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
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you 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 .
*/
#include "generic/geninst.h"
#include "generic/genpspgraphics.h"
#include "generic/glyphcache.hxx"
#include "vcl/sysdata.hxx"
#include "outfont.hxx"
#include "generic/printergfx.hxx"
#include "salbmp.hxx"
#include "impfont.hxx"
#include "outfont.hxx"
#include "outdev.h"
#include "fontsubset.hxx"
#include "salprn.hxx"
#include "region.h"
#include <list>
// ===========================================================================
// platform specific font substitution hooks
// ===========================================================================
struct FontSelectPatternAttributesHash
{
size_t operator()(const FontSelectPatternAttributes& rAttributes) const
{ return rAttributes.hashCode(); }
};
class FcPreMatchSubstititution
: public ImplPreMatchFontSubstitution
{
public:
bool FindFontSubstitute( FontSelectPattern& ) const;
typedef ::std::pair<FontSelectPatternAttributes, FontSelectPatternAttributes> value_type;
private:
typedef ::std::list<value_type> CachedFontMapType;
mutable CachedFontMapType maCachedFontMap;
};
class FcGlyphFallbackSubstititution
: public ImplGlyphFallbackFontSubstitution
{
// TODO: add a cache
public:
bool FindFontSubstitute( FontSelectPattern&, rtl::OUString& rMissingCodes ) const;
};
int SalGenericInstance::FetchFontSubstitutionFlags()
{
// init font substitution defaults
int nDisableBits = 0;
#ifdef SOLARIS
nDisableBits = 1; // disable "font fallback" here on default
#endif
// apply the environment variable if any
const char* pEnvStr = ::getenv( "SAL_DISABLE_FC_SUBST" );
if( pEnvStr )
{
if( (*pEnvStr >= '0') && (*pEnvStr <= '9') )
nDisableBits = (*pEnvStr - '0');
else
nDisableBits = ~0U; // no specific bits set: disable all
}
return nDisableBits;
}
void SalGenericInstance::RegisterFontSubstitutors( ImplDevFontList* pList )
{
// init font substitution defaults
int nDisableBits = 0;
#ifdef SOLARIS
nDisableBits = 1; // disable "font fallback" here on default
#endif
// apply the environment variable if any
const char* pEnvStr = ::getenv( "SAL_DISABLE_FC_SUBST" );
if( pEnvStr )
{
if( (*pEnvStr >= '0') && (*pEnvStr <= '9') )
nDisableBits = (*pEnvStr - '0');
else
nDisableBits = ~0U; // no specific bits set: disable all
}
// register font fallback substitutions (unless disabled by bit0)
if( (nDisableBits & 1) == 0 )
{
static FcPreMatchSubstititution aSubstPreMatch;
pList->SetPreMatchHook( &aSubstPreMatch );
}
// register glyph fallback substitutions (unless disabled by bit1)
if( (nDisableBits & 2) == 0 )
{
static FcGlyphFallbackSubstititution aSubstFallback;
pList->SetFallbackHook( &aSubstFallback );
}
}
// -----------------------------------------------------------------------
static FontSelectPattern GetFcSubstitute(const FontSelectPattern &rFontSelData, rtl::OUString& rMissingCodes )
{
FontSelectPattern aSubstituted(rFontSelData);
psp::PrintFontManager& rMgr = psp::PrintFontManager::get();
rMgr.Substitute(aSubstituted, rMissingCodes);
return aSubstituted;
}
namespace
{
bool uselessmatch(const FontSelectPattern &rOrig, const FontSelectPattern &rNew)
{
return
(
rOrig.maTargetName == rNew.maSearchName &&
rOrig.meWeight == rNew.meWeight &&
rOrig.meItalic == rNew.meItalic &&
rOrig.mePitch == rNew.mePitch &&
rOrig.meWidthType == rNew.meWidthType
);
}
class equal
{
private:
const FontSelectPatternAttributes& mrAttributes;
public:
equal(const FontSelectPatternAttributes& rAttributes)
: mrAttributes(rAttributes)
{
}
bool operator()(const FcPreMatchSubstititution::value_type& rOther) const
{ return rOther.first == mrAttributes; }
};
}
//--------------------------------------------------------------------------
bool FcPreMatchSubstititution::FindFontSubstitute( FontSelectPattern &rFontSelData ) const
{
// We dont' actually want to talk to Fontconfig at all for symbol fonts
if( rFontSelData.IsSymbolFont() )
return false;
