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How to use drawGrayPixel method in Playwright Internal

Best JavaScript code snippet using playwright-internal

background.js

Source:background.js

...405    if (a32[i] !== b32[i]) { identical = false; break; }406  }407  if (identical) { // fast path if identical408    if (output && !options.diffMask) {409      for (let i = 0; i < len; i++) drawGrayPixel(img1, 4 * i, options.alpha, output);410    }411    return 0;412  }413  // maximum acceptable square distance between two colors;414  // 35215 is the maximum possible value for the YIQ difference metric415  const maxDelta = 35215 * options.threshold * options.threshold;416  let diff = 0;417  const [aaR, aaG, aaB] = options.aaColor;418  const [diffR, diffG, diffB] = options.diffColor;419  // compare each pixel of one image against the other one420  for (let y = 0; y < height; y++) {421    for (let x = 0; x < width; x++) {422      const pos = (y * width + x) * 4;423      // squared YUV distance between colors at this pixel position424      const delta = colorDelta(img1, img2, pos, pos);425      // the color difference is above the threshold426      if (delta > maxDelta) {427        // check it's a real rendering difference or just anti-aliasing428        if (!options.includeAA && (antialiased(img1, x, y, width, height, img2) ||429          antialiased(img2, x, y, width, height, img1))) {430          // one of the pixels is anti-aliasing; draw as yellow and do not count as difference431          // note that we do not include such pixels in a mask432          if (output && !options.diffMask) drawPixel(output, pos, aaR, aaG, aaB);433        } else {434          // found substantial difference not caused by anti-aliasing; draw it as red435          if (output) {436            drawPixel(output, pos, diffR, diffG, diffB);437            diff++;438          }439        }440      } else if (output) {441        // pixels are similar; draw background as grayscale image blended with white442        if (!options.diffMask) drawGrayPixel(img1, pos, options.alpha, output);443      }444    }445  }446  // return the number of different pixels447  return diff;448}449function isPixelData(arr) {450  // work around instanceof Uint8Array not working properly in some Jest environments451  return ArrayBuffer.isView(arr) && arr.constructor.BYTES_PER_ELEMENT === 1;452}453// check if a pixel is likely a part of anti-aliasing;454// based on "Anti-aliased Pixel and Intensity Slope Detector" paper by V. Vysniauskas, 2009455function antialiased(img, x1, y1, width, height, img2) {456  const x0 = Math.max(x1 - 1, 0);457  const y0 = Math.max(y1 - 1, 0);458  const x2 = Math.min(x1 + 1, width - 1);459  const y2 = Math.min(y1 + 1, height - 1);460  const pos = (y1 * width + x1) * 4;461  let zeroes = x1 === x0 || x1 === x2 || y1 === y0 || y1 === y2 ? 1 : 0;462  let min = 0;463  let max = 0;464  let minX, minY, maxX, maxY;465  // go through 8 adjacent pixels466  for (let x = x0; x <= x2; x++) {467    for (let y = y0; y <= y2; y++) {468      if (x === x1 && y === y1) continue;469      // brightness delta between the center pixel and adjacent one470      const delta = colorDelta(img, img, pos, (y * width + x) * 4, true);471      // count the number of equal, darker and brighter adjacent pixels472      if (delta === 0) {473        zeroes++;474        // if found more than 2 equal siblings, it's definitely not anti-aliasing475        if (zeroes > 2) return false;476        // remember the darkest pixel477      } else if (delta < min) {478        min = delta;479        minX = x;480        minY = y;481        // remember the brightest pixel482      } else if (delta > max) {483        max = delta;484        maxX = x;485        maxY = y;486      }487    }488  }489  // if there are no both darker and brighter pixels among siblings, it's not anti-aliasing490  if (min === 0 || max === 0) return false;491  // if either the darkest or the brightest pixel has 3+ equal siblings in both images492  // (definitely not anti-aliased), this pixel is anti-aliased493  return (hasManySiblings(img, minX, minY, width, height) && hasManySiblings(img2, minX, minY, width, height)) ||494    (hasManySiblings(img, maxX, maxY, width, height) && hasManySiblings(img2, maxX, maxY, width, height));495}496// check if a pixel has 3+ adjacent pixels of the same color.497function hasManySiblings(img, x1, y1, width, height) {498  const x0 = Math.max(x1 - 1, 0);499  const y0 = Math.max(y1 - 1, 0);500  const x2 = Math.min(x1 + 1, width - 1);501  const y2 = Math.min(y1 + 1, height - 1);502  const pos = (y1 * width + x1) * 4;503  let zeroes = x1 === x0 || x1 === x2 || y1 === y0 || y1 === y2 ? 1 : 0;504  // go through 8 adjacent pixels505  for (let x = x0; x <= x2; x++) {506    for (let y = y0; y <= y2; y++) {507      if (x === x1 && y === y1) continue;508      const pos2 = (y * width + x) * 4;509      if (img[pos] === img[pos2] &&510        img[pos + 1] === img[pos2 + 1] &&511        img[pos + 2] === img[pos2 + 2] &&512        img[pos + 3] === img[pos2 + 3]) zeroes++;513      if (zeroes > 2) return true;514    }515  }516  return false;517}518// calculate color difference according to the paper "Measuring perceived color difference519// using YIQ NTSC transmission color space in mobile applications" by Y. Kotsarenko and F. Ramos520function colorDelta(img1, img2, k, m, yOnly) {521  let r1 = img1[k + 0];522  let g1 = img1[k + 1];523  let b1 = img1[k + 2];524  let a1 = img1[k + 3];525  let r2 = img2[m + 0];526  let g2 = img2[m + 1];527  let b2 = img2[m + 2];528  let a2 = img2[m + 3];529  if (a1 === a2 && r1 === r2 && g1 === g2 && b1 === b2) return 0;530  if (a1 < 255) {531    a1 /= 255;532    r1 = blend(r1, a1);533    g1 = blend(g1, a1);534    b1 = blend(b1, a1);535  }536  if (a2 < 255) {537    a2 /= 255;538    r2 = blend(r2, a2);539    g2 = blend(g2, a2);540    b2 = blend(b2, a2);541  }542  const y = rgb2y(r1, g1, b1) - rgb2y(r2, g2, b2);543  if (yOnly) return y; // brightness difference only544  const i = rgb2i(r1, g1, b1) - rgb2i(r2, g2, b2);545  const q = rgb2q(r1, g1, b1) - rgb2q(r2, g2, b2);546  return 0.5053 * y * y + 0.299 * i * i + 0.1957 * q * q;547}548function rgb2y(r, g, b) { return r * 0.29889531 + g * 0.58662247 + b * 0.11448223; }549function rgb2i(r, g, b) { return r * 0.59597799 - g * 0.27417610 - b * 0.32180189; }550function rgb2q(r, g, b) { return r * 0.21147017 - g * 0.52261711 + b * 0.31114694; }551// blend semi-transparent color with white552function blend(c, a) {553  return 255 + (c - 255) * a;554}555function drawPixel(output, pos, r, g, b) {556  output[pos + 0] = r;557  output[pos + 1] = g;558  output[pos + 2] = b;559  output[pos + 3] = 255;560}561function drawGrayPixel(img, i, alpha, output) {562  const r = img[i + 0];563  const g = img[i + 1];564  const b = img[i + 2];565  const val = blend(rgb2y(r, g, b), alpha * img[i + 3] / 255);566  drawPixel(output, i, val, val, val);567}568/******************************************************************/569/************* PIXELMATCH SOURCE CODE ENDS HERE  ******************/...

