//------------------------------------------------------- //experiment internal void LoadOpenFontLayoutInfo(GDEF gdefTable, GSUB gsubTable, GPOS gposTable, BASE baseTable, COLR colrTable, CPAL cpalTable) { //*** this.GDEFTable = gdefTable; this.GSUBTable = gsubTable; this.GPOSTable = gposTable; this.BaseTable = baseTable; this.COLRTable = colrTable; this.CPALTable = cpalTable; //--------------------------- //1. fill glyph definition if (gdefTable != null) { gdefTable.FillGlyphData(this.Glyphs); //if (this.Glyphs != null) //{ //} //else if (_cffTable != null) //{ // //post script outline // //TODO: fill gdef for cff font //} } }
private void RebuildTables() { _lookupTables.Clear(); // check if this lang has GSUB gsubTable = _typeface.GSUBTable; ScriptTable scriptTable = gsubTable.ScriptList[_language]; if (scriptTable == null) { return; } ScriptTable.LangSysTable selectedLang = null; if (scriptTable.langSysTables != null && scriptTable.langSysTables.Length > 0) { // TODO: review here selectedLang = scriptTable.langSysTables[0]; } else { selectedLang = scriptTable.defaultLang; } if (selectedLang.HasRequireFeature) { // TODO: review here } if (selectedLang.featureIndexList == null) { return; } // Enumerate features we want and add the corresponding lookup tables foreach (int featureIndex in selectedLang.featureIndexList) { FeatureList.FeatureTable feature = gsubTable.FeatureList.featureTables[featureIndex]; bool featureIsNeeded = false; switch (feature.TagName) { case "ccmp": // glyph composition/decomposition // this version we implement ccmp featureIsNeeded = EnableComposition; break; case "liga": // Standard Ligatures --enable by default featureIsNeeded = EnableLigation; break; } if (featureIsNeeded) { foreach (ushort lookupIndex in feature.LookupListIndices) { _lookupTables.Add(gsubTable.LookupList[lookupIndex]); } } } }
internal PreviewFontInfo ReadPreviewFontInfo(TableEntryCollection tables, BinaryReader input) { var rd = new EntriesReaderHelper(tables, input); NameEntry nameEntry = rd.Read(new NameEntry()); OS2Table os2Table = rd.Read(new OS2Table()); //for preview, read ONLY script list from gsub and gpos (set OnlyScriptList). Meta metaTable = rd.Read(new Meta()); GSUB gsub = rd.Read(new GSUB() { OnlyScriptList = true }); GPOS gpos = rd.Read(new GPOS() { OnlyScriptList = true }); Cmap cmap = rd.Read(new Cmap()); //gsub and gpos contains actual script_list that are in the typeface Languages langs = new Languages(); langs.Update(os2Table, metaTable, cmap, gsub, gpos); return(new PreviewFontInfo( nameEntry, os2Table, langs)); }
//------------------------------------------------------- //experiment internal void LoadOpenFontLayoutInfo(GDEF gdefTable, GSUB gsubTable, GPOS gposTable, BASE baseTable) { //*** this.GDEFTable = gdefTable; this.GSUBTable = gsubTable; this.GPOSTable = gposTable; this.BaseTable = baseTable; //--------------------------- //1. fill glyph definition if (gdefTable != null) { gdefTable.FillGlyphData(this.Glyphs); } }
internal PreviewFontInfo ReadPreviewFontInfo(TableEntryCollection tables, BinaryReader input) { var rd = new EntriesReaderHelper(tables, input); NameEntry nameEntry = rd.Read(new NameEntry()); OS2Table os2Table = rd.Read(new OS2Table()); //for preview, read ONLY script list from gsub and gpos (set OnlyScriptList). Meta metaTable = rd.Read(new Meta()); GSUB gsub = rd.Read(new GSUB() { OnlyScriptList = true }); GPOS gpos = rd.Read(new GPOS() { OnlyScriptList = true }); //gsub and gpos contains actual script_list that are in the typeface Languages langs = new Languages(); langs.Update(os2Table, metaTable, gsub, gpos); return(new PreviewFontInfo( nameEntry.FontName, nameEntry.FontSubFamily, nameEntry.TypographicFamilyName, nameEntry.TypographyicSubfamilyName, os2Table.usWeightClass, langs, Extensions.TypefaceExtensions.TranslatedOS2FontStyle(os2Table)) { PostScriptName = nameEntry.PostScriptName, UniqueFontIden = nameEntry.UniqueFontIden, VersionString = nameEntry.VersionString }); }
