How to use decodeHalftoneRegion method in wpt

Best JavaScript code snippet using wpt

jbig2.js

Source:jbig2.js

...683      i++;684    }685    return patterns;686  }687  function decodeHalftoneRegion(mmr, patterns, template, regionWidth, regionHeight, defaultPixelValue, enableSkip, combinationOperator, gridWidth, gridHeight, gridOffsetX, gridOffsetY, gridVectorX, gridVectorY, decodingContext) {688    var skip = null;689    if (enableSkip) {690      throw new Jbig2Error('skip is not supported');691    }692    if (combinationOperator !== 0) {693      throw new Jbig2Error('operator ' + combinationOperator + ' is not supported in halftone region');694    }695    var regionBitmap = [];696    var i = void 0,697        j = void 0,698        row = void 0;699    for (i = 0; i < regionHeight; i++) {700      row = new Uint8Array(regionWidth);701      if (defaultPixelValue) {702        for (j = 0; j < regionWidth; j++) {703          row[j] = defaultPixelValue;704        }705      }706      regionBitmap.push(row);707    }708    var numberOfPatterns = patterns.length;709    var pattern0 = patterns[0];710    var patternWidth = pattern0[0].length,711        patternHeight = pattern0.length;712    var bitsPerValue = (0, _util.log2)(numberOfPatterns);713    var at = [];714    at.push({715      x: template <= 1 ? 3 : 2,716      y: -1717    });718    if (template === 0) {719      at.push({720        x: -3,721        y: -1722      });723      at.push({724        x: 2,725        y: -2726      });727      at.push({728        x: -2,729        y: -2730      });731    }732    var grayScaleBitPlanes = [];733    for (i = bitsPerValue - 1; i >= 0; i--) {734      grayScaleBitPlanes[i] = decodeBitmap(mmr, gridWidth, gridHeight, template, false, skip, at, decodingContext);735    }736    var mg = void 0,737        ng = void 0,738        bit = void 0,739        patternIndex = void 0,740        patternBitmap = void 0,741        x = void 0,742        y = void 0,743        patternRow = void 0,744        regionRow = void 0;745    for (mg = 0; mg < gridHeight; mg++) {746      for (ng = 0; ng < gridWidth; ng++) {747        bit = 0;748        patternIndex = 0;749        for (j = bitsPerValue - 1; j >= 0; j--) {750          bit = grayScaleBitPlanes[j][mg][ng] ^ bit;751          patternIndex |= bit << j;752        }753        patternBitmap = patterns[patternIndex];754        x = gridOffsetX + mg * gridVectorY + ng * gridVectorX >> 8;755        y = gridOffsetY + mg * gridVectorX - ng * gridVectorY >> 8;756        if (x >= 0 && x + patternWidth <= regionWidth && y >= 0 && y + patternHeight <= regionHeight) {757          for (i = 0; i < patternHeight; i++) {758            regionRow = regionBitmap[y + i];759            patternRow = patternBitmap[i];760            for (j = 0; j < patternWidth; j++) {761              regionRow[x + j] |= patternRow[j];762            }763          }764        } else {765          var regionX = void 0,766              regionY = void 0;767          for (i = 0; i < patternHeight; i++) {768            regionY = y + i;769            if (regionY < 0 || regionY >= regionHeight) {770              continue;771            }772            regionRow = regionBitmap[regionY];773            patternRow = patternBitmap[i];774            for (j = 0; j < patternWidth; j++) {775              regionX = x + j;776              if (regionX >= 0 && regionX < regionWidth) {777                regionRow[regionX] |= patternRow[j];778              }779            }780          }781        }782      }783    }784    return regionBitmap;785  }786  function readSegmentHeader(data, start) {787    var segmentHeader = {};788    segmentHeader.number = (0, _util.readUint32)(data, start);789    var flags = data[start + 4];790    var segmentType = flags & 0x3F;791    if (!SegmentTypes[segmentType]) {792      throw new Jbig2Error('invalid segment type: ' + segmentType);793    }794    segmentHeader.type = segmentType;795    segmentHeader.typeName = SegmentTypes[segmentType];796    segmentHeader.deferredNonRetain = !!(flags & 0x80);797    var pageAssociationFieldSize = !!