178 lines
5.0 KiB
C
178 lines
5.0 KiB
C
/* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */
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/***********************************************************
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Copyright 1987, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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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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OPEN GROUP 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 Open Group 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 Open Group.
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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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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include <X11/X.h>
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#include "gc.h"
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#include "window.h"
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#include "pixmap.h"
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#include "region.h"
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#include "mfb.h"
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#include "maskbits.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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mfbHorzS(rop, addrl, nlwidth, x1, y1, len)
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int rop; /* a reduced rasterop */
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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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if (rop == RROP_BLACK)
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{
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*addrl &= ~startmask;
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}
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else if (rop == RROP_WHITE)
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{
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*addrl |= startmask;
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}
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else if (rop == RROP_INVERT)
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{
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*addrl ^= startmask;
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}
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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 (rop == RROP_BLACK)
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{
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if (startmask)
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*addrl++ &= ~startmask;
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Duff (nlmiddle, *addrl++ = 0x0);
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if (endmask)
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*addrl &= ~endmask;
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}
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else if (rop == RROP_WHITE)
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{
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if (startmask)
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*addrl++ |= startmask;
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Duff (nlmiddle, *addrl++ = ~0);
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if (endmask)
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*addrl |= endmask;
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}
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else if (rop == RROP_INVERT)
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{
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if (startmask)
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*addrl++ ^= startmask;
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Duff (nlmiddle, *addrl++ ^= ~0);
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if (endmask)
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*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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mfbVertS(rop, addrl, nlwidth, x1, y1, len)
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int rop; /* a reduced rasterop */
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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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if (rop == RROP_BLACK)
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{
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bitmask = rmask[x1 & PIM];
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Duff(len, *addrl &= bitmask; mfbScanlineInc(addrl, nlwidth) );
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}
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else if (rop == RROP_WHITE)
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{
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bitmask = mask[x1 & PIM];
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Duff(len, *addrl |= bitmask; mfbScanlineInc(addrl, nlwidth) );
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}
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else if (rop == RROP_INVERT)
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{
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bitmask = mask[x1 & PIM];
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Duff(len, *addrl ^= bitmask; mfbScanlineInc(addrl, nlwidth) );
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}
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}
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