@cocalc/cdn/dist/pdfjs-dist/lib/display/canvas.js

Files that CoCalc uses that would be natural in various contexts to get from a CDN

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2022 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @licend The above is the entire license notice for the
 * Javascript code in this page
 */
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.CanvasGraphics = void 0;

var _util = require("../shared/util.js");

var _pattern_helper = require("./pattern_helper.js");

var _display_utils = require("./display_utils.js");

const MIN_FONT_SIZE = 16;
const MAX_FONT_SIZE = 100;
const MAX_GROUP_SIZE = 4096;
const EXECUTION_TIME = 15;
const EXECUTION_STEPS = 10;
const COMPILE_TYPE3_GLYPHS = true;
const MAX_SIZE_TO_COMPILE = 1000;
const FULL_CHUNK_HEIGHT = 16;
const LINEWIDTH_SCALE_FACTOR = 1.000001;

function mirrorContextOperations(ctx, destCtx) {
  if (ctx._removeMirroring) {
    throw new Error("Context is already forwarding operations.");
  }

  ctx.__originalSave = ctx.save;
  ctx.__originalRestore = ctx.restore;
  ctx.__originalRotate = ctx.rotate;
  ctx.__originalScale = ctx.scale;
  ctx.__originalTranslate = ctx.translate;
  ctx.__originalTransform = ctx.transform;
  ctx.__originalSetTransform = ctx.setTransform;
  ctx.__originalResetTransform = ctx.resetTransform;
  ctx.__originalClip = ctx.clip;
  ctx.__originalMoveTo = ctx.moveTo;
  ctx.__originalLineTo = ctx.lineTo;
  ctx.__originalBezierCurveTo = ctx.bezierCurveTo;
  ctx.__originalRect = ctx.rect;
  ctx.__originalClosePath = ctx.closePath;
  ctx.__originalBeginPath = ctx.beginPath;

  ctx._removeMirroring = () => {
    ctx.save = ctx.__originalSave;
    ctx.restore = ctx.__originalRestore;
    ctx.rotate = ctx.__originalRotate;
    ctx.scale = ctx.__originalScale;
    ctx.translate = ctx.__originalTranslate;
    ctx.transform = ctx.__originalTransform;
    ctx.setTransform = ctx.__originalSetTransform;
    ctx.resetTransform = ctx.__originalResetTransform;
    ctx.clip = ctx.__originalClip;
    ctx.moveTo = ctx.__originalMoveTo;
    ctx.lineTo = ctx.__originalLineTo;
    ctx.bezierCurveTo = ctx.__originalBezierCurveTo;
    ctx.rect = ctx.__originalRect;
    ctx.closePath = ctx.__originalClosePath;
    ctx.beginPath = ctx.__originalBeginPath;
    delete ctx._removeMirroring;
  };

  ctx.save = function ctxSave() {
    destCtx.save();

    this.__originalSave();
  };

  ctx.restore = function ctxRestore() {
    destCtx.restore();

    this.__originalRestore();
  };

  ctx.translate = function ctxTranslate(x, y) {
    destCtx.translate(x, y);

    this.__originalTranslate(x, y);
  };

  ctx.scale = function ctxScale(x, y) {
    destCtx.scale(x, y);

    this.__originalScale(x, y);
  };

  ctx.transform = function ctxTransform(a, b, c, d, e, f) {
    destCtx.transform(a, b, c, d, e, f);

    this.__originalTransform(a, b, c, d, e, f);
  };

  ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) {
    destCtx.setTransform(a, b, c, d, e, f);

    this.__originalSetTransform(a, b, c, d, e, f);
  };

  ctx.resetTransform = function ctxResetTransform() {
    destCtx.resetTransform();

    this.__originalResetTransform();
  };

  ctx.rotate = function ctxRotate(angle) {
    destCtx.rotate(angle);

    this.__originalRotate(angle);
  };

  ctx.clip = function ctxRotate(rule) {
    destCtx.clip(rule);

    this.__originalClip(rule);
  };

  ctx.moveTo = function (x, y) {
    destCtx.moveTo(x, y);

    this.__originalMoveTo(x, y);
  };

  ctx.lineTo = function (x, y) {
    destCtx.lineTo(x, y);

    this.__originalLineTo(x, y);
  };

  ctx.bezierCurveTo = function (cp1x, cp1y, cp2x, cp2y, x, y) {
    destCtx.bezierCurveTo(cp1x, cp1y, cp2x, cp2y, x, y);

    this.__originalBezierCurveTo(cp1x, cp1y, cp2x, cp2y, x, y);
  };

  ctx.rect = function (x, y, width, height) {
    destCtx.rect(x, y, width, height);

    this.__originalRect(x, y, width, height);
  };

  ctx.closePath = function () {
    destCtx.closePath();

    this.__originalClosePath();
  };

  ctx.beginPath = function () {
    destCtx.beginPath();

    this.__originalBeginPath();
  };
}

function addContextCurrentTransform(ctx) {
  if (ctx._transformStack) {
    ctx._transformStack = [];
  }

  if (ctx.mozCurrentTransform) {
    return;
  }

  ctx._originalSave = ctx.save;
  ctx._originalRestore = ctx.restore;
  ctx._originalRotate = ctx.rotate;
  ctx._originalScale = ctx.scale;
  ctx._originalTranslate = ctx.translate;
  ctx._originalTransform = ctx.transform;
  ctx._originalSetTransform = ctx.setTransform;
  ctx._originalResetTransform = ctx.resetTransform;
  ctx._transformMatrix = ctx._transformMatrix || [1, 0, 0, 1, 0, 0];
  ctx._transformStack = [];

  try {
    const desc = Object.getOwnPropertyDescriptor(Object.getPrototypeOf(ctx), "lineWidth");
    ctx._setLineWidth = desc.set;
    ctx._getLineWidth = desc.get;
    Object.defineProperty(ctx, "lineWidth", {
      set: function setLineWidth(width) {
        this._setLineWidth(width * LINEWIDTH_SCALE_FACTOR);
      },
      get: function getLineWidth() {
        return this._getLineWidth();
      }
    });
  } catch (_) {}

