Context

It would be very handy if it were possible to toggle visibility of certain layers on/off during a game. This should be possible for both native & json file formats as it seems the json export allows you to split the layers.

Proposal

I did a bit of digging through the source, and I think at a high level this might look like:

• Each sprite is processed per-layer
• Each frame of an animation is a GraphicsGroup of all visible layers
• Layers are toggleable from the aseprite resource. Maybe resource.toggleLayer(name, boolean)

Not sure how well this concept of animation frames being a GraphicsGroup fits into the ex.Animation class. Maybe the logic for layering should be done there, and then this plugin would just parse them appropriately.

Caveats

With a json export, the image is exported with split layers is all in 1 image so there is potential for it to get very big with many layers. But with a native resource it seems like the parser writes to a canvas to make the image source, so maybe we could parse each layer as its own image source to keep the texture size low?