xserver/hw/xwin/winallpriv.c

/*
 *Copyright (C) 1994-2000 The XFree86 Project, Inc. All Rights Reserved.
 *
 *Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 *"Software"), to deal in the Software without restriction, including
 *without limitation the rights to use, copy, modify, merge, publish,
 *distribute, sublicense, and/or sell copies of the Software, and to
 *permit persons to whom the Software is furnished to do so, subject to
 *the following conditions:
 *
 *The above copyright notice and this permission notice shall be
 *included in all copies or substantial portions of the Software.
 *
 *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *NONINFRINGEMENT. IN NO EVENT SHALL THE XFREE86 PROJECT BE LIABLE FOR
 *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
 *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 *Except as contained in this notice, the name of the XFree86 Project
 *shall not be used in advertising or otherwise to promote the sale, use
 *or other dealings in this Software without prior written authorization
 *from the XFree86 Project.
 *
 * Authors:	Keith Packard, MIT X Consortium
 *		Harold L Hunt II
 */

#ifdef HAVE_XWIN_CONFIG_H
#include <xwin-config.h>
#endif
#include "win.h"


/* See Porting Layer Definition - p. 58 */
/*
 * Allocate indexes for the privates that we use.
 * Allocate memory directly for the screen privates.
 * Reserve space in GCs and Pixmaps for our privates.
 * Colormap privates are handled in winAllocateCmapPrivates ()
 */

Bool
winAllocatePrivates (ScreenPtr pScreen)
{
  winPrivScreenPtr	pScreenPriv;

#if CYGDEBUG
  winDebug ("winAllocateScreenPrivates - g_ulServerGeneration: %d "
	  "serverGeneration: %d\n",
	  g_ulServerGeneration, serverGeneration);
#endif

  /* We need a new slot for our privates if the screen gen has changed */
  if (g_ulServerGeneration != serverGeneration)
    {
      g_ulServerGeneration = serverGeneration;
    }

  /* Allocate memory for the screen private structure */
  pScreenPriv = (winPrivScreenPtr) malloc (sizeof (winPrivScreenRec));
  if (!pScreenPriv)
    {
      ErrorF ("winAllocateScreenPrivates - malloc () failed\n");
      return FALSE;
    }

  /* Initialize the memory of the private structure */
  ZeroMemory (pScreenPriv, sizeof (winPrivScreenRec));

  /* Intialize private structure members */
  pScreenPriv->fActive = TRUE;

  /* Save the screen private pointer */
  winSetScreenPriv (pScreen, pScreenPriv);

  /* Reserve GC memory for our privates */
  if (!dixRequestPrivate(g_iGCPrivateKey, sizeof (winPrivGCRec)))
    {
      ErrorF ("winAllocatePrivates - AllocateGCPrivate () failed\n");
      return FALSE;
    }

  /* Reserve Pixmap memory for our privates */
  if (!dixRequestPrivate(g_iPixmapPrivateKey, sizeof (winPrivPixmapRec)))
    {
      ErrorF ("winAllocatePrivates - AllocatePixmapPrivates () failed\n");
      return FALSE;
    }

  /* Reserve Window memory for our privates */
  if (!dixRequestPrivate(g_iWindowPrivateKey, sizeof (winPrivWinRec)))
    {
      ErrorF ("winAllocatePrivates () - AllocateWindowPrivates () failed\n");
       return FALSE;
     }

  return TRUE;
}


/*
 * Colormap privates may be allocated after the default colormap has
 * already been created for some screens.  This initialization procedure
 * is called for each default colormap that is found.
 */

Bool
winInitCmapPrivates (ColormapPtr pcmap, int index)
{
#if CYGDEBUG
  winDebug ("winInitCmapPrivates\n");
#endif
  
  /*
   * I see no way that this function can do anything useful
   * with only a ColormapPtr.  We don't have the index for
   * our dev privates yet, so we can't really initialize
   * anything.  Perhaps I am misunderstanding the purpose
   * of this function.
   */
  /*  That's definitely true.
   *  I therefore changed the API and added the index as argument.
   */
  return TRUE;
}


/*
 * Allocate memory for our colormap privates
 */

Bool
winAllocateCmapPrivates (ColormapPtr pCmap)
{
  winPrivCmapPtr		pCmapPriv;
  static unsigned long		s_ulPrivateGeneration = 0;

#if CYGDEBUG
  winDebug ("winAllocateCmapPrivates\n");
#endif

  /* Get a new privates index when the server generation changes */
  if (s_ulPrivateGeneration != serverGeneration)
    {
      /* Save the new server generation */
      s_ulPrivateGeneration = serverGeneration;
    }

  /* Allocate memory for our private structure */
  pCmapPriv = (winPrivCmapPtr) malloc (sizeof (winPrivCmapRec));
  if (!pCmapPriv)
    {
      ErrorF ("winAllocateCmapPrivates - malloc () failed\n");
      return FALSE;
    }

  /* Initialize the memory of the private structure */
  ZeroMemory (pCmapPriv, sizeof (winPrivCmapRec));

  /* Save the cmap private pointer */
  winSetCmapPriv (pCmap, pCmapPriv);

#if CYGDEBUG
  winDebug ("winAllocateCmapPrivates - Returning\n");
#endif

  return TRUE;
}