[PDFBOX-2450] RenderingHints of PageDrawer should be customizable

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Not A Problem
• Affects Version/s: 2.0.0
• Component/s: Rendering
• Labels: PageDrawer RenderingHints,
• Assignee: Unassigned
• Reporter: Pei-Tang Huang
• Created: 24/Oct/14 06:33
• Updated: 19/Jan/19 11:41
• Resolved: 17/Nov/14 19:11

Description

RenderingHints defaults are hard-coded in PageDrawer now.

However, the defaults are not always valid for every situation. For example, I have a PDF file containing barcodes, which will be printed out using a low resolution dot matrix printer. The RenderingHints.VALUE_ANTIALIAS_ON default confuses all of our barcode reader!

A dirty workaround I had is to extend PDFPrinter, use reflection to set the protected but final super.renderer field with following extension:

@Override
public void renderPageToGraphics(int pageIndex, Graphics2D graphics, float scale) throws IOException {
    // proxy graphics, applying hints immediately, suppress all subsequent setRenderingHint request
    Graphics2D hintsAppliedGraphics = new HintsAppliedGraphics2D(graphics, hints);

    super.renderPageToGraphics(pageIndex, hintsAppliedGraphics, scale);
}

It will be nice if there exist a more elegant way to specify RenderHint s.

Issue Links

• is related to: PDFBOX-4435 Poor quality printing of PDF label