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How to use readTrueTypeCollectionData method in wpt

Best JavaScript code snippet using wpt

fonts.js

Source:fonts.js

...963            return header;964        }965        throw new _util.FormatError('Invalid TrueType Collection majorVersion: ' + majorVersion + '.');966      }967      function readTrueTypeCollectionData(ttc, fontName) {968        var _readTrueTypeCollecti = readTrueTypeCollectionHeader(ttc),969            numFonts = _readTrueTypeCollecti.numFonts,970            offsetTable = _readTrueTypeCollecti.offsetTable;971        for (var i = 0; i < numFonts; i++) {972          ttc.pos = (ttc.start || 0) + offsetTable[i];973          var potentialHeader = readOpenTypeHeader(ttc);974          var potentialTables = readTables(ttc, potentialHeader.numTables);975          if (!potentialTables['name']) {976            throw new _util.FormatError('TrueType Collection font must contain a "name" table.');977          }978          var nameTable = readNameTable(potentialTables['name']);979          for (var j = 0, jj = nameTable.length; j < jj; j++) {980            for (var k = 0, kk = nameTable[j].length; k < kk; k++) {981              var nameEntry = nameTable[j][k];982              if (nameEntry && nameEntry.replace(/\s/g, '') === fontName) {983                return {984                  header: potentialHeader,985                  tables: potentialTables986                };987              }988            }989          }990        }991        throw new _util.FormatError('TrueType Collection does not contain "' + fontName + '" font.');992      }993      function readCmapTable(cmap, font, isSymbolicFont, hasEncoding) {994        if (!cmap) {995          (0, _util.warn)('No cmap table available.');996          return {997            platformId: -1,998            encodingId: -1,999            mappings: [],1000            hasShortCmap: false1001          };1002        }1003        var segment;1004        var start = (font.start ? font.start : 0) + cmap.offset;1005        font.pos = start;1006        font.getUint16();1007        var numTables = font.getUint16();1008        var potentialTable;1009        var canBreak = false;1010        for (var i = 0; i < numTables; i++) {1011          var platformId = font.getUint16();1012          var encodingId = font.getUint16();1013          var offset = font.getInt32() >>> 0;1014          var useTable = false;1015          if (potentialTable && potentialTable.platformId === platformId && potentialTable.encodingId === encodingId) {1016            continue;1017          }1018          if (platformId === 0 && encodingId === 0) {1019            useTable = true;1020          } else if (platformId === 1 && encodingId === 0) {1021            useTable = true;1022          } else if (platformId === 3 && encodingId === 1 && (hasEncoding || !potentialTable)) {1023            useTable = true;1024            if (!isSymbolicFont) {1025              canBreak = true;1026            }1027          } else if (isSymbolicFont && platformId === 3 && encodingId === 0) {1028            useTable = true;1029            canBreak = true;1030          }1031          if (useTable) {1032            potentialTable = {1033              platformId: platformId,1034              encodingId: encodingId,1035              offset: offset1036            };1037          }1038          if (canBreak) {1039            break;1040          }1041        }1042        if (potentialTable) {1043          font.pos = start + potentialTable.offset;1044        }1045        if (!potentialTable || font.peekByte() === -1) {1046          (0, _util.warn)('Could not find a preferred cmap table.');1047          return {1048            platformId: -1,1049            encodingId: -1,1050            mappings: [],1051            hasShortCmap: false1052          };1053        }1054        var format = font.getUint16();1055        font.getUint16();1056        font.getUint16();1057        var hasShortCmap = false;1058        var mappings = [];1059        var j, glyphId;1060        if (format === 0) {1061          for (j = 0; j < 256; j++) {1062            var index = font.getByte();1063            if (!index) {1064              continue;1065            }1066            mappings.push({1067              charCode: j,1068              glyphId: index1069            });1070          }1071          hasShortCmap = true;1072        } else if (format === 4) {1073          var segCount = font.getUint16() >> 1;1074          font.getBytes(6);1075          var segIndex,1076              segments = [];1077          for (segIndex = 0; segIndex < segCount; segIndex++) {1078            segments.push({ end: font.getUint16() });1079          }1080          font.getUint16();1081          for (segIndex = 0; segIndex < segCount; segIndex++) {1082            segments[segIndex].start = font.getUint16();1083          }1084          for (segIndex = 0; segIndex < segCount; segIndex++) {1085            segments[segIndex].delta = font.getUint16();1086          }1087          var offsetsCount = 0;1088          for (segIndex = 0; segIndex < segCount; segIndex++) {1089            segment = segments[segIndex];1090            var rangeOffset = font.getUint16();1091            if (!rangeOffset) {1092              segment.offsetIndex = -1;1093              continue;1094            }1095            var offsetIndex = (rangeOffset >> 1) - (segCount - segIndex);1096            segment.offsetIndex = offsetIndex;1097            offsetsCount = Math.max(offsetsCount, offsetIndex + segment.end - segment.start + 1);1098          }1099          var offsets = [];1100          for (j = 0; j < offsetsCount; j++) {1101            offsets.push(font.getUint16());1102          }1103          for (segIndex = 0; segIndex < segCount; segIndex++) {1104            segment = segments[segIndex];1105            start = segment.start;1106            var end = segment.end;1107            var delta = segment.delta;1108            offsetIndex = segment.offsetIndex;1109            for (j = start; j <= end; j++) {1110              if (j === 0xFFFF) {1111                continue;1112              }1113              glyphId = offsetIndex < 0 ? j : offsets[offsetIndex + j - start];1114              glyphId = glyphId + delta & 0xFFFF;1115              mappings.push({1116                charCode: j,1117                glyphId: glyphId1118              });1119            }1120          }1121        } else if (format === 6) {1122          var firstCode = font.getUint16();1123          var entryCount = font.getUint16();1124          for (j = 0; j < entryCount; j++) {1125            glyphId = font.getUint16();1126            var charCode = firstCode + j;1127            mappings.push({1128              charCode: charCode,1129              glyphId: glyphId1130            });1131          }1132        } else {1133          (0, _util.warn)('cmap table has unsupported format: ' + format);1134          return {1135            platformId: -1,1136            encodingId: -1,1137            mappings: [],1138            hasShortCmap: false1139          };1140        }1141        mappings.sort(function (a, b) {1142          return a.charCode - b.charCode;1143        });1144        for (i = 1; i < mappings.length; i++) {1145          if (mappings[i - 1].charCode === mappings[i].charCode) {1146            mappings.splice(i, 1);1147            i--;1148          }1149        }1150        return {1151          platformId: potentialTable.platformId,1152          encodingId: potentialTable.encodingId,1153          mappings: mappings,1154          hasShortCmap: hasShortCmap1155        };1156      }1157      function sanitizeMetrics(font, header, metrics, numGlyphs) {1158        if (!header) {1159          if (metrics) {1160            metrics.data = null;1161          }1162          return;1163        }1164        font.pos = (font.start ? font.start : 0) + header.offset;1165        font.pos += header.length - 2;1166        var numOfMetrics = font.getUint16();1167        if (numOfMetrics > numGlyphs) {1168          (0, _util.info)('The numOfMetrics (' + numOfMetrics + ') should not be ' + 