text: /**
   * @licstart The following is the entire license notice for the
   * Javascript code in this page
   *
   * Copyright 2020 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.getShadingPatternFromIR = getShadingPatternFromIR;
  exports.TilingPattern = void 0;
  
  var _util_metapdf = require("../shared/util_metapdf.js");
  
  var ShadingIRs = {};
  
  function applyBoundingBox(ctx, bbox) {
    if (!bbox || typeof Path2D === "undefined") {
      return;
    }
  
    var width = bbox[2] - bbox[0];
    var height = bbox[3] - bbox[1];
    var region = new Path2D();
    region.rect(bbox[0], bbox[1], width, height);
    ctx.clip(region);
  }
  
  ShadingIRs.RadialAxial = {
    fromIR: function RadialAxial_fromIR(raw) {
      var type = raw[1];
      var bbox = raw[2];
      var colorStops = raw[3];
      var p0 = raw[4];
      var p1 = raw[5];
      var r0 = raw[6];
      var r1 = raw[7];
      return {
        getPattern: function RadialAxial_getPattern(ctx) {
          applyBoundingBox(ctx, bbox);
          var grad;
  
          if (type === "axial") {
            grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);
          } else if (type === "radial") {
            grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1);
          }
  
          for (var i = 0, ii = colorStops.length; i < ii; ++i) {
            var c = colorStops[i];
            grad.addColorStop(c[0], c[1]);
          }
  
          return grad;
        }
      };
    }
  };
  
  var createMeshCanvas = function createMeshCanvasClosure() {
    function drawTriangle(data, context, p1, p2, p3, c1, c2, c3) {
      var coords = context.coords,
          colors = context.colors;
      var bytes = data.data,
          rowSize = data.width * 4;
      var tmp;
  
      if (coords[p1 + 1] > coords[p2 + 1]) {
        tmp = p1;
        p1 = p2;
        p2 = tmp;
        tmp = c1;
        c1 = c2;
        c2 = tmp;
      }
  
      if (coords[p2 + 1] > coords[p3 + 1]) {
        tmp = p2;
        p2 = p3;
        p3 = tmp;
        tmp = c2;
        c2 = c3;
        c3 = tmp;
      }
  
      if (coords[p1 + 1] > coords[p2 + 1]) {
        tmp = p1;
        p1 = p2;
        p2 = tmp;
        tmp = c1;
        c1 = c2;
        c2 = tmp;
      }
  
      var x1 = (coords[p1] + context.offsetX) * context.scaleX;
      var y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY;
      var x2 = (coords[p2] + context.offsetX) * context.scaleX;
      var y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY;
      var x3 = (coords[p3] + context.offsetX) * context.scaleX;
      var y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY;
  
      if (y1 >= y3) {
        return;
      }
  
      var c1r = colors[c1],
          c1g = colors[c1 + 1],
          c1b = colors[c1 + 2];
      var c2r = colors[c2],
          c2g = colors[c2 + 1],
          c2b = colors[c2 + 2];
      var c3r = colors[c3],
          c3g = colors[c3 + 1],
          c3b = colors[c3 + 2];
      var minY = Math.round(y1),
          maxY = Math.round(y3);
      var xa, car, cag, cab;
      var xb, cbr, cbg, cbb;
  
      for (var y = minY; y <= maxY; y++) {
        if (y < y2) {
          var _k = void 0;
  
          if (y < y1) {
            _k = 0;
          } else if (y1 === y2) {
            _k = 1;
          } else {
            _k = (y1 - y) / (y1 - y2);
          }
  
          xa = x1 - (x1 - x2) * _k;
          car = c1r - (c1r - c2r) * _k;
          cag = c1g - (c1g - c2g) * _k;
          cab = c1b - (c1b - c2b) * _k;
        } else {
          var _k2 = void 0;
  
          if (y > y3) {
            _k2 = 1;
          } else if (y2 === y3) {
            _k2 = 0;
          } else {
            _k2 = (y2 - y) / (y2 - y3);
          }
  
          xa = x2 - (x2 - x3) * _k2;
          car = c2r - (c2r - c3r) * _k2;
          cag = c2g - (c2g - c3g) * _k2;
          cab = c2b - (c2b - c3b) * _k2;
        }
  
