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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 <vcl/fontcharmap.hxx>
#include <unx/freetype_glyphcache.hxx>
#include <vcl/svapp.hxx>
#include <fontinstance.hxx>
#include <impfont.hxx>
#include <fontattributes.hxx>
#include <config_features.h>
#include <unotools/fontdefs.hxx>
#include <tools/poly.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include <basegfx/polygon/b2dpolypolygon.hxx>
#include <osl/file.hxx>
#include <osl/thread.hxx>
#include <langboost.hxx>
#include <PhysicalFontCollection.hxx>
#include <sft.hxx>
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
#include FT_OUTLINE_H
#include FT_SIZES_H
#include FT_SYNTHESIS_H
#include FT_TRUETYPE_TABLES_H
#include FT_TRUETYPE_TAGS_H
#include FT_TRUETYPE_IDS_H
#include <rtl/instance.hxx>
#include <vector>
// TODO: move file mapping stuff to OSL
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <unx/fontmanager.hxx>
#include <impfontcharmap.hxx>
static FT_Library aLibFT = nullptr;
// enable linking with old FT versions
static int nFTVERSION = 0;
typedef std::unordered_map<const char*, std::shared_ptr<FreetypeFontFile>, rtl::CStringHash, rtl::CStringEqual> FontFileList;
namespace { struct vclFontFileList : public rtl::Static< FontFileList, vclFontFileList > {}; }
// TODO: remove when the priorities are selected by UI
// if (AH==0) => disable autohinting
// if (AA==0) => disable antialiasing
// if (EB==0) => disable embedded bitmaps
// if (AA prio <= AH prio) => antialias + autohint
// if (AH<AA) => do not autohint when antialiasing
// if (EB<AH) => do not autohint for monochrome
static int nDefaultPrioEmbedded = 2;
static int nDefaultPrioAutoHint = 1;
static int nDefaultPrioAntiAlias = 1;
// FreetypeManager
FreetypeFontFile::FreetypeFontFile( const OString& rNativeFileName )
: maNativeFileName( rNativeFileName ),
mpFileMap( nullptr ),
mnFileSize( 0 ),
mnRefCount( 0 ),
mnLangBoost( 0 )
{
// boost font preference if UI language is mentioned in filename
int nPos = maNativeFileName.lastIndexOf( '_' );
if( nPos == -1 || maNativeFileName[nPos+1] == '.' )
mnLangBoost += 0x1000; // no langinfo => good
else
{
static const char* pLangBoost = nullptr;
static bool bOnce = true;
if( bOnce )
{
bOnce = false;
pLangBoost = vcl::getLangBoost();
}
if( pLangBoost && !strncasecmp( pLangBoost, &maNativeFileName.getStr()[nPos+1], 3 ) )
mnLangBoost += 0x2000; // matching langinfo => better
}
}
FreetypeFontFile* FreetypeFontFile::FindFontFile( const OString& rNativeFileName )
{
// font file already known? (e.g. for ttc, synthetic, aliased fonts)
const char* pFileName = rNativeFileName.getStr();
FontFileList &rFontFileList = vclFontFileList::get();
FontFileList::const_iterator it = rFontFileList.find( pFileName );
if( it != rFontFileList.end() )
return it->second.get();
// no => create new one
FreetypeFontFile* pFontFile = new FreetypeFontFile( rNativeFileName );
pFileName = pFontFile->maNativeFileName.getStr();
rFontFileList[pFileName].reset(pFontFile);
return pFontFile;
}
bool FreetypeFontFile::Map()
{
if( mnRefCount++ <= 0 )
{
const char* pFileName = maNativeFileName.getStr();
int nFile = open( pFileName, O_RDONLY );
if( nFile < 0 )
return false;
struct stat aStat;
int nRet = fstat( nFile, &aStat );
if (nRet < 0)
{
close (nFile);
return false;
}
mnFileSize = aStat.st_size;
