1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_HWUI_LAYER_CACHE_H
#define ANDROID_HWUI_LAYER_CACHE_H
#include "Debug.h"
#include "Layer.h"
#include "Properties.h"
#include "utils/SortedList.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Defines
///////////////////////////////////////////////////////////////////////////////
// Debug
#if DEBUG_LAYERS
#define LAYER_LOGD(...) LOGD(__VA_ARGS__)
#else
#define LAYER_LOGD(...)
#endif
///////////////////////////////////////////////////////////////////////////////
// Cache
///////////////////////////////////////////////////////////////////////////////
class LayerCache {
public:
LayerCache();
~LayerCache();
/**
* Returns a layer large enough for the specified dimensions. If no suitable
* layer can be found, a new one is created and returned. If creating a new
* layer fails, NULL is returned.
*
* When a layer is obtained from the cache, it is removed and the total
* size of the cache goes down.
*
* @param width The desired width of the layer
* @param width The desired height of the layer
*/
Layer* get(const uint32_t width, const uint32_t height);
/**
* Adds the layer to the cache. The layer will not be added if there is
* not enough space available. Adding a layer can cause other layers to
* be removed from the cache.
*
* @param layer The layer to add to the cache
*
* @return True if the layer was added, false otherwise.
*/
bool put(Layer* layer);
/**
* Clears the cache. This causes all layers to be deleted.
*/
void clear();
/**
* Resize the specified layer if needed.
*
* @param layer The layer to resize
* @param width The new width of the layer
* @param height The new height of the layer
*
* @return True if the layer was resized or nothing happened, false if
* a failure occurred during the resizing operation
*/
bool resize(Layer* layer, const uint32_t width, const uint32_t height);
/**
* Sets the maximum size of the cache in bytes.
*/
void setMaxSize(uint32_t maxSize);
/**
* Returns the maximum size of the cache in bytes.
*/
uint32_t getMaxSize();
/**
* Returns the current size of the cache in bytes.
*/
uint32_t getSize();
/**
* Prints out the content of the cache.
*/
void dump();
private:
void deleteLayer(Layer* layer);
struct LayerEntry {
LayerEntry():
mLayer(NULL), mWidth(0), mHeight(0) {
}
LayerEntry(const uint32_t layerWidth, const uint32_t layerHeight): mLayer(NULL) {
mWidth = uint32_t(ceilf(layerWidth / float(LAYER_SIZE)) * LAYER_SIZE);
mHeight = uint32_t(ceilf(layerHeight / float(LAYER_SIZE)) * LAYER_SIZE);
}
LayerEntry(Layer* layer):
mLayer(layer), mWidth(layer->getWidth()), mHeight(layer->getHeight()) {
}
bool operator<(const LayerEntry& rhs) const {
if (mWidth == rhs.mWidth) {
return mHeight < rhs.mHeight;
}
return mWidth < rhs.mWidth;
}
bool operator==(const LayerEntry& rhs) const {
return mWidth == rhs.mWidth && mHeight == rhs.mHeight;
}
Layer* mLayer;
uint32_t mWidth;
uint32_t mHeight;
}; // struct LayerEntry
SortedList<LayerEntry> mCache;
uint32_t mSize;
uint32_t mMaxSize;
}; // class LayerCache
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_LAYER_CACHE_H
|
