[require]
GLSL >= 1.10

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

[fragment shader]
vec4 mix_lighting(gl_LightSourceParameters l)
{
	return l.constantAttenuation / 2.0 + l.ambient.xwxx;
}

void main()
{
	gl_FragColor = mix_lighting(gl_LightSource[0]);
}

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