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Diffstat (limited to 'layout/reftests/fonts/math/generate.py')
| -rw-r--r-- | layout/reftests/fonts/math/generate.py | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/layout/reftests/fonts/math/generate.py b/layout/reftests/fonts/math/generate.py new file mode 100644 index 0000000000..54e1f05f50 --- /dev/null +++ b/layout/reftests/fonts/math/generate.py @@ -0,0 +1,336 @@ +#!/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 +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +# For general fontforge documentation, see: +# http://fontforge.sourceforge.net/ +# For fontforge scripting documentation, see: +# http://fontforge.sourceforge.net/scripting-tutorial.html +# http://fontforge.sourceforge.net/scripting.html +# and most importantly: +# http://fontforge.sourceforge.net/python.html + +# To install what you need, on Ubuntu, +# sudo apt-get install python-fontforge + +from __future__ import print_function, absolute_import +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 Fraction Parameters +f = newMathFont("fraction-1") +f.math.FractionRuleThickness = 20 * em +f.math.FractionNumeratorShiftUp = 0 +f.math.FractionNumeratorDisplayStyleShiftUp = 0 +f.math.FractionDenominatorShiftDown = 0 +f.math.FractionNumeratorGapMin = 0 +f.math.FractionDenominatorGapMin = 0 +f.math.FractionNumeratorDisplayStyleShiftUp = 0 +f.math.FractionDenominatorDisplayStyleShiftDown = 0 +f.math.FractionNumeratorDisplayStyleGapMin = 0 +f.math.FractionDenominatorDisplayStyleGapMin = 0 +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) |