Distorted Android

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

/**

 * Returns the maximum number of Postprocess effects.

 *

 * @return The maximum number of Postprocess effects

 */

  public static int getMaxPostprocess()

    {

    return EffectQueue.getMax(EffectTypes.POSTPROCESS.ordinal());

    }

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

/**

 * Sets the maximum number of Postprocess effects that can be stored in a single EffectQueue at one time.

 * This can fail if:

 * <ul>

 * <li>the value of 'max' is outside permitted range (0 &le; max &le; Byte.MAX_VALUE)

 * <li>We try to increase the value of 'max' when it is too late to do so already. It needs to be called

 *     before the Fragment Shader gets compiled, i.e. before the call to {@link #onSurfaceCreated}. After this

 *     time only decreasing the value of 'max' is permitted.

 * <li>Furthermore, this needs to be called before any instances of the DistortedEffects class get created.

 * </ul>

 *

 * @param max new maximum number of simultaneous Postprocess Effects. Has to be a non-negative number not greater

 *            than Byte.MAX_VALUE

 * @return <code>true</code> if operation was successful, <code>false</code> otherwise.

 */

  public static boolean setMaxPostprocess(int max)

    {

    return EffectQueue.setMax(EffectTypes.POSTPROCESS.ordinal(),max);

    }

  SMOOTH_CONTRAST  ( EffectTypes.FRAGMENT,   new float[] {1.0f}           , 1, true, false ),

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

  // POSTPROCESSING EFFECTS.

  // Always 3 Uniforms: 1 per-effect interpolated value + 2 dimensional center.

 /**

   * Blur the area around the center.

   * <p>

   * Uniforms: (radius,centerX,centerY)

   * <p>

   * Unity: radius==0

   */

  BLUR             ( EffectTypes.POSTPROCESS,new float[] {0.0f}          , 1, false, true );

    int max = mMax[mMaxIndex];

    if( max>0 )

      mName            = new int[max];

      mUniforms        = new float[numUniforms*max];

      mInter           = new Dynamic[3][max];

      mCurrentDuration = new long[max];

      mID              = new long[max];

      mIDIndex         = new byte[max];

      mFreeIndexes     = new byte[max];

      for(byte i=0; i<max; i++) mFreeIndexes[i] = i;

        mCache = new float[numCache*max];

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

// 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;

import android.opengl.GLES20;

import org.distorted.library.message.EffectMessage;

import org.distorted.library.type.Data1D;

import org.distorted.library.type.Data2D;

import org.distorted.library.type.Dynamic1D;

import org.distorted.library.type.Dynamic2D;

import org.distorted.library.type.Static1D;

import org.distorted.library.type.Static2D;

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

class EffectQueuePostprocess extends EffectQueue

  {

  private static final int NUM_UNIFORMS = 3;

  private static final int NUM_CACHE    = 0;

  private static final int INDEX = EffectTypes.POSTPROCESS.ordinal();

  private static int mNumEffectsH;

  private static int mTypeH;

  private static int mUniformsH;

  private static int mObjDH;

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

  EffectQueuePostprocess(long id)

    { 

    super(id,NUM_UNIFORMS,NUM_CACHE,INDEX );

    }

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

  static void getUniforms(int mProgramH)

    {

    mNumEffectsH= GLES20.glGetUniformLocation( mProgramH, "pNumEffects");

    mTypeH      = GLES20.glGetUniformLocation( mProgramH, "pType");

    mUniformsH  = GLES20.glGetUniformLocation( mProgramH, "pUniforms");

    mObjDH      = GLES20.glGetUniformLocation( mProgramH, "u_objD");

    }

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

  synchronized void compute(long currTime) 

    {

    if( currTime==mTime ) return;

    if( mTime==0 ) mTime = currTime;

    long step = (currTime-mTime);

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

      {

      if( mInter[0][i]!=null && mInter[0][i].interpolateMain(mUniforms ,NUM_UNIFORMS*i, mCurrentDuration[i], step) )

        {

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

          EffectMessageSender.newMessage( mListeners.elementAt(j),

                                          EffectMessage.EFFECT_FINISHED,

                                         (mID[i]<<EffectTypes.LENGTH)+EffectTypes.POSTPROCESS.type,

                                          mName[i],

                                          mObjectID);

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

          {

          remove(i);

          i--;

          continue;

          }

        else mInter[0][i] = null;

        }

      if( mInter[1][i]!=null )

