110 lines
3.6 KiB
C
110 lines
3.6 KiB
C
/*
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*
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* Copyright © 2000 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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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 <stdlib.h>
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#include <X11/X.h>
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#include "scrnintstr.h"
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#include "windowstr.h"
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#include <X11/fonts/font.h>
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#include "dixfontstr.h"
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#include <X11/fonts/fontstruct.h>
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#include "mi.h"
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#include "regionstr.h"
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#include "globals.h"
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#include "gcstruct.h"
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#include "shadow.h"
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#include "fb.h"
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void
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shadowUpdatePacked(ScreenPtr pScreen, shadowBufPtr pBuf)
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{
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RegionPtr damage = DamageRegion(pBuf->pDamage);
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PixmapPtr pShadow = pBuf->pPixmap;
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int nbox = RegionNumRects(damage);
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BoxPtr pbox = RegionRects(damage);
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FbBits *shaBase, *shaLine, *sha;
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FbStride shaStride;
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int scrBase, scrLine, scr;
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int shaBpp;
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_X_UNUSED int shaXoff, shaYoff;
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int x, y, w, h, width;
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int i;
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FbBits *winBase = NULL, *win;
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CARD32 winSize;
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fbGetDrawable(&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff,
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shaYoff);
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while (nbox--) {
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x = pbox->x1 * shaBpp;
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y = pbox->y1;
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w = (pbox->x2 - pbox->x1) * shaBpp;
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h = pbox->y2 - pbox->y1;
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scrLine = (x >> FB_SHIFT);
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shaLine = shaBase + y * shaStride + (x >> FB_SHIFT);
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x &= FB_MASK;
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w = (w + x + FB_MASK) >> FB_SHIFT;
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while (h--) {
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winSize = 0;
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scrBase = 0;
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width = w;
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scr = scrLine;
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sha = shaLine;
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while (width) {
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/* how much remains in this window */
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i = scrBase + winSize - scr;
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if (i <= 0 || scr < scrBase) {
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winBase = (FbBits *) (*pBuf->window) (pScreen,
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y,
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scr * sizeof(FbBits),
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SHADOW_WINDOW_WRITE,
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&winSize,
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pBuf->closure);
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if (!winBase)
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return;
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scrBase = scr;
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winSize /= sizeof(FbBits);
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i = winSize;
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}
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win = winBase + (scr - scrBase);
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if (i > width)
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i = width;
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width -= i;
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scr += i;
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memcpy(win, sha, i * sizeof(FbBits));
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sha += i;
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}
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shaLine += shaStride;
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y++;
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}
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pbox++;
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}
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}
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