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;

import org.distorted.library.message.EffectMessage;

import org.distorted.library.program.FragmentUniformsException;

import org.distorted.library.program.LinkingException;

import org.distorted.library.program.VertexCompilationException;

import org.distorted.library.program.VertexUniformsException;

import org.distorted.library.type.Dynamic1D;

import org.distorted.library.type.Static1D;

import java.nio.ByteOrder;

import java.nio.FloatBuffer;

class EffectQueuePostprocess extends EffectQueue

  {

  private static final int TEX_DATA_SIZE= 2; // Post Program: size of the texture coordinate data in elements.

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

  static

    {

    int bytes_per_float = 4;

    float[] textureNor= {  0.0f,  0.0f,   0.0f, 1.0f,  1.0f, 0.0f,  1.0f, 1.0f };

    mQuadTexture.put(textureNor).position(0);

    {                                       // where G(x)= (1/(sqrt(2*PI))) * e^(-(x^2)/2). The last 0 terminates.

    0.398948f, 0.398769f, 0.398231f, 0.397336f, 0.396086f, 0.394485f, 0.392537f, 0.390247f, 0.387622f, 0.384668f,

    0.381393f, 0.377806f, 0.373916f, 0.369733f, 0.365268f, 0.360532f, 0.355538f, 0.350297f, 0.344823f, 0.339129f,

    0.333229f, 0.327138f, 0.320868f, 0.314436f, 0.307856f, 0.301142f, 0.294309f, 0.287373f, 0.280348f, 0.273248f,

    0.266089f, 0.258884f, 0.251648f, 0.244394f, 0.237135f, 0.229886f, 0.222657f, 0.215461f, 0.208311f, 0.201217f,

    0.194189f, 0.187238f, 0.180374f, 0.173605f, 0.166940f, 0.160386f, 0.153951f, 0.147641f, 0.141462f, 0.135420f,

    0.129520f, 0.123765f, 0.118159f, 0.112706f, 0.107408f, 0.102266f, 0.097284f, 0.092461f, 0.087797f, 0.083294f,

    0.078951f, 0.074767f, 0.070741f, 0.066872f, 0.063158f, 0.059596f, 0.056184f, 0.052920f, 0.049801f, 0.046823f,

    0.043984f, 0.041280f, 0.038707f, 0.036262f, 0.033941f, 0.031740f, 0.029655f, 0.027682f, 0.025817f, 0.024056f,

    0.022395f, 0.020830f, 0.019357f, 0.017971f, 0.016670f, 0.015450f, 0.014305f, 0.013234f, 0.012232f, 0.011295f,

    0.010421f, 0.009606f, 0.008847f, 0.008140f, 0.007483f, 0.006873f, 0.006307f, 0.005782f, 0.005296f, 0.004847f,

    0.004432f, 0.000000f

    };

  private static final int NUM_GAUSSIAN = GAUSSIAN.length-2;

  // Support blurs consisting of the present pixel and up to MAX_BLUR pixels in each direction

  private static final int MAX_BLUR = 50;

  // in all 4 directions)

  // We need room for MAX_BLUR of them, and sum(i=0...N, floor((i+3)/2)) = N + floor(N*N/4)

  private static float[] weightsCache = new float[MAX_BLUR + MAX_BLUR*MAX_BLUR/4];

  private static float[] offsetsCache = new float[MAX_BLUR + MAX_BLUR*MAX_BLUR/4];

  private static int mRadius2H,mOffsets2H,mWeights2H,mDepth2H, mColorTexture2H, mDepthTexture2H;

  private static float[] mOffsets = new float[MAX_BLUR];

  EffectQueuePostprocess(long id)

    { 

    super(id,NUM_UNIFORMS,NUM_CACHE,INDEX );

    }

  static void createProgram(Resources resources)

  throws FragmentCompilationException,VertexCompilationException,VertexUniformsException,FragmentUniformsException,LinkingException

    {

    final InputStream blur1FragmentStream = resources.openRawResource(R.raw.blur1_fragment_shader);

    try

      {

      mBlur1Program = new DistortedProgram(blur1VertexStream,blur1FragmentStream,

                                          Distorted.GLSL_VERSION + "#define MAX_BLUR "+MAX_BLUR, Distorted.GLSL);

    catch(Exception e)

      {

      android.util.Log.e("EFFECTS", "exception trying to compile BLUR1 program: "+e.getMessage());

      throw new RuntimeException(e.getMessage());

