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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: */ |