        var k = void 0;
  
        if (y < y1) {
          k = 0;
        } else if (y > y3) {
          k = 1;
        } else {
          k = (y1 - y) / (y1 - y3);
        }
  
        xb = x1 - (x1 - x3) * k;
        cbr = c1r - (c1r - c3r) * k;
        cbg = c1g - (c1g - c3g) * k;
        cbb = c1b - (c1b - c3b) * k;
        var x1_ = Math.round(Math.min(xa, xb));
        var x2_ = Math.round(Math.max(xa, xb));
        var j = rowSize * y + x1_ * 4;
  
        for (var x = x1_; x <= x2_; x++) {
          k = (xa - x) / (xa - xb);
  
          if (k < 0) {
            k = 0;
          } else if (k > 1) {
            k = 1;
          }
  
          bytes[j++] = car - (car - cbr) * k | 0;
          bytes[j++] = cag - (cag - cbg) * k | 0;
          bytes[j++] = cab - (cab - cbb) * k | 0;
          bytes[j++] = 255;
        }
      }
    }
  
    function drawFigure(data, figure, context) {
      var ps = figure.coords;
      var cs = figure.colors;
      var i, ii;
  
      switch (figure.type) {
        case "lattice":
          var verticesPerRow = figure.verticesPerRow;
          var rows = Math.floor(ps.length / verticesPerRow) - 1;
          var cols = verticesPerRow - 1;
  
          for (i = 0; i < rows; i++) {
            var q = i * verticesPerRow;
  
            for (var j = 0; j < cols; j++, q++) {
              drawTriangle(data, context, ps[q], ps[q + 1], ps[q + verticesPerRow], cs[q], cs[q + 1], cs[q + verticesPerRow]);
              drawTriangle(data, context, ps[q + verticesPerRow + 1], ps[q + 1], ps[q + verticesPerRow], cs[q + verticesPerRow + 1], cs[q + 1], cs[q + verticesPerRow]);
            }
          }
  
          break;
  
        case "triangles":
          for (i = 0, ii = ps.length; i < ii; i += 3) {
            drawTriangle(data, context, ps[i], ps[i + 1], ps[i + 2], cs[i], cs[i + 1], cs[i + 2]);
          }
  
          break;
  
        default:
          throw new Error("illegal figure");
      }
    }
  
    function createMeshCanvas(bounds, combinesScale, coords, colors, figures, backgroundColor, cachedCanvases, webGLContext) {
      var EXPECTED_SCALE = 1.1;
      var MAX_PATTERN_SIZE = 3000;
      var BORDER_SIZE = 2;
      var offsetX = Math.floor(bounds[0]);
      var offsetY = Math.floor(bounds[1]);
      var boundsWidth = Math.ceil(bounds[2]) - offsetX;
      var boundsHeight = Math.ceil(bounds[3]) - offsetY;
      var width = Math.min(Math.ceil(Math.abs(boundsWidth * combinesScale[0] * EXPECTED_SCALE)), MAX_PATTERN_SIZE);
      var height = Math.min(Math.ceil(Math.abs(boundsHeight * combinesScale[1] * EXPECTED_SCALE)), MAX_PATTERN_SIZE);
      var scaleX = boundsWidth / width;
      var scaleY = boundsHeight / height;
      var context = {
        coords: coords,
        colors: colors,
        offsetX: -offsetX,
        offsetY: -offsetY,
        scaleX: 1 / scaleX,
        scaleY: 1 / scaleY
      };
      var paddedWidth = width + BORDER_SIZE * 2;
      var paddedHeight = height + BORDER_SIZE * 2;
      var canvas, tmpCanvas, i, ii;
  
      if (webGLContext.isEnabled) {
        canvas = webGLContext.drawFigures({
          width: width,
          height: height,
          backgroundColor: backgroundColor,
          figures: figures,
          context: context
        });
        tmpCanvas = cachedCanvases.getCanvas("mesh", paddedWidth, paddedHeight, false);
        tmpCanvas.context.drawImage(canvas, BORDER_SIZE, BORDER_SIZE);
        canvas = tmpCanvas.canvas;
      } else {
        tmpCanvas = cachedCanvases.getCanvas("mesh", paddedWidth, paddedHeight, false);
        var tmpCtx = tmpCanvas.context;
        var data = tmpCtx.createImageData(width, height);
  