  Object.defineProperty(ctx, "mozCurrentTransform", {
    get: function getCurrentTransform() {
      return this._transformMatrix;
    }
  });
  Object.defineProperty(ctx, "mozCurrentTransformInverse", {
    get: function getCurrentTransformInverse() {
      const [a, b, c, d, e, f] = this._transformMatrix;
      const ad_bc = a * d - b * c;
      const bc_ad = b * c - a * d;
      return [d / ad_bc, b / bc_ad, c / bc_ad, a / ad_bc, (d * e - c * f) / bc_ad, (b * e - a * f) / ad_bc];
    }
  });

  ctx.save = function ctxSave() {
    const old = this._transformMatrix;

    this._transformStack.push(old);

    this._transformMatrix = old.slice(0, 6);

    this._originalSave();
  };

  ctx.restore = function ctxRestore() {
    if (this._transformStack.length === 0) {
      (0, _util.warn)("Tried to restore a ctx when the stack was already empty.");
    }

    const prev = this._transformStack.pop();

    if (prev) {
      this._transformMatrix = prev;

      this._originalRestore();
    }
  };

  ctx.translate = function ctxTranslate(x, y) {
    const m = this._transformMatrix;
    m[4] = m[0] * x + m[2] * y + m[4];
    m[5] = m[1] * x + m[3] * y + m[5];

    this._originalTranslate(x, y);
  };

  ctx.scale = function ctxScale(x, y) {
    const m = this._transformMatrix;
    m[0] *= x;
    m[1] *= x;
    m[2] *= y;
    m[3] *= y;

    this._originalScale(x, y);
  };

  ctx.transform = function ctxTransform(a, b, c, d, e, f) {
    const m = this._transformMatrix;
    this._transformMatrix = [m[0] * a + m[2] * b, m[1] * a + m[3] * b, m[0] * c + m[2] * d, m[1] * c + m[3] * d, m[0] * e + m[2] * f + m[4], m[1] * e + m[3] * f + m[5]];

    ctx._originalTransform(a, b, c, d, e, f);
  };

  ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) {
    this._transformMatrix = [a, b, c, d, e, f];

    ctx._originalSetTransform(a, b, c, d, e, f);
  };

  ctx.resetTransform = function ctxResetTransform() {
    this._transformMatrix = [1, 0, 0, 1, 0, 0];

    ctx._originalResetTransform();
  };

  ctx.rotate = function ctxRotate(angle) {
    const cosValue = Math.cos(angle);
    const sinValue = Math.sin(angle);
    const m = this._transformMatrix;
    this._transformMatrix = [m[0] * cosValue + m[2] * sinValue, m[1] * cosValue + m[3] * sinValue, m[0] * -sinValue + m[2] * cosValue, m[1] * -sinValue + m[3] * cosValue, m[4], m[5]];

    this._originalRotate(angle);
  };
}

class CachedCanvases {
  constructor(canvasFactory) {
    this.canvasFactory = canvasFactory;
    this.cache = Object.create(null);
  }

  getCanvas(id, width, height, trackTransform) {
    let canvasEntry;

    if (this.cache[id] !== undefined) {
      canvasEntry = this.cache[id];
      this.canvasFactory.reset(canvasEntry, width, height);
      canvasEntry.context.setTransform(1, 0, 0, 1, 0, 0);
    } else {
      canvasEntry = this.canvasFactory.create(width, height);
      this.cache[id] = canvasEntry;
    }

    if (trackTransform) {
      addContextCurrentTransform(canvasEntry.context);
    }

    return canvasEntry;
  }

  clear() {
    for (const id in this.cache) {
      const canvasEntry = this.cache[id];
      this.canvasFactory.destroy(canvasEntry);
      delete this.cache[id];
    }
  }

}

function compileType3Glyph(imgData) {
  const POINT_TO_PROCESS_LIMIT = 1000;
  const POINT_TYPES = new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]);
  const width = imgData.width,
        height = imgData.height,
        width1 = width + 1;
  let i, ii, j, j0;
  const points = new Uint8Array(width1 * (height + 1));
  const lineSize = width + 7 & ~7,
        data0 = imgData.data;
  const data = new Uint8Array(lineSize * height);
  let pos = 0;

  for (i = 0, ii = data0.length; i < ii; i++) {
    const elem = data0[i];
    let mask = 128;

    while (mask > 0) {
      data[pos++] = elem & mask ? 0 : 255;
      mask >>= 1;
    }
  }

  let count = 0;
  pos = 0;

  if (data[pos] !== 0) {
    points[0] = 1;
    ++count;
  }

  for (j = 1; j < width; j++) {
    if (data[pos] !== data[pos + 1]) {
      points[j] = data[pos] ? 2 : 1;
      ++count;
    }

    pos++;
  }

  if (data[pos] !== 0) {
    points[j] = 2;
    ++count;
  }

  for (i = 1; i < height; i++) {
    pos = i * lineSize;
    j0 = i * width1;

    if (data[pos - lineSize] !== data[pos]) {
      points[j0] = data[pos] ? 1 : 8;
      ++count;
    }

    let sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0);

    for (j = 1; j < width; j++) {
      sum = (sum >> 2) + (data[pos + 1] ? 4 : 0) + (data[pos - lineSize + 1] ? 8 : 0);

      if (POINT_TYPES[sum]) {
        points[j0 + j] = POINT_TYPES[sum];
        ++count;
      }

      pos++;
    }

    if (data[pos - lineSize] !== data[pos]) {
      points[j0 + j] = data[pos] ? 2 : 4;
      ++count;
    }

    if (count > POINT_TO_PROCESS_LIMIT) {
      return null;
    }
  }

  pos = lineSize * (height - 1);
  j0 = i * width1;

  if (data[pos] !== 0) {
    points[j0] = 8;
    ++count;
  }

  for (j = 1; j < width; j++) {
    if (data[pos] !== data[pos + 1]) {
      points[j0 + j] = data[pos] ? 4 : 8;
      ++count;
    }

    pos++;
  }

  if (data[pos] !== 0) {
    points[j0 + j] = 4;
    ++count;
  }

  if (count > POINT_TO_PROCESS_LIMIT) {
    return null;
  }

  const steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]);
  const outlines = [];

  for (i = 0; count && i <= height; i++) {
    let p = i * width1;
    const end = p + width;

    while (p < end && !points[p]) {
      p++;
    }

    if (p === end) {
      continue;
    }

    const coords = [p % width1, i];
    const p0 = p;
    let type = points[p];

    do {
      const step = steps[type];

      do {
        p += step;
      } while (!points[p]);

      const pp = points[p];

      if (pp !== 5 && pp !== 10) {
        type = pp;
        points[p] = 0;
      } else {
        type = pp & 0x33 * type >> 4;
        points[p] &= type >> 2 | type << 2;
      }

      coords.push(p % width1, p / width1 | 0);

      if (!points[p]) {
        --count;
      }
    } while (p0 !== p);

    outlines.push(coords);
    --i;
  }

  const drawOutline = function (c) {
    c.save();
    c.scale(1 / width, -1 / height);
    c.translate(0, -height);
    c.beginPath();

    for (let k = 0, kk = outlines.length; k < kk; k++) {
      const o = outlines[k];
      c.moveTo(o[0], o[1]);

      for (let l = 2, ll = o.length; l < ll; l += 2) {
        c.lineTo(o[l], o[l + 1]);
      }
    }

    c.fill();
    c.beginPath();
    c.restore();
  };

