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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.scenegraph;
     18 
     19 import java.lang.Math;
     20 import java.util.ArrayList;
     21 
     22 import android.renderscript.*;
     23 import android.renderscript.Matrix4f;
     24 import android.util.Log;
     25 
     26 /**
     27  * @hide
     28  */
     29 public abstract class Transform extends SceneGraphBase {
     30     Transform mParent;
     31     ArrayList<Transform> mChildren;
     32 
     33     ScriptField_SgTransform mField;
     34     ScriptField_SgTransform.Item mTransformData;
     35 
     36     public Transform() {
     37         mChildren = new ArrayList<Transform>();
     38         mParent = null;
     39     }
     40 
     41     public void appendChild(Transform t) {
     42         mChildren.add(t);
     43         t.mParent = this;
     44         updateRSChildData(true);
     45     }
     46 
     47     abstract void initLocalData();
     48 
     49     void updateRSChildData(boolean copyData) {
     50         if (mField == null) {
     51             return;
     52         }
     53         RenderScriptGL rs = SceneManager.getRS();
     54         if (mChildren.size() != 0) {
     55             Allocation childRSData = Allocation.createSized(rs, Element.ALLOCATION(rs),
     56                                                             mChildren.size());
     57             mTransformData.children = childRSData;
     58 
     59             Allocation[] childrenAllocs = new Allocation[mChildren.size()];
     60             for (int i = 0; i < mChildren.size(); i ++) {
     61                 Transform child = mChildren.get(i);
     62                 childrenAllocs[i] = child.getRSData().getAllocation();
     63             }
     64             childRSData.copyFrom(childrenAllocs);
     65         }
     66         if (copyData) {
     67             mField.set(mTransformData, 0, true);
     68         }
     69     }
     70 
     71     ScriptField_SgTransform getRSData() {
     72         if (mField != null) {
     73             return mField;
     74         }
     75 
     76         RenderScriptGL rs = SceneManager.getRS();
     77         if (rs == null) {
     78             return null;
     79         }
     80         mField = new ScriptField_SgTransform(rs, 1);
     81 
     82         mTransformData = new ScriptField_SgTransform.Item();
     83         mTransformData.name = getNameAlloc(rs);
     84         mTransformData.isDirty = 1;
     85         mTransformData.timestamp = 1;
     86 
     87         initLocalData();
     88         updateRSChildData(false);
     89 
     90         mField.set(mTransformData, 0, true);
     91         return mField;
     92     }
     93 }
     94 
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     99