561a02ec72
Change-Id: I5a6319ba1667af6e9b7b92c22f858188c28c4c61 Reviewed-on: https://gerrit.libreoffice.org/38835 Tested-by: Jenkins <ci@libreoffice.org> Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
519 lines
23 KiB
C++
519 lines
23 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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/**
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* @file sft.hxx
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* @brief Sun Font Tools
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* @author Alexander Gelfenbain
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*/
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/*
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* Generated fonts contain an XUID entry in the form of:
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*
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* 103 0 T C1 N C2 C3
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*
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* 103 - Sun's Adobe assigned XUID number. Contact person: Alexander Gelfenbain <gelf@eng.sun.com>
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*
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* T - font type. 0: Type 3, 1: Type 42
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* C1 - CRC-32 of the entire source TrueType font
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* N - number of glyphs in the subset
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* C2 - CRC-32 of the array of glyph IDs used to generate the subset
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* C3 - CRC-32 of the array of encoding numbers used to generate the subset
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*
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*/
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#ifndef INCLUDED_VCL_INC_SFT_HXX
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#define INCLUDED_VCL_INC_SFT_HXX
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#ifdef UNX
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#include <sys/types.h>
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#include <unistd.h>
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#endif
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#include <vcl/dllapi.h>
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#include <vcl/fontcapabilities.hxx>
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#include <i18nlangtag/lang.h>
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#include <vector>
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#include <cstdint>
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namespace vcl
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{
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/*@{*/
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typedef sal_Int16 F2Dot14; /**< fixed: 2.14 */
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typedef sal_Int32 F16Dot16; /**< fixed: 16.16 */
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/*@}*/
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/** Return value of OpenTTFont() and CreateT3FromTTGlyphs() */
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enum SFErrCodes {
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SF_OK, /**< no error */
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SF_BADFILE, /**< file not found */
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SF_FILEIO, /**< file I/O error */
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SF_MEMORY, /**< memory allocation error */
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SF_GLYPHNUM, /**< incorrect number of glyphs */
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SF_BADARG, /**< incorrect arguments */
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SF_TTFORMAT, /**< incorrect TrueType font format */
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SF_TABLEFORMAT, /**< incorrect format of a TrueType table */
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SF_FONTNO /**< incorrect logical font number of a TTC font */
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};
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#ifndef FW_THIN /* WIN32 compilation would conflict */
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/** Value of the weight member of the TTGlobalFontInfo struct */
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enum WeightClass {
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FW_THIN = 100, /**< Thin */
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FW_EXTRALIGHT = 200, /**< Extra-light (Ultra-light) */
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FW_LIGHT = 300, /**< Light */
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FW_NORMAL = 400, /**< Normal (Regular) */
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FW_MEDIUM = 500, /**< Medium */
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FW_SEMIBOLD = 600, /**< Semi-bold (Demi-bold) */
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FW_BOLD = 700, /**< Bold */
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FW_EXTRABOLD = 800, /**< Extra-bold (Ultra-bold) */
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FW_BLACK = 900 /**< Black (Heavy) */
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};
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#endif /* FW_THIN */
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/** Value of the width member of the TTGlobalFontInfo struct */
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enum WidthClass {
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FWIDTH_ULTRA_CONDENSED = 1, /**< 50% of normal */
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FWIDTH_EXTRA_CONDENSED = 2, /**< 62.5% of normal */
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FWIDTH_CONDENSED = 3, /**< 75% of normal */
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FWIDTH_SEMI_CONDENSED = 4, /**< 87.5% of normal */
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FWIDTH_NORMAL = 5, /**< Medium, 100% */
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FWIDTH_SEMI_EXPANDED = 6, /**< 112.5% of normal */
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FWIDTH_EXPANDED = 7, /**< 125% of normal */
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FWIDTH_EXTRA_EXPANDED = 8, /**< 150% of normal */
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FWIDTH_ULTRA_EXPANDED = 9 /**< 200% of normal */
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};
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/** Type of the 'kern' table, stored in TrueTypeFont::kerntype */
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enum KernType {
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KT_NONE = 0, /**< no kern table */
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KT_APPLE_NEW = 1, /**< new Apple kern table */
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KT_MICROSOFT = 2 /**< Microsoft table */
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};
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/** Composite glyph flags definition */
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enum CompositeFlags {
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ARG_1_AND_2_ARE_WORDS = 1,
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ARGS_ARE_XY_VALUES = 1<<1,
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ROUND_XY_TO_GRID = 1<<2,
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WE_HAVE_A_SCALE = 1<<3,
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MORE_COMPONENTS = 1<<5,
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WE_HAVE_AN_X_AND_Y_SCALE = 1<<6,
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WE_HAVE_A_TWO_BY_TWO = 1<<7,
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WE_HAVE_INSTRUCTIONS = 1<<8,
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USE_MY_METRICS = 1<<9,
