136 lines
4.2 KiB
C
136 lines
4.2 KiB
C
/* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */
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/***********************************************************
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Copyright (c) 1987 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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Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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/* GJA -- modified this file for vga16 */
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include "xf4bpp.h"
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#include "OScompiler.h"
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#include "mfbmap.h"
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#include "mfb.h"
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#include "maskbits.h"
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#include "wm3.h"
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/* horizontal solid line
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abs(len) > 1
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*/
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void
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xf4bppHorzS(addrl, nlwidth, x1, y1, len)
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register PixelType *addrl; /* pointer to base of bitmap */
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register int nlwidth; /* width in longwords of bitmap */
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int x1; /* initial point */
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int y1;
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int len; /* length of line */
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{
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register PixelType startmask;
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register PixelType endmask;
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register int nlmiddle;
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/* force the line to go left to right
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but don't draw the last point
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*/
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if (len < 0)
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{
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x1 += len;
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x1 += 1;
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len = -len;
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}
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addrl = mfbScanline(addrl, x1, y1, nlwidth);
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/* all bits inside same longword */
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if ( ((x1 & PIM) + len) < PPW)
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{
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maskpartialbits(x1, len, startmask);
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UPDRW(addrl,startmask);
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}
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else
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{
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maskbits(x1, len, startmask, endmask, nlmiddle);
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if (startmask) {
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UPDRW(addrl,startmask); addrl++;
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}
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Duff (nlmiddle, UPDRW(addrl,~0); addrl++);
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if (endmask) {
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UPDRW(addrl,endmask);
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}
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}
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}
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/* vertical solid line
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this uses do loops because pcc (Ultrix 1.2, bsd 4.2) generates
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better code. sigh. we know that len will never be 0 or 1, so
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it's OK to use it.
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*/
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void
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xf4bppVertS(addrl, nlwidth, x1, y1, len)
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register PixelType *addrl; /* pointer to base of bitmap */
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register int nlwidth; /* width in longwords of bitmap */
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int x1, y1; /* initial point */
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register int len; /* length of line */
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{
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register PixelType bitmask;
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addrl = mfbScanline(addrl, x1, y1, nlwidth);
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if (len < 0)
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{
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nlwidth = -nlwidth;
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len = -len;
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}
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bitmask = mfbGetmask(x1 & PIM);
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Duff(len, UPDRW(addrl,bitmask); addrl += nlwidth);
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}
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