mirror of
https://github.com/be5invis/Iosevka.git
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223 lines
9.4 KiB
Plaintext
223 lines
9.4 KiB
Plaintext
import '../support/point' as Point
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import '../support/transform' as : Transform && [object [transformPoint tp] [untransform utp] inverse]
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import [mix linreg clamp fallback] from '../support/utils'
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# Parameter generation
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export : define [calculateMetrics para] : begin
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define UPM 1000
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# Key metrics
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define WIDTH para.width
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define SB para.sb
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define CAP para.cap
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define XH para.xheight
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define DESCENDER : fallback para.descender (XH - CAP)
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define CONTRAST : fallback para.contrast 1
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# Key metrics for symbols
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define symbolMid : fallback para.symbolMid (XH * 0.65)
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define parenTop : symbolMid + para.parenSize / 2
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define parenBot : symbolMid - para.parenSize / 2
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define operTop : symbolMid + para.operSize / 2
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define operBot : symbolMid - para.operSize / 2
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define tackTop : symbolMid + para.tackSize / 2
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define tackBot : symbolMid - para.tackSize / 2
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define plusTop : symbolMid + (WIDTH - SB * 2) * 0.55
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define plusBot : symbolMid - (WIDTH - SB * 2) * 0.55
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# Transform constructors
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define [Italify angle shift] : begin
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local slope [Math.tan ([fallback angle para.slantAngle] / 180 * Math.PI)]
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return : new Transform 1 slope 0 1 [fallback shift : -slope * symbolMid] 0
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define [Upright angle shift] [Italify angle shift :.inverse]
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define [Scale sx sy] : new Transform sx 0 0 [fallback sy sx] 0 0
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define [Translate x y] : new Transform 1 0 0 1 x y
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define [Rotate angle] : new Transform [Math.cos angle] (-[Math.sin angle]) [Math.sin angle] [Math.cos angle] 0 0
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define globalTransform : Italify para.slantAngle
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define TANSLANT globalTransform.yx
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define SINSLANT : Math.sin (para.slantAngle / 180 * Math.PI)
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define COSSLANT : Math.cos (para.slantAngle / 180 * Math.PI)
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define HVCONTRAST : CONTRAST * COSSLANT + SINSLANT * TANSLANT
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# Orient parameters
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define UPWARD : new Point (-HVCONTRAST) 0
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define DOWNWARD : new Point HVCONTRAST 0
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define RIGHTWARD : new Point TANSLANT 1
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define LEFTWARD : new Point (- TANSLANT) (-1)
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define [Upward] : new Point (-HVCONTRAST) 0
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define [Downward] : new Point HVCONTRAST 0
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define [Rightward] : new Point this.gizmo.yx 1
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define [Leftward] : new Point (- this.gizmo.yx) (-1)
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# Style parameters
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define O para.overshoot
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define OX para.overshootx
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define OXHOOK para.oxhook
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define HOOK para.hook
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define AHOOK para.ahook
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define SHOOK para.shook
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define RHOOK para.rhook
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define JHOOK para.jhook
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define FHOOK para.fhook
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define HOOKX para.hookx
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define SMOOTH para.smooth
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define SMALLSMOOTH para.smallsmooth
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define STROKE para.stroke
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define DOTSIZE : fallback para.dotsize STROKE
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define PERIODSIZE : fallback para.periodsize DOTSIZE
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define BARPOS : fallback para.barpos 0.5
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define GBARPOS : fallback para.gbarpos 0.5
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define PBARPOS : fallback para.pbarpos 0.5
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define EBARPOS : fallback para.ebarpos BARPOS
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define OVERLAYPOS para.overlaypos
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define FIVEBARPOS para.fivebarpos
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define LONGJUT para.longjut