'greater than the numGlyphs (' + numGlyphs + ')');1169          numOfMetrics = numGlyphs;1170          header.data[34] = (numOfMetrics & 0xff00) >> 8;1171          header.data[35] = numOfMetrics & 0x00ff;1172        }1173        var numOfSidebearings = numGlyphs - numOfMetrics;1174        var numMissing = numOfSidebearings - (metrics.length - numOfMetrics * 4 >> 1);1175        if (numMissing > 0) {1176          var entries = new Uint8Array(metrics.length + numMissing * 2);1177          entries.set(metrics.data);1178          metrics.data = entries;1179        }1180      }1181      function sanitizeGlyph(source, sourceStart, sourceEnd, dest, destStart, hintsValid) {1182        var glyphProfile = {1183          length: 0,1184          sizeOfInstructions: 01185        };1186        if (sourceEnd - sourceStart <= 12) {1187          return glyphProfile;1188        }1189        var glyf = source.subarray(sourceStart, sourceEnd);1190        var contoursCount = signedInt16(glyf[0], glyf[1]);1191        if (contoursCount < 0) {1192          contoursCount = -1;1193          writeSignedInt16(glyf, 0, contoursCount);1194          dest.set(glyf, destStart);1195          glyphProfile.length = glyf.length;1196          return glyphProfile;1197        }1198        var i,1199            j = 10,1200            flagsCount = 0;1201        for (i = 0; i < contoursCount; i++) {1202          var endPoint = glyf[j] << 8 | glyf[j + 1];1203          flagsCount = endPoint + 1;1204          j += 2;1205        }1206        var instructionsStart = j;1207        var instructionsLength = glyf[j] << 8 | glyf[j + 1];1208        glyphProfile.sizeOfInstructions = instructionsLength;1209        j += 2 + instructionsLength;1210        var instructionsEnd = j;1211        var coordinatesLength = 0;1212        for (i = 0; i < flagsCount; i++) {1213          var flag = glyf[j++];1214          if (flag & 0xC0) {1215            glyf[j - 1] = flag & 0x3F;1216          }1217          var xyLength = (flag & 2 ? 1 : flag & 16 ? 0 : 2) + (flag & 4 ? 1 : flag & 32 ? 0 : 2);1218          coordinatesLength += xyLength;1219          if (flag & 8) {1220            var repeat = glyf[j++];1221            i += repeat;1222            coordinatesLength += repeat * xyLength;1223          }1224        }1225        if (coordinatesLength === 0) {1226          return glyphProfile;1227        }1228        var glyphDataLength = j + coordinatesLength;1229        if (glyphDataLength > glyf.length) {1230          return glyphProfile;1231        }1232        if (!hintsValid && instructionsLength > 0) {1233          dest.set(glyf.subarray(0, instructionsStart), destStart);1234          dest.set([0, 0], destStart + instructionsStart);1235          dest.set(glyf.subarray(instructionsEnd, glyphDataLength), destStart + instructionsStart + 2);1236          glyphDataLength -= instructionsLength;1237          if (glyf.length - glyphDataLength > 3) {1238            glyphDataLength = glyphDataLength + 3 & ~3;1239          }1240          glyphProfile.length = glyphDataLength;1241          return glyphProfile;1242        }1243        if (glyf.length - glyphDataLength > 3) {1244          glyphDataLength = glyphDataLength + 3 & ~3;1245          dest.set(glyf.subarray(0, glyphDataLength), destStart);1246          glyphProfile.length = glyphDataLength;1247          return glyphProfile;1248        }1249        dest.set(glyf, destStart);1250        glyphProfile.length = glyf.length;1251        return glyphProfile;1252      }1253      function sanitizeHead(head, numGlyphs, locaLength) {1254        var data = head.data;1255        var version = int32(data[0], data[1], data[2], data[3]);1256        if (version >> 16 !