Distorted Android

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

// Copyright 2016 Leszek Koltunski                                                               //

//                                                                                               //

// This file is part of Distorted.                                                               //

//                                                                                               //

// Distorted is free software: you can redistribute it and/or modify                             //

// it under the terms of the GNU General Public License as published by                          //

// the Free Software Foundation, either version 2 of the License, or                             //

// (at your option) any later version.                                                           //

//                                                                                               //

// Distorted is distributed in the hope that it will be useful,                                  //

// but WITHOUT ANY WARRANTY; without even the implied warranty of                                //

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                                 //

// GNU General Public License for more details.                                                  //

//                                                                                               //

// You should have received a copy of the GNU General Public License                             //

// along with Distorted.  If not, see <http://www.gnu.org/licenses/>.                            //

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

package org.distorted.examples.listener;

import java.io.IOException;

import java.io.InputStream;

import java.util.Random;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

import org.distorted.examples.R;

import org.distorted.library.Distorted;

import org.distorted.library.DistortedBitmap;

import org.distorted.library.EffectTypes;

import org.distorted.library.type.Float2D;

import org.distorted.library.type.Float3D;

import org.distorted.library.type.Float4D;

import org.distorted.library.message.EffectListener;

import org.distorted.library.message.EffectMessage;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLES20;

import android.opengl.GLSurfaceView;

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

class ListenerRenderer implements GLSurfaceView.Renderer,EffectListener 

{

   private GLSurfaceView mView;

   private DistortedBitmap water;

   private int bmpHeight, bmpWidth;

   private Random mRnd;

   private final int NUM_BUBBLES = 12;

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

   public ListenerRenderer(GLSurfaceView v) 

      {

      Distorted.setMaxVertex(NUM_BUBBLES);   

      mView = v;

      }

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

   private long randomizeNewBubble()

      {

      int radius   = (int)(( 0.10f + 0.70f*mRnd.nextFloat())*bmpWidth);           // pop up a bubble of size (radius,height)

      int height   = (int)((-0.10f + 0.20f*mRnd.nextFloat())*bmpWidth);           // 

      int pointx   = mRnd.nextInt( (int)(0.8f*bmpWidth ))+ (int)(0.1f*bmpWidth ); // at a random place on the bitmap (but not near the edge)

      int pointy   = mRnd.nextInt( (int)(0.8f*bmpHeight))+ (int)(0.1f*bmpHeight); // 

      int duration = 1000 + mRnd.nextInt(3000);                                   // for anytime from 3 to 4 seconds 

      Float3D dp3d = new Float3D(0,0,height);

      Float2D dp2d = new Float2D(pointx,pointy);

      Float4D  dr  = new Float4D(0,0,radius,radius);

      return water.distort(dp3d, dr, dp2d, duration, 1.0f);

      }

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

// the library sending messages to us

   public void effectMessage(final EffectMessage em, final long effectID, final int effectName, final long bitmapID, final String message)

     {

     switch(em)

        {

        case EFFECT_REMOVED: randomizeNewBubble();

        default            : break;

        }

     }

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

    public void onDrawFrame(GL10 glUnused) 

      {

      GLES20.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

      GLES20.glClear( GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);

      water.draw(System.currentTimeMillis());

      }

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

    public void onSurfaceChanged(GL10 glUnused, int width, int height) 

      { 

      water.abortEffects(EffectTypes.MATRIX);

      if( bmpHeight/bmpWidth > height/width )

        {

        int w = (height*bmpWidth)/bmpHeight;

        water.move((width-w)/2 ,0, 0);

        water.scale((float)height/bmpHeight);

        }

      else

        {

        int h = (width*bmpHeight)/bmpWidth;

        water.move(0 ,(height-h)/2, 0);

        water.scale((float)width/bmpWidth);

        }

      Distorted.onSurfaceChanged(width, height); 

      }

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

    public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

      {

      InputStream is = mView.getContext().getResources().openRawResource(R.raw.water);

      Bitmap bitmap;

      try 

        {

        bitmap = BitmapFactory.decodeStream(is);

        } 

      finally 

        {

        try 

          {

          is.close();

          } 

        catch(IOException e) { }

        }  

      mRnd = new Random(0);

      bmpHeight = bitmap.getHeight();

      bmpWidth  = bitmap.getWidth();

      water = new DistortedBitmap(bitmap, 50);

      water.addEventListener(this);

      for(int i=0; i<NUM_BUBBLES; i++) randomizeNewBubble();

      try

        {

        Distorted.onSurfaceCreated(mView.getContext());

        }

      catch(Exception ex)

        {

        android.util.Log.e("Renderer", ex.getMessage() );

        }

      }

}