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miwideline.c
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/* $Xorg: miwideline.c,v 1.4 2001/02/09 02:05:22 xorgcvs Exp $ */
/*
Copyright 1988, 1998 The Open Group
Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.
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 OPEN GROUP 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 Open Group 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 Open Group.
*/
/* Author: Keith Packard, MIT X Consortium */
/*
* Mostly integer wideline code. Uses a technique similar to
* bresenham zero-width lines, except walks an X edge
*/
#include <stdio.h>
#ifdef _XOPEN_SOURCE
#include <math.h>
#else
#define _XOPEN_SOURCE /* to get prototype for hypot on some systems */
#include <math.h>
#undef _XOPEN_SOURCE
#endif
#include "X.h"
#include "windowstr.h"
#include "gcstruct.h"
#include "miscstruct.h"
#include "miwideline.h"
#include "mi.h"
#ifdef ICEILTEMPDECL
ICEILTEMPDECL
#endif
static void miLineArc();
/*
* spans-based polygon filler
*/
void
miFillPolyHelper (pDrawable, pGC, pixel, spanData, y, overall_height,
left, right, left_count, right_count)
DrawablePtr pDrawable;
GCPtr pGC;
unsigned long pixel;
SpanDataPtr spanData;
int y; /* start y coordinate */
int overall_height; /* height of entire segment */
PolyEdgePtr left, right;
int left_count, right_count;
{
register int left_x, left_e;
int left_stepx;
int left_signdx;
int left_dy, left_dx;
register int right_x, right_e;
int right_stepx;
int right_signdx;
int right_dy, right_dx;
int height;
int left_height, right_height;
register DDXPointPtr ppt;
DDXPointPtr pptInit;
register int *pwidth;
int *pwidthInit;
XID oldPixel;
int xorg;
Spans spanRec;
left_height = 0;
right_height = 0;
if (!spanData)
{
pptInit = (DDXPointPtr) ALLOCATE_LOCAL (overall_height * sizeof(*ppt));
if (!pptInit)
return;
pwidthInit = (int *) ALLOCATE_LOCAL (overall_height * sizeof(*pwidth));
if (!pwidthInit)
{
DEALLOCATE_LOCAL (pptInit);
return;
}
ppt = pptInit;
pwidth = pwidthInit;
oldPixel = pGC->fgPixel;
if (pixel != oldPixel)
{
DoChangeGC (pGC, GCForeground, (XID *)&pixel, FALSE);
ValidateGC (pDrawable, pGC);
}
}
else
{
spanRec.points = (DDXPointPtr) xalloc (overall_height * sizeof (*ppt));
if (!spanRec.points)
return;
spanRec.widths = (int *) xalloc (overall_height * sizeof (int));
if (!spanRec.widths)
{
xfree (spanRec.points);
return;
}
ppt = spanRec.points;
pwidth = spanRec.widths;
}
xorg = 0;
if (pGC->miTranslate)
{
y += pDrawable->y;
xorg = pDrawable->x;
}
while ((left_count || left_height) &&
(right_count || right_height))
{
MIPOLYRELOADLEFT
MIPOLYRELOADRIGHT
height = left_height;
if (height > right_height)
height = right_height;
left_height -= height;
right_height -= height;
while (--height >= 0)
{
if (right_x >= left_x)
{
ppt->y = y;
ppt->x = left_x + xorg;
ppt++;
