Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 798 insertions, 0 deletions

diff --git a/vcl/inc/sft.hxx b/vcl/inc/sft.hxx
new file mode 100644
index 000000000..fb43e51a1
--- /dev/null
+++ b/vcl/inc/sft.hxx
@@ -0,0 +1,798 @@
+/* -*- 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 .
+ */
+
+/**
+ * @file sft.hxx
+ * @brief Sun Font Tools
+ */
+
+/*
+ *        Generated fonts contain an XUID entry in the form of:
+ *
+ *                  103 0 T C1 N C2 C3
+ *
+ *        103 - Sun's Adobe assigned XUID number. Contact person: Alexander Gelfenbain <gelf@eng.sun.com>
+ *
+ *        T  - font type. 0: Type 3, 1: Type 42
+ *        C1 - CRC-32 of the entire source TrueType font
+ *        N  - number of glyphs in the subset
+ *        C2 - CRC-32 of the array of glyph IDs used to generate the subset
+ *        C3 - CRC-32 of the array of encoding numbers used to generate the subset
+ *
+ */
+
+#ifndef INCLUDED_VCL_INC_SFT_HXX
+#define INCLUDED_VCL_INC_SFT_HXX
+
+#include <vcl/dllapi.h>
+#include <vcl/fontcapabilities.hxx>
+#include <vcl/fontcharmap.hxx>
+#include <i18nlangtag/lang.h>
+
+#include <array>
+#include <memory>
+#include <vector>
+#include <cstdint>
+
+namespace vcl
+{
+
+/*@{*/
+    typedef sal_Int32       F16Dot16;           /**< fixed: 16.16 */
+/*@}*/
+
+/** Return value of OpenTTFont() and CreateT3FromTTGlyphs() */
+    enum class SFErrCodes {
+        Ok,                              /**< no error                                     */
+        BadFile,                         /**< file not found                               */
+        FileIo,                          /**< file I/O error                               */
+        Memory,                          /**< memory allocation error                      */
+        GlyphNum,                        /**< incorrect number of glyphs                   */
+        BadArg,                          /**< incorrect arguments                          */
+        TtFormat,                        /**< incorrect TrueType font format               */
+        FontNo                           /**< incorrect logical font number of a TTC font  */
+    };
+
+#ifndef FW_THIN /* WIN32 compilation would conflict */
+/** Value of the weight member of the TTGlobalFontInfo struct */
+    enum WeightClass {
+        FW_THIN = 100,                      /**< Thin                               */
+        FW_EXTRALIGHT = 200,                /**< Extra-light (Ultra-light)          */
+        FW_LIGHT = 300,                     /**< Light                              */
+        FW_NORMAL = 400,                    /**< Normal (Regular)                   */
+        FW_MEDIUM = 500,                    /**< Medium                             */
+        FW_SEMIBOLD = 600,                  /**< Semi-bold (Demi-bold)              */
+        FW_BOLD = 700,                      /**< Bold                               */
+        FW_EXTRABOLD = 800,                 /**< Extra-bold (Ultra-bold)            */
+        FW_BLACK = 900                      /**< Black (Heavy)                      */
+    };
+#endif /* FW_THIN */
+
+/** Value of the width member of the TTGlobalFontInfo struct */
+    enum WidthClass {
+        FWIDTH_ULTRA_CONDENSED = 1,         /**< 50% of normal                      */
+        FWIDTH_EXTRA_CONDENSED = 2,         /**< 62.5% of normal                    */
+        FWIDTH_CONDENSED = 3,               /**< 75% of normal                      */
+        FWIDTH_SEMI_CONDENSED = 4,          /**< 87.5% of normal                    */
+        FWIDTH_NORMAL = 5,                  /**< Medium, 100%                       */
+        FWIDTH_SEMI_EXPANDED = 6,           /**< 112.5% of normal                   */
+        FWIDTH_EXPANDED = 7,                /**< 125% of normal                     */
+        FWIDTH_EXTRA_EXPANDED = 8,          /**< 150% of normal                     */
+        FWIDTH_ULTRA_EXPANDED = 9           /**< 200% of normal                     */
+    };
+
+/** Composite glyph flags definition */
+    enum CompositeFlags {
+        ARG_1_AND_2_ARE_WORDS     = 1,
+        ARGS_ARE_XY_VALUES        = 1<<1,
+        ROUND_XY_TO_GRID          = 1<<2,
+        WE_HAVE_A_SCALE           = 1<<3,
+        MORE_COMPONENTS           = 1<<5,
+        WE_HAVE_AN_X_AND_Y_SCALE  = 1<<6,
+        WE_HAVE_A_TWO_BY_TWO      = 1<<7,
+        WE_HAVE_INSTRUCTIONS      = 1<<8,
+        USE_MY_METRICS            = 1<<9,
+        OVERLAP_COMPOUND          = 1<<10
+    };
+
+/** Structure used by GetTTSimpleCharMetrics() functions */
+    typedef struct {
+        sal_uInt16 adv;                         /**< advance width or height            */
+        sal_Int16 sb;                           /**< left or top sidebearing            */
+    } TTSimpleGlyphMetrics;
+
+/** Structure used by the TrueType Creator and GetRawGlyphData() */
+
+    typedef struct {