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OVERLAP_COMPOUND = 1<<10
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};
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/** Structure used by GetTTSimpleGlyphMetrics() and GetTTSimpleCharMetrics() functions */
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typedef struct {
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sal_uInt16 adv; /**< advance width or height */
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sal_Int16 sb; /**< left or top sidebearing */
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} TTSimpleGlyphMetrics;
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/** Structure used by the TrueType Creator and GetRawGlyphData() */
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typedef struct {
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sal_uInt32 glyphID; /**< glyph ID */
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sal_uInt16 nbytes; /**< number of bytes in glyph data */
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sal_uInt8 *ptr; /**< pointer to glyph data */
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sal_uInt16 aw; /**< advance width */
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sal_Int16 lsb; /**< left sidebearing */
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bool compflag; /**< false- if non-composite */
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sal_uInt16 npoints; /**< number of points */
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sal_uInt16 ncontours; /**< number of contours */
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/* */
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sal_uInt32 newID; /**< used internally by the TTCR */
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} GlyphData;
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/** Structure used by the TrueType Creator and CreateTTFromTTGlyphs() */
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typedef struct {
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sal_uInt16 platformID; /**< Platform ID */
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sal_uInt16 encodingID; /**< Platform-specific encoding ID */
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LanguageType languageID; /**< Language ID */
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sal_uInt16 nameID; /**< Name ID */
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sal_uInt16 slen; /**< String length in bytes */
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sal_uInt8 *sptr; /**< Pointer to string data (not zero-terminated!) */
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} NameRecord;
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/** Return value of GetTTGlobalFontInfo() */
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typedef struct {
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char *family; /**< family name */
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sal_Unicode *ufamily; /**< family name UCS2 */
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char *subfamily; /**< subfamily name */
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sal_Unicode *usubfamily; /**< subfamily name UCS2 */
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char *psname; /**< PostScript name */
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sal_uInt16 macStyle; /**< macstyle bits from 'HEAD' table */
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int weight; /**< value of WeightClass or 0 if can't be determined */
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int width; /**< value of WidthClass or 0 if can't be determined */
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int pitch; /**< 0: proportional font, otherwise: monospaced */
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int italicAngle; /**< in counter-clockwise degrees * 65536 */
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int xMin; /**< global bounding box: xMin */
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int yMin; /**< global bounding box: yMin */
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int xMax; /**< global bounding box: xMax */
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int yMax; /**< global bounding box: yMax */
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int ascender; /**< typographic ascent. */
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int descender; /**< typographic descent. */
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int linegap; /**< typographic line gap.\ Negative values are treated as
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zero in Win 3.1, System 6 and System 7. */
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int typoAscender; /**< OS/2 portable typographic ascender */
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int typoDescender; /**< OS/2 portable typographic descender */
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int typoLineGap; /**< OS/2 portable typographic line gap */
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int winAscent; /**< ascender metric for Windows */
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int winDescent; /**< descender metric for Windows */
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bool symbolEncoded; /**< true: MS symbol encoded */
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sal_uInt8 panose[10]; /**< PANOSE classification number */
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sal_uInt32 typeFlags; /**< type flags (copyright bits + PS-OpenType flag) */
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sal_uInt16 fsSelection; /**< OS/2 fsSelection */
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} TTGlobalFontInfo;
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#define TYPEFLAG_INVALID 0x8000000
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#define TYPEFLAG_COPYRIGHT_MASK 0x000000E
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#define TYPEFLAG_PS_OPENTYPE 0x0010000
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/** Structure used by KernGlyphs() */
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typedef struct {
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int x; /**< positive: right, negative: left */
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int y; /**< positive: up, negative: down */
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} KernData;
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/** ControlPoint structure used by GetTTGlyphPoints() */
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typedef struct {
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sal_uInt32 flags; /**< 00000000 00000000 e0000000 bbbbbbbb */
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/**< b - byte flags from the glyf array */
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/**< e == 0 - regular point */
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/**< e == 1 - end contour */
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sal_Int16 x; /**< X coordinate in EmSquare units */
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sal_Int16 y; /**< Y coordinate in EmSquare units */
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} ControlPoint;
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struct TrueTypeFont;
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/**
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* @defgroup sft Sun Font Tools Exported Functions
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*/
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/**
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* Get the number of fonts contained in a TrueType collection
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* @param fname - file name
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* @return number of fonts or zero, if file is not a TTC file.
