void
paintrect( /* paint picture rectangle */
PNODE *p,
RECT *r
)
{
int mx, my;
if (p->xmax - p->xmin <= 0 || p->ymax - p->ymin <= 0)
return;
if (p->kid == NULL) {
(*dev->paintr)(greyscale?greyof(p->v):p->v,
p->xmin, p->ymin, p->xmax, p->ymax); /* do this */
return;
}
mx = (p->xmin + p->xmax) >> 1; /* do kids */
my = (p->ymin + p->ymax) >> 1;
if (mx > r->l) {
if (my > r->d)
paintrect(p->kid+DL, r);
if (my < r->u)
paintrect(p->kid+UL, r);
}
if (mx < r->r) {
if (my > r->d)
paintrect(p->kid+DR, r);
if (my < r->u)
paintrect(p->kid+UR, r);
}
}
void
getrepaint( /* get area and repaint */
char *s
)
{
RECT box;
if (getrect(s, &box) < 0)
return;
paintrect(&ptrunk, &box);
}
void
repaint( /* repaint a region */
int xmin,
int ymin,
int xmax,
int ymax
)
{
RECT reg;
reg.l = xmin; reg.r = xmax;
reg.d = ymin; reg.u = ymax;
paintrect(&ptrunk, ®);
}