internal Typeface ReadTableEntryCollection(TableEntryCollection tables, BinaryReader input) { OS2Table os2Table = ReadTableIfExists(tables, input, new OS2Table()); NameEntry nameEntry = ReadTableIfExists(tables, input, new NameEntry()); Head header = ReadTableIfExists(tables, input, new Head()); MaxProfile maximumProfile = ReadTableIfExists(tables, input, new MaxProfile()); HorizontalHeader horizontalHeader = ReadTableIfExists(tables, input, new HorizontalHeader()); HorizontalMetrics horizontalMetrics = ReadTableIfExists(tables, input, new HorizontalMetrics(horizontalHeader.HorizontalMetricsCount, maximumProfile.GlyphCount)); //--- PostTable postTable = ReadTableIfExists(tables, input, new PostTable()); CFFTable ccf = ReadTableIfExists(tables, input, new CFFTable()); //-------------- Cmap cmaps = ReadTableIfExists(tables, input, new Cmap()); GlyphLocations glyphLocations = ReadTableIfExists(tables, input, new GlyphLocations(maximumProfile.GlyphCount, header.WideGlyphLocations)); Glyf glyf = ReadTableIfExists(tables, input, new Glyf(glyphLocations)); //-------------- Gasp gaspTable = ReadTableIfExists(tables, input, new Gasp()); VerticalDeviceMetrics vdmx = ReadTableIfExists(tables, input, new VerticalDeviceMetrics()); //-------------- Kern kern = ReadTableIfExists(tables, input, new Kern()); //-------------- //advanced typography GDEF gdef = ReadTableIfExists(tables, input, new GDEF()); GSUB gsub = ReadTableIfExists(tables, input, new GSUB()); GPOS gpos = ReadTableIfExists(tables, input, new GPOS()); BASE baseTable = ReadTableIfExists(tables, input, new BASE()); COLR colr = ReadTableIfExists(tables, input, new COLR()); CPAL cpal = ReadTableIfExists(tables, input, new CPAL()); VerticalHeader vhea = ReadTableIfExists(tables, input, new VerticalHeader()); if (vhea != null) { VerticalMetrics vmtx = ReadTableIfExists(tables, input, new VerticalMetrics(vhea.NumOfLongVerMetrics)); } //test math table MathTable mathtable = ReadTableIfExists(tables, input, new MathTable()); EBLCTable fontBmpTable = ReadTableIfExists(tables, input, new EBLCTable()); //--------------------------------------------- //about truetype instruction init //--------------------------------------------- Typeface typeface = null; bool isPostScriptOutline = false; if (glyf == null) { //check if this is cff table ? if (ccf == null) { //TODO: review here throw new NotSupportedException(); } //... //PostScript outline font isPostScriptOutline = true; typeface = new Typeface( nameEntry, header.Bounds, header.UnitsPerEm, ccf, horizontalMetrics, os2Table); } else { typeface = new Typeface( nameEntry, header.Bounds, header.UnitsPerEm, glyf.Glyphs, horizontalMetrics, os2Table); } //---------------------------- typeface.CmapTable = cmaps; typeface.KernTable = kern; typeface.GaspTable = gaspTable; typeface.MaxProfile = maximumProfile; typeface.HheaTable = horizontalHeader; //---------------------------- if (!isPostScriptOutline) { FpgmTable fpgmTable = ReadTableIfExists(tables, input, new FpgmTable()); //control values table CvtTable cvtTable = ReadTableIfExists(tables, input, new CvtTable()); if (cvtTable != null) { typeface.ControlValues = cvtTable._controlValues; } if (fpgmTable != null) { typeface.FpgmProgramBuffer = fpgmTable._programBuffer; } PrepTable propProgramTable = ReadTableIfExists(tables, input, new PrepTable()); if (propProgramTable != null) { typeface.PrepProgramBuffer = propProgramTable._programBuffer; } } //------------------------- typeface.LoadOpenFontLayoutInfo( gdef, gsub, gpos, baseTable, colr, cpal); //------------ //test { SvgTable svgTable = ReadTableIfExists(tables, input, new SvgTable()); if (svgTable != null) { typeface._svgTable = svgTable; } } typeface.PostTable = postTable; if (mathtable != null) { var mathGlyphLoader = new MathGlyphLoader(); mathGlyphLoader.LoadMathGlyph(typeface, mathtable); } #if DEBUG //test //int found = typeface.GetGlyphIndexByName("Uacute"); if (typeface.IsCffFont) { //optional typeface.UpdateAllCffGlyphBounds(); } #endif return(typeface); }
