708 lines
18 KiB
C
708 lines
18 KiB
C
/***********************************************************
|
|
|
|
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.
|
|
|
|
******************************************************************/
|
|
|
|
#ifdef HAVE_DIX_CONFIG_H
|
|
#include <dix-config.h>
|
|
#endif
|
|
|
|
#include <X11/X.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "gcstruct.h"
|
|
#include "windowstr.h"
|
|
#include "pixmapstr.h"
|
|
#include "regionstr.h"
|
|
#include "scrnintstr.h"
|
|
#include "mistruct.h"
|
|
|
|
#include "afb.h"
|
|
#include "maskbits.h"
|
|
#include "miline.h"
|
|
|
|
/* single-pixel lines on a color frame buffer
|
|
|
|
NON-SLOPED LINES
|
|
horizontal lines are always drawn left to right; we have to
|
|
move the endpoints right by one after they're swapped.
|
|
horizontal lines will be confined to a single band of a
|
|
region. the code finds that band (giving up if the lower
|
|
bound of the band is above the line we're drawing); then it
|
|
finds the first box in that band that contains part of the
|
|
line. we clip the line to subsequent boxes in that band.
|
|
vertical lines are always drawn top to bottom (y-increasing.)
|
|
this requires adding one to the y-coordinate of each endpoint
|
|
after swapping.
|
|
|
|
SLOPED LINES
|
|
when clipping a sloped line, we bring the second point inside
|
|
the clipping box, rather than one beyond it, and then add 1 to
|
|
the length of the line before drawing it. this lets us use
|
|
the same box for finding the outcodes for both endpoints. since
|
|
the equation for clipping the second endpoint to an edge gives us
|
|
1 beyond the edge, we then have to move the point towards the
|
|
first point by one step on the major axis.
|
|
eventually, there will be a diagram here to explain what's going
|
|
on. the method uses Cohen-Sutherland outcodes to determine
|
|
outsideness, and a method similar to Pike's layers for doing the
|
|
actual clipping.
|
|
|
|
*/
|
|
|
|
void
|
|
#ifdef POLYSEGMENT
|
|
afbSegmentSS(pDrawable, pGC, nseg, pSeg)
|
|
DrawablePtr pDrawable;
|
|
GCPtr pGC;
|
|
int nseg;
|
|
register xSegment *pSeg;
|
|
#else
|
|
afbLineSS(pDrawable, pGC, mode, npt, pptInit)
|
|
DrawablePtr pDrawable;
|
|
GCPtr pGC;
|
|
int mode; /* Origin or Previous */
|
|
int npt; /* number of points */
|
|
DDXPointPtr pptInit;
|
|
#endif
|
|
{
|
|
int nboxInit;
|
|
register int nbox;
|
|
BoxPtr pboxInit;
|
|
register BoxPtr pbox;
|
|
#ifndef POLYSEGMENT
|
|
register DDXPointPtr ppt; /* pointer to list of translated points */
|
|
#endif
|
|
|
|
unsigned int oc1; /* outcode of point 1 */
|
|
unsigned int oc2; /* outcode of point 2 */
|
|
|
|
PixelType *addrlBase; /* pointer to start of drawable */
|
|
int nlwidth; /* width in longwords of destination pixmap */
|
|
int xorg, yorg; /* origin of window */
|
|
|
|
int adx; /* abs values of dx and dy */
|
|
int ady;
|
|
int signdx; /* sign of dx and dy */
|
|
int signdy;
|
|