        if (backgroundColor) {
          var bytes = data.data;
  
          for (i = 0, ii = bytes.length; i < ii; i += 4) {
            bytes[i] = backgroundColor[0];
            bytes[i + 1] = backgroundColor[1];
            bytes[i + 2] = backgroundColor[2];
            bytes[i + 3] = 255;
          }
        }
  
        for (i = 0; i < figures.length; i++) {
          drawFigure(data, figures[i], context);
        }
  
        tmpCtx.putImageData(data, BORDER_SIZE, BORDER_SIZE);
        canvas = tmpCanvas.canvas;
      }
  
      return {
        canvas: canvas,
        offsetX: offsetX - BORDER_SIZE * scaleX,
        offsetY: offsetY - BORDER_SIZE * scaleY,
        scaleX: scaleX,
        scaleY: scaleY
      };
    }
  
    return createMeshCanvas;
  }();
  
  ShadingIRs.Mesh = {
    fromIR: function Mesh_fromIR(raw) {
      var coords = raw[2];
      var colors = raw[3];
      var figures = raw[4];
      var bounds = raw[5];
      var matrix = raw[6];
      var bbox = raw[7];
      var background = raw[8];
      return {
        getPattern: function Mesh_getPattern(ctx, owner, shadingFill) {
          applyBoundingBox(ctx, bbox);
          var scale;
  
          if (shadingFill) {
            scale = _util_metapdf.Util.singularValueDecompose2dScale(ctx.mozCurrentTransform);
          } else {
            scale = _util_metapdf.Util.singularValueDecompose2dScale(owner.baseTransform);
  
            if (matrix) {
              var matrixScale = _util_metapdf.Util.singularValueDecompose2dScale(matrix);
  
              scale = [scale[0] * matrixScale[0], scale[1] * matrixScale[1]];
            }
          }
  
          var temporaryPatternCanvas = createMeshCanvas(bounds, scale, coords, colors, figures, shadingFill ? null : background, owner.cachedCanvases, owner.webGLContext);
  
          if (!shadingFill) {
            ctx.setTransform.apply(ctx, owner.baseTransform);
  
            if (matrix) {
              ctx.transform.apply(ctx, matrix);
            }
          }
  
          ctx.translate(temporaryPatternCanvas.offsetX, temporaryPatternCanvas.offsetY);
          ctx.scale(temporaryPatternCanvas.scaleX, temporaryPatternCanvas.scaleY);
          return ctx.createPattern(temporaryPatternCanvas.canvas, "no-repeat");
        }
      };
    }
  };
  ShadingIRs.Dummy = {
    fromIR: function Dummy_fromIR() {
      return {
        getPattern: function Dummy_fromIR_getPattern() {
          return "hotpink";
        }
      };
    }
  };
  
  function getShadingPatternFromIR(raw) {
    var shadingIR = ShadingIRs[raw[0]];
  
    if (!shadingIR) {
      throw new Error("Unknown IR type: ".concat(raw[0]));
    }
  
    return shadingIR.fromIR(raw);
  }
  
  var TilingPattern = function TilingPatternClosure() {
    var PaintType = {
      COLORED: 1,
      UNCOLORED: 2
    };
    var MAX_PATTERN_SIZE = 3000;
  
    function TilingPattern(IR, color, ctx, canvasGraphicsFactory, baseTransform) {
      this.operatorList = IR[2];
      this.matrix = IR[3] || [1, 0, 0, 1, 0, 0];
      this.bbox = IR[4];
      this.xstep = IR[5];
      this.ystep = IR[6];
      this.paintType = IR[7];
      this.tilingType = IR[8];
      this.color = color;
      this.canvasGraphicsFactory = canvasGraphicsFactory;
      this.baseTransform = baseTransform;
      this.ctx = ctx;
    }
  