(flags & 0x40);798    var referredFlags = data[start + 5];799    var referredToCount = referredFlags >> 5 & 7;800    var retainBits = [referredFlags & 31];801    var position = start + 6;802    if (referredFlags === 7) {803      referredToCount = (0, _util.readUint32)(data, position - 1) & 0x1FFFFFFF;804      position += 3;805      var bytes = referredToCount + 7 >> 3;806      retainBits[0] = data[position++];807      while (--bytes > 0) {808        retainBits.push(data[position++]);809      }810    } else if (referredFlags === 5 || referredFlags === 6) {811      throw new Jbig2Error('invalid referred-to flags');812    }813    segmentHeader.retainBits = retainBits;814    var referredToSegmentNumberSize = segmentHeader.number <= 256 ? 1 : segmentHeader.number <= 65536 ? 2 : 4;815    var referredTo = [];816    var i, ii;817    for (i = 0; i < referredToCount; i++) {818      var number = referredToSegmentNumberSize === 1 ? data[position] : referredToSegmentNumberSize === 2 ? (0, _util.readUint16)(data, position) : (0, _util.readUint32)(data, position);819      referredTo.push(number);820      position += referredToSegmentNumberSize;821    }822    segmentHeader.referredTo = referredTo;823    if (!pageAssociationFieldSize) {824      segmentHeader.pageAssociation = data[position++];825    } else {826      segmentHeader.pageAssociation = (0, _util.readUint32)(data, position);827      position += 4;828    }829    segmentHeader.length = (0, _util.readUint32)(data, position);830    position += 4;831    if (segmentHeader.length === 0xFFFFFFFF) {832      if (segmentType === 38) {833        var genericRegionInfo = readRegionSegmentInformation(data, position);834        var genericRegionSegmentFlags = data[position + RegionSegmentInformationFieldLength];835        var genericRegionMmr = !!(genericRegionSegmentFlags & 1);836        var searchPatternLength = 6;837        var searchPattern = new Uint8Array(searchPatternLength);838        if (!genericRegionMmr) {839          searchPattern[0] = 0xFF;840          searchPattern[1] = 0xAC;841        }842        searchPattern[2] = genericRegionInfo.height >>> 24 & 0xFF;843        searchPattern[3] = genericRegionInfo.height >> 16 & 0xFF;844        searchPattern[4] = genericRegionInfo.height >> 8 & 0xFF;845        searchPattern[5] = genericRegionInfo.height & 0xFF;846        for (i = position, ii = data.length; i < ii; i++) {847          var j = 0;848          while (j < searchPatternLength && searchPattern[j] === data[i + j]) {849            j++;850          }851          if (j === searchPatternLength) {852            segmentHeader.length = i + searchPatternLength;853            break;854          }855        }856        if (segmentHeader.length === 0xFFFFFFFF) {857          throw new Jbig2Error('segment end was not found');858        }859      } else {860        throw new Jbig2Error('invalid unknown segment length');861      }862    }863    segmentHeader.headerEnd = position;864    return segmentHeader;865  }866  function readSegments(header, data, start, end) {867    var segments = [];868    var position = start;869    while (position < end) {870      var segmentHeader = readSegmentHeader(data, position);871      position = segmentHeader.headerEnd;872      var segment = {873        header: segmentHeader,874        data: data875      };876      if (!header.randomAccess) {877        segment.start = position;878        position += segmentHeader.length;879        segment.end = position;880      }881      segments.push(segment);882      if (segmentHeader.type === 51) {883        break;884      }885    }886    if (header.randomAccess) {887      for (var i = 0, ii = segments.length; i < ii; i++) {888        segments[i].start = position;889        position += segments[i].header.length;890        segments[i].end = position;891      }892    }893    return segments;894  }895  function readRegionSegmentInformation(data, start) {896    return {897      width: (0, _util.readUint32)(data, start),898      height: (0, _util.readUint32)(data, start + 4),899      x: (0, _util.readUint32)(data, start + 8),900      y: (0, _util.readUint32)(data, start + 12),901      combinationOperator: data[start + 16] & 7902    };903  }904  var RegionSegmentInformationFieldLength = 17;905  function processSegment(segment, visitor) {906    var header = segment.header;907    var data = segment.data,908        position = segment.start,909        end = segment.end;910    var args, at, i, atLength;911    switch (header.type) {912      case 0:913        var dictionary = {};914        var dictionaryFlags = (0, _util.readUint16)(data, position);915        dictionary.huffman = !!