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-rw-r--r--layout/reftests/fonts/gsubtest/makegsubfonts.py515
1 files changed, 515 insertions, 0 deletions
diff --git a/layout/reftests/fonts/gsubtest/makegsubfonts.py b/layout/reftests/fonts/gsubtest/makegsubfonts.py
new file mode 100644
index 0000000000..8cd6476d97
--- /dev/null
+++ b/layout/reftests/fonts/gsubtest/makegsubfonts.py
@@ -0,0 +1,515 @@
+import os
+import textwrap
+from xml.etree import ElementTree
+from fontTools.ttLib import TTFont, newTable
+from fontTools.misc.psCharStrings import T2CharString
+from fontTools.ttLib.tables.otTables import (
+ GSUB,
+ ScriptList,
+ ScriptRecord,
+ Script,
+ DefaultLangSys,
+ FeatureList,
+ FeatureRecord,
+ Feature,
+ LookupList,
+ Lookup,
+ AlternateSubst,
+ SingleSubst,
+)
+
+# paths
+directory = os.path.dirname(__file__)
+shellSourcePath = os.path.join(directory, "gsubtest-shell.ttx")
+shellTempPath = os.path.join(directory, "gsubtest-shell.otf")
+featureList = os.path.join(directory, "gsubtest-features.txt")
+javascriptData = os.path.join(directory, "gsubtest-features.js")
+outputPath = os.path.join(os.path.dirname(directory), "gsubtest-lookup%d")
+
+baseCodepoint = 0xE000
+
+# -------
+# Features
+# -------
+
+f = open(featureList, "rb")
+text = f.read()
+f.close()
+mapping = []
+for line in text.splitlines():
+ line = line.strip()
+ if not line:
+ continue
+ if line.startswith("#"):
+ continue
+ # parse
+ values = line.split("\t")
+ tag = values.pop(0)
+ mapping.append(tag)
+
+# --------
+# Outlines
+# --------
+
+
+def addGlyphToCFF(
+ glyphName=None,
+ program=None,
+ private=None,
+ globalSubrs=None,
+ charStringsIndex=None,
+ topDict=None,
+ charStrings=None,
+):
+ charString = T2CharString(program=program, private=private, globalSubrs=globalSubrs)
+ charStringsIndex.append(charString)
+ glyphID = len(topDict.charset)
+ charStrings.charStrings[glyphName] = glyphID
+ topDict.charset.append(glyphName)
+
+
+def makeLookup1():
+ # make a variation of the shell TTX data
+ f = open(shellSourcePath)
+ ttxData = f.read()
+ f.close()
+ ttxData = ttxData.replace("__familyName__", "gsubtest-lookup1")
+ tempShellSourcePath = shellSourcePath + ".temp"
+ f = open(tempShellSourcePath, "wb")
+ f.write(ttxData)
+ f.close()
+
+ # compile the shell
+ shell = TTFont(sfntVersion="OTTO")
+ shell.importXML(tempShellSourcePath)
+ shell.save(shellTempPath)
+ os.remove(tempShellSourcePath)
+
+ # load the shell
+ shell = TTFont(shellTempPath)
+
+ # grab the PASS and FAIL data
+ hmtx = shell["hmtx"]
+ glyphSet = shell.getGlyphSet()
+
+ failGlyph = glyphSet["F"]
+ failGlyph.decompile()
+ failGlyphProgram = list(failGlyph.program)
+ failGlyphMetrics = hmtx["F"]
+
+ passGlyph = glyphSet["P"]
+ passGlyph.decompile()
+ passGlyphProgram = list(passGlyph.program)
+ passGlyphMetrics = hmtx["P"]
+
+ # grab some tables
+ hmtx = shell["hmtx"]
+ cmap = shell["cmap"]
+
+ # start the glyph order
+ existingGlyphs = [".notdef", "space", "F", "P"]
+ glyphOrder = list(existingGlyphs)
+
+ # start the CFF
+ cff = shell["CFF "].cff
+ globalSubrs = cff.GlobalSubrs
+ topDict = cff.topDictIndex[0]
+ topDict.charset = existingGlyphs
+ private = topDict.Private
+ charStrings = topDict.CharStrings
+ charStringsIndex = charStrings.charStringsIndex
+
+ features = sorted(mapping)
+
+ # build the outline, hmtx and cmap data
+ cp = baseCodepoint
+ for index, tag in enumerate(features):
