How to use convertImgDataToPng method in wpt

Best JavaScript code snippet using wpt

pdfjs.js

Source:pdfjs.js

1const util = require('pdfjs-dist/lib/shared/util');2const isNodeJS = require('pdfjs-dist/lib/shared/is_node');3const zlib = require('zlib');4const ImageKind = util.ImageKind;5/**6 * See pdf.js/src/display/svg.js7 */8const convertImgDataToPng = (() => {9  const PNG_HEADER =10    new Uint8Array([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]);11  const CHUNK_WRAPPER_SIZE = 12;12  const crcTable = new Int32Array(256);13  for (let i = 0; i < 256; i++) {14    let c = i;15    for (let h = 0; h < 8; h++) {16      if (c & 1) {17        c = 0xedB88320 ^ ((c >> 1) & 0x7fffffff);18      } else {19        c = (c >> 1) & 0x7fffffff;20      }21    }22    crcTable[i] = c;23  }24  function crc32 (data, start, end) {25    let crc = -1;26    for (let i = start; i < end; i++) {27      const a = (crc ^ data[i]) & 0xff;28      const b = crcTable[a];29      crc = (crc >>> 8) ^ b;30    }31    return crc ^ -1;32  }33  function writePngChunk (type, body, data, offset) {34    let p = offset;35    const len = body.length;36    data[p] = len >> 24 & 0xff;37    data[p + 1] = len >> 16 & 0xff;38    data[p + 2] = len >> 8 & 0xff;39    data[p + 3] = len & 0xff;40    p += 4;41    data[p] = type.charCodeAt(0) & 0xff;42    data[p + 1] = type.charCodeAt(1) & 0xff;43    data[p + 2] = type.charCodeAt(2) & 0xff;44    data[p + 3] = type.charCodeAt(3) & 0xff;45    p += 4;46    data.set(body, p);47    p += body.length;48    const crc = crc32(data, offset + 4, p);49    data[p] = crc >> 24 & 0xff;50    data[p + 1] = crc >> 16 & 0xff;51    data[p + 2] = crc >> 8 & 0xff;52    data[p + 3] = crc & 0xff;53  }54  function adler32 (data, start, end) {55    let a = 1;56    let b = 0;57    for (let i = start; i < end; ++i) {58      a = (a + (data[i] & 0xff)) % 65521;59      b = (b + a) % 65521;60    }61    return (b << 16) | a;62  }63  /**64   * @param {Uint8Array} literals The input data.65   * @returns {Uint8Array} The DEFLATE-compressed data stream in zlib format.66   *   This is the required format for compressed streams in the PNG format:67   *   http://www.libpng.org/pub/png/spec/1.2/PNG-Compression.html68   */69  function deflateSync (literals) {70    if (!isNodeJS()) {71      // zlib is certainly not available outside of Node.js. We can either use72      // the pako library for client-side DEFLATE compression, or use the canvas73      // API of the browser to obtain a more optimal PNG file.74      return deflateSyncUncompressed(literals);75    }76    try {77      // NOTE: This implementation is far from perfect, but already way better78      // than not applying any compression.79      //80      // A better algorithm will try to choose a good predictor/filter and81      // then choose a suitable zlib compression strategy (e.g. 3,Z_RLE).82      //83      // Node v0.11.12 zlib.deflateSync is introduced (and returns a Buffer).84      // Node v3.0.0   Buffer inherits from Uint8Array.85      // Node v8.0.0   zlib.deflateSync accepts Uint8Array as input.86      let input;87      // eslint-disable-next-line no-undef88      if (parseInt(process.versions.node) >= 8) {89        input = literals;90      } else {91        // eslint-disable-next-line no-undef92        // input = new Buffer(literals);93        input = Buffer.from(literals);94      }95      // const output = __non_webpack_require__('zlib')96      const output = zlib97        .deflateSync(input, { level: 9 });98      return output instanceof Uint8Array ? output : new Uint8Array(output);99    } catch (e) {100      console.warn('Not compressing PNG because zlib.deflateSync is unavailable: ' + e);101    }102    return deflateSyncUncompressed(literals);103  }104  // An implementation of DEFLATE with compression level 0 (Z_NO_COMPRESSION).105  function deflateSyncUncompressed (literals) {106    let len = literals.length;107    const maxBlockLength = 0xFFFF;108    const deflateBlocks = Math.ceil(len / maxBlockLength);109    const idat = new Uint8Array(2 + len + deflateBlocks * 5 + 4);110    let pi = 0;111    idat[pi++] = 0x78; // compression method and flags112    idat[pi++] = 0x9c; // flags113    let pos = 0;114    while (len > maxBlockLength) {115      // writing non-final DEFLATE blocks type 0 and length of 65535116      idat[pi++] = 0x00;117      idat[pi++] = 0xff;118      idat[pi++] = 0xff;119      idat[pi++] = 0x00;120      idat[pi++] = 0x00;121      idat.set(literals.subarray(pos, pos + maxBlockLength), pi);122      pi += maxBlockLength;123      pos += maxBlockLength;124      len -= maxBlockLength;125    }126    // writing non-final DEFLATE blocks type 0127    idat[pi++] = 0x01;128    idat[pi++] = len & 0xff;129    idat[pi++] = len >> 8 & 0xff;130    idat[pi++] = (~len & 0xffff) & 0xff;131    idat[pi++] = (~len & 0xffff) >> 8 & 0xff;132    idat.set(literals.subarray(pos), pi);133    pi += literals.length - pos;134    const adler = adler32(literals, 0, literals.length); // checksum135    idat[pi++] = adler >> 24 & 0xff;136    idat[pi++] = adler >> 16 & 0xff;137    idat[pi++] = adler >> 8 & 0xff;138    idat[pi++] = adler & 0xff;139    return idat;140  }141  function encode (imgData, kind, forceDataSchema, isMask) {142    const width = imgData.width;143    const height = imgData.height;144    let bitDepth, colorType, lineSize;145    const bytes = imgData.data;146    switch (kind) {147      case ImageKind.GRAYSCALE_1BPP:148        colorType = 0;149        bitDepth = 1;150        lineSize = (width + 7) >> 3;151        break;152      case ImageKind.RGB_24BPP:153        colorType = 2;154        bitDepth = 8;155        lineSize = width * 3;156        break;157      case ImageKind.RGBA_32BPP:158        colorType = 6;159        bitDepth = 8;160        lineSize = width * 4;161        break;162      default:163        throw new Error('invalid format');164    }165    // prefix every row with predictor 0166    const literals = new Uint8Array((1 + lineSize) * height);167    let offsetLiterals = 0;168    let offsetBytes = 0;169    for (let y = 0; y < height; ++y) {170      literals[offsetLiterals++] = 0; // no prediction171      literals.set(bytes.subarray(offsetBytes, offsetBytes + lineSize),172        offsetLiterals);173      offsetBytes += lineSize;174      offsetLiterals += lineSize;175    }176    if (kind === ImageKind.GRAYSCALE_1BPP && isMask) {177      // inverting for image masks178      offsetLiterals = 0;179      for (let y = 0; y < height; y++) {180        offsetLiterals++; // skipping predictor181        for (let i = 0; i < lineSize; i++) {182          literals[offsetLiterals++] ^= 0xFF;183        }184      }185    }186    const ihdr = new Uint8Array([187      width >> 24 & 0xff,188      width >> 16 & 0xff,189      width >> 8 & 0xff,190      width & 0xff,191      height >> 24 & 0xff,192      height >> 16 & 0xff,193      height >> 8 & 0xff,194      height & 0xff,195      bitDepth, // bit depth196      colorType, // color type197      0x00, // compression method198      0x00, // filter method199      0x00, // interlace method200    ]);201    const idat = deflateSync(literals);202    // PNG consists of: header, IHDR+data, IDAT+data, and IEND.203    const pngLength = PNG_HEADER.length + (CHUNK_WRAPPER_SIZE * 3) +204      ihdr.length + idat.length;205    const data = new Uint8Array(pngLength);206    let offset = 0;207    data.set(PNG_HEADER, offset);208    offset += PNG_HEADER.length;209    writePngChunk('IHDR', ihdr, data, offset);210    offset += CHUNK_WRAPPER_SIZE + ihdr.length;211    writePngChunk('IDATA', idat, data, offset);212    offset += CHUNK_WRAPPER_SIZE + idat.length;213    writePngChunk('IEND', new Uint8Array(0), data, offset);214    return data;215    // return util.createObjectURL(data, 'image/png', forceDataSchema);216  }217  return function convertImgDataToPng (imgData, forceDataSchema, isMask) {218    const kind = (imgData.kind === undefined ? ImageKind.GRAYSCALE_1BPP : imgData.kind);219    return encode(imgData, kind, forceDataSchema, isMask);220  };221})();222module.exports = {223  convertImgDataToPng,...

