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.save;

import java.io.File;

import java.io.IOException;

import java.io.InputStream;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.opengles.GL10;

import org.distorted.examples.R;

import org.distorted.library.effect.MatrixEffectScale;

import org.distorted.library.effect.VertexEffectSink;

import org.distorted.library.main.DistortedLibrary;

import org.distorted.library.main.DistortedEffects;

import org.distorted.library.main.DistortedScreen;

import org.distorted.library.main.DistortedTexture;

import org.distorted.library.mesh.MeshRectangles;

import org.distorted.library.main.DistortedFramebuffer;

import org.distorted.library.type.Dynamic1D;

import org.distorted.library.type.Static1D;

import org.distorted.library.type.Static3D;

import org.distorted.library.type.Static4D;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.opengl.GLES31;

import android.opengl.GLSurfaceView;

import android.os.Environment;

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

class SaveRenderer implements GLSurfaceView.Renderer

  {

  private GLSurfaceView mView;

  private DistortedEffects mEffects;

  private DistortedFramebuffer mOffscreen;

  private DistortedTexture mTexture;

  private MeshRectangles mMesh;

  private DistortedScreen mScreen;

  private Static1D s0;

  private Static3D mScaleFactor, mScaleMain;

  private float mScale;

  private int bmpHeight, bmpWidth;

  private int scrHeight, scrWidth;

  private float boobsSink;

  private boolean isSaving = false;

  private String mPath;

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

  SaveRenderer(GLSurfaceView v)

    {

    mView = v;

    boobsSink  = 1.0f;

    Static3D pLeft = new Static3D(-68, 36, 0);

    Static3D pRight= new Static3D( 47, 36, 0);

    Static4D sinkRegion = new Static4D(0,0,0,60);

    s0 = new Static1D(boobsSink);

    Dynamic1D diSink = new Dynamic1D();

    diSink.add(s0);

    mScale = 1.0f;

    mScaleFactor = new Static3D(mScale,mScale,1.0f);

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

    mEffects = new DistortedEffects();

    mEffects.apply( new VertexEffectSink(diSink, pLeft , sinkRegion) );

    mEffects.apply( new VertexEffectSink(diSink, pRight, sinkRegion) );

    mEffects.apply( new MatrixEffectScale(mScaleMain));

    mEffects.apply( new MatrixEffectScale(mScaleFactor));

    mScreen = new DistortedScreen();

    }

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

  void setSize(float s)

    {

    boobsSink = s;

    s0.set(boobsSink);

    }

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

  void setScale(float s)

    {

    mScale = s;

    mScaleFactor.set(s,s,1.0f);

    // when we move our scroll bar, this does NOT keep allocating and deallocating

    // the whole WxH texture - the allocation happens only once, on next render, i.e. -

    // when one presses the 'SAVE' button.

    if( mOffscreen!=null )

      mOffscreen.resize( (int)(mScale*bmpWidth),(int)(mScale*bmpHeight));

    }

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

  void Save()

    {

    if( !isSaving )

      {

      isSaving = true;

      File file;

      int lowestNotFound = 1;

      while(true)

        {

        mPath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/girl" + lowestNotFound +".png";

        file = new File(mPath);

        if( !file.exists() ) break;

        lowestNotFound++;

        }

      }

    }

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

  public void onDrawFrame(GL10 glUnused)

    {

    if( isSaving )  // render to an offscreen buffer and read pixels

      {

      mScaleMain.set(1,1,1);

      mOffscreen.render(System.currentTimeMillis());

      applyMatrixEffects(scrWidth,scrHeight);

      int fW =(int)(mScale*bmpWidth);

      int fH =(int)(mScale*bmpHeight);

      ByteBuffer buf = ByteBuffer.allocateDirect(fW*fH*4);

      buf.order(ByteOrder.LITTLE_ENDIAN);

      int textureID = mOffscreen.getTextureID();

      if( textureID>=0 )

        {

        GLES31.glBindTexture(GLES31.GL_TEXTURE_2D, textureID);

        GLES31.glReadPixels( 0, 0, fW, fH, GLES31.GL_RGBA, GLES31.GL_UNSIGNED_BYTE, buf);

        SaveWorkerThread.newBuffer(buf,fW,fH,mPath);

        }

      else

        {

        android.util.Log.e("Save", "Error trying to read from offscreen FBO, textureID="+textureID);

        }

      isSaving = false;

      }

    // Quite subtle issue here. Since we share the DistortedEffects object between the mOffscreen

    // and mScreen surfaces, we cannot render both of them in one go using the same time. That

    // would make the second render, in this case mScreen's render, re-use the values of the

    // Dynamics calculated the first time around and we don't want that (mOffscreen's scale and move

    // are different! What would happen is the mScreen would be - one render when we are 'saving' -

    // get drawn with different dimensions and on-screen position, i.e. we would see a flash.

    mScreen.render(System.currentTimeMillis());

    }

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

  private void applyMatrixEffects(int width, int height)

    {

    float horiRatio = (float)width / mTexture.getWidth();

    float vertRatio = (float)height/ mTexture.getHeight();

    float factor    = horiRatio > vertRatio ? vertRatio : horiRatio;

    mScaleMain.set(factor,factor,factor);

    }

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

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

    {

    scrWidth = width;

    scrHeight= height;

    applyMatrixEffects(width, height);

    mScreen.resize(width, height);

    }

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

  public void onSurfaceCreated(GL10 glUnused, EGLConfig config)

    {

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

    Bitmap bitmap;

    try

      {

      bitmap = BitmapFactory.decodeStream(is);

      }

    finally

      {

      try

        {

        is.close();

        }

      catch(IOException e) { }

      }

    bmpHeight = bitmap.getHeight();

    bmpWidth  = bitmap.getWidth();

    if( mMesh==null )

      {

      mMesh = new MeshRectangles(30,30*bmpHeight/bmpWidth);

      mMesh.setStretch(bmpWidth,bmpHeight,0);

      }

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

    mTexture.setTexture(bitmap);

    if( mOffscreen==null ) mOffscreen = new DistortedFramebuffer( (int)(mScale*bmpWidth) , (int)(mScale*bmpHeight),

                                                                  1, DistortedFramebuffer.NO_DEPTH_NO_STENCIL);

    mOffscreen.detachAll();

    mOffscreen.attach(mTexture,mEffects,mMesh);

    mScreen.detachAll();

    mScreen.attach(mTexture,mEffects,mMesh);

    VertexEffectSink.enable();

    try

      {

      DistortedLibrary.onCreate(mView.getContext());

      }

    catch(Exception ex)

      {

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

      }

    }

  }