[require]
GLSL >= 1.20

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

[fragment shader]
#version 120

uniform float arg0;
uniform float arg1;

void main()
{
	bool t = bool(arg0);
	bool f = bool(arg1);

	gl_FragColor = vec4(1.0 - float(t),
			    float(t) / 2.0,
			    float(f),
			    1.0 - float(f));
}

[test]
uniform float arg0 0.5
uniform float arg1 0.0
draw rect -1 -1 2 2
probe all rgba 0.0 0.5 0.0 1.0