+        sal_uInt32 glyphID;                     /**< glyph ID                           */
+        sal_uInt16 nbytes;                      /**< number of bytes in glyph data      */
+        sal_uInt8  *ptr;                         /**< pointer to glyph data              */
+        sal_uInt16 aw;                          /**< advance width                      */
+        sal_Int16  lsb;                         /**< left sidebearing                   */
+        bool compflag;                          /**< false- if non-composite */
+        sal_uInt16 npoints;                     /**< number of points                   */
+        sal_uInt16 ncontours;                   /**< number of contours                 */
+        /* */
+        sal_uInt32 newID;                       /**< used internally by the TTCR        */
+    } GlyphData;
+
+/** Structure used by the TrueType Creator and CreateTTFromTTGlyphs() */
+    typedef struct {
+        sal_uInt16 platformID;                  /**< Platform ID                                            */
+        sal_uInt16 encodingID;                  /**< Platform-specific encoding ID                          */
+        LanguageType languageID;                /**< Language ID                                            */
+        sal_uInt16 nameID;                      /**< Name ID                                                */
+        sal_uInt16 slen;                        /**< String length in bytes                                 */
+        sal_uInt8  *sptr;                        /**< Pointer to string data (not zero-terminated!)          */
+    } NameRecord;
+
+/** Return value of GetTTGlobalFontInfo() */
+
+    typedef struct TTGlobalFontInfo_ {
+        char *family;             /**< family name                                             */
+        sal_Unicode *ufamily;     /**< family name UCS2                                         */
+        char *subfamily;          /**< subfamily name                                          */
+        sal_Unicode *usubfamily;  /**< subfamily name UCS2 */
+        char *psname;             /**< PostScript name                                         */
+        sal_uInt16 macStyle;      /**< macstyle bits from 'HEAD' table */
+        int   weight;             /**< value of WeightClass or 0 if can't be determined        */
+        int   width;              /**< value of WidthClass or 0 if can't be determined         */
+        int   pitch;              /**< 0: proportional font, otherwise: monospaced             */
+        int   italicAngle;        /**< in counter-clockwise degrees * 65536                    */
+        int   xMin;               /**< global bounding box: xMin                               */
+        int   yMin;               /**< global bounding box: yMin                               */
+        int   xMax;               /**< global bounding box: xMax                               */
+        int   yMax;               /**< global bounding box: yMax                               */
+        int   ascender;           /**< typographic ascent.                                     */
+        int   descender;          /**< typographic descent.                                    */
+        int   linegap;            /**< typographic line gap.\ Negative values are treated as
+                                     zero in Win 3.1, System 6 and System 7.                 */
+        int   typoAscender;       /**< OS/2 portable typographic ascender                      */
+        int   typoDescender;      /**< OS/2 portable typographic descender                     */
+        int   typoLineGap;        /**< OS/2 portable typographic line gap                       */
+        int   winAscent;          /**< ascender metric for Windows                             */
+        int   winDescent;         /**< descender metric for Windows                            */
+        bool  symbolEncoded;      /**< true: MS symbol encoded */
+        sal_uInt8  panose[10];    /**< PANOSE classification number                            */
+        sal_uInt32 typeFlags;     /**< type flags (copyright bits)                             */
+        sal_uInt16 fsSelection;   /**< OS/2 fsSelection */
+    } TTGlobalFontInfo;
+
+/** ControlPoint structure used by GetTTGlyphPoints() */
+    typedef struct {
+        sal_uInt32 flags;             /**< 00000000 00000000 e0000000 bbbbbbbb */
+        /**< b - byte flags from the glyf array  */
+        /**< e == 0 - regular point              */
+        /**< e == 1 - end contour                */
+        sal_Int16 x;                  /**< X coordinate in EmSquare units      */
+        sal_Int16 y;                  /**< Y coordinate in EmSquare units      */
+    } ControlPoint;
+
+
+/*
+  Some table OS/2 consts
+  quick history:
+  OpenType has been created from TrueType
+  - original TrueType had an OS/2 table with a length of 68 bytes
