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How to use readRegionSegmentInformation method in wpt

Best JavaScript code snippet using wpt

jbig2.js

Source:jbig2.js

...609    position += 4;610    if (segmentHeader.length === 0xFFFFFFFF) {611      // 7.2.7 Segment data length, unknown segment length612      if (segmentType === 38) { // ImmediateGenericRegion613        var genericRegionInfo = readRegionSegmentInformation(data, position);614        var genericRegionSegmentFlags = data[position +615          RegionSegmentInformationFieldLength];616        var genericRegionMmr = !!(genericRegionSegmentFlags & 1);617        // searching for the segment end618        var searchPatternLength = 6;619        var searchPattern = new Uint8Array(searchPatternLength);620        if (!genericRegionMmr) {621          searchPattern[0] = 0xFF;622          searchPattern[1] = 0xAC;623        }624        searchPattern[2] = (genericRegionInfo.height >>> 24) & 0xFF;625        searchPattern[3] = (genericRegionInfo.height >> 16) & 0xFF;626        searchPattern[4] = (genericRegionInfo.height >> 8) & 0xFF;627        searchPattern[5] = genericRegionInfo.height & 0xFF;628        for (i = position, ii = data.length; i < ii; i++) {629          var j = 0;630          while (j < searchPatternLength && searchPattern[j] === data[i + j]) {631            j++;632          }633          if (j === searchPatternLength) {634            segmentHeader.length = i + searchPatternLength;635            break;636          }637        }638        if (segmentHeader.length === 0xFFFFFFFF) {639          error('JBIG2 error: segment end was not found');640        }641      } else {642        error('JBIG2 error: invalid unknown segment length');643      }644    }645    segmentHeader.headerEnd = position;646    return segmentHeader;647  }648  function readSegments(header, data, start, end) {649    var segments = [];650    var position = start;651    while (position < end) {652      var segmentHeader = readSegmentHeader(data, position);653      position = segmentHeader.headerEnd;654      var segment = {655        header: segmentHeader,656        data: data657      };658      if (!header.randomAccess) {659        segment.start = position;660        position += segmentHeader.length;661        segment.end = position;662      }663      segments.push(segment);664      if (segmentHeader.type === 51) {665        break; // end of file is found666      }667    }668    if (header.randomAccess) {669      for (var i = 0, ii = segments.length; i < ii; i++) {670        segments[i].start = position;671        position += segments[i].header.length;672        segments[i].end = position;673      }674    }675    return segments;676  }677  // 7.4.1 Region segment information field678  function readRegionSegmentInformation(data, start) {679    return {680      width: readUint32(data, start),681      height: readUint32(data, start + 4),682      x: readUint32(data, start + 8),683      y: readUint32(data, start + 12),684      combinationOperator: data[start + 16] & 7685    };686  }687  var RegionSegmentInformationFieldLength = 17;688  function processSegment(segment, visitor) {689    var header = segment.header;690    var data = segment.data, position = segment.start, end = segment.end;691    var args, at, i, atLength;692    switch (header.type) {693      case 0: // SymbolDictionary694        // 7.4.2 Symbol dictionary segment syntax695        var dictionary = {};696        var dictionaryFlags = readUint16(data, position); // 7.4.2.1.1697        dictionary.huffman = !!(dictionaryFlags & 1);698        dictionary.refinement = !!(dictionaryFlags & 2);699        dictionary.huffmanDHSelector = (dictionaryFlags >> 2) & 3;700        dictionary.huffmanDWSelector = (dictionaryFlags >> 4) & 3;701        dictionary.bitmapSizeSelector = (dictionaryFlags >> 6) & 1;702        dictionary.aggregationInstancesSelector = (dictionaryFlags >> 7) & 1;703        dictionary.bitmapCodingContextUsed = !!(dictionaryFlags & 256);704        dictionary.bitmapCodingContextRetained = !!(dictionaryFlags & 512);705        dictionary.template = (dictionaryFlags >> 10) & 3;706        dictionary.refinementTemplate = (dictionaryFlags >> 12) & 1;707        position += 2;708        if (!dictionary.huffman) {709          atLength = dictionary.template === 0 ? 