  return drawOutline;
}

class CanvasExtraState {
  constructor(width, height) {
    this.alphaIsShape = false;
    this.fontSize = 0;
    this.fontSizeScale = 1;
    this.textMatrix = _util.IDENTITY_MATRIX;
    this.textMatrixScale = 1;
    this.fontMatrix = _util.FONT_IDENTITY_MATRIX;
    this.leading = 0;
    this.x = 0;
    this.y = 0;
    this.lineX = 0;
    this.lineY = 0;
    this.charSpacing = 0;
    this.wordSpacing = 0;
    this.textHScale = 1;
    this.textRenderingMode = _util.TextRenderingMode.FILL;
    this.textRise = 0;
    this.fillColor = "#000000";
    this.strokeColor = "#000000";
    this.patternFill = false;
    this.fillAlpha = 1;
    this.strokeAlpha = 1;
    this.lineWidth = 1;
    this.activeSMask = null;
    this.transferMaps = null;
    this.startNewPathAndClipBox([0, 0, width, height]);
  }

  clone() {
    const clone = Object.create(this);
    clone.clipBox = this.clipBox.slice();
    return clone;
  }

  setCurrentPoint(x, y) {
    this.x = x;
    this.y = y;
  }

  updatePathMinMax(transform, x, y) {
    [x, y] = _util.Util.applyTransform([x, y], transform);
    this.minX = Math.min(this.minX, x);
    this.minY = Math.min(this.minY, y);
    this.maxX = Math.max(this.maxX, x);
    this.maxY = Math.max(this.maxY, y);
  }

  updateCurvePathMinMax(transform, x0, y0, x1, y1, x2, y2, x3, y3) {
    const box = _util.Util.bezierBoundingBox(x0, y0, x1, y1, x2, y2, x3, y3);

    this.updatePathMinMax(transform, box[0], box[1]);
    this.updatePathMinMax(transform, box[2], box[3]);
  }

  getPathBoundingBox(pathType = _pattern_helper.PathType.FILL, transform = null) {
    const box = [this.minX, this.minY, this.maxX, this.maxY];

    if (pathType === _pattern_helper.PathType.STROKE) {
      if (!transform) {
        (0, _util.unreachable)("Stroke bounding box must include transform.");
      }

      const scale = _util.Util.singularValueDecompose2dScale(transform);

      const xStrokePad = scale[0] * this.lineWidth / 2;
      const yStrokePad = scale[1] * this.lineWidth / 2;
      box[0] -= xStrokePad;
      box[1] -= yStrokePad;
      box[2] += xStrokePad;
      box[3] += yStrokePad;
    }

    return box;
  }

  updateClipFromPath() {
    const intersect = _util.Util.intersect(this.clipBox, this.getPathBoundingBox());

    this.startNewPathAndClipBox(intersect || [0, 0, 0, 0]);
  }

  startNewPathAndClipBox(box) {
    this.clipBox = box;
    this.minX = Infinity;
    this.minY = Infinity;
    this.maxX = 0;
    this.maxY = 0;
  }

  getClippedPathBoundingBox(pathType = _pattern_helper.PathType.FILL, transform = null) {
    return _util.Util.intersect(this.clipBox, this.getPathBoundingBox(pathType, transform));
  }

}

function putBinaryImageData(ctx, imgData, transferMaps = null) {
  if (typeof ImageData !== "undefined" && imgData instanceof ImageData) {
    ctx.putImageData(imgData, 0, 0);
    return;
  }

  const height = imgData.height,
        width = imgData.width;
  const partialChunkHeight = height % FULL_CHUNK_HEIGHT;
  const fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;
  const totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;
  const chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);
  let srcPos = 0,
      destPos;
  const src = imgData.data;
  const dest = chunkImgData.data;
  let i, j, thisChunkHeight, elemsInThisChunk;
  let transferMapRed, transferMapGreen, transferMapBlue, transferMapGray;

  if (transferMaps) {
    switch (transferMaps.length) {
      case 1:
        transferMapRed = transferMaps[0];
        transferMapGreen = transferMaps[0];
        transferMapBlue = transferMaps[0];
        transferMapGray = transferMaps[0];
        break;

      case 4:
        transferMapRed = transferMaps[0];
        transferMapGreen = transferMaps[1];
        transferMapBlue = transferMaps[2];
        transferMapGray = transferMaps[3];
        break;
    }
  }

  if (imgData.kind === _util.ImageKind.GRAYSCALE_1BPP) {
    const srcLength = src.byteLength;
    const dest32 = new Uint32Array(dest.buffer, 0, dest.byteLength >> 2);
    const dest32DataLength = dest32.length;
    const fullSrcDiff = width + 7 >> 3;
    let white = 0xffffffff;
    let black = _util.IsLittleEndianCached.value ? 0xff000000 : 0x000000ff;

    if (transferMapGray) {
      if (transferMapGray[0] === 0xff && transferMapGray[0xff] === 0) {
        [white, black] = [black, white];
      }
    }

    for (i = 0; i < totalChunks; i++) {
      thisChunkHeight = i < fullChunks ? FULL_CHUNK_HEIGHT : partialChunkHeight;
      destPos = 0;

      for (j = 0; j < thisChunkHeight; j++) {
        const srcDiff = srcLength - srcPos;
        let k = 0;
        const kEnd = srcDiff > fullSrcDiff ? width : srcDiff * 8 - 7;
        const kEndUnrolled = kEnd & ~7;
        let mask = 0;
        let srcByte = 0;

        for (; k < kEndUnrolled; k += 8) {
          srcByte = src[srcPos++];
          dest32[destPos++] = srcByte & 128 ? white : black;
          dest32[destPos++] = srcByte & 64 ? white : black;
          dest32[destPos++] = srcByte & 32 ? white : black;
          dest32[destPos++] = srcByte & 16 ? white : black;
          dest32[destPos++] = srcByte & 8 ? white : black;
          dest32[destPos++] = srcByte & 4 ? white : black;
          dest32[destPos++] = srcByte & 2 ? white : black;
          dest32[destPos++] = srcByte & 1 ? white : black;
        }

        for (; k < kEnd; k++) {
          if (mask === 0) {
            srcByte = src[srcPos++];
            mask = 128;
          }

          dest32[destPos++] = srcByte & mask ? white : black;
          mask >>= 1;
        }
      }

      while (destPos < dest32DataLength) {
        dest32[destPos++] = 0;
      }

      ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
    }
  } else if (imgData.kind === _util.ImageKind.RGBA_32BPP) {
    const hasTransferMaps = !!(transferMapRed || transferMapGreen || transferMapBlue);
    j = 0;
    elemsInThisChunk = width * FULL_CHUNK_HEIGHT * 4;

    for (i = 0; i < fullChunks; i++) {
      dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));
      srcPos += elemsInThisChunk;

      if (hasTransferMaps) {
        for (let k = 0; k < elemsInThisChunk; k += 4) {
          if (transferMapRed) {
            dest[k + 0] = transferMapRed[dest[k + 0]];
          }

          if (transferMapGreen) {
            dest[k + 1] = transferMapGreen[dest[k + 1]];
          }

          if (transferMapBlue) {
            dest[k + 2] = transferMapBlue[dest[k + 2]];
          }
        }
      }

      ctx.putImageData(chunkImgData, 0, j);
      j += FULL_CHUNK_HEIGHT;
    }

    if (i < totalChunks) {
      elemsInThisChunk = width * partialChunkHeight * 4;
      dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk));

