How to use decodeType6Shading method in wpt

Best JavaScript code snippet using wpt

pattern.js

Source:pattern.js

...437      colors: figureColors,438      verticesPerRow: verticesPerRow439    };440  }441  function decodeType6Shading(mesh, reader) {442    // A special case of Type 7. The p11, p12, p21, p22 automatically filled443    var coords = mesh.coords;444    var colors = mesh.colors;445    var ps = new Int32Array(16); // p00, p10, ..., p30, p01, ..., p33446    var cs = new Int32Array(4); // c00, c30, c03, c33447    while (reader.hasData) {448      var f = reader.readFlag();449      assert(0 <= f && f <= 3, 'Unknown type6 flag');450      var i, ii;451      var pi = coords.length;452      for (i = 0, ii = (f !== 0 ? 8 : 12); i < ii; i++) {453        coords.push(reader.readCoordinate());454      }455      var ci = colors.length;456      for (i = 0, ii = (f !== 0 ? 2 : 4); i < ii; i++) {457        colors.push(reader.readComponents());458      }459      var tmp1, tmp2, tmp3, tmp4;460      switch (f) {461        case 0:462          ps[12] = pi + 3; ps[13] = pi + 4;  ps[14] = pi + 5;  ps[15] = pi + 6;463          ps[ 8] = pi + 2; /* values for 5, 6, 9, 10 are    */ ps[11] = pi + 7;464          ps[ 4] = pi + 1; /* calculated below              */ ps[ 7] = pi + 8;465          ps[ 0] = pi;     ps[ 1] = pi + 11; ps[ 2] = pi + 10; ps[ 3] = pi + 9;466          cs[2] = ci + 1; cs[3] = ci + 2;467          cs[0] = ci;     cs[1] = ci + 3;468          break;469        case 1:470          tmp1 = ps[12]; tmp2 = ps[13]; tmp3 = ps[14]; tmp4 = ps[15];471          ps[12] = pi + 5; ps[13] = pi + 4;  ps[14] = pi + 3;  ps[15] = pi + 2;472          ps[ 8] = pi + 6; /* values for 5, 6, 9, 10 are    */ ps[11] = pi + 1;473          ps[ 4] = pi + 7; /* calculated below              */ ps[ 7] = pi;474          ps[ 0] = tmp1;   ps[ 1] = tmp2;    ps[ 2] = tmp3;    ps[ 3] = tmp4;475          tmp1 = cs[2]; tmp2 = cs[3];476          cs[2] = ci + 1; cs[3] = ci;477          cs[0] = tmp1;   cs[1] = tmp2;478          break;479        case 2:480          ps[12] = ps[15]; ps[13] = pi + 7; ps[14] = pi + 6;   ps[15] = pi + 5;481          ps[ 8] = ps[11]; /* values for 5, 6, 9, 10 are    */ ps[11] = pi + 4;482          ps[ 4] = ps[7];  /* calculated below              */ ps[ 7] = pi + 3;483          ps[ 0] = ps[3];  ps[ 1] = pi;     ps[ 2] = pi + 1;   ps[ 3] = pi + 2;484          cs[2] = cs[3]; cs[3] = ci + 1;485          cs[0] = cs[1]; cs[1] = ci;486          break;487        case 3:488          ps[12] = ps[0];  ps[13] = ps[1];   ps[14] = ps[2];   ps[15] = ps[3];489          ps[ 8] = pi;     /* values for 5, 6, 9, 10 are    */ ps[11] = pi + 7;490          ps[ 4] = pi + 1; /* calculated below              */ ps[ 7] = pi + 6;491          ps[ 0] = pi + 2; ps[ 1] = pi + 3;  ps[ 2] = pi + 4;  ps[ 3] = pi + 5;492          cs[2] = cs[0]; cs[3] = cs[1];493          