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How to use parseJbig2Chunks method in wpt

Best JavaScript code snippet using wpt

jbig2.js

...868    var segments = readSegments(header, data, position, end);869    error('Not implemented');870    // processSegments(segments, new SimpleSegmentVisitor());871  }872  function parseJbig2Chunks(chunks) {873    var visitor = new SimpleSegmentVisitor();874    for (var i = 0, ii = chunks.length; i < ii; i++) {875      var chunk = chunks[i];876      var segments = readSegments({}, chunk.data, chunk.start, chunk.end);877      processSegments(segments, visitor);878    }879    return visitor.buffer;880  }881  function SimpleSegmentVisitor() {}882  SimpleSegmentVisitor.prototype = {883    onPageInformation: function SimpleSegmentVisitor_onPageInformation(info) {884      this.currentPageInfo = info;885      var rowSize = (info.width + 7) >> 3;886      var buffer = new Uint8Array(rowSize * info.height);887      // The contents of ArrayBuffers are initialized to 0.888      // Fill the buffer with 0xFF only if info.defaultPixelValue is set889      if (info.defaultPixelValue) {890        for (var i = 0, ii = buffer.length; i < ii; i++) {891          buffer[i] = 0xFF;892        }893      }894      this.buffer = buffer;895    },896    drawBitmap: function SimpleSegmentVisitor_drawBitmap(regionInfo, bitmap) {897      var pageInfo = this.currentPageInfo;898      var width = regionInfo.width, height = regionInfo.height;899      var rowSize = (pageInfo.width + 7) >> 3;900      var combinationOperator = pageInfo.combinationOperatorOverride ?901        regionInfo.combinationOperator : pageInfo.combinationOperator;902      var buffer = this.buffer;903      var mask0 =  128 >> (regionInfo.x & 7);904      var offset0 = regionInfo.y * rowSize + (regionInfo.x >> 3);905      var i, j, mask, offset;906      switch (combinationOperator) {907        case 0: // OR908          for (i = 0; i < height; i++) {909            mask = mask0;910            offset = offset0;911            for (j = 0; j < width; j++) {912              if (bitmap[i][j]) {913                buffer[offset] |= mask;914              }915              mask >>= 1;916              if (!mask) {917                mask = 128;918                offset++;919              }920            }921            offset0 += rowSize;922          }923        break;924        case 2: // XOR925          for (i = 0; i < height; i++) {926            mask = mask0;927            offset = offset0;928            for (j = 0; j < width; j++) {929              if (bitmap[i][j]) {930                buffer[offset] ^= mask;931              }932              mask >>= 1;933              if (!mask) {934                mask = 128;935                offset++;936              }937            }938            offset0 += rowSize;939          }940          break;941        default:942          error('JBIG2 error: operator ' + combinationOperator +943                ' is not supported');944      }945    },946    onImmediateGenericRegion:947      function SimpleSegmentVisitor_onImmediateGenericRegion(region, data,948                                                             start, end) {949      var regionInfo = region.info;950      var decodingContext = new DecodingContext(data, start, end);951      var bitmap = decodeBitmap(region.mmr, regionInfo.width, regionInfo.height,952                                region.template, region.prediction, null,953                                region.at, decodingContext);954      this.drawBitmap(regionInfo, bitmap);955    },956    onImmediateLosslessGenericRegion:957      function SimpleSegmentVisitor_onImmediateLosslessGenericRegion() {958      this.onImmediateGenericRegion.apply(this, arguments);959    },960    onSymbolDictionary:961      function SimpleSegmentVisitor_onSymbolDictionary(dictionary,962                                                       currentSegment,963                                                       referredSegments,964                                                       data, start, end) {965      var huffmanTables;966      if (dictionary.huffman) {967        error('JBIG2 error: huffman is not supported');968      }969      // Combines exported symbols from all referred segments970      var symbols = this.symbols;971      if (!symbols) {972        this.symbols = symbols = {};973      }974      var inputSymbols = [];975      for (var i = 0, ii = referredSegments.length; i < ii; i++) {976        inputSymbols = inputSymbols.concat(symbols[referredSegments[i]]);977      }978      var decodingContext = new DecodingContext(data, start, end);979      symbols[currentSegment] = decodeSymbolDictionary(dictionary.huffman,980        dictionary.refinement, inputSymbols, dictionary.numberOfNewSymbols,981        dictionary.numberOfExportedSymbols, huffmanTables,982        dictionary.template, dictionary.at,983        dictionary.refinementTemplate, dictionary.refinementAt,984        decodingContext);985    },986    onImmediateTextRegion:987      function SimpleSegmentVisitor_onImmediateTextRegion(region,988                                                          referredSegments,989                                                          data, start, end) {990      var regionInfo = region.info;991      var huffmanTables;992      // Combines exported symbols from all referred segments993      var symbols = this.symbols;994      var inputSymbols = [];995      for (var i = 0, ii = referredSegments.length; i < ii; i++) {996        inputSymbols = inputSymbols.concat(symbols[referredSegments[i]]);997      }998      var symbolCodeLength = log2(inputSymbols.length);999      var decodingContext = new DecodingContext(data, start, end);1000      var bitmap = decodeTextRegion(region.huffman, region.refinement,1001        regionInfo.width, regionInfo.height, region.defaultPixelValue,1002        region.numberOfSymbolInstances, region.stripSize, inputSymbols,1003        symbolCodeLength, region.transposed, region.dsOffset,1004        region.referenceCorner, region.combinationOperator, huffmanTables,1005        region.refinementTemplate, region.refinementAt, decodingContext);1006      this.drawBitmap(regionInfo, bitmap);1007    },1008    onImmediateLosslessTextRegion:1009      function SimpleSegmentVisitor_onImmediateLosslessTextRegion() {1010      this.onImmediateTextRegion.apply(this, arguments);1011    }1012  };1013  function Jbig2Image() {}1014  Jbig2Image.prototype = {1015    parseChunks: function Jbig2Image_parseChunks(chunks) {1016      return parseJbig2Chunks(chunks);1017    }1018  };1019  return Jbig2Image;...

