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
|
/*
* 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_GRADIENT_CACHE_H
#define ANDROID_HWUI_GRADIENT_CACHE_H
#include <SkShader.h>
#include <utils/Vector.h>
#include "Texture.h"
#include "utils/Compare.h"
#include "utils/GenerationCache.h"
namespace android {
namespace uirenderer {
struct GradientCacheEntry {
GradientCacheEntry() {
count = 0;
colors = NULL;
positions = NULL;
tileMode = SkShader::kClamp_TileMode;
}
GradientCacheEntry(uint32_t* colors, float* positions, int count,
SkShader::TileMode tileMode) {
this->count = count;
this->colors = new uint32_t[count];
this->positions = new float[count];
this->tileMode = tileMode;
memcpy(this->colors, colors, count * sizeof(uint32_t));
memcpy(this->positions, positions, count * sizeof(float));
}
GradientCacheEntry(const GradientCacheEntry& entry) {
this->count = entry.count;
this->colors = new uint32_t[count];
this->positions = new float[count];
this->tileMode = entry.tileMode;
memcpy(this->colors, entry.colors, count * sizeof(uint32_t));
memcpy(this->positions, entry.positions, count * sizeof(float));
}
~GradientCacheEntry() {
if (colors) delete[] colors;
if (positions) delete[] positions;
}
bool operator<(const GradientCacheEntry& r) const {
const GradientCacheEntry& rhs = (const GradientCacheEntry&) r;
LTE_INT(count) {
LTE_INT(tileMode) {
int result = memcmp(colors, rhs.colors, count * sizeof(uint32_t));
if (result< 0) return true;
else if (result == 0) {
result = memcmp(positions, rhs.positions, count * sizeof(float));
if (result < 0) return true;
}
}
}
return false;
}
uint32_t* colors;
float* positions;
int count;
SkShader::TileMode tileMode;
}; // GradientCacheEntry
/**
* A simple LRU gradient 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 GradientCache: public OnEntryRemoved<GradientCacheEntry, Texture*> {
public:
GradientCache();
GradientCache(uint32_t maxByteSize);
~GradientCache();
/**
* Used as a callback when an entry is removed from the cache.
* Do not invoke directly.
*/
void operator()(GradientCacheEntry& shader, Texture*& texture);
/**
* Returns the texture associated with the specified shader.
*/
Texture* get(uint32_t* colors, float* positions,
int count, SkShader::TileMode tileMode = SkShader::kClamp_TileMode);
/**
* Clears the cache. This causes all textures to be deleted.
*/
void clear();
/**
* 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:
/**
* Adds a new linear gradient to the cache. The generated texture is
* returned.
*/
Texture* addLinearGradient(GradientCacheEntry& gradient,
uint32_t* colors, float* positions, int count,
SkShader::TileMode tileMode = SkShader::kClamp_TileMode);
void generateTexture(SkBitmap* bitmap, Texture* texture);
GenerationCache<GradientCacheEntry, Texture*> mCache;
uint32_t mSize;
uint32_t mMaxSize;
Vector<SkShader*> mGarbage;
mutable Mutex mLock;
}; // class GradientCache
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_GRADIENT_CACHE_H
|
