Re: Any way to get AGL_FULLSCREEN to work on a tiBook 800?

• Subject: Re: Any way to get AGL_FULLSCREEN to work on a tiBook 800?
• From: Alexander Repenning <email@hidden>
• Date: Sat, 7 Dec 2002 12:59:43 -0700

Hmmm, the simple answer would be that AGL_FULLSREEN is spelled wrong. Assuming that is a typing issue and not one in the code... This pixel format/code works on my 800Mhz PB:

(you could be trying to does full screen without specify the display)

AGLContext SetupAGLFullScreen (GDHandle display, short * pDepth, short * pWidth, short * pHeight)
{
GLint attrib[64];
AGLPixelFormat fmt;
AGLContext ctx;

short i = 0;
attrib [i++] = AGL_RGBA; // red green blue and alpha
attrib [i++] = AGL_DOUBLEBUFFER; // double buffered
attrib [i++] = AGL_FULLSCREEN;
attrib [i++] = AGL_PIXEL_SIZE;
attrib [i++] = *pDepth;
attrib [i++] = AGL_DEPTH_SIZE;
attrib [i++] = 32;
attrib [i++] = AGL_NONE;

fmt = aglChoosePixelFormat(&display, 1, attrib); // this may fail if looking for accelerated across multiple monitors
if (NULL == fmt) {
// optional error reporting
// ReportError("Could not find valid pixel format");
// aglDebugStr ();
return NULL;
}

ctx = aglCreateContext (fmt, NULL); // Create an AGL context
aglDestroyPixelFormat(fmt); // pixel format is no longer needed
if (NULL == ctx) {
// optional error reporting
// ReportError ("Could not create context");
// aglDebugStr ();
return NULL;
}

#ifdef kDebug
aglEnable (ctx, AGL_FS_CAPTURE_SINGLE);
#endif

if (!aglSetFullScreen (ctx, *pWidth, *pHeight, 0, 0)) {
// optional error reporting
// ReportError ("SetFullScreen failed");
// aglDebugStr ();
return NULL;
}

if (!aglSetCurrentContext (ctx)) { // make the context the current context
// optional error reporting
// ReportError ("SetCurrentContext failed");
// aglDebugStr ();
aglSetDrawable (ctx, NULL); // turn off full screen
return NULL;
}

return ctx;
}

OS X (10.1.5 and 10.2.2):

Some full screen code that works happily on a 400 Mhz G4 tower with AGP 2x Mac Edition Radeon (a 3rd party board) refuses to work on a 800 Mhz G4 tiBook (mobility radeon).

after:

fmt = aglChoosePixelFormat(NULL, 0, attrib);

where attrib =
{AGL_RGBA,
AGL_DOUBLEBUFER,
AGL_FULLSREEN,
AGL_DEPTH_SIZE, 32,
AGL_NONE}

I get and AGL error: AGL Error 10006: invalid display pixel format

I tried some of the obvious things such as different versions of OS X, screen depths, sizes, ...

I am trying to follow the AGL_FULLSCREEN discussion. Seems that things are pretty complex here. Is there anything specific about 800 Mhz tiBooks? If so, are there any workarounds for Carbon programming without the need for sprockets etc? I am really puzzled by the fact that full screen worked right away of a 3rd party video board but not on off the shelve machine.

any pointers appreciated

--
Geoff Stahl
OpenGL Engineer
Apple

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