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library / src / main / java / org / distorted / library / effect / FragmentEffect.java @ c1fa9e3c

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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2017 Leszek Koltunski                                                               //
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//                                                                                               //
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// This file is part of Distorted.                                                               //
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//                                                                                               //
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// Distorted is free software: you can redistribute it and/or modify                             //
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// it under the terms of the GNU General Public License as published by                          //
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// the Free Software Foundation, either version 2 of the License, or                             //
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// (at your option) any later version.                                                           //
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//                                                                                               //
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// Distorted is distributed in the hope that it will be useful,                                  //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of                                //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                                 //
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// GNU General Public License for more details.                                                  //
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//                                                                                               //
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// You should have received a copy of the GNU General Public License                             //
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// along with Distorted.  If not, see <http://www.gnu.org/licenses/>.                            //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.library.effect;
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import org.distorted.library.type.Static3D;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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 * Abstract class that represents an Effect that works by injecting certain code into the main Fragment shader.
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 */
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public abstract class FragmentEffect extends Effect
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  {
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/**
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 * 12: 4-per effect interpolated values, 3 dimensional Center (+padding), 3 dimensional Region (+padding).
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 */
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  public static final int NUM_UNIFORMS = 12;
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  static final int VALUES_OFFSET = 0;
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  static final int CENTER_OFFSET = 5;
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  static final int REGION_OFFSET = 8;
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  private static String mGLSL = "";
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  private static int mNumEnabled = 0;
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  final static Static3D MAX_REGION = new Static3D(1000000,1000000,1000000);
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///////////////////////////////////////////////////////////////////////////////////////////////////
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  FragmentEffect(EffectName name)
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    {
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    super(name);
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    }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// prepare code to be injected into the 'main_fragment_shader' main() function.
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  static void addEffect(EffectName not_smooth, EffectName yes_smooth, String code)
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    {
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    int effect1 = not_smooth.ordinal();
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    int effect2 = yes_smooth.ordinal();
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    if( mEnabled[effect1] ) return;
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    mEnabled[effect1] = true;
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    mNumEnabled ++;
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    mGLSL +=
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         "if( fName[i]=="+effect1+")\n"
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        +  "{\n"
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        +  "degree = sign(degree); \n"
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        +   code +"\n"
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        +  "}\n"
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        +"else\n"
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        +"if( fName[i]=="+effect2+")\n"
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        +  "{\n"
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        +   code +"\n"
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        +  "}\n"
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        +"else\n";
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    }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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 * Only for use by the library itself.
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 *
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 * @y.exclude
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 */
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  public static String getGLSL()
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    {
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    return mGLSL + "{}";
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    }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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  static void destroyStatics()
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    {
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    mNumEnabled = 0;
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    mGLSL = "";
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    }
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// PUBLIC API
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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 * Return the number of Fragment effects enabled.
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 */
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  public static int getNumEnabled()
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    {
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    return mNumEnabled;
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    }
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  }