public TtfTypeface Read(Stream stream, ReadFlags readFlags = ReadFlags.Full) { var little = BitConverter.IsLittleEndian; using (var input = new ByteOrderSwappingBinaryReader(stream)) { ushort majorVersion = input.ReadUInt16(); ushort minorVersion = input.ReadUInt16(); ushort tableCount = input.ReadUInt16(); ushort searchRange = input.ReadUInt16(); ushort entrySelector = input.ReadUInt16(); ushort rangeShift = input.ReadUInt16(); var tables = new TableEntryCollection(); for (int i = 0; i < tableCount; i++) { tables.AddEntry(new UnreadTableEntry(ReadTableHeader(input))); } //------------------------------------------------------------------ OS2Table os2Table = ReadTableIfExists(tables, input, new OS2Table()); NameEntry nameEntry = ReadTableIfExists(tables, input, new NameEntry()); Head header = ReadTableIfExists(tables, input, new Head()); MaxProfile maximumProfile = ReadTableIfExists(tables, input, new MaxProfile()); HorizontalHeader horizontalHeader = ReadTableIfExists(tables, input, new HorizontalHeader()); HorizontalMetrics horizontalMetrics = ReadTableIfExists(tables, input, new HorizontalMetrics(horizontalHeader.HorizontalMetricsCount, maximumProfile.GlyphCount)); //-------------- Cmap cmaps = ReadTableIfExists(tables, input, new Cmap()); GlyphLocations glyphLocations = ReadTableIfExists(tables, input, new GlyphLocations(maximumProfile.GlyphCount, header.WideGlyphLocations)); Glyf glyf = ReadTableIfExists(tables, input, new Glyf(glyphLocations)); //-------------- Gasp gaspTable = ReadTableIfExists(tables, input, new Gasp()); VerticalDeviceMetrics vdmx = ReadTableIfExists(tables, input, new VerticalDeviceMetrics()); //-------------- PostTable postTable = ReadTableIfExists(tables, input, new PostTable()); Kern kern = ReadTableIfExists(tables, input, new Kern()); //-------------- //advanced typography GDEF gdef = ReadTableIfExists(tables, input, new GDEF()); GSUB gsub = ReadTableIfExists(tables, input, new GSUB()); GPOS gpos = ReadTableIfExists(tables, input, new GPOS()); BASE baseTable = ReadTableIfExists(tables, input, new BASE()); COLR colr = ReadTableIfExists(tables, input, new COLR()); CPAL cpal = ReadTableIfExists(tables, input, new CPAL()); VerticalHeader vhea = ReadTableIfExists(tables, input, new VerticalHeader()); if (vhea != null) { VerticalMatric vmtx = ReadTableIfExists(tables, input, new VerticalMatric(vhea.NumOfLongVerMetrics)); } EBLCTable fontBmpTable = ReadTableIfExists(tables, input, new EBLCTable()); //--------------------------------------------- //about truetype instruction init //--------------------------------------------- var typeface = new TtfTypeface( nameEntry, header.Bounds, header.UnitsPerEm, glyf.Glyphs, horizontalMetrics, os2Table); //---------------------------- typeface.CmapTable = cmaps; typeface.KernTable = kern; typeface.GaspTable = gaspTable; typeface.MaxProfile = maximumProfile; typeface.HheaTable = horizontalHeader; //---------------------------- FpgmTable fpgmTable = ReadTableIfExists(tables, input, new FpgmTable()); //control values table CvtTable cvtTable = ReadTableIfExists(tables, input, new CvtTable()); if (cvtTable != null) { typeface.ControlValues = cvtTable.controlValues; } if (fpgmTable != null) { typeface.FpgmProgramBuffer = fpgmTable.programBuffer; } PrepTable propProgramTable = ReadTableIfExists(tables, input, new PrepTable()); if (propProgramTable != null) { typeface.PrepProgramBuffer = propProgramTable.programBuffer; } //------------------------- typeface.LoadOpenFontLayoutInfo( gdef, gsub, gpos, baseTable, colr, cpal); return(typeface); } }
