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      1 /*
      2  * Copyright (C) 2010 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 #include <stdlib.h>
     18 
     19 #include "Debug.h"
     20 #include "FboCache.h"
     21 #include "Properties.h"
     22 
     23 namespace android {
     24 namespace uirenderer {
     25 
     26 ///////////////////////////////////////////////////////////////////////////////
     27 // Constructors/destructor
     28 ///////////////////////////////////////////////////////////////////////////////
     29 
     30 FboCache::FboCache()
     31         : mMaxSize(Properties::fboCacheSize) {}
     32 
     33 FboCache::~FboCache() {
     34     clear();
     35 }
     36 
     37 ///////////////////////////////////////////////////////////////////////////////
     38 // Size management
     39 ///////////////////////////////////////////////////////////////////////////////
     40 
     41 uint32_t FboCache::getSize() {
     42     return mCache.size();
     43 }
     44 
     45 uint32_t FboCache::getMaxSize() {
     46     return mMaxSize;
     47 }
     48 
     49 ///////////////////////////////////////////////////////////////////////////////
     50 // Caching
     51 ///////////////////////////////////////////////////////////////////////////////
     52 
     53 void FboCache::clear() {
     54     for (size_t i = 0; i < mCache.size(); i++) {
     55         const GLuint fbo = mCache.itemAt(i);
     56         glDeleteFramebuffers(1, &fbo);
     57     }
     58     mCache.clear();
     59 }
     60 
     61 GLuint FboCache::get() {
     62     GLuint fbo;
     63     if (mCache.size() > 0) {
     64         fbo = mCache.itemAt(mCache.size() - 1);
     65         mCache.removeAt(mCache.size() - 1);
     66     } else {
     67         glGenFramebuffers(1, &fbo);
     68     }
     69     return fbo;
     70 }
     71 
     72 bool FboCache::put(GLuint fbo) {
     73     if (mCache.size() < mMaxSize) {
     74         mCache.add(fbo);
     75         return true;
     76     }
     77 
     78     glDeleteFramebuffers(1, &fbo);
     79     return false;
     80 }
     81 
     82 }; // namespace uirenderer
     83 }; // namespace android
     84