*pwidth++ = right_x - left_x + 1;
}
y++;
MIPOLYSTEPLEFT
MIPOLYSTEPRIGHT
}
}
if (!spanData)
{
(*pGC->ops->FillSpans) (pDrawable, pGC, ppt - pptInit, pptInit, pwidthInit, TRUE);
DEALLOCATE_LOCAL (pwidthInit);
DEALLOCATE_LOCAL (pptInit);
if (pixel != oldPixel)
{
DoChangeGC (pGC, GCForeground, &oldPixel, FALSE);
ValidateGC (pDrawable, pGC);
}
}
else
{
spanRec.count = ppt - spanRec.points;
AppendSpanGroup (pGC, pixel, &spanRec, spanData)
}
}
static void
miFillRectPolyHelper (pDrawable, pGC, pixel, spanData, x, y, w, h)
DrawablePtr pDrawable;
GCPtr pGC;
unsigned long pixel;
SpanDataPtr spanData;
int x, y, w, h;
{
register DDXPointPtr ppt;
register int *pwidth;
XID oldPixel;
Spans spanRec;
xRectangle rect;
if (!spanData)
{
rect.x = x;
rect.y = y;
rect.width = w;
rect.height = h;
oldPixel = pGC->fgPixel;
if (pixel != oldPixel)
{
DoChangeGC (pGC, GCForeground, (XID *)&pixel, FALSE);
ValidateGC (pDrawable, pGC);
}
(*pGC->ops->PolyFillRect) (pDrawable, pGC, 1, &rect);
if (pixel != oldPixel)
{
DoChangeGC (pGC, GCForeground, &oldPixel, FALSE);
ValidateGC (pDrawable, pGC);
}
}
else
{
spanRec.points = (DDXPointPtr) xalloc (h * sizeof (*ppt));
if (!spanRec.points)
return;
spanRec.widths = (int *) xalloc (h * sizeof (int));
if (!spanRec.widths)
{
xfree (spanRec.points);
return;
}
ppt = spanRec.points;
pwidth = spanRec.widths;
if (pGC->miTranslate)
{
y += pDrawable->y;
x += pDrawable->x;
}
while (h--)
{
ppt->x = x;
ppt->y = y;
ppt++;
*pwidth++ = w;
y++;
}
spanRec.count = ppt - spanRec.points;
AppendSpanGroup (pGC, pixel, &spanRec, spanData)
}
}
/* static */ int
miPolyBuildEdge (x0, y0, k, dx, dy, xi, yi, left, edge)
double x0, y0;
double k; /* x0 * dy - y0 * dx */
register int dx, dy;
int xi, yi;
int left;
register PolyEdgePtr edge;
{
int x, y, e;
int xady;
if (dy < 0)
{
dy = -dy;
dx = -dx;
k = -k;
}
#ifdef NOTDEF
{
double realk, kerror;
realk = x0 * dy - y0 * dx;
kerror = Fabs (realk - k);
if (kerror > .1)
printf ("realk: %g k: %g\n", realk, k);
}
#endif
y = ICEIL (y0);
xady = ICEIL (k) + y * dx;
if (xady <= 0)
x = - (-xady / dy) - 1;
else
x = (xady - 1) / dy;
e = xady - x * dy;
if (dx >= 0)
{
edge->signdx = 1;
edge->stepx = dx / dy;
edge->dx = dx % dy;
}
else
{
edge->signdx = -1;
edge->stepx = - (-dx / dy);
edge->dx = -dx % dy;
e = dy - e + 1;
}
edge->dy = dy;
edge->x = x + left + xi;
edge->e = e - dy; /* bias to compare against 0 instead of dy */
return y + yi;
}
#define StepAround(v, incr, max) (((v) + (incr) < 0) ? (max - 1) : ((v) + (incr) == max) ? 0 : ((v) + (incr)))
/* static */ int
miPolyBuildPoly (vertices, slopes, count, xi, yi, left, right, pnleft, pnright, h)
register PolyVertexPtr vertices;
register PolySlopePtr slopes;
int count;
int xi, yi;
PolyEdgePtr left, right;
int *pnleft, *pnright;
int *h;
{
int top, bottom;
double miny, maxy;
register int i;
int j;
int clockwise;
int slopeoff;
register int s;
