Android Open Source - FxCameraApp Gl Pixellate Shader

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Back to project page FxCameraApp.

License

The source code is released under:

MIT License

Java Source Code

package com.af.experiments.FxCameraApp.shaders;
/*  w  w  w.jav  a2s . c om*/
import static android.opengl.GLES20.glUniform1f;

public class GlPixellateShader extends GlShader {

  private static final String FRAGMENT_SHADER =
      "precision mediump float;\n" +  // ?????????????????
      "varying vec2 vTextureCoord;\n" +
      "uniform lowp sampler2D sTexture;\n" +

      "uniform highp float fractionalWidthOfPixel;\n" +
      "uniform highp float aspectRatio;\n" +

      "void main() {\n" +
        "highp vec2 sampleDivisor = vec2(fractionalWidthOfPixel, fractionalWidthOfPixel / aspectRatio);\n" +
        "highp vec2 samplePos = vTextureCoord - mod(vTextureCoord, sampleDivisor) + 0.5 * sampleDivisor;\n" +
        "gl_FragColor = texture2D(sTexture, samplePos);\n" +
      "}\n";

  private float mFractionalWidthOfPixel = 1f / 80f;//0.013f;
  private float mAspectRatio = 1.0f;

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



  protected String mShaderName = "pixelate";

  public String getName() {
    return mShaderName;
  }
  public float getFractionalWidthOfPixel() {
    return mFractionalWidthOfPixel;
  }

  public void setFractionalWidthOfPixel(final float fractionalWidthOfPixel) {
    mFractionalWidthOfPixel = fractionalWidthOfPixel;
  }

  public float getAspectRatio() {
    return mAspectRatio;
  }

  public void setAspectRatio(final float aspectRatio) {
    mAspectRatio = aspectRatio;
  }

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

  @Override
  protected void onDraw() {
    glUniform1f(getHandle("fractionalWidthOfPixel"), mFractionalWidthOfPixel);
    glUniform1f(getHandle("aspectRatio"), mAspectRatio);
  }

}

Java Source Code List

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