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/*
*
* Copyright © 2000 Keith Packard
*
* 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, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR 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.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <stdlib.h>
#include <X11/X.h>
#include "scrnintstr.h"
#include "windowstr.h"
#include <X11/fonts/font.h>
#include "dixfontstr.h"
#include <X11/fonts/fontstruct.h>
#include "mi.h"
#include "regionstr.h"
#include "globals.h"
#include "gcstruct.h"
#include "shadow.h"
#include "fb.h"
void
shadowUpdatePacked(ScreenPtr pScreen, shadowBufPtr pBuf)
{
RegionPtr damage = DamageRegion(pBuf->pDamage);
PixmapPtr pShadow = pBuf->pPixmap;
int nbox = RegionNumRects(damage);
BoxPtr pbox = RegionRects(damage);
FbBits *shaBase, *shaLine, *sha;
FbStride shaStride;
int scrBase, scrLine, scr;
int shaBpp;
_X_UNUSED int shaXoff, shaYoff;
int x, y, w, h, width;
int i;
FbBits *winBase = NULL, *win;
CARD32 winSize;
fbGetDrawable(&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff,
shaYoff);
while (nbox--) {
x = pbox->x1 * shaBpp;
y = pbox->y1;
w = (pbox->x2 - pbox->x1) * shaBpp;
h = pbox->y2 - pbox->y1;
scrLine = (x >> FB_SHIFT);
shaLine = shaBase + y * shaStride + (x >> FB_SHIFT);
x &= FB_MASK;
w = (w + x + FB_MASK) >> FB_SHIFT;
while (h--) {
winSize = 0;
scrBase = 0;
width = w;
scr = scrLine;
sha = shaLine;
while (width) {
/* how much remains in this window */
i = scrBase + winSize - scr;
if (i <= 0 || scr < scrBase) {
winBase = (FbBits *) (*pBuf->window) (pScreen,
y,
scr * sizeof(FbBits),
SHADOW_WINDOW_WRITE,
&winSize,
pBuf->closure);
if (!winBase)
return;
scrBase = scr;
winSize /= sizeof(FbBits);
i = winSize;
}
win = winBase + (scr - scrBase);
if (i > width)
i = width;
width -= i;
scr += i;
memcpy(win, sha, i * sizeof(FbBits));
sha += i;
}
shaLine += shaStride;
y++;
}
pbox++;
}
}
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