memory related refactor

src/lighting/Lightmap.cpp

@@ -15,16 +15,16 @@ void Lightmap::set(const light_t* map) {
 
 static_assert(sizeof(light_t) == 2, "replace dataio calls to new light_t");
 
-ubyte* Lightmap::encode() const {
-    ubyte* buffer = new ubyte[LIGHTMAP_DATA_LEN];
+std::unique_ptr<ubyte[]> Lightmap::encode() const {
+    auto buffer = std::make_unique<ubyte[]>(LIGHTMAP_DATA_LEN);
     for (uint i = 0; i < CHUNK_VOL; i+=2) {
         buffer[i/2] = ((map[i] >> 12) & 0xF) | ((map[i+1] >> 8) & 0xF0);
     }
     return buffer;
 }
 
-light_t* Lightmap::decode(ubyte* buffer) {
-    light_t* lights = new light_t[CHUNK_VOL];
+std::unique_ptr<light_t[]> Lightmap::decode(ubyte* buffer) {
+    auto lights = std::make_unique<light_t[]>(CHUNK_VOL);
     for (uint i = 0; i < CHUNK_VOL; i+=2) {
         ubyte b = buffer[i/2];
         lights[i] = ((b & 0xF) << 12);