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
  26 #include "salglyphid.hxx"
  27
  28 namespace vcl { struct TrueTypeFont; }         ///< SFT's idea of a TTF font
  29
  30 class FontSubsetInfo final
  31 {
  32 public:
  33     explicit    FontSubsetInfo();
  34                 ~FontSubsetInfo();
  35
  36     enum FontType {
  37         NO_FONT     = 0,
  38         SFNT_TTF    = 1<<1,                     ///< SFNT container with TrueType glyphs
  39         SFNT_CFF    = 1<<2,                     ///< SFNT container with CFF-container
  40         TYPE1_PFA   = 1<<3,                     ///< PSType1 Postscript Font Ascii
  41         TYPE1_PFB   = 1<<4,                     ///< PSType1 Postscript Font Binary
  42         CFF_FONT    = 1<<5,                     ///< CFF-container with PSType2 glyphs
  43         TYPE3_FONT  = 1<<6,                     ///< PSType3 Postscript font
  44         TYPE42_FONT = 1<<7,                     ///< PSType42 wrapper for an SFNT_TTF
  45         ANY_SFNT    = SFNT_TTF | SFNT_CFF,
  46         ANY_TYPE1   = TYPE1_PFA | TYPE1_PFB
  47     };
  48
  49     bool        LoadFont( FontType eInFontType,
  50                     const unsigned char* pFontBytes, int nByteLength );
  51     bool        LoadFont( vcl::TrueTypeFont* pSftTrueTypeFont );
  52
  53     bool        CreateFontSubset( int nOutFontTypeMask,
  54                     FILE* pOutFile, const char* pOutFontName,
  55                     const sal_GlyphId* pGlyphIds, const sal_uInt8* pEncodedIds,
  56                     int nReqGlyphCount, sal_Int32* pOutGlyphWidths = nullptr );
  57
  58 public: // TODO: make subsetter results private and provide accessor methods instead
  59         // subsetter-provided subset details needed by e.g. Postscript or PDF
  60     OUString                m_aPSName;
  61     int                     m_nAscent;          ///< all metrics in PS font units
  62     int                     m_nDescent;
  63     int                     m_nCapHeight;
  64     Rectangle               m_aFontBBox;
  65     FontType                m_nFontType;        ///< font-type of subset result
  66
  67 private:
  68     // input-font-specific details
  69     unsigned const char*    mpInFontBytes;
  70     int                     mnInByteLength;
  71     FontType                meInFontType;       ///< allowed mask of input font-types
  72     vcl::TrueTypeFont*      mpSftTTFont;
  73
  74     // subset-request details
  75     int                     mnReqFontTypeMask;  ///< allowed subset-target font types
  76     FILE*                   mpOutFile;
  77     const char*             mpReqFontName;
  78     const sal_GlyphId*      mpReqGlyphIds;
  79     const sal_uInt8*        mpReqEncodedIds;
  80     int                     mnReqGlyphCount;
  81
  82     bool    CreateFontSubsetFromCff( sal_Int32* pOutGlyphWidths );
  83     bool    CreateFontSubsetFromSfnt( sal_Int32* pOutGlyphWidths );
  84     static bool CreateFontSubsetFromType1( sal_Int32* pOutGlyphWidths );
  85 };
  86
  87 #endif // INCLUDED_VCL_INC_FONTSUBSET_HXX
  88
  89 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */