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65 lines
2.3 KiB
Racket
65 lines
2.3 KiB
Racket
2 years ago
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#lang debug racket/base
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(require "pass.rkt" "drawing.rkt" "quad.rkt" racket/match racket/string)
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(provide (all-defined-out))
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(define-syntax-rule (define-render-pass (PASS-NAME ARG)
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EXPRS ...)
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(define-pass (PASS-NAME ARG)
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#:precondition (λ (xs) (and (list? xs) (andmap $drawing-inst? xs)))
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#:postcondition values
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EXPRS ...))
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(define-render-pass (render-to-text xs)
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(define move-posns (map $move-posn (filter $move? xs)))
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(define xmax (add1 (apply max (map $point-x move-posns))))
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(define ymax (add1 (apply max (map $point-y move-posns))))
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(define char-pos-table (make-hasheqv))
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;; scan over the instructions and record where the chars want to go
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(let loop ([current-loc 0+0i][xs xs])
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(unless (null? xs)
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(match xs
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[(cons ($move ($point x y)) rest)
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(loop (make-rectangular x y) rest)]
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[(cons ($text c) rest)
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(hash-set! char-pos-table current-loc c)
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(loop current-loc rest)]
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[(cons _ rest) (loop current-loc rest)])))
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;; fill in a character grid
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(displayln
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(string-join
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(for/list ([y (in-range ymax)])
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(list->string
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(for/list ([x (in-range xmax)])
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(hash-ref char-pos-table (make-rectangular x y) #\space)))) "\n")))
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(require racket/gui)
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(define-render-pass (render-to-bitmap xs)
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(define move-posns (map $move-posn (filter $move? xs)))
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(define xmax (add1 (apply max (map $point-x move-posns))))
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(define ymax (add1 (apply max (map $point-y move-posns))))
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(define em-scale 30)
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(define target (make-bitmap (* em-scale xmax) (* em-scale ymax)))
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(define dc (new bitmap-dc% [bitmap target]))
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(send dc scale em-scale em-scale)
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(define face-list (get-face-list 'mono))
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(when (null? face-list)
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(error 'no-mono-font-available))
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(define my-face (car face-list))
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(send dc set-font (make-font #:size 1 #:face my-face))
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(send dc set-text-foreground "black")
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(let loop ([current-loc 0+0i][xs xs])
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(unless (null? xs)
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(match xs
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[(cons ($move ($point x y)) rest)
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(loop (make-rectangular x y) rest)]
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[(cons ($text c) rest)
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(send dc draw-text (string c) (real-part current-loc) (imag-part current-loc))
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(loop current-loc rest)]
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[(cons _ rest) (loop current-loc rest)])))
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(make-object image-snip% target))
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