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
174
175
176
177
178
179
180
181
182
183
184
185
186
|
#include "SkImageRefPool.h"
#include "SkImageRef.h"
#include "SkThread.h"
SkImageRefPool::SkImageRefPool() {
fRAMBudget = 0; // means no explicit limit
fRAMUsed = 0;
fCount = 0;
fHead = fTail = NULL;
}
SkImageRefPool::~SkImageRefPool() {
// SkASSERT(NULL == fHead);
}
void SkImageRefPool::setRAMBudget(size_t size) {
if (fRAMBudget != size) {
fRAMBudget = size;
this->purgeIfNeeded();
}
}
void SkImageRefPool::justAddedPixels(SkImageRef* ref) {
#ifdef DUMP_IMAGEREF_LIFECYCLE
SkDebugf("=== ImagePool: add pixels %s [%d %d %d] bytes=%d heap=%d\n",
ref->getURI(),
ref->fBitmap.width(), ref->fBitmap.height(),
ref->fBitmap.bytesPerPixel(),
ref->fBitmap.getSize(), (int)fRAMUsed);
#endif
fRAMUsed += ref->ramUsed();
this->purgeIfNeeded();
}
void SkImageRefPool::canLosePixels(SkImageRef* ref) {
// the refs near fHead have recently been released (used)
// if we purge, we purge from the tail
this->detach(ref);
this->addToHead(ref);
this->purgeIfNeeded();
}
void SkImageRefPool::purgeIfNeeded() {
// do nothing if we have a zero-budget (i.e. unlimited)
if (fRAMBudget != 0) {
this->setRAMUsed(fRAMBudget);
}
}
void SkImageRefPool::setRAMUsed(size_t limit) {
SkImageRef* ref = fTail;
while (NULL != ref && fRAMUsed > limit) {
// only purge it if its pixels are unlocked
if (0 == ref->getLockCount() && ref->fBitmap.getPixels()) {
size_t size = ref->ramUsed();
SkASSERT(size <= fRAMUsed);
fRAMUsed -= size;
#ifdef DUMP_IMAGEREF_LIFECYCLE
SkDebugf("=== ImagePool: purge %s [%d %d %d] bytes=%d heap=%d\n",
ref->getURI(),
ref->fBitmap.width(), ref->fBitmap.height(),
ref->fBitmap.bytesPerPixel(),
(int)size, (int)fRAMUsed);
#endif
// remember the bitmap config (don't call reset),
// just clear the pixel memory
ref->fBitmap.setPixels(NULL);
SkASSERT(NULL == ref->fBitmap.getPixels());
}
ref = ref->fPrev;
}
}
///////////////////////////////////////////////////////////////////////////////
void SkImageRefPool::addToHead(SkImageRef* ref) {
ref->fNext = fHead;
ref->fPrev = NULL;
if (fHead) {
SkASSERT(NULL == fHead->fPrev);
fHead->fPrev = ref;
}
fHead = ref;
if (NULL == fTail) {
fTail = ref;
}
fCount += 1;
SkASSERT(computeCount() == fCount);
fRAMUsed += ref->ramUsed();
}
void SkImageRefPool::addToTail(SkImageRef* ref) {
ref->fNext = NULL;
ref->fPrev = fTail;
if (fTail) {
SkASSERT(NULL == fTail->fNext);
fTail->fNext = ref;
}
fTail = ref;
if (NULL == fHead) {
fHead = ref;
}
fCount += 1;
SkASSERT(computeCount() == fCount);
fRAMUsed += ref->ramUsed();
}
void SkImageRefPool::detach(SkImageRef* ref) {
SkASSERT(fCount > 0);
if (fHead == ref) {
fHead = ref->fNext;
}
if (fTail == ref) {
fTail = ref->fPrev;
}
if (ref->fPrev) {
ref->fPrev->fNext = ref->fNext;
}
if (ref->fNext) {
ref->fNext->fPrev = ref->fPrev;
}
ref->fNext = ref->fPrev = NULL;
fCount -= 1;
SkASSERT(computeCount() == fCount);
SkASSERT(fRAMUsed >= ref->ramUsed());
fRAMUsed -= ref->ramUsed();
}
int SkImageRefPool::computeCount() const {
SkImageRef* ref = fHead;
int count = 0;
while (ref != NULL) {
count += 1;
ref = ref->fNext;
}
#ifdef SK_DEBUG
ref = fTail;
int count2 = 0;
while (ref != NULL) {
count2 += 1;
ref = ref->fPrev;
}
SkASSERT(count2 == count);
#endif
return count;
}
///////////////////////////////////////////////////////////////////////////////
#include "SkStream.h"
void SkImageRefPool::dump() const {
#if defined(SK_DEBUG) || defined(DUMP_IMAGEREF_LIFECYCLE)
SkDebugf("ImagePool dump: bugdet: %d used: %d count: %d\n",
(int)fRAMBudget, (int)fRAMUsed, fCount);
SkImageRef* ref = fHead;
while (ref != NULL) {
SkDebugf(" [%3d %3d %d] ram=%d data=%d locks=%d %s\n", ref->fBitmap.width(),
ref->fBitmap.height(), ref->fBitmap.config(),
ref->ramUsed(), (int)ref->fStream->getLength(),
ref->getLockCount(), ref->getURI());
ref = ref->fNext;
}
#endif
}
|