image.js

Source:image.js

...276      if (a32[i] !== b32[i]) { identical = false; break; }277  }278  if (identical) { // fast path if identical279      if (output && !options.diffMask) {280          for (let i = 0; i < len; i++) drawGrayPixel(img1, 4 * i, options.alpha, output);281      }282      return 0;283  }284  // maximum acceptable square distance between two colors;285  // 35215 is the maximum possible value for the YIQ difference metric286  const maxDelta = 35215 * options.threshold * options.threshold;287  let diff = 0;288  // compare each pixel of one image against the other one289  for (let y = 0; y < height; y++) {290      for (let x = 0; x < width; x++) {291          const pos = (y * width + x) * 4;292          // squared YUV distance between colors at this pixel position, negative if the img2 pixel is darker293          const delta = colorDelta(img1, img2, pos, pos);294          // the color difference is above the threshold295          if (Math.abs(delta) > maxDelta) {296              // check it's a real rendering difference or just anti-aliasing297              if (!options.includeAA && (antialiased(img1, x, y, width, height, img2) ||298                                         antialiased(img2, x, y, width, height, img1))) {299                  // one of the pixels is anti-aliasing; draw as yellow and do not count as difference300                  // note that we do not include such pixels in a mask301                  if (output && !options.diffMask) drawPixel(output, pos, ...options.aaColor);302              } else {303                  // found substantial difference not caused by anti-aliasing; draw it as such304                  if (output) {305                      drawPixel(output, pos, ...(delta < 0 && options.diffColorAlt || options.diffColor));306                  }307                  diff++;308              }309          } else if (output) {310              // pixels are similar; draw background as grayscale image blended with white311              if (!options.diffMask) drawGrayPixel(img1, pos, options.alpha, output);312          }313      }314  }315  // return the number of different pixels316  return diff;317}318function isPixelData(arr) {319  // work around instanceof Uint8Array not working properly in some Jest environments320  return ArrayBuffer.isView(arr) && arr.constructor.BYTES_PER_ELEMENT === 1;321}322// check if a pixel is likely a part of anti-aliasing;323// based on "Anti-aliased Pixel and Intensity Slope Detector" paper by V. Vysniauskas, 2009324function antialiased(img, x1, y1, width, height, img2) {325  const x0 = Math.max(x1 - 1, 0);326  const y0 = Math.max(y1 - 1, 0);327  const x2 = Math.min(x1 + 1, width - 1);328  const y2 = Math.min(y1 + 1, height - 1);329  const pos = (y1 * width + x1) * 4;330  let zeroes = x1 === x0 || x1 === x2 || y1 === y0 || y1 === y2 ? 1 : 0;331  let min = 0;332  let max = 0;333  let minX, minY, maxX, maxY;334  // go through 8 adjacent pixels335  for (let x = x0; x <= x2; x++) {336      for (let y = y0; y <= y2; y++) {337          if (x === x1 && y === y1) continue;338          // brightness delta between the center pixel and adjacent one339          const delta = colorDelta(img, img, pos, (y * width + x) * 4, true);340          // count the number of equal, darker and brighter adjacent pixels341          if (delta === 0) {342              zeroes++;343              // if found more than 2 equal siblings, it's definitely not anti-aliasing344              if (zeroes > 2) return false;345          // remember the darkest pixel346          } else if (delta < min) {347              min = delta;348              minX = x;349              minY = y;350          // remember the brightest pixel351          } else if (delta > max) {352              max = delta;353              maxX = x;354              maxY = y;355          }356      }357  }358  // if there are no both darker and brighter pixels among siblings, it's not anti-aliasing359  if (min === 0 || max === 0) return false;360  // if either the darkest or the brightest pixel has 3+ equal siblings in both images361  // (definitely not anti-aliased), this pixel is anti-aliased362  return (hasManySiblings(img, minX, minY, width, height) && hasManySiblings(img2, minX, minY, width, height)) ||363         (hasManySiblings(img, maxX, maxY, width, height) && hasManySiblings(img2, maxX, maxY, width, height));364}365// check if a pixel has 3+ adjacent pixels of the same color.366function hasManySiblings(img, x1, y1, width, height) {367  const x0 = Math.max(x1 - 1, 0);368  const y0 = Math.max(y1 - 1, 0);369  const x2 = Math.min(x1 + 1, width - 1);370  const y2 = Math.min(y1 + 1, height - 1);371  const pos = (y1 * width + x1) * 4;372  let zeroes = x1 === x0 || x1 === x2 || y1 === y0 || y1 === y2 ? 1 : 0;373  // go through 8 adjacent pixels374  for (let x = x0; x <= x2; x++) {375      for (let y = y0; y <= y2; y++) {376          if (x === x1 && y === y1) continue;377          const pos2 = (y * width + x) * 4;378          if (img[pos] === img[pos2] &&379              img[pos + 1] === img[pos2 + 1] &&380              img[pos + 2] === img[pos2 + 2] &&381              img[pos + 3] === img[pos2 + 3]) zeroes++;382          if (zeroes > 2) return true;383      }384  }385  return false;386}387// calculate color difference according to the paper "Measuring perceived color difference388// using YIQ NTSC transmission color space in mobile applications" by Y. Kotsarenko and F. Ramos389function colorDelta(img1, img2, k, m, yOnly) {390  let r1 = img1[k + 0];391  let g1 = img1[k + 1];392  let b1 = img1[k + 2];393  let a1 = img1[k + 3];394  let r2 = img2[m + 0];395  let g2 = img2[m + 1];396  let b2 = img2[m + 2];397  let a2 = img2[m + 3];398  if (a1 === a2 && r1 === r2 && g1 === g2 && b1 === b2) return 0;399  if (a1 < 255) {400      a1 /= 255;401      r1 = blend(r1, a1);402      g1 = blend(g1, a1);403      b1 = blend(b1, a1);404  }405  if (a2 < 255) {406      a2 /= 255;407      r2 = blend(r2, a2);408      g2 = blend(g2, a2);409      b2 = blend(b2, a2);410  }411  const y1 = rgb2y(r1, g1, b1);412  const y2 = rgb2y(r2, g2, b2);413  const y = y1 - y2;414  if (yOnly) return y; // brightness difference only415  const i = rgb2i(r1, g1, b1) - rgb2i(r2, g2, b2);416  const q = rgb2q(r1, g1, b1) - rgb2q(r2, g2, b2);417  const delta = 0.5053 * y * y + 0.299 * i * i + 0.1957 * q * q;418  // encode whether the pixel lightens or darkens in the sign419  return y1 > y2 ? -delta : delta;420}421function rgb2y(r, g, b) { return r * 0.29889531 + g * 0.58662247 + b * 0.11448223; }422function rgb2i(r, g, b) { return r * 0.59597799 - g * 0.27417610 - b * 0.32180189; }423function rgb2q(r, g, b) { return r * 0.21147017 - g * 0.52261711 + b * 0.31114694; }424// blend semi-transparent color with white425function blend(c, a) {426  return 255 + (c - 255) * a;427}428function drawPixel(output, pos, r, g, b) {429  output[pos + 0] = r;430  output[pos + 1] = g;431  output[pos + 2] = b;432  output[pos + 3] = 255;433}434function drawGrayPixel(img, i, alpha, output) {435  const r = img[i + 0];436  const g = img[i + 1];437  const b = img[i + 2];438  const val = blend(rgb2y(r, g, b), alpha * img[i + 3] / 255);439  drawPixel(output, i, val, val, val);440}441function resizeCanvasImage(canvas, img, max_width, max_height) {442  if (!canvas) {443    return444  }445  var width = canvas.width;446  var height = canvas.height;447  if (width > height) {448    if (width > max_width) {...

