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#!/usr/bin/python
# vim: set shiftwidth=4 tabstop=8 autoindent expandtab:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# For general fontforge documentation, see:
# For fontforge scripting documentation, see:
# and most importantly:
# To install what you need, on Ubuntu,
# sudo apt-get install python-fontforge
import fontforge
em = 1000
def newMathFont(aName):
print("Generating %s.otf..." % aName, end="")
mathFont = fontforge.font()
mathFont.fontname = aName
mathFont.familyname = aName
mathFont.fullname = aName
mathFont.copyright = "Copyright (c) 2014 Mozilla Corporation"
mathFont.encoding = "UnicodeFull"
# Create a space character. Also force the creation of some MATH subtables
# so that OTS will not reject the MATH table.
g = mathFont.createChar(ord(" "), "space")
g.width = em
g.italicCorrection = 0
g.topaccent = 0
g.mathKern.bottomLeft = tuple([(0, 0)])
g.mathKern.bottomRight = tuple([(0, 0)])
g.mathKern.topLeft = tuple([(0, 0)])
g.mathKern.topRight = tuple([(0, 0)])
mathFont[ord(" ")].horizontalVariants = "space"
mathFont[ord(" ")].verticalVariants = "space"
return mathFont
def saveMathFont(aFont):
aFont.em = em
aFont.ascent = aFont.descent = em / 2
aFont.hhea_ascent = aFont.os2_typoascent = aFont.os2_winascent = em / 2
aFont.descent = aFont.hhea_descent = em / 2
aFont.os2_typodescent = aFont.os2_windescent = em / 2
aFont.hhea_ascent_add = aFont.hhea_descent_add = 0
aFont.os2_typoascent_add = aFont.os2_typodescent_add = 0
aFont.os2_winascent_add = aFont.os2_windescent_add = 0
aFont.os2_use_typo_metrics = True
aFont.generate(aFont.fontname + ".otf")
print(" done.")
def createSquareGlyph(aFont, aCodePoint):
g = aFont.createChar(aCodePoint)
p = g.glyphPen()
p.moveTo(0, 0)
p.lineTo(em, 0)
p.lineTo(em, em)
p.lineTo(0, em)
p.closePath()
def createLLTriangleGlyph(aFont, aCodePoint):
g = aFont.createChar(aCodePoint)
p = g.glyphPen()
p.moveTo(0, 0)
p.lineTo(em, 0)
p.lineTo(0, em)
p.closePath()
def createURTriangleGlyph(aFont, aCodePoint):
g = aFont.createChar(aCodePoint)
p = g.glyphPen()
p.moveTo(em, 0)
p.lineTo(em, em)
p.lineTo(0, em)
p.closePath()
def createDiamondGlyph(aFont, aCodePoint):
g = aFont.createChar(aCodePoint)
p = g.glyphPen()
p.moveTo(0, em / 2)
p.lineTo(em / 2, 0)
p.lineTo(em, em / 2)
p.lineTo(em / 2, em)
p.closePath()
################################################################################
# Glyph variants and constructions
f = newMathFont("stretchy")
nvariants = 3
# Draw boxes for the size variants and glues
for i in range(0, nvariants):
s = em * (i + 1)
g = f.createChar(-1, "h%d" % i)
p = g.glyphPen()
p.moveTo(0, -em)
p.lineTo(0, em)
p.lineTo(s, em)
p.lineTo(s, -em)
p.closePath()
g.width = s
g = f.createChar(-1, "v%d" % i)
p = g.glyphPen()
p.moveTo(0, 0)
p.lineTo(0, s)
p.lineTo(2 * em, s)
p.lineTo(2 * em, 0)
p.closePath()
g.width = 2 * em
# Draw some pieces for stretchy operators
s = em * nvariants
g = f.createChar(-1, "left")
p = g.glyphPen()
p.moveTo(0, -2 * em)
p.lineTo(0, 2 * em)
p.lineTo(s, em)
p.lineTo(s, -em)
p.closePath()
g.width = s
g = f.createChar(-1, "right")
p = g.glyphPen()
p.moveTo(0, -em)
p.lineTo(0, em)
p.lineTo(s, 2 * em)
p.lineTo(s, -2 * em)
p.closePath()
g.width = s
g = f.createChar(-1, "hmid")
p = g.glyphPen()
p.moveTo(0, -em)
p.lineTo(0, em)
p.lineTo(s, 2 * em)
p.lineTo(2 * s, em)
p.lineTo(2 * s, -em)
p.lineTo(s, -2 * em)
p.closePath()
g.width = 2 * s
g = f.createChar(-1, "bottom")
p = g.glyphPen()
p.moveTo(0, 0)
p.lineTo(0, s)
p.lineTo(2 * em, s)
p.lineTo(4 * em, 0)
p.closePath()
g.width = 4 * em
g = f.createChar(-1, "top")
p = g.glyphPen()
p.moveTo(0, 0)
p.lineTo(4 * em, 0)
p.lineTo(2 * em, -s)
p.lineTo(0, -s)
p.closePath()
g.width = 4 * em
g = f.createChar(-1, "vmid")
p = g.glyphPen()
p.moveTo(0, s)
p.lineTo(2 * em, s)
p.lineTo(4 * em, 0)
p.lineTo(2 * em, -s)
p.lineTo(0, -s)
p.closePath()
