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.glow;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLSurfaceView;

import org.distorted.examples.R;

import org.distorted.library.effect.MatrixEffectMove;

import org.distorted.library.effect.MatrixEffectScale;

import org.distorted.library.effect.PostprocessEffectGlow;

import org.distorted.library.main.Distorted;

import org.distorted.library.main.DistortedEffects;

import org.distorted.library.main.DistortedScreen;

import org.distorted.library.main.DistortedTexture;

import org.distorted.library.main.MeshFlat;

import org.distorted.library.type.Static1D;

import org.distorted.library.type.Static3D;

import org.distorted.library.type.Static4D;

import java.io.IOException;

import java.io.InputStream;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

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

class GlowRenderer implements GLSurfaceView.Renderer

{

   private static final int LEAF_SIZE = 100;

   private GLSurfaceView mView;

   private DistortedTexture mLeaf;

   private DistortedScreen mScreen;

   private int mRootW, mRootH;

   private Static3D mMove, mScale;

   private Static1D mRadius;

   private Static4D mColor;

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

   GlowRenderer(GLSurfaceView v)

      {     

      mView = v;

      mRootW = LEAF_SIZE;

      mRootH = LEAF_SIZE;

      mLeaf  = new DistortedTexture(LEAF_SIZE,LEAF_SIZE);

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

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

      mRadius= new Static1D(25);

      mColor = new Static4D(1.0f,0.0f,0.0f,0.5f); // half-transparent red

      DistortedEffects effects = new DistortedEffects();

      effects.apply(new MatrixEffectMove(mMove));

      effects.apply(new MatrixEffectScale(mScale));

      effects.apply(new PostprocessEffectGlow(mRadius,mColor));

      mScreen = new DistortedScreen();

      mScreen.attach(mLeaf, effects, new MeshFlat(1,1) );

      mScreen.glClearColor(1.0f, 1.0f, 1.0f, 1.0f);

      }

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

   int setGlowRadius(int glow)

     {

     int radius = glow/2;

     mRadius.set(radius);

     return radius;

     }

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

   float setGlowAlpha(float glow)

     {

     float alpha = glow/100.0f;

     mColor.set4(alpha);

     return alpha;

     }

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

   public void onDrawFrame(GL10 glUnused)

     {

     mScreen.render(System.currentTimeMillis());

     }

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

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

     {

     float qw = (float)width /mRootW;

     float qh = (float)height/mRootH;

     float factor = 0.5f* (qw<qh ? qw:qh);

     int w = (int)(factor*mRootW);

     int h = (int)(factor*mRootH);

     mMove.set((width-w)/2 ,(height-h)/2, 0);

     mScale.set( factor,factor,factor );

     mScreen.resize(width, height);

     }

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

   public void onSurfaceCreated(GL10 glUnused, EGLConfig config)

     {

     InputStream is = mView.getContext().getResources().openRawResource(R.raw.leaf);

     Bitmap leaf;

     try

       {

       leaf = BitmapFactory.decodeStream(is);

       }

     finally

       {

       try

         {

         is.close();

         }

       catch(IOException e) { }

       }

     mLeaf.setTexture(leaf);

     PostprocessEffectGlow.enable();

     try

       {

       Distorted.onCreate(mView.getContext());

       }

     catch(Exception ex)

       {

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

       }

     }

}