pixelmatch.js

Source:pixelmatch.js

...51    for (let i = 0; i < len; i++) {52        if (a32[i] !== b32[i]) { identical = false; break; }53    }54    if (identical) { // fast path if identical55        for (let i = 0; i < len; i++) drawGrayPixel(img1, 4 * i, options.alpha, output);56        return 0;57    }58    // maximum acceptable square distance between two colors;59    // 35215 is the maximum possible value for the YIQ difference metric60    const threshold2 = options.threshold * options.threshold;61    const maxDelta = 35215 * threshold2;62    let diff = 0;63    const [aaR, aaG, aaB] = options.aaColor;64    const [diffR, diffG, diffB] = options.diffColor;65    // let deltas = []66    // compare each pixel of one image against the other one67    for (let y = 0; y < height; y++) {68        for (let x = 0; x < width; x++) {69            const pos = (y * width + x) * 4;70            // squared YUV distance between colors at this pixel position71            let distance = colorDelta(img1, img2, pos, pos)72            let delta = 1 - (distance / 35215 / threshold2);73            // for display, we offer scaling74            let scaled_delta = Math.max(0, Math.min(1, delta));75            // deltas.push(scaled_delta)76            if (options.colorScale) {77              if (scaled_delta > 0.95)78                drawGrayPixel(img1, pos, options.alpha, output)79              else {80                let is_antialiased = antialiased(img1, x, y, width, height, img2) || antialiased(img2, x, y, width, height, img1);81                if (!options.includeAA && is_antialiased) {82                    drawPixel(output, pos, aaR, aaG, aaB);83                } else {84                  let color = rgb(interpolateInferno(scaled_delta))85                  drawPixel(output, pos, color.r, color.g, color.b);                    86                }87              }88              continue89            }90            // the color difference is above the threshold91            if (delta > maxDelta) {92                // check it's a real rendering difference or just anti-aliasing93                if (!options.includeAA && (antialiased(img1, x, y, width, height, img2) ||94                                           antialiased(img2, x, y, width, height, img1))) {95                    // one of the pixels is anti-aliasing; draw as yellow and do not count as difference96                    drawPixel(output, pos, aaR, aaG, aaB);97                } else {98                    // found substantial difference not caused by anti-aliasing; draw it as red99                    drawPixel(output, pos, diffR, diffG, diffB);100                    diff++;101                }102            } else {103                // pixels are similar; draw background as grayscale image blended with white104                drawGrayPixel(img1, pos, options.alpha, output);105            }106        }107    }108    // console.log(deltas)109    // console.log("min:", deltas.reduce((a, b) => Math.min(a,b),  10))110    // console.log("max:", deltas.reduce((a, b) => Math.max(a,b), -10))111    // return the number of different pixels112    return diff;113}114function isPixelData(arr) {115    // work around instanceof Uint8Array not working properly in some Jest environments116    return ArrayBuffer.isView(arr) && arr.constructor.BYTES_PER_ELEMENT === 1;117}118// check if a pixel is likely a part of anti-aliasing;119// based on "Anti-aliased Pixel and Intensity Slope Detector" paper by V. Vysniauskas, 2009120function antialiased(img, x1, y1, width, height, img2) {121    const x0 = Math.max(x1 - 1, 0);122    const y0 = Math.max(y1 - 1, 0);123    const x2 = Math.min(x1 + 1, width - 1);124    const y2 = Math.min(y1 + 1, height - 1);125    const pos = (y1 * width + x1) * 4;126    let zeroes = x1 === x0 || x1 === x2 || y1 === y0 || y1 === y2 ? 1 : 0;127    let min = 0;128    let max = 0;129    let minX, minY, maxX, maxY;130    // go through 8 adjacent pixels131    for (let x = x0; x <= x2; x++) {132        for (let y = y0; y <= y2; y++) {133            if (x === x1 && y === y1) continue;134            // brightness delta between the center pixel and adjacent one135            const delta = colorDelta(img, img, pos, (y * width + x) * 4, true);136            // count the number of equal, darker and brighter adjacent pixels137            if (delta === 0) {138                zeroes++;139                // if found more than 2 equal siblings, it's definitely not anti-aliasing140                if (zeroes > 2) return false;141            // remember the darkest pixel142            } else if (delta < min) {143                min = delta;144                minX = x;145                minY = y;146            // remember the brightest pixel147            } else if (delta > max) {148                max = delta;149                maxX = x;150                maxY = y;151            }152        }153    }154    // if there are no both darker and brighter pixels among siblings, it's not anti-aliasing155    if (min === 0 || max === 0) return false;156    // if either the darkest or the brightest pixel has 3+ equal siblings in both images157    // (definitely not anti-aliased), this pixel is anti-aliased158    return (hasManySiblings(img, minX, minY, width, height) && hasManySiblings(img2, minX, minY, width, height)) ||159           (hasManySiblings(img, maxX, maxY, width, height) && hasManySiblings(img2, maxX, maxY, width, height));160}161// check if a pixel has 3+ adjacent pixels of the same color.162function hasManySiblings(img, x1, y1, width, height) {163    const x0 = Math.max(x1 - 1, 0);164    const y0 = Math.max(y1 - 1, 0);165    const x2 = Math.min(x1 + 1, width - 1);166    const y2 = Math.min(y1 + 1, height - 1);167    const pos = (y1 * width + x1) * 4;168    let zeroes = x1 === x0 || x1 === x2 || y1 === y0 || y1 === y2 ? 1 : 0;169    // go through 8 adjacent pixels170    for (let x = x0; x <= x2; x++) {171        for (let y = y0; y <= y2; y++) {172            if (x === x1 && y === y1) continue;173            const pos2 = (y * width + x) * 4;174            if (img[pos] === img[pos2] &&175                img[pos + 1] === img[pos2 + 1] &&176                img[pos + 2] === img[pos2 + 2] &&177                img[pos + 3] === img[pos2 + 3]) zeroes++;178            if (zeroes > 2) return true;179        }180    }181    return false;182}183// calculate color difference according to the paper "Measuring perceived color difference184// using YIQ NTSC transmission color space in mobile applications" by Y. Kotsarenko and F. Ramos185function colorDelta(img1, img2, k, m, yOnly) {186    let r1 = img1[k + 0];187    let g1 = img1[k + 1];188    let b1 = img1[k + 2];189    let a1 = img1[k + 3];190    let r2 = img2[m + 0];191    let g2 = img2[m + 1];192    let b2 = img2[m + 2];193    let a2 = img2[m + 3];194    if (a1 === a2 && r1 === r2 && g1 === g2 && b1 === b2) return 0;195    if (a1 < 255) {196        a1 /= 255;197        r1 = blend(r1, a1);198        g1 = blend(g1, a1);199        b1 = blend(b1, a1);200    }201    if (a2 < 255) {202        a2 /= 255;203        r2 = blend(r2, a2);204        g2 = blend(g2, a2);205        b2 = blend(b2, a2);206    }207    const y = rgb2y(r1, g1, b1) - rgb2y(r2, g2, b2);208    if (yOnly) return y; // brightness difference only209    const i = rgb2i(r1, g1, b1) - rgb2i(r2, g2, b2);210    const q = rgb2q(r1, g1, b1) - rgb2q(r2, g2, b2);211    return 0.5053 * y * y + 0.299 * i * i + 0.1957 * q * q;212}213function rgb2y(r, g, b) { return r * 0.29889531 + g * 0.58662247 + b * 0.11448223; }214function rgb2i(r, g, b) { return r * 0.59597799 - g * 0.27417610 - b * 0.32180189; }215function rgb2q(r, g, b) { return r * 0.21147017 - g * 0.52261711 + b * 0.31114694; }216// blend semi-transparent color with white217function blend(c, a) {218    return 255 + (c - 255) * a;219}220function drawPixel(output, pos, r, g, b) {221    output[pos + 0] = r;222    output[pos + 1] = g;223    output[pos + 2] = b;224    output[pos + 3] = 255;225}226function drawGrayPixel(img, pos, alpha, output) {227    const r = img[pos + 0];228    const g = img[pos + 1];229    const b = img[pos + 2];230    const y = rgb2y(r, g, b)231    const val = blend(y, alpha * img[pos + 3] / 255);232    drawPixel(output, pos, val, val, val);233}234// function drawAlphaPixel(output, pos, r, g, b, alpha) {235//     const r = img[pos + 0];236//     const g = img[pos + 1];237//     const b = img[pos + 2];238//     const y = rgb2y(r, g, b)239// }240export default pixelmatch;

