314 lines
10 KiB
Scheme
314 lines
10 KiB
Scheme
(module (imugi drawing) ()
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(import scheme
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(chicken base)
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(chicken module)
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raylib
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(imugi core)
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(imugi guards)
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(imugi math)
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(srfi 4)
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(srfi 99))
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;; Color exports
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(export make-color color-r color-g color-b color-a
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set-color-r! set-color-g! set-color-b! set-color-a!)
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;; Color type
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(define-record-type <color>
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(int:make-color r g b a)
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color?
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(r color-r int:set-color-r!)
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(g color-g int:set-color-g!)
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(b color-b int:set-color-b!)
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(a color-a int:set-color-a!))
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;; Get a raylib color vec from a color
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(define (use-color col)
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(assert (color? col))
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(u8vector (floor (* 255 (color-r col)))
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(floor (* 255 (color-g col)))
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(floor (* 255 (color-b col)))
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(floor (* 255 (color-a col)))))
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;; Type safe color constructor
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(define (make-color r g b a)
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(assert (and (number? r) (<= 0 r 1)))
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(assert (and (number? g) (<= 0 g 1)))
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(assert (and (number? b) (<= 0 b 1)))
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(assert (and (number? a) (<= 0 a 1)))
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(int:make-color r g b a))
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;; Type safe color setter
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(define (set-color-r! color r)
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(assert (color? color))
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(assert (and (number? r) (<= 0 r 1)))
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(int:set-color-r! color r))
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;; Type safe color setter
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(define (set-color-g! color g)
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(assert (color? color))
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(assert (and (number? g) (<= 0 g 1)))
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(int:set-color-g! color g))
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;; Type safe color setter
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(define (set-color-b! color b)
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(assert (color? color))
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(assert (and (number? b) (<= 0 b 1)))
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(int:set-color-b! color b))
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;; Type safe color setter
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(define (set-color-a! color a)
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(assert (color? color))
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(assert (and (number? a) (<= 0 a 1)))
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(int:set-color-a! color a))
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;; Visuals
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;; Primitive shape visual types
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;; Pixel
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(export pixel-2d? make-pixel-2d
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pixel-2d-position set-pixel-2d-position!)
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(define-record-type <pixel-2d>
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(int:make-pixel-2d position)
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pixel-2d?
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(position pixel-2d-position int:set-pixel-2d-position!))
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(define (make-pixel-2d position)
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(assert (vec2? position))
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(int:make-pixel-2d position))
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(define set-pixel-2d-position!
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(guarded-mutator pixel-2d? 'position vec2?))
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;; Line2D
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(export line-2d? make-line-2d line-2d-start-pos
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set-line-2d-start-pos! line-2d-end-pos set-line-2d-end-pos!
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line-2d-thickness set-line-2d-thickness!)
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(define-record-type <line-2d>
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(int:make-line-2d start-pos end-pos thickness)
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line-2d?
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(start-pos line-2d-start-pos int:set-line-2d-start-pos!)
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(end-pos line-2d-end-pos int:set-line-2d-end-pos!)
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(thickness line-2d-thickness int:set-line-2d-thickness!))
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(define (make-line-2d start-pos end-pos thickness)
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(assert (vec2? start-pos))
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(assert (vec2? end-pos))
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(assert ((conjoin integer? positive?) thickness))
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(int:make-line-2d start-pos end-pos thickness))
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(define set-line-2d-start-pos!
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(guarded-mutator line-2d? 'start-pos vec2?))
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(define set-line-2d-end-pos!
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(guarded-mutator line-2d? 'end-pos vec2?))
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(define set-line-2d-thickness!
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(guarded-mutator line-2d? 'start-pos (conjoin integer? positive?)))
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;; Circle2D
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(export circle-2d? make-circle-2d circle-2d-center
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set-circle-2d-center! circle-2d-radius set-circle-2d-radius!
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circle-2d-filled? set-circle-2d-filled!)
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(define-record-type <circle-2d>
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(int:make-circle-2d center radius filled)
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circle-2d?
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(center circle-2d-center int:set-circle-2d-center!)
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(radius circle-2d-radius int:set-circle-2d-radius!)
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(filled circle-2d-filled? int:set-circle-2d-filled!))
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(define (make-circle-2d center radius filled)
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(assert (vec2? center))
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(assert ((conjoin integer? positive?) radius))
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(assert (boolean? filled))
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(int:make-circle-2d center radius filled))
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(define set-circle-2d-center!
