[require]
GLSL >= 1.20

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

[fragment shader]
void main() {
   const float sqrt_two_over_two = sin(0.785398163397448);
   const float one = sin(1.5707963267949);
   const float one_half = sin(2.61799387799149);
   gl_FragColor = vec4(sqrt_two_over_two, one, one_half, 1.0);
}

[test]
draw rect -1 -1 2 2
probe all rgb 0.707106781186548 1.0 0.5