Android Open Source - FxCameraApp Gl Posterize Shader

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License

The source code is released under:

MIT License

Java Source Code

package com.af.experiments.FxCameraApp.shaders;
/*from ww  w .j  a  v  a 2 s  . c om*/
import static android.opengl.GLES20.glUniform1f;

public class GlPosterizeShader extends GlShader {

  private static final String FRAGMENT_SHADER =
      "precision mediump float;" +  // ?????????????????

      "varying vec2 vTextureCoord;" +
      "uniform lowp sampler2D sTexture;" +
      "uniform highp float colorLevel;" +

      "void main() {" +
        "highp vec4 color = texture2D(sTexture, vTextureCoord);" +
        "gl_FragColor = floor((color * colorLevel) + vec4(0.5)) / colorLevel;" +
      "}";

  private float mColorLevel = 5f;

  protected String mShaderName = "Posterize";

  public String getName() {
    return mShaderName;
  }

  public GlPosterizeShader() {
    super(DEFAULT_VERTEX_SHADER, FRAGMENT_SHADER);
  }


  public float getColorLevel() {
    return mColorLevel;
  }

  public void setColorLevel(final float colorLevel) {
    mColorLevel = colorLevel;
  }

  //////////////////////////////////////////////////////////////////////////

  @Override
  public void onDraw() {
    glUniform1f(getHandle("colorLevel"), mColorLevel);
  }

}

Java Source Code List

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