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* @ingroup sft
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*/
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int CountTTCFonts(const char* fname);
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/**
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* TrueTypeFont constructor.
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* The font file has to be provided as a memory buffer and length
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* @param pBuffer - memory buffer
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* @param nLen - size of memory buffer
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* @param facenum - logical font number within a TTC file. This value is ignored
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* for TrueType fonts
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* @param ttf - array of TrueTypeFonts
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* @return value of SFErrCodes enum
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* @ingroup sft
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*/
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int VCL_DLLPUBLIC OpenTTFontBuffer(const void* pBuffer, sal_uInt32 nLen, sal_uInt32 facenum, TrueTypeFont** ttf);
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#if !defined(_WIN32)
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/**
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* TrueTypeFont constructor.
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* Reads the font file and allocates the memory for the structure.
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* on WIN32 the font has to be provided as a memory buffer and length
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* @param fname - name of TrueType font file
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* @param facenum - logical font number within a TTC file. This value is ignored
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* for TrueType fonts
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* @param ttf - array of TrueTypeFonts
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* @return value of SFErrCodes enum
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* @ingroup sft
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*/
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int VCL_DLLPUBLIC OpenTTFontFile(const char *fname, sal_uInt32 facenum, TrueTypeFont** ttf);
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#endif
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bool getTTCoverage(
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boost::optional<std::bitset<UnicodeCoverage::MAX_UC_ENUM>> & rUnicodeCoverage,
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boost::optional<std::bitset<CodePageCoverage::MAX_CP_ENUM>> & rCodePageCoverage,
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const unsigned char* pTable, size_t nLength);
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/**
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* TrueTypeFont destructor. Deallocates the memory.
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* @ingroup sft
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*/
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void VCL_DLLPUBLIC CloseTTFont(TrueTypeFont *);
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/**
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* Extracts TrueType control points, and stores them in an allocated array pointed to
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* by *pointArray. This function returns the number of extracted points.
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*
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* @param ttf pointer to the TrueTypeFont structure
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* @param glyphID Glyph ID
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* @param pointArray Return value - address of the pointer to the first element of the array
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* of points allocated by the function
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* @return Returns the number of points in *pointArray or -1 if glyphID is
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* invalid.
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* @ingroup sft
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*
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*/
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int GetTTGlyphPoints(TrueTypeFont *ttf, sal_uInt32 glyphID, ControlPoint **pointArray);
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/**
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* Extracts raw glyph data from the 'glyf' table and returns it in an allocated
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* GlyphData structure.
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*
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* @param ttf pointer to the TrueTypeFont structure
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* @param glyphID Glyph ID
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*
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* @return pointer to an allocated GlyphData structure or NULL if
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* glyphID is not present in the font
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* @ingroup sft
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*
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*/
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GlyphData *GetTTRawGlyphData(TrueTypeFont *ttf, sal_uInt32 glyphID);
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/**
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* For a specified glyph adds all component glyphs IDs to the list and
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* return their number. If the glyph is a single glyph it has one component
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* glyph (which is added to the list) and the function returns 1.
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* For a composite glyphs it returns the number of component glyphs
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* and adds all of them to the list.
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*
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* @param ttf pointer to the TrueTypeFont structure
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* @param glyphID Glyph ID
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* @param glyphlist list of glyphs
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*
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* @return number of component glyphs
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* @ingroup sft
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*
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*/
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int GetTTGlyphComponents(TrueTypeFont *ttf, sal_uInt32 glyphID, std::vector< sal_uInt32 >& glyphlist);
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/**
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* Extracts all Name Records from the font and stores them in an allocated
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* array of NameRecord structs
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*
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* @param ttf pointer to the TrueTypeFont struct
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* @param nr pointer to the array of NameRecord structs
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*
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* @return number of NameRecord structs
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* @ingroup sft
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*/
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int GetTTNameRecords(TrueTypeFont *ttf, NameRecord **nr);
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/**
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* Deallocates previously allocated array of NameRecords.
