[require]
GLSL >= 1.10

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

[fragment shader]
uniform vec4 color;

void main()
{
	/* The i965 driver failed when it was faced with a saturate of
	 * a uniform -- https://bugs.freedesktop.org/show_bug.cgi?id=57166
	 */
	gl_FragColor = clamp(color, 0.0, 1.0) * 0.5 + 0.25;
}

[test]
uniform vec4 color -1.0 1.0 2.0 0.0

draw rect -1 -1 2 2
probe all rgba 0.25 0.75 0.75 0.25