Attach (recommended) or Link to PDF file here:
[PATTYP2.pdf](https://github.com/mozilla/pdf.js/files/6471935/PATTYP2.pdf)

Configuration:
- Web browser and its version: FF 88.0.1
- Operating system and its version: W10.0.19042.985
- PDF.js version: https://mozilla.github.io/pdf.js/web/viewer.html

Steps to reproduce the problem:
1. open file to display

What is the expected behavior? (add screenshot)
![grafik](https://user-images.githubusercontent.com/6665575/118114800-5e407800-b3e8-11eb-860f-019f48a8eabf.png)

What went wrong? (add screenshot)
![grafik](https://user-images.githubusercontent.com/6665575/118114841-6c8e9400-b3e8-11eb-8252-1517e5d76475.png)

(memo for me: when fixed, check the files in https://issues.apache.org/jira/browse/PDFBOX-1958 )

if (typeof DOMMatrix !== "undefined") {
    return new DOMMatrix(matrix);
  }
  if (!svgElement) {
    const svgFactory = new DOMSVGFactory();
    svgElement = svgFactory.createElement("svg");
  }
  return svgElement.createSVGMatrix(matrix);
}
function applyBoundingBox(ctx, bbox) {
  if (!bbox || typeof Path2D === "undefined") {
    return;
  }
  const width = bbox[2] - bbox[0];
  const height = bbox[3] - bbox[1];
  const region = new Path2D();
  region.rect(bbox[0], bbox[1], width, height);
  ctx.clip(region);
}
class BaseShadingPattern {
  constructor() {
    if (this.constructor === BaseShadingPattern) {
      unreachable("Cannot initialize BaseShadingPattern.");
    }
  }
  getPattern() {
    unreachable("Abstract method `getPattern` called.");
  }
}
class RadialAxialShadingPattern extends BaseShadingPattern {