Android Open Source - FxCameraApp Gl Polar 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  . j a  v a2s  . c  o m
import static android.opengl.GLES20.glUniform2f;

public class GlPolarPixellateShader extends GlShader {

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

      "varying highp vec2 vTextureCoord;" +
      "uniform lowp sampler2D sTexture;" +
      "uniform highp vec2 center;" +
      "uniform highp vec2 pixelSize;" +

      "void main() {" +
        "highp vec2 normCoord = 2.0 * vTextureCoord - 1.0;" +
        "highp vec2 normCenter = 2.0 * center - 1.0;" +

        "normCoord -= normCenter;" +

        "highp float r = length(normCoord);" +  // to polar coords
        "highp float phi = atan(normCoord.y, normCoord.x);" +  // to polar coords

        "r = r - mod(r, pixelSize.x) + 0.03;" +
        "phi = phi - mod(phi, pixelSize.y);" +

        "normCoord.x = r * cos(phi);" +
        "normCoord.y = r * sin(phi);" +

        "normCoord += normCenter;" +

        "mediump vec2 textureCoordinateToUse = normCoord / 2.0 + 0.5;" +

        "gl_FragColor = texture2D(sTexture, textureCoordinateToUse);" +
      "}";

  private float mCenterX = 0.5f;
  private float mCenterY = 0.5f;
  private float mPixelWidth = 0.05f;
  private float mPixelHeight = 0.05f;

  public GlPolarPixellateShader() {
    super(DEFAULT_VERTEX_SHADER, FRAGMENT_SHADER);
  }
  protected String mShaderName = "polar pixelate";

  public String getName() {
    return mShaderName;
  }

  public float getCenterX() {
    return mCenterX;
  }

  public void setCenterX(final float centerX) {
    mCenterX = centerX;
  }

  public float getCenterY() {
    return mCenterY;
  }

  public void setCenterY(final float centerY) {
    mCenterY = centerY;
  }

  public float getPixelWidth() {
    return mPixelWidth;
  }

  public void setPixelWidth(final float pixelWidth) {
    mPixelWidth = pixelWidth;
  }

  public float getPixelHeight() {
    return mPixelHeight;
  }

  public void setPixelHeight(final float pixelHeight) {
    mPixelHeight = pixelHeight;
  }

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

  @Override
  public void onDraw() {
    glUniform2f(getHandle("center"), mCenterX, mCenterY);
    glUniform2f(getHandle("pixelSize"), mPixelWidth, mPixelHeight);
  }

}

Java Source Code List

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