144 lines
4.2 KiB
C
144 lines
4.2 KiB
C
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/*-
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* cfbbstore.c --
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* Functions required by the backing-store implementation in MI.
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*
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* Copyright (c) 1987 by the Regents of the University of California
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*
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* Permission to use, copy, modify, and distribute this
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* software and its documentation for any purpose and without
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* fee is hereby granted, provided that the above copyright
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* notice appear in all copies. The University of California
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* makes no representations about the suitability of this
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* software for any purpose. It is provided "as is" without
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* express or implied warranty.
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*
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*
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include "cfb.h"
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#include <X11/X.h>
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#include "mibstore.h"
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#include "regionstr.h"
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#include "scrnintstr.h"
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#include "pixmapstr.h"
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#include "windowstr.h"
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/*-
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*-----------------------------------------------------------------------
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* cfbSaveAreas --
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* Function called by miSaveAreas to actually fetch the areas to be
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* saved into the backing pixmap. This is very simple to do, since
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* cfbDoBitblt is designed for this very thing. The region to save is
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* already destination-relative and we're given the offset to the
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* window origin, so we have only to create an array of points of the
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* u.l. corners of the boxes in the region translated to the screen
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* coordinate system and fetch the screen pixmap out of its devPrivate
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* field....
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*
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* Results:
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* None.
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*
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* Side Effects:
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* Data are copied from the screen into the pixmap.
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*
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*-----------------------------------------------------------------------
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*/
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void
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cfbSaveAreas(pPixmap, prgnSave, xorg, yorg, pWin)
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PixmapPtr pPixmap; /* Backing pixmap */
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RegionPtr prgnSave; /* Region to save (pixmap-relative) */
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int xorg; /* X origin of region */
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int yorg; /* Y origin of region */
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WindowPtr pWin;
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{
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register DDXPointPtr pPt;
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DDXPointPtr pPtsInit;
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register BoxPtr pBox;
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register int i;
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ScreenPtr pScreen = pPixmap->drawable.pScreen;
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PixmapPtr pScrPix;
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i = REGION_NUM_RECTS(prgnSave);
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pPtsInit = (DDXPointPtr)ALLOCATE_LOCAL(i * sizeof(DDXPointRec));
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if (!pPtsInit)
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return;
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pBox = REGION_RECTS(prgnSave);
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pPt = pPtsInit;
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while (--i >= 0) {
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pPt->x = pBox->x1 + xorg;
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pPt->y = pBox->y1 + yorg;
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pPt++;
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pBox++;
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}
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pScrPix = (*pScreen->GetWindowPixmap)(pWin);
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cfbDoBitbltCopy((DrawablePtr) pScrPix, (DrawablePtr)pPixmap,
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GXcopy, prgnSave, pPtsInit, ~0L);
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DEALLOCATE_LOCAL (pPtsInit);
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}
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/*-
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*-----------------------------------------------------------------------
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* cfbRestoreAreas --
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* Function called by miRestoreAreas to actually fetch the areas to be
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* restored from the backing pixmap. This is very simple to do, since
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* cfbDoBitblt is designed for this very thing. The region to restore is
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* already destination-relative and we're given the offset to the
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* window origin, so we have only to create an array of points of the
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* u.l. corners of the boxes in the region translated to the pixmap
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* coordinate system and fetch the screen pixmap out of its devPrivate
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* field....
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*
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* Results:
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* None.
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*
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* Side Effects:
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* Data are copied from the pixmap into the screen.
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*
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*-----------------------------------------------------------------------
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*/
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void
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cfbRestoreAreas(pPixmap, prgnRestore, xorg, yorg, pWin)
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PixmapPtr pPixmap; /* Backing pixmap */
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RegionPtr prgnRestore; /* Region to restore (screen-relative)*/
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int xorg; /* X origin of window */
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int yorg; /* Y origin of window */
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WindowPtr pWin;
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{
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register DDXPointPtr pPt;
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DDXPointPtr pPtsInit;
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register BoxPtr pBox;
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register int i;
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ScreenPtr pScreen = pPixmap->drawable.pScreen;
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PixmapPtr pScrPix;
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i = REGION_NUM_RECTS(prgnRestore);
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pPtsInit = (DDXPointPtr)ALLOCATE_LOCAL(i*sizeof(DDXPointRec));
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if (!pPtsInit)
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return;
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pBox = REGION_RECTS(prgnRestore);
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pPt = pPtsInit;
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while (--i >= 0) {
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pPt->x = pBox->x1 - xorg;
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pPt->y = pBox->y1 - yorg;
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pPt++;
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pBox++;
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}
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pScrPix = (*pScreen->GetWindowPixmap)(pWin);
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cfbDoBitbltCopy((DrawablePtr)pPixmap, (DrawablePtr) pScrPix,
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GXcopy, prgnRestore, pPtsInit, ~0L);
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DEALLOCATE_LOCAL (pPtsInit);
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}
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