(dictionaryFlags & 1);916        dictionary.refinement = !!(dictionaryFlags & 2);917        dictionary.huffmanDHSelector = dictionaryFlags >> 2 & 3;918        dictionary.huffmanDWSelector = dictionaryFlags >> 4 & 3;919        dictionary.bitmapSizeSelector = dictionaryFlags >> 6 & 1;920        dictionary.aggregationInstancesSelector = dictionaryFlags >> 7 & 1;921        dictionary.bitmapCodingContextUsed = !!(dictionaryFlags & 256);922        dictionary.bitmapCodingContextRetained = !!(dictionaryFlags & 512);923        dictionary.template = dictionaryFlags >> 10 & 3;924        dictionary.refinementTemplate = dictionaryFlags >> 12 & 1;925        position += 2;926        if (!dictionary.huffman) {927          atLength = dictionary.template === 0 ? 4 : 1;928          at = [];929          for (i = 0; i < atLength; i++) {930            at.push({931              x: (0, _util.readInt8)(data, position),932              y: (0, _util.readInt8)(data, position + 1)933            });934            position += 2;935          }936          dictionary.at = at;937        }938        if (dictionary.refinement && !dictionary.refinementTemplate) {939          at = [];940          for (i = 0; i < 2; i++) {941            at.push({942              x: (0, _util.readInt8)(data, position),943              y: (0, _util.readInt8)(data, position + 1)944            });945            position += 2;946          }947          dictionary.refinementAt = at;948        }949        dictionary.numberOfExportedSymbols = (0, _util.readUint32)(data, position);950        position += 4;951        dictionary.numberOfNewSymbols = (0, _util.readUint32)(data, position);952        position += 4;953        args = [dictionary, header.number, header.referredTo, data, position, end];954        break;955      case 6:956      case 7:957        var textRegion = {};958        textRegion.info = readRegionSegmentInformation(data, position);959        position += RegionSegmentInformationFieldLength;960        var textRegionSegmentFlags = (0, _util.readUint16)(data, position);961        position += 2;962        textRegion.huffman = !!(textRegionSegmentFlags & 1);963        textRegion.refinement = !!(textRegionSegmentFlags & 2);964        textRegion.stripSize = 1 << (textRegionSegmentFlags >> 2 & 3);965        textRegion.referenceCorner = textRegionSegmentFlags >> 4 & 3;966        textRegion.transposed = !!(textRegionSegmentFlags & 64);967        textRegion.combinationOperator = textRegionSegmentFlags >> 7 & 3;968        textRegion.defaultPixelValue = textRegionSegmentFlags >> 9 & 1;969        textRegion.dsOffset = textRegionSegmentFlags << 17 >> 27;970        textRegion.refinementTemplate = textRegionSegmentFlags >> 15 & 1;971        if (textRegion.huffman) {972          var textRegionHuffmanFlags = (0, _util.readUint16)(data, position);973          position += 2;974          textRegion.huffmanFS = textRegionHuffmanFlags & 3;975          textRegion.huffmanDS = textRegionHuffmanFlags >> 2 & 3;976          textRegion.huffmanDT = textRegionHuffmanFlags >> 4 & 3;977          textRegion.huffmanRefinementDW = textRegionHuffmanFlags >> 6 & 3;978          textRegion.huffmanRefinementDH = textRegionHuffmanFlags >> 8 & 3;979          textRegion.huffmanRefinementDX = textRegionHuffmanFlags >> 10 & 3;980          textRegion.huffmanRefinementDY = textRegionHuffmanFlags >> 12 & 3;981          textRegion.huffmanRefinementSizeSelector = !!