== 1) {1257          (0, _util.info)('Attempting to fix invalid version in head table: ' + version);1258          data[0] = 0;1259          data[1] = 1;1260          data[2] = 0;1261          data[3] = 0;1262        }1263        var indexToLocFormat = int16(data[50], data[51]);1264        if (indexToLocFormat < 0 || indexToLocFormat > 1) {1265          (0, _util.info)('Attempting to fix invalid indexToLocFormat in head table: ' + indexToLocFormat);1266          var numGlyphsPlusOne = numGlyphs + 1;1267          if (locaLength === numGlyphsPlusOne << 1) {1268            data[50] = 0;1269            data[51] = 0;1270          } else if (locaLength === numGlyphsPlusOne << 2) {1271            data[50] = 0;1272            data[51] = 1;1273          } else {1274            throw new _util.FormatError('Could not fix indexToLocFormat: ' + indexToLocFormat);1275          }1276        }1277      }1278      function sanitizeGlyphLocations(loca, glyf, numGlyphs, isGlyphLocationsLong, hintsValid, dupFirstEntry, maxSizeOfInstructions) {1279        var itemSize, itemDecode, itemEncode;1280        if (isGlyphLocationsLong) {1281          itemSize = 4;1282          itemDecode = function fontItemDecodeLong(data, offset) {1283            return data[offset] << 24 | data[offset + 1] << 16 | data[offset + 2] << 8 | data[offset + 3];1284          };1285          itemEncode = function fontItemEncodeLong(data, offset, value) {1286            data[offset] = value >>> 24 & 0xFF;1287            data[offset + 1] = value >> 16 & 0xFF;1288            data[offset + 2] = value >> 8 & 0xFF;1289            data[offset + 3] = value & 0xFF;1290          };1291        } else {1292          itemSize = 2;1293          itemDecode = function fontItemDecode(data, offset) {1294            return data[offset] << 9 | data[offset + 1] << 1;1295          };1296          itemEncode = function fontItemEncode(data, offset, value) {1297            data[offset] = value >> 9 & 0xFF;1298            data[offset + 1] = value >> 1 & 0xFF;1299          };1300        }1301        var locaData = loca.data;1302        var locaDataSize = itemSize * (1 + numGlyphs);1303        if (locaData.length !== locaDataSize) {1304          locaData = new Uint8Array(locaDataSize);1305          locaData.set(loca.data.subarray(0, locaDataSize));1306          loca.data = locaData;1307        }1308        var oldGlyfData = glyf.data;1309        var oldGlyfDataLength = oldGlyfData.length;1310        var newGlyfData = new Uint8Array(oldGlyfDataLength);1311        var startOffset = itemDecode(locaData, 0);1312        var writeOffset = 0;1313        var missingGlyphs = Object.create(null);1314        itemEncode(locaData, 0, writeOffset);1315        var i, j;1316        var locaCount = dupFirstEntry ? numGlyphs - 1 : numGlyphs;1317        for (i = 0, j = itemSize; i < locaCount; i++, j += itemSize) {1318          var endOffset = itemDecode(locaData, j);1319          if (endOffset === 0) {1320            endOffset = startOffset;1321          }1322          if (endOffset > oldGlyfDataLength && (oldGlyfDataLength + 3 & ~3) === endOffset) {1323            endOffset = oldGlyfDataLength;1324          }1325          if (endOffset > oldGlyfDataLength) {1326            startOffset = endOffset;1327          }1328          var glyphProfile = sanitizeGlyph(oldGlyfData, startOffset, endOffset, newGlyfData, writeOffset, hintsValid);1329          var newLength = glyphProfile.length;1330          if (newLength === 0) {1331            missingGlyphs[i] = true;1332          }1333          if (glyphProfile.sizeOfInstructions > maxSizeOfInstructions) {1334            maxSizeOfInstructions = glyphProfile.sizeOfInstructions;1335          }1336          writeOffset += newLength;1337          itemEncode(locaData, j, writeOffset);1338          startOffset = endOffset;1339        }1340        if (writeOffset === 0) {1341          var simpleGlyph = new Uint8Array([0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 49, 0]);1342          for (i = 0, j = itemSize; i < numGlyphs; i++, j += itemSize) {1343            itemEncode(locaData, j, simpleGlyph.length);1344          }1345          glyf.data = simpleGlyph;1346        } else if (dupFirstEntry) {1347          var firstEntryLength = itemDecode(locaData, itemSize);1348          if (newGlyfData.length > firstEntryLength + writeOffset) {1349            glyf.data = newGlyfData.subarray(0, firstEntryLength + writeOffset);1350          } else {1351            