93 lines
No EOL
2.5 KiB
Text
93 lines
No EOL
2.5 KiB
Text
define bezierCubic2Q2 [require 'node-sfnt/lib/math/bezierCubic2Q2']
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define tp [require './transform'].transformPoint
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define Stroke [require './stroke'].Stroke
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define id (
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.xx 1
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.yx 0
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.xy 0
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.yy 1
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.x 0
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.y 0
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)
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define [Glyph name] : begin {
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set this.name name
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set this.unicode ()
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set this.contours ()
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set this.advanceWidth 500
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set this.gizmo (
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.xx 1
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.yx 0
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.xy 0
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.yy 1
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.x 0
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.y 0
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)
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return nothing
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}
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define [Glyph.prototype.set-width w] : begin {
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this.advanceWidth = w
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return this
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}
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define [Glyph.prototype.assign-unicode u] : begin {
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this.unicode.push : piecewise {
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[[typeof u] === 'string'] : u.charCodeAt 0
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true u
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}
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return this
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}
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define [Glyph.prototype.start-from x y] : begin {
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this.contours.push ([tp this.gizmo (.x x .y y .onCurve true)])
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return this
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}
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define [Glyph.prototype.line-to x y] : begin {
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this.contours`[this.contours.length - 1].push [tp this.gizmo (.x x .y y .onCurve true)]
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return this
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}
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define [Glyph.prototype.curve-to xc yc x y] : begin {
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this.contours`[this.contours.length - 1].push [tp this.gizmo (.x xc .y yc .onCurve false)] [tp this.gizmo (.x x .y y .onCurve true)]
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return this
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}
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define [Glyph.prototype.cubic-to x1 y1 x2 y2 x y] : begin {
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local lastContour this.contours`[this.contours.length - 1]
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local lastPoint lastContour`[lastContour.length - 1]
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local segments [bezierCubic2Q2 lastPoint (.x x1 .y y1) (.x x2 .y y2) (.x x .y y)]
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foreach (p0 (.x xc .y yc) (.x xf .y yf)) [items-of segments] : this.curve-to xc yc xf yf
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return this
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}
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define [Glyph.prototype.reverse-last] : begin {
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this.contours.[this.contours.length - 1] = [this.contours.[this.contours.length - 1].reverse]
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}
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define [Glyph.prototype.put-shapes contours] : begin {
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# do not double-transform
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local t this.gizmo
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set this.gizmo id
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foreach contour [items-of contours] : begin {
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this.start-from contour.0.x contour.0.y
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for [local j 1] [j < contour.length] [inc j] : begin {
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local point contour`j
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if point.cubic [begin {
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local p2 contour`[j + 1]
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local p3 contour`[j + 2]
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this.cubic-to point.x point.y p2.x p2.y p3.x p3.y
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j = j + 2
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}] [if point.onCurve [this.line-to point.x point.y] [begin {
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local p2 contour`[j + 1]
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this.curve-to point.x point.y p2.x p2.y
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j = j + 1
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}]]
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}
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}
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set this.gizmo t
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return this
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}
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define [Glyph.prototype.include-glyph glyph] : this.put-shapes glyph.contours
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define [Glyph.prototype.create-stroke] : begin {
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local s : new Stroke
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s.gizmo = [Object.create this.gizmo]
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return s
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}
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exports.Glyph = Glyph |