internal void Update(OS2Table os2Tabble, Meta meta, GSUB gsub, GPOS gpos) { //https://docs.microsoft.com/en-us/typography/opentype/spec/os2#ur //This field is used to specify the Unicode blocks or ranges encompassed by the font file in 'cmap' subtables for platform 3, //encoding ID 1 (Microsoft platform, Unicode BMP) and platform 3, //encoding ID 10 (Microsoft platform, Unicode full repertoire). //If a bit is set (1), then the Unicode ranges assigned to that bit are considered functional. //If the bit is clear (0), then the range is not considered functional. //unicode BMP (Basic Multilingual Plane),OR plane0 (see https://unicode.org/roadmaps/bmp/) //Each of the bits is treated as an independent flag and the bits can be set in any combination. //The determination of “functional” is left up to the font designer, //although character set selection should attempt to be functional by ranges if at all possible. //-------------- //Different versions of the OS/2 table were created when different Unicode versions were current, //and the initial specification for a given version defined fewer bit assignments than for later versions. //Some applications may not support all assignments for fonts that have earlier OS/2 versions. //All of the bit assignments listed above are valid for any version of the OS/2 table, //though OS/2 versions 1 and 2 were specified with some assignments that did not correspond to well-defined Unicode ranges and //that conflict with later assignments — see the details below. //If a font has a version 1 or version 2 OS/2 table with one of these bits set, //the obsolete assignment may be the intended interpretation. //Because these assignments do not correspond to well-defined ranges, //however, the implied character coverage is unclear. //Version 0: When version 0 was first specified, no bit assignments were defined. //Some applications may ignore these fields in a version 0 OS/2 table. //Version 1: //Version 1 was first specified concurrent with Unicode 1.1, //and bit assigments were defined for bits 0 to 69 only. With fonts that have a version 1 table, //some applications might recognize only bits 0 to 69. //Also, version 1 was specified with some bit assignments that did not correspond to a well-defined Unicode range: // Bit 8: “Greek Symbols and Coptic” (bit 7 was specified as “Basic Greek”) // Bit 12: “Hebrew Extended” (bit 11 was specified as “Basic Hebrew”) // Bit 14: “Arabic Extended” (bit 13 was specified as “Basic Arabic”) // Bit 27: “Georgian Extended” (bit 26 was specified as “Basic Georgian”) //These assignments were discontinued as of version 2. //In addition, versions 1 and 2 were defined with bit 53 specified as “CJK Miscellaneous”, //which also does not correspond to any well-defined Unicode range. //This assignment was discontinued as of version 3. //Version 2: //Version 2 was defined in OpenType 1.1, which was concurrent with Unicode 2.1. //At that time, bit assignments were defined for bits 0 to 69 only. //Bit assignments for version 2 were updated in OpenType 1.3, //adding assignments for bits 70 to 83 corresponding to new blocks assigned in Unicode 2.0 and Unicode 3.0. //With fonts that have a version 2 table, //some applications might recognize only those bits assigned in OpenType 1.2 or OpenType 1.3. //Also, the specification for version 2 continued to use a problematic assignment for bit 53 — //see details for version 1. This assignment was discontinued as of