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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*
* 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_PATH_CACHE_H
#define ANDROID_HWUI_PATH_CACHE_H
#include <SkBitmap.h>
#include <SkPaint.h>
#include <SkPath.h>
#include "Texture.h"
#include "utils/Compare.h"
#include "utils/GenerationCache.h"
namespace android {
namespace uirenderer {
/**
* Describe a path in the path cache.
*/
struct PathCacheEntry {
PathCacheEntry() {
path = NULL;
join = SkPaint::kDefault_Join;
cap = SkPaint::kDefault_Cap;
style = SkPaint::kFill_Style;
miter = 4.0f;
strokeWidth = 1.0f;
}
PathCacheEntry(const PathCacheEntry& entry):
path(entry.path), join(entry.join), cap(entry.cap),
style(entry.style), miter(entry.miter),
strokeWidth(entry.strokeWidth) {
}
PathCacheEntry(SkPath* path, SkPaint* paint) {
this->path = path;
join = paint->getStrokeJoin();
cap = paint->getStrokeCap();
miter = paint->getStrokeMiter();
strokeWidth = paint->getStrokeWidth();
style = paint->getStyle();
}
SkPath* path;
SkPaint::Join join;
SkPaint::Cap cap;
SkPaint::Style style;
float miter;
float strokeWidth;
bool operator<(const PathCacheEntry& rhs) const {
LTE_INT(path) {
LTE_INT(join) {
LTE_INT(cap) {
LTE_INT(style) {
LTE_FLOAT(miter) {
LTE_FLOAT(strokeWidth) return false;
}
}
}
}
}
return false;
}
}; // struct PathCacheEntry
/**
* Alpha texture used to represent a path.
*/
struct PathTexture: public Texture {
PathTexture(): Texture() {
}
/**
* Left coordinate of the path bounds.
*/
float left;
/**
* Top coordinate of the path bounds.
*/
float top;
/**
* Offset to draw the path at the correct origin.
*/
float offset;
}; // struct PathTexture
/**
* A simple LRU path cache. The cache has a maximum size expressed in bytes.
* Any texture added to the cache causing the cache to grow beyond the maximum
* allowed size will also cause the oldest texture to be kicked out.
*/
class PathCache: public OnEntryRemoved<PathCacheEntry, PathTexture*> {
public:
PathCache();
PathCache(uint32_t maxByteSize);
~PathCache();
/**
* Used as a callback when an entry is removed from the cache.
* Do not invoke directly.
*/
void operator()(PathCacheEntry& path, PathTexture*& texture);
/**
* Returns the texture associated with the specified path. If the texture
* cannot be found in the cache, a new texture is generated.
*/
PathTexture* get(SkPath* path, SkPaint* paint);
/**
* Clears the cache. This causes all textures to be deleted.
*/
void clear();
/**
* Removes an entry.
*/
void remove(SkPath* path);
/**
* 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();
private:
/**
* Generates the texture from a bitmap into the specified texture structure.
*/
void generateTexture(SkBitmap& bitmap, Texture* texture);
PathTexture* addTexture(const PathCacheEntry& entry, const SkPath *path, const SkPaint* paint);
void init();
GenerationCache<PathCacheEntry, PathTexture*> mCache;
uint32_t mSize;
uint32_t mMaxSize;
GLuint mMaxTextureSize;
/**
* Used to access mCache and mSize. All methods are accessed from a single
* thread except for remove().
*/
mutable Mutex mLock;
}; // class PathCache
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_PATH_CACHE_H
|
