/* Copyright 1997 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 *

 * 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, and/or sell copies of the Software, and to permit persons

 * to whom the Software is furnished to do so, provided that the above

 * copyright notice(s) and this permission notice appear in all copies of

 * the Software and that both the above copyright notice(s) and this

 * permission notice appear in supporting documentation.

 *

 * 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

 * OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR

 * HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL

 * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING

 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,

 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION

 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 *

 * Except as contained in this notice, the name of a copyright holder

 * shall not be used in advertising or otherwise to promote the sale, use

 * or other dealings in this Software without prior written authorization

 * of the copyright holder.

 */

/* 

** mbufset.c - Routines to manipulate multibuffer set objects.

*/

#include <malloc.h>

#ifdef SERVER_DGA

#include <X11/Xlib.h>

#endif /* SERVER_DGA */

#include "dga_incls.h"

#include "pix_grab.h"

#include "mbufsetstr.h"

static void dgai_mbufset_destroy (DgaMbufSetPtr pMbs);

extern int dga_pixlist_add(Dga_token token, Display *dpy, Pixmap pix);

/*

** Create a client-side multibuffer set object based on information

** in the shinfo of a window.  The window must be locked prior to calling.

*/

DgaMbufSetPtr

dgai_mbufset_create (_Dga_window dgawin)

{

    DgaMbufSetPtr 	pMbs;

    WXINFO		*infop;

    DgaMbufSetShinfoPtr	pMbsInfo;

    short		numBufs, i;

    unsigned long	bufViewableFlags, bufMask;

    Dga_token		token;

    _Dga_pixmap		dgapix;

    XID			*pShinfoId;

    infop = (WXINFO *) dgawin->w_info;

    pMbsInfo = &infop->w_mbsInfo;    

    token = (Dga_token) pMbsInfo->nmbufShpxToken;

    pShinfoId = &(pMbsInfo->nmbufIds[0]);

    /* allocate mbufset client structure */

    if (!(pMbs = (DgaMbufSetPtr) malloc(sizeof(DgaMbufSet)))) {

	return (NULL);

    }

    numBufs = infop->wx_dbuf.number_buffers;

    pMbs->numBufs = numBufs;

    for (i = 0; i < numBufs;  i++) {

	pMbs->pNbPixmaps[i] = NULL;

    }

    bufViewableFlags = pMbsInfo->bufViewableFlags;

    bufMask = 1L;

    for (i = 0; i < numBufs;  i++, pShinfoId++) {

	if (!(bufViewableFlags & bufMask)) {

	    if (!dga_pixlist_add(token, dgawin->w_dpy, (Pixmap)*pShinfoId) ||

	        !(dgapix = dga_pix_grab(token, (Pixmap)*pShinfoId))) {

		goto Bad;

	    }

	    pMbs->pNbPixmaps[i] = dgapix;

	    pMbs->pNbShinfo[i] = (SHARED_PIXMAP_INFO *)dgapix->p_infop;

	} else {

	    pMbs->pNbShinfo[i] = NULL;

	}

	pMbs->mbufseq[i] = 0;

	pMbs->clipseq[i] = 0;

	pMbs->curseq[i] = 0;

	pMbs->cacheSeqs[i] = 0;

	pMbs->devInfoSeqs[i] = 0;

	pMbs->prevLocked[i] = 0;

	bufMask = bufMask << 1;

    }

    /* success */

    pMbs->refcnt = 1;

    return (pMbs);

Bad:

    dgai_mbufset_destroy(pMbs);

    return (NULL);

}

void

dgai_mbufset_incref (DgaMbufSetPtr pMbs)

{

    pMbs->refcnt++;

}

static void

dgai_mbufset_destroy (DgaMbufSetPtr pMbs)

{

    short i;

    for (i = 0; i < pMbs->numBufs;  i++) {

	if (pMbs->pNbPixmaps[i]) {

	    dga_pix_ungrab(pMbs->pNbPixmaps[i]);

	}

    }

    free(pMbs);

}

void

dgai_mbufset_decref (DgaMbufSetPtr pMbs)

{

    if ((int)(--(pMbs->refcnt)) <= 0) {

	dgai_mbufset_destroy(pMbs);

    }

}