252 lines
8.7 KiB
C++
252 lines
8.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include "generic/geninst.h"
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#include "generic/genpspgraphics.h"
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#include "generic/glyphcache.hxx"
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#include "vcl/sysdata.hxx"
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#include "outfont.hxx"
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#include "generic/printergfx.hxx"
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#include "salbmp.hxx"
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#include "impfont.hxx"
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#include "outdev.h"
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#include "PhysicalFontCollection.hxx"
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#include "fontsubset.hxx"
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#include "salprn.hxx"
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#include <unotools/fontdefs.hxx>
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#include <list>
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// platform specific font substitution hooks
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class FcPreMatchSubstititution
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: public ImplPreMatchFontSubstitution
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{
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public:
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bool FindFontSubstitute( FontSelectPattern& ) const SAL_OVERRIDE;
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typedef ::std::pair<FontSelectPatternAttributes, FontSelectPatternAttributes> value_type;
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private:
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typedef ::std::list<value_type> CachedFontMapType;
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mutable CachedFontMapType maCachedFontMap;
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};
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class FcGlyphFallbackSubstititution
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: public ImplGlyphFallbackFontSubstitution
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{
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// TODO: add a cache
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public:
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bool FindFontSubstitute( FontSelectPattern&, OUString& rMissingCodes ) const SAL_OVERRIDE;
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};
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int SalGenericInstance::FetchFontSubstitutionFlags()
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{
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// init font substitution defaults
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int nDisableBits = 0;
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#ifdef SOLARIS
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nDisableBits = 1; // disable "font fallback" here on default
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#endif
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// apply the environment variable if any
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const char* pEnvStr = ::getenv( "SAL_DISABLE_FC_SUBST" );
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if( pEnvStr )
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{
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if( (*pEnvStr >= '0') && (*pEnvStr <= '9') )
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nDisableBits = (*pEnvStr - '0');
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else
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nDisableBits = ~0U; // no specific bits set: disable all
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}
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return nDisableBits;
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}
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void SalGenericInstance::RegisterFontSubstitutors( PhysicalFontCollection* pFontCollection )
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{
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// init font substitution defaults
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int nDisableBits = 0;
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#ifdef SOLARIS
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nDisableBits = 1; // disable "font fallback" here on default
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#endif
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// apply the environment variable if any
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const char* pEnvStr = ::getenv( "SAL_DISABLE_FC_SUBST" );
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if( pEnvStr )
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{
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if( (*pEnvStr >= '0') && (*pEnvStr <= '9') )
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nDisableBits = (*pEnvStr - '0');
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else
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nDisableBits = ~0U; // no specific bits set: disable all
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}
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// register font fallback substitutions (unless disabled by bit0)
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if( (nDisableBits & 1) == 0 )
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{
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static FcPreMatchSubstititution aSubstPreMatch;
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pFontCollection->SetPreMatchHook( &aSubstPreMatch );
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}
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// register glyph fallback substitutions (unless disabled by bit1)
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if( (nDisableBits & 2) == 0 )
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{
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static FcGlyphFallbackSubstititution aSubstFallback;
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pFontCollection->SetFallbackHook( &aSubstFallback );
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}
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}
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static FontSelectPattern GetFcSubstitute(const FontSelectPattern &rFontSelData, OUString& rMissingCodes )
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{
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FontSelectPattern aSubstituted(rFontSelData);
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psp::PrintFontManager& rMgr = psp::PrintFontManager::get();
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rMgr.Substitute(aSubstituted, rMissingCodes);
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return aSubstituted;
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}
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namespace
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{
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bool uselessmatch(const FontSelectPattern &rOrig, const FontSelectPattern &rNew)
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{
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return
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(
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rOrig.maTargetName == rNew.maSearchName &&
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rOrig.GetWeight() == rNew.GetWeight() &&
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rOrig.GetSlant() == rNew.GetSlant() &&
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rOrig.GetPitch() == rNew.GetPitch() &&
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rOrig.GetWidthType() == rNew.GetWidthType()
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);
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}
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class equal
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{
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private:
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const FontSelectPatternAttributes& mrAttributes;
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public:
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equal(const FontSelectPatternAttributes& rAttributes)
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: mrAttributes(rAttributes)
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{
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}
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bool operator()(const FcPreMatchSubstititution::value_type& rOther) const