      }

    int blur1ProgramH = mBlur1Program.getProgramHandle();

    mRadius1H       = GLES30.glGetUniformLocation( blur1ProgramH, "u_Radius");

    mOffsets1H      = GLES30.glGetUniformLocation( blur1ProgramH, "u_Offsets");

    mWeights1H      = GLES30.glGetUniformLocation( blur1ProgramH, "u_Weights");

    mDepth1H        = GLES30.glGetUniformLocation( blur1ProgramH, "u_Depth");

    mColorTexture1H = GLES30.glGetUniformLocation( blur1ProgramH, "u_ColorTexture");

    final InputStream blur2VertexStream   = resources.openRawResource(R.raw.blur_vertex_shader);

    final InputStream blur2FragmentStream = resources.openRawResource(R.raw.blur2_fragment_shader);

    try

      {

      mBlur2Program = new DistortedProgram(blur2VertexStream,blur2FragmentStream,

                                          Distorted.GLSL_VERSION + "#define MAX_BLUR "+MAX_BLUR, Distorted.GLSL);

    catch(Exception e)

      {

      android.util.Log.e("EFFECTS", "exception trying to compile BLUR2 program: "+e.getMessage());

      mBlur2Program = mBlur1Program;

    int blur2ProgramH = mBlur2Program.getProgramHandle();

    mRadius2H       = GLES30.glGetUniformLocation( blur2ProgramH, "u_Radius");

    mOffsets2H      = GLES30.glGetUniformLocation( blur2ProgramH, "u_Offsets");

    mWeights2H      = GLES30.glGetUniformLocation( blur2ProgramH, "u_Weights");

    mDepth2H        = GLES30.glGetUniformLocation( blur2ProgramH, "u_Depth");

    mColorTexture2H = GLES30.glGetUniformLocation( blur2ProgramH, "u_ColorTexture");

    mDepthTexture2H = GLES30.glGetUniformLocation( blur2ProgramH, "u_DepthTexture");

    long step = (currTime-mTime);

      {

        {

        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;

        }

      }

    return true;

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

  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];

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

// https://software.intel.com/en-us/blogs/2014/07/15/an-investigation-of-fast-real-time-gpu-based-image-blur-algorithms

      mWeights[0] = GAUSSIAN[0];

      float sum   = GAUSSIAN[0];

      int j;

        {

        x += P;

        j = (int)x;

        z = x-j;

        sum += 2*mWeights[i];

        }

      weightsCache[offset] = mWeights[0];

      offsetsCache[offset] = 0.0f;

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

        {

        offsetsCache[offset+i+1] = mWeights[2*i+1]*(2*i+1) + mWeights[2*i+2]*(2*i+2);

        weightsCache[offset+i+1] = mWeights[2*i+1] + mWeights[2*i+2];

        offsetsCache[offset+i+1]/= weightsCache[offset+i+1];

        }

      if( radius%2 == 1 )

        {

        int index = offset + radius/2 +1;

        }

      }

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

      float w = surface.mBuffer1.mWidth;

      float h = surface.mBuffer2.mHeight;

      int radius = (int)mUniforms[0];

      if( radius>=MAX_BLUR ) radius = MAX_BLUR-1;

      computeGaussianKernel(radius);

      int offset = radius + radius*radius/4;

      radius = (radius+1)/2;

      GLES30.glViewport(0, 0, (int)w, (int)h);

      // horizontal blur

      GLES30.glUniform1fv( mWeights1H, radius+1, weightsCache,offset);

      GLES30.glUniform1i( mRadius1H, radius);

      GLES30.glUniform1f( mDepth1H , 1.0f-surface.mNear);

      GLES30.glUniform1fv( mOffsets1H ,radius+1, mOffsets,0);

      GLES30.glVertexAttribPointer(mBlur1Program.mAttribute[0], POS_DATA_SIZE, GLES30.GL_FLOAT, false, 0, mQuadPositions);

      // vertical blur

      surface.mBuffer1.setAsDepth();

      GLES30.glUniform1fv( mWeights2H, radius+1, weightsCache,offset);

      GLES30.glUniform1i( mRadius2H, radius);

      GLES30.glUniform1f( mDepth2H , 1.0f-surface.mNear);

      GLES30.glUniform1i( mDepthTexture2H , 1 );

      GLES30.glVertexAttribPointer(mBlur2Program.mAttribute[0], POS_DATA_SIZE, GLES30.GL_FLOAT, false, 0, mQuadPositions);

      }

// blur

    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;

      mInter[2][mNumEffects] = null;

      return addBase(eln);

      }

    return -1;

    }

  }