PosterizeEffect.java

package com.sherazkhilji.videffects;

import android.opengl.GLSurfaceView;

import com.sherazkhilji.videffects.interfaces.ShaderInterface;


/**
 * Applies Posterization effect to video.
 *
 * @author sheraz.khilji
 */
public class PosterizeEffect implements ShaderInterface {

    @Override
    public String getShader(GLSurfaceView mGlSurfaceView) {
        return "#extension GL_OES_EGL_image_external : require\n"
                + "precision mediump float;\n"
                + "uniform samplerExternalOES sTexture;\n"
                + "varying vec2 vTextureCoord;\n" + "void main() {\n"
                + "  vec4 color = texture2D(sTexture, vTextureCoord);\n"
                + "  vec3 pcolor;\n"
                + "  pcolor.r = (color.r >= 0.5) ? 0.75 : 0.25;\n"
                + "  pcolor.g = (color.g >= 0.5) ? 0.75 : 0.25;\n"
                + "  pcolor.b = (color.b >= 0.5) ? 0.75 : 0.25;\n"
                + "  gl_FragColor = vec4(pcolor, color.a);\n" + "}\n";

    }
}