[require]
GLSL >= 1.20

[vertex shader]
void main()
{
	gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
}

[fragment shader]
void main()
{
    const vec3 v = log2(vec3(1.0, 8.0, 65536.0));
    if (v == vec3(0.0, 3.0, 16.0))
        gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);
    else
        gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);
}

[test]
draw rect -1 -1 2 2
probe all rgb 0 1 0