cs[0] = ci;    cs[1] = ci + 1;494          break;495      }496      // set p11, p12, p21, p22497      ps[5] = coords.length;498      coords.push([499        (-4 * coords[ps[0]][0] - coords[ps[15]][0] +500          6 * (coords[ps[4]][0] + coords[ps[1]][0]) -501          2 * (coords[ps[12]][0] + coords[ps[3]][0]) +502          3 * (coords[ps[13]][0] + coords[ps[7]][0])) / 9,503        (-4 * coords[ps[0]][1] - coords[ps[15]][1] +504          6 * (coords[ps[4]][1] + coords[ps[1]][1]) -505          2 * (coords[ps[12]][1] + coords[ps[3]][1]) +506          3 * (coords[ps[13]][1] + coords[ps[7]][1])) / 9507      ]);508      ps[6] = coords.length;509      coords.push([510        (-4 * coords[ps[3]][0] - coords[ps[12]][0] +511          6 * (coords[ps[2]][0] + coords[ps[7]][0]) -512          2 * (coords[ps[0]][0] + coords[ps[15]][0]) +513          3 * (coords[ps[4]][0] + coords[ps[14]][0])) / 9,514        (-4 * coords[ps[3]][1] - coords[ps[12]][1] +515          6 * (coords[ps[2]][1] + coords[ps[7]][1]) -516          2 * (coords[ps[0]][1] + coords[ps[15]][1]) +517          3 * (coords[ps[4]][1] + coords[ps[14]][1])) / 9518      ]);519      ps[9] = coords.length;520      coords.push([521        (-4 * coords[ps[12]][0] - coords[ps[3]][0] +522          6 * (coords[ps[8]][0] + coords[ps[13]][0]) -523          2 * (coords[ps[0]][0] + coords[ps[15]][0]) +524          3 * (coords[ps[11]][0] + coords[ps[1]][0])) / 9,525        (-4 * coords[ps[12]][1] - coords[ps[3]][1] +526          6 * (coords[ps[8]][1] + coords[ps[13]][1]) -527          2 * (coords[ps[0]][1] + coords[ps[15]][1]) +528          3 * (coords[ps[11]][1] + coords[ps[1]][1])) / 9529      ]);530      ps[10] = coords.length;531      coords.push([532        (-4 * coords[ps[15]][0] - coords[ps[0]][0] +533          6 * (coords[ps[11]][0] + coords[ps[14]][0]) -534          2 * (coords[ps[12]][0] + coords[ps[3]][0]) +535          3 * (coords[ps[2]][0] + coords[ps[8]][0])) / 9,536        (-4 * coords[ps[15]][1] - coords[ps[0]][1] +537          6 * (coords[ps[11]][1] + coords[ps[14]][1]) -538          2 * (coords[ps[12]][1] + coords[ps[3]][1]) +539          3 * (coords[ps[2]][1] + coords[ps[8]][1])) / 9540      ]);541      mesh.figures.push({542        type: 'patch',543        coords: new Int32Array(ps), // making copies of ps and cs544        colors: new Int32Array(cs)545      });546    }547  }548  function decodeType7Shading(mesh, reader) {549    var coords = mesh.coords;550    var colors = mesh.colors;551    var ps = new Int32Array(16); // p00, p10, ..., p30, p01, ..., p33552    var cs = new Int32Array(4); // c00, c30, c03, c33553    while (reader.hasData) {554      var f = reader.readFlag();555      assert(0 <= f && f <= 3, 'Unknown type7 flag');556      var i, ii;557      var pi = coords.length;558      for (i = 0, ii = (f !== 0 ? 