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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2016 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;
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import java.util.ArrayList;
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import java.util.HashMap;
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import android.opengl.GLES30;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Class which represents a Node in a Tree of (InputSurface,Mesh,Effects) triplets.
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* <p>
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* Having organized such sets into a Tree, we can then render any Node to any OutputSurface.
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* That recursively renders the set held in the Node and all its children.
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* <p>
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* The class takes special care to only render identical sub-trees once. Each Node holds a reference
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* to sub-class 'NodeData'. Two identical sub-trees attached at different points of the main tree
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* will point to the same NodeData; only the first of this is rendered (when mData.numRendered==0).
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*/
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public class DistortedNode implements DistortedAttacheable
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{
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private static HashMap<ArrayList<Long>,NodeData> mMapNodeID = new HashMap<>();
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private static long mNextNodeID =0;
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private DistortedNode mParent;
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private MeshObject mMesh;
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private DistortedEffects mEffects;
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private DistortedInputSurface mSurface;
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private NodeData mData;
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private ArrayList<DistortedNode> mChildren;
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private int[] mNumChildren; // ==mChildren.length(), but we only create mChildren if the first one gets added
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private class NodeData
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{
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long ID;
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int numPointingNodes;
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int numRender;
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ArrayList<Long> key;
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DistortedFramebuffer mFBO;
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NodeData(long id, ArrayList<Long> k)
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{
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ID = id;
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key = k;
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numPointingNodes= 1;
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numRender =-1;
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mFBO = null;
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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static synchronized void onDestroy()
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{
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mNextNodeID = 0;
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mMapNodeID.clear();
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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private ArrayList<Long> generateIDList()
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{
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ArrayList<Long> ret = new ArrayList<>();
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ret.add( mSurface.getID() );
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if( mNumChildren[0]==0 )
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{
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ret.add(-mEffects.getID());
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}
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DistortedNode node;
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for(int i=0; i<mNumChildren[0]; i++)
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{
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node = mChildren.get(i);
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ret.add(node.mData.ID);
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}
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return ret;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Debug - print all the Node IDs
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@SuppressWarnings("unused")
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void debug(int depth)
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{
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String tmp="";
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int i;
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for(i=0; i<depth; i++) tmp +=" ";
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tmp += ("NodeID="+mData.ID+" nodes pointing: "+mData.numPointingNodes+" surfaceID="+
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mSurface.getID()+" FBO="+(mData.mFBO==null ? "null":mData.mFBO.getID()))+
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" parent sID="+(mParent==null ? "null": (mParent.mSurface.getID()));
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android.util.Log.e("NODE", tmp);
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for(i=0; i<mNumChildren[0]; i++)
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mChildren.get(i).debug(depth+1);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Debug - print contents of the HashMap
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@SuppressWarnings("unused")
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static void debugMap()
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{
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NodeData tmp;
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for(ArrayList<Long> key: mMapNodeID.keySet())
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{
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tmp = mMapNodeID.get(key);
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android.util.Log.e("NODE", "NodeID: "+tmp.ID+" <-- "+key);
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// tree isomorphism algorithm
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private void adjustIsomorphism()
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{
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ArrayList<Long> newList = generateIDList();
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NodeData newData = mMapNodeID.get(newList);
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if( newData!=null )
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{
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newData.numPointingNodes++;
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}
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else
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{
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newData = new NodeData(++mNextNodeID,newList);
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mMapNodeID.put(newList,newData);
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}
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boolean deleteOldFBO = false;
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boolean createNewFBO = false;
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if( --mData.numPointingNodes==0 )
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{
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mMapNodeID.remove(mData.key);
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if( mData.mFBO!=null ) deleteOldFBO=true;
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}
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if( mNumChildren[0]>0 && newData.mFBO==null )
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{
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createNewFBO = true;
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}
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if( mNumChildren[0]==0 && newData.mFBO!=null )
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{
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newData.mFBO.markForDeletion();
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android.util.Log.d("NODE", "ERROR!! this NodeData cannot possibly contain a non-null FBO!! "+newData.mFBO.getID() );
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newData.mFBO = null;
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}
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if( deleteOldFBO && createNewFBO )
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{
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newData.mFBO = mData.mFBO; // just copy over
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android.util.Log.d("NODE", "copying over FBOs "+mData.mFBO.getID() );
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}
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else if( deleteOldFBO )
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{
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mData.mFBO.markForDeletion();
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android.util.Log.d("NODE", "deleting old FBO "+mData.mFBO.getID() );
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mData.mFBO = null;
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}
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else if( createNewFBO )
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{
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newData.mFBO = new DistortedFramebuffer(true, DistortedSurface.TYPE_TREE, mSurface.getWidth(),mSurface.getHeight());
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android.util.Log.d("NODE", "creating new FBO "+newData.mFBO.getID() );
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}
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mData = newData;
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if( mParent!=null ) mParent.adjustIsomorphism();
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// return the total number of render calls issued
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int drawRecursive(int renderNum, long currTime, DistortedOutputSurface surface)
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{
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int ret = 0;
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float halfX = mSurface.getWidth()/2.0f;
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float halfY = mSurface.getHeight()/2.0f;
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if( mNumChildren[0]>0 && mData.numRender!=renderNum )
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{
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mData.numRender = renderNum;
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mData.mFBO.setAsOutput();
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GLES30.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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GLES30.glClear( GLES30.GL_DEPTH_BUFFER_BIT | GLES30.GL_COLOR_BUFFER_BIT);
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if( mSurface.setAsInput() )
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{
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ret++;
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DistortedEffects.drawNoEffectsPriv(halfX, halfY, mMesh, mData.mFBO);
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}
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for(int i=0; i<mNumChildren[0]; i++)
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{
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ret += mChildren.get(i).drawRecursive(renderNum, currTime, mData.mFBO);
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}
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}
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DistortedInputSurface input = mNumChildren[0]==0 ? mSurface : mData.mFBO;
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if( input.setAsInput() )
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{
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ret++;
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mEffects.drawPriv(halfX, halfY, mMesh, surface, currTime);
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}
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return ret;
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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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* Constructs new Node.
