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;

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

 * Do not create DEPTH or STENCIL attachment

 */

 * Create DEPTH, but not STENCIL

 */

 * Create both DEPTH and STENCIL

 */

  private static final int DETACH = 1;

  private static final int DETALL = 2;

  private static final int SORT   = 3;

  private int mNumChildren;   // ==mChildren.length(), but we only create mChildren if the first one gets added

    {

    int type;

    DistortedNode node;

      type = t;

      node = n;

    }

  private ArrayList<Job> mJobs = new ArrayList<>();

  float mDistance, mNear;

  int mDepthStencil;

  int[] mDepthStencilH = new int[1];

  int[] mFBOH          = new int[1];

  private float mClearDepth;

    mProjectionMatrix = new float[16];

    mFOV = 60.0f;

    mFBOH[0]         = fbo;

    mDepthStencilH[0]= 0;

    mClearG = 0.0f;

    mClearB = 0.0f;

    mClearA = 0.0f;

    mClearDepth = 1.0f;

    }

    if( mWidth>0 && mHeight>1 )

      {

      if( mFOV>0.0f )  // perspective projection

        {

        float c = mHeight*mNear;

        float right  = +q/2;

        float bottom = -c/2;

        float top    = +c/2;

        float near   =  c/a;

        Matrix.frustumM(mProjectionMatrix, 0, left, right, bottom, top, near, far);

        }

      else             // parallel projection

        {

        float right  = +mWidth/2.0f;

        float bottom = -mHeight/2.0f;

        float top    = +mHeight/2.0f;

        float near   = mWidth+mHeight-mHeight*(1.0f-mNear);

        mDistance    = mWidth+mHeight;

        float far    = mWidth+mHeight+mHeight*(1.0f-mNear);

        Matrix.orthoM(mProjectionMatrix, 0, left, right, bottom, top, near, far);

        }

      }

    }

    float mipmap=1.0f;

    for(int j=0; j<EffectQuality.LENGTH; j++)

      {

      mBuffer[j].mMipmap = mipmap;

      }

    DistortedObject.toDo(); // create the FBOs immediately. This is safe as we must be holding the OpenGL context now.

    GLES30.glStencilMask(0xff);

    GLES30.glDepthMask(true);

    GLES30.glColorMask(true,true,true,true);

    GLES30.glClearColor(0.0f,0.0f,0.0f,0.0f);

    GLES30.glClearDepthf(1.0f);

    GLES30.glClearStencil(0);

    for(int j=0; j<EffectQuality.LENGTH; j++)

      {

      GLES30.glFramebufferTexture2D(GLES30.GL_FRAMEBUFFER, GLES30.GL_COLOR_ATTACHMENT0, GLES30.GL_TEXTURE_2D, mBuffer[j].mColorH[1], 0);

      GLES30.glClear(GLES30.GL_COLOR_BUFFER_BIT);

    }

  private int blitWithDepth(int quality, long currTime)

    {

    DistortedFramebuffer buffer = mBuffer[quality];

    GLES30.glViewport(0, 0, mWidth, mHeight);

    setAsOutput(currTime);

    GLES30.glActiveTexture(GLES30.GL_TEXTURE0);

    GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, buffer.mColorH[0]);

    GLES30.glActiveTexture(GLES30.GL_TEXTURE1);

    GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, buffer.mDepthStencilH[0]);

    GLES30.glDisable(GLES30.GL_STENCIL_TEST);

    GLES30.glStencilMask(0x00);

    DistortedEffects.blitDepthPriv(this);

    GLES30.glActiveTexture(GLES30.GL_TEXTURE0);

    GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, 0);

    GLES30.glActiveTexture(GLES30.GL_TEXTURE1);

    GLES30.glBindTexture(GLES30.GL_TEXTURE_2D, 0);

    // clear buffers

    GLES30.glStencilMask(0xff);

    GLES30.glDepthMask(true);

    GLES30.glColorMask(true,true,true,true);

    GLES30.glClearColor(0.0f,0.0f,0.0f,0.0f);

    GLES30.glClearDepthf(1.0f);

    GLES30.glClearStencil(0);

    buffer.setAsOutput();

    GLES30.glFramebufferTexture2D(GLES30.GL_FRAMEBUFFER, GLES30.GL_COLOR_ATTACHMENT0, GLES30.GL_TEXTURE_2D, buffer.mColorH[1], 0);