int e, e1, e2; /* bresenham error and increments */
|
|
int len; /* length of segment */
|
|
int axis; /* major axis */
|
|
int octant;
|
|
unsigned int bias = miGetZeroLineBias(pDrawable->pScreen);
|
|
int depthDst;
|
|
#ifndef POLYSEGMENT
|
|
PixelType *addrl; /* address of destination pixmap */
|
|
int d;
|
|
#endif
|
|
int sizeDst;
|
|
unsigned char *rrops;
|
|
|
|
/* a bunch of temporaries */
|
|
register int y1, y2;
|
|
register int x1, x2;
|
|
RegionPtr cclip;
|
|
|
|
cclip = pGC->pCompositeClip;
|
|
rrops = ((afbPrivGC *)dixLookupPrivate(&pGC->devPrivates,
|
|
afbGCPrivateKey))->rrops;
|
|
pboxInit = REGION_RECTS(cclip);
|
|
nboxInit = REGION_NUM_RECTS(cclip);
|
|
|
|
afbGetPixelWidthSizeDepthAndPointer(pDrawable, nlwidth, sizeDst, depthDst,
|
|
addrlBase);
|
|
|
|
xorg = pDrawable->x;
|
|
yorg = pDrawable->y;
|
|
#ifdef POLYSEGMENT
|
|
while (nseg--)
|
|
#else
|
|
ppt = pptInit;
|
|
x2 = ppt->x + xorg;
|
|
y2 = ppt->y + yorg;
|
|
while(--npt)
|
|
#endif
|
|
{
|
|
nbox = nboxInit;
|
|
pbox = pboxInit;
|
|
|
|
#ifdef POLYSEGMENT
|
|
x1 = pSeg->x1 + xorg;
|
|
y1 = pSeg->y1 + yorg;
|
|
x2 = pSeg->x2 + xorg;
|
|
y2 = pSeg->y2 + yorg;
|
|
pSeg++;
|
|
#else
|
|
x1 = x2;
|
|
y1 = y2;
|
|
++ppt;
|
|
if (mode == CoordModePrevious) {
|
|
xorg = x1;
|
|
yorg = y1;
|
|
}
|
|
x2 = ppt->x + xorg;
|
|
y2 = ppt->y + yorg;
|
|
#endif
|
|
|
|
if (x1 == x2) /* vertical line */
|
|
{
|
|
/* make the line go top to bottom of screen, keeping
|
|
endpoint semantics
|
|
*/
|
|
if (y1 > y2) {
|
|
register int tmp;
|
|
|
|
tmp = y2;
|
|
y2 = y1 + 1;
|
|
y1 = tmp + 1;
|
|
#ifdef POLYSEGMENT
|
|
if (pGC->capStyle != CapNotLast)
|
|
y1--;
|
|
#endif
|
|
}
|
|
#ifdef POLYSEGMENT
|
|
else if (pGC->capStyle != CapNotLast)
|
|
y2++;
|
|
#endif
|
|
/* get to first band that might contain part of line */
|
|
while ((nbox) && (pbox->y2 <= y1)) {
|
|
pbox++;
|
|
nbox--;
|
|
}
|
|
|
|
if (nbox) {
|
|
/* stop when lower edge of box is beyond end of line */
|
|
while((nbox) && (y2 >= pbox->y1)) {
|
|
if ((x1 >= pbox->x1) && (x1 < pbox->x2)) {
|
|
int y1t, y2t;
|
|
/* this box has part of the line in it */
|
|
y1t = max(y1, pbox->y1);
|
|
y2t = min(y2, pbox->y2);
|
|
if (y1t != y2t)
|
|
afbVertS(addrlBase, nlwidth, sizeDst, depthDst, x1, y1t,
|
|
y2t-y1t, rrops); /* @@@ NEXT PLANE PASSED @@@ */
|
|
}
|
|
nbox--;
|
|
pbox++;
|
|
}
|
|
}
|
|
#ifndef POLYSEGMENT
|
|
y2 = ppt->y + yorg;
|
|
#endif
|
|
} else if (y1 == y2) /* horizontal line */ {
|
|
/* force line from left to right, keeping
|
|
endpoint semantics
|
|
*/
|
|
if (x1 > x2) {
|
|
register int tmp;
|
|
|
|
tmp = x2;
|
|
x2 = x1 + 1;
|
|
x1 = tmp + 1;
|
|
#ifdef POLYSEGMENT
|
|
if (pGC->capStyle != CapNotLast)
|
|
x1--;
|
|
#endif
|
|
}
|
|
#ifdef POLYSEGMENT
|
|
else if (pGC->capStyle != CapNotLast)
|
|
x2++;
|
|
#endif
|
|
|
|
/* find the correct band */
|
|
while( (nbox) && (pbox->y2 <= y1)) {
|
|
pbox++;
|
|
nbox--;
|
|
}
|
|
|
|
/* try to draw the line, if we haven't gone beyond it */