+ # tag.pass
+ glyphName = "%s.pass" % tag
+ glyphOrder.append(glyphName)
+ addGlyphToCFF(
+ glyphName=glyphName,
+ program=passGlyphProgram,
+ private=private,
+ globalSubrs=globalSubrs,
+ charStringsIndex=charStringsIndex,
+ topDict=topDict,
+ charStrings=charStrings,
+ )
+ hmtx[glyphName] = passGlyphMetrics
+
+ for table in cmap.tables:
+ if table.format == 4:
+ table.cmap[cp] = glyphName
+ else:
+ raise NotImplementedError(
+ "Unsupported cmap table format: %d" % table.format
+ )
+ cp += 1
+
+ # tag.fail
+ glyphName = "%s.fail" % tag
+ glyphOrder.append(glyphName)
+ addGlyphToCFF(
+ glyphName=glyphName,
+ program=failGlyphProgram,
+ private=private,
+ globalSubrs=globalSubrs,
+ charStringsIndex=charStringsIndex,
+ topDict=topDict,
+ charStrings=charStrings,
+ )
+ hmtx[glyphName] = failGlyphMetrics
+
+ for table in cmap.tables:
+ if table.format == 4:
+ table.cmap[cp] = glyphName
+ else:
+ raise NotImplementedError(
+ "Unsupported cmap table format: %d" % table.format
+ )
+
+ # bump this up so that the sequence is the same as the lookup 3 font
+ cp += 3
+
+ # set the glyph order
+ shell.setGlyphOrder(glyphOrder)
+
+ # start the GSUB
+ shell["GSUB"] = newTable("GSUB")
+ gsub = shell["GSUB"].table = GSUB()
+ gsub.Version = 1.0
+
+ # make a list of all the features we will make
+ featureCount = len(features)
+
+ # set up the script list
+ scriptList = gsub.ScriptList = ScriptList()
+ scriptList.ScriptCount = 1
+ scriptList.ScriptRecord = []
+ scriptRecord = ScriptRecord()
+ scriptList.ScriptRecord.append(scriptRecord)
+ scriptRecord.ScriptTag = "DFLT"
+ script = scriptRecord.Script = Script()
+ defaultLangSys = script.DefaultLangSys = DefaultLangSys()
+ defaultLangSys.FeatureCount = featureCount
+ defaultLangSys.FeatureIndex = range(defaultLangSys.FeatureCount)
+ defaultLangSys.ReqFeatureIndex = 65535
+ defaultLangSys.LookupOrder = None
+ script.LangSysCount = 0
+ script.LangSysRecord = []
+
+ # set up the feature list
+ featureList = gsub.FeatureList = FeatureList()
+ featureList.FeatureCount = featureCount
+ featureList.FeatureRecord = []
+ for index, tag in enumerate(features):
+ # feature record
+ featureRecord = FeatureRecord()
+ featureRecord.FeatureTag = tag
+ feature = featureRecord.Feature = Feature()
+ featureList.FeatureRecord.append(featureRecord)
+ # feature
+ feature.FeatureParams = None
+ feature.LookupCount = 1
+ feature.LookupListIndex = [index]
+
+ # write the lookups
+ lookupList = gsub.LookupList = LookupList()
+ lookupList.LookupCount = featureCount
+ lookupList.Lookup = []
+ for tag in features:
+ # lookup
+ lookup = Lookup()
+ lookup.LookupType = 1
+ lookup.LookupFlag = 0
+ lookup.SubTableCount = 1
+ lookup.SubTable = []
+ lookupList.Lookup.append(lookup)
+ # subtable
+ subtable = SingleSubst()
+ subtable.Format = 2
+ subtable.LookupType = 1
+ subtable.mapping = {
+ "%s.pass" % tag: "%s.fail" % tag,
+ "%s.fail" % tag: "%s.pass" % tag,
+ }
+ lookup.SubTable.append(subtable)
+
+ path = outputPath % 1 + ".otf"
+ if os.path.exists(path):
+ os.remove(path)
+ shell.save(path)
+
+ # get rid of the shell
+ if os.path.exists(shellTempPath):
+ os.remove(shellTempPath)
+
+
+def makeLookup3():
+ # make a variation of the shell TTX data
+ f = open(shellSourcePath)
+ ttxData = f.read()
+ f.close()
+ ttxData = ttxData.replace("__familyName__", "gsubtest-lookup3")
+ tempShellSourcePath = shellSourcePath + ".temp"
