source: data/branches/Shader_HS18/programs/Example/GLSL150/PosterizeFP.glsl @ 12083

#version 150

uniform sampler2D RT;
in vec2 oUv0;
out vec4 fragColour;

void main()
{
        float nColors = 8.0;
        float gamma = 0.6;

        vec4 texCol = vec4(texture(RT, oUv0));
        vec3 tc = texCol.xyz;
        tc = pow(tc, vec3(gamma));
        tc = tc * nColors;
        tc = floor(tc);
        tc = tc / nColors;
        tc = pow(tc, vec3(1.0/gamma));
        fragColour = vec4(tc, texCol.w);
}