Using AI Code Generation

1var wptools = require('wptools');2var fs = require('fs');3var path = require('path');4var PDFParser = require("pdf2json");5var pdfParser = new PDFParser(this,1);6var pdfFilePath = path.join(__dirname, "test.pdf");7var pdfFilePath = path.join(__dirname, "test.pdf");8pdfParser.on("pdfParser_dataError", errData => console.error(errData.parserError) );9pdfParser.on("pdfParser_dataReady", pdfData => {10    var pdfData = pdfParser.getRawTextContent();11    var text = pdfData.replace(/(\r\n|\n|\r)/gm,"");12    var pdfBuffer = Buffer.from(text, 'base64');13    var chunks = wptools.parseJbig2Chunks(pdfBuffer);14    console.log(chunks);15})

Using AI Code Generation

1const parseJbig2Chunks = require('wptools').parseJbig2Chunks;2const fs = require('fs');3const path = require('path');4const file = fs.readFileSync(path.join(__dirname,'jbig2chunks.jb2'));5const chunks = parseJbig2Chunks(file);6console.log(chunks);

Using AI Code Generation

1var wptools = require('wptools');2var fs = require('fs');3var buf = fs.readFileSync('test.jbig2');4var chunks = wptools.parseJbig2Chunks(buf);5console.log(chunks);6console.log(chunks[0].text);7console.log(chunks[1].text);8console.log(chunks[2].text);9console.log(chunks[3].text);10console.log(chunks[4].text);11console.log(chunks[5].text);12console.log(chunks[6].text);13console.log(chunks[7].text);14console.log(chunks[8].text);15console.log(chunks[9].text);16console.log(chunks[10].text);17console.log(chunks[11].text);18console.log(chunks[12].text);19console.log(chunks[13].text);20console.log(chunks[14].text);21console.log(chunks[15].text);22console.log(chunks[16].text);23console.log(chunks[17].text);24console.log(chunks[18].text);25console.log(chunks[19].text);26console.log(chunks[20].text);27console.log(chunks[21].text);28console.log(chunks[22].text);29console.log(chunks[23].text);30console.log(chunks[24].text);31console.log(chunks[25].text

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