      if (hasTransferMaps) {
        for (let k = 0; k < elemsInThisChunk; k += 4) {
          if (transferMapRed) {
            dest[k + 0] = transferMapRed[dest[k + 0]];
          }

          if (transferMapGreen) {
            dest[k + 1] = transferMapGreen[dest[k + 1]];
          }

          if (transferMapBlue) {
            dest[k + 2] = transferMapBlue[dest[k + 2]];
          }
        }
      }

      ctx.putImageData(chunkImgData, 0, j);
    }
  } else if (imgData.kind === _util.ImageKind.RGB_24BPP) {
    const hasTransferMaps = !!(transferMapRed || transferMapGreen || transferMapBlue);
    thisChunkHeight = FULL_CHUNK_HEIGHT;
    elemsInThisChunk = width * thisChunkHeight;

    for (i = 0; i < totalChunks; i++) {
      if (i >= fullChunks) {
        thisChunkHeight = partialChunkHeight;
        elemsInThisChunk = width * thisChunkHeight;
      }

      destPos = 0;

      for (j = elemsInThisChunk; j--;) {
        dest[destPos++] = src[srcPos++];
        dest[destPos++] = src[srcPos++];
        dest[destPos++] = src[srcPos++];
        dest[destPos++] = 255;
      }

      if (hasTransferMaps) {
        for (let k = 0; k < destPos; k += 4) {
          if (transferMapRed) {
            dest[k + 0] = transferMapRed[dest[k + 0]];
          }

          if (transferMapGreen) {
            dest[k + 1] = transferMapGreen[dest[k + 1]];
          }

          if (transferMapBlue) {
            dest[k + 2] = transferMapBlue[dest[k + 2]];
          }
        }
      }

      ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
    }
  } else {
    throw new Error(`bad image kind: ${imgData.kind}`);
  }
}

function putBinaryImageMask(ctx, imgData) {
  const height = imgData.height,
        width = imgData.width;
  const partialChunkHeight = height % FULL_CHUNK_HEIGHT;
  const fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT;
  const totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1;
  const chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT);
  let srcPos = 0;
  const src = imgData.data;
  const dest = chunkImgData.data;

  for (let i = 0; i < totalChunks; i++) {
    const thisChunkHeight = i < fullChunks ? FULL_CHUNK_HEIGHT : partialChunkHeight;
    let destPos = 3;

    for (let j = 0; j < thisChunkHeight; j++) {
      let elem,
          mask = 0;

      for (let k = 0; k < width; k++) {
        if (!mask) {
          elem = src[srcPos++];
          mask = 128;
        }

        dest[destPos] = elem & mask ? 0 : 255;
        destPos += 4;
        mask >>= 1;
      }
    }

    ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT);
  }
}

function copyCtxState(sourceCtx, destCtx) {
  const properties = ["strokeStyle", "fillStyle", "fillRule", "globalAlpha", "lineWidth", "lineCap", "lineJoin", "miterLimit", "globalCompositeOperation", "font"];

  for (let i = 0, ii = properties.length; i < ii; i++) {
    const property = properties[i];

    if (sourceCtx[property] !== undefined) {
      destCtx[property] = sourceCtx[property];
    }
  }

  if (sourceCtx.setLineDash !== undefined) {
    destCtx.setLineDash(sourceCtx.getLineDash());
    destCtx.lineDashOffset = sourceCtx.lineDashOffset;
  }
}

function resetCtxToDefault(ctx) {
  ctx.strokeStyle = "#000000";
  ctx.fillStyle = "#000000";
  ctx.fillRule = "nonzero";
  ctx.globalAlpha = 1;
  ctx.lineWidth = 1;
  ctx.lineCap = "butt";
  ctx.lineJoin = "miter";
  ctx.miterLimit = 10;
  ctx.globalCompositeOperation = "source-over";
  ctx.font = "10px sans-serif";

  if (ctx.setLineDash !== undefined) {
    ctx.setLineDash([]);
    ctx.lineDashOffset = 0;
  }
}

function composeSMaskBackdrop(bytes, r0, g0, b0) {
  const length = bytes.length;

  for (let i = 3; i < length; i += 4) {
    const alpha = bytes[i];

    if (alpha === 0) {
      bytes[i - 3] = r0;
      bytes[i - 2] = g0;
      bytes[i - 1] = b0;
    } else if (alpha < 255) {
      const alpha_ = 255 - alpha;
      bytes[i - 3] = bytes[i - 3] * alpha + r0 * alpha_ >> 8;
      bytes[i - 2] = bytes[i - 2] * alpha + g0 * alpha_ >> 8;
      bytes[i - 1] = bytes[i - 1] * alpha + b0 * alpha_ >> 8;
    }
  }
}

function composeSMaskAlpha(maskData, layerData, transferMap) {
  const length = maskData.length;
  const scale = 1 / 255;

  for (let i = 3; i < length; i += 4) {
    const alpha = transferMap ? transferMap[maskData[i]] : maskData[i];
    layerData[i] = layerData[i] * alpha * scale | 0;
  }
}

function composeSMaskLuminosity(maskData, layerData, transferMap) {
  const length = maskData.length;

  for (let i = 3; i < length; i += 4) {
    const y = maskData[i - 3] * 77 + maskData[i - 2] * 152 + maskData[i - 1] * 28;
    layerData[i] = transferMap ? layerData[i] * transferMap[y >> 8] >> 8 : layerData[i] * y >> 16;
  }
}

function genericComposeSMask(maskCtx, layerCtx, width, height, subtype, backdrop, transferMap, layerOffsetX, layerOffsetY, maskOffsetX, maskOffsetY) {
  const hasBackdrop = !!backdrop;
  const r0 = hasBackdrop ? backdrop[0] : 0;
  const g0 = hasBackdrop ? backdrop[1] : 0;
  const b0 = hasBackdrop ? backdrop[2] : 0;
  let composeFn;

  if (subtype === "Luminosity") {
    composeFn = composeSMaskLuminosity;
  } else {
    composeFn = composeSMaskAlpha;
  }

  const PIXELS_TO_PROCESS = 1048576;
  const chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width));

  for (let row = 0; row < height; row += chunkSize) {
    const chunkHeight = Math.min(chunkSize, height - row);
    const maskData = maskCtx.getImageData(layerOffsetX - maskOffsetX, row + (layerOffsetY - maskOffsetY), width, chunkHeight);
    const layerData = layerCtx.getImageData(layerOffsetX, row + layerOffsetY, width, chunkHeight);

    if (hasBackdrop) {
      composeSMaskBackdrop(maskData.data, r0, g0, b0);
    }

    composeFn(maskData.data, layerData.data, transferMap);
    layerCtx.putImageData(layerData, layerOffsetX, row + layerOffsetY);
  }
}

function composeSMask(ctx, smask, layerCtx, layerBox) {
  const layerOffsetX = layerBox[0];
  const layerOffsetY = layerBox[1];
  const layerWidth = layerBox[2] - layerOffsetX;
  const layerHeight = layerBox[3] - layerOffsetY;