12 : 16); i < ii; i++) {559        coords.push(reader.readCoordinate());560      }561      var ci = colors.length;562      for (i = 0, ii = (f !== 0 ? 2 : 4); i < ii; i++) {563        colors.push(reader.readComponents());564      }565      var tmp1, tmp2, tmp3, tmp4;566      switch (f) {567        case 0:568          ps[12] = pi + 3; ps[13] = pi + 4;  ps[14] = pi + 5;  ps[15] = pi + 6;569          ps[ 8] = pi + 2; ps[ 9] = pi + 13; ps[10] = pi + 14; ps[11] = pi + 7;570          ps[ 4] = pi + 1; ps[ 5] = pi + 12; ps[ 6] = pi + 15; ps[ 7] = pi + 8;571          ps[ 0] = pi;     ps[ 1] = pi + 11; ps[ 2] = pi + 10; ps[ 3] = pi + 9;572          cs[2] = ci + 1; cs[3] = ci + 2;573          cs[0] = ci;     cs[1] = ci + 3;574          break;575        case 1:576          tmp1 = ps[12]; tmp2 = ps[13]; tmp3 = ps[14]; tmp4 = ps[15];577          ps[12] = pi + 5; ps[13] = pi + 4;  ps[14] = pi + 3;  ps[15] = pi + 2;578          ps[ 8] = pi + 6; ps[ 9] = pi + 11; ps[10] = pi + 10; ps[11] = pi + 1;579          ps[ 4] = pi + 7; ps[ 5] = pi + 8;  ps[ 6] = pi + 9;  ps[ 7] = pi;580          ps[ 0] = tmp1;   ps[ 1] = tmp2;    ps[ 2] = tmp3;    ps[ 3] = tmp4;581          tmp1 = cs[2]; tmp2 = cs[3];582          cs[2] = ci + 1; cs[3] = ci;583          cs[0] = tmp1;   cs[1] = tmp2;584          break;585        case 2:586          ps[12] = ps[15]; ps[13] = pi + 7; ps[14] = pi + 6;  ps[15] = pi + 5;587          ps[ 8] = ps[11]; ps[ 9] = pi + 8; ps[10] = pi + 11; ps[11] = pi + 4;588          ps[ 4] = ps[7];  ps[ 5] = pi + 9; ps[ 6] = pi + 10; ps[ 7] = pi + 3;589          ps[ 0] = ps[3];  ps[ 1] = pi;     ps[ 2] = pi + 1;  ps[ 3] = pi + 2;590          cs[2] = cs[3]; cs[3] = ci + 1;591          cs[0] = cs[1]; cs[1] = ci;592          break;593        case 3:594          ps[12] = ps[0];  ps[13] = ps[1];   ps[14] = ps[2];   ps[15] = ps[3];595          ps[ 8] = pi;     ps[ 9] = pi + 9;  ps[10] = pi + 8;  ps[11] = pi + 7;596          ps[ 4] = pi + 1; ps[ 5] = pi + 10; ps[ 6] = pi + 11; ps[ 7] = pi + 6;597          ps[ 0] = pi + 2; ps[ 1] = pi + 3;  ps[ 2] = pi + 4;  ps[ 3] = pi + 5;598          cs[2] = cs[0]; cs[3] = cs[1];599          cs[0] = ci;    cs[1] = ci + 1;600          break;601      }602      mesh.figures.push({603        type: 'patch',604        coords: new Int32Array(ps), // making copies of ps and cs605        colors: new Int32Array(cs)606      });607    }608  }609  function updateBounds(mesh) {610    var minX = mesh.coords[0][0], minY = mesh.coords[0][1],611      maxX = minX, maxY = minY;612    for (var i = 1, ii = mesh.coords.length; i < ii; i++) {613      var x = mesh.coords[i][0], y = mesh.coords[i][1];614      minX = minX > x ? x : minX;615      minY = minY > y ? y : minY;616      maxX = maxX < x ? x : maxX;617      maxY = maxY < y ? y : maxY;618    }619    mesh.bounds = [minX, minY, maxX, maxY];620  }621  function packData(mesh) {622    var i, ii, j, jj;623    var coords = mesh.coords;624    var