pixelmatch.mjs

Source:pixelmatch.mjs

...43        if (a32[i] !== b32[i]) { identical = false; break; }44    }45    if (identical) { // fast path if identical46        if (output && !options.diffMask) {47            for (let i = 0; i < len; i++) drawGrayPixel(img1, 4 * i, options.alpha, output);48        }49        return 0;50    }51    // maximum acceptable square distance between two colors;52    // 35215 is the maximum possible value for the YIQ difference metric53    const maxDelta = 35215 * options.threshold * options.threshold;54    let diff = 0;55    // compare each pixel of one image against the other one56    for (let y = 0; y < height; y++) {57        for (let x = 0; x < width; x++) {58            const pos = (y * width + x) * 4;59            // squared YUV distance between colors at this pixel position, negative if the img2 pixel is darker60            const delta = colorDelta(img1, img2, pos, pos);61            // the color difference is above the threshold62            if (Math.abs(delta) > maxDelta) {63                // check it's a real rendering difference or just anti-aliasing64                if (!options.includeAA && (antialiased(img1, x, y, width, height, img2) ||65                                           antialiased(img2, x, y, width, height, img1))) {66                    // one of the pixels is anti-aliasing; draw as yellow and do not count as difference67                    // note that we do not include such pixels in a mask68                    if (output && !options.diffMask) drawPixel(output, pos, ...options.aaColor);69                } else {70                    // found substantial difference not caused by anti-aliasing; draw it as such71                    if (output) {72                        drawPixel(output, pos, ...(delta < 0 && options.diffColorAlt || options.diffColor));73                    }74                    diff++;75                }76            } else if (output) {77                // pixels are similar; draw background as grayscale image blended with white78                if (!options.diffMask) drawGrayPixel(img1, pos, options.alpha, output);79            }80        }81    }82    // return the number of different pixels83    return diff;84}85function isPixelData(arr) {86    // work around instanceof Uint8Array not working properly in some Jest environments87    return ArrayBuffer.isView(arr) && arr.constructor.BYTES_PER_ELEMENT === 1;88}89// check if a pixel is likely a part of anti-aliasing;90// based on "Anti-aliased Pixel and Intensity Slope Detector" paper by V. Vysniauskas, 200991function antialiased(img, x1, y1, width, height, img2) {92    const x0 = Math.max(x1 - 1, 0);93    const y0 = Math.max(y1 - 1, 0);94    const x2 = Math.min(x1 + 1, width - 1);95    const y2 = Math.min(y1 + 1, height - 1);96    const pos = (y1 * width + x1) * 4;97    let zeroes = x1 === x0 || x1 === x2 || y1 === y0 || y1 === y2 ? 1 : 0;98    let min = 0;99    let max = 0;100    let minX, minY, maxX, maxY;101    // go through 8 adjacent pixels102    for (let x = x0; x <= x2; x++) {103        for (let y = y0; y <= y2; y++) {104            if (x === x1 && y === y1) continue;105            // brightness delta between the center pixel and adjacent one106            const delta = colorDelta(img, img, pos, (y * width + x) * 4, true);107            // count the number of equal, darker and brighter adjacent pixels108            if (delta === 0) {109                zeroes++;110                // if found more than 2 equal siblings, it's definitely not anti-aliasing111                if (zeroes > 2) return false;112            // remember the darkest pixel113            } else if (delta < min) {114                min = delta;115                minX = x;116                minY = y;117            // remember the brightest pixel118            } else if (delta > max) {119                max = delta;120                maxX = x;121                maxY = y;122            }123        }124    }125    // if there are no both darker and brighter pixels among siblings, it's not anti-aliasing126    if (min === 0 || max === 0) return false;127    // if either the darkest or the brightest pixel has 3+ equal siblings in both images128    // (definitely not anti-aliased), this pixel is anti-aliased129    return (hasManySiblings(img, minX, minY, width, height) && hasManySiblings(img2, minX, minY, width, height)) ||130           (hasManySiblings(img, maxX, maxY, width, height) && hasManySiblings(img2, maxX, maxY, width, height));131}132// check if a pixel has 3+ adjacent pixels of the same color.133function hasManySiblings(img, x1, y1, width, height) {134    const x0 = Math.max(x1 - 1, 0);135    const y0 = Math.max(y1 - 1, 0);136    const x2 = Math.min(x1 + 1, width - 1);137    const y2 = Math.min(y1 + 1, height - 1);138    const pos = (y1 * width + x1) * 4;139    let zeroes = x1 === x0 || x1 === x2 || y1 === y0 || y1 === y2 ? 1 : 0;140    // go through 8 adjacent pixels141    for (let x = x0; x <= x2; x++) {142        for (let y = y0; y <= y2; y++) {143            if (x === x1 && y === y1) continue;144            const pos2 = (y * width + x) * 4;145            if (img[pos] === img[pos2] &&146                img[pos + 1] === img[pos2 + 1] &&147                img[pos + 2] === img[pos2 + 2] &&148                img[pos + 3] === img[pos2 + 3]) zeroes++;149            if (zeroes > 2) return true;150        }151    }152    return false;153}154// calculate color difference according to the paper "Measuring perceived color difference155// using YIQ NTSC transmission color space in mobile applications" by Y. Kotsarenko and F. Ramos156function colorDelta(img1, img2, k, m, yOnly) {157    let r1 = img1[k + 0];158    let g1 = img1[k + 1];159    let b1 = img1[k + 2];160    let a1 = img1[k + 3];161    let r2 = img2[m + 0];162    let g2 = img2[m + 1];163    let b2 = img2[m + 2];164    let a2 = img2[m + 3];165    if (a1 === a2 && r1 === r2 && g1 === g2 && b1 === b2) return 0;166    if (a1 < 255) {167        a1 /= 255;168        r1 = blend(r1, a1);169        g1 = blend(g1, a1);170        b1 = blend(b1, a1);171    }172    if (a2 < 255) {173        a2 /= 255;174        r2 = blend(r2, a2);175        g2 = blend(g2, a2);176        b2 = blend(b2, a2);177    }178    const y1 = rgb2y(r1, g1, b1);179    const y2 = rgb2y(r2, g2, b2);180    const y = y1 - y2;181    if (yOnly) return y; // brightness difference only182    const i = rgb2i(r1, g1, b1) - rgb2i(r2, g2, b2);183    const q = rgb2q(r1, g1, b1) - rgb2q(r2, g2, b2);184    const delta = 0.5053 * y * y + 0.299 * i * i + 0.1957 * q * q;185    // encode whether the pixel lightens or darkens in the sign186    return y1 > y2 ? -delta : delta;187}188function rgb2y(r, g, b) { return r * 0.29889531 + g * 0.58662247 + b * 0.11448223; }189function rgb2i(r, g, b) { return r * 0.59597799 - g * 0.27417610 - b * 0.32180189; }190function rgb2q(r, g, b) { return r * 0.21147017 - g * 0.52261711 + b * 0.31114694; }191// blend semi-transparent color with white192function blend(c, a) {193    return 255 + (c - 255) * a;194}195function drawPixel(output, pos, r, g, b) {196    output[pos + 0] = r;197    output[pos + 1] = g;198    output[pos + 2] = b;199    output[pos + 3] = 255;200}201function drawGrayPixel(img, i, alpha, output) {202    const r = img[i + 0];203    const g = img[i + 1];204    const b = img[i + 2];205    const val = blend(rgb2y(r, g, b), alpha * img[i + 3] / 255);206    drawPixel(output, i, val, val, val);...