    TilingPattern.prototype = {
      createPatternCanvas: function TilinPattern_createPatternCanvas(owner) {
        var operatorList = this.operatorList;
        var bbox = this.bbox;
        var xstep = this.xstep;
        var ystep = this.ystep;
        var paintType = this.paintType;
        var tilingType = this.tilingType;
        var color = this.color;
        var canvasGraphicsFactory = this.canvasGraphicsFactory;
        (0, _util_metapdf.info)("TilingType: " + tilingType);
        var x0 = bbox[0],
            y0 = bbox[1],
            x1 = bbox[2],
            y1 = bbox[3];
  
        var matrixScale = _util_metapdf.Util.singularValueDecompose2dScale(this.matrix);
  
        var curMatrixScale = _util_metapdf.Util.singularValueDecompose2dScale(this.baseTransform);
  
        var combinedScale = [matrixScale[0] * curMatrixScale[0], matrixScale[1] * curMatrixScale[1]];
        var dimx = this.getSizeAndScale(xstep, this.ctx.canvas.width, combinedScale[0]);
        var dimy = this.getSizeAndScale(ystep, this.ctx.canvas.height, combinedScale[1]);
        var tmpCanvas = owner.cachedCanvases.getCanvas("pattern", dimx.size, dimy.size, true);
        var tmpCtx = tmpCanvas.context;
        var graphics = canvasGraphicsFactory.createCanvasGraphics(tmpCtx);
        graphics.groupLevel = owner.groupLevel;
        this.setFillAndStrokeStyleToContext(graphics, paintType, color);
        graphics.transform(dimx.scale, 0, 0, dimy.scale, 0, 0);
        graphics.transform(1, 0, 0, 1, -x0, -y0);
        this.clipBbox(graphics, bbox, x0, y0, x1, y1);
        graphics.executeOperatorList(operatorList);
        this.ctx.transform(1, 0, 0, 1, x0, y0);
        this.ctx.scale(1 / dimx.scale, 1 / dimy.scale);
        return tmpCanvas.canvas;
      },
      getSizeAndScale: function TilingPattern_getSizeAndScale(step, realOutputSize, scale) {
        step = Math.abs(step);
        var maxSize = Math.max(MAX_PATTERN_SIZE, realOutputSize);
        var size = Math.ceil(step * scale);
  
        if (size >= maxSize) {
          size = maxSize;
        } else {
          scale = size / step;
        }
  
        return {
          scale: scale,
          size: size
        };
      },
      clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) {
        if (Array.isArray(bbox) && bbox.length === 4) {
          var bboxWidth = x1 - x0;
          var bboxHeight = y1 - y0;
          graphics.ctx.rect(x0, y0, bboxWidth, bboxHeight);
          graphics.clip();
          graphics.endPath();
        }
      },
      setFillAndStrokeStyleToContext: function setFillAndStrokeStyleToContext(graphics, paintType, color) {
        var context = graphics.ctx,
            current = graphics.current;
  
        switch (paintType) {
          case PaintType.COLORED:
            var ctx = this.ctx;
            context.fillStyle = ctx.fillStyle;
            context.strokeStyle = ctx.strokeStyle;
            current.fillColor = ctx.fillStyle;
            current.strokeColor = ctx.strokeStyle;
            break;
  
          case PaintType.UNCOLORED:
            var cssColor = _util_metapdf.Util.makeHexColor(color[0], color[1], color[2]);
  
            context.fillStyle = cssColor;
            context.strokeStyle = cssColor;
            current.fillColor = cssColor;
            current.strokeColor = cssColor;
            break;
  
          default:
            throw new _util_metapdf.FormatError("Unsupported paint type: ".concat(paintType));
        }
      },
      getPattern: function TilingPattern_getPattern(ctx, owner) {
        ctx = this.ctx;
        ctx.setTransform.apply(ctx, this.baseTransform);
        ctx.transform.apply(ctx, this.matrix);
        var temporaryPatternCanvas = this.createPatternCanvas(owner);
        return ctx.createPattern(temporaryPatternCanvas, "repeat");
      }
    };
    return TilingPattern;
  }();
  
  exports.TilingPattern = TilingPattern;