coordsPacked = new Float32Array(coords.length * 2);625    for (i = 0, j = 0, ii = coords.length; i < ii; i++) {626      var xy = coords[i];627      coordsPacked[j++] = xy[0];628      coordsPacked[j++] = xy[1];629    }630    mesh.coords = coordsPacked;631    var colors = mesh.colors;632    var colorsPacked = new Uint8Array(colors.length * 3);633    for (i = 0, j = 0, ii = colors.length; i < ii; i++) {634      var c = colors[i];635      colorsPacked[j++] = c[0];636      colorsPacked[j++] = c[1];637      colorsPacked[j++] = c[2];638    }639    mesh.colors = colorsPacked;640    var figures = mesh.figures;641    for (i = 0, ii = figures.length; i < ii; i++) {642      var figure = figures[i], ps = figure.coords, cs = figure.colors;643      for (j = 0, jj = ps.length; j < jj; j++) {644        ps[j] *= 2;645        cs[j] *= 3;646      }647    }648  }649  function Mesh(stream, matrix, xref, res) {650    assert(isStream(stream), 'Mesh data is not a stream');651    var dict = stream.dict;652    this.matrix = matrix;653    this.shadingType = dict.get('ShadingType');654    this.type = 'Pattern';655    this.bbox = dict.get('BBox');656    var cs = dict.get('ColorSpace', 'CS');657    cs = ColorSpace.parse(cs, xref, res);658    this.cs = cs;659    this.background = dict.has('Background') ?660      cs.getRgb(dict.get('Background'), 0) : null;661    var fnObj = dict.get('Function');662    var fn = fnObj ? PDFFunction.parseArray(xref, fnObj) : null;663    this.coords = [];664    this.colors = [];665    this.figures = [];666    var decodeContext = {667      bitsPerCoordinate: dict.get('BitsPerCoordinate'),668      bitsPerComponent: dict.get('BitsPerComponent'),669      bitsPerFlag: dict.get('BitsPerFlag'),670      decode: dict.get('Decode'),671      colorFn: fn,672      colorSpace: cs,673      numComps: fn ? 1 : cs.numComps674    };675    var reader = new MeshStreamReader(stream, decodeContext);676    var patchMesh = false;677    switch (this.shadingType) {678      case PatternType.FREE_FORM_MESH:679        decodeType4Shading(this, reader);680        break;681      case PatternType.LATTICE_FORM_MESH:682        var verticesPerRow = dict.get('VerticesPerRow') | 0;683        assert(verticesPerRow >= 2, 'Invalid VerticesPerRow');684        decodeType5Shading(this, reader, verticesPerRow);685        break;686      case PatternType.COONS_PATCH_MESH:687        decodeType6Shading(this, reader);688        patchMesh = true;689        break;690      case PatternType.TENSOR_PATCH_MESH:691        decodeType7Shading(this, reader);692        patchMesh = true;693        break;694      default:695        error('Unsupported mesh type.');696        break;697    }698    if (patchMesh) {699      // dirty bounds calculation for determining, how dense shall be triangles700      updateBounds(this);701      for (var i = 0, ii = this.figures.length; i < ii; i++) {...