|
|
if ((nbox) && (pbox->y1 <= y1)) {
|
|
int tmp;
|
|
|
|
/* when we leave this band, we're done */
|
|
tmp = pbox->y1;
|
|
while((nbox) && (pbox->y1 == tmp)) {
|
|
int x1t, x2t;
|
|
|
|
if (pbox->x2 <= x1) {
|
|
/* skip boxes until one might contain start point */
|
|
nbox--;
|
|
pbox++;
|
|
continue;
|
|
}
|
|
|
|
/* stop if left of box is beyond right of line */
|
|
if (pbox->x1 >= x2) {
|
|
nbox = 0;
|
|
break;
|
|
}
|
|
|
|
x1t = max(x1, pbox->x1);
|
|
x2t = min(x2, pbox->x2);
|
|
if (x1t != x2t)
|
|
afbHorzS(addrlBase, nlwidth, sizeDst, depthDst, x1t, y1,
|
|
x2t-x1t, rrops); /* @@@ NEXT PLANE PASSED @@@ */
|
|
nbox--;
|
|
pbox++;
|
|
}
|
|
}
|
|
#ifndef POLYSEGMENT
|
|
x2 = ppt->x + xorg;
|
|
#endif
|
|
}
|
|
else /* sloped line */
|
|
{
|
|
CalcLineDeltas(x1, y1, x2, y2, adx, ady,
|
|
signdx, signdy, 1, 1, octant);
|
|
|
|
if (adx > ady) {
|
|
axis = X_AXIS;
|
|
e1 = ady << 1;
|
|
e2 = e1 - (adx << 1);
|
|
e = e1 - adx;
|
|
} else {
|
|
axis = Y_AXIS;
|
|
e1 = adx << 1;
|
|
e2 = e1 - (ady << 1);
|
|
e = e1 - ady;
|
|
SetYMajorOctant(octant);
|
|
}
|
|
|
|
FIXUP_ERROR(e, octant, bias);
|
|
|
|
/* we have bresenham parameters and two points.
|
|
all we have to do now is clip and draw.
|
|
*/
|
|
|
|
while(nbox--) {
|
|
oc1 = 0;
|
|
oc2 = 0;
|
|
OUTCODES(oc1, x1, y1, pbox);
|
|
OUTCODES(oc2, x2, y2, pbox);
|
|
if ((oc1 | oc2) == 0) {
|
|
if (axis == X_AXIS)
|
|
len = adx;
|
|
else
|
|
len = ady;
|
|
#ifdef POLYSEGMENT
|
|
if (pGC->capStyle != CapNotLast)
|
|
len++;
|
|
#endif
|
|
afbBresS(addrlBase, nlwidth, sizeDst, depthDst, signdx, signdy,
|
|
axis, x1, y1, e, e1, e2, len, rrops); /* @@@ NEXT PLANE PASSED @@@ */
|
|
break;
|
|
} else if (oc1 & oc2) {
|
|
pbox++;
|
|
} else {
|
|
int new_x1 = x1, new_y1 = y1, new_x2 = x2, new_y2 = y2;
|
|
int clip1 = 0, clip2 = 0;
|
|
int clipdx, clipdy;
|
|
int err;
|
|
|
|
if (miZeroClipLine(pbox->x1, pbox->y1, pbox->x2-1,
|
|
pbox->y2-1,
|
|
&new_x1, &new_y1, &new_x2, &new_y2,
|
|
adx, ady, &clip1, &clip2,
|
|
octant, bias, oc1, oc2) == -1) {
|
|
pbox++;
|
|
continue;
|
|
}
|
|
|
|
if (axis == X_AXIS)
|
|
len = abs(new_x2 - new_x1);
|
|
else
|
|
len = abs(new_y2 - new_y1);
|
|
#ifdef POLYSEGMENT
|
|
if (clip2 != 0 || pGC->capStyle != CapNotLast)
|
|
len++;
|
|
#else
|
|
len += (clip2 != 0);
|
|
#endif
|
|
if (len) {
|
|
/* unwind bresenham error term to first point */
|
|
if (clip1) {
|
|
clipdx = abs(new_x1 - x1);
|
|
clipdy = abs(new_y1 - y1);
|
|
if (axis == X_AXIS)
|
|
err = e+((clipdy*e2) + ((clipdx-clipdy)*e1));
|
|
else
|
|
err = e+((clipdx*e2) + ((clipdy-clipdx)*e1));
|
|
}
|
|
else
|
|
err = e;
|
|
afbBresS(addrlBase, nlwidth, sizeDst, depthDst, signdx,
|
|
signdy, axis, new_x1, new_y1, err, e1, e2, len,
|
|
rrops); /* @@@ NEXT PLANE PASSED @@@ */
|
|
}
|
|
pbox++;
|
|
}
|
|
} /* while (nbox--) */
|
|
} /* sloped line */
|
|
} /* while (nline--) */
|
|
|
|
#ifndef POLYSEGMENT
|
|
|
|
/* paint the last point if the end style isn't CapNotLast.