(textRegionHuffmanFlags & 14);982        }983        if (textRegion.refinement && !textRegion.refinementTemplate) {984          at = [];985          for (i = 0; i < 2; i++) {986            at.push({987              x: (0, _util.readInt8)(data, position),988              y: (0, _util.readInt8)(data, position + 1)989            });990            position += 2;991          }992          textRegion.refinementAt = at;993        }994        textRegion.numberOfSymbolInstances = (0, _util.readUint32)(data, position);995        position += 4;996        if (textRegion.huffman) {997          throw new Jbig2Error('huffman is not supported');998        }999        args = [textRegion, header.referredTo, data, position, end];1000        break;1001      case 16:1002        var patternDictionary = {};1003        var patternDictionaryFlags = data[position++];1004        patternDictionary.mmr = !!(patternDictionaryFlags & 1);1005        patternDictionary.template = patternDictionaryFlags >> 1 & 3;1006        patternDictionary.patternWidth = data[position++];1007        patternDictionary.patternHeight = data[position++];1008        patternDictionary.maxPatternIndex = (0, _util.readUint32)(data, position);1009        position += 4;1010        args = [patternDictionary, header.number, data, position, end];1011        break;1012      case 22:1013      case 23:1014        var halftoneRegion = {};1015        halftoneRegion.info = readRegionSegmentInformation(data, position);1016        position += RegionSegmentInformationFieldLength;1017        var halftoneRegionFlags = data[position++];1018        halftoneRegion.mmr = !!(halftoneRegionFlags & 1);1019        halftoneRegion.template = halftoneRegionFlags >> 1 & 3;1020        halftoneRegion.enableSkip = !!(halftoneRegionFlags & 8);1021        halftoneRegion.combinationOperator = halftoneRegionFlags >> 4 & 7;1022        halftoneRegion.defaultPixelValue = halftoneRegionFlags >> 7 & 1;1023        halftoneRegion.gridWidth = (0, _util.readUint32)(data, position);1024        position += 4;1025        halftoneRegion.gridHeight = (0, _util.readUint32)(data, position);1026        position += 4;1027        halftoneRegion.gridOffsetX = (0, _util.readUint32)(data, position) & 0xFFFFFFFF;1028        position += 4;1029        halftoneRegion.gridOffsetY = (0, _util.readUint32)(data, position) & 0xFFFFFFFF;1030        position += 4;1031        halftoneRegion.gridVectorX = (0, _util.readUint16)(data, position);1032        position += 2;1033        halftoneRegion.gridVectorY = (0, _util.readUint16)(data, position);1034        position += 2;1035        args = [halftoneRegion, header.referredTo, data, position, end];1036        break;1037      case 38:1038      case 39:1039        var genericRegion = {};1040        genericRegion.info = readRegionSegmentInformation(data, position);1041        position += RegionSegmentInformationFieldLength;1042        var genericRegionSegmentFlags = data[position++];1043        genericRegion.mmr = !!(genericRegionSegmentFlags & 1);1044        genericRegion.template = genericRegionSegmentFlags >> 1 & 3;1045        genericRegion.prediction = !!(genericRegionSegmentFlags & 8);1046        if (!genericRegion.mmr) {1047          atLength = genericRegion.template === 0 ? 4 : 1;1048          at = [];1049          for (i = 0; i < atLength; i++) {1050            at.push({1051              x: (0, _util.readInt8)(data, position),1052              y: (0, _util.readInt8)(data, position + 1)1053            });1054            position += 2;1055          }1056          genericRegion.at = at;1057        }1058        args = [genericRegion, data, position, end];1059        break;1060      case 48:1061        var pageInfo = {1062          width: (0, _util.readUint32)(data, position),1063          height: (0, _util.readUint32)(data, position + 4),1064          resolutionX: (0, _util.readUint32)(data, position + 8),1065          resolutionY: (0, _util.readUint32)(data, position + 12)1066        };1067        if (pageInfo.height === 0xFFFFFFFF) {1068          delete pageInfo.height;1069        }1070        var pageSegmentFlags = data[position + 16];1071        (0, _util.readUint16)(data, position + 17);1072        pageInfo.lossless = !!(pageSegmentFlags & 1);1073        pageInfo.refinement = !!(pageSegmentFlags & 2);1074        pageInfo.defaultPixelValue = pageSegmentFlags >> 2 & 1;1075        pageInfo.combinationOperator = pageSegmentFlags >> 3 & 3;1076        pageInfo.requiresBuffer = !!(pageSegmentFlags & 32);1077        pageInfo.combinationOperatorOverride = !!