+  (cf https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6OS2.html)
+  - There have been 6 versions (from version 0 to 5)
+  (cf https://docs.microsoft.com/en-us/typography/opentype/otspec140/os2ver0)
+
+  For the record:
+  // From Initial TrueType version
+  TYPE       NAME                       FROM BYTE
+  uint16     version                    0
+  int16      xAvgCharWidth              2
+  uint16     usWeightClass              4
+  uint16     usWidthClass               6
+  uint16     fsType                     8
+  int16      ySubscriptXSize           10
+  int16      ySubscriptYSize           12
+  int16      ySubscriptXOffset         14
+  int16      ySubscriptYOffset         16
+  int16      ySuperscriptXSize         18
+  int16      ySuperscriptYSize         20
+  int16      ySuperscriptXOffset       22
+  int16      ySuperscriptYOffset       24
+  int16      yStrikeoutSize            26
+  int16      yStrikeoutPosition        28
+  int16      sFamilyClass              30
+  uint8      panose[10]                32
+  uint32     ulUnicodeRange1           42
+  uint32     ulUnicodeRange2           46
+  uint32     ulUnicodeRange3           50
+  uint32     ulUnicodeRange4           54
+  Tag        achVendID                 58
+  uint16     fsSelection               62
+  uint16     usFirstCharIndex          64
+  uint16     usLastCharIndex           66
+
+  // From Version 0 of OpenType
+  int16      sTypoAscender             68
+  int16      sTypoDescender            70
+  int16      sTypoLineGap              72
+  uint16     usWinAscent               74
+  uint16     usWinDescent              76
+
+  => length for OpenType version 0 = 78 bytes
+
+  // From Version 1 of OpenType
+  uint32     ulCodePageRange1          78
+  uint32     ulCodePageRange2          82
+
+  => length for OpenType version 1 = 86 bytes
+
+  // From Version 2 of OpenType
+  // (idem for Versions 3 and 4)
+  int16      sxHeight                  86
+  int16      sCapHeight                88
+  uint16     usDefaultChar             90
+  uint16     usBreakChar               92
+  uint16     usMaxContext              94
+
+  => length for OpenType version 2, 3 and 4 = 96 bytes
+
+  // From Version 5 of OpenType
+  uint16     usLowerOpticalPointSize   96
+  uint16     usUpperOpticalPointSize   98
+  END                                 100
+
+  => length for OS/2 table version 5 = 100 bytes
+
+*/
+constexpr int OS2_Legacy_length = 68;
+constexpr int OS2_V0_length = 78;
+constexpr int OS2_V1_length = 86;
+
+constexpr int OS2_usWeightClass_offset = 4;
+constexpr int OS2_usWidthClass_offset = 6;
+constexpr int OS2_fsType_offset = 8;
+constexpr int OS2_panose_offset = 32;
+constexpr int OS2_panoseNbBytes_offset = 10;
+constexpr int OS2_ulUnicodeRange1_offset = 42;
+constexpr int OS2_ulUnicodeRange2_offset = 46;
+constexpr int OS2_ulUnicodeRange3_offset = 50;
+constexpr int OS2_ulUnicodeRange4_offset = 54;
+constexpr int OS2_fsSelection_offset = 62;
+constexpr int OS2_typoAscender_offset = 68;
+constexpr int OS2_typoDescender_offset = 70;
+constexpr int OS2_typoLineGap_offset = 72;
+constexpr int OS2_winAscent_offset = 74;
+constexpr int OS2_winDescent_offset = 76;
+constexpr int OS2_ulCodePageRange1_offset = 78;
+constexpr int OS2_ulCodePageRange2_offset = 82;
+
+/*
+  Some table hhea consts
+  cf https://docs.microsoft.com/fr-fr/typography/opentype/spec/hhea
+  TYPE       NAME                       FROM BYTE
+  uint16     majorVersion               0
+  uint16     minorVersion               2
+  FWORD      ascender                   4
+  FWORD      descender                  6
+  FWORD      lineGap                    8
+  UFWORD     advanceWidthMax           10
+  FWORD      minLeftSideBearing        12
+  FWORD      minRightSideBearing       14
+  FWORD      xMaxExtent                16
+  int16      caretSlopeRise            18
+  int16      caretSlopeRun             20
+  int16      caretOffset               22
+  int16      (reserved)                24
+  int16      (reserved)                26
+  int16      (reserved)                28
+  int16      (reserved)                30
+  int16      metricDataFormat          32
+  uint16     numberOfHMetrics          34
+  END                                  36
+
+  => length for hhea table = 36 bytes
+
+*/
+constexpr int HHEA_Length = 36;
+
+constexpr int HHEA_ascender_offset = 4;
+constexpr int HHEA_descender_offset = 6;
+constexpr int HHEA_lineGap_offset = 8;
+constexpr int HHEA_caretSlopeRise_offset = 18;
+constexpr int HHEA_caretSlopeRun_offset = 20;
+
+/*
+  Some table post consts
+  cf https://docs.microsoft.com/fr-fr/typography/opentype/spec/post
+  TYPE       NAME                       FROM BYTE
+  Fixed      version                    0
+  Fixed      italicAngle                4
+  FWord      underlinePosition          8
+  FWord      underlineThickness        10
+  uint32     isFixedPitch              12
+  ...