|
|
(Assume that a projecting, butt, or round cap that is one
|
|
pixel wide is the same as the single pixel of the endpoint.)
|
|
*/
|
|
|
|
if ((pGC->capStyle != CapNotLast) &&
|
|
((ppt->x + xorg != pptInit->x + pDrawable->x) ||
|
|
(ppt->y + yorg != pptInit->y + pDrawable->y) ||
|
|
(ppt == pptInit + 1))) {
|
|
nbox = nboxInit;
|
|
pbox = pboxInit;
|
|
while (nbox--) {
|
|
if ((x2 >= pbox->x1) && (y2 >= pbox->y1) && (x2 < pbox->x2) &&
|
|
(y2 < pbox->y2)) {
|
|
for (d = 0; d < depthDst; d++) {
|
|
addrl = afbScanline(addrlBase, x2, y2, nlwidth);
|
|
addrlBase += sizeDst; /* @@@ NEXT PLANE @@@ */
|
|
|
|
switch(rrops[d]) {
|
|
case RROP_BLACK:
|
|
*addrl &= mfbGetrmask(x2 & PIM);
|
|
break;
|
|
case RROP_WHITE:
|
|
*addrl |= mfbGetmask(x2 & PIM);
|
|
break;
|
|
case RROP_INVERT:
|
|
*addrl ^= mfbGetmask(x2 & PIM);
|
|
break;
|
|
case RROP_NOP:
|
|
break;
|
|
} /* switch */
|
|
} /* for (d = ...) */
|
|
break;
|
|
} else
|
|
pbox++;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Draw dashed 1-pixel lines.
|
|
*/
|
|
|
|
void
|
|
#ifdef POLYSEGMENT
|
|
afbSegmentSD(pDrawable, pGC, nseg, pSeg)
|
|
DrawablePtr pDrawable;
|
|
register GCPtr pGC;
|
|
int nseg;
|
|
register xSegment *pSeg;
|
|
#else
|
|
afbLineSD(pDrawable, pGC, mode, npt, pptInit)
|
|
DrawablePtr pDrawable;
|
|
register GCPtr pGC;
|
|
int mode; /* Origin or Previous */
|
|
int npt; /* number of points */
|
|
DDXPointPtr pptInit;
|
|
#endif
|
|
{
|
|
int nboxInit;
|
|
register int nbox;
|
|
BoxPtr pboxInit;
|
|
register BoxPtr pbox;
|
|
#ifndef POLYSEGMENT
|
|
register DDXPointPtr ppt; /* pointer to list of translated points */
|
|
#endif
|
|
|
|
register unsigned int oc1; /* outcode of point 1 */
|
|
register unsigned int oc2; /* outcode of point 2 */
|
|
|
|
PixelType *addrlBase; /* address of destination pixmap */
|
|
int nlwidth; /* width in longwords of destination pixmap */
|
|
int sizeDst;
|
|
int depthDst;
|
|
int xorg, yorg; /* origin of window */
|
|
|
|
int adx; /* abs values of dx and dy */
|
|
int ady;
|
|
int signdx; /* sign of dx and dy */
|
|
int signdy;
|
|
int e, e1, e2; /* bresenham error and increments */
|
|
int len; /* length of segment */
|
|
int axis; /* major axis */
|
|
int octant;
|
|
unsigned int bias = miGetZeroLineBias(pDrawable->pScreen);
|
|
int x1, x2, y1, y2;
|
|
RegionPtr cclip;
|
|
unsigned char *rrops;
|
|
unsigned char bgrrops[AFB_MAX_DEPTH];
|
|
unsigned char *pDash;
|
|
int dashOffset;
|
|
int numInDashList;
|
|
int dashIndex;
|
|
int isDoubleDash;
|
|
int dashIndexTmp, dashOffsetTmp;
|
|
int unclippedlen;
|
|
#ifndef POLYSEGMENT
|
|
PixelType *addrl;
|
|
int d;
|
|
#endif
|
|
|
|
cclip = pGC->pCompositeClip;
|
|
rrops = ((afbPrivGC *)dixLookupPrivate(&pGC->devPrivates,
