vcl/inc/fontsubset.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_VCL_INC_FONTSUBSET_HXX
  21 #define INCLUDED_VCL_INC_FONTSUBSET_HXX
  22
  23 #include <rtl/ustring.hxx>
  24 #include <tools/gen.hxx>
  25 #include <cstdio>
  26
  27 #include "salglyphid.hxx"
  28 #include "vcl/dllapi.h"
  29
  30 namespace vcl { struct _TrueTypeFont; } ///< SFT's idea of a TTF font
  31
  32 class VCL_DLLPUBLIC FontSubsetInfo
  33 {
  34 public:
  35     explicit    FontSubsetInfo();
  36     virtual     ~FontSubsetInfo();
  37
  38     enum FontType {
  39         NO_FONT     = 0,
  40         SFNT_TTF    = 1<<1,     ///< SFNT container with TrueType glyphs
  41         SFNT_CFF    = 1<<2,     ///< SFNT container with CFF-container
  42         TYPE1_PFA   = 1<<3,     ///< PSType1 Postscript Font Ascii
  43         TYPE1_PFB   = 1<<4,     ///< PSType1 Postscript Font Binary
  44         CFF_FONT    = 1<<5,     ///< CFF-container with PSType2 glyphs
  45         TYPE3_FONT  = 1<<6,     ///< PSType3 Postscript font
  46         TYPE42_FONT = 1<<7,     ///< PSType42 wrapper for an SFNT_TTF
  47         ANY_SFNT    = SFNT_TTF | SFNT_CFF,
  48         ANY_TYPE1   = TYPE1_PFA | TYPE1_PFB,
  49         ANY_FONT    = 0xFF
  50     };
  51
  52     bool        LoadFont( FontType eInFontType,
  53                     const unsigned char* pFontBytes, int nByteLength );
  54     bool        LoadFont( vcl::_TrueTypeFont* pSftTrueTypeFont );
  55
  56     bool        CreateFontSubset( int nOutFontTypeMask,
  57                     FILE* pOutFile, const char* pOutFontName,
  58                     const sal_GlyphId* pGlyphIds, const sal_uInt8* pEncodedIds,
  59                     int nReqGlyphCount, sal_Int32* pOutGlyphWidths = NULL );
  60
  61 public: // TODO: make subsetter results private and provide accessor methods instead
  62         // subsetter-provided subset details needed by e.g. Postscript or PDF
  63     OUString    m_aPSName;
  64     int         m_nAscent; ///< all metrics in PS font units
  65     int         m_nDescent;
  66     int         m_nCapHeight;
  67     Rectangle   m_aFontBBox;
  68     FontType    m_nFontType;    ///< font-type of subset result
  69
  70 private:
  71     // input-font-specific details
  72     unsigned const char*    mpInFontBytes;
  73     int                     mnInByteLength;
  74     FontType                meInFontType;   ///< allowed mask of input font-types
  75     vcl::_TrueTypeFont*     mpSftTTFont;
  76
  77     // subset-request details
  78     int                     mnReqFontTypeMask;  ///< allowed subset-target font types
  79     FILE*                   mpOutFile;
  80     const char*             mpReqFontName;
  81     const sal_GlyphId*      mpReqGlyphIds;
  82     const sal_uInt8*        mpReqEncodedIds;
  83     int                     mnReqGlyphCount;
  84
  85 protected:
  86     bool    CreateFontSubsetFromCff( sal_Int32* pOutGlyphWidths = NULL );
  87     bool    CreateFontSubsetFromSfnt( sal_Int32* pOutGlyphWidths = NULL );
  88     static bool CreateFontSubsetFromType1( sal_Int32* pOutGlyphWidths = NULL );
  89 };
  90
  91 #endif // INCLUDED_VCL_INC_FONTSUBSET_HXX
  92
  93 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */