PDF.js displays blurry plots in PDF documents, e.g.

http://arxiv.org/pdf/1202.5344v1.pdf

When viewed in Chrome or Adobe Acrobat all the plots show sharp-edged squares. When viewed in Preview or PDF.js, all the squares show as blurry pixelated blobs.

this.pendingEOFill = true;
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    fillStroke() {
      this.fill(false);
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      this.consumePath();
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    eoFillStroke() {