// StarSymbol is a unicode font, but it still deserves the symbol flag
if( 0 == rFontSelData.maSearchName.CompareIgnoreCaseToAscii( "starsymbol", 10)
|| 0 == rFontSelData.maSearchName.CompareIgnoreCaseToAscii( "opensymbol", 10) )
return false;
//see fdo#41556 and fdo#47636
//fontconfig can return e.g. an italic font for a non-italic input and/or
//different fonts depending on fontsize, bold, etc settings so don't cache
//just on the name, cache map all the input and all the output not just map
//from original selection to output fontname
FontSelectPatternAttributes& rPatternAttributes = rFontSelData;
CachedFontMapType &rCachedFontMap = const_cast<CachedFontMapType &>(maCachedFontMap);
CachedFontMapType::iterator itr = std::find_if(rCachedFontMap.begin(), rCachedFontMap.end(), equal(rPatternAttributes));
if (itr != rCachedFontMap.end())
{
// Cached substitution
rFontSelData.copyAttributes(itr->second);
if (itr != rCachedFontMap.begin())
{
// MRU, move it to the front
rCachedFontMap.splice(rCachedFontMap.begin(), rCachedFontMap, itr);
}
return true;
}
rtl::OUString aDummy;
const FontSelectPattern aOut = GetFcSubstitute( rFontSelData, aDummy );
if( !aOut.maSearchName.Len() )
return false;
const bool bHaveSubstitute = !uselessmatch( rFontSelData, aOut );
#ifdef DEBUG
const rtl::OString aOrigName(rtl::OUStringToOString(rFontSelData.maTargetName,
RTL_TEXTENCODING_UTF8));
const rtl::OString aSubstName(rtl::OUStringToOString(aOut.maSearchName,
RTL_TEXTENCODING_UTF8));
printf( "FcPreMatchSubstititution \"%s\" bipw=%d%d%d%d -> ",
aOrigName.getStr(), rFontSelData.meWeight, rFontSelData.meItalic,
rFontSelData.mePitch, rFontSelData.meWidthType );
if( !bHaveSubstitute )
printf( "no substitute available\n" );
else
printf( "\"%s\" bipw=%d%d%d%d\n", aSubstName.getStr(),
aOut.meWeight, aOut.meItalic, aOut.mePitch, aOut.meWidthType );
#endif
if( bHaveSubstitute )
{
rCachedFontMap.push_front(value_type(rFontSelData, aOut));
//fairly arbitrary limit in this case, but I recall measuring max 8
//fonts as the typical max amount of fonts in medium sized documents
if (rCachedFontMap.size() > 8)
rCachedFontMap.pop_back();
rFontSelData = aOut;
}
return bHaveSubstitute;
}
// -----------------------------------------------------------------------
bool FcGlyphFallbackSubstititution::FindFontSubstitute( FontSelectPattern& rFontSelData,
rtl::OUString& rMissingCodes ) const
{
// We dont' actually want to talk to Fontconfig at all for symbol fonts
if( rFontSelData.IsSymbolFont() )
return false;
// StarSymbol is a unicode font, but it still deserves the symbol flag
if( 0 == rFontSelData.maSearchName.CompareIgnoreCaseToAscii( "starsymbol", 10)
|| 0 == rFontSelData.maSearchName.CompareIgnoreCaseToAscii( "opensymbol", 10) )
return false;
const FontSelectPattern aOut = GetFcSubstitute( rFontSelData, rMissingCodes );
// TODO: cache the unicode + srcfont specific result
// FC doing it would be preferable because it knows the invariables
// e.g. FC knows the FC rule that all Arial gets replaced by LiberationSans
// whereas we would have to check for every size or attribute
if( !aOut.maSearchName.Len() )
return false;
const bool bHaveSubstitute = !uselessmatch( rFontSelData, aOut );
#ifdef DEBUG
const rtl::OString aOrigName(rtl::OUStringToOString(rFontSelData.maTargetName,
RTL_TEXTENCODING_UTF8));
const rtl::OString aSubstName(rtl::OUStringToOString(aOut.maSearchName,
RTL_TEXTENCODING_UTF8));
printf( "FcGFSubstititution \"%s\" bipw=%d%d%d%d ->",
aOrigName.getStr(), rFontSelData.meWeight, rFontSelData.meItalic,
rFontSelData.mePitch, rFontSelData.meWidthType );
if( !bHaveSubstitute )
printf( "no substitute available\n" );
else
printf( "\"%s\" bipw=%d%d%d%d\n", aSubstName.getStr(),
aOut.meWeight, aOut.meItalic, aOut.mePitch, aOut.meWidthType );
#endif
if( bHaveSubstitute )
rFontSelData = aOut;
return bHaveSubstitute;
}
// ===========================================================================
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|