/* $XConsortium: p9000seg.c,v 1.1 95/01/16 12:28:13 kaleb Exp $ */ /* $XFree86: xc/programs/Xserver/hw/xfree86/accel/p9000/p9000seg.c,v 3.1 1995/01/28 15:55:07 dawes Exp $ */ /* Copyright (c) 1987 X Consortium Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of the X Consortium shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from the X Consortium. Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts, Copyright 1993 by Kevin E. Martin, Chapel Hill, North Carolina. All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, 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 Digital not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. DIGITAL, KEVIN E. MARTIN, RICKARD E. FAITH, CRAIG E. GROESCHEL AND CHRIS MASON DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL DIGITAL OR KEVIN E. MARTIN OR RICKARD E. FAITH OR CRAIG E. GROESCHEL OR CHRIS MASON 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. Modified for the 8514/A by Kevin E. Martin (martin@cs.unc.edu) Modified for the Mach-8 by Rickard E. Faith (faith@cs.unc.edu) Modified for the Mach32 by Kevin E. Martin (martin@cs.unc.edu) mach32Line1Rect by Craig E. Groeschel (craig@adikia.sccsi.com), based on an ATI preclipping code example Modfied for the p9000 by Chris Mason (mason@mail.csh.rit.edu) */ #include "X.h" #include "gcstruct.h" #include "windowstr.h" #include "pixmapstr.h" #include "regionstr.h" #include "scrnintstr.h" #include "mistruct.h" #include "miline.h" #include "cfb.h" #include "cfbmskbits.h" #include "p9000.h" #include "p9000reg.h" #ifdef MINSHORT #undef MINSHORT #undef MAXSHORT #endif /* The p9000 considers a line a very skinny rectangle. This code works a little different than the mach32/s3/8514. For each set of endpoints, the coord regs are loaded once. For each clipping region, the clipping regs are loaded and a quad is drawn. Here too, software clipping should be better for more than one clipping region. This is not bad, but.... */ void p9000Segment(pDrawable, pGC, nseg, pSeg) DrawablePtr pDrawable; GCPtr pGC; int nseg ; register xSegment *pSeg ; { int nboxInit; register int nbox; BoxPtr pboxInit; register BoxPtr pbox; int xorg, yorg; /* origin of window */ register int y1, y2; register int x1, x2; RegionPtr cclip; cfbPrivGCPtr devPriv; int old_w_min, old_w_max ; /* saves previous clipping regs */ register int oldpixel ; /* saves last pixel for capnotlast */ /* if the drawable is off screen, let the cfb code do it */ if (!OnScreenDrawable(pDrawable->type) || !xf86VTSema) { cfbSegmentSS(pDrawable, pGC, nseg, pSeg ) ; return ; } devPriv = (cfbPrivGC *)(pGC->devPrivates[cfbGCPrivateIndex].ptr); cclip = devPriv->pCompositeClip; pboxInit = REGION_RECTS(cclip); nboxInit = REGION_NUM_RECTS(cclip); p9000NotBusy() ; old_w_min = p9000Fetch(W_MIN,CtlBase) ; old_w_max = p9000Fetch(W_MAX,CtlBase) ; /* p9000 does not properly update the meta coord index sometimes, so we must make sure it is right before hand */ p9000Store(CINDEX,CtlBase,0) ; p9000Store(PMASK,CtlBase,pGC->planemask) ; p9000Store(RASTER,CtlBase,IGM_OVERSIZED | p9000QuadAlu[pGC->alu]) ; p9000Store(FGROUND,CtlBase,pGC->fgPixel) ; p9000Store(BGROUND,CtlBase,pGC->bgPixel) ; p9000Store(W_OFFSET_XY,CtlBase,(int)0) ; xorg = pDrawable->x; yorg = pDrawable->y ; while(nseg--) { nbox = nboxInit ; pbox = pboxInit ; x1 = pSeg -> x1 + xorg ; x2 = pSeg -> x2 + xorg ; y2 = pSeg -> y2 + yorg ; y1 = pSeg -> y1 + yorg ; pSeg++ ; if ( (y1 < 0) && (y2 < 0) ) /* whole line is clipped */ continue ; /* save pixel value of last point for CapNotLast */ if ((pGC->capStyle == CapNotLast) && (x2 >= 0)) { oldpixel = p9000Fetch(p9000InfoRec.virtualX*y2*p9000BytesPerPixel+ p9000BytesPerPixel * x2, VidBase) ; } /* * we only have to load up the coord regs once for every line we want to * clip against. Once they are loaded, just change the clipping box and * redraw the quad. */ p9000Store(META_COORD | MC_LINE | MC_X, CtlBase, x1) ; p9000Store(META_COORD | MC_LINE | MC_Y, CtlBase, y1) ; p9000Store(META_COORD | MC_LINE | MC_X, CtlBase, x2) ; p9000Store(META_COORD | MC_LINE | MC_Y, CtlBase, y2) ; while(nbox--) { p9000NotBusy() ; p9000Store(W_MIN, CtlBase, YX_PACK(pbox->x1,pbox->y1)) ; p9000Store(W_MAX, CtlBase, YX_PACK(pbox->x2-1,pbox->y2-1)) ; if (!(p9000Fetch(STATUS, CtlBase) & SR_Q_HIDDEN)) while(p9000Fetch(CMD_QUAD,CtlBase) & SR_ISSUE_QBN) ; pbox++ ; } /* while(nbox--) */ /* restore last point if CapNotLast */ if ((pGC->capStyle == CapNotLast) && (x2 >= 0)) { register int tmp ; p9000QBNotBusy() ; tmp = p9000Fetch(p9000InfoRec.virtualX*y2* p9000BytesPerPixel + p9000BytesPerPixel * x2, VidBase) ; /* pick the right byte for this pixel */ switch(x2 & 3) { case 0: oldpixel &= 0x000000FFL ; oldpixel |= tmp & 0xFFFFFF00L ; break ; case 1: oldpixel &= 0x0000FF00L ; oldpixel |= tmp & 0xFFFF00FFL ; break ; case 2: oldpixel &= 0x00FF0000L ; oldpixel |= tmp & 0xFF00FFFFL ; break ; case 3: oldpixel &= 0xFF000000L ; oldpixel |= tmp & 0x00FFFFFFL ; break ; } p9000Store(p9000InfoRec.virtualX * y2 * p9000BytesPerPixel + p9000BytesPerPixel * x2, VidBase, oldpixel) ; } } /* while(--npt) */ p9000NotBusy() ; p9000Store(W_MIN,CtlBase,old_w_min) ; p9000Store(W_MAX,CtlBase,old_w_max) ; p9000QBNotBusy() ; }