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*
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* @param nr array of NameRecord structs
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* @param n number of elements in the array
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*
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* @ingroup sft
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*/
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void DisposeNameRecords(NameRecord* nr, int n);
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/**
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* Generates a new PostScript Type 3 font and dumps it to <b>outf</b> file.
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* This function substitutes glyph 0 for all glyphIDs that are not found in the font.
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* @param ttf pointer to the TrueTypeFont structure
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* @param outf the resulting font is written to this stream
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* @param fname font name for the new font. If it is NULL the PostScript name of the
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* original font will be used
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* @param glyphArray pointer to an array of glyphs that are to be extracted from ttf
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* @param encoding array of encoding values. encoding[i] specifies the position of the glyph
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* glyphArray[i] in the encoding vector of the resulting Type3 font
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* @param nGlyphs number of glyph IDs in glyphArray and encoding values in encoding
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* @param wmode writing mode for the output file: 0 - horizontal, 1 - vertical
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* @return return the value of SFErrCodes enum
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* @see SFErrCodes
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* @ingroup sft
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*
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*/
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int CreateT3FromTTGlyphs(TrueTypeFont *ttf, FILE *outf, const char *fname, sal_uInt16 *glyphArray, sal_uInt8 *encoding, int nGlyphs, int wmode);
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/**
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* Generates a new TrueType font and dumps it to <b>outf</b> file.
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* This function substitutes glyph 0 for all glyphIDs that are not found in the font.
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* @param ttf pointer to the TrueTypeFont structure
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* @param fname file name for the output TrueType font file
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* @param glyphArray pointer to an array of glyphs that are to be extracted from ttf. The first
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* element of this array has to be glyph 0 (default glyph)
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* @param encoding array of encoding values. encoding[i] specifies character code for
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* the glyphID glyphArray[i]. Character code 0 usually points to a default
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* glyph (glyphID 0)
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* @param nGlyphs number of glyph IDs in glyphArray and encoding values in encoding
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* @param nNameRecs number of NameRecords for the font, if 0 the name table from the
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* original font will be used
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* @param nr array of NameRecords
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* @param flags or'ed TTCreationFlags
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* @return return the value of SFErrCodes enum
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* @see SFErrCodes
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* @ingroup sft
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*
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*/
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int CreateTTFromTTGlyphs(TrueTypeFont *ttf,
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const char *fname,
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sal_uInt16 *glyphArray,
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sal_uInt8 *encoding,
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int nGlyphs,
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int nNameRecs,
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NameRecord *nr);
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/**
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* Generates a new PostScript Type42 font and dumps it to <b>outf</b> file.
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* This function substitutes glyph 0 for all glyphIDs that are not found in the font.
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* @param ttf pointer to the TrueTypeFont structure
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* @param outf output stream for a resulting font
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* @param psname PostScript name of the resulting font
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* @param glyphArray pointer to an array of glyphs that are to be extracted from ttf. The first
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* element of this array has to be glyph 0 (default glyph)
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* @param encoding array of encoding values. encoding[i] specifies character code for
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* the glyphID glyphArray[i]. Character code 0 usually points to a default
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* glyph (glyphID 0)
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* @param nGlyphs number of glyph IDs in glyphArray and encoding values in encoding
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* @return SF_OK - no errors
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* SF_GLYPHNUM - too many glyphs (> 255)
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* SF_TTFORMAT - corrupted TrueType fonts
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*
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* @see SFErrCodes
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* @ingroup sft
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*
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*/
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int CreateT42FromTTGlyphs(TrueTypeFont *ttf,
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FILE *outf,
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const char *psname,
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sal_uInt16 *glyphArray,
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sal_uInt8 *encoding,
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int nGlyphs);
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/**
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* Queries glyph metrics. Allocates an array of TTSimpleGlyphMetrics structs and returns it.