mpFileMap = static_cast<unsigned char*>(
mmap( nullptr, mnFileSize, PROT_READ, MAP_SHARED, nFile, 0 ));
if( mpFileMap == MAP_FAILED )
mpFileMap = nullptr;
close( nFile );
}
return (mpFileMap != nullptr);
}
void FreetypeFontFile::Unmap()
{
if( (--mnRefCount > 0) || (mpFileMap == nullptr) )
return;
munmap( mpFileMap, mnFileSize );
mpFileMap = nullptr;
}
FreetypeFontInfo::FreetypeFontInfo( const FontAttributes& rDevFontAttributes,
const OString& rNativeFileName, int nFaceNum, sal_IntPtr nFontId)
:
maFaceFT( nullptr ),
mpFontFile( FreetypeFontFile::FindFontFile( rNativeFileName ) ),
mnFaceNum( nFaceNum ),
mnRefCount( 0 ),
mnFontId( nFontId ),
maDevFontAttributes( rDevFontAttributes ),
mxFontCharMap( nullptr )
{
// prefer font with low ID
maDevFontAttributes.IncreaseQualityBy( 10000 - nFontId );
// prefer font with matching file names
maDevFontAttributes.IncreaseQualityBy( mpFontFile->GetLangBoost() );
}
FreetypeFontInfo::~FreetypeFontInfo()
{
}
FT_FaceRec_* FreetypeFontInfo::GetFaceFT()
{
if (!maFaceFT && mpFontFile->Map())
{
FT_Error rc = FT_New_Memory_Face( aLibFT,
mpFontFile->GetBuffer(),
mpFontFile->GetFileSize(), mnFaceNum, &maFaceFT );
if( (rc != FT_Err_Ok) || (maFaceFT->num_glyphs <= 0) )
maFaceFT = nullptr;
}
++mnRefCount;
return maFaceFT;
}
void FreetypeFontInfo::ReleaseFaceFT()
{
if (--mnRefCount <= 0)
{
FT_Done_Face( maFaceFT );
maFaceFT = nullptr;
mpFontFile->Unmap();
}
}
static unsigned GetUInt( const unsigned char* p ) { return((p[0]<<24)+(p[1]<<16)+(p[2]<<8)+p[3]);}
static unsigned GetUShort( const unsigned char* p ){ return((p[0]<<8)+p[1]);}
static const sal_uInt32 T_true = 0x74727565; /* 'true' */
static const sal_uInt32 T_ttcf = 0x74746366; /* 'ttcf' */
static const sal_uInt32 T_otto = 0x4f54544f; /* 'OTTO' */
const unsigned char* FreetypeFontInfo::GetTable( const char* pTag, sal_uLong* pLength ) const
{
const unsigned char* pBuffer = mpFontFile->GetBuffer();
int nFileSize = mpFontFile->GetFileSize();
if( !pBuffer || nFileSize<1024 )
return nullptr;
// we currently handle TTF, TTC and OTF headers
unsigned nFormat = GetUInt( pBuffer );
const unsigned char* p = pBuffer + 12;
if( nFormat == T_ttcf ) // TTC_MAGIC
p += GetUInt( p + 4 * mnFaceNum );
else if( nFormat != 0x00010000 && nFormat != T_true && nFormat != T_otto) // TTF_MAGIC and Apple TTF Magic and PS-OpenType font
return nullptr;
// walk table directory until match
int nTables = GetUShort( p - 8 );
if( nTables >= 64 ) // something fishy?
return nullptr;
for( int i = 0; i < nTables; ++i, p+=16 )
{
if( p[0]==pTag[0] && p[1]==pTag[1] && p[2]==pTag[2] && p[3]==pTag[3] )
{
sal_uLong nLength = GetUInt( p + 12 );
if( pLength != nullptr )
*pLength = nLength;
const unsigned char* pTable = pBuffer + GetUInt( p + 8 );
if( (pTable + nLength) <= (mpFontFile->GetBuffer() + nFileSize) )
return pTable;
}
}
return nullptr;
}
void FreetypeFontInfo::AnnounceFont( PhysicalFontCollection* pFontCollection )
{
FreetypeFontFace* pFD = new FreetypeFontFace( this, maDevFontAttributes );
pFontCollection->Add( pFD );
}
FreetypeManager::FreetypeManager()
: mnMaxFontId( 0 )
{
/*FT_Error rcFT =*/ FT_Init_FreeType( &aLibFT );
FT_Int nMajor = 0, nMinor = 0, nPatch = 0;
FT_Library_Version(aLibFT, &nMajor, &nMinor, &nPatch);
nFTVERSION = nMajor * 1000 + nMinor * 100 + nPatch;
// TODO: remove when the priorities are selected by UI
char* pEnv;
