Distorted Android

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// 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/>.                            //

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

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

 * Class which represents a OpenGL Framebuffer object.

    // COLOR

      GLES31.glGenFramebuffers(mNumFBOs, mFBOH, 0);

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

          {

          GLES31.glBindTexture(GLES31.GL_TEXTURE_2D, mColorH[i*mNumColors+j]);

          GLES31.glTexParameteri(GLES31.GL_TEXTURE_2D, GLES31.GL_TEXTURE_WRAP_S, GLES31.GL_REPEAT);

          GLES31.glTexParameteri(GLES31.GL_TEXTURE_2D, GLES31.GL_TEXTURE_WRAP_T, GLES31.GL_REPEAT);

          GLES31.glTexParameterf(GLES31.GL_TEXTURE_2D, GLES31.GL_TEXTURE_MIN_FILTER, GLES31.GL_NEAREST);

          GLES31.glTexParameterf(GLES31.GL_TEXTURE_2D, GLES31.GL_TEXTURE_MAG_FILTER, GLES31.GL_LINEAR);

          GLES31.glTexImage2D(GLES31.GL_TEXTURE_2D, 0, GLES31.GL_RGBA, mRealWidth, mRealHeight, 0, GLES31.GL_RGBA, GLES31.GL_UNSIGNED_BYTE, null);

          }

        GLES31.glFramebufferTexture2D(GLES31.GL_FRAMEBUFFER, GLES31.GL_COLOR_ATTACHMENT0, GLES31.GL_TEXTURE_2D, mColorH[i*mNumColors], 0);

        GLES31.glBindTexture(GLES31.GL_TEXTURE_2D, 0);

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

    // DEPTH / STENCIL

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

        GLES31.glTexParameteri(GLES31.GL_TEXTURE_2D, GLES31.GL_TEXTURE_WRAP_S, GLES31.GL_REPEAT);

        GLES31.glTexParameteri(GLES31.GL_TEXTURE_2D, GLES31.GL_TEXTURE_WRAP_T, GLES31.GL_REPEAT);

        GLES31.glTexParameteri(GLES31.GL_TEXTURE_2D, GLES31.GL_TEXTURE_MIN_FILTER, GLES31.GL_NEAREST);

        GLES31.glTexParameteri(GLES31.GL_TEXTURE_2D, GLES31.GL_TEXTURE_MAG_FILTER, GLES31.GL_NEAREST);

          {

          GLES31.glTexImage2D(GLES31.GL_TEXTURE_2D, 0, GLES31.GL_DEPTH_COMPONENT, mRealWidth, mRealHeight, 0, GLES31.GL_DEPTH_COMPONENT, GLES31.GL_UNSIGNED_INT, null);

          }

        else if (mDepthStencil == BOTH_DEPTH_STENCIL)

          {

          GLES31.glTexImage2D(GLES31.GL_TEXTURE_2D, 0, GLES31.GL_DEPTH24_STENCIL8, mRealWidth, mRealHeight, 0, GLES31.GL_DEPTH_STENCIL, GLES31.GL_UNSIGNED_INT_24_8, null);

          }

        }

          {

          GLES31.glFramebufferTexture2D(GLES31.GL_FRAMEBUFFER, GLES31.GL_DEPTH_ATTACHMENT, GLES31.GL_TEXTURE_2D, mDepthStencilH[i], 0);

          }

        else if (mDepthStencil == BOTH_DEPTH_STENCIL)

          {

          GLES31.glFramebufferTexture2D(GLES31.GL_FRAMEBUFFER, GLES31.GL_DEPTH_STENCIL_ATTACHMENT, GLES31.GL_TEXTURE_2D, mDepthStencilH[i], 0);

          }

        }

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

    // DETACH

    // TODO

      // "Note that the texture image is specifically not detached from any other framebuffer objects.

      //  Detaching the texture image from any other framebuffer objects is the responsibility of the application."