  if (layerWidth === 0 || layerHeight === 0) {
    return;
  }

  genericComposeSMask(smask.context, layerCtx, layerWidth, layerHeight, smask.subtype, smask.backdrop, smask.transferMap, layerOffsetX, layerOffsetY, smask.offsetX, smask.offsetY);
  ctx.save();
  ctx.globalAlpha = 1;
  ctx.globalCompositeOperation = "source-over";
  ctx.setTransform(1, 0, 0, 1, 0, 0);
  ctx.drawImage(layerCtx.canvas, 0, 0);
  ctx.restore();
}

function getImageSmoothingEnabled(transform, interpolate) {
  const scale = _util.Util.singularValueDecompose2dScale(transform);

  scale[0] = Math.fround(scale[0]);
  scale[1] = Math.fround(scale[1]);
  const actualScale = Math.fround((globalThis.devicePixelRatio || 1) * _display_utils.PixelsPerInch.PDF_TO_CSS_UNITS);

  if (interpolate !== undefined) {
    return interpolate;
  } else if (scale[0] <= actualScale || scale[1] <= actualScale) {
    return true;
  }

  return false;
}

const LINE_CAP_STYLES = ["butt", "round", "square"];
const LINE_JOIN_STYLES = ["miter", "round", "bevel"];
const NORMAL_CLIP = {};
const EO_CLIP = {};

class CanvasGraphics {
  constructor(canvasCtx, commonObjs, objs, canvasFactory, imageLayer, optionalContentConfig, annotationCanvasMap) {
    this.ctx = canvasCtx;
    this.current = new CanvasExtraState(this.ctx.canvas.width, this.ctx.canvas.height);
    this.stateStack = [];
    this.pendingClip = null;
    this.pendingEOFill = false;
    this.res = null;
    this.xobjs = null;
    this.commonObjs = commonObjs;
    this.objs = objs;
    this.canvasFactory = canvasFactory;
    this.imageLayer = imageLayer;
    this.groupStack = [];
    this.processingType3 = null;
    this.baseTransform = null;
    this.baseTransformStack = [];
    this.groupLevel = 0;
    this.smaskStack = [];
    this.smaskCounter = 0;
    this.tempSMask = null;
    this.suspendedCtx = null;
    this.contentVisible = true;
    this.markedContentStack = [];
    this.optionalContentConfig = optionalContentConfig;
    this.cachedCanvases = new CachedCanvases(this.canvasFactory);
    this.cachedPatterns = new Map();
    this.annotationCanvasMap = annotationCanvasMap;
    this.viewportScale = 1;
    this.outputScaleX = 1;
    this.outputScaleY = 1;

    if (canvasCtx) {
      addContextCurrentTransform(canvasCtx);
    }

    this._cachedGetSinglePixelWidth = null;
  }

  beginDrawing({
    transform,
    viewport,
    transparency = false,
    background = null
  }) {
    const width = this.ctx.canvas.width;
    const height = this.ctx.canvas.height;
    this.ctx.save();
    this.ctx.fillStyle = background || "rgb(255, 255, 255)";
    this.ctx.fillRect(0, 0, width, height);
    this.ctx.restore();

    if (transparency) {
      const transparentCanvas = this.cachedCanvases.getCanvas("transparent", width, height, true);
      this.compositeCtx = this.ctx;
      this.transparentCanvas = transparentCanvas.canvas;
      this.ctx = transparentCanvas.context;
      this.ctx.save();
      this.ctx.transform.apply(this.ctx, this.compositeCtx.mozCurrentTransform);
    }

    this.ctx.save();
    resetCtxToDefault(this.ctx);

    if (transform) {
      this.ctx.transform.apply(this.ctx, transform);
      this.outputScaleX = transform[0];
      this.outputScaleY = transform[0];
    }

    this.ctx.transform.apply(this.ctx, viewport.transform);
    this.viewportScale = viewport.scale;
    this.baseTransform = this.ctx.mozCurrentTransform.slice();
    this._combinedScaleFactor = Math.hypot(this.baseTransform[0], this.baseTransform[2]);

    if (this.imageLayer) {
      this.imageLayer.beginLayout();
    }
  }

  executeOperatorList(operatorList, executionStartIdx, continueCallback, stepper) {
    const argsArray = operatorList.argsArray;
    const fnArray = operatorList.fnArray;
    let i = executionStartIdx || 0;
    const argsArrayLen = argsArray.length;

    if (argsArrayLen === i) {
      return i;
    }

    const chunkOperations = argsArrayLen - i > EXECUTION_STEPS && typeof continueCallback === "function";
    const endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0;
    let steps = 0;
    const commonObjs = this.commonObjs;
    const objs = this.objs;
    let fnId;

    while (true) {
      if (stepper !== undefined && i === stepper.nextBreakPoint) {
        stepper.breakIt(i, continueCallback);
        return i;
      }

      fnId = fnArray[i];

      if (fnId !== _util.OPS.dependency) {
        this[fnId].apply(this, argsArray[i]);
      } else {
        for (const depObjId of argsArray[i]) {
          const objsPool = depObjId.startsWith("g_") ? commonObjs : objs;

          if (!objsPool.has(depObjId)) {
            objsPool.get(depObjId, continueCallback);
            return i;
          }
        }
      }

      i++;

      if (i === argsArrayLen) {
        return i;
      }

      if (chunkOperations && ++steps > EXECUTION_STEPS) {
        if (Date.now() > endTime) {
          continueCallback();
          return i;
        }

        steps = 0;
      }
    }
  }

  endDrawing() {
    while (this.stateStack.length || this.inSMaskMode) {
      this.restore();
    }

    this.ctx.restore();

    if (this.transparentCanvas) {
      this.ctx = this.compositeCtx;
      this.ctx.save();
      this.ctx.setTransform(1, 0, 0, 1, 0, 0);
      this.ctx.drawImage(this.transparentCanvas, 0, 0);
      this.ctx.restore();
      this.transparentCanvas = null;
    }

    this.cachedCanvases.clear();
    this.cachedPatterns.clear();

    if (this.imageLayer) {
      this.imageLayer.endLayout();
    }
  }

  _scaleImage(img, inverseTransform) {
    const width = img.width;
    const height = img.height;
    let widthScale = Math.max(Math.hypot(inverseTransform[0], inverseTransform[1]), 1);
    let heightScale = Math.max(Math.hypot(inverseTransform[2], inverseTransform[3]), 1);
    let paintWidth = width,
        paintHeight = height;
    let tmpCanvasId = "prescale1";
    let tmpCanvas, tmpCtx;

    while (widthScale > 2 && paintWidth > 1 || heightScale > 2 && paintHeight > 1) {
      let newWidth = paintWidth,
          newHeight = paintHeight;

      if (widthScale > 2 && paintWidth > 1) {
        newWidth = Math.ceil(paintWidth / 2);
        widthScale /= paintWidth / newWidth;
      }