pEnv = ::getenv( "SAL_EMBEDDED_BITMAP_PRIORITY" );
if( pEnv )
nDefaultPrioEmbedded = pEnv[0] - '0';
pEnv = ::getenv( "SAL_ANTIALIASED_TEXT_PRIORITY" );
if( pEnv )
nDefaultPrioAntiAlias = pEnv[0] - '0';
pEnv = ::getenv( "SAL_AUTOHINTING_PRIORITY" );
if( pEnv )
nDefaultPrioAutoHint = pEnv[0] - '0';
vclFontFileList::get();
}
FT_Face FreetypeFont::GetFtFace() const
{
FT_Activate_Size( maSizeFT );
return maFaceFT;
}
FreetypeManager::~FreetypeManager()
{
ClearFontList();
}
void FreetypeManager::AddFontFile( const OString& rNormalizedName,
int nFaceNum, sal_IntPtr nFontId, const FontAttributes& rDevFontAttr)
{
if( rNormalizedName.isEmpty() )
return;
if( maFontList.find( nFontId ) != maFontList.end() )
return;
FreetypeFontInfo* pFontInfo = new FreetypeFontInfo( rDevFontAttr,
rNormalizedName, nFaceNum, nFontId);
maFontList[ nFontId ] = pFontInfo;
if( mnMaxFontId < nFontId )
mnMaxFontId = nFontId;
}
void FreetypeManager::AnnounceFonts( PhysicalFontCollection* pToAdd ) const
{
for( FontList::const_iterator it = maFontList.begin(); it != maFontList.end(); ++it )
{
FreetypeFontInfo* pFreetypeFontInfo = it->second;
pFreetypeFontInfo->AnnounceFont( pToAdd );
}
}
void FreetypeManager::ClearFontList( )
{
for( FontList::iterator it = maFontList.begin(); it != maFontList.end(); ++it )
{
FreetypeFontInfo* pFreetypeFontInfo = it->second;
delete pFreetypeFontInfo;
}
maFontList.clear();
}
FreetypeFont* FreetypeManager::CreateFont( const FontSelectPattern& rFSD )
{
FreetypeFontInfo* pFontInfo = nullptr;
// find a FontInfo matching to the font id
sal_IntPtr nFontId = reinterpret_cast<sal_IntPtr>( rFSD.mpFontData );
FontList::iterator it = maFontList.find( nFontId );
if( it != maFontList.end() )
pFontInfo = it->second;
if( !pFontInfo )
return nullptr;
FreetypeFont* pNew = new FreetypeFont( rFSD, pFontInfo );
return pNew;
}
FreetypeFontFace::FreetypeFontFace( FreetypeFontInfo* pFI, const FontAttributes& rDFA )
: PhysicalFontFace( rDFA ),
mpFreetypeFontInfo( pFI )
{
}
LogicalFontInstance* FreetypeFontFace::CreateFontInstance(const FontSelectPattern& rFSD) const
{
return new FreetypeFontInstance(rFSD);
}
// FreetypeFont
FreetypeFont::FreetypeFont( const FontSelectPattern& rFSD, FreetypeFontInfo* pFI )
: maGlyphList( 0),
maFontSelData(rFSD),
mnRefCount(1),
mnBytesUsed( sizeof(FreetypeFont) ),
mpPrevGCFont( nullptr ),
mpNextGCFont( nullptr ),
mnCos( 0x10000),
mnSin( 0 ),
mnPrioEmbedded(nDefaultPrioEmbedded),
mnPrioAntiAlias(nDefaultPrioAntiAlias),
mpFontInfo( pFI ),
mnLoadFlags( 0 ),
maFaceFT( nullptr ),
maSizeFT( nullptr ),
mbFaceOk( false ),
mbArtItalic( false ),
mbArtBold( false ),
mpHbFont( nullptr )
{
// TODO: move update of mpFontInstance into FontEntry class when
// it becomes responsible for the FreetypeFont instantiation
static_cast<FreetypeFontInstance*>(rFSD.mpFontInstance)->SetFreetypeFont( this );
maFaceFT = pFI->GetFaceFT();
if( rFSD.mnOrientation != 0 )
{
const double dRad = rFSD.mnOrientation * ( F_2PI / 3600.0 );
mnCos = static_cast<long>( 0x10000 * cos( dRad ) + 0.5 );
mnSin = static_cast<long>( 0x10000 * sin( dRad ) + 0.5 );
}
// set the pixel size of the font instance
mnWidth = rFSD.mnWidth;
if( !mnWidth )
mnWidth = rFSD.mnHeight;
mfStretch = static_cast<double>(mnWidth) / rFSD.mnHeight;
// sanity check (e.g. #i66394#, #i66244#, #66537#)
if( (mnWidth < 0) || (mfStretch > +64.0) || (mfStretch < -64.0) )
