Distorted Android

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// 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.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.DistortedScreen;

import org.distorted.library.DistortedTexture;

import org.distorted.library.EffectNames;

import org.distorted.library.MeshFlat;

import org.distorted.library.type.Dynamic3D;

import org.distorted.library.type.Static1D;

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       =0.40f;  // Head's height will be 30% of the height of the mirror

   private static final float MIRROR_BRIGHTNESS=0.70f;  // Each next mirror 30% darker

   private static final float MIRROR_MARGIN    =0.09f;  // The frame of the mirror takes up 9% 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 mEffectsHead, mEffectsNull, mEffectsOffscreen1, mEffectsOffscreen2;

   private DistortedTexture mTextureMirror, mTextureHead;

   private DistortedFramebuffer mOffScreen1, mOffScreen2;

   private DistortedScreen mScreen;

   private MeshFlat mQuad;

   private Static3D mHeadPosition;

   private Dynamic3D mHeadDyn;

   private int mX;

   private int mHeadW, mHeadH;

   private int mScreenW, mScreenH;

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

   MirrorRenderer(GLSurfaceView view)

      { 

      mView    = view;

      mQuad    = new MeshFlat(1,1);

      mScreen  = new DistortedScreen();

      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;

      mHeadPosition.set1( (mX/50.0f-1)*(0.5f-MIRROR_MARGIN-HEAD_SCALE/2) );

      }

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

   public void onResume()

     {

     mScreenW = 0;

     mScreenH = 0;

     }

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

   public void onDrawFrame(GL10 glUnused) 

      {

      long time = System.currentTimeMillis();

      mOffScreen1.render(time);

      mOffScreen2.render(time);

      mScreen.render(time);

      }

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

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

      {

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

        {

        mScreenW = width;

        mScreenH = height;

        if( mOffScreen1!=null ) mOffScreen1.markForDeletion();

        if( mOffScreen2!=null ) mOffScreen2.markForDeletion();

        mOffScreen1 = new DistortedFramebuffer(mScreenW,mScreenH);

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

        mEffectsHead.abortAllEffects();

        mEffectsOffscreen1.abortAllEffects();

        mEffectsOffscreen2.abortAllEffects();

        mEffectsOffscreen1.brightness(new Static1D(MIRROR_BRIGHTNESS));

        mEffectsOffscreen2.move( new Static3D( MIRROR_MOVE-0.5f+MIRROR_SCALE/2, MIRROR_MOVE-0.5f+MIRROR_SCALE/2, 0) );

        mEffectsOffscreen2.scale( new Static3D( MIRROR_SCALE, MIRROR_SCALE, 1) );

        mEffectsHead.move(mHeadDyn);

        float qx = mScreenW/ mHeadW;

        float qy = mScreenH/ mHeadH;

        if( qx<qy )

          {

          mEffectsHead.scale(new Static3D(HEAD_SCALE, HEAD_SCALE*qx/qy, 1) );

          mHeadPosition.set2(0.5f-MIRROR_MARGIN-(HEAD_SCALE/2)*qx/qy);

          }

        else

          {

          mEffectsHead.scale( new Static3D(HEAD_SCALE*qy/qx, HEAD_SCALE, 1) );

          mHeadPosition.set2(0.5f-MIRROR_MARGIN-HEAD_SCALE/2);

          }

        setPosition(mX);

        mOffScreen1.attach( mTextureMirror, mEffectsNull      , mQuad );

        mOffScreen1.attach( mOffScreen2   , mEffectsOffscreen2, mQuad );

        mOffScreen1.attach( mTextureHead  , mEffectsHead      , mQuad );

        mOffScreen2.attach( mOffScreen1   , mEffectsOffscreen1, mQuad );

        mScreen.detachAll();

        mScreen.attach    ( mOffScreen1   , mEffectsNull     , mQuad );

        mScreen.resize(mScreenW,mScreenH);

        }

      }

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

   public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 

      {

      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) { }

        }

      mHeadW = bitmapH.getWidth();

      mHeadH = bitmapH.getHeight();

      if( mTextureMirror==null ) mTextureMirror = new DistortedTexture(bitmapM.getWidth(),bitmapM.getHeight());

      if( mTextureHead  ==null ) mTextureHead   = new DistortedTexture(mHeadW, mHeadH);

      mTextureMirror.setTexture(bitmapM);

      mTextureHead.setTexture(bitmapH);

      DistortedEffects.enableEffect(EffectNames.BRIGHTNESS);

      try

        {

        Distorted.onCreate(mView.getContext());

        }

      catch(Exception ex)

        {

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

        }

      }

}