void
spiro_to_bpath(const spiro_seg *s, int n, bezctx *bc)
{
int i;
int nsegs = s[n - 1].ty == '}' ? n - 1 : n;
for (i = 0; i < nsegs; i++) {
double x0 = s[i].x;
double y0 = s[i].y;
double x1 = s[i + 1].x;
double y1 = s[i + 1].y;
if (i == 0)
bezctx_moveto(bc, x0, y0, s[0].ty == '{');
bezctx_mark_knot(bc, i);
spiro_seg_to_bpath(s[i].ks, x0, y0, x1, y1, bc, 0);
}
}
void
spiro_to_bpath(const spiro_seg *s, int n, bezctx *bc)
{
int i, nsegs;
double x0, y0, x1, y1;
if (s==NULL || n <= 0 || bc==NULL) return;
nsegs = s[n - 1].ty == '}' ? n - 1 : n;
for (i = 0; i < nsegs; i++) {
x0 = s[i].x; x1 = s[i + 1].x;
y0 = s[i].y; y1 = s[i + 1].y;
if (i == 0)
bezctx_moveto(bc, x0, y0, s[0].ty == '{');
bezctx_mark_knot(bc, i);
spiro_seg_to_bpath(s[i].ks, x0, y0, x1, y1, bc, 0);
}
}
void
spiro_to_bpath0(const spiro_cp *src, const spiro_seg *s,
double *dm, int ncq, int n, bezctx *bc)
{
int i, j, nsegs;
double x0, y0, x1, y1;
#ifdef VERBOSE
printf("spiro_to_bpath0 n=%d s=%d bc=%d\n",n,s==NULL ? 0:1,bc==NULL ? 0:1);
#endif
if (s==NULL || n <= 0 || bc==NULL) return;
nsegs = s[n - 1].ty == '}' ? \
s[n - 2].ty == 'a' ? n - 2 : n - 1 : n;
for (i=j=0; i < nsegs; i++,j++) {
x0 = s[i].x; y0 = s[i].y;
if (i == 0) {
if (src != NULL) {
bezctx_moveto(bc, src[0].x, src[0].y, s[0].ty == '{');
} else {
bezctx_moveto(bc, (x0 * dm[0] + dm[1]), (y0 * dm[0] + dm[2]), s[0].ty == '{');
}
if (nsegs > 1 && s[1].ty == 'h') ++i;
} else
if (s[i].ty == 'a') ++i;
x1 = s[i + 1].x; y1 = s[i + 1].y;
if (src != NULL) {
dm[3] = src[i + 1].x; dm[4] = src[i + 1].y;
} else {
dm[3] = (x1 * dm[0] + dm[1]); dm[4] = (y1 * dm[0] + dm[2]);
}
bezctx_mark_knot(bc, j);
spiro_seg_to_bpath0(s[i].ks, dm, x0, y0, x1, y1, bc, ncq, 0);
}
}
