120 lines
3.8 KiB
C
120 lines
3.8 KiB
C
/* $XFree86: xc/programs/Xserver/iplan2p4/iplpolypnt.c,v 3.0 1996/08/18 01:55:02 dawes Exp $ */
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/************************************************************
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Copyright (c) 1989 X Consortium
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of the X Consortium shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from the X Consortium.
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********************************************************/
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/* $XConsortium: iplpolypnt.c,v 5.17 94/04/17 20:28:57 dpw Exp $ */
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/* Modified nov 94 by Martin Schaller (Martin_Schaller@maus.r.de) for use with
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interleaved planes */
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#include "X.h"
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#include "gcstruct.h"
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#include "windowstr.h"
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#include "pixmapstr.h"
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#include "regionstr.h"
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#include "scrnintstr.h"
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#include "ipl.h"
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#include "iplmskbits.h"
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#define isClipped(c,ul,lr) ((((c) - (ul)) | ((lr) - (c))) & ClipMask)
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/* WARNING: pbox contains two shorts. This code assumes they are packed
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* and can be referenced together as an INT32.
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*/
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#define PointLoop(fill) { \
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for (nbox = REGION_NUM_RECTS(cclip), pbox = REGION_RECTS(cclip); \
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--nbox >= 0; \
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pbox++) \
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{ \
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c1 = *((INT32 *) &pbox->x1) - off; \
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c2 = *((INT32 *) &pbox->x2) - off - 0x00010001; \
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for (ppt = (INT32 *) pptInit, i = npt; --i >= 0;) \
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{ \
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pt = *ppt++; \
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if (!isClipped(pt,c1,c2)) { \
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fill \
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} \
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} \
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} \
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}
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void
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iplPolyPoint(pDrawable, pGC, mode, npt, pptInit)
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DrawablePtr pDrawable;
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GCPtr pGC;
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int mode;
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int npt;
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xPoint *pptInit;
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{
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register INT32 pt;
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register INT32 c1, c2;
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register unsigned long ClipMask = 0x80008000;
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INTER_DECLAREG(*addrg);
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register int ngwidth;
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register int xoffset;
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INTER_DECLAREG(*addrgt);
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register INT32 *ppt;
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RegionPtr cclip;
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int nbox;
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register int i;
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register BoxPtr pbox;
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INTER_DECLARERRAX(and);
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INTER_DECLARERRAX(xor);
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int rop = pGC->alu;
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int off;
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iplPrivGCPtr devPriv;
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xPoint *pptPrev;
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devPriv =iplGetGCPrivate(pGC);
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rop = devPriv->rop;
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if (rop == GXnoop)
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return;
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cclip = pGC->pCompositeClip;
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xor = devPriv->xorg;
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and = devPriv->andg;
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if ((mode == CoordModePrevious) && (npt > 1))
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{
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for (pptPrev = pptInit + 1, i = npt - 1; --i >= 0; pptPrev++)
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{
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pptPrev->x += (pptPrev-1)->x;
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pptPrev->y += (pptPrev-1)->y;
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}
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}
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off = *((int *) &pDrawable->x);
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off -= (off & 0x8000) << 1;
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iplGetGroupWidthAndPointer(pDrawable, ngwidth, addrg);
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addrg = addrg + pDrawable->y * ngwidth +
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(pDrawable->x >> INTER_PGSH) * INTER_PLANES;
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xoffset = pDrawable->x & INTER_PIM;
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PointLoop( addrgt = addrg + intToY(pt) * ngwidth
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+ ((intToX(pt) + xoffset) >> INTER_PGSH) * INTER_PLANES;
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INTER_DoMaskRRop(addrgt, and, xor,
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iplmask[(intToX(pt) + xoffset) & INTER_PIM], addrgt);
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)
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}
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