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.library.main;

import android.opengl.GLES30;

import android.opengl.Matrix;

import org.distorted.library.effect.EffectType;

import org.distorted.library.effect.MatrixEffect;

import org.distorted.library.message.EffectMessage;

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

class EffectQueueMatrix extends EffectQueue

  {   

  private static final int NUM_UNIFORMS = MatrixEffect.NUM_UNIFORMS;

  private static final int INDEX = EffectType.MATRIX.ordinal();

  private static float[] mMVPMatrix = new float[16];

  private static float[] mViewMatrix= new float[16];

  private static int mObjDH;      // This is a handle to half a Object dimensions

  private static int mMVPMatrixH; // the transformation matrix

  private static int mMVMatrixH;  // the modelview matrix.

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

  EffectQueueMatrix(long id)

    { 

    super(id,NUM_UNIFORMS,INDEX );

    }

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

  private void magnify(DistortedOutputSurface projection, float halfX, float halfY, float halfZ, float marginInPixels)

    {

    float scale, nx, ny;

    float[] result= new float[4];

    float[] point = new float[4];

    float[] matrix= new float[16];

    float minx = Integer.MAX_VALUE;

    float maxx = Integer.MIN_VALUE;

    float miny = Integer.MAX_VALUE;

    float maxy = Integer.MIN_VALUE;

    point[3] = 1.0f;

    Matrix.multiplyMM(matrix, 0, projection.mProjectionMatrix, 0, mViewMatrix, 0);

    point[0] = +halfX; point[1] = +halfY; point[2] = +halfZ;

    Matrix.multiplyMV(result,0,matrix,0,point,0);

    nx = result[0]/result[3];

    ny = result[1]/result[3];

    if( nx<minx ) minx = nx;

    if( nx>maxx ) maxx = nx;

    if( ny<miny ) miny = ny;

    if( ny>maxy ) maxy = ny;

    point[0] = +halfX; point[1] = +halfY; point[2] = -halfZ;

    Matrix.multiplyMV(result,0,matrix,0,point,0);

    nx = result[0]/result[3];

    ny = result[1]/result[3];

    if( nx<minx ) minx = nx;

    if( nx>maxx ) maxx = nx;

    if( ny<miny ) miny = ny;

    if( ny>maxy ) maxy = ny;

    point[0] = +halfX; point[1] = -halfY; point[2] = +halfZ;

    Matrix.multiplyMV(result,0,matrix,0,point,0);

    nx = result[0]/result[3];

    ny = result[1]/result[3];

    if( nx<minx ) minx = nx;

    if( nx>maxx ) maxx = nx;

    if( ny<miny ) miny = ny;

    if( ny>maxy ) maxy = ny;

    point[0] = +halfX; point[1] = -halfY; point[2] = -halfZ;

    Matrix.multiplyMV(result,0,matrix,0,point,0);

    nx = result[0]/result[3];

    ny = result[1]/result[3];

    if( nx<minx ) minx = nx;

    if( nx>maxx ) maxx = nx;

    if( ny<miny ) miny = ny;

    if( ny>maxy ) maxy = ny;

    point[0] = -halfX; point[1] = +halfY; point[2] = +halfZ;

    Matrix.multiplyMV(result,0,matrix,0,point,0);

    nx = result[0]/result[3];

    ny = result[1]/result[3];

    if( nx<minx ) minx = nx;

    if( nx>maxx ) maxx = nx;

    if( ny<miny ) miny = ny;

    if( ny>maxy ) maxy = ny;

    point[0] = -halfX; point[1] = +halfY; point[2] = -halfZ;

    Matrix.multiplyMV(result,0,matrix,0,point,0);

    nx = result[0]/result[3];

    ny = result[1]/result[3];

    if( nx<minx ) minx = nx;

    if( nx>maxx ) maxx = nx;

    if( ny<miny ) miny = ny;

    if( ny>maxy ) maxy = ny;

    point[0] = -halfX; point[1] = -halfY; point[2] = +halfZ;

    Matrix.multiplyMV(result,0,matrix,0,point,0);

    nx = result[0]/result[3];

    ny = result[1]/result[3];

    if( nx<minx ) minx = nx;

    if( nx>maxx ) maxx = nx;

    if( ny<miny ) miny = ny;

    if( ny>maxy ) maxy = ny;

    point[0] = -halfX; point[1] = -halfY; point[2] = -halfZ;

    Matrix.multiplyMV(result,0,matrix,0,point,0);

    nx = result[0]/result[3];

    ny = result[1]/result[3];

    if( nx<minx ) minx = nx;

    if( nx>maxx ) maxx = nx;

    if( ny<miny ) miny = ny;

    if( ny>maxy ) maxy = ny;

    float xlen = projection.mWidth *(maxx-minx)/2;

    float ylen = projection.mHeight*(maxy-miny)/2;

    scale = 1.0f + marginInPixels/( xlen>ylen ? ylen:xlen );

    //android.util.Log.d("scale", ""+marginInPixels+" scale= "+scale+" xlen="+xlen+" ylen="+ylen);

    Matrix.scaleM(mViewMatrix, 0, scale, scale, scale);

    }

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

  static void getUniforms(int mProgramH)

    {

    mObjDH     = GLES30.glGetUniformLocation(mProgramH, "u_objD");

    mMVPMatrixH= GLES30.glGetUniformLocation(mProgramH, "u_MVPMatrix");

    mMVMatrixH = GLES30.glGetUniformLocation(mProgramH, "u_MVMatrix"); 

    }

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

  void compute(long currTime)

    {

    if( currTime==mTime ) return;

    if( mTime==0 ) mTime = currTime;

    long step = (currTime-mTime);

    for(int i=0; i<mNumEffects; i++)

      {

      mCurrentDuration[i] += step;

      if( mEffects[i].compute(mUniforms, NUM_UNIFORMS*i, mCurrentDuration[i], step) )

        {

        for(int j=0; j<mNumListeners; j++)

          EffectMessageSender.newMessage( mListeners.get(j), EffectMessage.EFFECT_FINISHED, mEffects[i].getID(), mDistortedEffectsID);

        if( mEffects[i].isUnity( mUniforms, NUM_UNIFORMS*i) )

          {

          remove(i--);

          mNumEffectsToBe--;

          }

        }

      }

    mTime = currTime;  

    }  

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

  float[] getMVP()

    {

    return mMVPMatrix;

    }

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

  void send(DistortedOutputSurface projection, float halfX, float halfY, float halfZ, float marginInPixels)

    {

    Matrix.setIdentityM(mViewMatrix, 0);

    Matrix.translateM(mViewMatrix, 0, -projection.mWidth/2, projection.mHeight/2, -projection.mDistance);

    float mipmap = projection.mMipmap;

    if( mipmap!=1 ) Matrix.scaleM(mViewMatrix, 0, mipmap, mipmap, mipmap);

    for(int i=0; i<mNumEffects; i++) ((MatrixEffect)mEffects[i]).apply(mViewMatrix,mUniforms,i);

    Matrix.translateM(mViewMatrix, 0, halfX,-halfY,-halfZ);

    if( marginInPixels!=0 ) magnify(projection,halfX,halfY,halfZ, marginInPixels);

    Matrix.multiplyMM(mMVPMatrix, 0, projection.mProjectionMatrix, 0, mViewMatrix, 0);

    GLES30.glUniform3f( mObjDH , halfX, halfY, halfZ);

    GLES30.glUniformMatrix4fv(mMVMatrixH , 1, false, mViewMatrix, 0);

    GLES30.glUniformMatrix4fv(mMVPMatrixH, 1, false, mMVPMatrix , 0);

    }

  }