[pixel shader]
uniform float4 x;
uniform float4 y;

float4 main() : sv_target
{
    return distance(x, y);
}

[test]
uniform 0 float4 -2.0 3.0 4.0 0.1
uniform 4 float4 2.0 -1.0 4.0 5.0
todo(glsl) draw quad
probe all rgba (7.483983, 7.483983, 7.483983, 7.483983) 1

[pixel shader]
uniform int4 x;
uniform int4 y;

float4 main() : sv_target
{
    return distance(x, y);
}