Using AI Code Generation

1var wptools = require('./wptools.js');2var fs = require('fs');3var buffer = fs.readFileSync('test.pdf');4var result = wptools.decodeType6Shading(buffer);5console.log(result);6var wptools = {};7wptools.decodeType6Shading = function(buffer){8    var result = {};9    result.type = "Type6Shading";10    result.function = {};11    result.function.type = "Type2Function";12    result.function.c0 = buffer.readFloatBE(0);13    result.function.c1 = buffer.readFloatBE(4);14    result.function.n = buffer.readFloatBE(8);15    result.coords = [];16    var coords = {};17    coords.x0 = buffer.readFloatBE(12);18    coords.y0 = buffer.readFloatBE(16);19    coords.r0 = buffer.readFloatBE(20);20    coords.x1 = buffer.readFloatBE(24);21    coords.y1 = buffer.readFloatBE(28);22    coords.r1 = buffer.readFloatBE(32);23    result.coords = coords;24    return result;25};26module.exports = wptools;27var shading = new Shading();28var shadingDict = shading.getShadingDict();29console.log(shadingDict);30{ Type: 'Shading',31  Extend: [ false, false ] }32var shading = new Shading();

Using AI Code Generation

1var wptools = require('./wptools.js');2var fs = require('fs');3var input = fs.readFileSync('test.pdf');4var output = wptools.decodeType6Shading(input);5console.log(output);6var Type6Shading = function (data) {7    this.data = data;8    this.read = function (offset) {9        var result = {};10        result.ColorSpace = this.data.readUInt16LE(offset);11        offset += 2;12        result.Function = this.data.readUInt16LE(offset);13        offset += 2;14        result.X0 = this.data.readUInt32LE(offset);15        offset += 4;16        result.Y0 = this.data.readUInt32LE(offset);17        offset += 4;18        result.X1 = this.data.readUInt32LE(offset);19        offset += 4;20        result.Y1 = this.data.readUInt32LE(offset);21        offset += 4;22        result.T0 = this.data.readUInt32LE(offset);23        offset += 4;24        result.T1 = this.data.readUInt32LE(offset);25        offset += 4;26        result.Matrix = [];27        for (var i = 0; i < 6; i++) {28            result.Matrix.push(this.data.readUInt32LE(offset));29            offset += 4;30        }31        result.BitsPerCoordinate = this.data.readUInt8(offset);32        offset += 1;33        result.BitsPerComponent = this.data.readUInt8(offset);34        offset += 1;35        result.BitsPerFlag = this.data.readUInt8(offset);36        offset += 1;37        result.Decode = [];38        for (var i = 0; i < 8; i++) {39            result.Decode.push(this.data.readUInt32LE(offset));40            offset += 4;41        }42        result.Colors = [];43        var colorCount = this.data.readUInt32LE(offset);44        offset += 4;45        for (var i = 0; i < colorCount; i++) {46            result.Colors.push(this.data.readUInt16LE(offset));47            offset += 2;48        }49        result.Length = this.data.readUInt32LE(offset);50        offset += 4;51        result.Data = this.data.slice(offset, offset + result.Length);52        return result;53    }54};

Using AI Code Generation

1var wptools = require('./wptools.js');2var fs = require('fs');3var pdfFile = fs.readFileSync('test.pdf');4var pdf = wptools.parsePDF(pdfFile);5var page = pdf.getPage(1);6var shading = page.getShading(1);7console.log(wptools.decodeType6Shading(shading));8console.log(wptools.decodeType6Shading(shading)[0]);9console.log(wptools.decodeType6Shading(shading)[1]);10console.log(wptools.decodeType6Shading(shading)[2]);11console.log(wptools.decodeType6Shading(shading)[3]);12console.log(wptools.decodeType6Shading(shading)[4]);13console.log(wptools.decodeType6Shading(shading)[5]);14console.log(wptools.decodeType6Shading(shading)[6]);15console.log(wptools.decodeType6Shading(shading)[7]);16console.log(wptools.decodeType6Shading(shading)[8]);17console.log(wptools.decodeType6Shading(shading)[9]);18console.log(wptools.decodeType6Shading(shading)[10]);19console.log(wptools.decodeType6Shading(shading)[11]);20console.log(wptools.decodeType6Shading(shading)[12]);21console.log(wptools.decodeType6Shading(shading)[13]);22console.log(wptools.decodeType6Shading(shading)[14]);23console.log(wptools.decodeType6Shading(shading)[15]);24console.log(wptools.decodeType6Shading(shading)[16]);25console.log(wptools.decodeType6Shading(shading)[17]);26console.log(wptools.decodeType6Shading(shading)[18]);27console.log(wptools.decodeType6Shading(shading)[19]);28console.log(wptools.decodeType6Shading(shading)[20]);29console.log(wptools.decodeType6Shading(shading)[21]);30console.log(wptools.decodeType6Shading(shading)[22]);31console.log(wptools.decodeType6Shading(shading)[23]);32console.log(wptools.decodeType6Shading(shading)[24]);33console.log(wptools.decodeType6Shading(shading)[25]);34console.log(wptools.decodeType6Shading(shading)[26]);35console.log(wptools.decodeType6Shading(shading)[27]);36console.log(wptools

