void SpanFiller::Render(int val, int len)
{
	if(val == 0) {
		t += len;
		s += len;
		return;
	}
	if(alpha != 256)
		val = alpha * val >> 8;
	if(val == 256 && ss->opaque) {
		const RGBA *e = s + len;
		const RGBA *s0 = s;
		while(s < e && s->a == 0)
			s++;
		t += s - s0;
		s0 = s;
		while(s < e && s->a != 255)
			s++;
		AlphaBlend(t, s0, val, s - s0);
		t += s - s0;
		s0 = s;
		while(s < e && s->a == 255)
			s++;
		memcpy32(t, s0, s - s0);
		t += s - s0;
		s0 = s;
		while(s < e && s->a)
			s++;
		AlphaBlend(t, s0, val, s - s0);
	}
	else
		AlphaBlend(t, s, val, len);
	t += len;
	s += len;
}