        {

        GLES31.glBindFramebuffer(GLES31.GL_FRAMEBUFFER, mFBOH[i]);

        GLES31.glFramebufferTexture2D(GLES31.GL_FRAMEBUFFER, GLES31.GL_DEPTH_ATTACHMENT, GLES31.GL_TEXTURE_2D, 0, 0);

        GLES31.glFramebufferTexture2D(GLES31.GL_FRAMEBUFFER, GLES31.GL_DEPTH_STENCIL_ATTACHMENT, GLES31.GL_TEXTURE_2D, 0, 0);

        mDepthStencilH[i]=0;

        }

      GLES31.glDeleteTextures(mNumFBOs, mDepthStencilH, 0);

      GLES31.glBindFramebuffer(GLES31.GL_FRAMEBUFFER, 0);

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

      android.util.Log.e("DistortedFramebuffer", "FRAMEBUFFER INCOMPLETE, "+message+" error="+status);

      GLES31.glDeleteTextures(1, mDepthStencilH, 0);

      GLES31.glDeleteFramebuffers(1, mFBOH, 0);

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

      for(int i=0; i<mNumFBOs*mNumColors; i++) mColorH[i] = 0;

      {

      for(int i=0; i<mNumFBOs; i++) mDepthStencilH[i] = 0;

    for(int i=0; i<mNumFBOs; i++) mFBOH[i] = 0;

// called from onDestroy(); mark OpenGL assets as 'not created'

      {

      mColorCreated = NOT_CREATED_YET;

      mColorH[0] = 0;

      }

      mDepthStencilH[0] = 0;

  boolean setAsInput(int fbo, int texture)

    {

    if( texture>=0 && texture<mNumColors && fbo>=0 && fbo<mNumFBOs && mColorH[mNumColors*fbo + texture]>0 )

      {

      GLES31.glActiveTexture(GLES31.GL_TEXTURE0);

      GLES31.glBindTexture(GLES31.GL_TEXTURE_2D, mColorH[mNumColors*fbo + texture]);

      return true;

      }

    return false;

    }

// that they were autocreated only for the Library's internal purposes (SYSTEM) or for using

// inside a Tree of DistortedNodes (TREE)

// SYSTEM surfaces do not get removed in onDestroy().

    }

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

// create a multi-framebuffer (1 object containing multiple FBOs)

  DistortedFramebuffer(int numfbos, int numcolors, int depthStencil, int type, int width, int height)

    {

    super(width,height,NOT_CREATED_YET,numfbos,numcolors,depthStencil,NOT_CREATED_YET, type);

// PUBLIC API

 * @param height       Height of all the COLOR attachments.

 * @param numcolors    How many COLOR attachments to create?

  @SuppressWarnings("unused")

      {

      GLES31.glBindTexture(GLES31.GL_TEXTURE_2D, mColorH[0]);

      }

    return false;

    }

/**

 * Bind the underlying rectangle of pixels as a OpenGL Texture.

 *

 * @return <code>true</code> if successful.

 */

  public boolean setAsInput(int texture)

    {

    if( texture>=0 && texture<mNumColors && mColorH[texture]>0 )

      {

      GLES31.glBindTexture(GLES31.GL_TEXTURE_2D, mColorH[texture]);

      }

    return false;

    }

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

  public void bindForOutput(int texture)

    {

    if( texture>=0 && texture<mNumColors && mColorH[texture]>0 )

      {

    }

/**

 * Enable.disable DEPTH and STENCIL buffers.

 *

  public void enableDepthStencil(int depthStencil)

    {

      mDepthStencil = depthStencil;

        markForCreation();

        {

        mDepthStencilCreated = DONT_CREATE;

        markForCreation();

        }

    }

/**

 * <p>

 * Catch: this will only work if the library has had time to actually create the texture. Remember

 * that the texture gets created only on first render, thus creating a Texture object and immediately

 * calling this method will return an invalid (negative) result.

 *

 *         it, return a negative value. Otherwise, return ID of COLOR attachment 0.