momento/src/level/draw.c

/* SPDX-License-Identifier: GPL-3.0-or-later */
/* Copyright (C) 2021 KikooDX */

#include "conf.h"
#include "level.h"
#include <libimg.h>

extern struct Level level;
extern img_t const img_tileset;

void level_draw(void)
{
	int x;
	int y;
	const int tileset_width = img_tileset.width / TILE_WIDTH;
	for (y = 0; y < level.height; y += 1)
		for (x = 0; x < level.width; x += 1) {
			const int draw_x = x * TILE_WIDTH;
			const int draw_y = y * TILE_HEIGHT;
			const Tile tile =
			    level.data[x + y * level.width];
			img_render_vram(img_sub(img_tileset,
			    (int)(tile % tileset_width) * TILE_WIDTH,
			    (int)(tile / tileset_width) * TILE_HEIGHT,
			    TILE_WIDTH, TILE_HEIGHT), draw_x, draw_y);
		}
}