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*
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* @param ttf pointer to the TrueTypeFont structure
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* @param glyphArray pointer to an array of glyphs that are to be extracted from ttf
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* @param nGlyphs number of glyph IDs in glyphArray and encoding values in encoding
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* @param vertical writing mode: false - horizontal, true - vertical
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* @ingroup sft
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*
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*/
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TTSimpleGlyphMetrics *GetTTSimpleGlyphMetrics(TrueTypeFont *ttf, const sal_uInt16 *glyphArray, int nGlyphs, bool vertical);
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#if defined(_WIN32) || defined(MACOSX) || defined(IOS)
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/**
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* Maps a Unicode (UCS-2) character to a glyph ID and returns it. Missing glyph has
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* a glyphID of 0 so this function can be used to test if a character is encoded in the font.
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*
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* @param ttf pointer to the TrueTypeFont structure
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* @param ch Unicode (UCS-2) character
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* @return glyph ID, if the character is missing in the font, the return value is 0.
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* @ingroup sft
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*/
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sal_uInt16 MapChar(TrueTypeFont *ttf, sal_uInt16 ch);
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#endif
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/**
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* Returns global font information about the TrueType font.
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* @see TTGlobalFontInfo
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*
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* @param ttf pointer to a TrueTypeFont structure
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* @param info pointer to a TTGlobalFontInfo structure
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* @ingroup sft
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*
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*/
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void GetTTGlobalFontInfo(TrueTypeFont *ttf, TTGlobalFontInfo *info);
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/**
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* Returns fonts metrics.
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* @see TTGlobalFontInfo
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*
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* @param hhea hhea table data
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* @param os2 OS/2 table data
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* @param info pointer to a TTGlobalFontInfo structure
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* @ingroup sft
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*
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*/
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void GetTTFontMterics(const std::vector<uint8_t>& hhea,
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const std::vector<uint8_t>& os2,
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TTGlobalFontInfo *info);
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/**
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* returns the number of glyphs in a font
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*/
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int GetTTGlyphCount( TrueTypeFont* ttf );
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/**
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* provide access to the raw data of a SFNT-container's subtable
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*/
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bool GetSfntTable( TrueTypeFont* ttf, int nSubtableIndex,
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const sal_uInt8** ppRawBytes, int* pRawLength );
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/*- private definitions */
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struct TrueTypeFont {
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char *fname;
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sal_Int32 fsize;
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sal_uInt8 *ptr;
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char *psname;
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char *family;
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sal_Unicode *ufamily;
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char *subfamily;
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sal_Unicode *usubfamily;
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sal_uInt32 ntables;
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sal_uInt32 *goffsets;
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sal_uInt32 nglyphs;
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sal_uInt32 unitsPerEm;
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sal_uInt32 numberOfHMetrics;
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sal_uInt32 numOfLongVerMetrics; /* if this number is not 0, font has vertical metrics information */
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const sal_uInt8* cmap;
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int cmapType;
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sal_uInt32 (*mapper)(const sal_uInt8 *, sal_uInt32, sal_uInt32); /* character to glyphID translation function */
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const sal_uInt8 **tables; /* array of pointers to raw subtables in SFNT file */
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sal_uInt32 *tlens; /* array of table lengths */
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sal_uInt32 nkern; /* number of kern subtables */
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const sal_uInt8** kerntables; /* array of pointers to kern subtables */
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};
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/* indexes into TrueTypeFont::tables[] and TrueTypeFont::tlens[] */
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#define O_maxp 0 /* 'maxp' */
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#define O_glyf 1 /* 'glyf' */
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#define O_head 2 /* 'head' */
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#define O_loca 3 /* 'loca' */
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#define O_name 4 /* 'name' */
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#define O_hhea 5 /* 'hhea' */
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#define O_hmtx 6 /* 'hmtx' */
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#define O_cmap 7 /* 'cmap' */
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#define O_vhea 8 /* 'vhea' */
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#define O_vmtx 9 /* 'vmtx' */
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#define O_OS2 10 /* 'OS/2' */
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#define O_post 11 /* 'post' */
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#define O_kern 12 /* 'kern' */
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#define O_cvt 13 /* 'cvt_' - only used in TT->TT generation */
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#define O_prep 14 /* 'prep' - only used in TT->TT generation */
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#define O_fpgm 15 /* 'fpgm' - only used in TT->TT generation */
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#define O_gsub 16 /* 'GSUB' */
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#define O_CFF 17 /* 'CFF' */
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#define NUM_TAGS 18
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} // namespace vcl
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#endif // INCLUDED_VCL_INC_SFT_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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