TOpenGlControl
lazarus / 1-Linux

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gtom · 2010-01-08 13:17

Hello, need some Help to get OpenGl working..
i started a lazarus project some weeks ago and got it working but i
still have lots of problems with TOpenGlControl...
On some (not all) Computers i got XErrors (Badmatch) if i compile with
gtk2.
The same code runs perfect with gtk (on all Computers) but fails
running with gtk2.
To test the behaivour i installed Ubuntu 8.10 (need 8.10 cause im
using Realtime API) on 3 different computers,
Just one was running the program in gtk2 & gkt , one was running in
gtk and failed with an XError running on Gtk2, the third on ran on gtk
but failed with an TApplication Exception running Gtk2...
When i removed the OpenGlControl all 3 Computers run on Gtk & Gtk2
without errors...
So the error is caused by the OpenGlControl...

Some Questions:

How can i debug or trap the XErrors???

i compared the glscene part of "create_context"  to the create_context
part of TOpenGlControl...
(gtkgcontext)...

As i understand the code the OpenGlControl does not try to get a
context with different attributes...
But why does the code run on Gtk and fails on Gtk2???

regards, Thomas