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
|
/*
* 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.
*/
#define LOG_TAG "OpenGLRenderer"
#include "TextDropShadowCache.h"
#include "Properties.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Constructors/destructor
///////////////////////////////////////////////////////////////////////////////
TextDropShadowCache::TextDropShadowCache():
mCache(GenerationCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity),
mSize(0), mMaxSize(MB(DEFAULT_DROP_SHADOW_CACHE_SIZE)) {
char property[PROPERTY_VALUE_MAX];
if (property_get(PROPERTY_DROP_SHADOW_CACHE_SIZE, property, NULL) > 0) {
LOGD(" Setting drop shadow cache size to %sMB", property);
setMaxSize(MB(atof(property)));
} else {
LOGD(" Using default drop shadow cache size of %.2fMB", DEFAULT_DROP_SHADOW_CACHE_SIZE);
}
mCache.setOnEntryRemovedListener(this);
}
TextDropShadowCache::TextDropShadowCache(uint32_t maxByteSize):
mCache(GenerationCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity),
mSize(0), mMaxSize(maxByteSize) {
mCache.setOnEntryRemovedListener(this);
}
TextDropShadowCache::~TextDropShadowCache() {
mCache.clear();
}
///////////////////////////////////////////////////////////////////////////////
// Size management
///////////////////////////////////////////////////////////////////////////////
uint32_t TextDropShadowCache::getSize() {
return mSize;
}
uint32_t TextDropShadowCache::getMaxSize() {
return mMaxSize;
}
void TextDropShadowCache::setMaxSize(uint32_t maxSize) {
mMaxSize = maxSize;
while (mSize > mMaxSize) {
mCache.removeOldest();
}
}
///////////////////////////////////////////////////////////////////////////////
// Callbacks
///////////////////////////////////////////////////////////////////////////////
void TextDropShadowCache::operator()(ShadowText& text, ShadowTexture*& texture) {
if (texture) {
const uint32_t size = texture->width * texture->height;
mSize -= size;
glDeleteTextures(1, &texture->id);
delete texture;
}
}
///////////////////////////////////////////////////////////////////////////////
// Caching
///////////////////////////////////////////////////////////////////////////////
void TextDropShadowCache::clear() {
mCache.clear();
}
ShadowTexture* TextDropShadowCache::get(SkPaint* paint, const char* text, uint32_t len,
int numGlyphs, uint32_t radius) {
ShadowText entry(paint, radius, len, text);
ShadowTexture* texture = mCache.get(entry);
if (!texture) {
FontRenderer::DropShadow shadow = mRenderer->renderDropShadow(paint, text, 0,
len, numGlyphs, radius);
texture = new ShadowTexture;
texture->left = shadow.penX;
texture->top = shadow.penY;
texture->width = shadow.width;
texture->height = shadow.height;
texture->generation = 0;
texture->blend = true;
const uint32_t size = shadow.width * shadow.height;
// Don't even try to cache a bitmap that's bigger than the cache
if (size < mMaxSize) {
while (mSize + size > mMaxSize) {
mCache.removeOldest();
}
}
glGenTextures(1, &texture->id);
glBindTexture(GL_TEXTURE_2D, texture->id);
// Textures are Alpha8
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, texture->width, texture->height, 0,
GL_ALPHA, GL_UNSIGNED_BYTE, shadow.image);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
if (size < mMaxSize) {
mSize += size;
mCache.put(entry, texture);
} else {
texture->cleanup = true;
}
// Cleanup shadow
delete[] shadow.image;
}
return texture;
}
}; // namespace uirenderer
}; // namespace android
|