register int nright, nleft;
int y, lasty, bottomy, topy;
/* find the top of the polygon */
maxy = miny = vertices[0].y;
bottom = top = 0;
for (i = 1; i < count; i++)
{
if (vertices[i].y < miny)
{
top = i;
miny = vertices[i].y;
}
if (vertices[i].y >= maxy)
{
bottom = i;
maxy = vertices[i].y;
}
}
clockwise = 1;
slopeoff = 0;
i = top;
j = StepAround (top, -1, count);
if (slopes[j].dy * slopes[i].dx > slopes[i].dy * slopes[j].dx)
{
clockwise = -1;
slopeoff = -1;
}
bottomy = ICEIL (maxy) + yi;
nright = 0;
s = StepAround (top, slopeoff, count);
i = top;
while (i != bottom)
{
if (slopes[s].dy != 0)
{
y = miPolyBuildEdge (vertices[i].x, vertices[i].y,
slopes[s].k,
slopes[s].dx, slopes[s].dy,
xi, yi, 0,
&right[nright]);
if (nright != 0)
right[nright-1].height = y - lasty;
else
topy = y;
nright++;
lasty = y;
}
i = StepAround (i, clockwise, count);
s = StepAround (s, clockwise, count);
}
if (nright != 0)
right[nright-1].height = bottomy - lasty;
if (slopeoff == 0)
slopeoff = -1;
else
slopeoff = 0;
nleft = 0;
s = StepAround (top, slopeoff, count);
i = top;
while (i != bottom)
{
if (slopes[s].dy != 0)
{
y = miPolyBuildEdge (vertices[i].x, vertices[i].y,
slopes[s].k,
slopes[s].dx, slopes[s].dy, xi, yi, 1,
&left[nleft]);
if (nleft != 0)
left[nleft-1].height = y - lasty;
nleft++;
lasty = y;
}
i = StepAround (i, -clockwise, count);
s = StepAround (s, -clockwise, count);
}
if (nleft != 0)
left[nleft-1].height = bottomy - lasty;
*pnleft = nleft;
*pnright = nright;
*h = bottomy - topy;
return topy;
}
static void
miLineOnePoint (pDrawable, pGC, pixel, spanData, x, y)
DrawablePtr pDrawable;
GCPtr pGC;
unsigned long pixel;
SpanDataPtr spanData;
int x, y;
{
DDXPointRec pt;
int wid;
unsigned long oldPixel;
MILINESETPIXEL (pDrawable, pGC, pixel, oldPixel);
if (pGC->fillStyle == FillSolid)
{
pt.x = x;
pt.y = y;
(*pGC->ops->PolyPoint) (pDrawable, pGC, CoordModeOrigin, 1, &pt);
}
else
{
wid = 1;
if (pGC->miTranslate)
{
x += pDrawable->x;
y += pDrawable->y;
}
pt.x = x;
pt.y = y;
(*pGC->ops->FillSpans) (pDrawable, pGC, 1, &pt, &wid, TRUE);
}
MILINERESETPIXEL (pDrawable, pGC, pixel, oldPixel);
}
static void
miLineJoin (pDrawable, pGC, pixel, spanData, pLeft, pRight)
DrawablePtr pDrawable;
GCPtr pGC;
unsigned long pixel;
SpanDataPtr spanData;
register LineFacePtr pLeft, pRight;
{
double mx, my;
double denom;
PolyVertexRec vertices[4];
PolySlopeRec slopes[4];
int edgecount;
PolyEdgeRec left[4], right[4];
int nleft, nright;
int y, height;
int swapslopes;
int joinStyle = pGC->joinStyle;
int lw = pGC->lineWidth;
if (lw == 1 && !spanData) {
/* Lines going in the same direction have no join */
if (pLeft->dx >= 0 == pRight->dx <= 0)
return;
if (joinStyle != JoinRound) {
denom = - pLeft->dx * (double)pRight->dy + pRight->dx * (double)pLeft->dy;
if (denom == 0)
return; /* no join to draw */
}
if (joinStyle != JoinMiter) {
