[require]
GLSL >= 1.10

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

[fragment shader]
uniform vec4 color;

void main()
{
	mat3 m = mat3(0.1, 0.8, 0.1,
		      0.3, 0.3, 0.5,
		      0.9, 0.0, 0.1);
	vec3 n = m * color.xyz;
	gl_FragColor = vec4(n * 0.5 + 0.5, 1.0);
}

[test]
uniform vec4 color 1.0 0.0 0.0 0.0
draw rect -1 -1 2 2
probe all rgba 0.55 0.90 0.55 1.0