#version 310 es
precision mediump float;

layout(location = 0) out vec4 FragColor;
layout(location = 0) in vec2 vUV;
layout(binding = 0) uniform sampler2D uSampler;

vec4 foo()
{
	vec4 color;
	if (!gl_HelperInvocation)
		color = textureLod(uSampler, vUV, 0.0);
	else
		color = vec4(1.0);
	return color;
}

void main()
{
	FragColor = foo();
}