+
+*/
+constexpr int POST_italicAngle_offset = 4;
+constexpr int POST_underlinePosition_offset = 8;
+constexpr int POST_underlineThickness_offset = 10;
+constexpr int POST_isFixedPitch_offset = 12;
+
+/*
+  Some table head consts
+  cf https://docs.microsoft.com/fr-fr/typography/opentype/spec/head
+  TYPE       NAME                       FROM BYTE
+  uit16      majorVersion               0
+  uit16      minorVersion               2
+  Fixed      fontRevision               4
+  uint32     checkSumAdjustment         8
+  uint32     magicNumber               12 (= 0x5F0F3CF5)
+  uint16     flags                     16
+  uint16     unitsPerEm                18
+  LONGDATETIME created                 20
+  LONGDATETIME modified                28
+  int16      xMin                      36
+  int16      yMin                      38
+  int16      xMax                      40
+  int16      yMax                      42
+  uint16     macStyle                  44
+  uint16     lowestRecPPEM             46
+  int16      fontDirectionHint         48
+  int16      indexToLocFormat          50
+  int16      glyphDataFormat           52
+
+  END                                  54
+
+  => length head table = 54 bytes
+*/
+constexpr int HEAD_Length = 54;
+
+constexpr int HEAD_majorVersion_offset = 0;
+constexpr int HEAD_fontRevision_offset = 4;
+constexpr int HEAD_magicNumber_offset = 12;
+constexpr int HEAD_flags_offset = 16;
+constexpr int HEAD_unitsPerEm_offset = 18;
+constexpr int HEAD_created_offset = 20;
+constexpr int HEAD_xMin_offset = 36;
+constexpr int HEAD_yMin_offset = 38;
+constexpr int HEAD_xMax_offset = 40;
+constexpr int HEAD_yMax_offset = 42;
+constexpr int HEAD_macStyle_offset = 44;
+constexpr int HEAD_lowestRecPPEM_offset = 46;
+constexpr int HEAD_fontDirectionHint_offset = 48;
+constexpr int HEAD_indexToLocFormat_offset = 50;
+constexpr int HEAD_glyphDataFormat_offset = 52;
+
+/*
+  Some table maxp consts
+  cf https://docs.microsoft.com/fr-fr/typography/opentype/spec/maxp
+  For 0.5 version
+  TYPE       NAME                       FROM BYTE
+  Fixed      version                    0
+  uint16     numGlyphs                  4
+
+  For 1.0 Version
+  Fixed      version                    0
+  uint16     numGlyphs                  4
+  uint16     maxPoints                  6
+  uint16     maxContours                8
+  uint16     maxCompositePoints        10
+  uint16     maxCompositeContours      12
+  ...
