[texture 0]
size (2, 2)
0.1 0.2 0.3 0.4     0.5 0.7 0.6 0.8
0.6 0.5 0.2 0.1     0.8 0.0 0.7 1.0

[pixel shader]
Texture2D t;

float4 main(float4 pos : sv_position) : sv_target
{
    return t.Load(int3(pos.xy, 0));
}

[test]
draw quad
probe rgba (0, 0) (0.1, 0.2, 0.3, 0.4)
probe rgba (1, 0) (0.5, 0.7, 0.6, 0.8)
probe rgba (0, 1) (0.6, 0.5, 0.2, 0.1)
probe rgba (1, 1) (0.8, 0.0, 0.7, 1.0)