static SkIRect rand_rect(SkMWCRandom& rand, int n) {
int x = rand.nextS() % n;
int y = rand.nextS() % n;
int w = rand.nextU() % n;
int h = rand.nextU() % n;
return SkIRect::MakeXYWH(x, y, w, h);
}
static void rand_array(SkMWCRandom& rand, int array[], int n) {
for (int j = 0; j < n; j++) {
array[j] = rand.nextS() & 0xFF;
}
}