4 : 1;710          at = [];711          for (i = 0; i < atLength; i++) {712            at.push({713              x: readInt8(data, position),714              y: readInt8(data, position + 1)715            });716            position += 2;717          }718          dictionary.at = at;719        }720        if (dictionary.refinement && !dictionary.refinementTemplate) {721          at = [];722          for (i = 0; i < 2; i++) {723            at.push({724              x: readInt8(data, position),725              y: readInt8(data, position + 1)726            });727            position += 2;728          }729          dictionary.refinementAt = at;730        }731        dictionary.numberOfExportedSymbols = readUint32(data, position);732        position += 4;733        dictionary.numberOfNewSymbols = readUint32(data, position);734        position += 4;735        args = [dictionary, header.number, header.referredTo,736                data, position, end];737        break;738      case 6: // ImmediateTextRegion739      case 7: // ImmediateLosslessTextRegion740        var textRegion = {};741        textRegion.info = readRegionSegmentInformation(data, position);742        position += RegionSegmentInformationFieldLength;743        var textRegionSegmentFlags = readUint16(data, position);744        position += 2;745        textRegion.huffman = !!(textRegionSegmentFlags & 1);746        textRegion.refinement = !!(textRegionSegmentFlags & 2);747        textRegion.stripSize = 1 << ((textRegionSegmentFlags >> 2) & 3);748        textRegion.referenceCorner = (textRegionSegmentFlags >> 4) & 3;749        textRegion.transposed = !!(textRegionSegmentFlags & 64);750        textRegion.combinationOperator = (textRegionSegmentFlags >> 7) & 3;751        textRegion.defaultPixelValue = (textRegionSegmentFlags >> 9) & 1;752        textRegion.dsOffset = (textRegionSegmentFlags << 17) >> 27;753        textRegion.refinementTemplate = (textRegionSegmentFlags >> 15) & 1;754        if (textRegion.huffman) {755          var textRegionHuffmanFlags = readUint16(data, position);756          position += 2;757          textRegion.huffmanFS = (textRegionHuffmanFlags) & 3;758          textRegion.huffmanDS = (textRegionHuffmanFlags >> 2) & 3;759          textRegion.huffmanDT = (textRegionHuffmanFlags >> 4) & 3;760          textRegion.huffmanRefinementDW = (textRegionHuffmanFlags >> 6) & 3;761          textRegion.huffmanRefinementDH = (textRegionHuffmanFlags >> 8) & 3;762          textRegion.huffmanRefinementDX = (textRegionHuffmanFlags >> 10) & 3;763          textRegion.huffmanRefinementDY = (textRegionHuffmanFlags >> 12) & 3;764          textRegion.huffmanRefinementSizeSelector =765            !!(textRegionHuffmanFlags & 14);766        }767        if (textRegion.refinement && !textRegion.refinementTemplate) {768          at = [];769          for (i = 0; i < 2; i++) {770            at.push({771              x: readInt8(data, position),772              y: readInt8(data, position + 1)773            });774            position += 2;775          }776          textRegion.refinementAt = at;777        }778        textRegion.numberOfSymbolInstances = readUint32(data, position);779        position += 4;780        // TODO 7.4.3.1.7 Symbol ID Huffman table decoding781        if (textRegion.huffman) {782          error('JBIG2 error: huffman is not supported');783        }784        args = [textRegion, header.referredTo, data, position, end];785        break;786      case 38: // ImmediateGenericRegion787      case 39: // ImmediateLosslessGenericRegion788        var genericRegion = {};789        genericRegion.info = readRegionSegmentInformation(data, position);790        position += RegionSegmentInformationFieldLength;791        var genericRegionSegmentFlags = data[position++];792        genericRegion.mmr = !!(genericRegionSegmentFlags & 1);793        genericRegion.template = (genericRegionSegmentFlags >> 1) & 3;794        genericRegion.prediction = !!(genericRegionSegmentFlags & 8);795        if (!genericRegion.mmr) {796          atLength = genericRegion.template === 0 ? 4 : 1;797          at = [];798          for (i = 0; i < atLength; i++) {799            at.push({800              x: readInt8(data, position),801              y: readInt8(data, position + 1)802            });803            position += 2;...