return;
if( !maFaceFT )
return;
FT_New_Size( maFaceFT, &maSizeFT );
FT_Activate_Size( maSizeFT );
FT_Error rc = FT_Set_Pixel_Sizes( maFaceFT, mnWidth, rFSD.mnHeight );
if( rc != FT_Err_Ok )
return;
FT_Select_Charmap(maFaceFT, FT_ENCODING_UNICODE);
if( mpFontInfo->IsSymbolFont() )
{
FT_Encoding eEncoding = FT_ENCODING_MS_SYMBOL;
if (!FT_IS_SFNT(maFaceFT))
eEncoding = FT_ENCODING_ADOBE_CUSTOM; // freetype wants this for PS symbol fonts
FT_Select_Charmap(maFaceFT, eEncoding);
}
mbFaceOk = true;
// TODO: query GASP table for load flags
mnLoadFlags = FT_LOAD_DEFAULT | FT_LOAD_IGNORE_TRANSFORM;
mbArtItalic = (rFSD.GetItalic() != ITALIC_NONE && pFI->GetFontAttributes().GetItalic() == ITALIC_NONE);
mbArtBold = (rFSD.GetWeight() > WEIGHT_MEDIUM && pFI->GetFontAttributes().GetWeight() <= WEIGHT_MEDIUM);
if( ((mnCos != 0) && (mnSin != 0)) || (mnPrioEmbedded <= 0) )
mnLoadFlags |= FT_LOAD_NO_BITMAP;
}
namespace
{
FontConfigFontOptions* GetFCFontOptions( const FontAttributes& rFontAttributes, int nSize)
{
psp::FastPrintFontInfo aInfo;
aInfo.m_aFamilyName = rFontAttributes.GetFamilyName();
aInfo.m_eItalic = rFontAttributes.GetItalic();
aInfo.m_eWeight = rFontAttributes.GetWeight();
aInfo.m_eWidth = rFontAttributes.GetWidthType();
return psp::PrintFontManager::getFontOptions(aInfo, nSize);
}
}
const FontConfigFontOptions* FreetypeFont::GetFontOptions() const
{
if (!mxFontOptions)
{
mxFontOptions.reset(GetFCFontOptions(mpFontInfo->GetFontAttributes(), maFontSelData.mnHeight));
mxFontOptions->SyncPattern(GetFontFileName(), GetFontFaceIndex(), NeedsArtificialBold());
}
return mxFontOptions.get();
}
void FreetypeFont::ClearFontOptions()
{
mxFontOptions.reset();
}
const OString& FreetypeFont::GetFontFileName() const
{
return mpFontInfo->GetFontFileName();
}
int FreetypeFont::GetFontFaceIndex() const
{
return mpFontInfo->GetFontFaceIndex();
}
FreetypeFont::~FreetypeFont()
{
if( maSizeFT )
FT_Done_Size( maSizeFT );
mpFontInfo->ReleaseFaceFT();
if( mpHbFont )
hb_font_destroy( mpHbFont );
ReleaseFromGarbageCollect();
}
void FreetypeFont::GetFontMetric(ImplFontMetricDataRef const & rxTo) const
{
rxTo->FontAttributes::operator =(mpFontInfo->GetFontAttributes());
rxTo->SetOrientation( GetFontSelData().mnOrientation );
//Always consider [star]symbol as symbol fonts
if ( IsStarSymbol( rxTo->GetFamilyName() ) )
rxTo->SetSymbolFlag( true );
FT_Activate_Size( maSizeFT );
sal_uLong nHhea = 0;
const uint8_t* pHheaBuf = mpFontInfo->GetTable("hhea", &nHhea);
const std::vector<uint8_t> rHhea(pHheaBuf, pHheaBuf + nHhea);
sal_uLong nOS2 = 0;
const uint8_t* pOS2Buf = mpFontInfo->GetTable("OS/2", &nOS2);
const std::vector<uint8_t> rOS2(pOS2Buf, pOS2Buf + nOS2);
rxTo->ImplCalcLineSpacing(rHhea, rOS2, maFaceFT->units_per_EM);
rxTo->SetSlant( 0 );
rxTo->SetWidth( mnWidth );
const TT_OS2* pOS2 = static_cast<const TT_OS2*>(FT_Get_Sfnt_Table( maFaceFT, ft_sfnt_os2 ));
if( pOS2 && (pOS2->version != 0xFFFF) )
{
// map the panose info from the OS2 table to their VCL counterparts
switch( pOS2->panose[0] )
{
case 1: rxTo->SetFamilyType( FAMILY_ROMAN ); break;
case 2: rxTo->SetFamilyType( FAMILY_SWISS ); break;
case 3: rxTo->SetFamilyType( FAMILY_MODERN ); break;
case 4: rxTo->SetFamilyType( FAMILY_SCRIPT ); break;
case 5: rxTo->SetFamilyType( FAMILY_DECORATIVE ); break;
// TODO: is it reasonable to override the attribute with DONTKNOW?