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(guarded-mutator circle-2d? 'center vec2?))
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(define set-circle-2d-radius!
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(guarded-mutator circle-2d? 'radius (conjoin integer? positive?)))
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(define set-circle-2d-filled!
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(guarded-mutator circle-2d? 'filled boolean?))
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;; Rectangle2D
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;; TODO: might be nicer to have the origin and width/height inside a rect-2d type or similar
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(export rectangle-2d? make-rectangle-2d rectangle-2d-origin
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set-rectangle-2d-origin! rectangle-2d-width set-rectangle-2d-width!
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rectangle-2d-height set-rectangle-2d-height! rectangle-2d-filled?
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set-rectangle-2d-filled! rectangle-2d-thickness set-rectangle-2d-thickness!)
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(define-record-type <rectangle-2d>
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(int:make-rectangle-2d origin width height filled thickness)
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rectangle-2d?
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(origin rectangle-2d-origin int:set-rectangle-2d-origin!)
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(width rectangle-2d-width int:set-rectangle-2d-width!)
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(height rectangle-2d-height int:set-rectangle-2d-height!)
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(filled rectangle-2d-filled? int:set-rectangle-2d-filled!)
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(thickness rectangle-2d-thickness int:set-rectangle-2d-thickness))
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(define (make-rectangle-2d origin width height filled thickness)
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(assert (vec2? origin))
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(assert ((conjoin integer? positive?) width))
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(assert ((conjoin integer? positive?) height))
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(assert (boolean? filled))
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(assert ((conjoin integer? positive?) thickness))
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(int:make-rectangle-2d origin width height filled thickness))
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(define set-rectangle-2d-origin!
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(guarded-mutator rectangle-2d? 'origin vec2?))
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(define set-rectangle-2d-width!
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(guarded-mutator rectangle-2d? 'width (conjoin integer? positive?)))
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(define set-rectangle-2d-height!
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(guarded-mutator rectangle-2d? 'height (conjoin integer? positive?)))
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(define set-rectangle-2d-filled!
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(guarded-mutator rectangle-2d? 'filled boolean?))
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(define set-rectangle-2d-thickness!
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(guarded-mutator rectangle-2d? 'thickness (conjoin integer? positive?)))
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;; Triangle2D
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(export triangle-2d? make-triangle-2d triangle-2d-vertex-1
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set-triangle-2d-vertex-1! triangle-2d-vertex-2 set-triangle-2d-vertex-2!
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triangle-2d-vertex-3 set-triangle-2d-vertex-3! triangle-2d-filled? set-triangle-2d-filled!)
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(define-record-type <triangle-2d>
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(int:make-triangle-2d vertex-1 vertex-2 vertex-3 filled)
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triangle-2d?
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(vertex-1 triangle-2d-vertex-1 int:set-triangle-2d-vertex-1!)
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(vertex-2 triangle-2d-vertex-2 int:set-triangle-2d-vertex-2!)
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(vertex-3 triangle-2d-vertex-3 int:set-triangle-2d-vertex-3!)
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(filled triangle-2d-filled? int:set-triangle-2d-filled!))
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(define (make-triangle-2d vertex-1 vertex-2 vertex-3 filled)
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(assert (vec2? vertex-1))
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(assert (vec2? vertex-2))
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(assert (vec2? vertex-3))
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(assert (boolean? filled))
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(int:make-triangle-2d vertex-1 vertex-2 vertex-3 filled))
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(define set-triangle-2d-vertex-1!
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(guarded-mutator triangle-2d? 'vertex-1 vec2?))
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(define set-triangle-2d-vertex-2!
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(guarded-mutator triangle-2d? 'vertex-2 vec2?))
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(define set-triangle-2d-vertex-3!
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(guarded-mutator triangle-2d? 'vertex-3 vec2?))
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(define set-triangle-2d-filled!
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(guarded-mutator triangle-2d? 'filled boolean?))
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;; 2D text drawing
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(export text-2d? make-text-2d text-2d-position set-text-2d-position!
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text-2d-text set-text-2d-text! text-2d-size set-text-2d-size!)
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(define-record-type <text-2d>
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(int:make-text-2d position text size)
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text-2d?
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(position text-2d-position int:set-text-2d-position!)