glyf.data = new Uint8Array(firstEntryLength + writeOffset);1352            glyf.data.set(newGlyfData.subarray(0, writeOffset));1353          }1354          glyf.data.set(newGlyfData.subarray(0, firstEntryLength), writeOffset);1355          itemEncode(loca.data, locaData.length - itemSize, writeOffset + firstEntryLength);1356        } else {1357          glyf.data = newGlyfData.subarray(0, writeOffset);1358        }1359        return {1360          missingGlyphs: missingGlyphs,1361          maxSizeOfInstructions: maxSizeOfInstructions1362        };1363      }1364      function readPostScriptTable(post, properties, maxpNumGlyphs) {1365        var start = (font.start ? font.start : 0) + post.offset;1366        font.pos = start;1367        var length = post.length,1368            end = start + length;1369        var version = font.getInt32();1370        font.getBytes(28);1371        var glyphNames;1372        var valid = true;1373        var i;1374        switch (version) {1375          case 0x00010000:1376            glyphNames = MacStandardGlyphOrdering;1377            break;1378          case 0x00020000:1379            var numGlyphs = font.getUint16();1380            if (numGlyphs !== maxpNumGlyphs) {1381              valid = false;1382              break;1383            }1384            var glyphNameIndexes = [];1385            for (i = 0; i < numGlyphs; ++i) {1386              var index = font.getUint16();1387              if (index >= 32768) {1388                valid = false;1389                break;1390              }1391              glyphNameIndexes.push(index);1392            }1393            if (!valid) {1394              break;1395            }1396            var customNames = [];1397            var strBuf = [];1398            while (font.pos < end) {1399              var stringLength = font.getByte();1400              strBuf.length = stringLength;1401              for (i = 0; i < stringLength; ++i) {1402                strBuf[i] = String.fromCharCode(font.getByte());1403              }1404              customNames.push(strBuf.join(''));1405            }1406            glyphNames = [];1407            for (i = 0; i < numGlyphs; ++i) {1408              var j = glyphNameIndexes[i];1409              if (j < 258) {1410                glyphNames.push(MacStandardGlyphOrdering[j]);1411                continue;1412              }1413              glyphNames.push(customNames[j - 258]);1414            }1415            break;1416          case 0x00030000:1417            break;1418          default:1419            (0, _util.warn)('Unknown/unsupported post table version ' + version);1420            valid = false;1421            if (properties.defaultEncoding) {1422              glyphNames = properties.defaultEncoding;1423            }1424            break;1425        }1426        properties.glyphNames = glyphNames;1427        return valid;1428      }1429      function readNameTable(nameTable) {1430        var start = (font.start ? font.start : 0) + nameTable.offset;1431        font.pos = start;1432        var names = [[], []];1433        var length = nameTable.length,1434            end = start + length;1435        var format = font.getUint16();1436        var FORMAT_0_HEADER_LENGTH = 6;1437        if (format !== 0 || length < FORMAT_0_HEADER_LENGTH) {1438          return names;1439        }1440        var numRecords = font.getUint16();1441        var stringsStart = font.getUint16();1442        var records = [];1443        var NAME_RECORD_LENGTH = 12;1444        var i, ii;1445        for (i = 0; i < numRecords && font.pos + NAME_RECORD_LENGTH <= end; i++) {1446          var r = {1447            platform: font.getUint16(),1448            encoding: font.getUint16(),1449            language: font.getUint16(),1450            name: font.getUint16(),1451            length: font.getUint16(),1452            offset: font.getUint16()1453          };1454          if (r.platform === 1 && r.encoding === 0 && r.language === 0 || r.platform === 3 && r.encoding === 1 && r.language === 0x409) {1455            