sraRegion *
sraRgnCreateRect(int x1, int y1, int x2, int y2) {
sraSpanList *vlist, *hlist;
sraSpan *vspan, *hspan;
/* - Build the horizontal portion of the span */
hlist = sraSpanListCreate();
hspan = sraSpanCreate(x1, x2, NULL);
sraSpanInsertAfter(hspan, &(hlist->front));
/* - Build the vertical portion of the span */
vlist = sraSpanListCreate();
vspan = sraSpanCreate(y1, y2, hlist);
sraSpanInsertAfter(vspan, &(vlist->front));
sraSpanListDestroy(hlist);
return (sraRegion*)vlist;
}
static sraSpanList *
sraSpanListDup(const sraSpanList *src) {
sraSpanList *newlist;
sraSpan *newspan, *curr;
if (!src) return NULL;
newlist = sraSpanListCreate();
curr = src->front._next;
while (curr != &(src->back)) {
newspan = sraSpanDup(curr);
sraSpanInsertBefore(newspan, &(newlist->back));
curr = curr->_next;
}
return newlist;
}
sraSpanList *
sraSpanListDup(const sraSpanList *src)
{
sraSpanList *newlist;
sraSpan *newspan, *curr;
if (IsBadReadPtr(src,sizeof(sraSpan))) return NULL;
newlist = sraSpanListCreate();
curr = src->front._next;
while ((curr != &(src->back)) && (!IsBadReadPtr(curr,sizeof(sraSpan))))
{
newspan = sraSpanDup(curr);
sraSpanInsertBefore(newspan, &(newlist->back));
curr = curr->_next;
}
return newlist;
}
sraRegion *
sraRgnCreate() {
return (sraRegion*)sraSpanListCreate();
}
