dri_glx.c   [plain text]

/**************************************************************************

Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
Copyright (c) 2002 Apple Computer, Inc.
All Rights Reserved.

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The above copyright notice and this permission notice (including the
next paragraph) shall be included in all copies or substantial portions
of the Software.

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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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**************************************************************************/
/* $XFree86: xc/lib/GL/dri/dri_glx.c,v 1.10 2001/08/27 17:40:57 dawes Exp $ */

/*
 * Authors:
 *   Kevin E. Martin <kevin@precisioninsight.com>
 *   Brian Paul <brian@precisioninsight.com>
 *
 */

#ifdef GLX_DIRECT_RENDERING

#include <unistd.h>
#include <Xlibint.h>
#include <extensions/Xext.h>
#include <extensions/extutil.h>
#include "glxclient.h"
#include "appledri.h"
#include <stdio.h>
#include "dri_glx.h"
#include <sys/types.h>
#include <stdarg.h>


static void driDestroyDisplay(Display *dpy, void *private)
{
    __DRIdisplayPrivate *pdpyp = (__DRIdisplayPrivate *)private;

    if (pdpyp) {
	Xfree(pdpyp->createScreen);
	Xfree(pdpyp);
    }
}


void *driCreateDisplay(Display *dpy, __DRIdisplay *pdisp)
{
    const int numScreens = ScreenCount(dpy);
    __DRIdisplayPrivate *pdpyp;
    int eventBase, errorBase;
    int major, minor, patch;

    /* Initialize these fields to NULL in case we fail.
     * If we don't do this we may later get segfaults trying to free random
     * addresses when the display is closed.
     */
    pdisp->private = NULL;
    pdisp->destroyDisplay = NULL;
    pdisp->createScreen = NULL;

    if (!XAppleDRIQueryExtension(dpy, &eventBase, &errorBase)) {
	return NULL;
    }

    if (!XAppleDRIQueryVersion(dpy, &major, &minor, &patch)) {
	return NULL;
    }

    pdpyp = (__DRIdisplayPrivate *)Xmalloc(sizeof(__DRIdisplayPrivate));
    if (!pdpyp) {
	return NULL;
    }

    pdpyp->driMajor = major;
    pdpyp->driMinor = minor;
    pdpyp->driPatch = patch;

    pdisp->destroyDisplay = driDestroyDisplay;

    /* allocate array of pointers to createScreen funcs */
    pdisp->createScreen = (CreateScreenFunc *) Xmalloc(numScreens * sizeof(void *));
    if (!pdisp->createScreen)
       return NULL;

    /* we'll statically bind to the __driCreateScreen function */
    {
       int i;
       for (i = 0; i < numScreens; i++) {
          pdisp->createScreen[i] = __driCreateScreen;
       }
    }

    return (void *)pdpyp;
}


/*
** Here we'll query the DRI driver for each screen and let each
** driver register its GL extension functions.  We only have to
** do this once.  But it MUST be done before we create any contexts
** (i.e. before any dispatch tables are created) and before
** glXGetProcAddressARB() returns.
**
** Currently called by glXGetProcAddress(), __glXInitialize(), and
** __glXNewIndirectAPI().
*/
void
__glXRegisterExtensions(void)
{
   static GLboolean alreadyCalled = GL_FALSE;

   if (alreadyCalled) {
      return;
   }

   __driRegisterExtensions ();

   alreadyCalled = GL_TRUE;
}


#endif /* GLX_DIRECT_RENDERING */