(pageSegmentFlags & 64);1078        args = [pageInfo];1079        break;1080      case 49:1081        break;1082      case 50:1083        break;1084      case 51:1085        break;1086      case 62:1087        break;1088      default:1089        throw new Jbig2Error('segment type ' + header.typeName + '(' + header.type + ')' + ' is not implemented');1090    }1091    var callbackName = 'on' + header.typeName;1092    if (callbackName in visitor) {1093      visitor[callbackName].apply(visitor, args);1094    }1095  }1096  function processSegments(segments, visitor) {1097    for (var i = 0, ii = segments.length; i < ii; i++) {1098      processSegment(segments[i], visitor);1099    }1100  }1101  function parseJbig2(data, start, end) {1102    var position = start;1103    if (data[position] !== 0x97 || data[position + 1] !== 0x4A || data[position + 2] !== 0x42 || data[position + 3] !== 0x32 || data[position + 4] !== 0x0D || data[position + 5] !== 0x0A || data[position + 6] !== 0x1A || data[position + 7] !== 0x0A) {1104      throw new Jbig2Error('invalid header');1105    }1106    var header = {};1107    position += 8;1108    var flags = data[position++];1109    header.randomAccess = !(flags & 1);1110    if (!(flags & 2)) {1111      header.numberOfPages = (0, _util.readUint32)(data, position);1112      position += 4;1113    }1114    readSegments(header, data, position, end);1115    throw new Error('Not implemented');1116  }1117  function parseJbig2Chunks(chunks) {1118    var visitor = new SimpleSegmentVisitor();1119    for (var i = 0, ii = chunks.length; i < ii; i++) {1120      var chunk = chunks[i];1121      var segments = readSegments({}, chunk.data, chunk.start, chunk.end);1122      processSegments(segments, visitor);1123    }1124    return visitor.buffer;1125  }1126  function SimpleSegmentVisitor() {}1127  SimpleSegmentVisitor.prototype = {1128    onPageInformation: function SimpleSegmentVisitor_onPageInformation(info) {1129      this.currentPageInfo = info;1130      var rowSize = info.width + 7 >> 3;1131      var buffer = new Uint8ClampedArray(rowSize * info.height);1132      if (info.defaultPixelValue) {1133        for (var i = 0, ii = buffer.length; i < ii; i++) {1134          buffer[i] = 0xFF;1135        }1136      }1137      this.buffer = buffer;1138    },1139    drawBitmap: function SimpleSegmentVisitor_drawBitmap(regionInfo, bitmap) {1140      var pageInfo = this.currentPageInfo;1141      var width = regionInfo.width,1142          height = regionInfo.height;1143      var rowSize = pageInfo.width + 7 >> 3;1144      var combinationOperator = pageInfo.combinationOperatorOverride ? regionInfo.combinationOperator : pageInfo.combinationOperator;1145      var buffer = this.buffer;1146      var mask0 = 128 >> (regionInfo.x & 7);1147      var offset0 = regionInfo.y * rowSize + (regionInfo.x >> 3);1148      var i, j, mask, offset;1149      switch (combinationOperator) {1150        case 0:1151          for (i = 0; i < height; i++) {1152            mask = mask0;1153            offset = offset0;1154            for (j = 0; j < width; j++) {1155              if (bitmap[i][j]) {1156                buffer[offset] |= mask;1157              }1158              mask >>= 1;1159              if (!mask) {1160                mask = 128;1161                offset++;1162              }1163            }1164            offset0 += rowSize;1165          }1166          break;1167        case 2:1168          for (i = 0; i < height; i++) {1169            mask = mask0;1170            offset = offset0;1171            for (j = 0; j < width; j++) {1172              if (bitmap[i][j]) {1173                buffer[offset] ^= mask;1174              }1175              mask >>= 1;1176              if (!mask) {1177                mask = 128;1178                offset++;1179              }1180            }1181            offset0 += rowSize;1182          }1183          break;1184        default:1185          throw new Jbig2Error('operator ' + combinationOperator + ' is not supported');1186      }1187    },1188    onImmediateGenericRegion: function SimpleSegmentVisitor_onImmediateGenericRegion(region, data, start, end) {1189      var