[require]
GLSL >= 1.40

[vertex shader]
in vec4 piglit_vertex;

void main()
{
    gl_Position = piglit_vertex;
}

[fragment shader]
layout(std140) uniform UB1 {
    bool        b1;
};

precision highp float;

out vec4 piglit_fragcolor;

void main()
{
    piglit_fragcolor = bool(b1) ? vec4(0, 1, 0, 1) : vec4(1, 0, 0, 1);
}

[test]
uniform int b1 0

draw rect -1 -1 2 2
probe all rgba 0.0 1.0 0.0 1.0