case 0: // fall through
default: rxTo->SetFamilyType( FAMILY_DONTKNOW ); break;
}
switch( pOS2->panose[3] )
{
case 2: // fall through
case 3: // fall through
case 4: // fall through
case 5: // fall through
case 6: // fall through
case 7: // fall through
case 8: rxTo->SetPitch( PITCH_VARIABLE ); break;
case 9: rxTo->SetPitch( PITCH_FIXED ); break;
// TODO: is it reasonable to override the attribute with DONTKNOW?
case 0: // fall through
case 1: // fall through
default: rxTo->SetPitch( PITCH_DONTKNOW ); break;
}
}
// initialize kashida width
const int nKashidaGlyphId = FT_Get_Char_Index(maFaceFT, 0x0640);
if( nKashidaGlyphId )
{
if (FT_Load_Glyph(maFaceFT, nKashidaGlyphId, mnLoadFlags) == FT_Err_Ok)
{
int nWidth = (maFaceFT->glyph->metrics.horiAdvance + 32) >> 6;
rxTo->SetMinKashida(nWidth);
}
}
}
void FreetypeFont::ApplyGlyphTransform(bool bVertical, FT_Glyph pGlyphFT ) const
{
// shortcut most common case
if (!GetFontSelData().mnOrientation && !bVertical)
return;
const FT_Size_Metrics& rMetrics = maFaceFT->size->metrics;
FT_Vector aVector;
FT_Matrix aMatrix;
bool bStretched = false;
if (!bVertical)
{
// straight
aVector.x = 0;
aVector.y = 0;
aMatrix.xx = +mnCos;
aMatrix.yy = +mnCos;
aMatrix.xy = -mnSin;
aMatrix.yx = +mnSin;
}
else
{
// left
bStretched = (mfStretch != 1.0);
aVector.x = static_cast<FT_Pos>(+rMetrics.descender * mfStretch);
aVector.y = -rMetrics.ascender;
aMatrix.xx = static_cast<FT_Pos>(-mnSin / mfStretch);
aMatrix.yy = static_cast<FT_Pos>(-mnSin * mfStretch);
aMatrix.xy = static_cast<FT_Pos>(-mnCos * mfStretch);
aMatrix.yx = static_cast<FT_Pos>(+mnCos / mfStretch);
}
if( pGlyphFT->format != FT_GLYPH_FORMAT_BITMAP )
{
FT_Glyph_Transform( pGlyphFT, nullptr, &aVector );
// orthogonal transforms are better handled by bitmap operations
if( bStretched )
{
// apply non-orthogonal or stretch transformations
FT_Glyph_Transform( pGlyphFT, &aMatrix, nullptr );
}
}
else
{
// FT<=2005 ignores transforms for bitmaps, so do it manually
FT_BitmapGlyph pBmpGlyphFT = reinterpret_cast<FT_BitmapGlyph>(pGlyphFT);
pBmpGlyphFT->left += (aVector.x + 32) >> 6;
pBmpGlyphFT->top += (aVector.y + 32) >> 6;
}
}
void FreetypeFont::InitGlyphData(const GlyphItem& rGlyph, GlyphData& rGD ) const
{
FT_Activate_Size( maSizeFT );
FT_Error rc = FT_Load_Glyph(maFaceFT, rGlyph.maGlyphId, mnLoadFlags);
if (rc != FT_Err_Ok)
return;
if (mbArtBold)
FT_GlyphSlot_Embolden(maFaceFT->glyph);
FT_Glyph pGlyphFT;
rc = FT_Get_Glyph(maFaceFT->glyph, &pGlyphFT);
if (rc != FT_Err_Ok)
return;
ApplyGlyphTransform(rGlyph.IsVertical(), pGlyphFT);
FT_BBox aBbox;
FT_Glyph_Get_CBox( pGlyphFT, FT_GLYPH_BBOX_PIXELS, &aBbox );
rGD.SetBoundRect(tools::Rectangle(aBbox.xMin, -aBbox.yMax, aBbox.xMax, -aBbox.yMin));
FT_Done_Glyph( pGlyphFT );
}
bool FreetypeFont::GetAntialiasAdvice() const
{
// TODO: also use GASP info
return !GetFontSelData().mbNonAntialiased && (mnPrioAntiAlias > 0);