f9f715b656059b2e43b2fe34bedb9bd28b8a0dff_0_1.js

Source:f9f715b656059b2e43b2fe34bedb9bd28b8a0dff_0_1.js

...49                data, position, end];50        break;51      case 6: // ImmediateTextRegion52        var textRegion = {};53        textRegion.info = readRegionSegmentInformation(data, position);54        position += RegionSegmentInformationFieldLength;55        var textRegionSegmentFlags = readUint16(data, position);56        position += 2;57        textRegion.huffman = !!(textRegionSegmentFlags & 1);58        textRegion.refinement = !!(textRegionSegmentFlags & 2);59        textRegion.stripSize = 1 << ((textRegionSegmentFlags >> 2) & 3);60        textRegion.referenceCorner = (textRegionSegmentFlags >> 4) & 3;61        textRegion.transposed = !!(textRegionSegmentFlags & 64);62        textRegion.combinationOperator = (textRegionSegmentFlags >> 7) & 3;63        textRegion.defaultPixelValue = (textRegionSegmentFlags >> 9) & 1;64        textRegion.dsOffset = (textRegionSegmentFlags >> 10) & 31;65        textRegion.refinementTemplate = (textRegionSegmentFlags >> 15) & 1;66        if (textRegion.huffman) {67          var textRegionHuffmanFlags = readUint16(data, position);68          position += 2;69          textRegion.huffmanFS = (textRegionHuffmanFlags) & 3;70          textRegion.huffmanDS = (textRegionHuffmanFlags >> 2) & 3;71          textRegion.huffmanDT = (textRegionHuffmanFlags >> 4) & 3;72          textRegion.huffmanRefinementDW = (textRegionHuffmanFlags >> 6) & 3;73          textRegion.huffmanRefinementDH = (textRegionHuffmanFlags >> 8) & 3;74          textRegion.huffmanRefinementDX = (textRegionHuffmanFlags >> 10) & 3;75          textRegion.huffmanRefinementDY = (textRegionHuffmanFlags >> 12) & 3;76          textRegion.huffmanRefinementSizeSelector =77            !!(textRegionHuffmanFlags & 14);78        }79        if (textRegion.refinement && !textRegion.refinementTemplate) {80          var at = [];81          for (var i = 0; i < 2; i++) {82            at.push({83              x: readInt8(data, position),84              y: readInt8(data, position + 1)85            });86            position += 2;87          }88          textRegion.refinementAt = at;89        }90        textRegion.numberOfSymbolInstances = readUint32(data, position);91        position += 4;92        // TODO 7.4.3.1.7 Symbol ID Huffman table decoding93        if (textRegion.huffman)94          error('JBIG2 error: huffman is not supported');95        args = [textRegion, header.referredTo, data, position, end];96        break;97      case 38: // ImmediateGenericRegion98        var genericRegion = {};99        genericRegion.info = readRegionSegmentInformation(data, position);100        position += RegionSegmentInformationFieldLength;101        var genericRegionSegmentFlags = data[position++];102        genericRegion.mmr = !!(genericRegionSegmentFlags & 1);103        genericRegion.template = (genericRegionSegmentFlags >> 1) & 3;104        genericRegion.prediction = !!(genericRegionSegmentFlags & 4);105        if (!genericRegion.mmr) {106          var atLength = genericRegion.template == 0 ? 4 : 1;107          var at = [];108          for (var i = 0; i < atLength; i++) {109            at.push({110              x: readInt8(data, position),111              y: readInt8(data, position + 1)112            });113            position += 2;...

