physarum/vendor/gioui.org/shader/gio/zintersect.frag.0.glsl100es

#version 100
precision mediump float;
precision highp int;

uniform mediump sampler2D cover;

varying highp vec2 vUV;

void main()
{
    gl_FragData[0].x = abs(texture2D(cover, vUV).x);
}