version 3. //Version 3: Version 3 was defined in OpenType 1.4 with assignments for bits 84 to 91 corresponding to additional //ranges in Unicode 3.2. //In addition, some already-assigned bits were extended to cover additional Unicode ranges for related characters; s //ee details in the table above. //Version 4: Version 4 was defined in OpenType 1.5 with assignments for bit 58 and bits 92 to 122 corresponding to additional ranges in Unicode 5.1. //Also, bits 8, 12, 14, 27 and 53 were re-assigned (see version 1 for previous assignments). //In addition, some already-assigned bits were extended to cover additional Unicode ranges for related characters; //see details in the table above. OS2Version = os2Tabble.version; UnicodeRange1 = os2Tabble.ulUnicodeRange1; UnicodeRange2 = os2Tabble.ulUnicodeRange2; UnicodeRange3 = os2Tabble.ulUnicodeRange3; UnicodeRange4 = os2Tabble.ulUnicodeRange4; //ULONG ulUnicodeRange1 Bits 0-31 //ULONG ulUnicodeRange2 Bits 32-63 //ULONG ulUnicodeRange3 Bits 64-95 //ULONG ulUnicodeRange4 Bits 96-127 //------- //IMPORTANT:*** //All available bits were exhausted as of Unicode 5.1. *** //The bit assignments were last updated for OS/2 version 4 in OpenType 1.5. //There are many additional ranges supported in the current version of Unicode that are not supported by these fields in the OS/2 table. // //See the 'dlng' and 'slng' tags in the 'meta' table for an alternate mechanism to declare //what scripts or languages that a font can support or is designed for. //------- if (meta != null) { SupportedLangs = meta.SupportedLanguageTags; DesignLangs = meta.DesignLanguageTags; } //---- //gsub and gpos contains actual script_list that are in the typeface GSUBScriptList = gsub?.ScriptList; GPOSScriptList = gpos?.ScriptList; }
public GlyphSubStitution(Typeface typeface, string lang) { this.EnableLigation = true;//enable by default this.Lang = lang; this.typeface = typeface; //check if this lang has gsubTable = typeface.GSUBTable; ScriptTable scriptTable = gsubTable.ScriptList.FindScriptTable(lang); //--------- if (scriptTable == null) { return; } //early exit if no lookup tables //--------- ScriptTable.LangSysTable selectedLang = null; if (scriptTable.langSysTables != null && scriptTable.langSysTables.Length > 0) { //TODO: review here selectedLang = scriptTable.langSysTables[0]; } else { selectedLang = scriptTable.defaultLang; } if (selectedLang.HasRequireFeature) { //TODO: review here } //other feature if (selectedLang.featureIndexList != null) { //get features var features = new List <FeatureList.FeatureTable>(); for (int i = 0; i < selectedLang.featureIndexList.Length; ++i) { FeatureList.FeatureTable feature = gsubTable.FeatureList.featureTables[selectedLang.featureIndexList[i]]; switch (feature.TagName) { case "ccmp": //glyph composition/decomposition //this version we implement ccmp features.Add(feature); break; case "liga": //Standard Ligatures --enable by default features.Add(feature); break; } } //----------------------- lookupTables = new List <GSUB.LookupTable>(); int j = features.Count; for (int i = 0; i < j; ++i) { FeatureList.FeatureTable feature = features[i]; ushort[] lookupListIndices = feature.LookupListIndice; foreach (ushort lookupIndex in lookupListIndices) { GSUB.LookupTable lktable = gsubTable.GetLookupTable(lookupIndex); lktable.ForUseWithFeatureId = feature.TagName; lookupTables.Add(gsubTable.GetLookupTable(lookupIndex)); } } } }