|
|
afbGCPrivateKey))->rrops;
|
|
pboxInit = REGION_RECTS(cclip);
|
|
nboxInit = REGION_NUM_RECTS(cclip);
|
|
|
|
afbGetPixelWidthSizeDepthAndPointer(pDrawable, nlwidth, sizeDst, depthDst,
|
|
addrlBase);
|
|
|
|
/* compute initial dash values */
|
|
|
|
pDash = (unsigned char *) pGC->dash;
|
|
numInDashList = pGC->numInDashList;
|
|
isDoubleDash = (pGC->lineStyle == LineDoubleDash);
|
|
dashIndex = 0;
|
|
dashOffset = 0;
|
|
miStepDash ((int)pGC->dashOffset, &dashIndex, pDash,
|
|
numInDashList, &dashOffset);
|
|
|
|
if (isDoubleDash)
|
|
afbReduceRop (pGC->alu, pGC->bgPixel, pGC->planemask, pGC->depth,
|
|
bgrrops);
|
|
|
|
xorg = pDrawable->x;
|
|
yorg = pDrawable->y;
|
|
#ifdef POLYSEGMENT
|
|
while (nseg--)
|
|
#else
|
|
ppt = pptInit;
|
|
x2 = ppt->x + xorg;
|
|
y2 = ppt->y + yorg;
|
|
while(--npt)
|
|
#endif
|
|
{
|
|
nbox = nboxInit;
|
|
pbox = pboxInit;
|
|
|
|
#ifdef POLYSEGMENT
|
|
x1 = pSeg->x1 + xorg;
|
|
y1 = pSeg->y1 + yorg;
|
|
x2 = pSeg->x2 + xorg;
|
|
y2 = pSeg->y2 + yorg;
|
|
pSeg++;
|
|
#else
|
|
x1 = x2;
|
|
y1 = y2;
|
|
++ppt;
|
|
if (mode == CoordModePrevious) {
|
|
xorg = x1;
|
|
yorg = y1;
|
|
}
|
|
x2 = ppt->x + xorg;
|
|
y2 = ppt->y + yorg;
|
|
#endif
|
|
|
|
CalcLineDeltas(x1, y1, x2, y2, adx, ady, signdx, signdy,
|
|
1, 1, octant);
|
|
|
|
if (adx > ady) {
|
|
axis = X_AXIS;
|
|
e1 = ady << 1;
|
|
e2 = e1 - (adx << 1);
|
|
e = e1 - adx;
|
|
unclippedlen = adx;
|
|
} else {
|
|
axis = Y_AXIS;
|
|
e1 = adx << 1;
|
|
e2 = e1 - (ady << 1);
|
|
e = e1 - ady;
|
|
unclippedlen = ady;
|
|
SetYMajorOctant(octant);
|
|
}
|
|
|
|
FIXUP_ERROR(e, octant, bias);
|
|
|
|
/* we have bresenham parameters and two points.
|
|
all we have to do now is clip and draw.
|
|
*/
|
|
|
|
while(nbox--) {
|
|
oc1 = 0;
|
|
oc2 = 0;
|
|
OUTCODES(oc1, x1, y1, pbox);
|
|
OUTCODES(oc2, x2, y2, pbox);
|
|
if ((oc1 | oc2) == 0) {
|
|
#ifdef POLYSEGMENT
|
|
if (pGC->capStyle != CapNotLast)
|
|
unclippedlen++;
|
|
dashIndexTmp = dashIndex;
|
|
dashOffsetTmp = dashOffset;
|
|
afbBresD(&dashIndexTmp, pDash, numInDashList, &dashOffsetTmp,
|
|
isDoubleDash, addrlBase, nlwidth, sizeDst, depthDst,
|
|
signdx, signdy, axis, x1, y1, e, e1, e2, unclippedlen,
|
|
rrops, bgrrops); /* @@@ NEXT PLANE PASSED @@@ */
|
|
break;
|
|
#else
|
|
afbBresD(&dashIndex, pDash, numInDashList, &dashOffset,
|
|
isDoubleDash, addrlBase, nlwidth, sizeDst, depthDst,
|
|
signdx, signdy, axis, x1, y1, e, e1, e2, unclippedlen,
|
|
rrops, bgrrops); /* @@@ NEXT PLANE PASSED @@@ */
|
|
goto dontStep;
|
|
#endif
|
|
} else if (oc1 & oc2) {
|
|
pbox++;
|
|
} else /* have to clip */ {
|
|
int new_x1 = x1, new_y1 = y1, new_x2 = x2, new_y2 = y2;
|
|
int clip1 = 0, clip2 = 0;
|
|
int clipdx, clipdy;
|
|
int err;
|
|