helpers.js

Source:helpers.js

...70    default:71      return { colorType: 0, bitDepth: 1, lineSize: (width + 7) >> 3 };72  }73}74function convertImgDataToPng(imgData, isMask) {75  const kind = imgData.kind || 1;76  const { width, height } = imgData;77  const bytes = imgData.data;78  const { bitDepth, colorType, lineSize } = getKindParams(kind, width);79  const literals = new Uint8Array((1 + lineSize) * height);80  let offsetLiterals = 0;81  let offsetBytes = 0;82  for (let y = 0; y < height; y += 1) {83    literals[offsetLiterals] = 0;84    offsetLiterals += 1;85    literals.set(86      bytes.subarray(offsetBytes, offsetBytes + lineSize),87      offsetLiterals88    );...

paintImageXObject.ts

Source:paintImageXObject.ts

...32      logger.warn(`Image ${objectId} was not previously loaded`);33      return null;34    }35    const { height, width } = imgData;36    const imageData = convertImgDataToPng(imgData, false);37    return {38      type: 'image',39      data: {40        imageData,41        objectId,42        height,43        width,44        transform: OperationState.state.transformMatrix,45      },46    };47  },...

Using AI Code Generation

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

Using AI Code Generation

1var wptools = require('wptools');2var fs = require('fs');3var imgData = fs.readFileSync('test.png', 'base64');4wptools.convertImgDataToPng(imgData, function (err, data) {5    if (err) {6        console.log(err);7    } else {8        console.log(data);9    }10});

Using AI Code Generation

1const wptools = require('wptools')2import {convertImgDataToPng} from 'wptools'3const {convertImgDataToPng} = require('wptools')4const wptools = require('wptools')5const {convertImgDataToPng} = wptools6import wptools from 'wptools'7const {convertImgDataToPng} = wptools8const wptools = require('wptools')9const {convertImgDataToPng} = wptools10const wptools = require('wptools')11const {convertImgDataToPng} = wptools12const wptools = require('wptools')13const {convertImgDataToPng} = wptools14const wptools = require('wptools')15const {convertImgDataToPng} = wptools16const wptools = require('wptools')17const {convertImgData

Using AI Code Generation

1var wptoolkit = require('wptoolkit');2var fs = require('fs');3var imgData = fs.readFileSync('input.png');4var pngData = wptoolkit.convertImgDataToPng(imgData, 300, 300, 96, 96);5fs.writeFileSync('output.png', pngData);6convertImgDataToPng(imgData, width, height, dpiX, dpiY, callback)7function(err, pngData) { }8var wptoolkit = require('wptoolkit');9var fs = require('fs');10var imgData = fs.readFileSync('input.png');11wptoolkit.convertImgDataToPng(imgData, 300, 300, 96, 96, function(err, pngData) {12    if (err) {13        console.log('Error: ' + err.message);14    }15    else {16        fs.writeFileSync('output.png', pngData);17    }18});

Using AI Code Generation

1var wptools = require('wptools');2var fs = require('fs');3var data = fs.readFileSync('test.png');4var img = wptools.convertImgDataToPng(data);5fs.writeFileSync('test2.png', img);6var wptools = require('wptools');7var fs = require('fs');8var data = fs.readFileSync('test2.png');9var img = wptools.convertImgDataToPng(data);10fs.writeFileSync('test3.png', img);11var wptools = require('wptools');12var fs = require('fs');13var data = fs.readFileSync('test3.png');14var img = wptools.convertImgDataToPng(data);15fs.writeFileSync('test4.png', img);16var wptools = require('wptools');17var fs = require('fs');18var data = fs.readFileSync('test4.png');19var img = wptools.convertImgDataToPng(data);20fs.writeFileSync('test5.png', img);21var wptools = require('wptools');22var fs = require('fs');23var data = fs.readFileSync('test5.png');24var img = wptools.convertImgDataToPng(data);25fs.writeFileSync('test6.png', img);26var wptools = require('wptools');27var fs = require('fs');28var data = fs.readFileSync('test6.png');29var img = wptools.convertImgDataToPng(data);30fs.writeFileSync('test7.png', img);31var wptools = require('wptools');32var fs = require('fs');33var data = fs.readFileSync('test7.png');34var img = wptools.convertImgDataToPng(data);35fs.writeFileSync('test8.png', img);

Using AI Code Generation

1const wptools = require('wptools');2const fs = require('fs');3const convertImgDataToPng = wptools.convertImgDataToPng;4const imgData = fs.readFileSync('test.jpg', 'base64');5convertImgDataToPng(imgData, (err, pngData) => {6  if (err) {7    console.log(err);8  } else {9    console.log(pngData);10  }11});

Using AI Code Generation

1var wptoolkit = require('wptoolkit');2var fs = require('fs');3var imgData = fs.readFileSync('test.png');4var pngImgData = wptoolkit.convertImgDataToPng(imgData);5fs.writeFileSync('test.png', pngImgData);6var wptoolkit = require('wptoolkit');7var fs = require('fs');8var imgData = fs.readFileSync('test.png');9var jpegImgData = wptoolkit.convertImgDataToJpeg(imgData);10fs.writeFileSync('test.jpg', jpegImgData);11var wptoolkit = require('wptoolkit');12var fs = require('fs');13var imgData = fs.readFileSync('test.png');14var webpImgData = wptoolkit.convertImgDataToWebp(imgData);15fs.writeFileSync('test.webp', webpImgData);16var wptoolkit = require('wptoolkit');17var fs = require('fs');18var imgData = fs.readFileSync('test.png');19var tiffImgData = wptoolkit.convertImgDataToTiff(imgData);20fs.writeFileSync('test.tiff', tiffImgData);21var wptoolkit = require('wptoolkit');22var fs = require('fs');23var imgData = fs.readFileSync('test.png');24var bmpImgData = wptoolkit.convertImgDataToBmp(imgData);25fs.writeFileSync('test.bmp', bmpImgData);26var wptoolkit = require('wptool

Using AI Code Generation

1I have tried to use the convertImgDataToPng and convertImgDataToJpg methods of wptools. It works fine when I use it in a single file. But when I try to use it in a different file, it throws an error saying "ReferenceError: convertImgDataToPng is not defined". I have tried to import the module using require and import but it still throws the same error. What am I doing wrong?2async function getImage(url) {3    const page = await wptools.page(url).get()4    const image = await page.getImage()5}6"engines": {7  }

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