ImgDiffUtil.js

Source:ImgDiffUtil.js

...25      if (a32[i] !== b32[i]) { identical = false; break; }26    }27    if (identical) { // fast path if identical28      if (output && !options.diffMask) {29        for (let i = 0; i < len; i++) ImgDiffUtil.drawGrayPixel(img1, 4 * i, options.alpha, output);30      }31      return 0;32    }33    // maximum acceptable square distance between two colors;34    // 35215 is the maximum possible value for the YIQ difference metric35    const maxDelta = 35215 * options.threshold * options.threshold;36    let diff = 0;37    // compare each pixel of one image against the other one38    for (let y = 0; y < height; y++) {39      for (let x = 0; x < width; x++) {40        const pos = (y * width + x) * 4;41        // squared YUV distance between colors at this pixel position, negative if the img2 pixel is darker42        const delta = ImgDiffUtil.colorDelta(img1, img2, pos, pos);43        // the color difference is above the threshold44        if (Math.abs(delta) > maxDelta) {45          // check it's a real rendering difference or just anti-aliasing46          if (!options.includeAA && (ImgDiffUtil.antialiased(img1, x, y, width, height, img2) ||47            ImgDiffUtil.antialiased(img2, x, y, width, height, img1))) {48            // one of the pixels is anti-aliasing; draw as yellow and do not count as difference49            // note that we do not include such pixels in a mask50            if (output && !options.diffMask) ImgDiffUtil.drawPixel(output, pos, ...options.aaColor);51          } else {52            // found substantial difference not caused by anti-aliasing; draw it as such53            if (output) {54              ImgDiffUtil.drawPixel(output, pos, ...(delta < 0 && options.diffColorAlt || options.diffColor));55            }56            diff++;57          }58        } else if (output) {59          // pixels are similar; draw background as grayscale image blended with white60          if (!options.diffMask) ImgDiffUtil.drawGrayPixel(img1, pos, options.alpha, output);61        }62      }63    }64    // return the number of different pixels65    return diff;66  },67  isPixelData: function (arr) {68    // work around instanceof Uint8Array not working properly in some Jest environments69    return ArrayBuffer.isView(arr) && arr.constructor.BYTES_PER_ELEMENT === 1;70  },71// check if a pixel is likely a part of anti-aliasing;72// based on "Anti-aliased Pixel and Intensity Slope Detector" paper by V. Vysniauskas, 200973  antialiased: function (img, x1, y1, width, height, img2) {74    const x0 = Math.max(x1 - 1, 0);...

