static bool containsrect_proc(SkRegion& a, SkRegion& b) {
SkIRect r = a.getBounds();
r.inset(r.width()/4, r.height()/4);
(void)a.contains(r);
r = b.getBounds();
r.inset(r.width()/4, r.height()/4);
return b.contains(r);
}
void drawPredicates(SkCanvas* canvas, const SkPoint pts[]) {
SkRegion rgn;
build_base_rgn(&rgn);
drawstr(canvas, "Intersects", pts[0], rgn.intersects(fRect));
drawstr(canvas, "Contains", pts[1], rgn.contains(fRect));
}
static bool containsxy_proc(SkRegion& a, SkRegion& b) {
const SkIRect& r = a.getBounds();
const int dx = r.width() / 8;
const int dy = r.height() / 8;
for (int y = r.fTop; y < r.fBottom; y += dy) {
for (int x = r.fLeft; x < r.fRight; x += dx) {
(void)a.contains(x, y);
}
}
return true;
}