        {

        mInter[1][i].interpolateMain(mUniforms, NUM_UNIFORMS*i+1, mCurrentDuration[i], step);

        }

      mCurrentDuration[i] += step;

      }

    mTime = currTime;  

    }  

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

  protected void moveEffect(int index)

    {

    mUniforms[NUM_UNIFORMS*index  ] = mUniforms[NUM_UNIFORMS*(index+1)  ];

    mUniforms[NUM_UNIFORMS*index+1] = mUniforms[NUM_UNIFORMS*(index+1)+1];

    mUniforms[NUM_UNIFORMS*index+2] = mUniforms[NUM_UNIFORMS*(index+1)+2];

    }

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

  synchronized void send(float objX, float objY)

    {

    GLES20.glUniform1i( mNumEffectsH, mNumEffects);

    GLES20.glUniform2f( mObjDH , objX, objY);

    if( mNumEffects>0 )

      {

      GLES20.glUniform1iv( mTypeH    ,  mNumEffects, mName    ,0);

      GLES20.glUniform4fv( mUniformsH,2*mNumEffects, mUniforms,0);

      }

    }

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

// blur

  synchronized long add(EffectNames eln, Data1D degree, Data2D center)

    {

    if( mMax[INDEX]>mNumEffects )

      {

      if( degree instanceof Dynamic1D)

        {

        mInter[0][mNumEffects] = (Dynamic1D)degree;

        }

      else if( degree instanceof Static1D)

        {

        mInter[0][mNumEffects] = null;

        mUniforms[NUM_UNIFORMS*mNumEffects] = ((Static1D)degree).getX();

        }

      else return -1;

      if( center instanceof Dynamic2D)

        {

        mInter[1][mNumEffects] = (Dynamic2D)center;

        }

      else if( center instanceof Static2D)

        {

        mInter[1][mNumEffects] = null;

        mUniforms[NUM_UNIFORMS*mNumEffects+1] = ((Static2D)center).getX();

        mUniforms[NUM_UNIFORMS*mNumEffects+2] = ((Static2D)center).getY();

        }

      else return -1;

      return addBase(eln);

      }

    return -1;

    }

  }

  MATRIX      ( 0x1 ),  // we will need to perform bitwise operations on those - so keep the values 1,2,4,8...

  VERTEX      ( 0x2 ),

  FRAGMENT    ( 0x4 ),

  /**

   * Postprocessing done to the texture the first stage fragment shader created (if this queue is

   * empty, the first stage skips this intermediate texture)

   */

  POSTPROCESS ( 0x8 );

    maxtable[2] = 5;  // Max 5 FRAGMENT Effects

    maxtable[3] = 5;  // Max 5 POSTPROCESSING Effects

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

// 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/>.                       //

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

varying vec2 vTexCoordinate;

uniform sampler2D u_Texture;

uniform vec2 u_objD;

uniform int fNumEffects;                   // total number of postprocessing effects

#if NUM_POSTPROCESS>0

uniform int pType[NUM_POSTPROCESS];        // their types.

uniform vec4 pUniforms[2*NUM_POSTPROCESS]; // i-th effect is 2 consecutive vec4's: [2*i], [2*i+1].

                                           //

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

// BLUR EFFECT

void blur(out vec4 color)

  {

  color = vec4(0.0);

  float blurSizeH = 1.0 / u_objD.x;

  float blurSizeV = 1.0 / u_objD.y;

  for (int x = -4; x <= 4; x++)

    for (int y = -4; y <= 4; y++)

      color += texture( u_Texture, vec2(vTexCoord.x + x * blurSizeH, vTexCoord.y + y * blurSizeV) ) / 81.0;

  }

#endif

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

void main()

  {

  vec4 pixel = texture2D(u_Texture,v_TexCoordinate);

#if NUM_POSTPROCESS>0

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

    {

    if( pType[i]==BLUR ) blur(pixel);

    }

#endif

  gl_FragColor = pixel;

  }

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

// 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/>.                       //

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

attribute vec2 a_Position;       // Per-vertex position information we will pass in.

attribute vec2 a_TexCoordinate;  // Per-vertex texture coordinate information we will pass in.

varying   vec2 v_TexCoordinate;  //

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

// empty 2D vertex shader for postprocessing

void main()

  {

  v_TexCoordinate = a_TexCoordinate;

  gl_Position = vec4(a_Position, 0.0, 1.0);

  }