FboCache.cpp revision eb99356a0548684a501766e6a524529ab93304c8 
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#define LOG_TAG "OpenGLRenderer"
18
19#include <stdlib.h>
20
21#include "FboCache.h"
22#include "Properties.h"
23
24namespace android {
25namespace uirenderer {
26
27///////////////////////////////////////////////////////////////////////////////
28// Constructors/destructor
29///////////////////////////////////////////////////////////////////////////////
30
31FboCache::FboCache(): mMaxSize(DEFAULT_FBO_CACHE_SIZE) {
32    char property[PROPERTY_VALUE_MAX];
33    if (property_get(PROPERTY_FBO_CACHE_SIZE, property, NULL) > 0) {
34        LOGD("  Setting fbo cache size to %s", property);
35        mMaxSize = atoi(property);
36    } else {
37        LOGD("  Using default fbo cache size of %d", DEFAULT_FBO_CACHE_SIZE);
38    }
39}
40
41FboCache::~FboCache() {
42    clear();
43}
44
45///////////////////////////////////////////////////////////////////////////////
46// Size management
47///////////////////////////////////////////////////////////////////////////////
48
49uint32_t FboCache::getSize() {
50    return mCache.size();
51}
52
53uint32_t FboCache::getMaxSize() {
54    return mMaxSize;
55}
56
57///////////////////////////////////////////////////////////////////////////////
58// Caching
59///////////////////////////////////////////////////////////////////////////////
60
61void FboCache::clear() {
62    for (size_t i = 0; i < mCache.size(); i++) {
63        const GLuint fbo = mCache.itemAt(i);
64        glDeleteFramebuffers(1, &fbo);
65    }
66    mCache.clear();
67}
68
69GLuint FboCache::get() {
70    GLuint fbo;
71    if (mCache.size() > 0) {
72        fbo = mCache.itemAt(mCache.size() - 1);
73        mCache.removeAt(mCache.size() - 1);
74    } else {
75        glGenFramebuffers(1, &fbo);
76    }
77    return fbo;
78}
79
80bool FboCache::put(GLuint fbo) {
81    if (mCache.size() < mMaxSize) {
82        mCache.add(fbo);
83        return true;
84    }
85
86    glDeleteFramebuffers(1, &fbo);
87    return false;
88}
89
90}; // namespace uirenderer
91}; // namespace android
92