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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrAtlas.h"
#include "GrGpu.h"
#include "GrRectanizer.h"
#include "GrTextStrike.h"
#include "GrTextStrike_impl.h"
#include "GrRect.h"
SK_DEFINE_INST_COUNT(GrFontScaler)
SK_DEFINE_INST_COUNT(GrKey)
///////////////////////////////////////////////////////////////////////////////
GrFontCache::GrFontCache(GrGpu* gpu) : fGpu(gpu) {
gpu->ref();
fAtlasMgr = NULL;
fHead = fTail = NULL;
}
GrFontCache::~GrFontCache() {
fCache.deleteAll();
delete fAtlasMgr;
fGpu->unref();
}
GrTextStrike* GrFontCache::generateStrike(GrFontScaler* scaler,
const Key& key) {
if (NULL == fAtlasMgr) {
fAtlasMgr = SkNEW_ARGS(GrAtlasMgr, (fGpu));
}
GrTextStrike* strike = SkNEW_ARGS(GrTextStrike,
(this, scaler->getKey(),
scaler->getMaskFormat(), fAtlasMgr));
fCache.insert(key, strike);
if (fHead) {
fHead->fPrev = strike;
} else {
GrAssert(NULL == fTail);
fTail = strike;
}
strike->fPrev = NULL;
strike->fNext = fHead;
fHead = strike;
return strike;
}
void GrFontCache::freeAll() {
fCache.deleteAll();
delete fAtlasMgr;
fAtlasMgr = NULL;
fHead = NULL;
fTail = NULL;
}
void GrFontCache::purgeExceptFor(GrTextStrike* preserveStrike) {
GrTextStrike* strike = fTail;
while (strike) {
if (strike == preserveStrike) {
strike = strike->fPrev;
continue;
}
GrTextStrike* strikeToPurge = strike;
// keep going if we won't free up any atlases with this strike.
strike = (NULL == strikeToPurge->fAtlas) ? strikeToPurge->fPrev : NULL;
int index = fCache.slowFindIndex(strikeToPurge);
GrAssert(index >= 0);
fCache.removeAt(index, strikeToPurge->fFontScalerKey->getHash());
this->detachStrikeFromList(strikeToPurge);
delete strikeToPurge;
}
}
#if GR_DEBUG
void GrFontCache::validate() const {
int count = fCache.count();
if (0 == count) {
GrAssert(!fHead);
GrAssert(!fTail);
} else if (1 == count) {
GrAssert(fHead == fTail);
} else {
GrAssert(fHead != fTail);
}
int count2 = 0;
const GrTextStrike* strike = fHead;
while (strike) {
count2 += 1;
strike = strike->fNext;
}
GrAssert(count == count2);
count2 = 0;
strike = fTail;
while (strike) {
count2 += 1;
strike = strike->fPrev;
}
GrAssert(count == count2);
}
#endif
///////////////////////////////////////////////////////////////////////////////
#if GR_DEBUG
static int gCounter;
#endif
/*
The text strike is specific to a given font/style/matrix setup, which is
represented by the GrHostFontScaler object we are given in getGlyph().
We map a 32bit glyphID to a GrGlyph record, which in turn points to a
atlas and a position within that texture.
*/
GrTextStrike::GrTextStrike(GrFontCache* cache, const GrKey* key,
GrMaskFormat format,
GrAtlasMgr* atlasMgr) : fPool(64) {
fFontScalerKey = key;
fFontScalerKey->ref();
fFontCache = cache; // no need to ref, it won't go away before we do
fAtlasMgr = atlasMgr; // no need to ref, it won't go away before we do
fAtlas = NULL;
fMaskFormat = format;
#if GR_DEBUG
// GrPrintf(" GrTextStrike %p %d\n", this, gCounter);
gCounter += 1;
#endif
}
static void FreeGlyph(GrGlyph*& glyph) { glyph->free(); }
GrTextStrike::~GrTextStrike() {
GrAtlas::FreeLList(fAtlas);
fFontScalerKey->unref();
fCache.getArray().visit(FreeGlyph);
#if GR_DEBUG
gCounter -= 1;
// GrPrintf("~GrTextStrike %p %d\n", this, gCounter);
#endif
}
GrGlyph* GrTextStrike::generateGlyph(GrGlyph::PackedID packed,
GrFontScaler* scaler) {
GrIRect bounds;
if (!scaler->getPackedGlyphBounds(packed, &bounds)) {
return NULL;
}
GrGlyph* glyph = fPool.alloc();
glyph->init(packed, bounds);
fCache.insert(packed, glyph);
return glyph;
}
bool GrTextStrike::getGlyphAtlas(GrGlyph* glyph, GrFontScaler* scaler) {
#if 0 // testing hack to force us to flush our cache often
static int gCounter;
if ((++gCounter % 10) == 0) return false;
#endif
GrAssert(glyph);
GrAssert(scaler);
GrAssert(fCache.contains(glyph));
if (glyph->fAtlas) {
return true;
}
GrAutoRef ar(scaler);
int bytesPerPixel = GrMaskFormatBytesPerPixel(fMaskFormat);
size_t size = glyph->fBounds.area() * bytesPerPixel;
SkAutoSMalloc<1024> storage(size);
if (!scaler->getPackedGlyphImage(glyph->fPackedID, glyph->width(),
glyph->height(),
glyph->width() * bytesPerPixel,
storage.get())) {
return false;
}
GrAtlas* atlas = fAtlasMgr->addToAtlas(fAtlas, glyph->width(),
glyph->height(), storage.get(),
fMaskFormat,
&glyph->fAtlasLocation);
if (NULL == atlas) {
return false;
}
// update fAtlas as well, since they may be chained in a linklist
glyph->fAtlas = fAtlas = atlas;
return true;
}
|