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{ return rOther.first == mrAttributes; }
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};
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}
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bool FcPreMatchSubstititution::FindFontSubstitute( FontSelectPattern &rFontSelData ) const
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{
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// We don't actually want to talk to Fontconfig at all for symbol fonts
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if( rFontSelData.IsSymbolFont() )
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return false;
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// StarSymbol is a unicode font, but it still deserves the symbol flag
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if ( IsStarSymbol(rFontSelData.maSearchName) )
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return false;
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//see fdo#41556 and fdo#47636
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//fontconfig can return e.g. an italic font for a non-italic input and/or
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//different fonts depending on fontsize, bold, etc settings so don't cache
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//just on the name, cache map all the input and all the output not just map
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//from original selection to output fontname
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FontSelectPatternAttributes& rPatternAttributes = rFontSelData;
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CachedFontMapType &rCachedFontMap = const_cast<CachedFontMapType &>(maCachedFontMap);
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CachedFontMapType::iterator itr = std::find_if(rCachedFontMap.begin(), rCachedFontMap.end(), equal(rPatternAttributes));
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if (itr != rCachedFontMap.end())
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{
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// Cached substitution
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rFontSelData.copyAttributes(itr->second);
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if (itr != rCachedFontMap.begin())
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{
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// MRU, move it to the front
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rCachedFontMap.splice(rCachedFontMap.begin(), rCachedFontMap, itr);
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}
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return true;
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}
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OUString aDummy;
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const FontSelectPattern aOut = GetFcSubstitute( rFontSelData, aDummy );
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if( aOut.maSearchName.isEmpty() )
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return false;
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const bool bHaveSubstitute = !uselessmatch( rFontSelData, aOut );
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#ifdef DEBUG
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const OString aOrigName(OUStringToOString(rFontSelData.maTargetName,
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RTL_TEXTENCODING_UTF8));
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const OString aSubstName(OUStringToOString(aOut.maSearchName,
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RTL_TEXTENCODING_UTF8));
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printf( "FcPreMatchSubstititution \"%s\" bipw=%d%d%d%d -> ",
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aOrigName.getStr(), rFontSelData.GetWeight(), rFontSelData.GetSlant(),
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rFontSelData.GetPitch(), rFontSelData.GetWidthType() );
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if( !bHaveSubstitute )
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printf( "no substitute available\n" );
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else
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printf( "\"%s\" bipw=%d%d%d%d\n", aSubstName.getStr(),
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aOut.GetWeight(), aOut.GetSlant(), aOut.GetPitch(), aOut.GetWidthType() );
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#endif
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if( bHaveSubstitute )
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{
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rCachedFontMap.push_front(value_type(rFontSelData, aOut));
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//fairly arbitrary limit in this case, but I recall measuring max 8
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//fonts as the typical max amount of fonts in medium sized documents
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if (rCachedFontMap.size() > 8)
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rCachedFontMap.pop_back();
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rFontSelData = aOut;
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}
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return bHaveSubstitute;
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}
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bool FcGlyphFallbackSubstititution::FindFontSubstitute( FontSelectPattern& rFontSelData,
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OUString& rMissingCodes ) const
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{
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// We don't actually want to talk to Fontconfig at all for symbol fonts
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if( rFontSelData.IsSymbolFont() )
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return false;
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// StarSymbol is a unicode font, but it still deserves the symbol flag
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if ( IsStarSymbol(rFontSelData.maSearchName) )
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return false;
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const FontSelectPattern aOut = GetFcSubstitute( rFontSelData, rMissingCodes );
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// TODO: cache the unicode + srcfont specific result
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// FC doing it would be preferable because it knows the invariables
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// e.g. FC knows the FC rule that all Arial gets replaced by LiberationSans
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// whereas we would have to check for every size or attribute
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if( aOut.maSearchName.isEmpty() )
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return false;
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const bool bHaveSubstitute = !uselessmatch( rFontSelData, aOut );
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#ifdef DEBUG
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const OString aOrigName(OUStringToOString(rFontSelData.maTargetName,
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RTL_TEXTENCODING_UTF8));
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const OString aSubstName(OUStringToOString(aOut.maSearchName,
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RTL_TEXTENCODING_UTF8));
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printf( "FcGFSubstititution \"%s\" bipw=%d%d%d%d ->",
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aOrigName.getStr(), rFontSelData.GetWeight(), rFontSelData.GetSlant(),
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rFontSelData.GetPitch(), rFontSelData.GetWidthType() );
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if( !bHaveSubstitute )
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printf( "no substitute available\n" );
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else
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printf( "\"%s\" bipw=%d%d%d%d\n", aSubstName.getStr(),
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aOut.GetWeight(), aOut.GetSlant(), aOut.GetPitch(), aOut.GetWidthType() );
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#endif
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if( bHaveSubstitute )
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rFontSelData = aOut;
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return bHaveSubstitute;
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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