180 lines
5.0 KiB
C
180 lines
5.0 KiB
C
/*
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* $XFree86: xc/programs/Xserver/miext/shadow/shplanar.c,v 1.3 2001/05/29 04:54:13 keithp Exp $
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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 <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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/*
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* 32 4-bit pixels per write
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*/
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#define PL_SHIFT 7
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#define PL_UNIT (1 << PL_SHIFT)
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#define PL_MASK (PL_UNIT - 1)
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/*
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* 32->8 conversion:
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*
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* 7 6 5 4 3 2 1 0
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* A B C D E F G H
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*
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* 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
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* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
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* m . . . H . . . G . . . F . . . E . . . D . . . C . . . B . . . A
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* m1 G . . . F . . . E . . . D . . . C . . . B . . . A . . . . . . . m << (7 - (p))
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* m2 . H . . . G . . . F . . . E . . . D . . . C . . . B . . . A . . (m >> (p)) << 2
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* m3 G E C A m1 & 0x80808080
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* m4 H F D B m2 & 0x40404040
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* m5 G H E F C D A B m3 | m4
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* m6 G H E F C D G H A B E F m5 | (m5 >> 20)
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* m7 G H E F C D G H A B C D E F G H m6 | (m6 >> 10)
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*/
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#if 0
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#define GetBits(p,o,d) {\
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m = sha[o]; \
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m1 = m << (7 - (p)); \
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m2 = (m >> (p)) << 2; \
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m3 = m1 & 0x80808080; \
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m4 = m2 & 0x40404040; \
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m5 = m3 | m4; \
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m6 = m5 | (m5 >> 20); \
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d = m6 | (m6 >> 10); \
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}
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#else
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#define GetBits(p,o,d) {\
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m = sha[o]; \
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m5 = ((m << (7 - (p))) & 0x80808080) | (((m >> (p)) << 2) & 0x40404040); \
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m6 = m5 | (m5 >> 20); \
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d = m6 | (m6 >> 10); \
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}
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#endif
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void
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shadowUpdatePlanar4 (ScreenPtr pScreen,
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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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CARD32 *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, shaYoff; /* 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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CARD32 *winBase = NULL, *win;
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CARD32 winSize;
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int plane;
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CARD32 m,m5,m6;
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CARD8 s1, s2, s3, s4;
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fbGetStipDrawable (&pShadow->drawable, shaBase, shaStride, shaBpp, shaXoff, shaYoff);
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while (nbox--)
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{
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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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w = (w + (x & PL_MASK) + PL_MASK) >> PL_SHIFT;
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x &= ~PL_MASK;
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scrLine = (x >> PL_SHIFT);
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shaLine = shaBase + y * shaStride + (x >> FB_SHIFT);
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while (h--)
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{
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for (plane = 0; plane < 4; plane++)
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{
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width = w;
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scr = scrLine;
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sha = shaLine;
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winSize = 0;
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scrBase = 0;
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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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{
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winBase = (CARD32 *) (*pBuf->window) (pScreen,
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y,
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(scr << 4) | (plane),
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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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winSize >>= 2;
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scrBase = scr;
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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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while (i--)
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{
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GetBits(plane,0,s1);
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GetBits(plane,1,s2);
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GetBits(plane,2,s3);
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GetBits(plane,3,s4);
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*win++ = s1 | (s2 << 8) | (s3 << 16) | (s4 << 24);
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sha += 4;
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}
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}
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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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shadowUpdateProc shadowUpdatePlanar4Weak(void) {
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return shadowUpdatePlanar4;
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}
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shadowUpdateProc shadowUpdatePlanar4x8Weak(void) {
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return shadowUpdatePlanar4x8;
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}
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