FboCache.cpp revision 5a4690bf26932c0d6940e4af8516d920e09ae81a 
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
23namespace android {
24namespace uirenderer {
25
26///////////////////////////////////////////////////////////////////////////////
27// Constructors/destructor
28///////////////////////////////////////////////////////////////////////////////
29
30FboCache::FboCache(): mMaxSize(DEFAULT_FBO_CACHE_SIZE) {
31    char property[PROPERTY_VALUE_MAX];
32    if (property_get(PROPERTY_FBO_CACHE_SIZE, property, nullptr) > 0) {
33        INIT_LOGD("  Setting fbo cache size to %s", property);
34        mMaxSize = atoi(property);
35    } else {
36        INIT_LOGD("  Using default fbo cache size of %d", DEFAULT_FBO_CACHE_SIZE);
37    }
38}
39
40FboCache::~FboCache() {
41    clear();
42}
43
44///////////////////////////////////////////////////////////////////////////////
45// Size management
46///////////////////////////////////////////////////////////////////////////////
47
48uint32_t FboCache::getSize() {
49    return mCache.size();
50}
51
52uint32_t FboCache::getMaxSize() {
53    return mMaxSize;
54}
55
56///////////////////////////////////////////////////////////////////////////////
57// Caching
58///////////////////////////////////////////////////////////////////////////////
59
60void FboCache::clear() {
61    for (size_t i = 0; i < mCache.size(); i++) {
62        const GLuint fbo = mCache.itemAt(i);
63        glDeleteFramebuffers(1, &fbo);
64    }
65    mCache.clear();
66}
67
68GLuint FboCache::get() {
69    GLuint fbo;
70    if (mCache.size() > 0) {
71        fbo = mCache.itemAt(mCache.size() - 1);
72        mCache.removeAt(mCache.size() - 1);
73    } else {
74        glGenFramebuffers(1, &fbo);
75    }
76    return fbo;
77}
78
79bool FboCache::put(GLuint fbo) {
80    if (mCache.size() < mMaxSize) {
81        mCache.add(fbo);
82        return true;
83    }
84
85    glDeleteFramebuffers(1, &fbo);
86    return false;
87}
88
89}; // namespace uirenderer
90}; // namespace android
91