[require]
GLSL >= 1.10

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

[fragment shader]
uniform vec4 val;

void main()
{
	gl_FragColor = vec4(0.0, 0.5 + val[2], 0.0, 0.0);
}

[test]
uniform vec4 val 0.0 0.0 0.5 0.0
draw rect -1 -1 2 2
probe rgb 1 1 0.0 1.0 0.0