[require]
GLSL >= 1.10

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

[fragment shader]
uniform vec4 arg0;
void main()
{
	gl_FragColor = max(vec4(0.25), arg0);
}

[test]
uniform vec4 arg0 0.0 1.0 -1.0 0.0
draw rect -1 -1 2 2
probe all rgba 0.25 1.0 0.25 0.25