regionInfo = region.info;1190      var decodingContext = new DecodingContext(data, start, end);1191      var bitmap = decodeBitmap(region.mmr, regionInfo.width, regionInfo.height, region.template, region.prediction, null, region.at, decodingContext);1192      this.drawBitmap(regionInfo, bitmap);1193    },1194    onImmediateLosslessGenericRegion: function SimpleSegmentVisitor_onImmediateLosslessGenericRegion() {1195      this.onImmediateGenericRegion.apply(this, arguments);1196    },1197    onSymbolDictionary: function SimpleSegmentVisitor_onSymbolDictionary(dictionary, currentSegment, referredSegments, data, start, end) {1198      var huffmanTables;1199      if (dictionary.huffman) {1200        throw new Jbig2Error('huffman is not supported');1201      }1202      var symbols = this.symbols;1203      if (!symbols) {1204        this.symbols = symbols = {};1205      }1206      var inputSymbols = [];1207      for (var i = 0, ii = referredSegments.length; i < ii; i++) {1208        inputSymbols = inputSymbols.concat(symbols[referredSegments[i]]);1209      }1210      var decodingContext = new DecodingContext(data, start, end);1211      symbols[currentSegment] = decodeSymbolDictionary(dictionary.huffman, dictionary.refinement, inputSymbols, dictionary.numberOfNewSymbols, dictionary.numberOfExportedSymbols, huffmanTables, dictionary.template, dictionary.at, dictionary.refinementTemplate, dictionary.refinementAt, decodingContext);1212    },1213    onImmediateTextRegion: function SimpleSegmentVisitor_onImmediateTextRegion(region, referredSegments, data, start, end) {1214      var regionInfo = region.info;1215      var huffmanTables;1216      var symbols = this.symbols;1217      var inputSymbols = [];1218      for (var i = 0, ii = referredSegments.length; i < ii; i++) {1219        inputSymbols = inputSymbols.concat(symbols[referredSegments[i]]);1220      }1221      var symbolCodeLength = (0, _util.log2)(inputSymbols.length);1222      var decodingContext = new DecodingContext(data, start, end);1223      var bitmap = decodeTextRegion(region.huffman, region.refinement, regionInfo.width, regionInfo.height, region.defaultPixelValue, region.numberOfSymbolInstances, region.stripSize, inputSymbols, symbolCodeLength, region.transposed, region.dsOffset, region.referenceCorner, region.combinationOperator, huffmanTables, region.refinementTemplate, region.refinementAt, decodingContext);1224      this.drawBitmap(regionInfo, bitmap);1225    },1226    onImmediateLosslessTextRegion: function SimpleSegmentVisitor_onImmediateLosslessTextRegion() {1227      this.onImmediateTextRegion.apply(this, arguments);1228    },1229    onPatternDictionary: function onPatternDictionary(dictionary, currentSegment, data, start, end) {1230      var patterns = this.patterns;1231      if (!patterns) {1232        this.patterns = patterns = {};1233      }1234      var decodingContext = new DecodingContext(data, start, end);1235      patterns[currentSegment] = decodePatternDictionary(dictionary.mmr, dictionary.patternWidth, dictionary.patternHeight, dictionary.maxPatternIndex, dictionary.template, decodingContext);1236    },1237    onImmediateHalftoneRegion: function onImmediateHalftoneRegion(region, referredSegments, data, start, end) {1238      var patterns = this.patterns[referredSegments[0]];1239      var regionInfo = region.info;1240      var decodingContext = new DecodingContext(data, start, end);1241      var bitmap = decodeHalftoneRegion(region.mmr, patterns, region.template, regionInfo.width, regionInfo.height, region.defaultPixelValue, region.enableSkip, region.combinationOperator, region.gridWidth, region.gridHeight, region.gridOffsetX, region.gridOffsetY, region.gridVectorX, region.gridVectorY, decodingContext);1242      this.drawBitmap(regionInfo, bitmap);1243    },1244    onImmediateLosslessHalftoneRegion: function onImmediateLosslessHalftoneRegion() {1245      this.onImmediateHalftoneRegion.apply(this, arguments);1246    }1247  };1248  function Jbig2Image() {}1249  Jbig2Image.prototype = {1250    parseChunks: function Jbig2Image_parseChunks(chunks) {1251      return parseJbig2Chunks(chunks);1252    }1253  };1254  return Jbig2Image;1255}();...

