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()
31        : mMaxSize(Properties::fboCacheSize) {}
32
33FboCache::~FboCache() {
34    clear();
35}
36
37///////////////////////////////////////////////////////////////////////////////
38// Size management
39///////////////////////////////////////////////////////////////////////////////
40
41uint32_t FboCache::getSize() {
42    return mCache.size();
43}
44
45uint32_t FboCache::getMaxSize() {
46    return mMaxSize;
47}
48
49///////////////////////////////////////////////////////////////////////////////
50// Caching
51///////////////////////////////////////////////////////////////////////////////
52
53void 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
61GLuint 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
72bool 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