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Merged
be5invis merged 4 commits into from
Nov 21, 2025
Merged

Add latin vy #2956

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afe791b
vy
Logo121 Nov 20, 2025
d1fca50
Use ALL-OUTER instead since it is always MIDH-TOP
Logo121 Nov 20, 2025
f57927e
clipping fixes
Logo121 Nov 20, 2025
bb61e53
more fixes in edge cases
Logo121 Nov 20, 2025
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4 changes: 4 additions & 0 deletions changes/33.3.5.md
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Original file line number Diff line number Diff line change
Expand Up @@ -4,3 +4,7 @@
- CYRILLIC CAPITAL LETTER SHHA (`U+04BA`).
- CYRILLIC CAPITAL LETTER SHHA WITH DESCENDER (`U+0526`).
- CYRILLIC CAPITAL LETTER HWE (`U+A694`).
* Refine spacing of diagonal-tailed `i` and `j`.
* Add Characters:
- LATIN CAPITAL LETTER VY (`U+A760`).
- LATIN SMALL LETTER VY (`U+A761`).
188 changes: 96 additions & 92 deletions packages/font-glyphs/src/letter/latin/lower-y.ptl
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Original file line number Diff line number Diff line change
Expand Up @@ -30,17 +30,25 @@ glyph-block Letter-Latin-Lower-Y : begin
define BS-TURN 1
define BS-LOOP 2

define [GenNonCursiveShape straightBar bottomShape slabKind] : namespace
glyph-block-export NonCursiveYShapeT NonCursiveYConfig
define [NonCursiveYShapeT straightBar bottomShape slabKind _l _r _sb _sw] : namespace
local { doSlabTop doSlabBottom doSlabMotion } slabKind

local l : fallback _l 0
local r : fallback _r Width
local m : mix l r 0.5
local sb : fallback _sb SB
local rsb : r + l - sb
local sw : fallback _sw Stroke

local useStraightBottom : straightBar && !bottomShape
local slabCurly : doSlabTop && !straightBar
local slabCurlyNoTurnT : doSlabTop && !straightBar && !bottomShape
local slabCurlyNoTurnB : doSlabBottom && !straightBar && !bottomShape
local bottomIsNotVertical : doSlabBottom || useStraightBottom || bottomShape

define yBottomJut : Jut * 1.25
define slabysize : 0.5 * yBottomJut * (Width / HalfUPM) + Stroke
define slabysize : 0.5 * yBottomJut * (Width / HalfUPM) + sw

define [CalcDS top bottom] : begin
local pds 0.1
Expand All @@ -53,7 +61,7 @@ glyph-block Letter-Latin-Lower-Y : begin
return {ds ds2}

define [Metrics ts kShrink] : namespace
define pxHookRightOffset : [StrokeWidthBlend (0.5 * TailX) (0.375 * TailX)] / (RightSB - SB)
define pxHookRightOffset : [StrokeWidthBlend (0.5 * TailX) (0.375 * TailX)] / (rsb - sb)
export : define px1 : 0.84 - [if (ts == TS-HOOK-RIGHT) pxHookRightOffset 0]
export : define py1 : [StrokeWidthBlend 0.8 0.76] * [if slabCurly [StrokeWidthBlend 1 0.9] 1]
export : define px2 : if slabCurlyNoTurnB px1 0.95
Expand All @@ -62,9 +70,9 @@ glyph-block Letter-Latin-Lower-Y : begin
export : define dpy1 : (1 - [linreg (1 - px2) (1 - py2) px1 py1 1]) / (1 - py1)
export : define dpy2 : (1 - [linreg (1 - px1) (1 - py1) px2 py2 1]) / (1 - py2)

define yrstrokel0 : mix Middle 0 0.2
export : define yrstrokel : yrstrokel0 + [HSwToV : Stroke * [if bottomIsNotVertical (2 / 3) (1 / 3)] * [if slabCurly [StrokeWidthBlend 0.95 0.97] 1]]
export : define yrstroker : mix Width RightSB : if straightBar DesignParameters.straightSmallYShapeSbShrink 1
define yrstrokel0 : mix l r 0.4
export : define yrstrokel : yrstrokel0 + [HSwToV : sw * [if bottomIsNotVertical (2 / 3) (1 / 3)] * [if slabCurly [StrokeWidthBlend 0.95 0.97] 1]]
export : define yrstroker : mix r rsb : if straightBar DesignParameters.straightSmallYShapeSbShrink 1

export : define yshrink : mix 1 ([StrokeWidthBlend 1 0.85] * [if straightBar ([AdviceStroke 3.25] / Stroke) 1]) kShrink