      if (heightScale > 2 && paintHeight > 1) {
        newHeight = Math.ceil(paintHeight / 2);
        heightScale /= paintHeight / newHeight;
      }

      tmpCanvas = this.cachedCanvases.getCanvas(tmpCanvasId, newWidth, newHeight);
      tmpCtx = tmpCanvas.context;
      tmpCtx.clearRect(0, 0, newWidth, newHeight);
      tmpCtx.drawImage(img, 0, 0, paintWidth, paintHeight, 0, 0, newWidth, newHeight);
      img = tmpCanvas.canvas;
      paintWidth = newWidth;
      paintHeight = newHeight;
      tmpCanvasId = tmpCanvasId === "prescale1" ? "prescale2" : "prescale1";
    }

    return {
      img,
      paintWidth,
      paintHeight
    };
  }

  _createMaskCanvas(img) {
    const ctx = this.ctx;
    const width = img.width,
          height = img.height;
    const fillColor = this.current.fillColor;
    const isPatternFill = this.current.patternFill;
    const maskCanvas = this.cachedCanvases.getCanvas("maskCanvas", width, height);
    const maskCtx = maskCanvas.context;
    putBinaryImageMask(maskCtx, img);
    const objToCanvas = ctx.mozCurrentTransform;

    let maskToCanvas = _util.Util.transform(objToCanvas, [1 / width, 0, 0, -1 / height, 0, 0]);

    maskToCanvas = _util.Util.transform(maskToCanvas, [1, 0, 0, 1, 0, -height]);

    const cord1 = _util.Util.applyTransform([0, 0], maskToCanvas);

    const cord2 = _util.Util.applyTransform([width, height], maskToCanvas);

    const rect = _util.Util.normalizeRect([cord1[0], cord1[1], cord2[0], cord2[1]]);

    const drawnWidth = Math.ceil(rect[2] - rect[0]);
    const drawnHeight = Math.ceil(rect[3] - rect[1]);
    const fillCanvas = this.cachedCanvases.getCanvas("fillCanvas", drawnWidth, drawnHeight, true);
    const fillCtx = fillCanvas.context;
    const offsetX = Math.min(cord1[0], cord2[0]);
    const offsetY = Math.min(cord1[1], cord2[1]);
    fillCtx.translate(-offsetX, -offsetY);
    fillCtx.transform.apply(fillCtx, maskToCanvas);

    const scaled = this._scaleImage(maskCanvas.canvas, fillCtx.mozCurrentTransformInverse);

    fillCtx.imageSmoothingEnabled = getImageSmoothingEnabled(fillCtx.mozCurrentTransform, img.interpolate);
    fillCtx.drawImage(scaled.img, 0, 0, scaled.img.width, scaled.img.height, 0, 0, width, height);
    fillCtx.globalCompositeOperation = "source-in";

    const inverse = _util.Util.transform(fillCtx.mozCurrentTransformInverse, [1, 0, 0, 1, -offsetX, -offsetY]);

    fillCtx.fillStyle = isPatternFill ? fillColor.getPattern(ctx, this, inverse, _pattern_helper.PathType.FILL) : fillColor;
    fillCtx.fillRect(0, 0, width, height);
    return {
      canvas: fillCanvas.canvas,
      offsetX: Math.round(offsetX),
      offsetY: Math.round(offsetY)
    };
  }

  setLineWidth(width) {
    this.current.lineWidth = width;
    this.ctx.lineWidth = width;
  }

  setLineCap(style) {
    this.ctx.lineCap = LINE_CAP_STYLES[style];
  }

  setLineJoin(style) {
    this.ctx.lineJoin = LINE_JOIN_STYLES[style];
  }

  setMiterLimit(limit) {
    this.ctx.miterLimit = limit;
  }

  setDash(dashArray, dashPhase) {
    const ctx = this.ctx;

    if (ctx.setLineDash !== undefined) {
      ctx.setLineDash(dashArray);
      ctx.lineDashOffset = dashPhase;
    }
  }

  setRenderingIntent(intent) {}

  setFlatness(flatness) {}

  setGState(states) {
    for (let i = 0, ii = states.length; i < ii; i++) {
      const state = states[i];
      const key = state[0];
      const value = state[1];

      switch (key) {
        case "LW":
          this.setLineWidth(value);
          break;

        case "LC":
          this.setLineCap(value);
          break;

        case "LJ":
          this.setLineJoin(value);
          break;

        case "ML":
          this.setMiterLimit(value);
          break;

        case "D":
          this.setDash(value[0], value[1]);
          break;

        case "RI":
          this.setRenderingIntent(value);
          break;

        case "FL":
          this.setFlatness(value);
          break;

        case "Font":
          this.setFont(value[0], value[1]);
          break;

        case "CA":
          this.current.strokeAlpha = state[1];
          break;

        case "ca":
          this.current.fillAlpha = state[1];
          this.ctx.globalAlpha = state[1];
          break;

        case "BM":
          this.ctx.globalCompositeOperation = value;
          break;

        case "SMask":
          this.current.activeSMask = value ? this.tempSMask : null;
          this.tempSMask = null;
          this.checkSMaskState();
          break;

        case "TR":
          this.current.transferMaps = value;
      }
    }
  }

  get inSMaskMode() {
    return !!this.suspendedCtx;
  }

  checkSMaskState() {
    const inSMaskMode = this.inSMaskMode;

    if (this.current.activeSMask && !inSMaskMode) {
      this.beginSMaskMode();
    } else if (!this.current.activeSMask && inSMaskMode) {
      this.endSMaskMode();
    }
  }

  beginSMaskMode() {
    if (this.inSMaskMode) {
      throw new Error("beginSMaskMode called while already in smask mode");
    }

    const drawnWidth = this.ctx.canvas.width;
    const drawnHeight = this.ctx.canvas.height;
    const cacheId = "smaskGroupAt" + this.groupLevel;
    const scratchCanvas = this.cachedCanvases.getCanvas(cacheId, drawnWidth, drawnHeight, true);
    this.suspendedCtx = this.ctx;
    this.ctx = scratchCanvas.context;
    const ctx = this.ctx;
    ctx.setTransform.apply(ctx, this.suspendedCtx.mozCurrentTransform);
    copyCtxState(this.suspendedCtx, ctx);
    mirrorContextOperations(ctx, this.suspendedCtx);
    this.setGState([["BM", "source-over"], ["ca", 1], ["CA", 1]]);
  }

  endSMaskMode() {
    if (!this.inSMaskMode) {
      throw new Error("endSMaskMode called while not in smask mode");
    }

    this.ctx._removeMirroring();

    copyCtxState(this.ctx, this.suspendedCtx);
    this.ctx = this.suspendedCtx;
    this.suspendedCtx = null;
  }

  compose(dirtyBox) {
    if (!this.current.activeSMask) {
      return;
    }

    if (!dirtyBox) {
      dirtyBox = [0, 0, this.ctx.canvas.width, this.ctx.canvas.height];
    } else {
      dirtyBox[0] = Math.floor(dirtyBox[0]);
      dirtyBox[1] = Math.floor(dirtyBox[1]);
      dirtyBox[2] = Math.ceil(dirtyBox[2]);
      dirtyBox[3] = Math.ceil(dirtyBox[3]);
    }

    const smask = this.current.activeSMask;
    const suspendedCtx = this.suspendedCtx;
    composeSMask(suspendedCtx, smask, this.ctx, dirtyBox);
    this.ctx.save();
    this.ctx.setTransform(1, 0, 0, 1, 0, 0);
    this.ctx.clearRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.height);
    this.ctx.restore();
  }

  save() {
    if (this.inSMaskMode) {
      copyCtxState(this.ctx, this.suspendedCtx);
      this.suspendedCtx.save();
    } else {
      this.ctx.save();
    }

    const old = this.current;
    this.stateStack.push(old);
    this.current = old.clone();
  }

  restore() {
    if (this.stateStack.length === 0 && this.inSMaskMode) {
      this.endSMaskMode();
    }

    if (this.stateStack.length !== 0) {
      this.current = this.stateStack.pop();

      if (this.inSMaskMode) {
        this.suspendedCtx.restore();
        copyCtxState(this.suspendedCtx, this.ctx);
      } else {
        this.ctx.restore();
      }

      this.checkSMaskState();
      this.pendingClip = null;
      this._cachedGetSinglePixelWidth = null;
    }
  }

  transform(a, b, c, d, e, f) {
    this.ctx.transform(a, b, c, d, e, f);
    this._cachedGetSinglePixelWidth = null;
  }

  constructPath(ops, args) {
    const ctx = this.ctx;
    const current = this.current;
    let x = current.x,
        y = current.y;
    let startX, startY;

    for (let i = 0, j = 0, ii = ops.length; i < ii; i++) {
      switch (ops[i] | 0) {
        case _util.OPS.rectangle:
          x = args[j++];
          y = args[j++];
          const width = args[j++];
          const height = args[j++];
          const xw = x + width;
          const yh = y + height;
          ctx.moveTo(x, y);

          if (width === 0 || height === 0) {
            ctx.lineTo(xw, yh);
          } else {
            ctx.lineTo(xw, y);
            ctx.lineTo(xw, yh);
            ctx.lineTo(x, yh);
          }

          current.updatePathMinMax(ctx.mozCurrentTransform, x, y);
          current.updatePathMinMax(ctx.mozCurrentTransform, xw, yh);
          ctx.closePath();
          break;

        case _util.OPS.moveTo:
          x = args[j++];
          y = args[j++];
          ctx.moveTo(x, y);
          current.updatePathMinMax(ctx.mozCurrentTransform, x, y);
          break;

        case _util.OPS.lineTo:
          x = args[j++];
          y = args[j++];
          ctx.lineTo(x, y);
          current.updatePathMinMax(ctx.mozCurrentTransform, x, y);
          break;

        case _util.OPS.curveTo:
          startX = x;
          startY = y;
          x = args[j + 4];
          y = args[j + 5];
          ctx.bezierCurveTo(args[j], args[j + 1], args[j + 2], args[j + 3], x, y);
          current.updateCurvePathMinMax(ctx.mozCurrentTransform, startX, startY, args[j], args[j + 1], args[j + 2], args[j + 3], x, y);
          j += 6;
          break;

        case _util.OPS.curveTo2:
          startX = x;
          startY = y;
          ctx.bezierCurveTo(x, y, args[j], args[j + 1], args[j + 2], args[j + 3]);
          current.updateCurvePathMinMax(ctx.mozCurrentTransform, startX, startY, x, y, args[j], args[j + 1], args[j + 2], args[j + 3]);
          x = args[j + 2];
          y = args[j + 3];
          j += 4;
          break;

        case _util.OPS.curveTo3:
          startX = x;
          startY = y;
          x = args[j + 2];
          y = args[j + 3];
          ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y);
          current.updateCurvePathMinMax(ctx.mozCurrentTransform, startX, startY, args[j], args[j + 1], x, y, x, y);
          j += 4;
          break;

        case _util.OPS.closePath:
          ctx.closePath();
          break;
      }
    }

    current.setCurrentPoint(x, y);
  }

  closePath() {
    this.ctx.closePath();
  }

  stroke(consumePath) {
    consumePath = typeof consumePath !== "undefined" ? consumePath : true;
    const ctx = this.ctx;
    const strokeColor = this.current.strokeColor;
    ctx.globalAlpha = this.current.strokeAlpha;

    if (this.contentVisible) {
      if (typeof strokeColor === "object" && strokeColor?.getPattern) {
        const lineWidth = this.getSinglePixelWidth();
        ctx.save();
        ctx.strokeStyle = strokeColor.getPattern(ctx, this, ctx.mozCurrentTransformInverse, _pattern_helper.PathType.STROKE);
        ctx.lineWidth = Math.max(lineWidth, this.current.lineWidth);
        ctx.stroke();
        ctx.restore();
      } else {
        const lineWidth = this.getSinglePixelWidth();

        if (lineWidth < 0 && -lineWidth >= this.current.lineWidth) {
          ctx.save();
          ctx.resetTransform();
          ctx.lineWidth = Math.floor(this._combinedScaleFactor);
          ctx.stroke();
          ctx.restore();
        } else {
          ctx.lineWidth = Math.max(lineWidth, this.current.lineWidth);
          ctx.stroke();
        }
      }
    }

    if (consumePath) {
      this.consumePath(this.current.getClippedPathBoundingBox());
    }

    ctx.globalAlpha = this.current.fillAlpha;
  }

  closeStroke() {
    this.closePath();
    this.stroke();
  }

  fill(consumePath) {
    consumePath = typeof consumePath !== "undefined" ? consumePath : true;
    const ctx = this.ctx;
    const fillColor = this.current.fillColor;
    const isPatternFill = this.current.patternFill;
    let needRestore = false;

    if (isPatternFill) {
      ctx.save();
      ctx.fillStyle = fillColor.getPattern(ctx, this, ctx.mozCurrentTransformInverse, _pattern_helper.PathType.FILL);
      needRestore = true;
    }

    const intersect = this.current.getClippedPathBoundingBox();

    if (this.contentVisible && intersect !== null) {
      if (this.pendingEOFill) {
        ctx.fill("evenodd");
        this.pendingEOFill = false;
      } else {
        ctx.fill();
      }
    }

    if (needRestore) {
      ctx.restore();
    }

    if (consumePath) {
      this.consumePath(intersect);
    }
  }

  eoFill() {
    this.pendingEOFill = true;
    this.fill();
  }

  fillStroke() {
    this.fill(false);
    this.stroke(false);
    this.consumePath();
  }

  eoFillStroke() {
    this.pendingEOFill = true;
    this.fillStroke();
  }

  closeFillStroke() {
    this.closePath();
    this.fillStroke();
  }

  closeEOFillStroke() {
    this.pendingEOFill = true;
    this.closePath();
    this.fillStroke();
  }

