[Mono-bugs] [Bug 392391] New: Inconsistent transformations

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Tue May 20 00:47:33 EDT 2008


           Summary: Inconsistent transformations
           Product: Mono: Class Libraries
           Version: unspecified
          Platform: x86-64
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Sys.Drawing.
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: jon at jondavis.net
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---

Description of Problem:

 Rendering text on a form using System.Drawing seems to be negatively affected
by 2D matrix transformations. 

Steps to reproduce the problem:

I have a mini game engine for GDI+ I wrote in .NET and "ported" to Mono on Mac
OS X 10.5. (No porting, really, just copied the code over.) It runs, but the
text that is rendered is wobbling in a different position in each frame by
about two or three pixels. I have some world rotations that I'm doing (where
the matrix transformations come in) for drop-shadows, and the app runs fine in
Windows but very shaky on the Mac.

I posted my source here:
http://www.jondavis.net/misc/Level1Engine_monomac.7z.zip (drop the ".zip" after

Actual Results:

 Wobbly renderings

Expected Results:

 Still renderings

How often does this happen? 

 Every run (of my code)

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