[require]
GLSL >= 1.30

[vertex shader]
#version 130
void main()
{
	gl_Position = gl_Vertex;
}

[fragment shader]
#version 130

uniform int i;

void main()
{
	gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0);
	vec4 tmp = vec4(0.0, 0.0, 0.0, 0.0);
	switch (i) {
	case 0:
		gl_FragColor.x = 1.0;
		break;
	case 1:
		gl_FragColor.y = 1.0;
		break;
	default:
		gl_FragColor.z = 1.0;
		break;
	}
}

[test]
uniform int i 0
draw rect -1 -1 1 1
uniform int i 1
draw rect 0 -1 1 1
uniform int i 2
draw rect -1 0 1 1

relative probe rgba (0, 0) (1, 0, 0, 0)
relative probe rgba (1, 0) (0, 1, 0, 0)
relative probe rgba (0, 1) (0, 0, 1, 0)