internal bool ReadTableEntryCollection(Typeface typeface, RestoreTicket ticket, TableEntryCollection tables, BinaryReader input) { if (ticket != null) { return(ReadTableEntryCollectionOnRestoreMode(typeface, ticket, tables, input)); } typeface.SetTableEntryCollection(tables.CloneTableHeaders()); var rd = new EntriesReaderHelper(tables, input); //PART 1: basic information OS2Table os2Table = rd.Read(new OS2Table()); Meta meta = rd.Read(new Meta()); NameEntry nameEntry = rd.Read(new NameEntry()); Head head = rd.Read(new Head()); MaxProfile maxProfile = rd.Read(new MaxProfile()); HorizontalHeader horizontalHeader = rd.Read(new HorizontalHeader()); HorizontalMetrics horizontalMetrics = rd.Read(new HorizontalMetrics(horizontalHeader.NumberOfHMetrics, maxProfile.GlyphCount)); VerticalHeader vhea = rd.Read(new VerticalHeader()); if (vhea != null) { VerticalMetrics vmtx = rd.Read(new VerticalMetrics(vhea.NumOfLongVerMetrics)); } Cmap cmaps = rd.Read(new Cmap()); VerticalDeviceMetrics vdmx = rd.Read(new VerticalDeviceMetrics()); Kern kern = rd.Read(new Kern()); //------------------------------------ //PART 2: glyphs detail //2.1 True type font GlyphLocations glyphLocations = rd.Read(new GlyphLocations(maxProfile.GlyphCount, head.WideGlyphLocations)); Glyf glyf = rd.Read(new Glyf(glyphLocations)); Gasp gaspTable = rd.Read(new Gasp()); COLR colr = rd.Read(new COLR()); CPAL cpal = rd.Read(new CPAL()); //2.2 Cff font PostTable postTable = rd.Read(new PostTable()); CFFTable cff = rd.Read(new CFFTable()); //additional math table (if available) MathTable mathtable = rd.Read(new MathTable()); //------------------------------------ //PART 3: advanced typography GDEF gdef = rd.Read(new GDEF()); GSUB gsub = rd.Read(new GSUB()); GPOS gpos = rd.Read(new GPOS()); BASE baseTable = rd.Read(new BASE()); JSTF jstf = rd.Read(new JSTF()); STAT stat = rd.Read(new STAT()); if (stat != null) { //variable font FVar fvar = rd.Read(new FVar()); if (fvar != null) { GVar gvar = rd.Read(new GVar()); CVar cvar = rd.Read(new CVar()); HVar hvar = rd.Read(new HVar()); MVar mvar = rd.Read(new MVar()); AVar avar = rd.Read(new AVar()); } } bool isPostScriptOutline = false; bool isBitmapFont = false; typeface.SetBasicTypefaceTables(os2Table, nameEntry, head, horizontalMetrics); if (glyf == null) { //check if this is cff table ? if (cff == null) { //check cbdt/cblc ? CBLC cblcTable = rd.Read(new CBLC()); if (cblcTable != null) { CBDT cbdtTable = rd.Read(new CBDT()); //read cbdt //bitmap font BitmapFontGlyphSource bmpFontGlyphSrc = new BitmapFontGlyphSource(cblcTable); bmpFontGlyphSrc.LoadCBDT(cbdtTable); Glyph[] glyphs = bmpFontGlyphSrc.BuildGlyphList(); typeface.SetBitmapGlyphs(glyphs, bmpFontGlyphSrc); isBitmapFont = true; } else { //TODO: EBLC fontBmpTable = rd.Read(new EBLC()); throw new NotSupportedException(); } } else { isPostScriptOutline = true; typeface.SetCffFontSet(cff.Cff1FontSet); } } else { typeface.SetTtfGlyphs(glyf.Glyphs); } //---------------------------- typeface.CmapTable = cmaps; typeface.KernTable = kern; typeface.MaxProfile = maxProfile; typeface.HheaTable = horizontalHeader; //---------------------------- typeface.GaspTable = gaspTable; if (!isPostScriptOutline && !isBitmapFont) { //for true-type font outline FpgmTable fpgmTable = rd.Read(new FpgmTable()); //control values table CvtTable cvtTable = rd.Read(new CvtTable()); PrepTable propProgramTable = rd.Read(new PrepTable()); typeface.ControlValues = cvtTable?._controlValues; typeface.FpgmProgramBuffer = fpgmTable?._programBuffer; typeface.PrepProgramBuffer = propProgramTable?._programBuffer; } //------------------------- typeface.LoadOpenFontLayoutInfo( gdef, gsub, gpos, baseTable, colr, cpal); //------------ typeface.SetSvgTable(rd.Read(new SvgTable())); typeface.PostTable = postTable; if (mathtable != null) { MathGlyphLoader.LoadMathGlyph(typeface, mathtable); } #if DEBUG //test //int found = typeface.GetGlyphIndexByName("Uacute"); if (typeface.IsCffFont) { //optional typeface.UpdateAllCffGlyphBounds(); } #endif typeface.UpdateLangs(meta); typeface.UpdateFrequentlyUsedValues(); return(true); }