records.push(r);1456          }1457        }1458        for (i = 0, ii = records.length; i < ii; i++) {1459          var record = records[i];1460          if (record.length <= 0) {1461            continue;1462          }1463          var pos = start + stringsStart + record.offset;1464          if (pos + record.length > end) {1465            continue;1466          }1467          font.pos = pos;1468          var nameIndex = record.name;1469          if (record.encoding) {1470            var str = '';1471            for (var j = 0, jj = record.length; j < jj; j += 2) {1472              str += String.fromCharCode(font.getUint16());1473            }1474            names[1][nameIndex] = str;1475          } else {1476            names[0][nameIndex] = (0, _util.bytesToString)(font.getBytes(record.length));1477          }1478        }1479        return names;1480      }1481      var TTOpsStackDeltas = [0, 0, 0, 0, 0, 0, 0, 0, -2, -2, -2, -2, 0, 0, -2, -5, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, -1, 0, -1, -1, -1, -1, 1, -1, -999, 0, 1, 0, -1, -2, 0, -1, -2, -1, -1, 0, -1, -1, 0, 0, -999, -999, -1, -1, -1, -1, -2, -999, -2, -2, -999, 0, -2, -2, 0, 0, -2, 0, -2, 0, 0, 0, -2, -1, -1, 1, 1, 0, 0, -1, -1, -1, -1, -1, -1, -1, 0, 0, -1, 0, -1, -1, 0, -999, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -2, -999, -999, -999, -999, -999, -1, -1, -2, -2, 0, 0, 0, 0, -1, -1, -999, -2, -2, 0, 0, -1, -2, -2, 0, 0, 0, -1, -1, -1, -2];1482      function sanitizeTTProgram(table, ttContext) {1483        var data = table.data;1484        var i = 0,1485            j,1486            n,1487            b,1488            funcId,1489            pc,1490            lastEndf = 0,1491            lastDeff = 0;1492        var stack = [];1493        var callstack = [];1494        var functionsCalled = [];1495        var tooComplexToFollowFunctions = ttContext.tooComplexToFollowFunctions;1496        var inFDEF = false,1497            ifLevel = 0,1498            inELSE = 0;1499        for (var ii = data.length; i < ii;) {1500          var op = data[i++];1501          if (op === 0x40) {1502            n = data[i++];1503            if (inFDEF || inELSE) {1504              i += n;1505            } else {1506              for (j = 0; j < n; j++) {1507                stack.push(data[i++]);1508              }1509            }1510          } else if (op === 0x41) {1511            n = data[i++];1512            if (inFDEF || inELSE) {1513              i += n * 2;1514            } else {1515              for (j = 0; j < n; j++) {1516                b = data[i++];1517                stack.push(b << 8 | data[i++]);1518              }1519            }1520          } else if ((op & 0xF8) === 0xB0) {1521            n = op - 0xB0 + 1;1522            if (inFDEF || inELSE) {1523              i += n;1524            } else {1525              for (j = 0; j < n; j++) {1526                stack.push(data[i++]);1527              }1528            }1529          } else if ((op & 0xF8) === 0xB8) {1530            n = op - 0xB8 + 1;1531            if (inFDEF || inELSE) {1532              i += n * 2;1533            } else {1534              for (j = 0; j < n; j++) {1535                b = data[i++];1536                stack.push(b << 8 | data[i++]);1537              }1538            }1539          } else if (op === 0x2B && !tooComplexToFollowFunctions) {1540            if (!inFDEF && !inELSE) {1541              funcId = stack[stack.length - 1];1542              ttContext.functionsUsed[funcId] = true;1543              if (funcId in ttContext.functionsStackDeltas) {1544                stack.length += ttContext.functionsStackDeltas[funcId];1545              } else if (funcId in ttContext.functionsDefined && functionsCalled.indexOf(funcId) < 0) {1546                callstack.push({1547                  data: data,1548                  i: i,1549                  stackTop: stack.length - 11550                });1551                functionsCalled.push(funcId);1552                pc = ttContext.functionsDefined[funcId];1553                if (!pc) {1554                  (0, _util.warn)('TT: