[XGC-41] [PATCH] Incorrect AffineTransform in PSGenerator state due to AbstractPSDocumentGraphics2D.startPage method

• Type: Bug
• Status: Resolved
• Resolution: Fixed
• Affects Version/s: 2.6
• Component/s: postscript
• Labels: PatchAvailable
• Environment: Operating System: All; Platform: All
• Assignee: XML Graphics Project Mailing List
• Reporter: Julien Aymé
• Created: 25/May/10 09:37
• Updated: 24/Jun/15 08:50
• Resolved: 13/Jun/10 11:48

Description

Hi all,

I extended PSDocumentGraphics2D to generate a more optimized PS code, and I noticed that the PSGenerator always wrote the same transformation matrix again and again.

After some search, I found that the startPage method in AbstractPSDocumentGraphics2D uses the concatMatrix method of PSGenerator, which alters the PSGenerator current state to save the given AffineTransform.

I've attached a simple TestCase which shows the problem (fails with current trunk code), and I will attach a simple patch:
Use gen.writeln(gen.formatMatrix(at) + "concat") instead of gen.concatMatrix(at);