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.mirror;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLES20;

import android.opengl.GLSurfaceView;

import org.distorted.examples.R;

import org.distorted.library.Distorted;

import org.distorted.library.DistortedEffects;

import org.distorted.library.DistortedFramebuffer;

import org.distorted.library.DistortedTexture;

import org.distorted.library.GridFlat;

import org.distorted.library.type.Dynamic3D;

import org.distorted.library.type.Static3D;

import java.io.IOException;

import java.io.InputStream;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

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

class MirrorRenderer implements GLSurfaceView.Renderer

{

   private static final float MIRROR_SCALE = 0.70f;  // each next mirror will be 70% of the size or the previous

   private static final float HEAD_SCALE   = 0.30f;  // Head's height will be 30% of the height of the mirror

   private static final float MIRROR_MARGIN= 0.11f;  // The frame of the mirror takes up 11% of its width

   private static final float MIRROR_MOVE  = 0.12f;  // Each next mirror is moved to the right by 12% of

                                                     // the length of the previous one

   private GLSurfaceView mView;

   private DistortedEffects mEffectsMirror, mEffectsHead, mEffectsNull;

   private DistortedEffects mEffectsOffscreen1, mEffectsOffscreen2;

   private DistortedTexture mTextureMirror, mTextureHead;

   private DistortedFramebuffer mScreen, mOffScreen1, mOffScreen2;

   private GridFlat mQuad;

   private Static3D mHeadPosition;

   private Dynamic3D mHeadDyn;

   private int mX;

   private int mMirrorW, mMirrorH, mHeadW, mHeadH;

   private int mScreenW, mScreenH;

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

   MirrorRenderer(GLSurfaceView view)

      { 

      mView    = view;

      mQuad    = new GridFlat(1,1);

      mScreen  = new DistortedFramebuffer(0);

      mEffectsMirror    = new DistortedEffects();

      mEffectsHead      = new DistortedEffects();

      mEffectsOffscreen1= new DistortedEffects();

      mEffectsOffscreen2= new DistortedEffects();

      mEffectsNull      = new DistortedEffects();

      mX = MirrorActivity.INIT_POSITION;

      mHeadPosition = new Static3D(0,0,0);

      mHeadDyn = new Dynamic3D();

      mHeadDyn.add(mHeadPosition);

      }

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

   void setPosition(int pos)

      {

      mX = pos;

      float headW = (HEAD_SCALE *mScreenH* mHeadW) / (mScreenW* mHeadH);

      mHeadPosition.set1(mX*(1.0f-2*MIRROR_MARGIN-headW)*mScreenW / 100.0f + MIRROR_MARGIN*mScreenW);

      }

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

   public void onResume()

     {

     mScreenW = 0;

     mScreenH = 0;

     }

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

   public void onDrawFrame(GL10 glUnused) 

      {

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

      long time = System.currentTimeMillis();

      mOffScreen1.renderTo( mTextureMirror, mQuad, mEffectsMirror    , time );

      mOffScreen1.renderTo( mOffScreen2   , mQuad, mEffectsOffscreen2, time );

      mOffScreen1.renderTo( mTextureHead  , mQuad, mEffectsHead      , time );

      mOffScreen2.renderTo( mOffScreen1   , mQuad, mEffectsOffscreen1, time );

      mScreen.renderTo    ( mOffScreen1   , mQuad, mEffectsNull      , time );

      }

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

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

      {

      if( mScreenW!=width || mScreenH!=height)

        {

        mScreenW = width;

        mScreenH = height;

        mOffScreen1 = new DistortedFramebuffer(mScreenW,mScreenH);

        mOffScreen2 = new DistortedFramebuffer( (int)(MIRROR_SCALE*mScreenW), (int)(MIRROR_SCALE*mScreenH) );

        mEffectsHead.abortAllEffects();

        mEffectsMirror.abortAllEffects();

        mEffectsOffscreen1.abortAllEffects();

        mEffectsOffscreen2.abortAllEffects();

        mEffectsMirror.scale( new Static3D( (float)mScreenW/mMirrorW, (float)mScreenH/mMirrorH, 1.0f) );

        mEffectsOffscreen1.scale(MIRROR_SCALE);

        mEffectsOffscreen2.move( new Static3D( MIRROR_MOVE*mScreenW, MIRROR_MOVE*mScreenH*mMirrorW/mMirrorH, 0) );

        mEffectsHead.move(mHeadDyn);

        float headScale = HEAD_SCALE *mScreenH/ mHeadH;

        mEffectsHead.scale(headScale);

        mHeadPosition.set2( mScreenH*(1.0f-MIRROR_MARGIN*mMirrorW/mMirrorH) - headScale* mHeadH);

        setPosition(mX);

        mScreen.resize(mScreenW,mScreenH);

        }

      }

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

   public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

      {

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

      InputStream isM = mView.getContext().getResources().openRawResource(R.raw.mirror);

      InputStream isH = mView.getContext().getResources().openRawResource(R.raw.messi);

      Bitmap bitmapM, bitmapH;

      try

        {

        bitmapM = BitmapFactory.decodeStream(isM);

        bitmapH = BitmapFactory.decodeStream(isH);

        }

      finally

        {

        try

          {

          isM.close();

          isH.close();

          }

        catch(IOException e) { }

        }

      mMirrorW = bitmapM.getWidth();

      mMirrorH = bitmapM.getHeight();

      mHeadW   = bitmapH.getWidth();

      mHeadH   = bitmapH.getHeight();

      mTextureMirror = new DistortedTexture(mMirrorW,mMirrorH);

      mTextureHead   = new DistortedTexture(mHeadW, mHeadH);

      mTextureMirror.setTexture(bitmapM);

      mTextureHead.setTexture(bitmapH);

      try

        {

        Distorted.onSurfaceCreated(mView.getContext());

        }

      catch(Exception ex)

        {

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

        }

      }

}