96 lines
3.7 KiB
Fennel
96 lines
3.7 KiB
Fennel
(local GraphicsEditView (require :editor.gfxedit))
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(local util (require :lib.util))
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(local lume (require :lib.lume))
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(local style (require :core.style))
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(local {: char-to-sprite : scanline-to-sprite : screen-y-to-offset} (util.require :editor.tiledraw))
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(local {: mouse-inside : activate : active? : checkbox : textfield : textbutton} (util.require :editor.imstate))
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(local ScreenEditView (GraphicsEditView:extend))
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(local screen-scale 4)
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(local screenw 280)
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(local screenh 192)
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(fn ScreenEditView.new [self filename]
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(ScreenEditView.super.new self)
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(set self.screenfilename filename)
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(set self.scanlines [])
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(self:reload))
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(fn gfxshift [byte offset]
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(local pixels (bit.band (string.byte byte) 0x7f))
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(local color (bit.band (string.byte byte) 0x80))
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(bit.bor color
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(if (> offset 0) (bit.band (bit.lshift pixels offset) 0x7f)
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(bit.rshift pixels (- offset)))))
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(fn brush-mask-at [brush xoffset y]
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(values (gfxshift (brush.gfx:sub y y) xoffset) (gfxshift (brush.mask:sub y y) xoffset)))
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(fn paint-byte [src brush mask]
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(if (not= (bit.band mask 0x7f) 0)
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(-> src
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(bit.band (bit.bxor 0xff mask))
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(bit.bor brush))
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src))
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(fn paint-byte-at [screen brush y xbyte xoffset yoffset]
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(if (and (>= xbyte 0) (< xbyte 40) (>= y 0) (< y screenh))
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(let [ibyte (+ (screen-y-to-offset y) xbyte)
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srcbyte (screen:sub (+ ibyte 1) (+ ibyte 1))
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painted (paint-byte (string.byte srcbyte) (brush-mask-at brush xoffset yoffset))]
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(util.splice screen ibyte (string.char painted)))
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screen))
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(fn paint [screen brush x y]
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(var result screen)
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(for [row y (+ y 7)]
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(local xbyte (math.floor (/ x 7)))
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(local xoffset-left (% x 7))
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(local xoffset-right (- xoffset-left 7))
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(local yoffset (+ (- row y) 1))
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(set result (paint-byte-at result brush row xbyte xoffset-left yoffset))
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(set result (paint-byte-at result brush row (+ xbyte 1) xoffset-right yoffset)))
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result)
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(fn ScreenEditView.draw-screen-editor [self x y]
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(local (w h) (values (* screenw screen-scale) (* screenh screen-scale)))
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(activate self :screen x y w h)
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(var screen self.screen)
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(when (and self.itile (mouse-inside x y w h))
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(local mx (math.floor (/ (- (love.mouse.getX) x) screen-scale)))
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(local my (math.floor (/ (- (love.mouse.getY) y) screen-scale)))
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(set screen (paint screen (. self.tilecache.tiles self.itile) (bit.band (- mx 3) 0xfffe) (- my 4)))
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(when (active? self :screen) (set self.screen screen)))
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(for [scany 0 (- screenh 1)]
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(local scanline (or (. self.scanlines scany) {}))
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(local ibyte (screen-y-to-offset scany))
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(local linehash (screen:sub (+ ibyte 1) (+ ibyte 40)))
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(when (not= scanline.linehash linehash)
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(set scanline.linehash linehash)
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(set scanline.sprite (scanline-to-sprite screen scany))
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(tset self.scanlines scany scanline))
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(love.graphics.draw scanline.sprite x (+ y (* scany screen-scale)) 0 screen-scale screen-scale)))
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(fn ScreenEditView.reload [self]
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(ScreenEditView.super.reload self)
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(local (loaded screen) (pcall #(util.readjson self.screenfilename)))
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(set self.screen
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(if (not loaded) (string.rep "\0" 0x2000)
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(screen:fromhex))))
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(fn ScreenEditView.save [self]
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(util.writejson self.screenfilename (self.screen:tohex)))
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(fn ScreenEditView.draw [self]
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(self:draw_background style.background)
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(love.graphics.setColor 1 1 1 1)
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(self:draw-screen-editor (+ self.position.x 10) (+ self.position.y 10))
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(self:draw-tile-selector (+ self.position.x 10) (+ self.position.y 20 (* screenh screen-scale)) (- self.size.x 20)))
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(fn ScreenEditView.resource-key [self] "brushes")
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(fn ScreenEditView.tilesize [self] (values 8 8))
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(fn ScreenEditView.get_name [self] (.. "Screen: " self.screenfilename))
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ScreenEditView
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