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define JUT para.jut
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define VJUT para.vjut
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define ACCENT para.accent
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define ACCENTX para.accentx
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define CTHIN : fallback para.cthin 0.75
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define CTHINB : fallback para.cthinb 0.5
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define SLAB para.slab
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define TAILADJX : WIDTH * 0.2
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define TAILADJY : XH * 0.25
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define LBALANCE : LONGJUT * 0.04
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define IBALANCE : fallback para.ibalance (LONGJUT * 0.04)
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define LBALANCE2 : LONGJUT * 0.14
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define IBALANCE2 : fallback para.ibalance (LONGJUT * 0.14)
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define JBALANCE : fallback para.jbalance 0
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define JBALANCE2 : fallback para.jbalance2 (STROKE * 0.25 + LBALANCE)
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define TBALANCE : fallback para.tbalance JBALANCE
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define TBALANCE2 : fallback para.tbalance2 TBALANCE
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define RBALANCE : fallback para.rbalance (JBALANCE * 0.3)
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define RBALANCE2 : fallback para.rbalance2 0
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define FBALANCE : fallback para.fbalance 0
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define ONEBALANCE : fallback para.onebalance 0
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# derived metrics
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define NO_DIVERSITY : para.diversityM == 1 && para.diversityF == 1 && para.diversityI == 1 && para.diversityII == 1
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define FULLWIDTH0 : if NO_DIVERSITY (WIDTH * 2) UPM
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define FULLWIDTH : if (para.spacing >= 2) FULLWIDTH0 WIDTH
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define FULLWIDTH1 : if (para.spacing >= 1) FULLWIDTH0 WIDTH
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define FULLWIDTH2 : if (para.spacing >= 2) FULLWIDTH0 WIDTH
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define FULLWIDTH3 : if (para.spacing >= 3) FULLWIDTH0 WIDTH
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define OXE : OX - O
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define ESS : STROKE * [fallback para.essx CONTRAST]
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define ESSQUESTION : STROKE * [fallback para.essxq CONTRAST]
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define XO : XH - O
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define CAPO : CAP - O
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define HALFSTROKE : STROKE / 2
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define RIGHTSB : WIDTH - SB
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define FWRSB : FULLWIDTH - SB
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define MIDDLE : WIDTH / 2
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define FWMIDDLE : FULLWIDTH / 2
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define CAPMIDDLE : CAP / 2
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define CAP_SMOOTH : CAP - SMOOTH
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define DOTRADIUS : DOTSIZE / 2
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define PERIODRADIUS : PERIODSIZE / 2
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define SIDEJUT : JUT - HALFSTROKE * HVCONTRAST
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define SMOOTHA : SMOOTH - TANSLANT * para.smoothadjust
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define SMOOTHB : SMOOTH + TANSLANT * para.smoothadjust
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define SMALLSMOOTHA : SMALLSMOOTH - TANSLANT * para.smoothadjust
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define SMALLSMOOTHB : SMALLSMOOTH + TANSLANT * para.smoothadjust
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define CORRECTION_OMIDX : TANSLANT * [linreg 18 1.3 126 0.9 STROKE]
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define CORRECTION_OMIDS : STROKE * CORRECTION_OMIDX
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# Blackness parameters
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# We will estimate blackness using lower-case 'e'
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define [WHITENESS div] : begin
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local w : WIDTH * [fallback div 1] - SB * 2
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return : ((XH - STROKE * 3) * w * (1 / 3)) / (XH * w)
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define [adviceBlackness crowdedness div mul] : begin
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local gap : (WIDTH * [fallback div 1]) - SB * 2
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local shrink : (1 - [WHITENESS 1]) / (crowdedness * HVCONTRAST)
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return : Math.min STROKE ([fallback mul 1] * gap * shrink)
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define [adviceBlackness2 cowX cowY refH div] : Math.min
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adviceBlackness cowX (refH / WIDTH)
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adviceBlackness cowY div
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define [MVERTSTROKE_D div] : adviceBlackness [fallback para.lllcrowdedness (3 + 1 / 3)] div
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define MVERTSTROKE : MVERTSTROKE_D 1
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define OVERLAYSTROKE : adviceBlackness 3.75
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define OPERATORSTROKE : adviceBlackness 3.2
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define GEOMETRYSTROKE : adviceBlackness 4.5
