[require]
# Once gl_Vertex is changed to piglit_vertex, this test will work with
# GLSL ES 1.00 as well.
GLSL >= 1.10

[vertex shader]
#ifdef GL_ES
precision mediump float;
#endif

varying vec4 colour;

void main()
{
	gl_Position = gl_Vertex;

	colour = vec4(0.0, 1.0, 0.0, 1.0);
}

[fragment shader]
#ifdef GL_ES
precision mediump float;
#endif

varying vec4 colour;

void main()
{
	vec4 col = colour;

	while (col.b < 0.6) {
	      float r = col.r;
	      col.r = col.g;
	      col.g = r;
	      col.b += 0.25;
	}

	gl_FragColor = col;
}

[test]
clear color 0.0 0.0 0.0 0.0
clear
draw rect -1 -1 2 2
probe rgb 15 15 1.0 0.0 0.75