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examples / src / main / java / org / distorted / examples / mirror / MirrorRenderer.java @ f3ca895f

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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2016 Leszek Koltunski                                                               //
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//                                                                                               //
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// This file is part of Distorted.                                                               //
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//                                                                                               //
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// Distorted is free software: you can redistribute it and/or modify                             //
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// it under the terms of the GNU General Public License as published by                          //
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// the Free Software Foundation, either version 2 of the License, or                             //
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// (at your option) any later version.                                                           //
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//                                                                                               //
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// Distorted is distributed in the hope that it will be useful,                                  //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of                                //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                                 //
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// GNU General Public License for more details.                                                  //
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//                                                                                               //
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// You should have received a copy of the GNU General Public License                             //
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// along with Distorted.  If not, see <http://www.gnu.org/licenses/>.                            //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.examples.mirror;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.opengl.GLSurfaceView;
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import org.distorted.examples.R;
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import org.distorted.library.effect.FragmentEffectBrightness;
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import org.distorted.library.effect.MatrixEffectMove;
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import org.distorted.library.effect.MatrixEffectScale;
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import org.distorted.library.main.DistortedLibrary;
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import org.distorted.library.main.DistortedEffects;
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import org.distorted.library.main.DistortedFramebuffer;
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import org.distorted.library.main.DistortedScreen;
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import org.distorted.library.main.DistortedTexture;
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import org.distorted.library.mesh.MeshRectangles;
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import org.distorted.library.type.Static1D;
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import org.distorted.library.type.Static3D;
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import java.io.IOException;
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import java.io.InputStream;
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import javax.microedition.khronos.egl.EGLConfig;
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import javax.microedition.khronos.opengles.GL10;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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class MirrorRenderer implements GLSurfaceView.Renderer
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{
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   private static final float MIRROR_SCALE     =0.70f;  // each next mirror will be 70% of the size or the previous
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   private static final float HEAD_SCALE       =0.30f;  // Head's height will be 30% of the height of the mirror
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   private static final float MIRROR_BRIGHTNESS=0.70f;  // Each next mirror 30% darker
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   private static final float MIRROR_MARGIN    =0.11f;  // The frame of the mirror takes up 11% of its width
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   private static final float MIRROR_MOVE_H    =0.12f;  // Each next mirror is moved to the left by 12% of
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                                                        // the length of the previous one
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   private static final float MIRROR_MOVE_V    =0.22f;  // Move the mirror up
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   private GLSurfaceView mView;
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   private DistortedEffects mEffectsMirror, mEffectsHead, mEffectsNull;
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   private DistortedEffects mEffectsOffscreen1, mEffectsOffscreen2;
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   private DistortedTexture mTextureMirror, mTextureHead;
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   private DistortedFramebuffer mOffScreen1, mOffScreen2;
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   private DistortedScreen mScreen;
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   private MeshRectangles mQuad;
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   private Static3D mHeadPosition, mScaleMirror, mMoveOffscreen2, mScaleHead;
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   private int mX;
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   private int mMirrorW, mMirrorH, mHeadW, mHeadH;
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   private int mScreenW, mScreenH;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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   MirrorRenderer(GLSurfaceView view)
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      { 
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      mView    = view;
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      mQuad    = new MeshRectangles(1,1);
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      mScreen  = new DistortedScreen();
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      mEffectsMirror    = new DistortedEffects();
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      mEffectsHead      = new DistortedEffects();
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      mEffectsOffscreen1= new DistortedEffects();
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      mEffectsOffscreen2= new DistortedEffects();
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      mEffectsNull      = new DistortedEffects();
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      mX = MirrorActivity.INIT_POSITION;
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      mHeadPosition    = new Static3D(0,0,0);
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      mScaleMirror     = new Static3D(1,1,1);
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      mMoveOffscreen2  = new Static3D(0,0,0);
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      mScaleHead       = new Static3D(1,1,1);
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      mEffectsMirror.apply( new MatrixEffectScale(mScaleMirror));
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      mEffectsOffscreen1.apply( new MatrixEffectScale( new Static3D(MIRROR_SCALE,MIRROR_SCALE,MIRROR_SCALE)));
