JavaFX 8 Canvas Snapshot with alpha

Question

I am currently working on a paint program (similar to Gimp and Photoshop) and in order to do that, I will need layers. I created a class called JImage which has a Arra

Answer 1

Set the fill for your SnapshotParameters to Color.TRANSPARENT before you take a snapshot.

SnapshotParameters params = new SnapshotParameters();
params.setFill(Color.TRANSPARENT);
Image snapshot = currLayer.snapshot(params, null);

From the javadoc:

Sets the fill to the specified value. This is used to fill the entire image being rendered prior to rendering the node. A value of null indicates that the color white should be used for the fill. The default value is null.