g.width = 3 * em
# Create small rectangle of various size for some exotic arrows that are
# unlikely to be stretchable with standard fonts.
hstretchy = [
0x219C, # leftwards wave arrow
0x219D, # rightwards wave arrow
0x219E, # leftwards two headed arrow
0x21A0, # rightwards two headed arrow
0x21A2, # leftwards arrow with tail
]
vstretchy = [
0x219F, # upwards two headed arrow
0x21A1, # downwards two headed arrow
0x21A5, # upwards arrow from bar
0x21A7, # downwards arrow from bar
0x21A8, # up down arrow with base
]
for i in range(0, 1 + nvariants + 1):
s = (i + 1) * em / 10
g = f.createChar(hstretchy[i])
p = g.glyphPen()
p.moveTo(0, -em / 10)
p.lineTo(0, em / 10)
p.lineTo(s, em / 10)
p.lineTo(s, -em / 10)
p.closePath()
g.width = s
g = f.createChar(vstretchy[i])
p = g.glyphPen()
p.moveTo(0, 0)
p.lineTo(0, s)
p.lineTo(2 * em / 10, s)
p.lineTo(2 * em / 10, 0)
p.closePath()
g.width = 2 * em / 10
# hstretchy[0] and vstretchy[0] have all the variants and the components. The others only have one of them.
s = em * nvariants
f[hstretchy[0]].horizontalVariants = "uni219C h0 h1 h2"
f[hstretchy[0]].horizontalComponents = (
("left", False, 0, 0, s),
("h2", True, 0, 0, s),
("hmid", False, 0, 0, 2 * s),
("h2", True, 0, 0, s),
("right", False, 0, 0, s),
)
f[hstretchy[1]].horizontalVariants = "uni219D h0"
f[hstretchy[2]].horizontalVariants = "uni219E h1"
f[hstretchy[3]].horizontalVariants = "uni21A0 h2"
f[hstretchy[4]].horizontalVariants = "uni21A2 h2"
f[hstretchy[4]].horizontalComponents = f[hstretchy[0]].horizontalComponents
f[vstretchy[0]].verticalVariants = "uni219F v0 v1 v2"
f[vstretchy[0]].verticalComponents = (
("bottom", False, 0, 0, s),
("v2", True, 0, 0, s),
("vmid", False, 0, 0, 2 * s),
("v2", True, 0, 0, s),
("top", False, 0, 0, s),
)
f[vstretchy[1]].verticalVariants = "uni21A1 v0"
f[vstretchy[2]].verticalVariants = "uni21A5 v1"
f[vstretchy[3]].verticalVariants = "uni21A7 v2"
f[vstretchy[4]].verticalVariants = "uni21A8"
f[vstretchy[4]].verticalComponents = f[vstretchy[0]].verticalComponents
################################################################################
# Testing DisplayOperatorMinHeight
f.math.DisplayOperatorMinHeight = 8 * em
largeop = [0x2A1B, 0x2A1C] # integral with overbar/underbar
# Draw boxes of size 1, 2, 7, 8, 9em.
for i in [1, 2, 7, 8, 9]:
s = em * i
if i == 1 or i == 2:
g = f.createChar(largeop[i - 1])
else:
g = f.createChar(-1, "L%d" % i)
p = g.glyphPen()
p.moveTo(0, 0)
p.lineTo(0, s)
p.lineTo(s, s)
p.lineTo(s, 0)
p.closePath()
g.width = s
f[largeop[0]].verticalVariants = "uni2A1B L7 L8 L9"
f[largeop[1]].verticalVariants = "uni2A1C L8"
saveMathFont(f)
################################################################################
# Testing AxisHeight
f = newMathFont("axis-height-1")
f.math.AxisHeight = 0
createSquareGlyph(f, ord("+"))
saveMathFont(f)
f = newMathFont("axis-height-2")
f.math.AxisHeight = 20 * em
createSquareGlyph(f, ord("+"))
saveMathFont(f)
################################################################################
# Testing Limits Parameters
f = newMathFont("limits-5")
f.math.UpperLimitGapMin = 0
f.math.UpperLimitBaselineRiseMin = 0
f.math.LowerLimitGapMin = 0
f.math.LowerLimitBaselineDropMin = 0
f.math.AccentBaseHeight = 6 * em
f.math.FlattenedAccentBaseHeight = 3 * em
createSquareGlyph(f, ord("~"))
saveMathFont(f)
f = newMathFont("dtls-1")
createSquareGlyph(f, ord("a"))
createLLTriangleGlyph(f, ord("b"))
createSquareGlyph(f, ord("c"))
createDiamondGlyph(f, 0x1D51E) # mathvariant=fraktur a
createURTriangleGlyph(f, 0x1D51F) # mathvariant=fraktur b
createDiamondGlyph(f, 0x1D520) # mathvariant=fraktur c
f.addLookup("gsub", "gsub_single", (), (("dtls", (("latn", ("dflt")),)),))
f.addLookupSubtable("gsub", "gsub_n")
glyph = f["a"]
glyph.addPosSub("gsub_n", "b")
glyph2 = f[0x1D51F]
glyph2.glyphname = "urtriangle"
glyph3 = f[0x1D51E]
glyph3.addPosSub("gsub_n", "urtriangle")
saveMathFont(f)