+ f = open(tempShellSourcePath, "wb")
+ f.write(ttxData)
+ f.close()
+
+ # compile the shell
+ shell = TTFont(sfntVersion="OTTO")
+ shell.importXML(tempShellSourcePath)
+ shell.save(shellTempPath)
+ os.remove(tempShellSourcePath)
+
+ # load the shell
+ shell = TTFont(shellTempPath)
+
+ # grab the PASS and FAIL data
+ hmtx = shell["hmtx"]
+ glyphSet = shell.getGlyphSet()
+
+ failGlyph = glyphSet["F"]
+ failGlyph.decompile()
+ failGlyphProgram = list(failGlyph.program)
+ failGlyphMetrics = hmtx["F"]
+
+ passGlyph = glyphSet["P"]
+ passGlyph.decompile()
+ passGlyphProgram = list(passGlyph.program)
+ passGlyphMetrics = hmtx["P"]
+
+ # grab some tables
+ hmtx = shell["hmtx"]
+ cmap = shell["cmap"]
+
+ # start the glyph order
+ existingGlyphs = [".notdef", "space", "F", "P"]
+ glyphOrder = list(existingGlyphs)
+
+ # start the CFF
+ cff = shell["CFF "].cff
+ globalSubrs = cff.GlobalSubrs
+ topDict = cff.topDictIndex[0]
+ topDict.charset = existingGlyphs
+ private = topDict.Private
+ charStrings = topDict.CharStrings
+ charStringsIndex = charStrings.charStringsIndex
+
+ features = sorted(mapping)
+
+ # build the outline, hmtx and cmap data
+ cp = baseCodepoint
+ for index, tag in enumerate(features):
+ # tag.pass
+ glyphName = "%s.pass" % tag
+ glyphOrder.append(glyphName)
+ addGlyphToCFF(
+ glyphName=glyphName,
+ program=passGlyphProgram,
+ private=private,
+ globalSubrs=globalSubrs,
+ charStringsIndex=charStringsIndex,
+ topDict=topDict,
+ charStrings=charStrings,
+ )
+ hmtx[glyphName] = passGlyphMetrics
+
+ # tag.fail
+ glyphName = "%s.fail" % tag
+ glyphOrder.append(glyphName)
+ addGlyphToCFF(
+ glyphName=glyphName,
+ program=failGlyphProgram,
+ private=private,
+ globalSubrs=globalSubrs,
+ charStringsIndex=charStringsIndex,
+ topDict=topDict,
+ charStrings=charStrings,
+ )
+ hmtx[glyphName] = failGlyphMetrics
+
+ # tag.default
+ glyphName = "%s.default" % tag
+ glyphOrder.append(glyphName)
+ addGlyphToCFF(
+ glyphName=glyphName,
+ program=passGlyphProgram,
+ private=private,
+ globalSubrs=globalSubrs,
+ charStringsIndex=charStringsIndex,
+ topDict=topDict,
+ charStrings=charStrings,
+ )
+ hmtx[glyphName] = passGlyphMetrics
+
+ for table in cmap.tables:
+ if table.format == 4:
+ table.cmap[cp] = glyphName
+ else:
+ raise NotImplementedError(
+ "Unsupported cmap table format: %d" % table.format
+ )
+ cp += 1
+
+ # tag.alt1,2,3
+ for i in range(1, 4):
+ glyphName = "%s.alt%d" % (tag, i)
+ glyphOrder.append(glyphName)
+ addGlyphToCFF(
+ glyphName=glyphName,
+ program=failGlyphProgram,
+ private=private,
+ globalSubrs=globalSubrs,
+ charStringsIndex=charStringsIndex,
+ topDict=topDict,
+ charStrings=charStrings,
+ )
+ hmtx[glyphName] = failGlyphMetrics
+ for table in cmap.tables:
+ if table.format == 4:
+ table.cmap[cp] = glyphName
+ else:
+ raise NotImplementedError(
+ "Unsupported cmap table format: %d" % table.format
+ )
+ cp += 1
+
+ # set the glyph order
+ shell.setGlyphOrder(glyphOrder)
+
+ # start the GSUB
+ shell["GSUB"] = newTable("GSUB")
+ gsub = shell["GSUB"].table = GSUB()
+ gsub.Version = 1.0
+
+ # make a list of all the features we will make
+ featureCount = len(features)
+
+ # set up the script list
+ scriptList = gsub.ScriptList = ScriptList()
+ scriptList.ScriptCount = 1
+ scriptList.ScriptRecord = []
+ scriptRecord = ScriptRecord()
+ scriptList.ScriptRecord.append(scriptRecord)
+ scriptRecord.ScriptTag = "DFLT"