miLineOnePoint (pDrawable, pGC, pixel, spanData, pLeft->x, pLeft->y);
return;
}
} else {
if (joinStyle == JoinRound)
{
miLineArc(pDrawable, pGC, pixel, spanData,
pLeft, pRight,
(double)0.0, (double)0.0, TRUE);
return;
}
denom = - pLeft->dx * (double)pRight->dy + pRight->dx * (double)pLeft->dy;
if (denom == 0.0)
return; /* no join to draw */
}
swapslopes = 0;
if (denom > 0)
{
pLeft->xa = -pLeft->xa;
pLeft->ya = -pLeft->ya;
pLeft->dx = -pLeft->dx;
pLeft->dy = -pLeft->dy;
}
else
{
swapslopes = 1;
pRight->xa = -pRight->xa;
pRight->ya = -pRight->ya;
pRight->dx = -pRight->dx;
pRight->dy = -pRight->dy;
}
vertices[0].x = pRight->xa;
vertices[0].y = pRight->ya;
slopes[0].dx = -pRight->dy;
slopes[0].dy = pRight->dx;
slopes[0].k = 0;
vertices[1].x = 0;
vertices[1].y = 0;
slopes[1].dx = pLeft->dy;
slopes[1].dy = -pLeft->dx;
slopes[1].k = 0;
vertices[2].x = pLeft->xa;
vertices[2].y = pLeft->ya;
if (joinStyle == JoinMiter)
{
my = (pLeft->dy * (pRight->xa * pRight->dy - pRight->ya * pRight->dx) -
pRight->dy * (pLeft->xa * pLeft->dy - pLeft->ya * pLeft->dx )) /
denom;
if (pLeft->dy != 0)
{
mx = pLeft->xa + (my - pLeft->ya) *
(double) pLeft->dx / (double) pLeft->dy;
}
else
{
mx = pRight->xa + (my - pRight->ya) *
(double) pRight->dx / (double) pRight->dy;
}
/* check miter limit */
if ((mx * mx + my * my) * 4 > SQSECANT * lw * lw)
joinStyle = JoinBevel;
}
if (joinStyle == JoinMiter)
{
slopes[2].dx = pLeft->dx;
slopes[2].dy = pLeft->dy;
slopes[2].k = pLeft->k;
if (swapslopes)
{
slopes[2].dx = -slopes[2].dx;
slopes[2].dy = -slopes[2].dy;
slopes[2].k = -slopes[2].k;
}
vertices[3].x = mx;
vertices[3].y = my;
slopes[3].dx = pRight->dx;
slopes[3].dy = pRight->dy;
slopes[3].k = pRight->k;
if (swapslopes)
{
slopes[3].dx = -slopes[3].dx;
slopes[3].dy = -slopes[3].dy;
slopes[3].k = -slopes[3].k;
}
edgecount = 4;
}
else
{
double scale, dx, dy, adx, ady;
adx = dx = pRight->xa - pLeft->xa;
ady = dy = pRight->ya - pLeft->ya;
if (adx < 0)
adx = -adx;
if (ady < 0)
ady = -ady;
scale = ady;
if (adx > ady)
scale = adx;
slopes[2].dx = (dx * 65536) / scale;
slopes[2].dy = (dy * 65536) / scale;
slopes[2].k = ((pLeft->xa + pRight->xa) * slopes[2].dy -
(pLeft->ya + pRight->ya) * slopes[2].dx) / 2.0;
edgecount = 3;
}
y = miPolyBuildPoly (vertices, slopes, edgecount, pLeft->x, pLeft->y,
left, right, &nleft, &nright, &height);
miFillPolyHelper (pDrawable, pGC, pixel, spanData, y, height, left, right, nleft, nright);
}
static int
miLineArcI (pDraw, pGC, xorg, yorg, points, widths)
DrawablePtr pDraw;
GCPtr pGC;
int xorg, yorg;
DDXPointPtr points;
int *widths;
{
register DDXPointPtr tpts, bpts;
register int *twids, *bwids;
register int x, y, e, ex, slw;
tpts = points;
twids = widths;
if (pGC->miTranslate)
{
xorg += pDraw->x;
yorg += pDraw->y;
}
slw = pGC->lineWidth;
if (slw == 1)
{
tpts->x = xorg;
tpts->y = yorg;
*twids = 1;
return 1;
}
bpts = tpts + slw;
bwids = twids + slw;
