Edge Mask Source

Source Type ID: dynamic_asset_generator:mask/edge

Format:

{
    "type": "dynamic_asset_generator:mask/edge",
    "source": {   },
    "count_outside_frame": false, // optional, defaults to false
    "edges": [
        "north",
        "northeast",
        "east",
        "southeast",
        "south",
        "southwest",
        "west",
        "northwest"
    ], // optional, defaults to all directions
    "cutoff": 128, // optional, defaults to 128
}

Generates a mask which is solid everywhere the provided source has an edge, and transparent otherwise. The edges may be any subset of north, northeast, east, southeast, south, southwest, west, and northwest. The cutoff must be an integer between 0 and 255, inclusive. A pixel is considered to be an edge if it's alpha is greater than or equal to the cutoff and at least one of its neighbors, in the provided edges, is less than the cutoff. If count_outside_frame is true, then pixels outside the frame are considered to always be less than the cutoff.