87 lines
2.6 KiB
Fennel
87 lines
2.6 KiB
Fennel
(local util (require :lib.util))
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(local lume (require :lib.lume))
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(local flags [:walkable])
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(local flag-to-bit {})
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(each [iflag flag (ipairs flags)]
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(tset flag-to-bit flag (bit.lshift 1 (- iflag 1))))
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(local encoded-tile-fields [:gfx :mask])
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(fn convert [tile field method]
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(local oldval (. tile field))
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(when oldval
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(tset tile field (: oldval method)))
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tile)
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(fn convert-all [tile method]
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(each [_ field (ipairs encoded-tile-fields)]
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(convert tile field method))
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tile)
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(fn deserialize [tile]
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(match (type tile)
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:string {:gfx (tile:fromhex) :flags {}}
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:table (convert-all tile :fromhex)))
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(fn serialize [tile] (convert-all (lume.clone tile) :tohex))
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(local fn-tiles "game/tiles.json")
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(local fn-portraits "game/portraits.json")
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(local fn-font "game/font.json")
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(fn loadgfx [filename]
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(if (util.file-exists filename)
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(lume.map (util.readjson filename) deserialize)
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[]))
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(fn savegfx [filename gfx] (util.writejson filename (lume.map gfx serialize)))
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(fn appendgfx [org gfx ?key ?ignore-labels]
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(each [_ g (ipairs gfx)]
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(when (and g.label (not ?ignore-labels)) (org:append g.label))
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(org:append [:bytes (. g (or ?key :gfx))])))
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(fn appendtiles [org]
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(local tiles (loadgfx fn-tiles))
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(org:append [:align 0x100] :tileset)
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(appendgfx org tiles)
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(appendgfx org (loadgfx fn-portraits))
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(org:append :tileflags)
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(each [_ tile (ipairs tiles)]
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(var flags 0)
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(each [flag _ (pairs tile.flags)]
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(set flags (bit.bor flags (. flag-to-bit flag))))
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(org:append [:db flags])))
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(fn append-portraitwords [vm ?overrides]
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(local overrides (or ?overrides {}))
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(each [_ p (ipairs (loadgfx fn-portraits))]
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(let [wordname (.. :draw- p.label)
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override (. overrides p.label)]
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(vm:word (.. :draw- p.label) :show-footer
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(if override (override p.label) [:vm :lit p.label])
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:draw-portrait))))
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(fn encode-yx [xy]
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(if xy (bit.bor (bit.lshift (- xy.y 1) 8) (- xy.x 1)) 0xffff))
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(fn encode-itile [itile]
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(bit.bor
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(bit.lshift (bit.band (- itile 1) 0x07) 5)
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(bit.rshift (bit.band (- itile 1) 0xf8) 3)))
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(fn decode-itile [enctile]
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(+ 1 (bit.bor
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(bit.lshift (bit.band enctile 0x1f) 3)
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(bit.rshift (bit.band enctile 0xe0) 5))))
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(fn find-itile [tiles label ?itilenext]
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(local itile (or ?itilenext 1))
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(local tile (. tiles itile))
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(assert (not= tile nil) (.. "No such tile " label))
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(if (= tile.label label) (encode-itile itile)
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(find-itile tiles label (+ itile 1))))
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{: loadgfx : savegfx : appendtiles : appendgfx : append-portraitwords : flags : flag-to-bit : find-itile
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: fn-tiles : fn-portraits : fn-font : encode-yx : encode-itile : decode-itile}
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