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.deform;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

import org.distorted.library.Distorted;

import org.distorted.library.DistortedBitmap;

import org.distorted.library.EffectTypes;

import org.distorted.library.type.Interpolator2D;

import org.distorted.library.type.Float3D;

import org.distorted.library.type.Float4D;

import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.graphics.Paint.Style;

import android.opengl.GLES20;

import android.opengl.GLSurfaceView;

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

class DeformRenderer implements GLSurfaceView.Renderer 

{

   public static final int MODE_DISTORT= 0;

   public static final int MODE_DEFORM = 1;

   public static final int MODE_SHEAR  = 2;

   private static final int NUM_VECTORS = 8;

   private static final int NUMLINES = 10;

   private static final int NUMFRAMES =10;

   private GLSurfaceView mView;

   private DistortedBitmap fps;

   private DistortedBitmap stretch;

   private Float3D touchPoint;

   private static Interpolator2D di;

   private static Float3D[] v;

   private static Float4D dr;

   private Canvas fpsCanvas;

   private Bitmap fpsBitmap, stretchBitmap;

   private int scrHeight, scrWidth;

   private Paint mPaint;

   private int fpsH, fpsW;

   private String fpsString = "";

   private long lastTime=0;

   private long[] durations;

   private int currDuration;

   private long shearID=0;

   private static int mMode = MODE_DISTORT;

   private static boolean bitmapCreated = false;

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

   public DeformRenderer(GLSurfaceView view) 

      { 

      mView = view;

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

      di = new Interpolator2D();

      di.setMode(Interpolator2D.MODE_PATH);

      di.setCount(0.5f);

      di.setDuration(NUM_VECTORS*500);

      v = new Float3D[NUM_VECTORS];

      for(int i=0; i<NUM_VECTORS; i++)

        {

        v[i] = new Float3D(0,0,0);  

        di.add(v[i]);

        }

      durations = new long[NUMFRAMES+1];

      currDuration = 0;

      for(int i=0; i<NUMFRAMES+1; i++)

        {

        durations[i]=0;   

        }

      }

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

   public static void setMode(int mode)

      {

      mMode = mode;  

      }

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

   public static void setRegionRadius(int r)

      {

      dr.set(0,0,r); 

      }

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

    public static void onPause()

      {

      bitmapCreated = false;  

      }

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

    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);

      long time = System.currentTimeMillis();

      stretch.draw(time);

      mPaint.setColor(0xffffffff);

      fpsCanvas.drawRect(0, 0, fpsW, fpsH, mPaint);

      mPaint.setColor(0xff000000);

      fpsCanvas.drawText(fpsString, fpsW/2, 5*fpsH/6, mPaint);

      fps.setBitmap(fpsBitmap);

      fps.draw(time);

      computeFPS(time);

      }

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

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

      { 

      scrHeight = height;

      scrWidth  = width;

      Distorted.onSurfaceChanged(width, height);

      if( bitmapCreated==false )

        {

        createBitmap(scrWidth/2,scrHeight/2);

        stretch.move(scrWidth/4,scrHeight/4,0);

        fps.move(5,5,0);

        bitmapCreated=true;

        }

      else

        {

        stretch.abortEffects(EffectTypes.VERTEX);

        stretch.abortEffects(EffectTypes.FRAGMENT);

        stretch.abortEffect(shearID);

        }

      }

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

    public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

      {  

      try

        {

        Distorted.onSurfaceCreated(mView.getContext());

        }

      catch(Exception ex)

        {

        android.util.Log.e("DeformRenderer", ex.toString() );

        }

      }

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

    private void createBitmap(int w, int h)

      {  

      Canvas stretchCanvas;   

      mPaint = new Paint();

      stretch = new DistortedBitmap(w,h, 50);   

      stretchBitmap = Bitmap.createBitmap(w,h, Bitmap.Config.ARGB_8888);

      stretchCanvas = new Canvas(stretchBitmap);

      fpsW = scrWidth/5;

      fpsH = fpsW/2;

      mPaint.setAntiAlias(true);

      mPaint.setTextAlign(Paint.Align.CENTER);

      mPaint.setTextSize(2*fpsH/3);

      mPaint.setColor(0xff008800);

      mPaint.setStyle(Style.FILL);

      stretchCanvas.drawRect(0, 0, w, h, mPaint);

      mPaint.setColor(0xffffffff);

      for(int i=0; i<=NUMLINES ; i++ )

        {

        stretchCanvas.drawRect(w*i/NUMLINES - 1,                0,  w*i/NUMLINES + 1,  h               , mPaint);

        stretchCanvas.drawRect(               0, h *i/NUMLINES -1,  w               ,  h*i/NUMLINES + 1, mPaint);  

        }

      touchPoint= new Float3D(0,0,0);

      fps = new DistortedBitmap( fpsW, fpsH, 2);

      fpsBitmap = Bitmap.createBitmap(fpsW,fpsH, Bitmap.Config.ARGB_8888);

      fpsCanvas = new Canvas(fpsBitmap);

      stretch.setBitmap(stretchBitmap);

      fps.setBitmap(fpsBitmap);

      }

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

    public void down(int x, int y)

      {

      stretch.abortEffects(EffectTypes.VERTEX);

      stretch.abortEffects(EffectTypes.FRAGMENT);

      stretch.abortEffect(shearID);

      int xt = x-scrWidth/4;

      int yt = y-scrHeight/4;

      if( xt<0 ) xt=0;

      if( xt>scrWidth/2 ) xt=scrWidth/2;

      if( yt<0 ) yt=0;

      if( yt>scrHeight/2 ) yt=scrHeight/2;

      touchPoint.set(xt,yt,0);

      v[0].set(0,0,0);

      switch(mMode)

        {

        case MODE_DISTORT: stretch.distort(v[0], dr, touchPoint, 0, 0.5f);

                           break;

        case MODE_DEFORM : stretch.deform( v[0], touchPoint);

                           break;

        case MODE_SHEAR  : shearID = stretch.shear(touchPoint,v[0]);

                           break;

        }                   

      }

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

    public void move(int x, int y)

      {

      float fx = x;

      float fy = y;

      if( mMode==MODE_SHEAR )

        {

        fx /= (scrWidth/2);

        fy /= (scrHeight/2);

        }

      v[0].set(fx,fy);

      }

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

    public void up()

      {

      stretch.abortEffects(EffectTypes.VERTEX);

      stretch.abortEffects(EffectTypes.FRAGMENT);

      stretch.abortEffect(shearID);

      float damp = -0.65f;

      for(int i=1; i<NUM_VECTORS-1; i++)

        {

        v[i].set( v[i-1].getX()*damp, v[i-1].getY()*damp );

        }

      v[NUM_VECTORS-1].set(0,0);

      switch(mMode)

        {

        case MODE_DISTORT: stretch.distort(di, dr, touchPoint);

                           break;

        case MODE_DEFORM : stretch.deform( di, touchPoint);

                           break;

        case MODE_SHEAR  : shearID = stretch.shear(touchPoint,di); 

                           break;

        }      

      }

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

    private void computeFPS(long currentTime)

      {

      if( lastTime!=0 )

        {

        currDuration++;

        if( currDuration>=NUMFRAMES ) currDuration = 0;  

        durations[NUMFRAMES] += ((currentTime-lastTime)-durations[currDuration]);

        durations[currDuration] = currentTime-lastTime;

        fpsString = "" + ((int)(10000.0f*NUMFRAMES/durations[NUMFRAMES]))/10.0f;

        }

      lastTime = currentTime;   

      }

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

}