#include "local_proto.h"
 
void set_buffer(CELL* buffer, int x, int y, int width, int height, int sx, int sy, int align) {
	int l, r, t, b;
	int i, j;
	int dx, dy;
	
	switch(align) {
		case 0: /* center */
			dx = width / 2;
			dy = height / 2;
			l = x - dx;
			r = x + dx;
			t = y - dy;
			b = y + dy;
			break;
		case 1: /* top-left */
			l = x;
			r = x + width - 1;
			t = y;
			b = y + height - 1;
			break;
		case 2: /* top-right */
			l = x - width + 1;
			r = x;
			t = y;
			b = y + height - 1;
			break;
		case 3: /* bottom-left */
			l = x;
			r = x + width - 1;
			t = y - height + 1;
			b = y;
			break;
		case 4: /* bottom-right */
			l = x - width + 1;
			r = x;
			t = y - height + 1;
			b = y;
			break;
		default: 
			l = t = 0;
			r = b = 1;
			break;
	}
	
	l = l < 0 ? 0 : l;
	r = r >= sx ? sx - 1 : r;
	t = t < 0 ? 0 : t;
	b = b >= sy ? sy - 1 : b;
	
	/* fill buffer */
	for(j = t; j <= b; j++) {
		for(i = l; i <= r; i++) {
			buffer[j * sx + i] = 1;
		}
	}
}