[Mono-list] GDI+ and Mono 2.0.1

[Bálint Kardos]

Hi Sebastien,
thanks for your reply!
I only want to deploy it on the Linux server, so I'm working on this part
first.

I found the solution, it had no rights to write to a given folder. It now
executes, but the output file is just 192 bytes long, and only has the
header of the PNG stream.

The whole process is the following:

1)  open a 24bit PNG file
2)  add the text
3)  save the file to a given directory
4)  send it to the out stream

Image.FromFile would throw an exception if it would not find the original
file,
the TextWriter would throw an exception if it would not find the font,
so I can't find any reason why it's not working.

I don't know, possibly I'm missing some required .so files?
I installed everything from the mono packages, and have libpng installed as
well.



üdvözlettel
with regards

Kardos Bálint
_______________________________________
http://skaelede.hu 10 (0xA) év a magyar weben


On Wed, Feb 4, 2009 at 19:12, Sebastien Pouliot <sebastien.pouliot at gmail.com
> wrote:

> On Wed, 2009-02-04 at 18:55 +0100, Bálint Kardos wrote:
> > Hi,
> >
> >
> > I have written a small HttpHandler which automatically generates text
> > on the fly with a custom font, added to the
> > System.Drawing.Font.PrivateFontCollection.
> >
> >
> > with Ms.net 3.5sp1, it works fine.
> >
> >
> > with Mono 2.0.1,
> > on Vista, it dies with:
> >
> >
> > Stacktrace:
> >
> >
> >   at (wrapper managed-to-native)
> > System.Drawing.GDIPlus.GdipDeletePrivateFontCollection (intptr&)
> > <0x00004>
> >   at (wrapper managed-to-native)
> > System.Drawing.GDIPlus.GdipDeletePrivateFontCollection (intptr&)
> > <0xffffffff>
> >   at System.Drawing.Text.PrivateFontCollection.Dispose (bool)
> > [0x00015] in C:\cygwin\tmp\monobuild\build\BUILD\mono-2.0.1\mcs\class
> > \System.Drawing\System.Drawing.Text\PrivateFontCollection.cs:80
> >
> >
> >
> >
> > on Linux, it dies with:
> >
> >
> > System.Exception: Generic Error [GDI+ status: GenericError]
> >   at System.Drawing.GDIPlus.CheckStatus (Status status) [0x00000]
> >   at System.Drawing.Image.Save (System.String filename,
> System.Drawing.Imaging.ImageCodecInfo encoder,
> System.Drawing.Imaging.EncoderParameters encoderParams) [0x00000]
> >   at System.Drawing.Image.Save (System.String filename,
> System.Drawing.Imaging.ImageFormat format) [0x00000]
> >
> > none of the which are further traceable.
>
> This is likely two different issues. I recall (it was a _long_ time
> ago) some win32 specific behavior wrt PrivateFontCollection -
> explaining the first case.
>
> I suspect the later error (on Linux) is due to something else.
>
> > Any clues on how to further debug?
> > thank you,
>
> Try to create a test case outside your HTTP handler (i.e. a small EXE).
> Then use "mono --debug app.exe" to get a bit more information and fill a
> bug report on http://bugzilla.novell.com
>
> Thanks,
> Sebastien
>
>
>
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