Using AI Code Generation

1var fs = require('fs');2var wptools = require('./wptools.js');3var file = fs.readFileSync('shadingtype6.txt');4var shading = wptools.decodeType6Shading(file);5console.log(shading);6var fs = require(‘fs’);7var wptools = require(‘./wptools.js’);8var file = fs.readFileSync(‘shadingtype6.txt’);9var shading = wptools.decodeType6Shading(file);10console.log(shading);11var fs = require(‘fs’);12var wptools = require(‘./wptools.js’);13var file = fs.readFileSync(‘shadingtype6.txt’);14var shading = wptools.decodeType6Shading(file);15console.log(shading);16var fs = require(‘fs’);17var wptools = require(‘./wptools.js’);18var file = fs.readFileSync(‘shadingtype6.txt’);19var shading = wptools.decodeType6Shading(file);20console.log(shading);

Using AI Code Generation

1var wptextstream = require('wptextstream');2var fs = require('fs');3var stream = fs.createReadStream('test.pdf');4var wpts = new wptextstream();5wpts.on('decodeType6Shading', function (data) {6    console.log(data);7});8stream.pipe(wpts);9var wptextstream = require('wptextstream');10var fs = require('fs');11var stream = fs.createReadStream('test.pdf');12var wpts = new wptextstream();13wpts.on('decodeType7Shading', function (data) {14    console.log(data);15});16stream.pipe(wpts);17var wptextstream = require('wptextstream');18var fs = require('fs');19var stream = fs.createReadStream('test.pdf');

Using AI Code Generation

1var pdfDoc = new PDFDoc("input.pdf");2var page = pdfDoc.getPage(1);3var contents = page.getContents();4var wptextstream = contents.getTextStream();5var stream = wptextstream.getStream();6var resources = contents.getResources();7var xobject = resources.getXObject();8var pattern = resources.getPattern();9var decodeType6Shading = wptextstream.decodeType6Shading(stream, xobject, pattern);10console.log(decodeType6Shading);11var pdfDoc = new PDFDoc("input.pdf");12var page = pdfDoc.getPage(1);13var contents = page.getContents();14var wptextstream = contents.getTextStream();15var stream = wptextstream.getStream();16var resources = contents.getResources();17var xobject = resources.getXObject();18var pattern = resources.getPattern();19var decodeType4Shading = wptextstream.decodeType4Shading(stream, xobject, pattern);20console.log(decodeType4Shading);21var pdfDoc = new PDFDoc("input.pdf");22var page = pdfDoc.getPage(1);23var contents = page.getContents();24var wptextstream = contents.getTextStream();25var stream = wptextstream.getStream();26var resources = contents.getResources();27var xobject = resources.getXObject();28var pattern = resources.getPattern();29var decodeType2Shading = wptextstream.decodeType2Shading(stream, xobject, pattern);30console.log(decodeType2Shading);31var pdfDoc = new PDFDoc("input.pdf");32var page = pdfDoc.getPage(1);33var contents = page.getContents();34var wptextstream = contents.getTextStream();35var stream = wptextstream.getStream();36var resources = contents.getResources();37var xobject = resources.getXObject();38var pattern = resources.getPattern();39var decodeType3Shading = wptextstream.decodeType3Shading(stream, xobject, pattern);40console.log(decodeType3Shading);

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