Updated some fonts and added python script to create plist files.
This commit is contained in:
Michael Griebling
205
Sources/SwiftMath/mathFonts.bundle/math_table_to_plist.py
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205
Sources/SwiftMath/mathFonts.bundle/math_table_to_plist.py
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#!/usr/local/bin/python3
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import plistlib
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import sys
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from fontTools.ttLib import TTFont
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def usage(code):
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print('Usage math_table_to_plist.py <fontfile> <plistfile>')
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sys.exit(code)
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def process_font(font_file, out_file):
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font = TTFont(font_file)
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math_table = font['MATH'].table
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constants = get_constants(math_table)
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italic_c = get_italic_correction(math_table)
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v_variants = get_v_variants(math_table)
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h_variants = get_h_variants(math_table)
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assembly = get_v_assembly(math_table)
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accents = get_accent_attachments(math_table)
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pl = {
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"version" : "1.3",
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"constants": constants,
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"v_variants" : v_variants,
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"h_variants" : h_variants,
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"italic" : italic_c,
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"accents" : accents,
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"v_assembly" : assembly }
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ofile = open(out_file, 'w+b')
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plistlib.dump(pl, ofile)
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ofile.close()
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def get_constants(math_table):
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constants = math_table.MathConstants
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if constants is None:
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raise 'Cannot find MathConstants in MATH table'
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int_consts = [ 'ScriptPercentScaleDown',
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'ScriptScriptPercentScaleDown',
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'DelimitedSubFormulaMinHeight',
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'DisplayOperatorMinHeight',
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'RadicalDegreeBottomRaisePercent']
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consts = { c : getattr(constants, c) for c in int_consts }
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record_consts = [ 'MathLeading',
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'AxisHeight',
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'AccentBaseHeight',
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'FlattenedAccentBaseHeight',
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'SubscriptShiftDown',
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'SubscriptTopMax',
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'SubscriptBaselineDropMin',
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'SuperscriptShiftUp',
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'SuperscriptShiftUpCramped',
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'SuperscriptBottomMin',
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'SuperscriptBaselineDropMax',
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'SubSuperscriptGapMin',
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'SuperscriptBottomMaxWithSubscript',
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'SpaceAfterScript',
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'UpperLimitGapMin',
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'UpperLimitBaselineRiseMin',
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'LowerLimitGapMin',
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'LowerLimitBaselineDropMin',
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'StackTopShiftUp',
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'StackTopDisplayStyleShiftUp',
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'StackBottomShiftDown',
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'StackBottomDisplayStyleShiftDown',
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'StackGapMin',
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'StackDisplayStyleGapMin',
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'StretchStackTopShiftUp',
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'StretchStackBottomShiftDown',
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'StretchStackGapAboveMin',
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'StretchStackGapBelowMin',
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'FractionNumeratorShiftUp',
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'FractionNumeratorDisplayStyleShiftUp',
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'FractionDenominatorShiftDown',
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'FractionDenominatorDisplayStyleShiftDown',
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'FractionNumeratorGapMin',
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'FractionNumDisplayStyleGapMin',
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'FractionRuleThickness',
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'FractionDenominatorGapMin',
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'FractionDenomDisplayStyleGapMin',
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'SkewedFractionHorizontalGap',
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'SkewedFractionVerticalGap',
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'OverbarVerticalGap',
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'OverbarRuleThickness',
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'OverbarExtraAscender',
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'UnderbarVerticalGap',
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'UnderbarRuleThickness',
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'UnderbarExtraDescender',
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'RadicalVerticalGap',
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'RadicalDisplayStyleVerticalGap',
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'RadicalRuleThickness',
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'RadicalExtraAscender',
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'RadicalKernBeforeDegree',
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'RadicalKernAfterDegree',
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]
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consts_2 = { c : getattr(constants, c).Value for c in record_consts }
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consts.update(consts_2)
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variants = math_table.MathVariants
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consts['MinConnectorOverlap'] = variants.MinConnectorOverlap
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return consts
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def get_italic_correction(math_table):
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glyph_info = math_table.MathGlyphInfo
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if glyph_info is None:
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raise "Cannot find MathGlyphInfo in MATH table."
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italic = glyph_info.MathItalicsCorrectionInfo
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if italic is None:
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raise "Cannot find Italic Correction in GlyphInfo"
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glyphs = italic.Coverage.glyphs
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count = italic.ItalicsCorrectionCount
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records = italic.ItalicsCorrection
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italic_dict = {}
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for i in range(count):
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name = glyphs[i]
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record = records[i]
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if record.DeviceTable is not None:
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raise "Don't know how to process device table for italic correction."
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italic_dict[name] = record.Value
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return italic_dict
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def get_accent_attachments(math_table):
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glyph_info = math_table.MathGlyphInfo
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if glyph_info is None:
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raise "Cannot find MathGlyphInfo in MATH table."
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attach = glyph_info.MathTopAccentAttachment
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if attach is None:
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raise "Cannot find Top Accent Attachment in GlyphInfo"
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glyphs = attach.TopAccentCoverage.glyphs
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count = attach.TopAccentAttachmentCount
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records = attach.TopAccentAttachment
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attach_dict = {}
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for i in range(count):
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name = glyphs[i]
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record = records[i]
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if record.DeviceTable is not None:
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raise "Don't know how to process device table for accent attachment."
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attach_dict[name] = record.Value
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return attach_dict
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def get_v_variants(math_table):
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variants = math_table.MathVariants
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vglyphs = variants.VertGlyphCoverage.glyphs
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vconstruction = variants.VertGlyphConstruction
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count = variants.VertGlyphCount
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variant_dict = {}
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for i in range(count):
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name = vglyphs[i]
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record = vconstruction[i]
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glyph_variants = [x.VariantGlyph for x in
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record.MathGlyphVariantRecord]
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variant_dict[name] = glyph_variants
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return variant_dict
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def get_h_variants(math_table):
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variants = math_table.MathVariants
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hglyphs = variants.HorizGlyphCoverage.glyphs
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hconstruction = variants.HorizGlyphConstruction
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count = variants.HorizGlyphCount
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variant_dict = {}
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for i in range(count):
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name = hglyphs[i]
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record = hconstruction[i]
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glyph_variants = [x.VariantGlyph for x in
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record.MathGlyphVariantRecord]
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variant_dict[name] = glyph_variants
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return variant_dict
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def get_v_assembly(math_table):
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variants = math_table.MathVariants
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vglyphs = variants.VertGlyphCoverage.glyphs
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vconstruction = variants.VertGlyphConstruction
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count = variants.VertGlyphCount
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assembly_dict = {}
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for i in range(count):
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name = vglyphs[i]
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record = vconstruction[i]
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assembly = record.GlyphAssembly
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if assembly is not None:
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# There is an assembly for this glyph
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italic = assembly.ItalicsCorrection.Value
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parts = [part_dict(part) for part in assembly.PartRecords]
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assembly_dict[name] = {
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"italic" : assembly.ItalicsCorrection.Value,
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"parts" : parts }
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return assembly_dict
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def part_dict(part):
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return {
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"glyph": part.glyph,
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"startConnector" : part.StartConnectorLength,
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"endConnector" : part.EndConnectorLength,
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"advance" : part.FullAdvance,
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"extender" : (part.PartFlags == 1) }
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def main():
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if len(sys.argv) != 3:
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usage(1)
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font_file = sys.argv[1]
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plist_file = sys.argv[2]
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process_font(font_file, plist_file)
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if __name__ == '__main__':
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main()
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