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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
      5  * in compliance with the License. You may obtain a copy of the License at
      6  *
      7  * http://www.apache.org/licenses/LICENSE-2.0
      8  *
      9  * Unless required by applicable law or agreed to in writing, software distributed under the License
     10  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
     11  * or implied. See the License for the specific language governing permissions and limitations under
     12  * the License.
     13  */
     14 #include "Scene.h"
     15 
     16 #include <graphics/GLUtils.h>
     17 #include <graphics/ProgramNode.h>
     18 
     19 #include <Trace.h>
     20 
     21 Scene::Scene(int width, int height) :
     22         mWidth(width), mHeight(height) {
     23 }
     24 
     25 bool Scene::setUpContext() {
     26     SCOPED_TRACE();
     27     if (!setUpPrograms()) {
     28         return false;
     29     }
     30     mModelMatrix = setUpModelMatrix();
     31     if (mModelMatrix == NULL) {
     32         return false;
     33     }
     34     mViewMatrix = setUpViewMatrix();
     35     if (mViewMatrix == NULL) {
     36         return false;
     37     }
     38     mProjectionMatrix = setUpProjectionMatrix(mWidth, mHeight);
     39     if (mProjectionMatrix == NULL) {
     40         return false;
     41     }
     42     return true;
     43 }
     44 
     45 bool Scene::tearDown() {
     46     SCOPED_TRACE();
     47     for (size_t i = 0; i < mTextureIds.size(); i++) {
     48         glDeleteTextures(1, &(mTextureIds[i]));
     49     }
     50     for (size_t i = 0; i < mMeshes.size(); i++) {
     51         delete mMeshes[i];
     52     }
     53     for (size_t i = 0; i < mSceneGraphs.size(); i++) {
     54         delete mSceneGraphs[i];
     55     }
     56     delete mModelMatrix;
     57     mModelMatrix = NULL;
     58     delete mViewMatrix;
     59     mViewMatrix = NULL;
     60     delete mProjectionMatrix;
     61     mProjectionMatrix = NULL;
     62     return true;
     63 }
     64 
     65 bool Scene::update(int frame) {
     66     SCOPED_TRACE();
     67     // Delete the old scene graphs.
     68     for (size_t i = 0; i < mSceneGraphs.size(); i++) {
     69         delete mSceneGraphs[i];
     70     }
     71     mSceneGraphs.clear();
     72     return updateSceneGraphs(frame);
     73 }
     74 
     75 void Scene::drawSceneGraph(int index) {
     76     mModelMatrix->identity();
     77     mSceneGraphs[index]->drawProgram(*mModelMatrix, *mViewMatrix, *mProjectionMatrix);
     78 }
     79