Consume Edge Maps on the GPU

EdgeMap.hlsl

void getSpriteEdges_float(UnityTexture2D edgeMap, UnitySamplerState ss, float2 uv, out float top, out float right, out float left, out float bot) {

  //MY COUNTERPART IS EdgeMapUtils.GetEdge
	float4 color = edgeMap.Sample(ss, uv);

	top = color.r;
	right = color.g;
	left = color.b;
	bot = color.a;

}