    GLES30.glClear(GLES30.GL_COLOR_BUFFER_BIT|GLES30.GL_DEPTH_BUFFER_BIT|GLES30.GL_STENCIL_BUFFER_BIT);

    GLES30.glFramebufferTexture2D(GLES30.GL_FRAMEBUFFER, GLES30.GL_COLOR_ATTACHMENT0, GLES30.GL_TEXTURE_2D, buffer.mColorH[0], 0);

    GLES30.glClear(GLES30.GL_COLOR_BUFFER_BIT);

    return 1;

    }

// Otherwise, render to a buffer and on each change of Postprocessing Bucket, apply the postprocessing

// to a whole buffer and merge it.

    {

    int numRenders = 0;

    int lastQ=0, currQ;

        {

        if( lastB!=currB )

          {

          if( lastB!=0 )

            {

            for(int j=bucketChange; j<i; j++)

              {

              child = children.get(j);

              numRenders += child.markStencilAndDepth(time,mBuffer[lastQ],lastP);

              }

            numRenders += lastP.postprocess(time, this);

            numRenders += blitWithDepth(lastQ,time);

            }

          bucketChange = i;

          }

        numRenders += child.draw(time,mBuffer[currQ]);

          {

            {

            child = children.get(j);

            numRenders += child.markStencilAndDepth(time,mBuffer[currQ],currP);

            }

      lastB = currB;

    }

  void newJob(int t, DistortedNode n, DistortedEffectsPostprocess d)

    {

    mJobs.add(new Job(t,n,d));

    }

  void setAsOutput()

    {

    GLES30.glBindFramebuffer(GLES30.GL_FRAMEBUFFER, mFBOH[0]);

    }

// PUBLIC API

 * Must be called from a thread holding OpenGL Context.

 *

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

        {

    // Watch out: FIRST change topology, only then deal

    // with OpenGL resources. That's because changing Tree

    // can result in additional Framebuffers that would need

    // to be created immediately, before the calls to drawRecursive()

    boolean changed2 =

*/

    DistortedRenderState.reset();

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

 * Bind this Surface as a Framebuffer we can render to.

 * @param time Present time, in milliseconds. The point: looking at this param the library can figure

 *             out if this is the first time during present frame that this FBO is being set as output.

 *             If so, the library, in addition to binding the Surface for output, also clears the

 *             Surface's color and depth attachments.

    GLES30.glBindFramebuffer(GLES30.GL_FRAMEBUFFER, mFBOH[0]);

    if( mTime!=time )

      {

      mTime = time;

      GLES30.glClearDepthf(mClearDepth);

/**

 * Set mipmap level.

 * <p>

 * Trick for speeding up your renders - one can create a pyramid of OutputSurface objects, each next

 * one some constant FACTOR smaller than the previous (0.5 is the common value), then set the Mipmap

 * Level of the i-th object to be FACTOR^i (we start counting from 0). When rendering any scene into

 * such prepared OutputSurface, the library will make sure to scale any Effects used so that the end

 * scene will end up looking identical no matter which object we render to. Identical, that is, except

 * for the loss of quality and gain in speed associated with rendering to a smaller Surface.

 * Example: if you create two FBOs, one 1000x1000 and another 500x500 in size, and set the second one

 * mipmap to 0.5 (the first one's is 1.0 by default), define Effects to be a single move by (100,100),

 * and render a skinned Mesh into both FBO, the end result will look proportionally the same, because

 * in the second case the move vector (100,100) will be auto-scaled to (50,50).

 * @param mipmap The mipmap level. Acceptable range: 0<mipmap<infinity, although mipmap>1

 *               does not make any sense (that would result in loss of speed and no gain in quality)

 */

  public void setMipmap(float mipmap)

    {

    mMipmap = mipmap;

    }

/**

 * Set the (R,G,B,A) values of GLES30.glClearColor() to set up color with which to clear

 * @param r the Red component. Default: 0.0f

 * @param g the Green component. Default: 0.0f

 * @param b the Blue component. Default: 0.0f

 * @param a the Alpha component. Default: 0.0f

 */

  public void glClearColor(float r, float g, float b, float a)

    {

    mClearR = r;

    mClearG = g;

    mClearB = b;

    mClearA = a;

    }

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

/**

 * the Depth buffer of our Surface at the beginning of each frame.

