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/* -*- 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 "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.GetWeight() == rNew.GetWeight() &&
rOrig.GetSlant() == rNew.GetSlant() &&
rOrig.GetPitch() == rNew.GetPitch() &&
rOrig.GetWidthType() == rNew.GetWidthType()
);
}
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.compareTo( "starsymbol", 10)
|| 0 == rFontSelData.maSearchName.compareTo( "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.getLength() )
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.GetWeight(), rFontSelData.GetSlant(),
rFontSelData.GetPitch(), rFontSelData.GetWidthType() );
if( !bHaveSubstitute )
printf( "no substitute available\n" );
else
printf( "\"%s\" bipw=%d%d%d%d\n", aSubstName.getStr(),
aOut.GetWeight(), aOut.GetSlant(), aOut.GetPitch(), aOut.GetWidthType() );
#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.compareTo( "starsymbol", 10)
|| 0 == rFontSelData.maSearchName.compareTo( "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.getLength() )
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.GetWeight(), rFontSelData.GetSlant(),
rFontSelData.GetPitch(), rFontSelData.GetWidthType() );
if( !bHaveSubstitute )
printf( "no substitute available\n" );
else
printf( "\"%s\" bipw=%d%d%d%d\n", aSubstName.getStr(),
aOut.GetWeight(), aOut.GetSlant(), aOut.GetPitch(), aOut.GetWidthType() );
#endif
if( bHaveSubstitute )
rFontSelData = aOut;
return bHaveSubstitute;
}
// ===========================================================================
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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