[PDFBOX-5134] Very slow rendering on PageDrawer.shadingFill

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.22, 2.0.23
• Fix Version/s: 2.0.24, 3.0.0 PDFBox
• Component/s: Rendering
• Labels: optimization shading
• Assignee: Tilman Hausherr
• Reporter: Oliver Schmidtmer
• Created: 17/Mar/21 16:19
• Updated: 11/Jun/21 06:08
• Resolved: 02/Apr/21 10:20

Description

The PDF contains many effectively very small shadings, the light cones. As the gradient painting for each light cone is applied on the whole image, rendering is very slow: 29 of 33 seconds are spent in shadingFill.

Issue Links

• links to: GitHub Pull Request #109