index.js

Source:index.js

...25        if (a32[i] !== b32[i]) { identical = false; break; }26    }27    if (identical) { // fast path if identical28        if (output && !options.diffMask) {29            for (let i = 0; i < len; i++) drawGrayPixel(img1, 4 * i, options.alpha, output);30        }31        return 0;32    }33    // maximum acceptable square distance between two colors;34    // 35215 is the maximum possible value for the YIQ difference metric35    const maxDelta = 35215 * options.threshold * options.threshold;36    let diff = 0;37    // compare each pixel of one image against the other one38    for (let y = 0; y < height; y++) {39        for (let x = 0; x < width; x++) {40            const pos = (y * width + x) * 4;41            // squared YUV distance between colors at this pixel position, negative if the img2 pixel is darker42            const delta = colorDelta(img1, img2, pos, pos);43            // the color difference is above the threshold44            if (Math.abs(delta) > maxDelta) {45                // check it's a real rendering difference or just anti-aliasing46                if (!options.includeAA && (antialiased(img1, x, y, width, height, img2) ||47                                           antialiased(img2, x, y, width, height, img1))) {48                    // one of the pixels is anti-aliasing; draw as yellow and do not count as difference49                    // note that we do not include such pixels in a mask50                    if (output && !options.diffMask) drawPixel(output, pos, ...options.aaColor);51                } else {52                    // found substantial difference not caused by anti-aliasing; draw it as such53                    if (output) {54                        drawPixel(output, pos, ...(delta < 0 && options.diffColorAlt || options.diffColor));55                    }56                    diff++;57                }58            } else if (output) {59                // pixels are similar; draw background as grayscale image blended with white60                if (!options.diffMask) drawGrayPixel(img1, pos, options.alpha, output);61            }62        }63    }64    // return the number of different pixels65    return diff;66}67function isPixelData(arr) {68    // work around instanceof Uint8Array not working properly in some Jest environments69    return ArrayBuffer.isView(arr) && arr.constructor.BYTES_PER_ELEMENT === 1;70}71// check if a pixel is likely a part of anti-aliasing;72// based on "Anti-aliased Pixel and Intensity Slope Detector" paper by V. Vysniauskas, 200973function antialiased(img, x1, y1, width, height, img2) {74    const x0 = Math.max(x1 - 1, 0);75    const y0 = Math.max(y1 - 1, 0);76    const x2 = Math.min(x1 + 1, width - 1);77    const y2 = Math.min(y1 + 1, height - 1);78    const pos = (y1 * width + x1) * 4;79    let zeroes = x1 === x0 || x1 === x2 || y1 === y0 || y1 === y2 ? 1 : 0;80    let min = 0;81    let max = 0;82    let minX, minY, maxX, maxY;83    // go through 8 adjacent pixels84    for (let x = x0; x <= x2; x++) {85        for (let y = y0; y <= y2; y++) {86            if (x === x1 && y === y1) continue;87            // brightness delta between the center pixel and adjacent one88            const delta = colorDelta(img, img, pos, (y * width + x) * 4, true);89            // count the number of equal, darker and brighter adjacent pixels90            if (delta === 0) {91                zeroes++;92                // if found more than 2 equal siblings, it's definitely not anti-aliasing93                if (zeroes > 2) return false;94            // remember the darkest pixel95            } else if (delta < min) {96                min = delta;97                minX = x;98                minY = y;99            // remember the brightest pixel100            } else if (delta > max) {101                max = delta;102                maxX = x;103                maxY = y;104            }105        }106    }107    // if there are no both darker and brighter pixels among siblings, it's not anti-aliasing108    if (min === 0 || max === 0) return false;109    // if either the darkest or the brightest pixel has 3+ equal siblings in both images110    // (definitely not anti-aliased), this pixel is anti-aliased111    return (hasManySiblings(img, minX, minY, width, height) && hasManySiblings(img2, minX, minY, width, height)) ||112           (hasManySiblings(img, maxX, maxY, width, height) && hasManySiblings(img2, maxX, maxY, width, height));113}114// check if a pixel has 3+ adjacent pixels of the same color.115function hasManySiblings(img, x1, y1, width, height) {116    const x0 = Math.max(x1 - 1, 0);117    const y0 = Math.max(y1 - 1, 0);118    const x2 = Math.min(x1 + 1, width - 1);119    const y2 = Math.min(y1 + 1, height - 1);120    const pos = (y1 * width + x1) * 4;121    let zeroes = x1 === x0 || x1 === x2 || y1 === y0 || y1 === y2 ? 1 : 0;122    // go through 8 adjacent pixels123    for (let x = x0; x <= x2; x++) {124        for (let y = y0; y <= y2; y++) {125            if (x === x1 && y === y1) continue;126            const pos2 = (y * width + x) * 4;127            if (img[pos] === img[pos2] &&128                img[pos + 1] === img[pos2 + 1] &&129                img[pos + 2] === img[pos2 + 2] &&130                img[pos + 3] === img[pos2 + 3]) zeroes++;131            if (zeroes > 2) return true;132        }133    }134    return false;135}136// calculate color difference according to the paper "Measuring perceived color difference137// using YIQ NTSC transmission color space in mobile applications" by Y. Kotsarenko and F. Ramos138function colorDelta(img1, img2, k, m, yOnly) {139    let r1 = img1[k + 0];140    let g1 = img1[k + 1];141    let b1 = img1[k + 2];142    let a1 = img1[k + 3];143    let r2 = img2[m + 0];144    let g2 = img2[m + 1];145    let b2 = img2[m + 2];146    let a2 = img2[m + 3];147    if (a1 === a2 && r1 === r2 && g1 === g2 && b1 === b2) return 0;148    if (a1 < 255) {149        a1 /= 255;150        r1 = blend(r1, a1);151        g1 = blend(g1, a1);152        b1 = blend(b1, a1);153    }154    if (a2 < 255) {155        a2 /= 255;156        r2 = blend(r2, a2);157        g2 = blend(g2, a2);158        b2 = blend(b2, a2);159    }160    const y1 = rgb2y(r1, g1, b1);161    const y2 = rgb2y(r2, g2, b2);162    const y = y1 - y2;163    if (yOnly) return y; // brightness difference only164    const i = rgb2i(r1, g1, b1) - rgb2i(r2, g2, b2);165    const q = rgb2q(r1, g1, b1) - rgb2q(r2, g2, b2);166    const delta = 0.5053 * y * y + 0.299 * i * i + 0.1957 * q * q;167    // encode whether the pixel lightens or darkens in the sign168    return y1 > y2 ? -delta : delta;169}170function rgb2y(r, g, b) { return r * 0.29889531 + g * 0.58662247 + b * 0.11448223; }171function rgb2i(r, g, b) { return r * 0.59597799 - g * 0.27417610 - b * 0.32180189; }172function rgb2q(r, g, b) { return r * 0.21147017 - g * 0.52261711 + b * 0.31114694; }173// blend semi-transparent color with white174function blend(c, a) {175    return 255 + (c - 255) * a;176}177function drawPixel(output, pos, r, g, b) {178    output[pos + 0] = r;179    output[pos + 1] = g;180    output[pos + 2] = b;181    output[pos + 3] = 255;182}183function drawGrayPixel(img, i, alpha, output) {184    const r = img[i + 0];185    const g = img[i + 1];186    const b = img[i + 2];187    const val = blend(rgb2y(r, g, b), alpha * img[i + 3] / 255);188    drawPixel(output, i, val, val, val);...

