vcl/source/fontsubset/fontsubset.cxx

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  27
  28 // MARKER(update_precomp.py): autogen include statement, do not remove
  29 #include "precompiled_vcl.hxx"
  30
  31 #include <vcl/fontsubset.hxx>
  32 #include <sft.hxx>
  33 #include <tools/debug.hxx>
  34
  35 // ====================================================================
  36
  37 FontSubsetInfo::FontSubsetInfo()
  38 :       m_nAscent( 0)
  39 ,       m_nDescent( 0)
  40 ,       m_nCapHeight( 0)
  41 ,       m_nFontType( FontSubsetInfo::NO_FONT)
  42 ,       mpInFontBytes( NULL)
  43 ,       mnInByteLength( 0)
  44 ,       meInFontType( FontSubsetInfo::NO_FONT)
  45 ,       mpSftTTFont( NULL)
  46 {}
  47
  48 // --------------------------------------------------------------------
  49
  50 FontSubsetInfo::~FontSubsetInfo()
  51 {}
  52
  53 // --------------------------------------------------------------------
  54
  55 // prepare subsetting for fonts where the input font file is mapped
  56 bool FontSubsetInfo::LoadFont(
  57     FontSubsetInfo::FontType eInFontType,
  58     const unsigned char* pInFontBytes, int nInByteLength)
  59 {
  60     DBG_ASSERT( (mpSftTTFont == NULL), "Subset from SFT and from mapped font-file requested");
  61     meInFontType = eInFontType;
  62     mpInFontBytes = pInFontBytes;
  63     mnInByteLength = nInByteLength;
  64     return (mnInByteLength > 0);
  65 }
  66
  67 // --------------------------------------------------------------------
  68
  69 // prepare subsetting for fonts that are known to the SFT-parser
  70 bool FontSubsetInfo::LoadFont( vcl::_TrueTypeFont* pSftTTFont )
  71 {
  72     DBG_ASSERT( (mpInFontBytes == NULL), "Subset from SFT and from mapped font-file requested");
  73     mpSftTTFont = pSftTTFont;
  74     meInFontType = ANY_SFNT;
  75     return (mpSftTTFont == NULL);
  76 }
  77
  78 // --------------------------------------------------------------------
  79
  80 bool FontSubsetInfo::CreateFontSubset(
  81     int nReqFontTypeMask,
  82     FILE* pOutFile, const char* pReqFontName,
  83     const long* pReqGlyphIds, const sal_uInt8* pReqEncodedIds, int nReqGlyphCount,
  84     sal_Int32* pOutGlyphWidths)
  85 {
  86     // prepare request details needed by all underlying subsetters
  87     mnReqFontTypeMask = nReqFontTypeMask;
  88     mpOutFile           = pOutFile;
  89     mpReqFontName       = pReqFontName;
  90     mpReqGlyphIds       = pReqGlyphIds;
  91     mpReqEncodedIds     = pReqEncodedIds;
  92     mnReqGlyphCount     = nReqGlyphCount;
  93
  94     // TODO: move the glyphid/encid/notdef reshuffling from the callers to here
  95
  96     // dispatch to underlying subsetters
  97     bool bOK = false;
  98
  99     // TODO: better match available input-type to possible subset-types
 100     switch( meInFontType) {
 101     case SFNT_TTF:
 102     case SFNT_CFF:
 103     case ANY_SFNT:
 104         bOK = CreateFontSubsetFromSfnt( pOutGlyphWidths);
 105         break;
 106     case CFF_FONT:
 107         bOK = CreateFontSubsetFromCff( pOutGlyphWidths);
 108         break;
 109     case TYPE1_PFA:
 110     case TYPE1_PFB:
 111     case ANY_TYPE1:
 112         bOK = CreateFontSubsetFromType1( pOutGlyphWidths);
 113         break;
 114         // fall trough
 115     case NO_FONT:
 116         // fall trough
 117     default:
 118         DBG_ERROR( "unhandled type in CreateFontSubset()");
 119         break;
 120     }
 121
 122     return bOK;
 123 }
 124
 125 // --------------------------------------------------------------------
 126
 127 // TODO: move function to sft.cxx to replace dummy implementation
 128 bool FontSubsetInfo::CreateFontSubsetFromSfnt( sal_Int32* pOutGlyphWidths )
 129 {
 130     // handle SFNT_CFF fonts
 131     int nCffLength = 0;
 132     const sal_uInt8* pCffBytes = NULL;
 133     if( GetSfntTable( mpSftTTFont, O_CFF, &pCffBytes, &nCffLength))
 134     {
 135         LoadFont( CFF_FONT, pCffBytes, nCffLength);
 136         const bool bOK = CreateFontSubsetFromCff( pOutGlyphWidths);
 137         return bOK;
 138     }
 139
 140     // handle SFNT_TTF fonts
 141     // by forwarding the subset request to AG's sft subsetter
 142 #if 1 // TODO: remove conversion tp 16bit glyphids when sft-subsetter has been updated
 143     sal_uInt16 aShortGlyphIds[256];
 144     for( int i = 0; i < mnReqGlyphCount; ++i)
 145         aShortGlyphIds[i] = (sal_uInt16)mpReqGlyphIds[i];
 146     // remove const_cast when sft-subsetter is const-correct
 147     sal_uInt8* pEncArray = const_cast<sal_uInt8*>( mpReqEncodedIds );
 148 #endif
 149     int nSFTErr = vcl::SF_BADARG;
 150     if( (mnReqFontTypeMask & TYPE42_FONT) != 0 )
 151     {
 152         nSFTErr = CreateT42FromTTGlyphs( mpSftTTFont, mpOutFile, mpReqFontName,
 153             aShortGlyphIds, pEncArray, mnReqGlyphCount );
 154     }
 155     else if( (mnReqFontTypeMask & TYPE3_FONT) != 0 )
 156     {
 157         nSFTErr = CreateT3FromTTGlyphs( mpSftTTFont, mpOutFile, mpReqFontName,
 158             aShortGlyphIds, pEncArray, mnReqGlyphCount,
 159                     0 /* 0 = horizontal, 1 = vertical */ );
 160     }
 161     else if( (mnReqFontTypeMask & SFNT_TTF) != 0 )
 162     {
 163         // TODO: use CreateTTFromTTGlyphs()
 164         // TODO: move functionality from callers here
 165     }
 166
 167     return (nSFTErr != vcl::SF_OK);
 168 }
 169
 170 // --------------------------------------------------------------------
 171
 172 // TODO: replace dummy implementation
 173 bool FontSubsetInfo::CreateFontSubsetFromType1( sal_Int32* pOutGlyphWidths)
 174 {
 175 #if 0
 176     // TODO: replace dummy implementation when someone needs this
 177 #else
 178     (void)pOutGlyphWidths;
 179     fprintf(stderr,"CreateFontSubsetFromType1: replace dummy implementation\n");
 180 #endif
 181     return false;
 182 }
 183
 184 // ====================================================================
 185