#version 330 core

uniform sampler2D u_tex0;
layout (location = 0) out vec4 io_color;

void main()
{
	vec2 q = gl_FragCoord.xy * 0.2;
	ivec2 p = ivec2(int(q[0]), int(q[1]));

    float value = texelFetch(u_tex0, p, 0).r;
    value = (value - 0.99) * 100;
    io_color = vec4(value, value, value, 1);
}