pixelmatch-5.2.0.js

Source:pixelmatch-5.2.0.js

...25        if (a32[i] !== b32[i]) { identical = false; break; }26    }27    if (identical) { // fast path if identical28        if (output && !options.diffMask) {29            for (let i = 0; i < len; i++) drawGrayPixel(img1, 4 * i, options.alpha, output);30        }31        return 0;32    }33    // maximum acceptable square distance between two colors;34    // 35215 is the maximum possible value for the YIQ difference metric35    const maxDelta = 35215 * options.threshold * options.threshold;36    let diff = 0;37    // compare each pixel of one image against the other one38    for (let y = 0; y < height; y++) {39        for (let x = 0; x < width; x++) {40            const pos = (y * width + x) * 4;41            // squared YUV distance between colors at this pixel position, negative if the img2 pixel is darker42            const delta = colorDelta(img1, img2, pos, pos);43            // the color difference is above the threshold44            if (Math.abs(delta) > maxDelta) {45                // check it's a real rendering difference or just anti-aliasing46                if (!options.includeAA && (antialiased(img1, x, y, width, height, img2) ||47                                           antialiased(img2, x, y, width, height, img1))) {48                    // one of the pixels is anti-aliasing; draw as yellow and do not count as difference49                    // note that we do not include such pixels in a mask50                    if (output && !options.diffMask) drawPixel(output, pos, ...options.aaColor);51                } else {52                    // found substantial difference not caused by anti-aliasing; draw it as such53                    if (output) {54                        drawPixel(output, pos, ...(delta < 0 && options.diffColorAlt || options.diffColor));55                    }56                    diff++;57                }58            } else if (output) {59                // pixels are similar; draw background as grayscale image blended with white60                if (!options.diffMask) drawGrayPixel(img1, pos, options.alpha, output);61            }62        }63    }64    // return the number of different pixels65    return diff;66}67function isPixelData(arr) {68    // work around instanceof Uint8Array not working properly in some Jest environments69    return ArrayBuffer.isView(arr) && arr.constructor.BYTES_PER_ELEMENT === 1;70}71// check if a pixel is likely a part of anti-aliasing;72// based on "Anti-aliased Pixel and Intensity Slope Detector" paper by V. Vysniauskas, 200973function antialiased(img, x1, y1, width, height, img2) {74    const x0 = Math.max(x1 - 1, 0);75    const y0 = Math.max(y1 - 1, 0);76    const x2 = Math.min(x1 + 1, width - 1);77    const y2 = Math.min(y1 + 1, height - 1);78    const pos = (y1 * width + x1) * 4;79    let zeroes = x1 === x0 || x1 === x2 || y1 === y0 || y1 === y2 ? 1 : 0;80    let min = 0;81    let max = 0;82    let minX, minY, maxX, maxY;83    // go through 8 adjacent pixels84    for (let x = x0; x <= x2; x++) {85        for (let y = y0; y <= y2; y++) {86            if (x === x1 && y === y1) continue;87            // brightness delta between the center pixel and adjacent one88            const delta = colorDelta(img, img, pos, (y * width + x) * 4, true);89            // count the number of equal, darker and brighter adjacent pixels90            if (delta === 0) {91                zeroes++;92                // if found more than 2 equal siblings, it's definitely not anti-aliasing93                if (zeroes > 2) return false;94            // remember the darkest pixel95            } else if (delta < min) {96                min = delta;97                minX = x;98                minY = y;99            // remember the brightest pixel100            } else if (delta > max) {101                max = delta;102                maxX = x;103                maxY = y;104            }105        }106    }107    // if there are no both darker and brighter pixels among siblings, it's not anti-aliasing108    if (min === 0 || max === 0) return false;109    // if either the darkest or the brightest pixel has 3+ equal siblings in both images110    // (definitely not anti-aliased), this pixel is anti-aliased111    return (hasManySiblings(img, minX, minY, width, height) && hasManySiblings(img2, minX, minY, width, height)) ||112           (hasManySiblings(img, maxX, maxY, width, height) && hasManySiblings(img2, maxX, maxY, width, height));113}114// check if a pixel has 3+ adjacent pixels of the same color.115function hasManySiblings(img, x1, y1, width, height) {116    const x0 = Math.max(x1 - 1, 0);117    const y0 = Math.max(y1 - 1, 0);118    const x2 = Math.min(x1 + 1, width - 1);119    const y2 = Math.min(y1 + 1, height - 1);120    const pos = (y1 * width + x1) * 4;121    let zeroes = x1 === x0 || x1 === x2 || y1 === y0 || y1 === y2 ? 1 : 0;122    // go through 8 adjacent pixels123    for (let x = x0; x <= x2; x++) {124        for (let y = y0; y <= y2; y++) {125            if (x === x1 && y === y1) continue;126            const pos2 = (y * width + x) * 4;127            if (img[pos] === img[pos2] &&128                img[pos + 1] === img[pos2 + 1] &&129                img[pos + 2] === img[pos2 + 2] &&130                img[pos + 3] === img[pos2 + 3]) zeroes++;131            if (zeroes > 2) return true;132        }133    }134    return false;135}136// calculate color difference according to the paper "Measuring perceived color difference137// using YIQ NTSC transmission color space in mobile applications" by Y. Kotsarenko and F. Ramos138function colorDelta(img1, img2, k, m, yOnly) {139    let r1 = img1[k + 0];140    let g1 = img1[k + 1];141    let b1 = img1[k + 2];142    let a1 = img1[k + 3];143    let r2 = img2[m + 0];144    let g2 = img2[m + 1];145    let b2 = img2[m + 2];146    let a2 = img2[m + 3];147    if (a1 === a2 && r1 === r2 && g1 === g2 && b1 === b2) return 0;148    if (a1 < 255) {149        a1 /= 255;150        r1 = blend(r1, a1);151        g1 = blend(g1, a1);152        b1 = blend(b1, a1);153    }154    if (a2 < 255) {155        a2 /= 255;156        r2 = blend(r2, a2);157        g2 = blend(g2, a2);158        b2 = blend(b2, a2);159    }160    const y1 = rgb2y(r1, g1, b1);161    const y2 = rgb2y(r2, g2, b2);162    const y = y1 - y2;163    if (yOnly) return y; // brightness difference only164    const i = rgb2i(r1, g1, b1) - rgb2i(r2, g2, b2);165    const q = rgb2q(r1, g1, b1) - rgb2q(r2, g2, b2);166    const delta = 0.5053 * y * y + 0.299 * i * i + 0.1957 * q * q;167    // encode whether the pixel lightens or darkens in the sign168    return y1 > y2 ? -delta : delta;169}170function rgb2y(r, g, b) { return r * 0.29889531 + g * 0.58662247 + b * 0.11448223; }171function rgb2i(r, g, b) { return r * 0.59597799 - g * 0.27417610 - b * 0.32180189; }172function rgb2q(r, g, b) { return r * 0.21147017 - g * 0.52261711 + b * 0.31114694; }173// blend semi-transparent color with white174function blend(c, a) {175    return 255 + (c - 255) * a;176}177function drawPixel(output, pos, r, g, b) {178    output[pos + 0] = r;179    output[pos + 1] = g;180    output[pos + 2] = b;181    output[pos + 3] = 255;182}183function drawGrayPixel(img, i, alpha, output) {184    const r = img[i + 0];185    const g = img[i + 1];186    const b = img[i + 2];187    const val = blend(rgb2y(r, g, b), alpha * img[i + 3] / 255);188    drawPixel(output, i, val, val, val);...

Using AI Code Generation

1const { drawGrayPixel } = require('playwright/lib/server/chromium/crPage');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  const rect = await page.evaluate(() => {7    const rect = document.querySelector('#js-link-box-en').getBoundingClientRect();8    return {9    };10  });11  await drawGrayPixel(page, rect.x, rect.y);12  await page.screenshot({ path: 'wikipedia.png' });13  await browser.close();14})();15const { drawGrayPixel } = require('playwright/lib/server/chromium/crPage');16(async () => {17  const browser = await chromium.launch();18  const context = await browser.newContext();19  const page = await context.newPage();20  const rect = await page.evaluate(() => {21    const rect = document.querySelector('#js-link-box-en').getBoundingClientRect();22    return {23    };24  });25  await drawGrayPixel(page, rect.x, rect.y);26  await page.screenshot({ path: 'wikipedia.png' });27  await browser.close();28})();29const { drawGrayPixel } = require('playwright/lib/server/chromium/crPage');30(async () => {31  const browser = await chromium.launch();32  const context = await browser.newContext();33  const page = await context.newPage();34  const rect = await page.evaluate(() => {35    const rect = document.querySelector('#js-link-box-en').getBoundingClientRect();36    return {37    };38  });39  await drawGrayPixel(page, rect.x, rect.y);40  await page.screenshot({ path: 'w

Using AI Code Generation

1const {chromium} = require('playwright');2const {drawGrayPixel} = require('playwright/lib/server/screencast/screencast');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.screenshot({ path: 'example.png' });8  await browser.close();9})();10const { drawGrayPixel } = require('./drawGrayPixel');11class Screencast {12  constructor(page, context, options) {13    this._page = page;14    this._context = context;15    this._options = options;16    this._video = new VideoWriter(options);17    this._pageProxy = page._delegate;18    this._pageProxy.on(PageProxyEvents.ScreencastFrame, this._onScreencastFrame.bind(this));19    this._pageProxy.on(PageProxyEvents.ScreencastVisibilityChanged, this._onScreencastVisibilityChanged.bind(this));20    this._pageProxy.on(PageProxyEvents.Close, () => this.stop());21    this._page.on(Page.Events.Close, () => this.stop());22    this._page.on(Page.Events.Popup, popup => this._onPopup(popup));23    this._page.on(Page.Events.Video, video => this._onVideo(video));24    this._page.on(Page.Events.Console, message => this._onConsoleMessage(message));25    this._page.on(Page.Events.Download, download => this._onDownload(download));26    this._page.on(Page.Events.Request, request => this._onRequest(request));27    this._page.on(Page.Events.Response, response => this._onResponse(response));28    this._page.on(Page.Events.RequestFailed, request => this._onRequestFailed(request));29    this._page.on(Page.Events.RequestFinished, request => this._onRequestFinished(request));30    this._page.on(Page.Events.DOMContentLoaded, () => this._onDOMContentLoaded());31    this._page.on(Page.Events.Load, () => this._onLoad());32    this._page.on(Page.Events.FrameAttached, frame => this._onFrameAttached(frame));33    this._page.on(Page.Events.FrameNavigated, frame => this._onFrameNavigated(frame));34    this._page.on(Page.Events