Using AI Code Generation

1var wptools = require('wptools');2var fs = require('fs');3fs.readFile('test.png', function(err, data) {4    if (err) throw err;5    var buffer = new Buffer(data);6    var result = wptools.decodeHalftoneRegion(buffer, 0, 0, 100, 100);7    console.log(result);8});9var wptools = require('wptools');10var fs = require('fs');11fs.readFile('test.png', function(err, data) {12    if (err) throw err;13    var buffer = new Buffer(data);14    var result = wptools.decodeHalftoneRegion(buffer, 0, 0, 100, 100);15    console.log(result);16});17var wptools = require('wptools');18var fs = require('fs');19fs.readFile('test.png', function(err, data) {20    if (err) throw err;21    var buffer = new Buffer(data);22    var result = wptools.decodeHalftoneRegion(buffer, 0, 0, 100, 100);23    console.log(result);24});25var wptools = require('wptools');26var fs = require('fs');27fs.readFile('test.png', function(err, data) {28    if (err) throw err;29    var buffer = new Buffer(data);30    var result = wptools.decodeHalftoneRegion(buffer, 0, 0, 100, 100);31    console.log(result);32});33var wptools = require('wptools');34var fs = require('fs');35fs.readFile('test.png', function(err, data) {36    if (err) throw err;

Using AI Code Generation

1const wptools = require('wp-tools');2const fs = require('fs');3const halftone = fs.readFileSync('test.png');4wptools.decodeHalftoneRegion(halftone, 0, 0, 0, 0, (err, result) => {5    console.log(result);6});7const wptools = require('wp-tools');8const fs = require('fs');9const halftone = fs.readFileSync('test.png');10wptools.decodeHalftone(halftone, (err, result) => {11    console.log(result);12});13const wptools = require('wp-tools');14const fs = require('fs');15const halftone = fs.readFileSync('test.png');16wptools.decodeHalftone(halftone, {threshold: 0.8}, (err, result) => {17    console.log(result);18});19const wptools = require('wp-tools');20const fs = require('fs');21const halftone = fs.readFileSync('test.png');22wptools.decodeHalftone(halftone, {threshold: 0.8, regionWidth: 50, regionHeight: 50}, (err, result) => {23    console.log(result);24});25const wptools = require('wp-tools');26const fs = require('fs');27const halftone = fs.readFileSync('test.png');28wptools.decodeHalftone(halftone, {threshold: 0.8, regionWidth: 20, regionHeight: 20}, (err, result) => {29    console.log(result);30});

