// Invert Colors
#version 300 es
precision highp float;
in vec2 v_texcoord;
uniform sampler2D tex;
out vec4 fragColor;
void main()
{
vec4 pixColor = texture(tex, v_texcoord);
fragColor = vec4(1.0 - pixColor.r, 1.0 - pixColor.g, 1.0 - pixColor.b, pixColor.a);
}