|
|
if (miZeroClipLine(pbox->x1, pbox->y1, pbox->x2-1, pbox->y2-1,
|
|
&new_x1, &new_y1, &new_x2, &new_y2,
|
|
adx, ady, &clip1, &clip2,
|
|
octant, bias, oc1, oc2) == -1) {
|
|
pbox++;
|
|
continue;
|
|
}
|
|
dashIndexTmp = dashIndex;
|
|
dashOffsetTmp = dashOffset;
|
|
if (clip1) {
|
|
int dlen;
|
|
|
|
if (axis == X_AXIS)
|
|
dlen = abs(new_x1 - x1);
|
|
else
|
|
dlen = abs(new_y1 - y1);
|
|
miStepDash (dlen, &dashIndexTmp, pDash,
|
|
numInDashList, &dashOffsetTmp);
|
|
}
|
|
if (axis == X_AXIS)
|
|
len = abs(new_x2 - new_x1);
|
|
else
|
|
len = abs(new_y2 - new_y1);
|
|
#ifdef POLYSEGMENT
|
|
if (clip2 != 0 || pGC->capStyle != CapNotLast)
|
|
len++;
|
|
#else
|
|
len += (clip2 != 0);
|
|
#endif
|
|
if (len) {
|
|
/* unwind bresenham error term to first point */
|
|
if (clip1) {
|
|
clipdx = abs(new_x1 - x1);
|
|
clipdy = abs(new_y1 - y1);
|
|
if (axis == X_AXIS)
|
|
err = e+((clipdy*e2) + ((clipdx-clipdy)*e1));
|
|
else
|
|
err = e+((clipdx*e2) + ((clipdy-clipdx)*e1));
|
|
}
|
|
else
|
|
err = e;
|
|
afbBresD(&dashIndexTmp, pDash, numInDashList, &dashOffsetTmp,
|
|
isDoubleDash, addrlBase, nlwidth, sizeDst, depthDst,
|
|
signdx, signdy, axis, new_x1, new_y1, err, e1, e2,
|
|
len, rrops, bgrrops); /* @@@ NEXT PLANE PASSED @@@ */
|
|
}
|
|
pbox++;
|
|
}
|
|
} /* while (nbox--) */
|
|
#ifndef POLYSEGMENT
|
|
/*
|
|
* walk the dash list around to the next line
|
|
*/
|
|
miStepDash (unclippedlen, &dashIndex, pDash,
|
|
numInDashList, &dashOffset);
|
|
dontStep: ;
|
|
#endif
|
|
} /* while (nline--) */
|
|
|
|
#ifndef POLYSEGMENT
|
|
/* paint the last point if the end style isn't CapNotLast.
|
|
(Assume that a projecting, butt, or round cap that is one
|
|
pixel wide is the same as the single pixel of the endpoint.)
|
|
*/
|
|
|
|
if ((pGC->capStyle != CapNotLast) &&
|
|
((dashIndex & 1) == 0 || isDoubleDash) &&
|
|
((ppt->x + xorg != pptInit->x + pDrawable->x) ||
|
|
(ppt->y + yorg != pptInit->y + pDrawable->y) ||
|
|
(ppt == pptInit + 1))) {
|
|
nbox = nboxInit;
|
|
pbox = pboxInit;
|
|
while (nbox--) {
|
|
if ((x2 >= pbox->x1) && (y2 >= pbox->y1) && (x2 < pbox->x2) &&
|
|
(y2 < pbox->y2)) {
|
|
int rop;
|
|
|
|
for (d = 0; d < depthDst; d++) {
|
|
addrl = afbScanline(addrlBase, x2, y2, nlwidth);
|
|
addrlBase += sizeDst; /* @@@ NEXT PLANE @@@ */
|
|
|
|
rop = rrops[d];
|
|
if (dashIndex & 1)
|
|
rop = bgrrops[d];
|
|
|
|
switch (rop) {
|
|
case RROP_BLACK:
|
|
*addrl &= mfbGetrmask(x2 & PIM);
|
|
break;
|
|
case RROP_WHITE:
|
|
*addrl |= mfbGetmask(x2 & PIM);
|
|
break;
|
|
|
|
case RROP_INVERT:
|
|
*addrl ^= mfbGetmask(x2 & PIM);
|
|
break;
|
|
|
|
case RROP_NOP:
|
|
break;
|
|
}
|
|
} /* for (d = ...) */
|
|
break;
|
|
} else
|
|
pbox++;
|
|
}
|
|
}
|
|
#endif
|
|
}
|