Using AI Code Generation

1var wptools = require('wptools');2var fs = require('fs');3var data = fs.readFileSync('test.png');4wptools.decodeHalftoneRegion(data, function(err, res) {5    if(err) {6        console.log(err);7    } else {8        console.log(res);9    }10});11var wptools = require('wptools');12var fs = require('fs');13var data = fs.readFileSync('test.png');14wptools.decodeHalftoneRegion(data, function(err, res) {15    if(err) {16        console.log(err);17    } else {18        console.log(res);19    }20});21var wptools = require('wptools');22var fs = require('fs');23var data = fs.readFileSync('test.png');24wptools.decodeHalftoneRegion(data, function(err, res) {25    if(err) {26        console.log(err);27    } else {28        console.log(res);29    }30});31var wptools = require('wptools');32var fs = require('fs');33var data = fs.readFileSync('test.png');34wptools.decodeHalftoneRegion(data, function(err, res) {35    if(err) {36        console.log(err);37    } else {38        console.log(res);39    }40});41var wptools = require('wptools');42var fs = require('fs');43var data = fs.readFileSync('test.png');44wptools.decodeHalftoneRegion(data, function(err, res) {45    if(err) {46        console.log(err);47    } else {48        console.log(res);49    }50});51var wptools = require('

Using AI Code Generation

1var fs = require('fs');2var path = require('path');3var PDFJS = require('pdfjs-dist');4var data = fs.readFileSync(path.join(__dirname, 'sample.pdf'));5var dataBuffer = new Uint8Array(data).buffer;6PDFJS.getDocument(dataBuffer).then(function(pdf) {7    pdf.getPage(1).then(function(page) {8        var viewport = page.getViewport(1);9        var canvas = document.createElement('canvas');10        var context = canvas.getContext('2d');11        var renderContext = {12        };13        page.render(renderContext).then(function() {14            var imageData = context.getImageData(0, 0, canvas.width, canvas.height);15            var wptextdecoder = new PDFJS.WPTextDecoder();16            var text = wptextdecoder.decodeHalftoneRegion(imageData, 0, 0, canvas.width, canvas.height);17            console.log(text);18        });19    });20});

Using AI Code Generation

1var fs = require('fs');2var WpTextDecoder = require('wptextdecoder');3var wptextdecoder = new WpTextDecoder();4var data = fs.readFileSync('test.txt');5var buffer = new Buffer(data, 'binary');6var result = wptextdecoder.decodeHalftoneRegion(buffer, 0, 0, 0, 0, 0, 0, 0);7console.log(result);

Using AI Code Generation

1var wptools = require('wptools');2var halftoneRegion = {3    "halftone": {4        "halftoneScreen": {5        },6        "halftoneDotShape": {7        },8        "halftoneDotShape": {9        }10    },

Using AI Code Generation

1var script = document.createElement('script');2script.src = 'wptDecoder.js';3script.type = 'text/javascript';4document.getElementsByTagName('head')[0].appendChild(script);5var script = document.createElement('script');6script.src = 'wptDecoder.wasm';7script.type = 'text/javascript';8document.getElementsByTagName('head')[0].appendChild(script);9var xhr = new XMLHttpRequest();10xhr.open('GET', 'test.png');11xhr.responseType = 'blob';12xhr.onload = function(e) {13  var blob = xhr.response;14  var reader = new FileReader();15  reader.onload = function(e) {16    var img = new Image();17    img.onload = function(e) {18      var canvas = document.createElement('canvas');19      canvas.width = img.width;20      canvas.height = img.height;21      var ctx = canvas.getContext('2d');22      ctx.drawImage(img, 0, 0);23      var data = ctx.getImageData(0, 0, img.width, img.height).data;

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.