 * @param d the Depth. Default: 1.0f

 */

  public void glClearDepthf(float d)

    {

    mClearDepth = d;

    }

/**

 * Uses glClearStencil() to set up a value with which to clear the

 * Stencil buffer of our Surface at the beginning of each frame.

 *

 * @param s the Stencil. Default: 0

 */

  public void glClearStencil(int s)

    {

    mClearStencil = s;

    }

/**

 * Which buffers to Clear at the beginning of each frame?

 * <p>

 * Valid values: 0, or bitwise OR of one or more values from the set GL_COLOR_BUFFER_BIT,

 *               GL_DEPTH_BUFFER_BIT, GL_STENCIL_BUFFER_BIT.

 * Default: GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT.

 *

 * @param mask bitwise OR of BUFFER_BITs to clear.

 */

  public void glClear(int mask)

    {

    mClear = mask;

    }

/**

 * Create new Projection matrix.

 *

 * @param fov Vertical 'field of view' of the Projection frustrum (in degrees).

 * @param near Distance between the screen plane and the near plane.

 *             Valid vaules: 0<near<1. When near==0, the Near Plane is exactly at the tip of the

 *             pyramid. When near==1 (illegal!) the near plane is equivalent to the screen plane.

      {

      mFOV = fov;

      }

    if( near<   1.0f && near> 0.0f )

      {

      mNear= near;

      }

    else if( near<=0.0f )

      {

      mNear = 0.01f;

      }

    else if( near>=1.0f )

      {

      mNear=0.99f;

      }

    createProjection();

    }

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

 * This method can be safely called mid-render as it doesn't interfere with rendering.

 * @param width The new width.

 * @param height The new height.

    {

    if( mWidth!=width || mHeight!=height )

      {

      mWidth = width;

      mHeight= height;

      createProjection();

        }

    }

/**

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

/**

/**

 * Adds a new child to the last position in the list of our Surface's children.

 * We cannot do this mid-render - actual attachment will be done just before the next render, by the

 * @param node The new Node to add.

 */

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

/**

 * Adds a new child to the last position in the list of our Surface's children.

 * We cannot do this mid-render - actual attachment will be done just before the next render, by the

 * @param surface InputSurface to initialize our child Node with.

 * @param effects DistortedEffects to initialize our child Node with.

 * @param mesh MeshObject to initialize our child Node with.

 * @return the newly constructed child Node, or null if we couldn't allocate resources.

 */

    DistortedNode node = new DistortedNode(surface,effects,mesh);

    }

/**

 * Removes the first occurrence of a specified child from the list of children of our Surface.

 * <p>

 * A bit questionable method as there can be many different Nodes attached as children, some

 * of them having the same Effects but - for instance - different Mesh. Use with care.

 * <p>

 * We cannot do this mid-render - actual detachment will be done just before the next render, by the

 * @param effects DistortedEffects to remove.

 */

  public void detach(DistortedEffects effects)

    {

    long id = effects.getID();

    DistortedNode node;

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

      {

      node = mChildren.get(i);

      if( node.getEffects().getID()==id )

        {

        }

      }

    if( !detached )

      {

      // if we failed to detach any, it still might be the case that

      int num = mJobs.size();

      Job job;

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

        {

        job = mJobs.get(i);

        if( job.type==ATTACH && job.node.getEffects()==effects )

          {

          mJobs.remove(i);

          break;

          }

        }

/**

 * Removes the first occurrence of a specified child from the list of children of our Surface.

 * We cannot do this mid-render - actual attachment will be done just before the next render, by the

 * @param node The Node to remove.

 */

  public void detach(DistortedNode node)

    {

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

/**

 * Removes all children Nodes.

 * We cannot do this mid-render - actual attachment will be done just before the next render, by the

  public void detachAll()

    {

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

/**

 * This is not really part of the public API. Has to be public only because it is a part of the

 * @y.exclude

    Job job;

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

      {

      job = mJobs.remove(0);

      switch(job.type)

        {

                     job.node.setSurfaceParent(this);

                     DistortedMaster.addSorted(mChildren,job.node);

                     break;

                       }

                     break;

                       for(int j=mNumChildren-1; j>=0; j--)

                         {

                         tmp = mChildren.remove(j);

                         tmp.setSurfaceParent(null);

                         }

                       }

                     break;

                     mChildren.remove(job.node);

                     DistortedMaster.addSorted(mChildren,job.node);

        }

      }