diff options
Diffstat (limited to 'nx-X11/programs/Xserver/iplan2p4/iplbresd.c')
| -rw-r--r-- | nx-X11/programs/Xserver/iplan2p4/iplbresd.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/nx-X11/programs/Xserver/iplan2p4/iplbresd.c b/nx-X11/programs/Xserver/iplan2p4/iplbresd.c new file mode 100644 index 000000000..61b154135 --- /dev/null +++ b/nx-X11/programs/Xserver/iplan2p4/iplbresd.c @@ -0,0 +1,212 @@ +/* $XFree86$ */ +/*********************************************************** + +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. + + 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 DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING +ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL +DIGITAL 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. + +******************************************************************/ +/* $XConsortium: iplbresd.c,v 1.16 94/04/17 20:28:45 dpw Exp $ */ + +/* Modified nov 94 by Martin Schaller (Martin_Schaller@maus.r.de) for use with +interleaved planes */ + +#ifdef HAVE_DIX_CONFIG_H +#include <dix-config.h> +#endif + +#include <X11/X.h> +#include "misc.h" +#include "ipl.h" +#include "miline.h" +#include "iplmskbits.h" + +/* Dashed bresenham line */ + +void +iplBresD(rrops, + pdashIndex, pDash, numInDashList, pdashOffset, isDoubleDash, + addrg, ngwidth, + signdx, signdy, axis, x1, y1, e, e1, e2, len) + iplRRopPtr rrops; + int *pdashIndex; /* current dash */ + unsigned char *pDash; /* dash list */ + int numInDashList; /* total length of dash list */ + int *pdashOffset; /* offset into current dash */ + int isDoubleDash; + INTER_DECLAREG(*addrg); /* pointer to base of bitmap */ + int ngwidth; /* width in groups of bitmap */ + int signdx, signdy; /* signs of directions */ + int axis; /* major axis (Y_AXIS or X_AXIS) */ + int x1, y1; /* initial point */ + register int e; /* error accumulator */ + register int e1; /* bresenham increments */ + int e2; + int len; /* length of line */ +{ + register int e3 = e2-e1; + int dashIndex; + int dashOffset; + int dashRemaining; + INTER_DECLARERRAX(xorFg); + INTER_DECLARERRAX(andFg); + INTER_DECLARERRAX(xorBg); + INTER_DECLARERRAX(andBg); + int thisDash; + + dashOffset = *pdashOffset; + dashIndex = *pdashIndex; + xorFg = rrops[0].xorg; + andFg = rrops[0].andg; + xorBg = rrops[1].xorg; + andBg = rrops[1].andg; + dashRemaining = pDash[dashIndex] - dashOffset; + if ((thisDash = dashRemaining) >= len) + { + thisDash = len; + dashRemaining -= len; + } + e = e-e1; /* to make looping easier */ + +#define BresStep(minor,major) {if ((e += e1) >= 0) { e += e3; minor; } major;} + +#define NextDash {\ + dashIndex++; \ + if (dashIndex == numInDashList) \ + dashIndex = 0; \ + dashRemaining = pDash[dashIndex]; \ + if ((thisDash = dashRemaining) >= len) \ + { \ + dashRemaining -= len; \ + thisDash = len; \ + } \ +} + + { + INTER_DECLAREG(startbit); + INTER_DECLAREG(bit); + + /* point to longword containing first point */ + addrg = addrg + (y1 * ngwidth) + (x1 >> INTER_PGSH) * INTER_PLANES; + signdy = signdy * ngwidth; + signdx = signdx * INTER_PLANES; + + if (signdx > 0) + startbit = iplmask[0]; + else + startbit = iplmask[INTER_PPG-1]; + bit = iplmask[x1 & INTER_PIM]; + +#define X_Loop(store) while(thisDash--) {\ + store; \ + BresStep(addrg += signdy, \ + if (signdx > 0) \ + bit >>= 1; \ + else \ + bit <<= 1; \ + if (!bit) \ + { \ + bit = startbit; \ + addrg += signdx; \ + }) \ + } +#define Y_Loop(store) while(thisDash--) {\ + store; \ + BresStep(if (signdx > 0) \ + bit >>= 1; \ + else \ + bit <<= 1; \ + if (!bit) \ + { \ + bit = startbit; \ + addrg += signdx; \ + }, \ + addrg += signdy) \ + } + + if (axis == X_AXIS) + { + for (;;) + { + len -= thisDash; + if (dashIndex & 1) { + if (isDoubleDash) { + X_Loop( + INTER_DoMaskRRop(addrg, andBg, xorBg, bit, addrg); + ) + } else { + X_Loop(;) + } + } else { + X_Loop(INTER_DoMaskRRop(addrg, andFg, xorFg, bit, addrg)); + } + if (!len) + break; + NextDash + } + } /* if X_AXIS */ + else + { + for (;;) + { + len -= thisDash; + if (dashIndex & 1) { + if (isDoubleDash) { + Y_Loop( + INTER_DoMaskRRop(addrg, andBg, xorBg, bit, addrg); + ) + } else { + Y_Loop(;) + } + } else { + Y_Loop(INTER_DoMaskRRop(addrg, andFg, xorFg, bit, addrg)); + } + if (!len) + break; + NextDash + } + } /* else Y_AXIS */ + } + *pdashIndex = dashIndex; + *pdashOffset = pDash[dashIndex] - dashRemaining; +} |