y = (slw >> 1) + 1;
if (slw & 1)
e = - ((y << 2) + 3);
else
e = - (y << 3);
ex = -4;
x = 0;
while (y)
{
e += (y << 3) - 4;
while (e >= 0)
{
x++;
e += (ex = -((x << 3) + 4));
}
y--;
slw = (x << 1) + 1;
if ((e == ex) && (slw > 1))
slw--;
tpts->x = xorg - x;
tpts->y = yorg - y;
tpts++;
*twids++ = slw;
if ((y != 0) && ((slw > 1) || (e != ex)))
{
bpts--;
bpts->x = xorg - x;
bpts->y = yorg + y;
*--bwids = slw;
}
}
return (pGC->lineWidth);
}
#define CLIPSTEPEDGE(edgey,edge,edgeleft) \
if (ybase == edgey) \
{ \
if (edgeleft) \
{ \
if (edge->x > xcl) \
xcl = edge->x; \
} \
else \
{ \
if (edge->x < xcr) \
xcr = edge->x; \
} \
edgey++; \
edge->x += edge->stepx; \
edge->e += edge->dx; \
if (edge->e > 0) \
{ \
edge->x += edge->signdx; \
edge->e -= edge->dy; \
} \
}
static int
miLineArcD (pDraw, pGC, xorg, yorg, points, widths,
edge1, edgey1, edgeleft1, edge2, edgey2, edgeleft2)
DrawablePtr pDraw;
GCPtr pGC;
double xorg, yorg;
DDXPointPtr points;
int *widths;
PolyEdgePtr edge1, edge2;
int edgey1, edgey2;
Bool edgeleft1, edgeleft2;
{
register DDXPointPtr pts;
register int *wids;
double radius, x0, y0, el, er, yk, xlk, xrk, k;
int xbase, ybase, y, boty, xl, xr, xcl, xcr;
int ymin, ymax;
Bool edge1IsMin, edge2IsMin;
int ymin1, ymin2;
pts = points;
wids = widths;
xbase = floor(xorg);
x0 = xorg - xbase;
ybase = ICEIL (yorg);
y0 = yorg - ybase;
if (pGC->miTranslate)
{
xbase += pDraw->x;
ybase += pDraw->y;
edge1->x += pDraw->x;
edge2->x += pDraw->x;
edgey1 += pDraw->y;
edgey2 += pDraw->y;
}
xlk = x0 + x0 + 1.0;
xrk = x0 + x0 - 1.0;
yk = y0 + y0 - 1.0;
radius = ((double)pGC->lineWidth) / 2.0;
y = floor(radius - y0 + 1.0);
ybase -= y;
ymin = ybase;
ymax = 65536;
edge1IsMin = FALSE;
ymin1 = edgey1;
if (edge1->dy >= 0)
{
if (!edge1->dy)
{
if (edgeleft1)
edge1IsMin = TRUE;
else
ymax = edgey1;
edgey1 = 65536;
}
else
{
if ((edge1->signdx < 0) == edgeleft1)
edge1IsMin = TRUE;
}
}
edge2IsMin = FALSE;
ymin2 = edgey2;
if (edge2->dy >= 0)
{
if (!edge2->dy)
{
if (edgeleft2)
edge2IsMin = TRUE;
else
ymax = edgey2;
edgey2 = 65536;
}
else
{
if ((edge2->signdx < 0) == edgeleft2)
edge2IsMin = TRUE;
}
}
if (edge1IsMin)
{
ymin = ymin1;
if (edge2IsMin && ymin1 > ymin2)
ymin = ymin2;
} else if (edge2IsMin)
ymin = ymin2;
el = radius * radius - ((y + y0) * (y + y0)) - (x0 * x0);
er = el + xrk;
xl = 1;
xr = 0;
if (x0 < 0.5)
{
xl = 0;
el -= xlk;
}
boty = (y0 < -0.5) ? 1 : 0;
if (ybase + y - boty > ymax)
boty = ymax - ybase - y;
while (y > boty)
{
k = (y << 1) + yk;
er += k;
while (er > 0.0)
{
xr++;
er += xrk - (xr << 1);
}
el += k;
while (el >= 0.0)
{
xl--;
el += (xl << 1) - xlk;
}
y--;
ybase++;
if (ybase < ymin)
continue;
xcl = xl + xbase;
xcr = xr + xbase;
CLIPSTEPEDGE(edgey1, edge1, edgeleft1);
CLIPSTEPEDGE(edgey2, edge2, edgeleft2);
if (xcr >= xcl)
{
pts->x = xcl;
pts->y = ybase;
pts++;
*wids++ = xcr - xcl + 1;
}
}
er = xrk - (xr << 1) - er;
