/*
 * Test app for _NET_WM_ICON formatting.
 * Copyright © 2022 Nick Bowler
 *
 * Use a fake colour scheme to generate an icon of the chosen size (16x16,
 * 24x24, 32x32 or 48x48) and display the pixels as characters.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <X11/Intrinsic.h>
#include "motif.h"

static const char *progname = "ewmhicon";

static void print_usage(FILE *f)
{
	fprintf(f, "Usage: %s size\n", progname);
}

static const char sizes[][6] = {
	"16x16", "24x24", "32x32", "48x48"
};

int to_size_enum(const char *arg)
{
	char buf[8];
	unsigned i;

	if (!strchr(arg, 'x')) {
		sprintf(buf, "%.3sx%.3s", arg, arg);
		arg = buf;
	}

	for (i = 0; i < sizeof sizes / sizeof sizes[0]; i++) {
		if (!strcmp(arg, sizes[i]))
			return i;
	}

	return -1;
}

static unsigned long icon_buf[48*48];

int main(int argc, char **argv)
{
	void (*tilefunc)(unsigned long *, const XColor *, int, int);
	XColor c[COLOUR_MAX] = {0};
	int size, x, y, w, h;

	if (argc > 0)
		progname = argv[0];

	if (argc != 2) {
		print_usage(stderr);
		return EXIT_FAILURE;
	}

	size = to_size_enum(argv[1]);
	if (size < 0) {
		printf("%s: error: invalid size %s\n", progname, argv[1]);
		return EXIT_FAILURE;
	}

	switch (size) {
	case ICON_16x16: tilefunc = ewmh_tile16; w = h = 16; break;
	case ICON_24x24: tilefunc = ewmh_tile24; w = h = 24; break;
	case ICON_32x32: tilefunc = ewmh_tile32; w = h = 32; break;
	case ICON_48x48: tilefunc = ewmh_tile48; w = h = 48; break;
	default: assert(0);
	}

	c[COLOUR_PRIMARY].red = 0xffff;
	c[COLOUR_DARK].green  = 0xffff;
	c[COLOUR_LIGHT].blue  = 0xffff;

	for (x = 0; x < 3; x++) {
		for (y = 0; y < 3; y++) {
			tilefunc(icon_buf, c, x, y);
		}
	}

	for (y = 0; y < h; y++) {
		for (x = 0; x < w; x++) {
			unsigned long val = icon_buf[y*h+x];
			int c = ' ';

			if      (val == 0xffff0000) c = '.'; // primary
			else if (val == 0xff00ff00) c = '%'; // dark
			else if (val == 0xff0000ff) c = '+'; // light

			putchar(c);
		}
		putchar('\n');
	}

	return 0;
}