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
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/*
* Copyright 2008 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkFontConfigInterface.h"
#include "SkFontDescriptor.h"
#include "SkFontHost.h"
#include "SkFontHost_FreeType_common.h"
#include "SkFontStream.h"
#include "SkStream.h"
#include "SkTypeface.h"
#include "SkTypefaceCache.h"
SK_DECLARE_STATIC_MUTEX(gFontConfigInterfaceMutex);
static SkFontConfigInterface* gFontConfigInterface;
SkFontConfigInterface* SkFontConfigInterface::RefGlobal() {
SkAutoMutexAcquire ac(gFontConfigInterfaceMutex);
return SkSafeRef(gFontConfigInterface);
}
SkFontConfigInterface* SkFontConfigInterface::SetGlobal(SkFontConfigInterface* fc) {
SkAutoMutexAcquire ac(gFontConfigInterfaceMutex);
SkRefCnt_SafeAssign(gFontConfigInterface, fc);
return fc;
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
// convenience function to create the direct interface if none is installed.
extern SkFontConfigInterface* SkCreateDirectFontConfigInterface();
static SkFontConfigInterface* RefFCI() {
for (;;) {
SkFontConfigInterface* fci = SkFontConfigInterface::RefGlobal();
if (fci) {
return fci;
}
fci = SkFontConfigInterface::GetSingletonDirectInterface();
SkFontConfigInterface::SetGlobal(fci)->unref();
}
}
class FontConfigTypeface : public SkTypeface_FreeType {
SkFontConfigInterface::FontIdentity fIdentity;
SkString fFamilyName;
SkStream* fLocalStream;
public:
FontConfigTypeface(Style style,
const SkFontConfigInterface::FontIdentity& fi,
const SkString& familyName)
: INHERITED(style, SkTypefaceCache::NewFontID(), false)
, fIdentity(fi)
, fFamilyName(familyName)
, fLocalStream(NULL) {}
FontConfigTypeface(Style style, SkStream* localStream)
: INHERITED(style, SkTypefaceCache::NewFontID(), false) {
// we default to empty fFamilyName and fIdentity
fLocalStream = localStream;
SkSafeRef(localStream);
}
virtual ~FontConfigTypeface() {
SkSafeUnref(fLocalStream);
}
const SkFontConfigInterface::FontIdentity& getIdentity() const {
return fIdentity;
}
const char* getFamilyName() const { return fFamilyName.c_str(); }
SkStream* getLocalStream() const { return fLocalStream; }
bool isFamilyName(const char* name) const {
return fFamilyName.equals(name);
}
protected:
friend class SkFontHost; // hack until we can make public versions
virtual int onGetTableTags(SkFontTableTag tags[]) const SK_OVERRIDE;
virtual size_t onGetTableData(SkFontTableTag, size_t offset,
size_t length, void* data) const SK_OVERRIDE;
virtual void onGetFontDescriptor(SkFontDescriptor*, bool*) const SK_OVERRIDE;
virtual SkStream* onOpenStream(int* ttcIndex) const SK_OVERRIDE;
private:
typedef SkTypeface_FreeType INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
struct FindRec {
FindRec(const char* name, SkTypeface::Style style)
: fFamilyName(name) // don't need to make a deep copy
, fStyle(style) {}
const char* fFamilyName;
SkTypeface::Style fStyle;
};
static bool find_proc(SkTypeface* face, SkTypeface::Style style, void* ctx) {
FontConfigTypeface* fci = (FontConfigTypeface*)face;
const FindRec* rec = (const FindRec*)ctx;
return rec->fStyle == style && fci->isFamilyName(rec->fFamilyName);
}
SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace,
const char familyName[],
SkTypeface::Style style) {
SkAutoTUnref<SkFontConfigInterface> fci(RefFCI());
if (NULL == fci.get()) {
return NULL;
}
if (familyFace) {
FontConfigTypeface* fct = (FontConfigTypeface*)familyFace;
familyName = fct->getFamilyName();
}
FindRec rec(familyName, style);
SkTypeface* face = SkTypefaceCache::FindByProcAndRef(find_proc, &rec);
if (face) {
// SkDebugf("found cached face <%s> <%s> %p [%d]\n", familyName, ((FontConfigTypeface*)face)->getFamilyName(), face, face->getRefCnt());
return face;
}
SkFontConfigInterface::FontIdentity indentity;
SkString outFamilyName;
SkTypeface::Style outStyle;
if (!fci->matchFamilyName(familyName, style,
&indentity, &outFamilyName, &outStyle)) {
return NULL;
}
face = SkNEW_ARGS(FontConfigTypeface, (outStyle, indentity, outFamilyName));
SkTypefaceCache::Add(face, style);
// SkDebugf("add face <%s> <%s> %p [%d]\n", familyName, outFamilyName.c_str(), face, face->getRefCnt());
return face;
}
SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream* stream) {
if (!stream) {
return NULL;
}
const size_t length = stream->getLength();
if (!length) {
return NULL;
}
if (length >= 1024 * 1024 * 1024) {
return NULL; // don't accept too large fonts (>= 1GB) for safety.
}
// TODO should the caller give us the style?
SkTypeface::Style style = SkTypeface::kNormal;
SkTypeface* face = SkNEW_ARGS(FontConfigTypeface, (style, stream));
SkTypefaceCache::Add(face, style);
return face;
}
SkTypeface* SkFontHost::CreateTypefaceFromFile(const char path[]) {
SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path));
return stream.get() ? CreateTypefaceFromStream(stream) : NULL;
}
///////////////////////////////////////////////////////////////////////////////
SkStream* FontConfigTypeface::onOpenStream(int* ttcIndex) const {
SkStream* stream = this->getLocalStream();
if (stream) {
// TODO: fix issue 1176.
// As of now open_stream will return a stream and unwind it, but the
// SkStream is not thread safe, and if two threads use the stream they
// may collide and print preview for example could still fail,
// or there could be some failures in rendering if this stream is used
// there.
stream->rewind();
stream->ref();
// should have been provided by CreateFromStream()
*ttcIndex = 0;
} else {
SkAutoTUnref<SkFontConfigInterface> fci(RefFCI());
if (NULL == fci.get()) {
return NULL;
}
stream = fci->openStream(this->getIdentity());
*ttcIndex = this->getIdentity().fTTCIndex;
}
return stream;
}
int FontConfigTypeface::onGetTableTags(SkFontTableTag tags[]) const {
int ttcIndex;
SkAutoTUnref<SkStream> stream(this->openStream(&ttcIndex));
return stream.get()
? SkFontStream::GetTableTags(stream, ttcIndex, tags)
: 0;
}
size_t FontConfigTypeface::onGetTableData(SkFontTableTag tag, size_t offset,
size_t length, void* data) const {
int ttcIndex;
SkAutoTUnref<SkStream> stream(this->openStream(&ttcIndex));
return stream.get()
? SkFontStream::GetTableData(stream, ttcIndex,
tag, offset, length, data)
: 0;
}
void FontConfigTypeface::onGetFontDescriptor(SkFontDescriptor* desc,
bool* isLocalStream) const {
desc->setFamilyName(this->getFamilyName());
*isLocalStream = SkToBool(this->getLocalStream());
}
|
