package level import ( "bytes" "fmt" "io/ioutil" "os" "git.kirsle.net/apps/doodle/pkg/filesystem" "github.com/vmihailenco/msgpack" ) // ToBinary serializes the level to binary format. func (m *Level) ToBinary() ([]byte, error) { header := filesystem.MakeHeader(filesystem.BinLevelType) out := bytes.NewBuffer(header) encoder := msgpack.NewEncoder(out) err := encoder.Encode(m) return out.Bytes(), err } // WriteBinary writes a level to binary format on disk. func (m *Level) WriteBinary(filename string) error { bin, err := m.ToBinary() if err != nil { return fmt.Errorf("Level.WriteBinary: encode error: %s", err) } err = ioutil.WriteFile(filename, bin, 0755) if err != nil { return fmt.Errorf("Level.WriteBinary: WriteFile error: %s", err) } return nil } // LoadBinary loads a map from binary file on disk. func LoadBinary(filename string) (*Level, error) { fh, err := os.Open(filename) if err != nil { return nil, err } defer fh.Close() // Read and verify the file header from the binary format. err = filesystem.ReadHeader(filesystem.BinLevelType, fh) if err != nil { return nil, err } // Decode the file from disk. m := New() decoder := msgpack.NewDecoder(fh) err = decoder.Decode(&m) if err != nil { return m, fmt.Errorf("level.LoadBinary: decode error: %s", err) } // Fill in defaults. if m.Wallpaper == "" { m.Wallpaper = DefaultWallpaper } // Inflate the chunk metadata to map the pixels to their palette indexes. m.Inflate() return m, err }