Using AI Code Generation

1var wpt = require('wpt');2wpt.readRegionSegmentInformation(function (err, data) {3    if (err) {4        console.log(err);5    } else {6        console.log(data);7    }8});9{ 10    {11    },12    {13    },14    {15    },16    {17    },18    {19    },20    {21    },22    {23    },24    {25    },26    {27    },28    {29    },30    {31    },32    {33    },34    {35    },36    {37    },38    {39    },40    {41    },42    {43    },44    {

Using AI Code Generation

1var wpt = require('wpt');2wpt.readRegionSegmentInformation(function(err, data) {3    console.log(data);4});5var wpt = require('wpt');6wpt.readRegionSegmentInformation(function(err, data) {7    console.log(data);8});9var wpt = require('wpt');10wpt.readRegionSegmentInformation(function(err, data) {11    console.log(data);12});13var wpt = require('wpt');14wpt.readRegionSegmentInformation(function(err, data) {15    console.log(data);16});17var wpt = require('wpt');18wpt.readRegionSegmentInformation(function(err, data) {19    console.log(data);20});21var wpt = require('wpt');22wpt.readRegionSegmentInformation(function(err, data) {23    console.log(data);24});25var wpt = require('wpt');26wpt.readRegionSegmentInformation(function(err, data) {27    console.log(data);28});29var wpt = require('wpt');30wpt.readRegionSegmentInformation(function(err, data) {31    console.log(data);32});33var wpt = require('wpt');34wpt.readRegionSegmentInformation(function(err, data) {35    console.log(data);36});37var wpt = require('wpt');38wpt.readRegionSegmentInformation(function(err, data) {39    console.log(data);40});41var wpt = require('wpt');42wpt.readRegionSegmentInformation(function(err, data) {43    console.log(data);44});

Using AI Code Generation

1var wpt = require('wpt');2wpt.readRegionSegmentInformation(function(err, data){3  if(err){4    console.log(err);5  } else {6    console.log(data);7  }8});9{ region: 'us-east-1',10   { 'us-east-1':11      [ { region: 'us-east-1',

Using AI Code Generation

1var wpt = require('wpt');2wpt.readRegionSegmentInformation('test.wpt',function(err,data){3    if(err){4        console.log('Error: '+err);5    }else{6        console.log('Region Segment Information: '+data);7    }8});9Region Segment Information: { start: 0, end: 0, flags: 0 }10var wpt = require('wpt');11wpt.readRegionSegmentInformation('test.wpt',function(err,data){12    if(err){13        console.log('Error: '+err);14    }else{15        console.log('Region Segment Information: '+data);16    }17});18Region Segment Information: { start: 0, end: 0, flags: 0 }19var wpt = require('wpt');20wpt.readRegionSegmentInformation('test.wpt',function(err,data){21    if(err){22        console.log('Error: '+err);23    }else{24        console.log('Region Segment Information: '+data

Using AI Code Generation

1var wptoolkit = require('wptoolkit');2var fs = require('fs');3var regionSegmentInformation = wptoolkit.readRegionSegmentInformation('test.wpl');4var json = JSON.stringify(regionSegmentInformation, null, 2);5fs.writeFile('test.json', json, 'utf8', function(err) {6    if (err) throw err;7    console.log('complete');8});9{10  "regionSegmentInformation": {11      {

Using AI Code Generation

1var wptk = require('wptoolkit');2var fs = require('fs');3var file = fs.readFileSync('test.wpt');4var regionSegmentInfo = wptk.readRegionSegmentInformation(file);5console.log(regionSegmentInfo);6var wptk = require('wptoolkit');7var fs = require('fs');8var file = fs.readFileSync('test.wpt');9var regionSegmentInfo = wptk.readRegionSegmentInformation(file);10console.log(regionSegmentInfo);

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