Expand All @@ -79,35 +87,35 @@ glyph-block Letter-Latin-Lower-Y : begin

export : define [yJoinHeight top bottom] : begin
local {ds ds2} : CalcDS top bottom
return : mix (bottom + ds2) (top - ds) [yJoinProportion Middle]
return : mix (bottom + ds2) (top - ds) [yJoinProportion m]

export : define [createSplitMask top bottom dir elev] : begin
local {ds ds2} : CalcDS top bottom
local jp0 : yJoinProportion : mix Middle 0 dir
local jp1 : yJoinProportion : mix Middle Width dir
local hs : 0.75 * Stroke
local jp0 : yJoinProportion : mix m l dir
local jp1 : yJoinProportion : mix m r dir
local hs : 0.75 * sw
local yLeft : [mix (bottom + ds2) (top - ds) jp1] + hs - [fallback elev 0]
local yRight : [mix (bottom + ds2) (top - ds) jp0] + hs - [fallback elev 0]
local yMin : Math.min bottom yLeft yRight
return : spiro-outline
corner Width yMin
corner Width yRight
corner 0 yLeft
corner 0 yMin
corner r yMin
corner r yRight
corner l yLeft
corner l yMin

define [RightHalf ts kShrink] : namespace
export : define [RightHalf ts kShrink] : namespace
local me : Metrics ts kShrink

export : define [topKnots top bottom] : begin
local {ds} : CalcDS top bottom
return : piecewise
(ts == TS-HOOK-RIGHT) : list
straight.left.start ([mix me.yrstrokel me.yrstroker me.px1] - HalfStroke + 0.875 * TailX) (top - Stroke - O) [widths.rhs]
straight.left.start ([mix me.yrstrokel me.yrstroker me.px1] - (sw / 2) + 0.875 * TailX) (top - sw - O) [widths.rhs sw]
alsoThruThem {{[StrokeWidthBlend 0.58 0.65] 0.2} {[StrokeWidthBlend 0.78 0.85] 0.5}} important
straightBar : list
flat me.yrstroker top [widths.rhs.heading ([me.diagCor (top - bottom)] * Stroke) Downward]
flat me.yrstroker top [widths.rhs.heading ([me.diagCor (top - bottom)] * sw) Downward]
true : list
flat me.yrstroker top [widths.rhs.heading Stroke Downward]
flat me.yrstroker top [widths.rhs.heading sw Downward]
curl me.yrstroker (top - ds) [heading Downward]
quadControls 0 me.dpy1 16

Expand All @@ -118,7 +126,7 @@ glyph-block Letter-Latin-Lower-Y : begin
define coJoinY : mix (bottom + ds2) (top - ds) me.py1
define joinX : mix me.yrstrokel me.yrstroker (1 - me.px2)
define joinY : mix (bottom + ds2) (top - ds) (1 - me.py2)
define [ConnectZ shrink] [curl joinX joinY [widths.rhs : Stroke * shrink]]
define [ConnectZ shrink] [curl joinX joinY [widths.rhs : sw * shrink]]

