The Tor Browser: layout/reftests/fonts/math/generate.py@a63d609f5ebe

     1 #!/usr/bin/python

     2 # vim: set shiftwidth=4 tabstop=8 autoindent expandtab:

     3 # This Source Code Form is subject to the terms of the Mozilla Public

     4 # License, v. 2.0. If a copy of the MPL was not distributed with this

     5 # file, You can obtain one at http://mozilla.org/MPL/2.0/.

     7 # For general fontforge documentation, see:

     8 #   http://fontforge.sourceforge.net/

     9 # For fontforge scripting documentation, see:

    10 #   http://fontforge.sourceforge.net/scripting-tutorial.html

    11 #   http://fontforge.sourceforge.net/scripting.html

    12 # and most importantly:

    13 #   http://fontforge.sourceforge.net/python.html

    15 # To install what you need, on Ubuntu,

    16 #   sudo apt-get install python-fontforge

    18 from __future__ import print_function

    19 import fontforge

    21 em = 1000

    23 def newMathFont(aName):

    24     print("Generating %s.otf..." % aName, end="")

    25     mathFont = fontforge.font()

    26     mathFont.fontname = aName

    27     mathFont.familyname = aName

    28     mathFont.fullname = aName

    29     mathFont.copyright = "Copyright (c) 2014 Mozilla Corporation"

    30     mathFont.encoding = "UnicodeFull"

    32     # Create a space character. Also force the creation of some MATH subtables

    33     # so that OTS will not reject the MATH table.

    34     g = mathFont.createChar(ord(" "), "space")

    35     g.width = em

    36     g.italicCorrection = 0

    37     g.topaccent = 0

    38     g.mathKern.bottomLeft = tuple([(0,0)])

    39     g.mathKern.bottomRight = tuple([(0,0)])

    40     g.mathKern.topLeft = tuple([(0,0)])

    41     g.mathKern.topRight = tuple([(0,0)])

    42     mathFont[ord(" ")].horizontalVariants = "space"

    43     mathFont[ord(" ")].verticalVariants = "space"

    44     return mathFont

    46 def saveMathFont(aFont):

    47     aFont.em = em

    48     aFont.ascent = aFont.descent = em/2

    49     aFont.hhea_ascent = aFont.os2_typoascent = aFont.os2_winascent = em/2

    50     aFont.descent = aFont.hhea_descent = em/2

    51     aFont.os2_typodescent = aFont.os2_windescent = em/2

    52     aFont.hhea_ascent_add = aFont.hhea_descent_add = 0

    53     aFont.os2_typoascent_add = aFont.os2_typodescent_add = 0

    54     aFont.os2_winascent_add = aFont.os2_windescent_add = 0

    55     aFont.os2_use_typo_metrics = True

    56     aFont.generate(aFont.fontname + ".otf")

    57     print(" done.")

    59 ################################################################################

    60 # Glyph variants and constructions

    61 f = newMathFont("stretchy")

    62 nvariants = 3

    64 # Draw boxes for the size variants and glues

    65 for i in range(0, nvariants):

    66     s = em * (i + 1)

    68     g = f.createChar(-1, "h%d" % i)

    69     p = g.glyphPen()

    70     p.moveTo(0, -em)

    71     p.lineTo(0, em)

    72     p.lineTo(s, em)

    73     p.lineTo(s, -em)

    74     p.closePath()

    75     g.width = s

    77     g = f.createChar(-1, "v%d" % i)

    78     p = g.glyphPen()

    79     p.moveTo(0, 0)

    80     p.lineTo(0, s)

    81     p.lineTo(2 * em, s)

    82     p.lineTo(2 * em, 0)

    83     p.closePath();

    84     g.width = 2 * em

    86 # Draw some pieces for stretchy operators

    87 s = em * nvariants

    89 g = f.createChar(-1, "left")

    90 p = g.glyphPen()

    91 p.moveTo(0, -2 * em)

    92 p.lineTo(0, 2 * em)

    93 p.lineTo(s, em)

    94 p.lineTo(s, -em)

    95 p.closePath();

    96 g.width = s

    98 g = f.createChar(-1, "right")

    99 p = g.glyphPen()

   100 p.moveTo(0, -em)

   101 p.lineTo(0, em)

   102 p.lineTo(s, 2 * em)

   103 p.lineTo(s, -2 * em)

   104 p.closePath();

   105 g.width = s

   107 g = f.createChar(-1, "hmid")

   108 p = g.glyphPen()

   109 p.moveTo(0, -em)

   110 p.lineTo(0, em)

   111 p.lineTo(s, 2 * em)

   112 p.lineTo(2 * s, em)

   113 p.lineTo(2 * s, -em)

   114 p.lineTo(s, -2 * em)

   115 p.closePath();

   116 g.width = 2 * s

   118 g = f.createChar(-1, "bottom")

   119 p = g.glyphPen()

   120 p.moveTo(0, 0)

   121 p.lineTo(0, s)