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(text text-2d-text int:set-text-2d-text!)
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(size text-2d-size int:set-text-2d-size!))
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(define (make-text-2d position text size)
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(assert (vec2? position))
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(assert (string? text))
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(assert ((conjoin integer? positive?) size))
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(int:make-text-2d position text size))
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(define set-text-2d-position!
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(guarded-mutator text-2d? 'position vec2?))
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(define set-text-2d-text!
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(guarded-mutator text-2d? 'text string?))
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(define set-text-2d-size!
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(guarded-mutator text-2d? 'size (conjoin integer? positive?)))
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;; Visual component
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(export visual-2d? make-visual-2d visual-2d-draw set-visual-2d-draw!
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visual-2d-color set-visual-2d-color! visual-2d-layer set-visual-2d-layer!)
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(define-record-type <visual-2d>
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(int:make-visual-2d draw color layer)
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visual-2d?
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(draw visual-2d-draw int:set-visual-2d-draw!) ;; NOTE: Typing here: pixel-2d, line-2d, circle-2d, rectangle-2d, triangle-2d etc
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(color visual-2d-color int:set-visual-2d-color!)
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(layer visual-2d-layer int:set-visual-2d-layer!))
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(define (make-visual-2d draw color layer)
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(assert ((disjoin text-2d? triangle-2d? rectangle-2d? circle-2d? line-2d? pixel-2d?) draw))
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(assert (color? color))
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(assert (integer? layer))
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(int:make-visual-2d draw color layer))
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(define set-visual-2d-draw!
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(guarded-mutator visual-2d? 'draw (disjoin text-2d? triangle-2d? rectangle-2d? circle-2d? line-2d? pixel-2d?)))
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(define set-visual-2d-color!
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(guarded-mutator visual-2d? 'color color?))
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(define set-visual-2d-layer!
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(guarded-mutator visual-2d? 'layer integer?))
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;; Drawing functions
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;; Helper wrappers for raylib functions
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(export draw-circle-2d draw-rectangle-2d draw-text-2d draw-texture-2d draw-font-text-2d)
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(define (draw-circle-2d pos-vec radius color filled)
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(assert (vec2? pos-vec))
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(assert (number? radius))
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(assert (color? color))
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(assert (boolean? filled))
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((if filled
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draw-circle
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draw-circle-lines)
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(number->integer (v-x pos-vec))
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(number->integer (v-y pos-vec))
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(number->integer radius)
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(use-color color)))
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(define (draw-rectangle-2d pos-vec width height color filled thickness)
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(assert (vec2? pos-vec))
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(assert ((conjoin integer? positive?) width))
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(assert ((conjoin integer? positive?) height))
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(assert ((conjoin integer? positive?) thickness))
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(assert (boolean? filled))
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(assert (color? color))
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(if filled
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(draw-rectangle
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(number->integer (v-x pos-vec))
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(number->integer (v-y pos-vec))
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width
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height
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(use-color color))
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(draw-rectangle-lines
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(number->integer (v-x pos-vec))
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(number->integer (v-y pos-vec))
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width
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height
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(use-color color))))
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(define (draw-text-2d pos-vec text size tint)
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(assert (vec2? pos-vec))
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(assert (string? text))
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(assert ((conjoin integer? positive?) size))
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(assert (color? tint))
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(draw-text text
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(number->integer (v-x pos-vec))
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(number->integer (v-y pos-vec))
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size
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(use-color tint)))
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(define (draw-font-text-2d pos-vec text size tint font)
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(assert (vec2? pos-vec))
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(assert (string? text))
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(assert (resource? font))
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(assert (eqv? 'font (resource-type font)))
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(assert ((conjoin integer? positive?) size))
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(assert (color? tint))
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(when (resource-initialized? font)
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(draw-text-ex
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(resource-contents font)
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text
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(make-vec2 (number->integer (v-x pos-vec))
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(number->integer (v-y pos-vec)))
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size
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1
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(use-color tint))))
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(define (draw-texture-2d pos-vec texture color)
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(assert (vec2? pos-vec))
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(assert (resource? texture))
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(assert (eqv? 'texture (resource-type texture)))
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(assert (color? color))
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(when (resource-initialized? texture)
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(draw-texture (resource-contents texture)
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(number->integer (v-x pos-vec))
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(number->integer (v-y pos-vec))
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(use-color color))))
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)
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