return : list
if (straightBar && ts != TS-HOOK-RIGHT)
Expand All @@ -128,32 +136,32 @@ glyph-block Letter-Latin-Lower-Y : begin
piecewise
useStraightBottom : list
ConnectZ me.yshrink
curl [mix me.yrstroker joinX ((top - bottom) / (top - joinY))] bottom [widths.rhs.heading ([me.diagCor (top - bottom)] * Stroke) Downward]
curl [mix me.yrstroker joinX ((top - bottom) / (top - joinY))] bottom [widths.rhs.heading ([me.diagCor (top - bottom)] * sw) Downward]
(bottomShape == BS-LOOP) : begin
local joinHeight1 : me.yJoinHeight top bottom
local k : Math.abs : 1 / [Math.sin : Math.atan2 (joinX - Middle) (joinY - joinHeight1)] - 0.25
local joinHeight3 : k * Stroke + joinHeight1
local deltaX : Math.max yBottomJut : HSwToV : 1.2 * Stroke
local fine : AdviceStroke 3
local k : Math.abs : 1 / [Math.sin : Math.atan2 (joinX - m) (joinY - joinHeight1)] - 0.25
local joinHeight3 : k * sw + joinHeight1
local deltaX : Math.max yBottomJut : HSwToV : 1.2 * sw
local fine : [AdviceStroke 3] / Stroke * sw
local xLoopLeft : Math.min (joinX - [HSwToV : 1.5 * fine]) : Math.max ((-0.25) * SB) : mix joinX (me.yrstrokel - deltaX) 2
local xCenter : mix xLoopLeft joinX 0.5
list
ConnectZ me.yshrink
g2.left.mid [arch.adjust-x.bot xCenter fine] bottom [widths.rhs]
g2.left.mid [arch.adjust-x.bot xCenter fine] bottom [widths.rhs sw]
archv
g2.up.mid xLoopLeft [mix bottom joinHeight3 0.5] [widths.rhs.heading fine Upward]
arcvh
flat xCenter joinHeight3 [heading Rightward]
curl Middle joinHeight3 [heading Rightward]
curl m joinHeight3 [heading Rightward]
(bottomShape == BS-TURN) : list
ConnectZ me.yshrink
flat (me.yrstrokel - slabysize) bottom [widths.rhs]
flat (me.yrstrokel - slabysize) bottom [widths.rhs sw]
curl [Math.min (me.yrstrokel - slabysize - TINY) (me.yrstrokel - Stroke - yBottomJut)] bottom
true : list
ConnectZ 1
quadControls 1 (1 - me.dpy2) 16
flat me.yrstrokel (bottom + ds2) [widths.heading 0 Stroke Downward]
curl me.yrstrokel bottom [widths.heading 0 Stroke Downward]
flat me.yrstrokel (bottom + ds2) [widths.rhs.heading sw Downward]
curl me.yrstrokel bottom [widths.rhs.heading sw Downward]

export : define [baseSerif top bottom] : glyph-proc
local {ds ds2} : CalcDS top bottom
Expand All @@ -163,9 +171,9 @@ glyph-block Letter-Latin-Lower-Y : begin
if bottomShape : return nothing
if (useStraightBottom) : begin
local xBaseKnot : mix me.yrstroker joinX ((top - bottom) / (top - joinY))
include : HSerif.lb (xBaseKnot - [HSwToV HalfStroke]) bottom yBottomJut
include : HSerif.lb (xBaseKnot - [HSwToV : sw / 2]) bottom yBottomJut
: else : begin
include : HSerif.lb (me.yrstrokel - [HSwToV HalfStroke]) bottom yBottomJut
include : HSerif.lb (me.yrstrokel - [HSwToV : sw / 2]) bottom yBottomJut

export : define [ogonekAttach top bottom] : glyph-proc
define {ds ds2} : CalcDS top bottom
Expand All @@ -180,17 +188,17 @@ glyph-block Letter-Latin-Lower-Y : begin

export : define [splitMask top bottom elev] : me.createSplitMask top bottom (-1) elev

define [LeftHalf ts kShrink] : namespace
export : define [LeftHalf ts kShrink] : namespace
local me : Metrics ts kShrink

export : define [topKnots top bottom] : begin
local {ds} : CalcDS top bottom
if straightBar
: then : return : list
flat (Width - me.yrstroker) top [widths.lhs.heading ([me.diagCor (top - bottom)] * Stroke) Downward]
flat (l + r - me.yrstroker) top [widths.lhs.heading ([me.diagCor (top - bottom)] * sw) Downward]
: else : return : list
flat (Width - me.yrstroker) top [widths.lhs.heading Stroke Downward]
curl (Width - me.yrstroker) (top - ds) [heading Downward]
flat (l + r - me.yrstroker) top [widths.lhs.heading sw Downward]
curl (l + r - me.yrstroker) (top - ds) [heading Downward]
quadControls 0 me.dpy1 16

