/* $Xorg: mfbbstore.c,v 1.4 2001/02/09 02:05:18 xorgcvs Exp $ */
/* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */
/*

Copyright 1987, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

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 OPEN GROUP 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 Open Group 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 Open Group.

*/

#include    "mfb.h"
#include    "X.h"
#include    "mibstore.h"
#include    "regionstr.h"
#include    "scrnintstr.h"
#include    "pixmapstr.h"
#include    "windowstr.h"

/*-
 *-----------------------------------------------------------------------
 * mfbSaveAreas --
 *	Function called by miSaveAreas to actually fetch the areas to be
 *	saved into the backing pixmap. This is very simple to do, since
 *	mfbDoBitblt is designed for this very thing. The region to save is
 *	already destination-relative and we're given the offset to the
 *	window origin, so we have only to create an array of points of the
 *	u.l. corners of the boxes in the region translated to the screen
 *	coordinate system and fetch the screen pixmap out of its devPrivate
 *	field....
 *
 * Results:
 *	None.
 *
 * Side Effects:
 *	Data are copied from the screen into the pixmap.
 *
 *-----------------------------------------------------------------------
 */
void
mfbSaveAreas(pPixmap, prgnSave, xorg, yorg, pWin)
    PixmapPtr	  	pPixmap;  	/* Backing pixmap */
    RegionPtr	  	prgnSave; 	/* Region to save (pixmap-relative) */
    int	    	  	xorg;	    	/* X origin of region */
    int	    	  	yorg;	    	/* Y origin of region */
    WindowPtr		pWin;
{
    register DDXPointPtr pPt;
    DDXPointPtr		pPtsInit;
    register BoxPtr	pBox;
    register int	numRects;
    
    numRects = REGION_NUM_RECTS(prgnSave);
    pPtsInit = (DDXPointPtr)ALLOCATE_LOCAL(numRects * sizeof(DDXPointRec));
    if (!pPtsInit)
	return;
    
    pBox = REGION_RECTS(prgnSave);
    pPt = pPtsInit;
    while (numRects--)
    {
	pPt->x = pBox->x1 + xorg;
 	pPt->y = pBox->y1 + yorg;
 	pPt++;
 	pBox++;
    }

    mfbDoBitblt((DrawablePtr)pPixmap->drawable.pScreen->devPrivate,
		(DrawablePtr)pPixmap,
		GXcopy,
		prgnSave,
		pPtsInit);

    DEALLOCATE_LOCAL(pPtsInit);
}

/*-
 *-----------------------------------------------------------------------
 * mfbRestoreAreas --
 *	Function called by miRestoreAreas to actually fetch the areas to be
 *	restored from the backing pixmap. This is very simple to do, since
 *	mfbDoBitblt is designed for this very thing. The region to restore is
 *	already destination-relative and we're given the offset to the
 *	window origin, so we have only to create an array of points of the
 *	u.l. corners of the boxes in the region translated to the pixmap
 *	coordinate system and fetch the screen pixmap out of its devPrivate
 *	field....
 *
 * Results:
 *	None.
 *
 * Side Effects:
 *	Data are copied from the pixmap into the screen.
 *
 *-----------------------------------------------------------------------
 */
void
mfbRestoreAreas(pPixmap, prgnRestore, xorg, yorg, pWin)
    PixmapPtr	  	pPixmap;  	/* Backing pixmap */
    RegionPtr	  	prgnRestore; 	/* Region to restore (screen-relative)*/
    int	    	  	xorg;	    	/* X origin of window */
    int	    	  	yorg;	    	/* Y origin of window */
    WindowPtr		pWin;
{
    register DDXPointPtr pPt;
    DDXPointPtr		pPtsInit;
    register BoxPtr	pBox;
    register int	numRects;
    
    numRects = REGION_NUM_RECTS(prgnRestore);
    pPtsInit = (DDXPointPtr)ALLOCATE_LOCAL(numRects*sizeof(DDXPointRec));
    if (!pPtsInit)
	return;
    
    pBox = REGION_RECTS(prgnRestore);
    pPt = pPtsInit;
    while (numRects--)
    {
	pPt->x = pBox->x1 - xorg;
 	pPt->y = pBox->y1 - yorg;
 	pPt++;
 	pBox++;
    }

    mfbDoBitblt((DrawablePtr)pPixmap,
		(DrawablePtr)pPixmap->drawable.pScreen->devPrivate,
		GXcopy,
		prgnRestore,
		pPtsInit);

    DEALLOCATE_LOCAL(pPtsInit);
}
