 15]
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(for [x 0 15 2]
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(let [ibyte (+ (* y 8) (math.floor (/ x 2)) 1)
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byte (string.byte (tile:sub ibyte ibyte))
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left (bit.band (bit.rshift byte 4) 0xf)
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right (bit.band byte 0xf)]
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(putpixel x y (gs-to-rgb (. pal (+ left 1))))
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(putpixel (+ x 1) y (gs-to-rgb (. pal (+ right 1)))))))))))
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{: tile-to-sprite : pal : gs-to-rgb}
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