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- #include "lib9.h"
- #include "draw.h"
- #include "tk.h"
- #include "canvs.h"
- #define O(t, e) ((long)(&((t*)0)->e))
- typedef struct TkCpoly TkCpoly;
- struct TkCpoly
- {
- int width;
- Image* stipple;
- Image* pen;
- TkCanvas* canv;
- int smooth;
- int steps;
- int winding;
- };
- static
- TkStab tkwinding[] =
- {
- "nonzero", ~0,
- "odd", 1,
- nil
- };
- /* Polygon Options (+ means implemented)
- +fill
- +smooth
- +splinesteps
- +stipple
- +tags
- +width
- +outline
- */
- static
- TkOption polyopts[] =
- {
- "width", OPTnnfrac, O(TkCpoly, width), nil,
- "stipple", OPTbmap, O(TkCpoly, stipple), nil,
- "smooth", OPTstab, O(TkCpoly, smooth), tkbool,
- "splinesteps", OPTdist, O(TkCpoly, steps), nil,
- "winding", OPTstab, O(TkCpoly, winding), tkwinding,
- nil
- };
- static
- TkOption itemopts[] =
- {
- "tags", OPTctag, O(TkCitem, tags), nil,
- "fill", OPTcolr, O(TkCitem, env), IAUX(TkCfill),
- "outline", OPTcolr, O(TkCitem, env), IAUX(TkCforegnd),
- nil
- };
- void
- tkcvspolysize(TkCitem *i)
- {
- int w;
- TkCpoly *p;
- p = TKobj(TkCpoly, i);
- w = TKF2I(p->width);
- i->p.bb = bbnil;
- tkpolybound(i->p.drawpt, i->p.npoint, &i->p.bb);
- i->p.bb = insetrect(i->p.bb, -w);
- }
- char*
- tkcvspolycreat(Tk* tk, char *arg, char **val)
- {
- char *e;
- TkCpoly *p;
- TkCitem *i;
- TkCanvas *c;
- TkOptab tko[3];
- c = TKobj(TkCanvas, tk);
- i = tkcnewitem(tk, TkCVpoly, sizeof(TkCitem)+sizeof(TkCpoly));
- if(i == nil)
- return TkNomem;
- p = TKobj(TkCpoly, i);
- p->width = TKI2F(1);
- p->winding = ~0;
- e = tkparsepts(tk->env->top, &i->p, &arg, 1);
- if(e == nil && i->p.npoint < 3)
- e = TkBadvl;
- if(e != nil) {
- tkcvsfreeitem(i);
- return e;
- }
- tko[0].ptr = p;
- tko[0].optab = polyopts;
- tko[1].ptr = i;
- tko[1].optab = itemopts;
- tko[2].ptr = nil;
- e = tkparse(tk->env->top, arg, tko, nil);
- if(e != nil) {
- tkcvsfreeitem(i);
- return e;
- }
- p->canv = c;
- e = tkcaddtag(tk, i, 1);
- if(e != nil) {
- tkcvsfreeitem(i);
- return e;
- }
- tkcvspolysize(i);
- tkmkpen(&p->pen, i->env, p->stipple);
- e = tkvalue(val, "%d", i->id);
- if(e != nil) {
- tkcvsfreeitem(i);
- return e;
- }
- tkcvsappend(c, i);
- tkbbmax(&c->update, &i->p.bb);
- tkcvssetdirty(tk);
- return nil;
- }
- char*
- tkcvspolycget(TkCitem *i, char *arg, char **val)
- {
- TkOptab tko[3];
- TkCpoly *p = TKobj(TkCpoly, i);
- tko[0].ptr = p;
- tko[0].optab = polyopts;
- tko[1].ptr = i;
- tko[1].optab = itemopts;
- tko[2].ptr = nil;
- return tkgencget(tko, arg, val, i->env->top);
- }
- char*
- tkcvspolyconf(Tk *tk, TkCitem *i, char *arg)
- {
- char *e;
- TkOptab tko[3];
- TkCpoly *p = TKobj(TkCpoly, i);
- tko[0].ptr = p;
- tko[0].optab = polyopts;
- tko[1].ptr = i;
- tko[1].optab = itemopts;
- tko[2].ptr = nil;
- e = tkparse(tk->env->top, arg, tko, nil);
- tkcvspolysize(i);
- tkmkpen(&p->pen, i->env, p->stipple);
- return e;
- }
- void
- tkcvspolyfree(TkCitem *i)
- {
- TkCpoly *p;
- p = TKobj(TkCpoly, i);
- if(p->stipple)
- freeimage(p->stipple);
- if(p->pen)
- freeimage(p->pen);
- }
- void
- tkcvspolydraw(Image *img, TkCitem *i, TkEnv *pe)
- {
- int w;
- TkEnv *e;
- TkCpoly *p;
- Image *pen;
- Point *pts;
- USED(pe);
- p = TKobj(TkCpoly, i);
- e = i->env;
- pen = p->pen;
- if(pen == nil && (e->set & (1<<TkCfill)))
- pen = tkgc(e, TkCfill);
- pts = i->p.drawpt;
- if(i->p.npoint > 0 && pen != nil) {
- if (p->smooth == BoolT)
- fillbezspline(img, pts, i->p.npoint+1, p->winding, pen, pts[0]);
- else
- fillpoly(img, pts, i->p.npoint+1, p->winding, pen, pts[0]);
- }
- w = TKF2I(p->width) - 1;
- if(w >= 0 && (e->set & (1<<TkCforegnd))) {
- pen = tkgc(i->env, TkCforegnd);
- if (p->smooth == BoolT)
- bezspline(img, pts, i->p.npoint+1, Enddisc, Enddisc, w, pen, pts[0]);
- else
- poly(img, pts, i->p.npoint+1, Enddisc, Enddisc, w, pen, pts[0]);
- }
- }
- char*
- tkcvspolycoord(TkCitem *i, char *arg, int x, int y)
- {
- char *e;
- TkCpoints p;
- if(arg == nil) {
- tkxlatepts(i->p.parampt, i->p.npoint, x, y);
- tkxlatepts(i->p.drawpt, i->p.npoint, TKF2I(x), TKF2I(y));
- i->p.drawpt[i->p.npoint] = i->p.drawpt[0];
- i->p.bb = rectaddpt(i->p.bb, Pt(TKF2I(x), TKF2I(y)));
- }
- else {
- e = tkparsepts(i->env->top, &p, &arg, 1);
- if(e != nil)
- return e;
- if(p.npoint < 2) {
- tkfreepoint(&p);
- return TkFewpt;
- }
- tkfreepoint(&i->p);
- i->p = p;
- tkcvspolysize(i);
- }
- return nil;
- }
- int
- tkcvspolyhit(TkCitem *item, Point p)
- {
- Point *poly;
- int r, np, fill, w;
- TkCpoly *l;
- TkEnv *e;
- l = TKobj(TkCpoly, item);
- w = TKF2I(l->width) + 2; /* include some slop */
- e = item->env;
- fill = e->set & (1<<TkCfill);
- if (l->smooth == BoolT) {
- /* this works but it's slow if used intensively... */
- np = getbezsplinepts(item->p.drawpt, item->p.npoint + 1, &poly);
- if (fill)
- r = tkinsidepoly(poly, np, l->winding, p);
- else
- r = tklinehit(poly, np, w, p);
- free(poly);
- } else {
- if (fill)
- r = tkinsidepoly(item->p.drawpt, item->p.npoint, l->winding, p);
- else
- r = tklinehit(item->p.drawpt, item->p.npoint + 1, w, p);
- }
- return r;
- }
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