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.GLSurfaceView;

import org.distorted.examples.R;

import org.distorted.library.effect.FragmentEffectBrightness;

import org.distorted.library.effect.MatrixEffectMove;

import org.distorted.library.effect.MatrixEffectScale;

import org.distorted.library.effect.VertexEffectScale;

import org.distorted.library.main.DistortedLibrary;

import org.distorted.library.main.DistortedEffects;

import org.distorted.library.main.DistortedFramebuffer;

import org.distorted.library.main.DistortedScreen;

import org.distorted.library.main.DistortedTexture;

import org.distorted.library.mesh.MeshQuad;

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, DistortedLibrary.ExceptionListener

{

   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_BRIGHTNESS=0.70f;  // Each next mirror 30% darker

   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_H    =0.12f;  // Each next mirror is moved to the left by 12% of

                                                        // the length of the previous one

   private static final float MIRROR_MOVE_V    =0.22f;  // Move the mirror up

   private final GLSurfaceView mView;

   private final DistortedEffects mEffectsMirror, mEffectsHead, mEffectsScreen;

   private final DistortedEffects mEffectsOffscreen1, mEffectsOffscreen2;

   private final DistortedScreen mScreen;

   private final MeshQuad mQuad1, mQuad2, mQuadMirror, mQuadHead;

   private final Static3D mHeadPosition, mScaleMirror, mMoveOffscreen2, mScaleHead;

   private final Static3D mScaleOffscreen1, mScaleOffscreen2;

   private DistortedTexture mTextureMirror, mTextureHead;

   private DistortedFramebuffer mOffScreen1, mOffScreen2;

   private int mX;

   private int mMirrorW, mMirrorH, mHeadW, mHeadH;

   private int mScreenW, mScreenH;

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

   MirrorRenderer(GLSurfaceView view)

      { 

      mView    = view;

      mScreen  = new DistortedScreen();

      mQuad1     = new MeshQuad();

      mQuad2     = new MeshQuad();

      mQuadMirror= new MeshQuad();

      mQuadHead  = new MeshQuad();

      mEffectsMirror    = new DistortedEffects();

      mEffectsHead      = new DistortedEffects();

      mEffectsOffscreen1= new DistortedEffects();

      mEffectsOffscreen2= new DistortedEffects();

      mEffectsScreen    = new DistortedEffects();

      mX = MirrorActivity.INIT_POSITION;

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

      mScaleMirror     = new Static3D(1,1,1);

      mMoveOffscreen2  = new Static3D(0,0,0);

      mScaleHead       = new Static3D(1,1,1);

      mScaleOffscreen1 = new Static3D(1,1,1);

      mScaleOffscreen2 = new Static3D(1,1,1);

      mEffectsMirror.apply( new VertexEffectScale(mScaleMirror));

      mEffectsScreen.apply( new VertexEffectScale(mScaleOffscreen1) );

      mEffectsOffscreen1.apply( new VertexEffectScale(mScaleOffscreen1) );

      mEffectsOffscreen1.apply( new MatrixEffectScale( new Static3D(MIRROR_SCALE,MIRROR_SCALE,MIRROR_SCALE)));

      mEffectsOffscreen2.apply( new VertexEffectScale(mScaleOffscreen2) );

      mEffectsOffscreen2.apply( new MatrixEffectMove(mMoveOffscreen2) );

      mEffectsHead.apply( new VertexEffectScale(mScaleHead) );

      mEffectsHead.apply( new MatrixEffectMove(mHeadPosition) );

      mEffectsOffscreen1.apply(new FragmentEffectBrightness(new Static1D(MIRROR_BRIGHTNESS)));

      }

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

   void setPosition(int pos)

      {

      mX = pos;

      float headWdivScreenW = mScreenW >0 ? (float)mHeadW/mScreenW : 0.0f;

      float left = headWdivScreenW -0.5f + MIRROR_MARGIN;

      float right= -left;

      mHeadPosition.set0( ((right-left)*(mX/100.0f) + left) * mScreenW );

      }

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

   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();

        int offscreen1W = mScreenW;

        int offscreen1H = mScreenH;

        int offscreen2W = (int)(MIRROR_SCALE*mScreenW);

        int offscreen2H = (int)(MIRROR_SCALE*mScreenH);

        mScaleOffscreen1.set(offscreen1W, offscreen1H, 0);

        mScaleOffscreen2.set(offscreen2W, offscreen2H, 0);

        mOffScreen1 = new DistortedFramebuffer( offscreen1W, offscreen1H, 1, DistortedFramebuffer.NO_DEPTH_NO_STENCIL );

        mOffScreen2 = new DistortedFramebuffer( offscreen2W, offscreen2H, 1, DistortedFramebuffer.NO_DEPTH_NO_STENCIL );

        float headScale = HEAD_SCALE *mScreenH;

        mScaleHead.set(headScale*mHeadW/mHeadH,headScale,0);

        mScaleMirror.set( mScreenW, mScreenH, 0);

        mMoveOffscreen2.set( (MIRROR_MOVE_H-0.5f+0.5f*MIRROR_SCALE)*mScreenW, (MIRROR_MOVE_V-0.5f+0.5f*MIRROR_SCALE)*mScreenH*mMirrorW/mMirrorH, 0);

        mHeadPosition.set1( (0.5f*HEAD_SCALE - 0.5f + MIRROR_MARGIN*mMirrorW/mMirrorH)*mScreenH );

        setPosition(mX);

        mOffScreen1.attach( mTextureMirror, mEffectsMirror    , mQuadMirror );

        mOffScreen1.attach( mOffScreen2   , mEffectsOffscreen2, mQuad2      );

        mOffScreen1.attach( mTextureHead  , mEffectsHead      , mQuadHead   );

        mOffScreen2.attach( mOffScreen1   , mEffectsOffscreen1, mQuad1      );

        mScreen.detachAll();

        mScreen.attach    ( mOffScreen1   , mEffectsScreen    , mQuad1      );

        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 ignored) { }

        }

      mMirrorW = bitmapM.getWidth();

      mMirrorH = bitmapM.getHeight();

      mHeadW   = bitmapH.getWidth();

      mHeadH   = bitmapH.getHeight();

      if( mTextureMirror==null ) mTextureMirror = new DistortedTexture();

      if( mTextureHead  ==null ) mTextureHead   = new DistortedTexture();

      mTextureMirror.setTexture(bitmapM);

      mTextureHead.setTexture(bitmapH);

      VertexEffectScale.enable();

      FragmentEffectBrightness.enable();

      DistortedLibrary.onSurfaceCreated(mView.getContext(), this);

      }

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

    public void distortedException(Exception ex)

      {

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

      }

}