Vertical callback or per pixel callback : I understand/How does Tilengine work?

[System64]

Hi,

As a general rule, there are two things to take into account when dealing with resources:

1. Don't delete a resource you don't own.

You own a resource when you explicitly create, load or clone it. You don't own a resource that has been chain-loaded and is a child of another resource. You should not do this:

Code:

TLN_Tilemap tilemap = TLN_LoadTilemap("tilemap.tmx", NULL); // load tilemap, you own it
TLN_Tileset tileset = TLN_GetTilemapTileset(tilemap); // gets chain-loaded tileset, you don't own it
TLN_DeleteTileset(tileset); // wrong! you don't own the tileset

2. Don't delete a resource that is currently assigned to the renderer.

Also applies to child resources, when you delete an owned resource, all of its owned child resources get deleted with it

Code:

TLN_Tileset tileset = TLN_LoadTileset("tileset.tsx"); // loads tileset
TLN_Palette palette = TLN_GetTilesetPalette(tileset); // gets palette of tileset
TLN_SetLayerPalette(0, palette); // assigns child palette to layer renderer
TLN_DeleteTileset(tileset); // wrong! tileset's palette is still atached to layer 0 but gets destroyed

Hi!
Makes sense!
Now I only delete tilemaps from layers, I don't touch their tilesets nor their palettes and so on.
so I just can do 

TLN_Tilemap tilemap = TLN_GetLayerTilemap(myLayer);
TLN_DeleteTilemap(tilemap);
tilemap = NULL;

?