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*
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* @param surface InputSurface to put into the new Node.
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* @param effects DistortedEffects to put into the new Node.
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* @param mesh MeshObject to put into the new Node.
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*/
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public DistortedNode(DistortedInputSurface surface, DistortedEffects effects, MeshObject mesh)
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{
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mSurface = surface;
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mEffects = effects;
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mMesh = mesh;
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mChildren = null;
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mNumChildren = new int[1];
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mNumChildren[0]= 0;
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mParent = null;
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ArrayList<Long> list = new ArrayList<>();
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list.add(mSurface.getID());
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list.add(-mEffects.getID());
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mData = mMapNodeID.get(list);
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if( mData!=null )
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{
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mData.numPointingNodes++;
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}
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else
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{
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mData = new NodeData(++mNextNodeID,list);
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mMapNodeID.put(list, mData);
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Copy-constructs new Node from another Node.
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*
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* @param node The DistortedNode to copy data from.
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* @param flags bit field composed of a subset of the following:
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* {@link Distorted#CLONE_SURFACE}, {@link Distorted#CLONE_MATRIX}, {@link Distorted#CLONE_VERTEX},
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* {@link Distorted#CLONE_FRAGMENT} and {@link Distorted#CLONE_CHILDREN}.
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* For example flags = CLONE_SURFACE | CLONE_CHILDREN.
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*/
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public DistortedNode(DistortedNode node, int flags)
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{
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mEffects= new DistortedEffects(node.mEffects,flags);
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mMesh = node.mMesh;
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mParent = null;
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if( (flags & Distorted.CLONE_SURFACE) != 0 )
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{
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mSurface = node.mSurface;
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}
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else
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{
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int w = node.mSurface.getWidth();
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int h = node.mSurface.getHeight();
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if( node.mSurface instanceof DistortedTexture )
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{
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mSurface = new DistortedTexture(w,h, DistortedSurface.TYPE_TREE);
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}
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else if( node.mSurface instanceof DistortedFramebuffer )
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{
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boolean hasDepth = ((DistortedFramebuffer) node.mSurface).hasDepth();
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mSurface = new DistortedFramebuffer(hasDepth,DistortedSurface.TYPE_TREE,w,h);
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}
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}
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if( (flags & Distorted.CLONE_CHILDREN) != 0 )
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{
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if( node.mChildren==null ) // do NOT copy over the NULL!
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{
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node.mChildren = new ArrayList<>(2);
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}
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mChildren = node.mChildren;
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mNumChildren = node.mNumChildren;
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}
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else
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{
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mChildren = null;
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mNumChildren = new int[1];
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mNumChildren[0] = 0;
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}
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ArrayList<Long> list = generateIDList();
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mData = mMapNodeID.get(list);
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if( mData!=null )
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{
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mData.numPointingNodes++;
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}
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else
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{
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mData = new NodeData(++mNextNodeID,list);
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mMapNodeID.put(list, mData);
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Adds a new child to the last position in the list of our Node's children.
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* <p>
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* We cannot do this mid-render - actual attachment will be done just before the next render, by the
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* DistortedAttachDeamon (by calling attachNow())
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*
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* @param node The new Node to add.
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*/
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public void attach(DistortedNode node)
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{
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DistortedAttachDaemon.attach(this,node);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Adds a new child to the last position in the list of our Node's children.
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* <p>
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* We cannot do this mid-render - actual attachment will be done just before the next render, by the
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* DistortedAttachDeamon (by calling attachNow())
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*
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* @param surface InputSurface to initialize our child Node with.
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* @param effects DistortedEffects to initialize our child Node with.
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* @param mesh MeshObject to initialize our child Node with.
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* @return the newly constructed child Node, or null if we couldn't allocate resources.
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*/
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public DistortedNode attach(DistortedInputSurface surface, DistortedEffects effects, MeshObject mesh)
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{
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DistortedNode node = new DistortedNode(surface,effects,mesh);
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DistortedAttachDaemon.attach(this,node);
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return node;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* This is not really part of the public API. Has to be public only because it is a part of the
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* DistortedAttacheable interface, which should really be a class that we extend here instead but
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* Java has no multiple inheritance.
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*
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* @param node The new Node to add.
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*/
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public void attachNow(DistortedNode node)
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{
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if( mChildren==null ) mChildren = new ArrayList<>(2);
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node.mParent = this;
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mChildren.add(node);
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mNumChildren[0]++;
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adjustIsomorphism();
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Removes the first occurrence of a specified child from the list of children of our Node.
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* <p>
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* We cannot do this mid-render - actual detachment will be done just before the next render, by the
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* DistortedAttachDeamon (by calling detachNow())
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*
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* @param node The Node to remove.
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*/
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public void detach(DistortedNode node)
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{
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DistortedAttachDaemon.detach(this,node);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Removes the first occurrence of a specified child from the list of children of our Node.
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* <p>
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* A bit questionable method as there can be many different Nodes attached as children, some
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* of them having the same Effects but - for instance - different Mesh. Use with care.
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* <p>
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* We cannot do this mid-render - actual detachment will be done just before the next render, by the
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* DistortedAttachDeamon (by calling detachNow())
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*
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* @param effects DistortedEffects to remove.
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*/
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public void detach(DistortedEffects effects)
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{
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long id = effects.getID();
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DistortedNode node;
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for(int i=0; i<mNumChildren[0]; i++)
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{
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node = mChildren.get(i);
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if( node.mEffects.getID()==id )
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{
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DistortedAttachDaemon.detach(this,node);
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break;
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* This is not really part of the public API. Has to be public only because it is a part of the
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437
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* DistortedAttacheable interface, which should really be a class that we extend here instead but
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* Java has no multiple inheritance.
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*
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* @param node The Node to remove.
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*/
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public void detachNow(DistortedNode node)
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{
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if( mNumChildren[0]>0 && mChildren.remove(node) )
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{
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node.mParent = null;
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mNumChildren[0]--;
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adjustIsomorphism();
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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453
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/**
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454
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* Removes all children Nodes.
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* <p>
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* We cannot do this mid-render - actual detachment will be done just before the next render, by the
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* DistortedAttachDeamon (by calling detachAllNow())
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*/
|
459
|
public void detachAll()
|
460
|
{
|
461
|
DistortedAttachDaemon.detachAll(this);
|
462
|
}
|
463
|
|
464
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
465
|
/**
|
466
|
* This is not really part of the public API. Has to be public only because it is a part of the
|
467
|
* DistortedAttacheable interface, which should really be a class that we extend here instead but
|
468
|
* Java has no multiple inheritance.
|
469
|
*/
|
470
|
public void detachAllNow()
|
471
|
{
|
472
|
if( mNumChildren[0]>0 )
|
473
|
{
|
474
|
DistortedNode tmp;
|
475
|
|
476
|
for(int i=mNumChildren[0]-1; i>=0; i--)
|
477
|
{
|
478
|
tmp = mChildren.remove(i);
|
479
|
tmp.mParent = null;
|
480
|
}
|
481
|
|
482
|
mNumChildren[0] = 0;
|
483
|
adjustIsomorphism();
|
484
|
}
|
485
|
}
|
486
|
|
487
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
488
|
/**
|
489
|
* Returns the DistortedEffects object that's in the Node.
|
490
|
*
|
491
|
* @return The DistortedEffects contained in the Node.
|
492
|
*/
|
493
|
public DistortedEffects getEffects()
|
494
|
{
|
495
|
return mEffects;
|
496
|
}
|
497
|
|
498
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
499
|
/**
|
500
|
* Returns the DistortedInputSurface object that's in the Node.
|
501
|
*
|
502
|
* @return The DistortedInputSurface contained in the Node.
|
503
|
*/
|
504
|
public DistortedInputSurface getSurface()
|
505
|
{
|
506
|
return mSurface;
|
507
|
}
|
508
|
|
509
|
///////////////////////////////////////////////////////////////////////////////////////////////////
|
510
|
/**
|
511
|
* Returns the DistortedFramebuffer object that's in the Node.
|
512
|
*
|
513
|
* @return The DistortedFramebuffer contained in the Node.
|
514
|
*/
|
515
|
public DistortedFramebuffer getFramebuffer()
|
516
|
{
|
517
|
return mData.mFBO;
|
518
|
}
|
519
|
|
520
|
}
|