}
// determine unicode ranges in font
const FontCharMapRef FreetypeFont::GetFontCharMap() const
{
const FontCharMapRef xFCMap = mpFontInfo->GetFontCharMap();
return xFCMap;
}
const FontCharMapRef& FreetypeFontInfo::GetFontCharMap()
{
// check if the charmap is already cached
if( mxFontCharMap.is() )
return mxFontCharMap;
// get the charmap and cache it
CmapResult aCmapResult;
bool bOK = GetFontCodeRanges( aCmapResult );
if( bOK )
{
FontCharMapRef xFontCharMap( new FontCharMap ( aCmapResult ) );
mxFontCharMap = xFontCharMap;
}
else
{
FontCharMapRef xFontCharMap( new FontCharMap() );
mxFontCharMap = xFontCharMap;
}
// mxFontCharMap on either branch now has a refcount of 1
return mxFontCharMap;
}
// TODO: merge into method GetFontCharMap()
bool FreetypeFontInfo::GetFontCodeRanges( CmapResult& rResult ) const
{
rResult.mbSymbolic = IsSymbolFont();
// TODO: is the full CmapResult needed on platforms calling this?
if( FT_IS_SFNT( maFaceFT ) )
{
sal_uLong nLength = 0;
const unsigned char* pCmap = GetTable( "cmap", &nLength );
if( pCmap && (nLength > 0) )
if( ParseCMAP( pCmap, nLength, rResult ) )
return true;
}
std::vector<sal_uInt32> aCodes;
// FT's coverage is available since FT>=2.1.0 (OOo-baseline>=2.1.4 => ok)
aCodes.reserve( 0x1000 );
FT_UInt nGlyphIndex;
for( sal_uInt32 cCode = FT_Get_First_Char( maFaceFT, &nGlyphIndex );; )
{
if( !nGlyphIndex )
break;
aCodes.push_back( cCode ); // first code inside range
sal_uInt32 cNext;
do cNext = FT_Get_Next_Char( maFaceFT, cCode, &nGlyphIndex ); while( cNext == ++cCode );
aCodes.push_back( cCode ); // first code outside range
cCode = cNext;
}
const int nCount = aCodes.size();
if( !nCount) {
if( !rResult.mbSymbolic )
return false;
// we usually get here for Type1 symbol fonts
aCodes.push_back( 0xF020 );
aCodes.push_back( 0xF100 );
}
sal_uInt32* pCodes = new sal_uInt32[ nCount ];
for( int i = 0; i < nCount; ++i )
pCodes[i] = aCodes[i];
rResult.mpRangeCodes = pCodes;
rResult.mnRangeCount = nCount / 2;
return true;
}
bool FreetypeFont::GetFontCapabilities(vcl::FontCapabilities &rFontCapabilities) const
{
bool bRet = false;
sal_uLong nLength = 0;
// load OS/2 table
const FT_Byte* pOS2 = mpFontInfo->GetTable("OS/2", &nLength);
if (pOS2)
{
bRet = vcl::getTTCoverage(
rFontCapabilities.oUnicodeRange,
rFontCapabilities.oCodePageRange,
pOS2, nLength);
}
return bRet;
}
// outline stuff
class PolyArgs
{
public:
PolyArgs( tools::PolyPolygon& rPolyPoly, sal_uInt16 nMaxPoints );
void AddPoint( long nX, long nY, PolyFlags);
void ClosePolygon();
long GetPosX() const { return maPosition.x;}
long GetPosY() const { return maPosition.y;}
private:
tools::PolyPolygon& mrPolyPoly;
std::unique_ptr<Point[]>
mpPointAry;
std::unique_ptr<PolyFlags[]>
mpFlagAry;
FT_Vector maPosition;
sal_uInt16 mnMaxPoints;
sal_uInt16 mnPoints;
sal_uInt16 mnPoly;
bool bHasOffline;
PolyArgs(const PolyArgs&) = delete;
