#include "display_engine.h"

void display_map(const int x_offset, const int y_offset)
{
    extern const struct map map_world;
    extern const bopti_image_t img_tileset;

	for (int layer = 0 ; layer < map_world.nb_layers; layer++)
    {
        for (int y = 0 ; y <= SCREEN_HEIGHT; y ++)
        {
            for (int x = 0 ; x <= SCREEN_WIDTH; x ++)
            {
                unsigned int tile_id = 0;
                if (x < map_world.width && y < map_world.height) tile_id = map_world.layers[layer][(y + y_offset / TILE_SIZE) * map_world.width + (x + x_offset / TILE_SIZE)];
                
                if (tile_id != 0)
                {
                    tile_id --;
                    unsigned int tile_x = TILE_SIZE * (tile_id % TILESET_WIDTH);
                    unsigned int tile_y = TILE_SIZE * (tile_id / TILESET_WIDTH);
                   
                    dsubimage(x * TILE_SIZE - (x_offset % TILE_SIZE), y * TILE_SIZE - (y_offset % TILE_SIZE), &img_tileset, tile_x, tile_y, TILE_SIZE, TILE_SIZE, DIMAGE_NONE);
                }
            }
        }
    }
}