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.DistortedScreen;

import org.distorted.library.MeshFlat;

import org.distorted.library.DistortedTexture;

import org.distorted.library.DistortedEffects;

import org.distorted.library.EffectNames;

import org.distorted.library.EffectTypes;

import org.distorted.library.type.Dynamic3D;

import org.distorted.library.type.Static3D;

import org.distorted.library.type.Static4D;

import org.distorted.library.message.EffectListener;

import org.distorted.library.message.EffectMessage;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLSurfaceView;

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

class ListenerRenderer implements GLSurfaceView.Renderer,EffectListener 

{

   private final int NUM_BUBBLES = 12;

   private GLSurfaceView mView;

   private DistortedEffects mEffects;

   private DistortedScreen mScreen;

   private DistortedTexture mTexture;

   private int bmpHeight, bmpWidth;

   private Random mRnd;

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

   ListenerRenderer(GLSurfaceView v)

      {

      DistortedEffects.setMaxVertex(NUM_BUBBLES);

      mView = v;

      mEffects = new DistortedEffects();

      mEffects.registerForMessages(this);

      mScreen = new DistortedScreen();

      mRnd = new Random(0);

      }

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

   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 

      Dynamic3D dDistort = new Dynamic3D(duration,1.0f);

      dDistort.add(new Static3D(0,0,     0));

      dDistort.add(new Static3D(0,0,height));

      return mEffects.distort(dDistort, new Static3D(pointx,pointy,0), new Static4D(0,0,radius,radius));

      }

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

// the library sending messages to us. This is running on a library 'MessageSender' thread.

   public void effectMessage(final EffectMessage em, final long effectID, final EffectNames effectName, final long objectID)

     {

     switch(em)

        {

        case EFFECT_REMOVED: randomizeNewBubble();

        default            : break;

        }

     }

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

    public void onDrawFrame(GL10 glUnused) 

      {

      mScreen.render( System.currentTimeMillis() );

      }

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

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

      { 

      mEffects.abortEffects(EffectTypes.MATRIX);

      if( (float)bmpHeight/bmpWidth > (float)height/width )

        {

        int w = (height*bmpWidth)/bmpHeight;

        float factor = (float)height/bmpHeight;

        mEffects.move( new Static3D((width-w)/2,0,0) );

        mEffects.scale(factor);

        }

      else

        {

        int h = (width*bmpHeight)/bmpWidth;

        float factor = (float)width/bmpWidth;

        mEffects.move( new Static3D(0,(height-h)/2,0) );

        mEffects.scale(factor);

        }

      mScreen.resize(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) { }

        }  

      bmpHeight = bitmap.getHeight();

      bmpWidth  = bitmap.getWidth();

      if( mTexture==null ) mTexture = new DistortedTexture(bmpWidth,bmpHeight);

      mTexture.setTexture(bitmap);

      mScreen.detachAll();

      mScreen.attach(mTexture,mEffects,new MeshFlat(50,50*bmpHeight/bmpWidth));

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

      DistortedEffects.enableEffect(EffectNames.DISTORT);

      try

        {

        Distorted.onCreate(mView.getContext());

        }

      catch(Exception ex)

        {

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

        }

      }

}