Optimize shape of Latin Phi, fix doc. (#1991)

changes/27.0.0.md

@@ -7,5 +7,9 @@
   - `upper-r`.`straight-open-motion-serifed` → `upper-r`.`straight-open-top-left-serifed`
   - `upper-r`.`curly-open-motion-serifed` → `upper-r`.`curly-open-top-left-serifed`
   - `upper-r`.`standing-open-motion-serifed` → `upper-r`.`standing-open-top-left-serifed`
+* Add bottom-right and top-left bottom-right serifed variants of `R`.
+* Add top-right, bottom-left, and top-right bottom-left variants of Cyrillic Ya (`Я`,`я`).
+* Allow R Rotunda (`U+A75A`, `U+A75B`) and Indian Rupee Sign (`U+20B9`) to have a bottom-right serif.
 * Add OpenType `zero` feature (#1966).
 * Fix broken geometry of `U+AB3A` under condensed width.
+* Improve bowl shape of Latin Phi (`U+0278`).

changes/archives/26.x/26.3.3.md

@@ -2,9 +2,6 @@
   - `lower-alpha`.`tailed-barred` → `lower-alpha`.`barred-tailed`
   - `lower-alpha`.`tailed-barred-earless-corner` → `lower-alpha`.`barred-earless-corner-tailed`
 * Add barred-serifed and barred-earless-rounded variants for Greek Alpha (`α`).
-* Add bottom-right and top-left bottom-right serifed variants of `R`.
-* Add top-right, bottom-left, and top-right bottom-left variants of Cyrillic Ya (`Я`,`я`).
-* Allow R Rotunda (`U+A75A`, `U+A75B`) and Indian Rupee Sign (`U+20B9`) to have a bottom-right serif.
 * Remove serifs in `U+0320` (#1979).
 * Harmonize dot sizes in ellipsis shapes (#1980).
 * Make italic Cyrillic Small Pe with Middle Hook (`U+04A7`) follow variants of `n` (#1983).
@@ -18,6 +15,6 @@
 * Fix `cv28` and `cv68` for `ss02` and `ss17` under italics.
 * Fix `cv30` for `ss04` under italics.
 * Fix `cv42` for `ss13`.
-* Fix `cv69` and `cv70` for `ss15` and `ss17`.
+* Fix `cv69` and `cv70` for `ss17`.
 * Fix `cv77` and `cv78` for `ss15` under italics.
 * Fix serifs of `w` for `ss15` under upright slab.

font-src/glyphs/letter/greek/upper-phi.ptl

@@ -46,6 +46,14 @@ glyph-block Letter-Greek-Upper-Phi : begin
 		include : VBar.m df.middle Descender HalfStroke
 		include : VBar.m df.middle (XH - HalfStroke) Ascender
 
+	create-glyph 'latn/phi' 0x278 : glyph-proc
+		local df : include : DivFrame para.diversityM 3
+		include [refer-glyph 'grek/varphi'] AS_BASE ALSO_METRICS
+
+		if SLAB : begin
+			include : tagged 'serifMT' : HSerif.lt df.middle Ascender Jut
+			include : tagged 'serifMB' : HSerif.mb df.middle Descender Jut
+
 	create-glyph 'cyrl/ef.serifless' : glyph-proc
 		local df : include : DivFrame para.diversityM 3
 		include : df.markSet.bp
@@ -93,4 +101,3 @@ glyph-block Letter-Greek-Upper-Phi : begin
 			curl xBarRight (0 - O)
 
 	select-variant 'cyrl/ef' 0x444
-	select-variant 'latn/phi' 0x278 (shapeFrom -- 'cyrl/ef')

params/variants.toml

@@ -5347,22 +5347,6 @@ selector."cyrl/ef"  = "serifed"
 
 
 
-[prime.latn-phi]
-# Untagged -- shape change only
-[prime.latn-phi.variants.serifless]
-rank = 1
-selector."latn/phi"  = "serifless"
-
-[prime.latn-phi.variants.top-serifed]
-rank = 2
-selector."latn/phi"  = "topSerifed"
-
-[prime.latn-phi.variants.serifed]
-rank = 3
-selector."latn/phi"  = "serifed"
-
-
-
 [prime.cyrl-che]
 sampler = "ч"
 samplerExplain = "Cyrillic Lower Che"
@@ -6928,7 +6912,6 @@ x = "straight-serifless"
 z = "straight-serifless"
 # Non-latin
 long-s = "bent-hook-serifless"
-latn-phi = "serifless"
 lower-thorn = "serifless"
 lower-alpha = "crossing"
 lower-delta = "rounded"
@@ -7077,7 +7060,6 @@ x = "straight-serifed"
 z = "straight-serifed"
 one = "base"
 seven = "straight-serifed"
-latn-phi = "serifed"
 lower-thorn = "serifed"
 long-s = "bent-hook-bottom-serifed"
 capital-gamma = "serifed"
@@ -7127,7 +7109,6 @@ x = "cursive"
 y = "cursive-motion-serifed"
 z = "cursive"
 eszet = "sulzbacher-tailed-serifless"
-latn-phi = "serifed"
 long-s = "flat-hook-tailed"
 lower-mu = "tailed-motion-serifed"
 cyrl-ze = "unilateral-inward-serifed"