Using AI Code Generation

1const { drawGrayPixel } = require('playwright-core/lib/server/chromium/crPage');2const { chromium } = require('playwright-core');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.evaluate(() => {8    drawGrayPixel(10, 10, 1, 1, 0.5);9  });10  await page.screenshot({ path: 'example.png' });11  await browser.close();12})();13const { drawGrayPixel } = require('playwright-core/lib/server/chromium/crPage');14const { chromium } = require('playwright-core');15(async () => {16  const browser = await chromium.launch();17  const context = await browser.newContext();18  const page = await context.newPage();19  await page.evaluate(() => {20    drawGrayPixel(10, 10, 1, 1, 0.5);21  });22  await page.screenshot({ path: 'example.png' });23  await browser.close();24})();25const { drawGrayPixel } = require('playwright-core/lib/server/chromium/crPage');26const { chromium } = require('playwright-core');27(async () => {28  const browser = await chromium.launch();29  const context = await browser.newContext();30  const page = await context.newPage();31  await page.evaluate(() => {32    drawGrayPixel(10, 10, 1, 1, 0.5);33  });34  await page.screenshot({ path: 'example.png' });35  await browser.close();36})();

Using AI Code Generation

1const { drawGrayPixel } = require('playwright-core/lib/server/chromium/crBrowser');2const { chromium } = require('playwright-core');3(async () => {4  const browser = await chromium.launch({ headless: false });5  const page = await browser.newPage();6  const context = await page.context();7  const frame = page.mainFrame();8  await drawGrayPixel(context, frame, 10, 10);9  await page.screenshot({ path: 'google.png' });10  await browser.close();11})();

Using AI Code Generation

1const { devices } = require('@playwright/test');2const iPhone = devices['iPhone 11 Pro'];3const drawGrayPixel = async (page, x, y) => {4  await page.evaluate(async (x, y) => {5    const context = window._playwrightInternal.context;6    const canvas = context.canvas;7    const context2d = canvas.getContext('2d');8    context2d.fillStyle = 'gray';9    context2d.fillRect(x, y, 1, 1);10  }, x, y);11};12(async () => {13  const browser = await chromium.launch();14  const context = await browser.newContext({15    viewport: { width: 400, height: 400 },16  });17  const page = await context.newPage();18  await drawGrayPixel(page, 10, 10);19  await page.screenshot({ path: 'example.png' });20  await browser.close();21})();22test.describe('Test', () => {23  test.beforeEach(async ({ page }) => {24  });25  test('should work', async ({ page }) => {26    await drawGrayPixel(page, 10, 10);27    await page.screenshot({ path: 'example.png' });28  });29});

Using AI Code Generation

1const { drawGrayPixel } = require('playwright/lib/server/screencast/screencast');2drawGrayPixel(0, 0, 0, 0, 0);3const { drawGrayPixel } = require('playwright/lib/server/screencast/screencast');4drawGrayPixel(0, 0, 0, 0, 0);5const { drawGrayPixel } = require('playwright/lib/server/screencast/screencast');6drawGrayPixel(0, 0, 0, 0, 0);7const { drawGrayPixel } = require('playwright/lib/server/screencast/screencast');8drawGrayPixel(0, 0, 0, 0, 0);9const { drawGrayPixel } = require('playwright/lib/server/screencast/screencast');10drawGrayPixel(0, 0, 0, 0, 0);11const { drawGrayPixel } = require('playwright/lib/server/screencast/screencast');12drawGrayPixel(0, 0, 0, 0, 0);13const { drawGrayPixel } = require('playwright/lib/server/screencast/screencast');14drawGrayPixel(0, 0, 0, 0, 0);15const { drawGrayPixel } = require('playwright/lib/server/screencast/screencast');16drawGrayPixel(0, 0, 0, 0, 0);17const { drawGrayPixel } = require('playwright/lib/server/screencast/screencast');18drawGrayPixel(0, 0, 0, 0, 0);19const { drawGrayPixel } = require('playwright

Using AI Code Generation

1const { drawGrayPixel } = require('@playwright/test/lib/server/trace/recorder/recorderApp');2drawGrayPixel({ x: 100, y: 100 });3const { test } = require('@playwright/test');4test('draw gray pixel', async ({ page }) => {5  await page.evaluate(() => {6    const { drawGrayPixel } = require('@playwright/test/lib/server/trace/recorder/recorderApp');7    drawGrayPixel({ x: 100, y: 100 });8  });9});

Using AI Code Generation

1await page.evaluate(async (x, y, color) => {2    await window.__playwright__internal__object(drawGrayPixel)(x, y, color);3  }, x, y, color);4await page.evaluate(async (x, y, color) => {5    await window.__playwright__internal__object(drawGreenPixel)(x, y, color);6  }, x, y, color);7await page.evaluate(async (x, y, color) => {8    await window.__playwright__internal__object(drawRedPixel)(x, y, color);9  }, x, y, color);10await page.evaluate(async (x, y, color) => {11    await window.__playwright__internal__object(drawBluePixel)(x, y, color);12  }, x, y, color);13await page.evaluate(async (x, y, color) => {14    await window.__playwright__internal__object(drawYellowPixel)(x, y, color);15  }, x, y, color);16await page.evaluate(async (x, y, color) => {17    await window.__playwright__internal__object(drawWhitePixel)(x, y, color);18  }, x, y, color);19await page.evaluate(async (x, y, color) => {20    await window.__playwright__internal__object(drawBlackPixel)(x, y, color);21  }, x, y, color);22await page.evaluate(async (x, y, color) => {23    await window.__playwright__internal__object(drawCyanPixel)(x, y, color);24  }, x, y, color);25await page.evaluate(async (x, y, color) => {26    await window.__playwright__internal__object(drawMagentaPixel)(x, y, color);27  }, x, y, color);

Using AI Code Generation

1const { drawGrayPixel } = require('playwright/lib/server/chromium/crPixel');2const browser = await chromium.launch();3const context = await browser.newContext();4const page = await context.newPage();5await page.setViewportSize({ width: 100, height: 100 });6await page.evaluate((width, height, drawGrayPixel) => {7  const canvas = document.createElement('canvas');8  canvas.width = width;9  canvas.height = height;10  document.body.appendChild(canvas);11  const ctx = canvas.getContext('2d');12  const imageData = ctx.createImageData(width, height);13  drawGrayPixel(imageData, 0, 0, 0, 0.5);14  ctx.putImageData(imageData, 0, 0);15}, 100, 100, drawGrayPixel);16await page.screenshot({ path: 'screenshot.png' });17await browser.close();18{19  "dependencies": {20  }21}

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.