+
+*/
+constexpr int MAXP_Version1Length = 32;
+
+constexpr int MAXP_numGlyphs_offset = 4;
+constexpr int MAXP_maxPoints_offset = 6;
+constexpr int MAXP_maxContours_offset = 8;
+constexpr int MAXP_maxCompositePoints_offset = 10;
+constexpr int MAXP_maxCompositeContours_offset = 12;
+
+/*
+  Some table glyf consts
+  cf https://docs.microsoft.com/fr-fr/typography/opentype/spec/glyf
+  For 0.5 version
+  TYPE       NAME                       FROM BYTE
+  int16      numberOfContours           0
+  int16      xMin                       2
+  int16      yMin                       4
+  int16      xMax                       6
+  int16      yMax                       8
+
+  END                                  10
+
+  => length glyf table = 10 bytes
+
+*/
+constexpr int GLYF_Length = 10;
+
+constexpr int GLYF_numberOfContours_offset = 0;
+constexpr int GLYF_xMin_offset = 2;
+constexpr int GLYF_yMin_offset = 4;
+constexpr int GLYF_xMax_offset = 6;
+constexpr int GLYF_yMax_offset = 8;
+
+constexpr sal_uInt32 T_true = 0x74727565;        /* 'true' */
+constexpr sal_uInt32 T_ttcf = 0x74746366;        /* 'ttcf' */
+constexpr sal_uInt32 T_otto = 0x4f54544f;        /* 'OTTO' */
+
+// standard TrueType table tags
+constexpr sal_uInt32 T_maxp = 0x6D617870;
+constexpr sal_uInt32 T_glyf = 0x676C7966;
+constexpr sal_uInt32 T_head = 0x68656164;
+constexpr sal_uInt32 T_loca = 0x6C6F6361;
+constexpr sal_uInt32 T_name = 0x6E616D65;
+constexpr sal_uInt32 T_hhea = 0x68686561;
+constexpr sal_uInt32 T_hmtx = 0x686D7478;
+constexpr sal_uInt32 T_cmap = 0x636D6170;
+constexpr sal_uInt32 T_vhea = 0x76686561;
+constexpr sal_uInt32 T_vmtx = 0x766D7478;
+constexpr sal_uInt32 T_OS2  = 0x4F532F32;
+constexpr sal_uInt32 T_post = 0x706F7374;
+constexpr sal_uInt32 T_cvt  = 0x63767420;
+constexpr sal_uInt32 T_prep = 0x70726570;
+constexpr sal_uInt32 T_fpgm = 0x6670676D;
+constexpr sal_uInt32 T_gsub = 0x47535542;
+constexpr sal_uInt32 T_CFF  = 0x43464620;
+
+class AbstractTrueTypeFont;
+class TrueTypeFont;
+
+/**
+ * @defgroup sft Sun Font Tools Exported Functions
+ */
+
+/**
+ * Get the number of fonts contained in a TrueType collection
+ * @param  fname - file name
+ * @return number of fonts or zero, if file is not a TTC file.
+ * @ingroup sft
+ */
+    int CountTTCFonts(const char* fname);
+
+/**
+ * TrueTypeFont constructor.
+ * The font file has to be provided as a memory buffer and length
+ * @param  pBuffer - memory buffer
+ * @param  nLen    - size of memory buffer
+ * @param  facenum - logical font number within a TTC file. This value is ignored
+ *                   for TrueType fonts
+ * @param  ttf     - returns the opened TrueTypeFont
+ * @param  xCharMap  - optional parsed character map
+ * @return value of SFErrCodes enum
+ * @ingroup sft
+ */
+    SFErrCodes VCL_DLLPUBLIC OpenTTFontBuffer(const void* pBuffer, sal_uInt32 nLen, sal_uInt32 facenum,
+                                              TrueTypeFont** ttf, const FontCharMapRef xCharMap = nullptr);
+#if !defined(_WIN32)
+/**
+ * TrueTypeFont constructor.
+ * Reads the font file and allocates the memory for the structure.
+ * on WIN32 the font has to be provided as a memory buffer and length
+ * @param  fname   - name of TrueType font file
+ * @param  facenum - logical font number within a TTC file. This value is ignored
+ *                   for TrueType fonts
+ * @param  ttf     - returns the opened TrueTypeFont
+ * @param  xCharMap  - optional parsed character map
+ * @return value of SFErrCodes enum
+ * @ingroup sft
+ */
+    SFErrCodes VCL_DLLPUBLIC OpenTTFontFile(const char *fname, sal_uInt32 facenum, TrueTypeFont** ttf,
+                                            const FontCharMapRef xCharMap = nullptr);
+#endif
+
+    bool VCL_DLLPUBLIC getTTCoverage(
+        std::optional<std::bitset<UnicodeCoverage::MAX_UC_ENUM>> & rUnicodeCoverage,
+        std::optional<std::bitset<CodePageCoverage::MAX_CP_ENUM>> & rCodePageCoverage,
+        const unsigned char* pTable, size_t nLength);
+
+/**
+ * TrueTypeFont destructor. Deallocates the memory.
