Add Tileset.loadFromTilemap/TileMap.toImage function for scripts.

[MainMemory]

Currently, Tiled can create "metatilesets" that are based on other tilemaps, but only if you create it as a .tsx file. There is no mechanism for loading a TileMap object directly into a Tileset, nor is there a way to generate an Image from a TileMap, which could be another method of implementing this function. There is also no way to retrieve an Image for a given Tile, so if I wanted to do something like this in scripting, I would have to process the original tileset's image, cut it into tiles and place them in a larger image manually.

[bjorn]

There is no mechanism for loading a TileMap object directly into a Tileset

You mean you don't have your map saved as a file, so that you could do the following?

tileset.image = "mapfile.tmx"

I think for the need to load a map generated in script directly as a tileset, it would indeed be nice to have a TileMap.toImage function. I'm worrying a lot about all the parameters for rendering maps to image, as are available when using "Export as Image" or when using the tmxrasterizer, but probably a simple function without parameters, that behaves exactly as if the map was referenced as the source of a tileset, would be a good addition for now.

There is also no way to retrieve an Image for a given Tile

Hmm, yes there could definitely be added a Tile.image property as well, though I would make it read-only despite having Tile.setImage, since directly changing the image is not something covered by the undo system.

[MainMemory]

If setting the image property on a Tileset can accept a TileMap file, and it reloads the tileset, then that's all I need, but the documentation doesn't say anything about any side effects from setting the image property. That should probably be made more clear if that's the case.

[bjorn]

Changing the Tileset.image property should do pretty much the same thing as changing the image of a tileset in the Properties view. Given the required loading of the image in this case, it indeed makes sense to add a note regarding that.

[MainMemory]

Yes, it works, however there does not seem to be any way to set a transparent color for a Tileset in script, like you can in a .tsx file.

[bjorn]

Yes, it works, however there does not seem to be any way to set a transparent color for a Tileset in script, like you can in a .tsx file.

It appears to have been left undocumented, but there is Tileset.transparentColor, which you can assign to by string like tileset.transparentColor = "#FF00FF" (57fa2d2).

[MainMemory]

Great, thanks!