Android Open Source - FxCameraApp Gl Haze Shader

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License

The source code is released under:

MIT License

Java Source Code

package com.af.experiments.FxCameraApp.shaders;
/*w  ww. ja v a  2  s.c o  m*/
import static android.opengl.GLES20.glUniform1f;

public class GlHazeShader extends GlShader {

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

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

      "void main() {" +
        // todo reconsider precision modifiers
        "highp vec4 color = vec4(1.0);" +  // todo reimplement as a parameter

        "highp float  d = vTextureCoord.y * slope  +  distance;" +

        "highp vec4 c = texture2D(sTexture, vTextureCoord);" +
        "c = (c - d * color) / (1.0 -d);" +
        "gl_FragColor = c;" +  // consider using premultiply(c);
      "}";

  private float mDistance = 0.2f;
  private float mSlope = 0.0f;

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


  public float getDistance() {
    return mDistance;
  }

  public void setDistance(final float distance) {
    mDistance = distance;
  }

  public float getSlope() {
    return mSlope;
  }

  public void setSlope(final float slope) {
    mSlope = slope;
  }


  @Override
  public void onDraw() {
    glUniform1f(getHandle("distance"), mDistance);
    glUniform1f(getHandle("slope"), mSlope);
  }

}

Java Source Code List

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