[require]
GLSL >= 1.10

[vertex shader]
varying vec4 color;
uniform vec4 v4;
uniform vec3 v3;
uniform vec2 v2;
uniform float v1;

void main()
{
        gl_Position = gl_Vertex;

	color.xyzw = v4;
	color.xyz = v3;
	color.xy = v2;
	color.x = v1;
}

[fragment shader]
varying vec4 color;

void main()
{
        gl_FragColor = color;
}

[test]
uniform vec4  v4 0.9 0.9 0.9 0.4
uniform vec3  v3 0.9 0.9 0.3
uniform vec2  v2 0.9 0.2
uniform float v1 0.1

draw rect -1 -1 2 2

probe all rgba 0.1 0.2 0.3 0.4