typedef struct
{
    float32 wall_vertex[2][2];

    int8 wall_texture_id[4];
    int16 wall_lightmap_id[4];

    int8 flat_texture_id[2];
    int16 flat_lightmap_id[2];

    int8 cell_type;

    int8 was_floor_negative;
    int8 was_ceil_negative;

    int8 is_lightmapped;

} sLV_Cell__File_Only;

typedef struct
{
    sLV_Cell__File_Only map[LV_MAP_CELLS_COUNT];

    char wall_texture_filename[128][IO_MAX_STRING_TEX_FILENAME];
    char flat_texture_filename[128][IO_MAX_STRING_TEX_FILENAME];

    char title_01[IO_MAX_STRING_TITLE];
    char title_02[IO_MAX_STRING_TITLE];

    int16 wall_lightmaps_count;
    int16 flat_lightmaps_count;

    int8 wall_textures_count;
    int8 flat_textures_count;

    int8 player_starting_cell_x;
    int8 player_starting_cell_y;

    int8 player_starting_angle;

} sLV_Level__File_Only;


// WCZYTYWANIE
    FILE* file_in;
    file_in = fopen(level_filename, "rb");

    if (file_in == NULL)
        return 0;

    fread(&LV_Level__File_Only, sizeof(sLV_Level__File_Only), 1, file_in);
    fclose(file_in);

// ZAPIS
    FILE* file_out;
    file_out = _wfopen(APP_filename, L"wb");
    int result = (int)fwrite(&APP_level_file, sizeof(sLV_Level__File_Only), 1, file_out);
    fclose(file_out);