+++ /dev/null
-/***********************************************************
-
-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: mfbbresd.c,v 1.10 94/04/17 20:28:18 dpw Exp $ */
-#include "X.h"
-#include "misc.h"
-#include "mfb.h"
-#include "maskbits.h"
-#include "miline.h"
-
-/* Dashed bresenham line */
-
-#define StepDash\
- if (!--dashRemaining) { \
- if (++ dashIndex == numInDashList) \
- dashIndex = 0; \
- dashRemaining = pDash[dashIndex]; \
- rop = fgrop; \
- if (dashIndex & 1) \
- rop = bgrop; \
- }
-
-void
-mfbBresD(fgrop, bgrop,
- pdashIndex, pDash, numInDashList, pdashOffset, isDoubleDash,
- addrlbase, nlwidth,
- signdx, signdy, axis, x1, y1, e, e1, e2, len)
-int fgrop, bgrop;
-int *pdashIndex; /* current dash */
-unsigned char *pDash; /* dash list */
-int numInDashList; /* total length of dash list */
-int *pdashOffset; /* offset into current dash */
-int isDoubleDash;
-PixelType *addrlbase; /* pointer to base of bitmap */
-int nlwidth; /* width in longwords 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 yinc; /* increment to next scanline, in bytes */
- register PixelType *addrl;
- register int e3 = e2-e1;
- register unsigned long bit;
- PixelType leftbit = mask[0]; /* leftmost bit to process in new word */
- PixelType rightbit = mask[PPW-1]; /* rightmost bit to process in new word */
- int dashIndex;
- int dashOffset;
- int dashRemaining;
- int rop;
-
- dashOffset = *pdashOffset;
- dashIndex = *pdashIndex;
- dashRemaining = pDash[dashIndex] - dashOffset;
- rop = fgrop;
- if (!isDoubleDash)
- bgrop = -1;
- if (dashIndex & 1)
- rop = bgrop;
-
- /* point to longword containing first point */
- addrl = mfbScanline(addrlbase, x1, y1, nlwidth);
- yinc = signdy * nlwidth;
- e = e-e1; /* to make looping easier */
- bit = mask[x1 & PIM];
- if (axis == X_AXIS)
- {
- if (signdx > 0)
- {
- while(len--)
- {
- if (rop == RROP_BLACK)
- *addrl &= ~bit;
- else if (rop == RROP_WHITE)
- *addrl |= bit;
- else if (rop == RROP_INVERT)
- *addrl ^= bit;
- e += e1;
- if (e >= 0)
- {
- mfbScanlineInc(addrl, yinc);
- e += e3;
- }
- bit = SCRRIGHT(bit,1);
- if (!bit) { bit = leftbit;addrl ++; }
- StepDash
- }
- }
- else
- {
- while(len--)
- {
- if (rop == RROP_BLACK)
- *addrl &= ~bit;
- else if (rop == RROP_WHITE)
- *addrl |= bit;
- else if (rop == RROP_INVERT)
- *addrl ^= bit;
- e += e1;
- if (e >= 0)
- {
- mfbScanlineInc(addrl, yinc);
- e += e3;
- }
- bit = SCRLEFT(bit,1);
- if (!bit) { bit = rightbit;addrl --; }
- StepDash
- }
- }
- } /* if X_AXIS */
- else
- {
- if (signdx > 0)
- {
- while(len--)
- {
- if (rop == RROP_BLACK)
- *addrl &= ~bit;
- else if (rop == RROP_WHITE)
- *addrl |= bit;
- else if (rop == RROP_INVERT)
- *addrl ^= bit;
- e += e1;
- if (e >= 0)
- {
- bit = SCRRIGHT(bit,1);
- if (!bit) { bit = leftbit;addrl ++; }
- e += e3;
- }
- mfbScanlineInc(addrl, yinc);
- StepDash
- }
- }
- else
- {
- while(len--)
- {
- if (rop == RROP_BLACK)
- *addrl &= ~bit;
- else if (rop == RROP_WHITE)
- *addrl |= bit;
- else if (rop == RROP_INVERT)
- *addrl ^= bit;
- e += e1;
- if (e >= 0)
- {
- bit = SCRLEFT(bit,1);
- if (!bit) { bit = rightbit;addrl --; }
- e += e3;
- }
- mfbScanlineInc(addrl, yinc);
- StepDash
- }
- }
- } /* else Y_AXIS */
- *pdashIndex = dashIndex;
- *pdashOffset = pDash[dashIndex] - dashRemaining;
-}
projects / rdpsrv / blobdiff