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/*
* $XFree86$
*
* 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.
*/
/*
* Thanks to Daniel Chemko <dchemko@intrinsyc.com> for making the 90 and 180
* orientations work.
*/
#include "X.h"
#include "scrnintstr.h"
#include "windowstr.h"
#include "font.h"
#include "dixfontstr.h"
#include "fontstruct.h"
#include "mi.h"
#include "regionstr.h"
#include "globals.h"
#include "gcstruct.h"
#include "shadow.h"
#include "fb.h"
#define DANDEBUG 0
#if ROTATE == 270
#define SCRLEFT(x,y,w,h) (pScreen->height - ((y) + (h)))
#define SCRY(x,y,w,h) (x)
#define SCRWIDTH(x,y,w,h) (h)
#define FIRSTSHA(x,y,w,h) (((y) + (h) - 1) * shaStride + (x))
#define STEPDOWN(x,y,w,h) ((w)--)
#define NEXTY(x,y,w,h) ((x)++)
#define SHASTEPX(stride) -(stride)
#define SHASTEPY(stride) (1)
#elif ROTATE == 90
#define SCRLEFT(x,y,w,h) (y)
#define SCRY(x,y,w,h) (pScreen->width - ((x) + (w)) - 1)
#define SCRWIDTH(x,y,w,h) (h)
#define FIRSTSHA(x,y,w,h) ((y) * shaStride + (x + w - 1))
#define STEPDOWN(x,y,w,h) ((w)--)
#define NEXTY(x,y,w,h) ((void)(x))
#define SHASTEPX(stride) (stride)
#define SHASTEPY(stride) (-1)
#elif ROTATE == 180
#define SCRLEFT(x,y,w,h) (pScreen->width - ((x) + (w)))
#define SCRY(x,y,w,h) (pScreen->height - ((y) + (h)) - 1)
#define SCRWIDTH(x,y,w,h) (w)
#define FIRSTSHA(x,y,w,h) ((y + h - 1) * shaStride + (x + w - 1))
#define STEPDOWN(x,y,w,h) ((h)--)
#define NEXTY(x,y,w,h) ((void)(y))
#define SHASTEPX(stride) (-1)
#define SHASTEPY(stride) -(stride)
#else
#define SCRLEFT(x,y,w,h) (x)
#define SCRY(x,y,w,h) (y)
#define SCRWIDTH(x,y,w,h) (w)
#define FIRSTSHA(x,y,w,h) ((y) * shaStride + (x))
#define STEPDOWN(x,y,w,h) ((h)--)
#define NEXTY(x,y,w,h) ((y)++)
#define SHASTEPX(stride) (1)
#define SHASTEPY(stride) (stride)
#endif
void
FUNC (ScreenPtr pScreen,
shadowBufPtr pBuf)
{
RegionPtr damage = &pBuf->damage;
PixmapPtr pShadow = pBuf->pPixmap;
int nbox = REGION_NUM_RECTS (damage);
BoxPtr pbox = REGION_RECTS (damage);
FbBits *shaBits;
Data *shaBase, *shaLine, *sha;
FbStride shaStride;
int scrBase, scrLine, scr;
int shaBpp;
int shaXoff, shaYoff; /* XXX assumed to be zero */
int x, y, w, h, width;
int i;
Data *winBase = NULL, *win;
CARD32 winSize;
fbGetDrawable (&pShadow->drawable, shaBits, shaStride, shaBpp, shaXoff, shaYoff);
shaBase = (Data *) shaBits;
shaStride = shaStride * sizeof (FbBits) / sizeof (Data);
#if (DANDEBUG > 1)
ErrorF ("-> Entering Shadow Update:\r\n |- Origins: pShadow=%x, pScreen=%x, damage=%x\r\n |- Metrics: shaStride=%d, shaBase=%x, shaBpp=%d\r\n | \n", pShadow, pScreen, damage, shaStride, shaBase, shaBpp);
#endif
while (nbox--)
{
x = pbox->x1;
y = pbox->y1;
w = (pbox->x2 - pbox->x1);
h = pbox->y2 - pbox->y1;
#if (DANDEBUG > 2)
ErrorF (" |-> Redrawing box - Metrics: X=%d, Y=%d, Width=%d, Height=%d\n", x, y, w, h);
#endif
scrLine = SCRLEFT(x,y,w,h);
shaLine = shaBase + FIRSTSHA(x,y,w,h);
while (STEPDOWN(x,y,w,h))
{
winSize = 0;
scrBase = 0;
width = SCRWIDTH(x,y,w,h);
scr = scrLine;
sha = shaLine;
#if (DANDEBUG > 3)
ErrorF (" | |-> StepDown - Metrics: width=%d, scr=%x, sha=%x\n", width, scr, sha);
#endif
while (width)
{
/* how much remains in this window */
i = scrBase + winSize - scr;
if (i <= 0 || scr < scrBase)
{
winBase = (Data *) (*pBuf->window) (pScreen,
SCRY(x,y,w,h),
scr * sizeof (Data),
SHADOW_WINDOW_WRITE,
&winSize,
pBuf->closure);
if(!winBase)
return;
scrBase = scr;
winSize /= sizeof (Data);
i = winSize;
#if(DANDEBUG > 4)
ErrorF (" | | |-> Starting New Line - Metrics: winBase=%x, scrBase=%x, winSize=%d\r\n | | | Xstride=%d, Ystride=%d, w=%d h=%d\n", winBase, scrBase, winSize, SHASTEPX(shaStride), SHASTEPY(shaStride), w, h);
#endif
}
win = winBase + (scr - scrBase);
if (i > width)
i = width;
width -= i;
scr += i;
#if(DANDEBUG > 5)
ErrorF (" | | |-> Writing Line - Metrics: win=%x, sha=%x\n", win, sha);
#endif
while (i--)
{
#if(DANDEBUG > 6)
ErrorF (" | | |-> Writing Pixel - Metrics: win=%x, sha=%d, remaining=%d\n", win, sha, i);
#endif
*win++ = *sha;
sha += SHASTEPX(shaStride);
} /* i */
} /* width */
shaLine += SHASTEPY(shaStride);
NEXTY(x,y,w,h);
} /* STEPDOWN */
pbox++;
} /* nbox */
}
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