el = (xl << 1) - xlk - el;
boty = floor(-y0 - radius + 1.0);
if (ybase + y - boty > ymax)
boty = ymax - ybase - y;
while (y > boty)
{
k = (y << 1) + yk;
er -= k;
while ((er >= 0.0) && (xr >= 0))
{
xr--;
er += xrk - (xr << 1);
}
el -= k;
while ((el > 0.0) && (xl <= 0))
{
xl++;
el += (xl << 1) - xlk;
}
y--;
ybase++;
if (ybase < ymin)
continue;
xcl = xl + xbase;
xcr = xr + xbase;
CLIPSTEPEDGE(edgey1, edge1, edgeleft1);
CLIPSTEPEDGE(edgey2, edge2, edgeleft2);
if (xcr >= xcl)
{
pts->x = xcl;
pts->y = ybase;
pts++;
*wids++ = xcr - xcl + 1;
}
}
return (pts - points);
}
int
miRoundJoinFace (face, edge, leftEdge)
register LineFacePtr face;
register PolyEdgePtr edge;
Bool *leftEdge;
{
int y;
int dx, dy;
double xa, ya;
Bool left;
dx = -face->dy;
dy = face->dx;
xa = face->xa;
ya = face->ya;
left = 1;
if (ya > 0)
{
ya = 0.0;
xa = 0.0;
}
if (dy < 0 || dy == 0 && dx > 0)
{
dx = -dx;
dy = -dy;
left = !left;
}
if (dx == 0 && dy == 0)
dy = 1;
if (dy == 0)
{
y = ICEIL (face->ya) + face->y;
edge->x = -32767;
edge->stepx = 0;
edge->signdx = 0;
edge->e = -1;
edge->dy = 0;
edge->dx = 0;
edge->height = 0;
}
else
{
y = miPolyBuildEdge (xa, ya, 0.0, dx, dy, face->x, face->y, !left, edge);
edge->height = 32767;
}
*leftEdge = !left;
return y;
}
void
miRoundJoinClip (pLeft, pRight, edge1, edge2, y1, y2, left1, left2)
register LineFacePtr pLeft, pRight;
PolyEdgePtr edge1, edge2;
int *y1, *y2;
Bool *left1, *left2;
{
double denom;
denom = - pLeft->dx * (double)pRight->dy + pRight->dx * (double)pLeft->dy;
if (denom >= 0)
{
pLeft->xa = -pLeft->xa;
pLeft->ya = -pLeft->ya;
}
else
{
pRight->xa = -pRight->xa;
pRight->ya = -pRight->ya;
}
*y1 = miRoundJoinFace (pLeft, edge1, left1);
*y2 = miRoundJoinFace (pRight, edge2, left2);
}
int
miRoundCapClip (face, isInt, edge, leftEdge)
register LineFacePtr face;
Bool isInt;
register PolyEdgePtr edge;
Bool *leftEdge;
{
int y;
register int dx, dy;
double xa, ya, k;
Bool left;
dx = -face->dy;
dy = face->dx;
xa = face->xa;
ya = face->ya;
k = 0.0;
if (!isInt)
k = face->k;
left = 1;
if (dy < 0 || dy == 0 && dx > 0)
{
dx = -dx;
dy = -dy;
xa = -xa;
ya = -ya;
left = !left;
}
if (dx == 0 && dy == 0)
dy = 1;
if (dy == 0)
{
y = ICEIL (face->ya) + face->y;
edge->x = -32767;
edge->stepx = 0;
edge->signdx = 0;
edge->e = -1;
edge->dy = 0;
edge->dx = 0;
edge->height = 0;
}
else
{
y = miPolyBuildEdge (xa, ya, k, dx, dy, face->x, face->y, !left, edge);
edge->height = 32767;
}
*leftEdge = !left;
return y;
}
static void
miLineArc (pDraw, pGC, pixel, spanData, leftFace, rightFace, xorg, yorg, isInt)
DrawablePtr pDraw;
register GCPtr pGC;
unsigned long pixel;
SpanDataPtr spanData;
register LineFacePtr leftFace, rightFace;
double xorg, yorg;
Bool isInt;
{
DDXPointPtr points;
int *widths;
int xorgi, yorgi;
XID oldPixel;
Spans spanRec;
int n;
PolyEdgeRec edge1, edge2;
int edgey1, edgey2;
Bool edgeleft1, edgeleft2;
if (isInt)
{