[PDFBOX-2156] different shading patterns at different resolutions when ctm is null

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.5, 1.8.6, 1.8.7, 2.0.0
• Fix Version/s: 1.8.7, 2.0.0
• Component/s: Rendering
• Labels: shading shadingpattern
• Assignee: Tilman Hausherr
• Reporter: Tilman Hausherr
• Created: 21/Jun/14 17:35
• Updated: 19/Sep/14 14:40
• Resolved: 22/Jun/14 16:27

Description

The attached file renders incorrectly except at 72dpi; at other resolutions, there are different results that get worse as the resolution gets higher. For shading types 2 and 3, this effect happens only in the 1.8 versions, not in the 2.0 version. For shading types 4 and up, it happens in both 1.8 and 2.0.

The reason is that the transformation is incomplete if the ctm is null.

I found the file here and it was created by Matthias Kramm:
https://github.com/jdapena/swftools/tree/master/spec