+ * @ingroup sft
+ */
+    void VCL_DLLPUBLIC CloseTTFont(TrueTypeFont *);
+
+/**
+ * Extracts TrueType control points, and stores them in an allocated array pointed to
+ * by *pointArray. This function returns the number of extracted points.
+ *
+ * @param ttf         pointer to the TrueTypeFont structure
+ * @param glyphID     Glyph ID
+ * @param pointArray  Return value - address of the pointer to the first element of the array
+ *                    of points allocated by the function
+ * @return            Returns the number of points in *pointArray or -1 if glyphID is
+ *                    invalid.
+ * @ingroup sft
+ *
+ */
+    int GetTTGlyphPoints(AbstractTrueTypeFont *ttf, sal_uInt32 glyphID, ControlPoint **pointArray);
+
+/**
+ * Extracts raw glyph data from the 'glyf' table and returns it in an allocated
+ * GlyphData structure.
+ *
+ * @param ttf         pointer to the TrueTypeFont structure
+ * @param glyphID     Glyph ID
+ *
+ * @return            pointer to an allocated GlyphData structure or NULL if
+ *                    glyphID is not present in the font
+ * @ingroup sft
+ *
+ */
+    GlyphData *GetTTRawGlyphData(AbstractTrueTypeFont *ttf, sal_uInt32 glyphID);
+
+/**
+ * For a specified glyph adds all component glyphs IDs to the list and
+ * return their number. If the glyph is a single glyph it has one component
+ * glyph (which is added to the list) and the function returns 1.
+ * For a composite glyphs it returns the number of component glyphs
+ * and adds all of them to the list.
+ *
+ * @param ttf         pointer to the TrueTypeFont structure
+ * @param glyphID     Glyph ID
+ * @param glyphlist   list of glyphs
+ *
+ * @return            number of component glyphs
+ * @ingroup sft
+ *
+ */
+    int GetTTGlyphComponents(AbstractTrueTypeFont *ttf, sal_uInt32 glyphID, std::vector< sal_uInt32 >& glyphlist);
+
+/**
+ * Extracts all Name Records from the font and stores them in an allocated
+ * array of NameRecord structs
+ *
+ * @param ttf       pointer to the TrueTypeFont struct
+ * @param nr        pointer to the array of NameRecord structs
+ *
+ * @return          number of NameRecord structs
+ * @ingroup sft
+ */
+
+    int GetTTNameRecords(AbstractTrueTypeFont const *ttf, NameRecord **nr);
+
+/**
+ * Deallocates previously allocated array of NameRecords.
+ *
+ * @param nr        array of NameRecord structs
+ * @param n         number of elements in the array
+ *
+ * @ingroup sft
+ */
+    void DisposeNameRecords(NameRecord* nr, int n);
+
+/**
+ * Generates a new PostScript Type 3 font and dumps it to <b>outf</b> file.
+ * This function substitutes glyph 0 for all glyphIDs that are not found in the font.
+ * @param ttf         pointer to the TrueTypeFont structure
+ * @param outf        the resulting font is written to this stream
+ * @param fname       font name for the new font. If it is NULL the PostScript name of the
+ *                    original font will be used
+ * @param glyphArray  pointer to an array of glyphs that are to be extracted from ttf
+ * @param encoding    array of encoding values. encoding[i] specifies the position of the glyph
+ *                    glyphArray[i] in the encoding vector of the resulting Type3 font
+ * @param nGlyphs     number of glyph IDs in glyphArray and encoding values in encoding
+ * @param wmode       writing mode for the output file: 0 - horizontal, 1 - vertical
+ * @return            return the value of SFErrCodes enum
+ * @see               SFErrCodes
+ * @ingroup sft
+ *
+ */
+    SFErrCodes CreateT3FromTTGlyphs(TrueTypeFont *ttf, FILE *outf, const char *fname, sal_uInt16 const *glyphArray, sal_uInt8 *encoding, int nGlyphs, int wmode);
+
+/**
+ * Generates a new TrueType font and dumps it to <b>outf</b> file.
+ * This function substitutes glyph 0 for all glyphIDs that are not found in the font.
