Home | History | Annotate | Download | only in hwui 
      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() : mMaxSize(0) {}
     31 
     32 FboCache::~FboCache() {
     33     clear();
     34 }
     35 
     36 ///////////////////////////////////////////////////////////////////////////////
     37 // Size management
     38 ///////////////////////////////////////////////////////////////////////////////
     39 
     40 uint32_t FboCache::getSize() {
     41     return mCache.size();
     42 }
     43 
     44 uint32_t FboCache::getMaxSize() {
     45     return mMaxSize;
     46 }
     47 
     48 ///////////////////////////////////////////////////////////////////////////////
     49 // Caching
     50 ///////////////////////////////////////////////////////////////////////////////
     51 
     52 void FboCache::clear() {
     53     for (size_t i = 0; i < mCache.size(); i++) {
     54         const GLuint fbo = mCache.itemAt(i);
     55         glDeleteFramebuffers(1, &fbo);
     56     }
     57     mCache.clear();
     58 }
     59 
     60 GLuint FboCache::get() {
     61     GLuint fbo;
     62     if (mCache.size() > 0) {
     63         fbo = mCache.itemAt(mCache.size() - 1);
     64         mCache.removeAt(mCache.size() - 1);
     65     } else {
     66         glGenFramebuffers(1, &fbo);
     67     }
     68     return fbo;
     69 }
     70 
     71 bool FboCache::put(GLuint fbo) {
     72     if (mCache.size() < mMaxSize) {
     73         mCache.add(fbo);
     74         return true;
     75     }
     76 
     77     glDeleteFramebuffers(1, &fbo);
     78     return false;
     79 }
     80 
     81 };  // namespace uirenderer
     82 };  // namespace android
     83