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 )

} else {
      
      scale = Util.singularValueDecompose2dScale(owner.baseTransform);
      if (this._matrix) {
        const matrixScale = Util.singularValueDecompose2dScale(this._matrix);
        scale = [scale[0] * matrixScale[0], scale[1] * matrixScale[1]];
      }
    }
    
    
    const temporaryPatternCanvas = this._createMeshCanvas(
      scale,
      shadingFill ? null : this._background,
      owner.cachedCanvases
    );
    if (!shadingFill) {
      ctx.setTransform.apply(ctx, owner.baseTransform);
      if (this._matrix) {
        ctx.transform.apply(ctx, this._matrix);
      }
    }
    ctx.translate(
      temporaryPatternCanvas.offsetX,
      temporaryPatternCanvas.offsetY
    );
    ctx.scale(temporaryPatternCanvas.scaleX, temporaryPatternCanvas.scaleY);
    return ctx.createPattern(temporaryPatternCanvas.canvas, "no-repeat");
  }
}
class DummyShadingPattern extends BaseShadingPattern {