#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

static uint32_t	canvas[16][16];

static uint32_t	rgb888(int method, uint8_t rgb332)
{
	int	r, g, b, n;

	r = (rgb332 >> 5) & 0x07;
	g = (rgb332 >> 2) & 0x07;
	b = (rgb332 >> 0) & 0x03;

	switch (method) {
	case	0:
		r <<= 5;
		g <<= 5;
		b <<= 6;
		break;
	case	1:
		r = (r << 5) | (r << 2) | (r >> 1);
		g = (g << 5) | (g << 2) | (g >> 1);
		b = (b << 6) | (b << 4) | (b << 2) | b;
		break;
	case	2:
		r = (r << 5) | (r << 2) | (r >> 1);
		g = (g << 5) | (g << 2) | (g >> 1);
		b = (b << 1) | (b >> 2);
		b = (b << 5) | (b << 2) | (b >> 1);
		break;
	default:
		r = g = b = 0;
		break;
	}

	n = (r << 16) | (g << 8) | b;

	return n;
}

int main(int argc, char *argv[])
{
	int	x, y, n;

	if (argc < 2) {
		printf("%s [method]\n", argv[0]);
		goto fin0;
	}

	/* 埋める */
	n = atoi(argv[1]);
	for (y = 0; y < 16; y++) {
		for (x = 0; x < 16; x++) {
			canvas[y][x] = rgb888(n, (y << 4) | x);
		}
	}

	/* 結果を表示する */
	printf("# ImageMagick pixel enumeration: 192,192,255,rgb\n");
	for (y = 0; y < 192; y++) {
		for (x = 0; x < 192; x++) {
			printf("%d,%d: (%3d,%3d,%3d)\n", x, y,
			       (canvas[y / 12][x / 12] >> 16) & 0xff,
			       (canvas[y / 12][x / 12] >>  8) & 0xff,
			       (canvas[y / 12][x / 12] >>  0) & 0xff);
		}
	}

fin0:
	return 0;
}