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(0) {}
31
32FboCache::~FboCache() {
33    clear();
34}
35
36///////////////////////////////////////////////////////////////////////////////
37// Size management
38///////////////////////////////////////////////////////////////////////////////
39
40uint32_t FboCache::getSize() {
41    return mCache.size();
42}
43
44uint32_t FboCache::getMaxSize() {
45    return mMaxSize;
46}
47
48///////////////////////////////////////////////////////////////////////////////
49// Caching
50///////////////////////////////////////////////////////////////////////////////
51
52void 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
60GLuint 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
71bool 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