export : define [joinKnots top bottom] : begin
Expand All @@ -199,85 +207,81 @@ glyph-block Letter-Latin-Lower-Y : begin
if straightBar : then : list
: else : list
flat
mix (Width - me.yrstrokel) (Width - me.yrstroker) me.px1
mix (l + r - me.yrstrokel) (l + r - me.yrstroker) me.px1
mix (bottom + ds2) (top - ds) me.py1
curl Middle
me.yJoinHeight top bottom
widths.lhs (Stroke * me.yshrink)
widths.lhs (sw * me.yshrink)

export : define [splitMask top bottom elev] : me.createSplitMask top bottom (+1) elev

export : define [SmallYShape top bottom] : glyph-proc
export : define [SmallYShape top bottom yShCutoff] : glyph-proc
local right : RightHalf TS-NONE SHRINK-NONE
local rightSh : RightHalf TS-NONE SHRINK-INNER
local left : LeftHalf TS-NONE SHRINK-INNER

local leftSplitMask : if (yShCutoff !== nothing)
union [MaskBelow yShCutoff] : left.splitMask top bottom
left.splitMask top bottom

include : right.ogonekAttach top bottom
include : union
include : tagged 'rightHalf' : union
intersection
dispiro
right.topKnots top bottom
right.baseKnots top bottom
left.splitMask top bottom
* leftSplitMask

difference
dispiro
right.topKnots top bottom
rightSh.baseKnots top bottom
left.splitMask top bottom
* leftSplitMask

difference
dispiro
left.topKnots top bottom
left.joinKnots top bottom
right.splitMask top bottom
Rect (bottom + HalfStroke) (bottom - top) 0 Width

if doSlabTop
let [sf : SerifFrame.fromDf [DivFrame 1] top bottom] : composite-proc sf.lt.full sf.rt.full
no-shape
if doSlabBottom
right.baseSerif top bottom
no-shape
if doSlabMotion
HSerif.lt SB top SideJut
no-shape

export : define [SmallYHookRightShape top bottom] : glyph-proc
include : tagged 'leftHalf' : difference
dispiro
left.topKnots top bottom
left.joinKnots top bottom
right.splitMask top bottom
Rect (bottom + sw / 2) (bottom - top) l r

if doSlabTop : include : let [sf : SerifFrame.fromDf [DivFrame 1] top bottom] : composite-proc sf.lt.full sf.rt.full
if doSlabBottom : include : right.baseSerif top bottom
if doSlabMotion : include : HSerif.lt sb top SideJut

export : define [SmallYHookRightShape top bottom yShCutoff] : glyph-proc
local right : RightHalf TS-HOOK-RIGHT SHRINK-NONE
local rightSh : RightHalf TS-HOOK-RIGHT SHRINK-INNER
local left : LeftHalf TS-NONE SHRINK-INNER

local leftSplitMask : if (yShCutoff !== nothing)
intersection [MaskAbove yShCutoff] : left.splitMask top bottom
left.splitMask top bottom

include : right.ogonekAttach top bottom
include : union
include : tagged 'rightHalf' : union
intersection
dispiro
right.topKnots top bottom
right.baseKnots top bottom
left.splitMask top bottom
* leftSplitMask

difference
dispiro
right.topKnots top bottom
rightSh.baseKnots top bottom
left.splitMask top bottom
* leftSplitMask

difference
dispiro
left.topKnots top bottom
left.joinKnots top bottom
right.splitMask top bottom
Rect (bottom + HalfStroke) (bottom - top) 0 Width

if doSlabTop
let [sf : SerifFrame.fromDf [DivFrame 1] top bottom] sf.lt.full
no-shape
if doSlabBottom
right.baseSerif top bottom
no-shape
if doSlabMotion
HSerif.lt SB top SideJut
no-shape
include : tagged 'leftHalf' : difference
dispiro
left.topKnots top bottom
left.joinKnots top bottom
right.splitMask top bottom
Rect (bottom + sw / 2) (bottom - top) l r

