208 lines
6.7 KiB
C
208 lines
6.7 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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/*
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* Thanks to Daniel Chemko <dchemko@intrinsyc.com> for making the 90 and 180
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* orientations work.
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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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#define DANDEBUG 0
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#if ROTATE == 270
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#define SCRLEFT(x,y,w,h) (pScreen->height - ((y) + (h)))
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#define SCRY(x,y,w,h) (x)
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#define SCRWIDTH(x,y,w,h) (h)
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#define FIRSTSHA(x,y,w,h) (((y) + (h) - 1) * shaStride + (x))
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#define STEPDOWN(x,y,w,h) ((w)--)
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#define NEXTY(x,y,w,h) ((x)++)
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#define SHASTEPX(stride) -(stride)
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#define SHASTEPY(stride) (1)
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#elif ROTATE == 90
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#define SCRLEFT(x,y,w,h) (y)
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#define SCRY(x,y,w,h) (pScreen->width - ((x) + (w)) - 1)
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#define SCRWIDTH(x,y,w,h) (h)
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#define FIRSTSHA(x,y,w,h) ((y) * shaStride + (x + w - 1))
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#define STEPDOWN(x,y,w,h) ((w)--)
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#define NEXTY(x,y,w,h) ((void)(x))
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#define SHASTEPX(stride) (stride)
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#define SHASTEPY(stride) (-1)
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#elif ROTATE == 180
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#define SCRLEFT(x,y,w,h) (pScreen->width - ((x) + (w)))
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#define SCRY(x,y,w,h) (pScreen->height - ((y) + (h)) - 1)
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#define SCRWIDTH(x,y,w,h) (w)
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#define FIRSTSHA(x,y,w,h) ((y + h - 1) * shaStride + (x + w - 1))
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#define STEPDOWN(x,y,w,h) ((h)--)
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#define NEXTY(x,y,w,h) ((void)(y))
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#define SHASTEPX(stride) (-1)
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#define SHASTEPY(stride) -(stride)
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#else
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#define SCRLEFT(x,y,w,h) (x)
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#define SCRY(x,y,w,h) (y)
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#define SCRWIDTH(x,y,w,h) (w)
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#define FIRSTSHA(x,y,w,h) ((y) * shaStride + (x))
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#define STEPDOWN(x,y,w,h) ((h)--)
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#define NEXTY(x,y,w,h) ((y)++)
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#define SHASTEPX(stride) (1)
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#define SHASTEPY(stride) (stride)
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#endif
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void
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FUNC(ScreenPtr pScreen, shadowBufPtr pBuf)
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{
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RegionPtr damage = shadowDamage(pBuf);
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PixmapPtr pShadow = pBuf->pPixmap;
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int nbox = REGION_NUM_RECTS(damage);
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BoxPtr pbox = REGION_RECTS(damage);
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FbBits *shaBits;
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Data *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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int shaXoff _X_UNUSED, shaYoff _X_UNUSED; /* XXX assumed to be zero */
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int x, y, w, h, width;
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int i;
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Data *winBase = NULL, *win;
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CARD32 winSize;
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fbGetDrawable(&pShadow->drawable, shaBits, shaStride, shaBpp, shaXoff,
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shaYoff);
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shaBase = (Data *) shaBits;
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shaStride = shaStride * sizeof(FbBits) / sizeof(Data);
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#if (DANDEBUG > 1)
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ErrorF
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("-> Entering Shadow Update:\r\n |- Origins: pShadow=%x, pScreen=%x, damage=%x\r\n |- Metrics: shaStride=%d, shaBase=%x, shaBpp=%d\r\n | \n",
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pShadow, pScreen, damage, shaStride, shaBase, shaBpp);
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#endif
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while (nbox--) {
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x = pbox->x1;
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y = pbox->y1;
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w = (pbox->x2 - pbox->x1);
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h = pbox->y2 - pbox->y1;
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#if (DANDEBUG > 2)
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ErrorF
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(" |-> Redrawing box - Metrics: X=%d, Y=%d, Width=%d, Height=%d\n",
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x, y, w, h);
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#endif
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scrLine = SCRLEFT(x, y, w, h);
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shaLine = shaBase + FIRSTSHA(x, y, w, h);
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while (STEPDOWN(x, y, w, h)) {
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winSize = 0;
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scrBase = 0;
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width = SCRWIDTH(x, y, w, h);
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scr = scrLine;
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sha = shaLine;
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#if (DANDEBUG > 3)
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ErrorF(" | |-> StepDown - Metrics: width=%d, scr=%x, sha=%x\n",
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width, scr, sha);
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#endif
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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 = (Data *) (*pBuf->window) (pScreen,
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SCRY(x, y, w, h),
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scr * sizeof(Data),
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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(Data);
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i = winSize;
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#if(DANDEBUG > 4)
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ErrorF
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(" | | |-> Starting New Line - Metrics: winBase=%x, scrBase=%x, winSize=%d\r\n | | | Xstride=%d, Ystride=%d, w=%d h=%d\n",
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winBase, scrBase, winSize, SHASTEPX(shaStride),
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SHASTEPY(shaStride), w, h);
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#endif
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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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#if(DANDEBUG > 5)
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ErrorF
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(" | | |-> Writing Line - Metrics: win=%x, sha=%x\n",
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win, sha);
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#endif
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while (i--) {
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#if(DANDEBUG > 6)
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ErrorF
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(" | | |-> Writing Pixel - Metrics: win=%x, sha=%d, remaining=%d\n",
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win, sha, i);
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#endif
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*win++ = *sha;
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sha += SHASTEPX(shaStride);
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} /* i */
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} /* width */
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shaLine += SHASTEPY(shaStride);
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NEXTY(x, y, w, h);
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} /* STEPDOWN */
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pbox++;
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} /* nbox */
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}
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