CALL non-existent function');1555                  ttContext.hintsValid = false;1556                  return;1557                }1558                data = pc.data;1559                i = pc.i;1560              }1561            }1562          } else if (op === 0x2C && !tooComplexToFollowFunctions) {1563            if (inFDEF || inELSE) {1564              (0, _util.warn)('TT: nested FDEFs not allowed');1565              tooComplexToFollowFunctions = true;1566            }1567            inFDEF = true;1568            lastDeff = i;1569            funcId = stack.pop();1570            ttContext.functionsDefined[funcId] = {1571              data: data,1572              i: i1573            };1574          } else if (op === 0x2D) {1575            if (inFDEF) {1576              inFDEF = false;1577              lastEndf = i;1578            } else {1579              pc = callstack.pop();1580              if (!pc) {1581                (0, _util.warn)('TT: ENDF bad stack');1582                ttContext.hintsValid = false;1583                return;1584              }1585              funcId = functionsCalled.pop();1586              data = pc.data;1587              i = pc.i;1588              ttContext.functionsStackDeltas[funcId] = stack.length - pc.stackTop;1589            }1590          } else if (op === 0x89) {1591            if (inFDEF || inELSE) {1592              (0, _util.warn)('TT: nested IDEFs not allowed');1593              tooComplexToFollowFunctions = true;1594            }1595            inFDEF = true;1596            lastDeff = i;1597          } else if (op === 0x58) {1598            ++ifLevel;1599          } else if (op === 0x1B) {1600            inELSE = ifLevel;1601          } else if (op === 0x59) {1602            if (inELSE === ifLevel) {1603              inELSE = 0;1604            }1605            --ifLevel;1606          } else if (op === 0x1C) {1607            if (!inFDEF && !inELSE) {1608              var offset = stack[stack.length - 1];1609              if (offset > 0) {1610                i += offset - 1;1611              }1612            }1613          }1614          if (!inFDEF && !inELSE) {1615            var stackDelta = op <= 0x8E ? TTOpsStackDeltas[op] : op >= 0xC0 && op <= 0xDF ? -1 : op >= 0xE0 ? -2 : 0;1616            if (op >= 0x71 && op <= 0x75) {1617              n = stack.pop();1618              if (!isNaN(n)) {1619                stackDelta = -n * 2;1620              }1621            }1622            while (stackDelta < 0 && stack.length > 0) {1623              stack.pop();1624              stackDelta++;1625            }1626            while (stackDelta > 0) {1627              stack.push(NaN);1628              stackDelta--;1629            }1630          }1631        }1632        ttContext.tooComplexToFollowFunctions = tooComplexToFollowFunctions;1633        var content = [data];1634        if (i > data.length) {1635          content.push(new Uint8Array(i - data.length));1636        }1637        if (lastDeff > lastEndf) {1638          (0, _util.warn)('TT: complementing a missing function tail');1639          content.push(new Uint8Array([0x22, 0x2D]));1640        }1641        foldTTTable(table, content);1642      }1643      function checkInvalidFunctions(ttContext, maxFunctionDefs) {1644        if (ttContext.tooComplexToFollowFunctions) {1645          return;1646        }1647        if (ttContext.functionsDefined.length > maxFunctionDefs) {1648          (0, _util.warn)('TT: more functions defined than expected');1649          ttContext.hintsValid = false;1650          return;1651        }1652        for (var j = 0, jj = ttContext.functionsUsed.length; j < jj; j++) {1653          if (j > maxFunctionDefs) {1654            (0, _util.warn)('TT: invalid function id: ' + j);1655            ttContext.hintsValid = false;1656            return;1657          }1658          if (ttContext.functionsUsed[j] && !ttContext.functionsDefined[j]) {1659            (0, _util.warn)('TT: undefined function: ' + j);1660            ttContext.hintsValid = false;1661            return;1662          }1663        }1664      }1665      function foldTTTable(table, content) {1666        if (content.length > 1) {1667          var newLength = 0;1668          var j, jj;1669          for (j = 0, jj = content.length; j < jj; j++) {1670            newLength += content[j].length;1671          }1672          newLength = newLength + 3 & ~3;1673          var result = new Uint8Array(newLength);1674          var pos = 0;1675          for (j = 0, jj = content.length; j < jj; j++) {1676            result.set(content[j], pos);1677            pos += content[j].length;1678          }1679          table.data = result;1680          table.length = newLength;1681        }1682      }1683      function sanitizeTTPrograms(fpgm, prep, cvt, maxFunctionDefs) {1684        var ttContext = {1685          functionsDefined: [],1686          functionsUsed: [],1687          functionsStackDeltas: [],1688          tooComplexToFollowFunctions: false,1689          hintsValid: true1690        };1691        if (fpgm) {1692          sanitizeTTProgram(fpgm, ttContext);1693        }1694        if (prep) {1695          sanitizeTTProgram(prep, ttContext);1696        }1697        if (fpgm) {1698          checkInvalidFunctions(ttContext, maxFunctionDefs);1699        }1700        if (cvt && cvt.length & 1) {1701          var cvtData = new Uint8Array(cvt.length + 1);1702          cvtData.set(cvt.data);1703          cvt.data = cvtData;1704        }1705        return ttContext.hintsValid;1706      }1707      font = new _stream.Stream(new Uint8Array(font.getBytes()));1708      var header = void 0,1709          tables = void 0;1710      if (isTrueTypeCollectionFile(font)) {1711        var ttcData = readTrueTypeCollectionData(font, this.name);1712        header = ttcData.header;1713        tables = ttcData.tables;1714      } else {1715        header = readOpenTypeHeader(font);1716        tables = readTables(font, header.numTables);1717      }1718      var cff = void 0,1719          cffFile = void 0;1720      var isTrueType = !tables['CFF '];1721      if (!isTrueType) {1722        if (header.version === 'OTTO' && !(properties.composite && properties.cidToGidMap) || !tables['head'] || !tables['hhea'] || !tables['maxp'] || !tables['post']) {1723          cffFile = new _stream.Stream(tables['CFF '].data);1724          cff = new CFFFont(cffFile, properties);1725          adjustWidths(properties);...

Using AI Code Generation

1var wptt = require('wptt');2var fs = require('fs');3var buffer = fs.readFileSync('test.ttc');4var data = wptt.readTrueTypeCollectionData(buffer);5console.log(data);6var wptt = require('wptt');7var fs = require('fs');8var buffer = fs.readFileSync('test.ttf');9var data = wptt.readTrueTypeFontData(buffer);10console.log(data);11var wptt = require('wptt');12var fs = require('fs');13var buffer = fs.readFileSync('test.ttf');14var data = wptt.readTrueTypeData(buffer);15console.log(data);16### `readTrueTypeCollectionData(buffer)`17### `readTrueTypeFontData(buffer)`18### `readTrueTypeData(buffer)`19[MIT](LICENSE)

Using AI Code Generation

1var wptt = require('wptt');2wptt.readTrueTypeCollectionData('font.ttf', function(err, data) {3  if (err) throw err;4  console.log(data);5});6### wptt.readTrueTypeCollectionData(fontPath, callback)

Using AI Code Generation

1var wptt = require('wptt');2var fs = require('fs');3var buffer = fs.readFileSync('test.ttf');4wptt.readTrueTypeCollectionData(buffer, function(err, data) {5  if (err) {6    console.log(err);7    return;8  }9  console.log(data);10});

Using AI Code Generation

1var wptt = require('wptt');2var fs = require('fs');3var path = require('path');4var data = fs.readFileSync(path.join(__dirname, 'test.ttf'));5var ttcData = wptt.readTrueTypeCollectionData(data);6console.log('Number of fonts in collection: ' + ttcData.fonts.length);7console.log('Font names:');8for (var i = 0; i < ttcData.fonts.length; i++) {9    console.log('Font #' + i + ': ' + ttcData.fonts[i].name);10}11### readTrueTypeCollectionData(data)12    * `name`: Font name (string)13[MIT](LICENSE)

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.