   122 p.lineTo(2 * em, s)

   123 p.lineTo(4 * em, 0)

   124 p.closePath();

   125 g.width = 4 * em

   127 g = f.createChar(-1, "top")

   128 p = g.glyphPen()

   129 p.moveTo(0, 0)

   130 p.lineTo(4 * em, 0)

   131 p.lineTo(2 * em, -s)

   132 p.lineTo(0, -s)

   133 p.closePath();

   134 g.width = 4 * em

   136 g = f.createChar(-1, "vmid")

   137 p = g.glyphPen()

   138 p.moveTo(0, s)

   139 p.lineTo(2 * em, s)

   140 p.lineTo(4 * em, 0)

   141 p.lineTo(2 * em, -s)

   142 p.lineTo(0, -s)

   143 p.closePath();

   144 g.width = 3 * em

   146 # Create small rectangle of various size for some exotic arrows that are

   147 # unlikely to be stretchable with standard fonts.

   148 hstretchy = [

   149     0x219C, # leftwards wave arrow

   150     0x219D, # rightwards wave arrow

   151     0x219E, # leftwards two headed arrow

   152     0x21A0, # rightwards two headed arrow

   153     0x21A2  # leftwards arrow with tail

   154 ]

   155 vstretchy = [

   156     0x219F, # upwards two headed arrow

   157     0x21A1, # downwards two headed arrow

   158     0x21A5, # upwards arrow from bar

   159     0x21A7, # downwards arrow from bar

   160     0x21A8  # up down arrow with base

   161 ]

   162 for i in range(0, 1 + nvariants + 1):

   163     s = (i + 1) * em/10

   165     g = f.createChar(hstretchy[i])

   166     p = g.glyphPen()

   167     p.moveTo(0, -em/10)

   168     p.lineTo(0, em/10)

   169     p.lineTo(s, em/10)

   170     p.lineTo(s, -em/10)

   171     p.closePath()

   172     g.width = s

   174     g = f.createChar(vstretchy[i])

   175     p = g.glyphPen()

   176     p.moveTo(0, 0)

   177     p.lineTo(0, s)

   178     p.lineTo(2 * em/10, s)

   179     p.lineTo(2 * em/10, 0)

   180     p.closePath();

   181     g.width = 2 * em/10

   183 # hstretchy[0] and vstretchy[0] have all the variants and the components. The others only have one of them.

   184 s = em * nvariants

   186 f[hstretchy[0]].horizontalVariants = "uni219C h0 h1 h2"

   187 f[hstretchy[0]].horizontalComponents = (("left", False, 0, 0, s), \

   188 ("h2", True, 0, 0, s), ("hmid", False, 0, 0, 2 * s), ("h2", True, 0, 0, s), \

   189 ("right", False, 0, 0, s))

   191 f[hstretchy[1]].horizontalVariants = "uni219D h0"

   192 f[hstretchy[2]].horizontalVariants = "uni219E h1"

   193 f[hstretchy[3]].horizontalVariants = "uni21A0 h2"

   194 f[hstretchy[4]].horizontalVariants = "uni21A2 h2"

   195 f[hstretchy[4]].horizontalComponents = f[hstretchy[0]].horizontalComponents

   197 f[vstretchy[0]].verticalVariants = "uni219F v0 v1 v2"

   198 f[vstretchy[0]].verticalComponents = (("bottom", False, 0, 0, s), \

   199 ("v2", True, 0, 0, s), ("vmid", False, 0, 0, 2 * s), ("v2", True, 0, 0, s), \

   200 ("top", False, 0, 0, s))

   202 f[vstretchy[1]].verticalVariants = "uni21A1 v0"

   203 f[vstretchy[2]].verticalVariants = "uni21A5 v1"

   204 f[vstretchy[3]].verticalVariants = "uni21A7 v2"

   205 f[vstretchy[4]].verticalVariants = "uni21A8"

   206 f[vstretchy[4]].verticalComponents = f[vstretchy[0]].verticalComponents

   208 ################################################################################

   209 # Testing DisplayOperatorMinHeight

   210 f.math.DisplayOperatorMinHeight =  8 * em

   211 largeop = [0x2A1B, 0x2A1C] # integral with overbar/underbar

   213 # Draw boxes of size 1, 2, 7, 8, 9em.

   214 for i in [1, 2, 7, 8, 9]:

   215     s = em * i

   216     if i == 1 or i == 2:

   217         g = f.createChar(largeop[i-1])

   218     else:

   219         g = f.createChar(-1, "L%d" % i)

   220     p = g.glyphPen()

   221     p.moveTo(0, 0)

   222     p.lineTo(0, s)

   223     p.lineTo(s, s)

   224     p.lineTo(s, 0)

   225     p.closePath();

   226     g.width = s

   228 f[largeop[0]].verticalVariants = "uni2A1B L7 L8 L9"

   229 f[largeop[1]].verticalVariants = "uni2A1C L8"

   231 saveMathFont(f)

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