  endPath() {
    this.consumePath();
  }

  clip() {
    this.pendingClip = NORMAL_CLIP;
  }

  eoClip() {
    this.pendingClip = EO_CLIP;
  }

  beginText() {
    this.current.textMatrix = _util.IDENTITY_MATRIX;
    this.current.textMatrixScale = 1;
    this.current.x = this.current.lineX = 0;
    this.current.y = this.current.lineY = 0;
  }

  endText() {
    const paths = this.pendingTextPaths;
    const ctx = this.ctx;

    if (paths === undefined) {
      ctx.beginPath();
      return;
    }

    ctx.save();
    ctx.beginPath();

    for (let i = 0; i < paths.length; i++) {
      const path = paths[i];
      ctx.setTransform.apply(ctx, path.transform);
      ctx.translate(path.x, path.y);
      path.addToPath(ctx, path.fontSize);
    }

    ctx.restore();
    ctx.clip();
    ctx.beginPath();
    delete this.pendingTextPaths;
  }

  setCharSpacing(spacing) {
    this.current.charSpacing = spacing;
  }

  setWordSpacing(spacing) {
    this.current.wordSpacing = spacing;
  }

  setHScale(scale) {
    this.current.textHScale = scale / 100;
  }

  setLeading(leading) {
    this.current.leading = -leading;
  }

  setFont(fontRefName, size) {
    const fontObj = this.commonObjs.get(fontRefName);
    const current = this.current;

    if (!fontObj) {
      throw new Error(`Can't find font for ${fontRefName}`);
    }

    current.fontMatrix = fontObj.fontMatrix || _util.FONT_IDENTITY_MATRIX;

    if (current.fontMatrix[0] === 0 || current.fontMatrix[3] === 0) {
      (0, _util.warn)("Invalid font matrix for font " + fontRefName);
    }

    if (size < 0) {
      size = -size;
      current.fontDirection = -1;
    } else {
      current.fontDirection = 1;
    }

    this.current.font = fontObj;
    this.current.fontSize = size;

    if (fontObj.isType3Font) {
      return;
    }

    const name = fontObj.loadedName || "sans-serif";
    let bold = "normal";

    if (fontObj.black) {
      bold = "900";
    } else if (fontObj.bold) {
      bold = "bold";
    }

    const italic = fontObj.italic ? "italic" : "normal";
    const typeface = `"${name}", ${fontObj.fallbackName}`;
    let browserFontSize = size;

    if (size < MIN_FONT_SIZE) {
      browserFontSize = MIN_FONT_SIZE;
    } else if (size > MAX_FONT_SIZE) {
      browserFontSize = MAX_FONT_SIZE;
    }

    this.current.fontSizeScale = size / browserFontSize;
    this.ctx.font = `${italic} ${bold} ${browserFontSize}px ${typeface}`;
  }

  setTextRenderingMode(mode) {
    this.current.textRenderingMode = mode;
  }

  setTextRise(rise) {
    this.current.textRise = rise;
  }

  moveText(x, y) {
    this.current.x = this.current.lineX += x;
    this.current.y = this.current.lineY += y;
  }

  setLeadingMoveText(x, y) {
    this.setLeading(-y);
    this.moveText(x, y);
  }

  setTextMatrix(a, b, c, d, e, f) {
    this.current.textMatrix = [a, b, c, d, e, f];
    this.current.textMatrixScale = Math.hypot(a, b);
    this.current.x = this.current.lineX = 0;
    this.current.y = this.current.lineY = 0;
  }

  nextLine() {
    this.moveText(0, this.current.leading);
  }

  paintChar(character, x, y, patternTransform, resetLineWidthToOne) {
    const ctx = this.ctx;
    const current = this.current;
    const font = current.font;
    const textRenderingMode = current.textRenderingMode;
    const fontSize = current.fontSize / current.fontSizeScale;
    const fillStrokeMode = textRenderingMode & _util.TextRenderingMode.FILL_STROKE_MASK;
    const isAddToPathSet = !!(textRenderingMode & _util.TextRenderingMode.ADD_TO_PATH_FLAG);
    const patternFill = current.patternFill && !font.missingFile;
    let addToPath;

    if (font.disableFontFace || isAddToPathSet || patternFill) {
      addToPath = font.getPathGenerator(this.commonObjs, character);
    }

    if (font.disableFontFace || patternFill) {
      ctx.save();
      ctx.translate(x, y);
      ctx.beginPath();
      addToPath(ctx, fontSize);

      if (patternTransform) {
        ctx.setTransform.apply(ctx, patternTransform);
      }

      if (fillStrokeMode === _util.TextRenderingMode.FILL || fillStrokeMode === _util.TextRenderingMode.FILL_STROKE) {
        ctx.fill();
      }

      if (fillStrokeMode === _util.TextRenderingMode.STROKE || fillStrokeMode === _util.TextRenderingMode.FILL_STROKE) {
        if (resetLineWidthToOne) {
          ctx.resetTransform();
          ctx.lineWidth = Math.floor(this._combinedScaleFactor);
        }

        ctx.stroke();
      }

      ctx.restore();
    } else {
      if (fillStrokeMode === _util.TextRenderingMode.FILL || fillStrokeMode === _util.TextRenderingMode.FILL_STROKE) {
        ctx.fillText(character, x, y);
      }

      if (fillStrokeMode === _util.TextRenderingMode.STROKE || fillStrokeMode === _util.TextRenderingMode.FILL_STROKE) {
        if (resetLineWidthToOne) {
          ctx.save();
          ctx.moveTo(x, y);
          ctx.resetTransform();
          ctx.lineWidth = Math.floor(this._combinedScaleFactor);
          ctx.strokeText(character, 0, 0);
          ctx.restore();
        } else {
          ctx.strokeText(character, x, y);
        }
      }
    }

    if (isAddToPathSet) {
      const paths = this.pendingTextPaths || (this.pendingTextPaths = []);
      paths.push({
        transform: ctx.mozCurrentTransform,
        x,
        y,
        fontSize,
        addToPath
      });
    }
  }

  get isFontSubpixelAAEnabled() {
    const {
      context: ctx
    } = this.cachedCanvases.getCanvas("isFontSubpixelAAEnabled", 10, 10);
    ctx.scale(1.5, 1);
    ctx.fillText("I", 0, 10);
    const data = ctx.getImageData(0, 0, 10, 10).data;
    let enabled = false;

    for (let i = 3; i < data.length; i += 4) {
      if (data[i] > 0 && data[i] < 255) {
        enabled = true;
        break;
      }
    }

    return (0, _util.shadow)(this, "isFontSubpixelAAEnabled", enabled);
  }

  showText(glyphs) {
    const current = this.current;
    const font = current.font;

    if (font.isType3Font) {
      return this.showType3Text(glyphs);
    }

    const fontSize = current.fontSize;

    if (fontSize === 0) {
      return undefined;
    }

    const ctx = this.ctx;
    const fontSizeScale = current.fontSizeScale;
    const charSpacing = current.ch