+ script = scriptRecord.Script = Script()
+ defaultLangSys = script.DefaultLangSys = DefaultLangSys()
+ defaultLangSys.FeatureCount = featureCount
+ defaultLangSys.FeatureIndex = range(defaultLangSys.FeatureCount)
+ defaultLangSys.ReqFeatureIndex = 65535
+ defaultLangSys.LookupOrder = None
+ script.LangSysCount = 0
+ script.LangSysRecord = []
+
+ # set up the feature list
+ featureList = gsub.FeatureList = FeatureList()
+ featureList.FeatureCount = featureCount
+ featureList.FeatureRecord = []
+ for index, tag in enumerate(features):
+ # feature record
+ featureRecord = FeatureRecord()
+ featureRecord.FeatureTag = tag
+ feature = featureRecord.Feature = Feature()
+ featureList.FeatureRecord.append(featureRecord)
+ # feature
+ feature.FeatureParams = None
+ feature.LookupCount = 1
+ feature.LookupListIndex = [index]
+
+ # write the lookups
+ lookupList = gsub.LookupList = LookupList()
+ lookupList.LookupCount = featureCount
+ lookupList.Lookup = []
+ for tag in features:
+ # lookup
+ lookup = Lookup()
+ lookup.LookupType = 3
+ lookup.LookupFlag = 0
+ lookup.SubTableCount = 1
+ lookup.SubTable = []
+ lookupList.Lookup.append(lookup)
+ # subtable
+ subtable = AlternateSubst()
+ subtable.Format = 1
+ subtable.LookupType = 3
+ subtable.alternates = {
+ "%s.default" % tag: ["%s.fail" % tag, "%s.fail" % tag, "%s.fail" % tag],
+ "%s.alt1" % tag: ["%s.pass" % tag, "%s.fail" % tag, "%s.fail" % tag],
+ "%s.alt2" % tag: ["%s.fail" % tag, "%s.pass" % tag, "%s.fail" % tag],
+ "%s.alt3" % tag: ["%s.fail" % tag, "%s.fail" % tag, "%s.pass" % tag],
+ }
+ lookup.SubTable.append(subtable)
+
+ path = outputPath % 3 + ".otf"
+ if os.path.exists(path):
+ os.remove(path)
+ shell.save(path)
+
+ # get rid of the shell
+ if os.path.exists(shellTempPath):
+ os.remove(shellTempPath)
+
+
+def makeJavascriptData():
+ features = sorted(mapping)
+ outStr = []
+
+ outStr.append("")
+ outStr.append("/* This file is autogenerated by makegsubfonts.py */")
+ outStr.append("")
+ outStr.append("/* ")
+ outStr.append(" Features defined in gsubtest fonts with associated base")
+ outStr.append(" codepoints for each feature:")
+ outStr.append("")
+ outStr.append(" cp = codepoint for feature featX")
+ outStr.append("")
+ outStr.append(" cp default PASS")
+ outStr.append(" cp featX=1 FAIL")
+ outStr.append(" cp featX=2 FAIL")
+ outStr.append("")
+ outStr.append(" cp+1 default FAIL")
+ outStr.append(" cp+1 featX=1 PASS")
+ outStr.append(" cp+1 featX=2 FAIL")
+ outStr.append("")
+ outStr.append(" cp+2 default FAIL")
+ outStr.append(" cp+2 featX=1 FAIL")
+ outStr.append(" cp+2 featX=2 PASS")
+ outStr.append("")
+ outStr.append("*/")
+ outStr.append("")
+ outStr.append("var gFeatures = {")
+ cp = baseCodepoint
+
+ taglist = []
+ for tag in features:
+ taglist.append('"%s": 0x%x' % (tag, cp))
+ cp += 4
+
+ outStr.append(
+ textwrap.fill(", ".join(taglist), initial_indent=" ", subsequent_indent=" ")
+ )
+ outStr.append("};")
+ outStr.append("")
+
+ if os.path.exists(javascriptData):
+ os.remove(javascriptData)
+
+ f = open(javascriptData, "wb")
+ f.write("\n".join(outStr))
+ f.close()
+
+
+# build fonts
+
+print("Making lookup type 1 font...")
+makeLookup1()
+
+print("Making lookup type 3 font...")
+makeLookup3()
+
+# output javascript data
+
+print("Making javascript data file...")
+makeJavascriptData()
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-16 16:52:23 +0000