PolyArgs& operator=(const PolyArgs&) = delete;
};
PolyArgs::PolyArgs( tools::PolyPolygon& rPolyPoly, sal_uInt16 nMaxPoints )
: mrPolyPoly(rPolyPoly),
mnMaxPoints(nMaxPoints),
mnPoints(0),
mnPoly(0),
bHasOffline(false)
{
mpPointAry.reset( new Point[ mnMaxPoints ] );
mpFlagAry.reset( new PolyFlags [ mnMaxPoints ] );
maPosition.x = maPosition.y = 0;
}
void PolyArgs::AddPoint( long nX, long nY, PolyFlags aFlag )
{
SAL_WARN_IF( (mnPoints >= mnMaxPoints), "vcl", "FTGlyphOutline: AddPoint overflow!" );
if( mnPoints >= mnMaxPoints )
return;
maPosition.x = nX;
maPosition.y = nY;
mpPointAry[ mnPoints ] = Point( nX, nY );
mpFlagAry[ mnPoints++ ]= aFlag;
bHasOffline |= (aFlag != PolyFlags::Normal);
}
void PolyArgs::ClosePolygon()
{
if( !mnPoly++ )
return;
// freetype seems to always close the polygon with an ON_CURVE point
// PolyPoly wants to close the polygon itself => remove last point
SAL_WARN_IF( (mnPoints < 2), "vcl", "FTGlyphOutline: PolyFinishNum failed!" );
--mnPoints;
SAL_WARN_IF( (mpPointAry[0]!=mpPointAry[mnPoints]), "vcl", "FTGlyphOutline: PolyFinishEq failed!" );
SAL_WARN_IF( (mpFlagAry[0]!=PolyFlags::Normal), "vcl", "FTGlyphOutline: PolyFinishFE failed!" );
SAL_WARN_IF( (mpFlagAry[mnPoints]!=PolyFlags::Normal), "vcl", "FTGlyphOutline: PolyFinishFS failed!" );
tools::Polygon aPoly( mnPoints, mpPointAry.get(), (bHasOffline ? mpFlagAry.get() : nullptr) );
// #i35928#
// This may be a invalid polygons, e.g. the last point is a control point.
// So close the polygon (and add the first point again) if the last point
// is a control point or different from first.
// #i48298#
// Now really duplicating the first point, to close or correct the
// polygon. Also no longer duplicating the flags, but enforcing
// PolyFlags::Normal for the newly added last point.
const sal_uInt16 nPolySize(aPoly.GetSize());
if(nPolySize)
{
if((aPoly.HasFlags() && PolyFlags::Control == aPoly.GetFlags(nPolySize - 1))
|| (aPoly.GetPoint(nPolySize - 1) != aPoly.GetPoint(0)))
{
aPoly.SetSize(nPolySize + 1);
aPoly.SetPoint(aPoly.GetPoint(0), nPolySize);
if(aPoly.HasFlags())
{
aPoly.SetFlags(nPolySize, PolyFlags::Normal);
}
}
}
mrPolyPoly.Insert( aPoly );
mnPoints = 0;
bHasOffline = false;
}
extern "C" {
// TODO: wait till all compilers accept that calling conventions
// for functions are the same independent of implementation constness,
// then uncomment the const-tokens in the function interfaces below
static int FT_move_to( const FT_Vector* p0, void* vpPolyArgs )
{
PolyArgs& rA = *static_cast<PolyArgs*>(vpPolyArgs);
// move_to implies a new polygon => finish old polygon first
rA.ClosePolygon();
rA.AddPoint( p0->x, p0->y, PolyFlags::Normal );
return 0;
}
static int FT_line_to( const FT_Vector* p1, void* vpPolyArgs )
{
PolyArgs& rA = *static_cast<PolyArgs*>(vpPolyArgs);
rA.AddPoint( p1->x, p1->y, PolyFlags::Normal );
return 0;
}
static int FT_conic_to( const FT_Vector* p1, const FT_Vector* p2, void* vpPolyArgs )
{
PolyArgs& rA = *static_cast<PolyArgs*>(vpPolyArgs);
// VCL's Polygon only knows cubic beziers
const long nX1 = (2 * rA.GetPosX() + 4 * p1->x + 3) / 6;
const long nY1 = (2 * rA.GetPosY() + 4 * p1->y + 3) / 6;
rA.AddPoint( nX1, nY1, PolyFlags::Control );
const long nX2 = (2 * p2->x + 4 * p1->x + 3) / 6;
const long nY2 = (2 * p2->y + 4 * p1->y + 3) / 6;
rA.AddPoint( nX2, nY2, PolyFlags::Control );
rA.AddPoint( p2->x, p2->y, PolyFlags::Normal );
return 0;
}
static int FT_cubic_to( const FT_Vector* p1, const FT_Vector* p2, const FT_Vector* p3, void* vpPolyArgs )
{
PolyArgs& rA = *static_cast<PolyArgs*>(vpPolyArgs);
rA.AddPoint( p1->x, p1->y, PolyFlags::Control );
rA.AddPoint( p2->x, p2->y, PolyFlags::Control );
rA.AddPoint( p3->x, p3->y, PolyFlags::Normal );
return 0;
}
} // extern "C"
bool FreetypeFont::GetGlyphOutline(const GlyphItem& rGlyph,
basegfx::B2DPolyPolygon& rB2DPolyPoly ) const
{
if( maSizeFT )
FT_Activate_Size( maSizeFT );
rB2DPolyPoly.clear();
FT_Int nLoadFlags = FT_LOAD_DEFAULT | FT_LOAD_IGNORE_TRANSFORM;
#ifdef FT_LOAD_TARGET_LIGHT
// enable "light hinting" if available
nLoadFlags |= FT_LOAD_TARGET_LIGHT;
#endif
FT_Error rc = FT_Load_Glyph(maFaceFT, rGlyph.maGlyphId, nLoadFlags);
if( rc != FT_Err_Ok )
return false;
if (mbArtBold)
FT_GlyphSlot_Embolden(maFaceFT->glyph);
FT_Glyph pGlyphFT;
rc = FT_Get_Glyph( maFaceFT->glyph, &pGlyphFT );
if( rc != FT_Err_Ok )
return false;
if( pGlyphFT->format != FT_GLYPH_FORMAT_OUTLINE )
{
FT_Done_Glyph( pGlyphFT );
return false;
}
if( mbArtItalic )
{
FT_Matrix aMatrix;
aMatrix.xx = aMatrix.yy = 0x10000L;
aMatrix.xy = 0x6000L;
aMatrix.yx = 0;
FT_Glyph_Transform( pGlyphFT, &aMatrix, nullptr );
}
FT_Outline& rOutline = reinterpret_cast<FT_OutlineGlyphRec*>(pGlyphFT)->outline;
if( !rOutline.n_points ) // blank glyphs are ok
{
FT_Done_Glyph( pGlyphFT );
return true;
}
long nMaxPoints = 1 + rOutline.n_points * 3;
tools::PolyPolygon aToolPolyPolygon;
PolyArgs aPolyArg( aToolPolyPolygon, nMaxPoints );
ApplyGlyphTransform(rGlyph.IsVertical(), pGlyphFT);
FT_Outline_Funcs aFuncs;
aFuncs.move_to = &FT_move_to;
aFuncs.line_to = &FT_line_to;
aFuncs.conic_to = &FT_conic_to;
aFuncs.cubic_to = &FT_cubic_to;
aFuncs.shift = 0;
aFuncs.delta = 0;
FT_Outline_Decompose( &rOutline, &aFuncs, static_cast<void*>(&aPolyArg) );
aPolyArg.ClosePolygon(); // close last polygon
FT_Done_Glyph( pGlyphFT );
// convert to basegfx polypolygon
// TODO: get rid of the intermediate tools polypolygon
rB2DPolyPoly = aToolPolyPolygon.getB2DPolyPolygon();
rB2DPolyPoly.transform(basegfx::utils::createScaleB2DHomMatrix( +1.0/(1<<6), -1.0/(1<<6) ));
return true;
}
const unsigned char* FreetypeFont::GetTable(const char* pName, sal_uLong* pLength) const
{
return mpFontInfo->GetTable( pName, pLength );
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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