[Mono-list] GDI+ and Mono 2.0.1

[Bálint Kardos]

Hi Sebastien,
I've installed a clear Ubuntu 8.04 version and have Mono 1.9 running.
Finally, it is partly working for now.

The main error was with the incomplete GDI packages on the old Fedora I was
using, as I thought so before.

Now the program is writing text to the PNG canvas, BUT with a default font,
not with the custom one I've choosed.

I think now it qualifies for a Bugzilla bugreport :)

Thanks again,

b.



üdvözlettel
with regards

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


On Wed, Feb 4, 2009 at 20:02, Sebastien Pouliot <sebastien.pouliot at gmail.com
> wrote:

> On Wed, 2009-02-04 at 19:27 +0100, Bálint Kardos wrote:
> > 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.
>
> Yep, a bit lame but this is how GDI+/SD reports such permission issues.
>
> >  It now executes, but the output file is just 192 bytes long, and only
> > has the header of the PNG stream.
>
> My previous suggestion still applies. Once you have a small EXE it will
> be much easier to debug (and/or trace) to see what's going on.
>
> > 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,
>
> TextWriter / font ? not likely ;-)
>
> > so I can't find any reason why it's not working.
>
> Try to remove step 2 (adding the text) and see if a copy of the original
> file is saved (or just an header).
>
> >
> > 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.
>
> Possible but unlikely, since you would have hit an exception (or a
> crash).
>
> >
> >
> >
> >
> > 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
> >
> >
> >
> >
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.ximian.com/pipermail/mono-list/attachments/20090213/3b16d8bc/attachment.html