I checked the documentation for DrvSetPixelFormat on the Microsoft website. It mentioned that this call should only be made once and calling it multiple times can cause problems with the window manager and the multithreaded applications. I would think that this function has already been called earlier in the program when I actually specify my pixel format while initializing OpenGL with calls to the ChoosePixelFormat and SetPixelFormat API's.
After this initialization, I then try to create a texture, and that is where the problem is occuring. I'm not sure why this DrvSetPixelFormat is being called while making the texture. It seems that this method might be called when it shouldn't be, and that could be related to the problem.
[EMAIL PROTECTED] wrote:
Unless someone here has the same video card, driver (+version), and
can reproduce your problem, I'm not sure you'll get much response here beyond the advice already given. Certainly it is possible that
there is a video driver issue and that would certainly be specific to
the card in question. But it's also possible that your program is causing a problem for the video driver. It's also possible that there's
a bug elsewhere (i.e. gcc) which is contributing to this failure. But
the answer to where the problem actually lies will come from some analysis.
Then again, there might be someone here on the list that has seen exactly
this problem and will pipe up with a solution. It's my impression that if
that was the case, you would've heard from that person already. So I'm
recommending you don't hold your breath waiting for that nice, simple solution to come your way. ;-)
Larry
Original Message: ----------------- From: Tron Thomas [EMAIL PROTECTED] Date: Sun, 23 Mar 2003 16:31:07 -0800 To: [EMAIL PROTECTED] Subject: Sementation fault in OpenGL application
Earlier I had posted a message concerning I segmentation fault I get when I build an OpenGL application using the GCC compiler on Cygwin. I have since discovered that the debugger spits out some information when the segmentation fault occurs. The is what it says:
Program received signal SIGSEGV, Segmentation fault. 0x6966190c in nvoglnt!DrvSetPixelFormat ()
I have a 64 Megabyte nVidia GeForce 3 video card on my system. The debug message implies the error is occuring in the video driver. I do not know what would be causing this, especially when the program runs fine when built with other compilers.
Can anyone offer any help on this matter?
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