if doSlabTop : include : let [sf : SerifFrame.fromDf [DivFrame 1] top bottom] sf.lt.full
if doSlabBottom : include : right.baseSerif top bottom
if doSlabMotion : include : HSerif.lt sb top SideJut

export : define [SmallLambdaShape top bottom] : union : glyph-proc
set currentGlyph.gizmo : Italify (-para.slopeAngle)
Expand All @@ -295,7 +299,7 @@ glyph-block Letter-Latin-Lower-Y : begin
include : Scale (+1) (-1)
include : Translate 0 (+[mix bottom top 0.5])

define NonCursiveConfig : SuffixCfg.weave
define NonCursiveYConfig : SuffixCfg.weave
object # body
straight true
curly false
Expand All @@ -309,8 +313,8 @@ glyph-block Letter-Latin-Lower-Y : begin
serifed SLAB-ALL
motionSerifed SLAB-MOTION

foreach { suffix { straightBar bottomShape slabKind } } [Object.entries NonCursiveConfig] : do
define Shapes : GenNonCursiveShape straightBar bottomShape slabKind
foreach { suffix { straightBar bottomShape slabKind } } [Object.entries NonCursiveYConfig] : do
define Shapes : NonCursiveYShapeT straightBar bottomShape slabKind
create-glyph "y.\(suffix)" : glyph-proc
include : MarkSet.p
set-base-anchor 'strike' Middle (XH / 2)
Expand Down Expand Up @@ -357,7 +361,7 @@ glyph-block Letter-Latin-Lower-Y : begin
alias 'grek/lambda.curlyTailedTurnSerifless' null 'grek/lambdaTailed.curlyTurnSerifless'
alias 'latn/lambdaStroke.curlyTailedTurnSerifless' null 'latn/lambdaStrokeTailed.curlyTurnSerifless'

define Cursive : namespace
define CursiveYShape : namespace
export : define [Arc top bottom] : uBowl.shape
top -- top
bottom -- bottom
Expand Down Expand Up @@ -389,37 +393,37 @@ glyph-block Letter-Latin-Lower-Y : begin
include sf.lt.outer
if [not doSlabMotion] : include sf.rt.inner

define CursiveConfig : SuffixCfg.weave
define CursiveYConfig : SuffixCfg.weave
object # body
cursive Cursive.Hook
cursiveFlatHook Cursive.FlatHook
cursive CursiveYShape.Hook
cursiveFlatHook CursiveYShape.FlatHook
object # serifs
serifless SLAB-NONE
serifed SLAB-ALL
motionSerifed SLAB-CURSIVE-MOTION

foreach { suffix { hookShape slabKind } } [Object.entries CursiveConfig] : do
foreach { suffix { hookShape slabKind } } [Object.entries CursiveYConfig] : do
create-glyph "y.\(suffix)" : glyph-proc
include : MarkSet.p
set-base-anchor 'strike' Middle (XH / 2)
set-base-anchor 'yBelowDot' Middle Descender
include : Cursive.Arc XH 0
include : CursiveYShape.Arc XH 0
include : hookShape XH Descender
include : Cursive.Serifs XH slabKind
include : CursiveYShape.Serifs XH slabKind

if (slabKind !== SLAB-ALL) : create-glyph "yHookRight.\(suffix)" : glyph-proc
include : MarkSet.p
include : Cursive.Arc XH 0
include : CursiveYShape.Arc XH 0
include : hookShape (XH - TailY - HalfStroke) Descender
include : TopHook.toRight.rBarInner RightSB 0 XH
include : Cursive.Serifs XH slabKind
include : CursiveYShape.Serifs XH slabKind
eject-contour 'serifRT'

create-glyph "yCap.\(suffix)" : glyph-proc
include : MarkSet.capital
include : Cursive.Arc CAP (CAP - XH)
include : CursiveYShape.Arc CAP (CAP - XH)
include : hookShape CAP 0
include : Cursive.Serifs CAP slabKind
include : CursiveYShape.Serifs CAP slabKind

select-variant 'y' 'y'
link-reduced-variant 'y/sansSerif' 'y' MathSansSerif
Expand Down
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