ref: b76e8ecc732cb311ceee6fd6c807b7e784d3fe31
dir: /sys/src/ape/X11/cmd/X/cfb/cfbbstore.c/
/*-
* cfbbstore.c --
* Functions required by the backing-store implementation in MI.
*
* Copyright (c) 1987 by the Regents of the University of California
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*
*
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "cfb.h"
#include <X11/X.h>
#include "mibstore.h"
#include "regionstr.h"
#include "scrnintstr.h"
#include "pixmapstr.h"
#include "windowstr.h"
/*-
*-----------------------------------------------------------------------
* cfbSaveAreas --
* Function called by miSaveAreas to actually fetch the areas to be
* saved into the backing pixmap. This is very simple to do, since
* cfbDoBitblt 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
cfbSaveAreas(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 i;
ScreenPtr pScreen = pPixmap->drawable.pScreen;
PixmapPtr pScrPix;
i = REGION_NUM_RECTS(prgnSave);
pPtsInit = (DDXPointPtr)ALLOCATE_LOCAL(i * sizeof(DDXPointRec));
if (!pPtsInit)
return;
pBox = REGION_RECTS(prgnSave);
pPt = pPtsInit;
while (--i >= 0) {
pPt->x = pBox->x1 + xorg;
pPt->y = pBox->y1 + yorg;
pPt++;
pBox++;
}
pScrPix = (*pScreen->GetWindowPixmap)(pWin);
cfbDoBitbltCopy((DrawablePtr) pScrPix, (DrawablePtr)pPixmap,
GXcopy, prgnSave, pPtsInit, ~0L);
DEALLOCATE_LOCAL (pPtsInit);
}
/*-
*-----------------------------------------------------------------------
* cfbRestoreAreas --
* Function called by miRestoreAreas to actually fetch the areas to be
* restored from the backing pixmap. This is very simple to do, since
* cfbDoBitblt 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
cfbRestoreAreas(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 i;
ScreenPtr pScreen = pPixmap->drawable.pScreen;
PixmapPtr pScrPix;
i = REGION_NUM_RECTS(prgnRestore);
pPtsInit = (DDXPointPtr)ALLOCATE_LOCAL(i*sizeof(DDXPointRec));
if (!pPtsInit)
return;
pBox = REGION_RECTS(prgnRestore);
pPt = pPtsInit;
while (--i >= 0) {
pPt->x = pBox->x1 - xorg;
pPt->y = pBox->y1 - yorg;
pPt++;
pBox++;
}
pScrPix = (*pScreen->GetWindowPixmap)(pWin);
cfbDoBitbltCopy((DrawablePtr)pPixmap, (DrawablePtr) pScrPix,
GXcopy, prgnRestore, pPtsInit, ~0L);
DEALLOCATE_LOCAL (pPtsInit);
}