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define SHOULDERFINE : Math.min (STROKE * para.shoulderfineMin) [adviceBlackness 16]
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define SUPERNESS : fallback para.superness 2
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define [superxy x] : Math.pow (1 - [Math.pow x SUPERNESS]) (1 / SUPERNESS)
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define [adviceSSmooth y sign _stroke] : begin
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local stroke : fallback _stroke STROKE
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local ss : y * 0.21 + stroke * 0.22 * [clamp 1 2 : linreg 126 1 137 1.025 stroke] + 0.04 * (RIGHTSB - SB)
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return : ss + sign * TANSLANT * para.smoothadjust * (ss / SMALLSMOOTH)
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define [adviceGlottalStopSmooth y sign] : ((y - STROKE) * 0.24 + STROKE * 0.625) + sign * TANSLANT * para.smoothadjust
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define [shoulderMidSlope _fine _stroke _dir] : 0.5 * HVCONTRAST * ([fallback _stroke STROKE] - [fallback _fine SHOULDERFINE]) / [fallback _stroke STROKE] + [fallback _dir 1] * TANSLANT
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return [object
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UPM WIDTH SB CAP XH DESCENDER CONTRAST
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symbolMid parenTop parenBot operTop operBot tackTop tackBot plusTop plusBot Italify Upright Scale Translate Rotate globalTransform
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TANSLANT SINSLANT COSSLANT HVCONTRAST UPWARD DOWNWARD RIGHTWARD LEFTWARD
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Upward Downward Leftward Rightward
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O OX OXHOOK HOOK AHOOK SHOOK RHOOK JHOOK FHOOK HOOKX SMOOTH SMALLSMOOTH STROKE DOTSIZE PERIODSIZE
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BARPOS GBARPOS PBARPOS EBARPOS OVERLAYPOS FIVEBARPOS LONGJUT JUT VJUT ACCENT ACCENTX CTHIN CTHINB SLAB
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TAILADJX TAILADJY LBALANCE IBALANCE LBALANCE2 IBALANCE2 JBALANCE JBALANCE2 TBALANCE TBALANCE2 RBALANCE RBALANCE2
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FBALANCE ONEBALANCE FULLWIDTH FULLWIDTH0 FULLWIDTH1 FULLWIDTH2 FULLWIDTH3 OXE ESS ESSQUESTION XO CAPO HALFSTROKE RIGHTSB FWRSB
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MIDDLE FWMIDDLE CAPMIDDLE CAP_SMOOTH DOTRADIUS PERIODRADIUS SIDEJUT SMOOTHA SMOOTHB SMALLSMOOTHA SMALLSMOOTHB CORRECTION_OMIDX CORRECTION_OMIDS
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WHITENESS adviceBlackness adviceBlackness2 MVERTSTROKE MVERTSTROKE_D OVERLAYSTROKE OPERATORSTROKE GEOMETRYSTROKE SHOULDERFINE SUPERNESS superxy
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adviceSSmooth adviceGlottalStopSmooth shoulderMidSlope]
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export : define [setFontMetrics para metrics font] : begin
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define [object CAP DESCENDER XH WIDTH] metrics
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# Metric metadata
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# Note: we use 1000upm in design, and (1000 * upmsacle)upm in production, to avoid rounding error.
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define asc : para.leading * CAP / (CAP - DESCENDER)
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define desc : para.leading * DESCENDER / (CAP - DESCENDER)
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define descenderPad : fallback para.descenderPad 0
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define winMetricPad : fallback para.winMetricPad 0
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set font.OS_2.xAvgCharWidth WIDTH
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set font.head.unitsPerEm 1000
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set font.hhea.ascender asc
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set font.OS_2.usWinAscent asc
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set font.OS_2.sTypoAscender asc
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set font.hhea.descender (DESCENDER - descenderPad)
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set font.OS_2.usWinDescent ([Math.abs desc] + descenderPad + winMetricPad)
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set font.OS_2.sTypoDescender (desc - descenderPad + winMetricPad)
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set font.hhea.lineGap (para.leading - asc + DESCENDER)
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set font.OS_2.sTypoLineGap (para.leading - asc + desc)
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set font.OS_2.sxHeight XH
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set font.OS_2.sCapHeight CAP
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set font.post.italicAngle (0 - para.slantAngle)
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export : define designParameters : object
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equal_wideness 0.075
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logic_narrow_shrink 0.75
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geometric_large_x (1 + 2 / 3)
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geometric_small_x (3 / 5)
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arrow_size (3 / 8)
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# ()
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parenOutside 0.2
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parenInside 0.9
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parenCurliness 0.7
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parenOvershoot 0.0375
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# []
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bracketOutside 0.1
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bracketInside 0.95
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# {}
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braceOutside 0.05
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braceInside 0.95
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braceCurlyM1 0.6
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braceCurlyM2 0.45
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braceOvershoot 0.02
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