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NovaCaine · Joined: 20 Dec 2005 Posts: 34 Location: New Zealand

Ok, I got another problem.

Im trying to get PSPGL to run under SDL, so that I have SDL for timer, joystick etc and PSPGL for rendering.

After searching the forums I found a code snippet that seemed to do this except when I finally got it to compile it crashes my PSP in setting up the Viewport(?). The thread link is here. the post is near the bottom of the page by mrbrown.

Here's the code

jsgf · Joined: 12 Jul 2005 Posts: 254

I haven't used PSPGL with SDL, but it looks like the GL context hasn't been made current; either the context hasn't been created, or eglMakeCurrent() hasn't been called on it.

Was SDL compiled with HAVE_OPENGL defined?

NovaCaine · Joined: 20 Dec 2005 Posts: 34 Location: New Zealand

No, like I said, this was a copy-and-paste from the thread i'd posted.

That is all the code that I'm compiling there, how do I compile with HAVE_OPENGL? is it just a #define?

Will try eglMakeCurrent(), hopefully this will fix it :P
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jsgf · Joined: 12 Jul 2005 Posts: 254

No, SDL should be doing it for you. HAVE_OPENGL is a build-time config setting for SDL which makes it support OpenGL or not. Hm, it seems to be set OK when I build SDL here...

NovaCaine · Joined: 20 Dec 2005 Posts: 34 Location: New Zealand

Oh, You mean in the SetVideoMode function? Yes I have got the flag set.

Did you manage to get the code to compile and run? I could compile the code fine, but when I run it on my PSP (v1.5 btw) it crashes and points to the glViewport.c file. I know theres nothing wrong with my PSPGL build, as I can build and run the demos fine - its only this lot of code that I'm having trouble with. And same with SDL...
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jsgf · Joined: 12 Jul 2005 Posts: 254

No, when you built SDL, was it built with -DHAVE_OPENGL on the compiler command line.

I can't see any problem with your code or with SDL, assuming SDL has PSPGL support in it.

I'll try running the code later today.

NovaCaine · Joined: 20 Dec 2005 Posts: 34 Location: New Zealand

Sorry bout this noob question, but I'm still trying to get my head around the whole linux programming setup.

When you say "built SDL" Im guessing you mean when I biult the lib from svn. Then the answer is no - i did exactly how the README stated. Where do I call it? (LDFLAGS? CFLAGS? Doesn't help that the only linux guru I know doesn't program much...)

This may be the problem then and I'll try rebuilding SDL.
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PacManFan · Joined: 25 Jun 2005 Posts: 66

I've been trying to port some games that use both OpenGL and SDL together, and I'm having the same problems. -DHAVE_OPENGL was defined as one of the CFlags in the SDL makefile. GL seems to be crashing when I set up the viewport.

Both GL applications and SDL applications seem to work fine separately.

Any ideas?

-PMF
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"I'm a little source code, short and stout
Here is my input, here is my out."

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PacManFan · Joined: 25 Jun 2005 Posts: 66

from my BSOD screen, the psp-addr2line tells me it's this:

struct pspvfpu_context *pspvfpu_initcontext(void)
{
struct pspvfpu_context *c;

/* Make sure the kernel preserves this thread's VFPU state */
if (sceKernelChangeCurrentThreadAttr(0, PSP_THREAD_ATTR_VFPU) < 0)
return NULL;

c = memalign(VFPU_ALIGNMENT, sizeof(*c));

if (c != NULL) {
c->owned = 0;
c->valid = 0;
}

return c;
}

somehow, it's the call to sceKernelChangeCurrentThreadAttr that's causing the crash.

-PMF
_________________
"I'm a little source code, short and stout
Here is my input, here is my out."

Author of PSPQuake and PSPSOne.

NovaCaine · Joined: 20 Dec 2005 Posts: 34 Location: New Zealand

Cool, got it working now, maybe it should be written in the readme file to add -DHAVE_OPENGL for openGL support.

Thanks for the help PacManFan and jsgf!
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jsgf · Joined: 12 Jul 2005 Posts: 254

jsgf · Joined: 12 Jul 2005 Posts: 254

PacManFan · Joined: 25 Jun 2005 Posts: 66

How did you get it working?
my SDL makefile already had the -DHAVE_OPENGL define flag set, and it's still crashing.

-PMF
_________________
"I'm a little source code, short and stout
Here is my input, here is my out."

Author of PSPQuake and PSPSOne.

NovaCaine · Joined: 20 Dec 2005 Posts: 34 Location: New Zealand

Try compiling my code above - it should give a 3d triangle rotating.

All I did was rebuild my main SDL with the -DHAVE_OPENGL in the CFLAGS of the makefile (it may have been an older one, but I did try an update).

The error I got when it crashed was on line 9 of glViewport.c, which had something to do with setting the x value of the viewport IIRC.

Otherwise like I said, the code in my first post is what I am compiling, the only other change was that I also have -DHAVE_OPENGL in my projects cflags as well - if that does anything (i'm not sure)