+ * @param ttf         pointer to the TrueTypeFont structure
+ * @param fname       file name for the output TrueType font file
+ * @param glyphArray  pointer to an array of glyphs that are to be extracted from ttf. The first
+ *                    element of this array has to be glyph 0 (default glyph)
+ * @param encoding    array of encoding values. encoding[i] specifies character code for
+ *                    the glyphID glyphArray[i]. Character code 0 usually points to a default
+ *                    glyph (glyphID 0)
+ * @param nGlyphs     number of glyph IDs in glyphArray and encoding values in encoding
+ * @param flags       or'ed TTCreationFlags
+ * @return            return the value of SFErrCodes enum
+ * @see               SFErrCodes
+ * @ingroup sft
+ *
+ */
+    VCL_DLLPUBLIC SFErrCodes CreateTTFromTTGlyphs(AbstractTrueTypeFont  *ttf,
+                              const char    *fname,
+                              sal_uInt16 const *glyphArray,
+                              sal_uInt8 const *encoding,
+                              int            nGlyphs);
+
+/**
+ * Generates a new PostScript Type42 font and dumps it to <b>outf</b> file.
+ * This function substitutes glyph 0 for all glyphIDs that are not found in the font.
+ * @param ttf         pointer to the TrueTypeFont structure
+ * @param outf        output stream for a resulting font
+ * @param psname      PostScript name of the resulting font
+ * @param glyphArray  pointer to an array of glyphs that are to be extracted from ttf. The first
+ *                    element of this array has to be glyph 0 (default glyph)
+ * @param encoding    array of encoding values. encoding[i] specifies character code for
+ *                    the glyphID glyphArray[i]. Character code 0 usually points to a default
+ *                    glyph (glyphID 0)
+ * @param nGlyphs     number of glyph IDs in glyphArray and encoding values in encoding
+ * @return            SFErrCodes::Ok - no errors
+ *                    SFErrCodes::GlyphNum - too many glyphs (> 255)
+ *                    SFErrCodes::TtFormat - corrupted TrueType fonts
+ *
+ * @see               SFErrCodes
+ * @ingroup sft
+ *
+ */
+    SFErrCodes CreateT42FromTTGlyphs(TrueTypeFont  *ttf,
+                               FILE          *outf,
+                               const char    *psname,
+                               sal_uInt16 const *glyphArray,
+                               sal_uInt8          *encoding,
+                               int            nGlyphs);
+
+/**
+ * Queries glyph metrics. Allocates an array of advance width/height values and returns it.
+ *
+ * @param ttf         pointer to the TrueTypeFont structure
+ * @param glyphArray  pointer to an array of glyphs that are to be extracted from ttf
+ * @param nGlyphs     number of glyph IDs in glyphArray and encoding values in encoding
+ * @param vertical    writing mode: false - horizontal, true - vertical
+ * @ingroup sft
+ *
+ */
+    VCL_DLLPUBLIC std::unique_ptr<sal_uInt16[]> GetTTSimpleGlyphMetrics(AbstractTrueTypeFont const *ttf, const sal_uInt16 *glyphArray, int nGlyphs, bool vertical);
+
+/**
+ * Returns global font information about the TrueType font.
+ * @see TTGlobalFontInfo
+ *
+ * @param ttf         pointer to a TrueTypeFont structure
+ * @param info        pointer to a TTGlobalFontInfo structure
+ * @ingroup sft
+ *
+ */
+    VCL_DLLPUBLIC void GetTTGlobalFontInfo(TrueTypeFont *ttf, TTGlobalFontInfo *info);
+
+/**
+ * Returns part of the head table info, normally collected by GetTTGlobalFontInfo.
+ *
+ * Just implemented separate, because this info not available via Qt API.
+ *
+ * @param ttf         pointer to a AbstractTrueTypeFont structure
+ * @param xMin        global glyph bounding box min X
+ * @param yMin        global glyph bounding box min Y
+ * @param xMax        global glyph bounding box max X
+ * @param yMax        global glyph bounding box max Y
+ * @param macStyle    encoded Mac style flags of the font
+ * @return            true, if table data could be decoded
+ * @ingroup sft
+ */
+    VCL_DLLPUBLIC bool GetTTGlobalFontHeadInfo(const AbstractTrueTypeFont *ttf, int& xMin, int& yMin, int& xMax, int& yMax, sal_uInt16& macStyle);
+
+/**
+ * Returns fonts metrics.