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      mEffectsOffscreen2.apply( new MatrixEffectMove(mMoveOffscreen2) );
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      mEffectsHead.apply( new MatrixEffectScale(mScaleHead) );
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      mEffectsHead.apply( new MatrixEffectMove(mHeadPosition) );
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      mEffectsOffscreen1.apply(new FragmentEffectBrightness(new Static1D(MIRROR_BRIGHTNESS)));
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      }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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   void setPosition(int pos)
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      {
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      mX = pos;
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      float headW = (HEAD_SCALE *mScreenH* mHeadW) / (mScreenW* mHeadH);
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      mHeadPosition.set0(mX*(1.0f-2*MIRROR_MARGIN-headW)*mScreenW / 100.0f + MIRROR_MARGIN*mScreenW);
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      }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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   public void onResume()
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     {
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     mScreenW = 0;
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     mScreenH = 0;
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     }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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   public void onDrawFrame(GL10 glUnused) 
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      {
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      long time = System.currentTimeMillis();
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      mOffScreen1.render(time);
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      mOffScreen2.render(time);
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      mScreen.render(time);
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      }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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   public void onSurfaceChanged(GL10 glUnused, int width, int height) 
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      {
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      if( mScreenW!=width || mScreenH!=height)
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        {
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        mScreenW = width;
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        mScreenH = height;
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        if( mOffScreen1!=null ) mOffScreen1.markForDeletion();
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        if( mOffScreen2!=null ) mOffScreen2.markForDeletion();
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        mOffScreen1 = new DistortedFramebuffer(                     mScreenW,                     mScreenH, 1, DistortedFramebuffer.NO_DEPTH_NO_STENCIL );
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        mOffScreen2 = new DistortedFramebuffer( (int)(MIRROR_SCALE*mScreenW), (int)(MIRROR_SCALE*mScreenH), 1, DistortedFramebuffer.NO_DEPTH_NO_STENCIL );
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        mScaleMirror.set( (float)mScreenW/mMirrorW, (float)mScreenH/mMirrorH, 1.0f);
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        mMoveOffscreen2.set( MIRROR_MOVE_H*mScreenW, MIRROR_MOVE_V*mScreenH*mMirrorW/mMirrorH, 0);
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        float headScale = HEAD_SCALE *mScreenH/ mHeadH;
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        mScaleHead.set(headScale,headScale,headScale);
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        mHeadPosition.set1( mScreenH*MIRROR_MARGIN*mMirrorW/mMirrorH );
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        setPosition(mX);
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        mOffScreen1.attach( mTextureMirror, mEffectsMirror    , mQuad );
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        mOffScreen1.attach( mOffScreen2   , mEffectsOffscreen2, mQuad );
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        mOffScreen1.attach( mTextureHead  , mEffectsHead      , mQuad );
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        mOffScreen2.attach( mOffScreen1   , mEffectsOffscreen1, mQuad );
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        mScreen.detachAll();
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        mScreen.attach    ( mOffScreen1   , mEffectsNull      , mQuad );
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        mScreen.resize(mScreenW,mScreenH);
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        }
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      }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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   public void onSurfaceCreated(GL10 glUnused, EGLConfig config) 
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      {
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      InputStream isM = mView.getContext().getResources().openRawResource(R.raw.mirror);
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      InputStream isH = mView.getContext().getResources().openRawResource(R.raw.messi);
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      Bitmap bitmapM, bitmapH;
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      try
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        {
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        bitmapM = BitmapFactory.decodeStream(isM);
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        bitmapH = BitmapFactory.decodeStream(isH);
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        }
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      finally
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        {
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        try
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          {
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          isM.close();
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          isH.close();
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          }
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        catch(IOException e) { }
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        }
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      mMirrorW = bitmapM.getWidth();
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      mMirrorH = bitmapM.getHeight();
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      mHeadW   = bitmapH.getWidth();
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      mHeadH   = bitmapH.getHeight();
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      if( mTextureMirror==null ) mTextureMirror = new DistortedTexture(mMirrorW,mMirrorH);
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      if( mTextureHead  ==null ) mTextureHead   = new DistortedTexture(mHeadW, mHeadH);
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      mTextureMirror.setTexture(bitmapM);
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      mTextureHead.setTexture(bitmapH);
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      FragmentEffectBrightness.enable();
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      try
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        {
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        DistortedLibrary.onCreate(mView.getContext());
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        }
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      catch(Exception ex)
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        {
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        android.util.Log.e("Mirror", ex.getMessage() );
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        }
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      }
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}