+ * @see TTGlobalFontInfo
+ *
+ * @param hhea        hhea table data
+ * @param os2         OS/2 table data
+ * @param info        pointer to a TTGlobalFontInfo structure
+ * @ingroup sft
+ *
+ */
+ void GetTTFontMetrics(const uint8_t *pHhea, size_t nHhea,
+                       const uint8_t *pOs2, size_t nOs2,
+                       TTGlobalFontInfo *info);
+
+/*- private definitions */
+
+/* indexes into TrueTypeFont::tables[] and TrueTypeFont::tlens[] */
+constexpr int O_maxp = 0;
+constexpr int O_glyf = 1;    /* 'glyf' */
+constexpr int O_head = 2;    /* 'head' */
+constexpr int O_loca = 3;    /* 'loca' */
+constexpr int O_name = 4;    /* 'name' */
+constexpr int O_hhea = 5;    /* 'hhea' */
+constexpr int O_hmtx = 6;    /* 'hmtx' */
+constexpr int O_cmap = 7;    /* 'cmap' */
+constexpr int O_vhea = 8;    /* 'vhea' */
+constexpr int O_vmtx = 9;    /* 'vmtx' */
+constexpr int O_OS2  = 10;   /* 'OS/2' */
+constexpr int O_post = 11;   /* 'post' */
+constexpr int O_cvt  = 12;   /* 'cvt_' - only used in TT->TT generation */
+constexpr int O_prep = 13;   /* 'prep' - only used in TT->TT generation */
+constexpr int O_fpgm = 14;   /* 'fpgm' - only used in TT->TT generation */
+constexpr int O_gsub = 15;   /* 'GSUB' */
+constexpr int O_CFF = 16;   /* 'CFF' */
+constexpr int NUM_TAGS = 17;
+
+class VCL_DLLPUBLIC AbstractTrueTypeFont
+{
+    std::string m_sFileName;
+    sal_uInt32 m_nGlyphs;
+    sal_uInt32 m_nHorzMetrics;
+    sal_uInt32 m_nVertMetrics; /* if not 0 => font has vertical metrics information */
+    sal_uInt32 m_nUnitsPerEm;
+    std::vector<sal_uInt32> m_aGlyphOffsets;
+    FontCharMapRef m_xCharMap;
+
+protected:
+    SFErrCodes indexGlyphData();
+
+public:
+    AbstractTrueTypeFont(const char* fileName = nullptr, const FontCharMapRef xCharMap = nullptr);
+    virtual ~AbstractTrueTypeFont();
+
+    std::string const & fileName() const { return m_sFileName; }
+    sal_uInt32 glyphCount() const { return m_nGlyphs; }
+    sal_uInt32 glyphOffset(sal_uInt32 glyphID) const;
+    sal_uInt32 horzMetricCount() const { return m_nHorzMetrics; }
+    sal_uInt32 vertMetricCount() const { return m_nVertMetrics; }
+    sal_uInt32 unitsPerEm() const { return m_nUnitsPerEm; }
+    const FontCharMapRef & GetCharMap() const { return m_xCharMap; }
+
+    virtual bool hasTable(sal_uInt32 ord) const = 0;
+    virtual const sal_uInt8* table(sal_uInt32 ord, sal_uInt32& size) const = 0;
+};
+
+class TrueTypeFont final : public AbstractTrueTypeFont
+{
+    struct TTFontTable_
+    {
+        const sal_uInt8* pData = nullptr; /* pointer to a raw subtable in the SFNT file */
+        sal_uInt32 nSize = 0; /* table size */
+    };
+
+    std::array<struct TTFontTable_, NUM_TAGS> m_aTableList;
+
+public:
+        sal_Int32   fsize;
+        sal_uInt8   *ptr;
+
+        char        *psname;
+        char        *family;
+        sal_Unicode *ufamily;
+        char        *subfamily;
+        sal_Unicode *usubfamily;
+
+        sal_uInt32  ntables;
+
+    TrueTypeFont(const char* pFileName = nullptr, const FontCharMapRef xCharMap = nullptr);
+    ~TrueTypeFont() override;
+
+    SFErrCodes open(sal_uInt32 facenum);
+
+    bool hasTable(sal_uInt32 ord) const override { return m_aTableList[ord].pData != nullptr; }
+    inline const sal_uInt8* table(sal_uInt32 ord, sal_uInt32& size) const override;
+};
+
+const sal_uInt8* TrueTypeFont::table(sal_uInt32 ord, sal_uInt32& size) const
+{
+    if (ord >= NUM_TAGS)
+    {
+        size = 0;
+        return nullptr;
+    }
+
+    auto& rTable = m_aTableList[ord];
+    size = rTable.nSize;
+    return rTable.pData;
+}
+
+} // namespace vcl
+
+#endif // INCLUDED_VCL_INC_SFT_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */