Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 208 insertions, 0 deletions

diff --git a/gfx/graphite2/src/inc/TtfUtil.h b/gfx/graphite2/src/inc/TtfUtil.h
new file mode 100644
index 0000000000..3952bc06fb
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+++ b/gfx/graphite2/src/inc/TtfUtil.h
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+/*  GRAPHITE2 LICENSING
+
+    Copyright 2010, SIL International
+    All rights reserved.
+
+    This library is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published
+    by the Free Software Foundation; either version 2.1 of License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should also have received a copy of the GNU Lesser General Public
+    License along with this library in the file named "LICENSE".
+    If not, write to the Free Software Foundation, 51 Franklin Street,
+    Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
+    internet at http://www.fsf.org/licenses/lgpl.html.
+
+Alternatively, the contents of this file may be used under the terms of the
+Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
+License, as published by the Free Software Foundation, either version 2
+of the License or (at your option) any later version.
+*/
+#pragma once
+/*--------------------------------------------------------------------*//*:Ignore this sentence.
+
+File: TtfUtil.h
+Responsibility: Alan Ward
+Last reviewed: Not yet.
+
+Description:
+    Utility class for handling TrueType font files.
+----------------------------------------------------------------------------------------------*/
+
+
+#include <cstddef>
+
+namespace graphite2
+{
+namespace TtfUtil
+{
+
+#define OVERFLOW_OFFSET_CHECK(p, o) (o + reinterpret_cast<size_t>(p) < reinterpret_cast<size_t>(p))
+
+typedef long fontTableId32;
+typedef unsigned short gid16;
+
+#define TTF_TAG(a,b,c,d) ((a << 24UL) + (b << 16UL) + (c << 8UL) + (d))
+
+// Enumeration used to specify a table in a TTF file
+class Tag
+{
+    unsigned int _v;
+public:
+    Tag(const char n[5]) throw()            : _v(TTF_TAG(n[0],n[1],n[2],n[3])) {}
+    Tag(const unsigned int tag) throw()    : _v(tag) {}
+
+    operator unsigned int () const throw () { return _v; }
+
+    enum
+    {
+        Feat = TTF_TAG('F','e','a','t'),
+        Glat = TTF_TAG('G','l','a','t'),
+        Gloc = TTF_TAG('G','l','o','c'),
+        Sile = TTF_TAG('S','i','l','e'),
+        Silf = TTF_TAG('S','i','l','f'),
+        Sill = TTF_TAG('S','i','l','l'),
+        cmap = TTF_TAG('c','m','a','p'),
+        cvt  = TTF_TAG('c','v','t',' '),
+        cryp = TTF_TAG('c','r','y','p'),
+        head = TTF_TAG('h','e','a','d'),
+        fpgm = TTF_TAG('f','p','g','m'),
+        gdir = TTF_TAG('g','d','i','r'),
+        glyf = TTF_TAG('g','l','y','f'),
+        hdmx = TTF_TAG('h','d','m','x'),
+        hhea = TTF_TAG('h','h','e','a'),
+        hmtx = TTF_TAG('h','m','t','x'),
+        loca = TTF_TAG('l','o','c','a'),
+        kern = TTF_TAG('k','e','r','n'),
+        LTSH = TTF_TAG('L','T','S','H'),
+        maxp = TTF_TAG('m','a','x','p'),
+        name = TTF_TAG('n','a','m','e'),
+        OS_2 = TTF_TAG('O','S','/','2'),
+        post = TTF_TAG('p','o','s','t'),
+        prep = TTF_TAG('p','r','e','p')
+    };
+};
+
+/*----------------------------------------------------------------------------------------------
+    Class providing utility methods to parse a TrueType font file (TTF).
+    Callling application handles all file input and memory allocation.
+    Assumes minimal knowledge of TTF file format.
+----------------------------------------------------------------------------------------------*/
+    ////////////////////////////////// tools to find & check TTF tables
+    bool GetHeaderInfo(size_t & lOffset, size_t & lSize);
+    bool CheckHeader(const void * pHdr);
+    bool GetTableDirInfo(const void * pHdr, size_t & lOffset, size_t & lSize);
+    bool GetTableInfo(const Tag TableTag, const void * pHdr, const void * pTableDir,
+        size_t & lOffset, size_t & lSize);
+    bool CheckTable(const Tag TableId, const void * pTable, size_t lTableSize);
+
+    ////////////////////////////////// simple font wide info
+    size_t  GlyphCount(const void * pMaxp);
+#ifdef ALL_TTFUTILS
+    size_t  MaxCompositeComponentCount(const void * pMaxp);
+    size_t  MaxCompositeLevelCount(const void * pMaxp);
+    size_t  LocaGlyphCount(size_t lLocaSize, const void * pHead); // throw (std::domain_error);
+#endif
+    int DesignUnits(const void * pHead);
+#ifdef ALL_TTFUTILS
+    int HeadTableCheckSum(const void * pHead);
+    void HeadTableCreateTime(const void * pHead, unsigned int * pnDateBC, unsigned int * pnDateAD);
+    void HeadTableModifyTime(const void * pHead, unsigned int * pnDateBC, unsigned int * pnDateAD);
+    bool IsItalic(const void * pHead);
+    int FontAscent(const void * pOs2);
+    int FontDescent(const void * pOs2);
+    bool FontOs2Style(const void *pOs2, bool & fBold, bool & fItalic);
+    bool Get31EngFamilyInfo(const void * pName, size_t & lOffset, size_t & lSize);
+    bool Get31EngFullFontInfo(const void * pName, size_t & lOffset, size_t & lSize);
+    bool Get30EngFamilyInfo(const void * pName, size_t & lOffset, size_t & lSize);
+    bool Get30EngFullFontInfo(const void * pName, size_t & lOffset, size_t & lSize);
+    int PostLookup(const void * pPost, size_t lPostSize, const void * pMaxp,
+        const char * pPostName);
+#endif
+
+    ////////////////////////////////// utility methods helpful for name table
+    bool GetNameInfo(const void * pName, int nPlatformId, int nEncodingId,
+        int nLangId, int nNameId, size_t & lOffset, size_t & lSize);
+    //size_t NameTableLength(const byte * pTable);
+#ifdef ALL_TTFUTILS
+    int GetLangsForNames(const void * pName, int nPlatformId, int nEncodingId,
+        int *nameIdList, int cNameIds, short *langIdList);
+    void SwapWString(void * pWStr, size_t nSize = 0); // throw (std::invalid_argument);
+#endif
+
+    ////////////////////////////////// cmap lookup tools
+    const void * FindCmapSubtable(const void * pCmap, int nPlatformId = 3,
+        int nEncodingId = 1, size_t length = 0);
+    bool CheckCmapSubtable4(const void * pCmap31, const void * pCmapEnd /*, unsigned int maxgid*/);
+    gid16 CmapSubtable4Lookup(const void * pCmapSubtabel4, unsigned int nUnicodeId, int rangeKey = 0);
+    unsigned int CmapSubtable4NextCodepoint(const void *pCmap31, unsigned int nUnicodeId,
+        int * pRangeKey = 0);
+    bool CheckCmapSubtable12(const void *pCmap310, const void * pCmapEnd /*, unsigned int maxgid*/);
+    gid16 CmapSubtable12Lookup(const void * pCmap310, unsigned int uUnicodeId, int rangeKey = 0);
+    unsigned int CmapSubtable12NextCodepoint(const void *pCmap310, unsigned int nUnicodeId,
+        int * pRangeKey = 0);
+
+    ///////////////////////////////// horizontal metric data for a glyph
+    bool HorMetrics(gid16 nGlyphId, const void * pHmtx, size_t lHmtxSize,
+        const void * pHhea, int & nLsb, unsigned int & nAdvWid);
+
+    ////////////////////////////////// primitives for loca and glyf lookup
+    size_t LocaLookup(gid16 nGlyphId, const void * pLoca, size_t lLocaSize,
+        const void * pHead); // throw (std::out_of_range);
+    void * GlyfLookup(const void * pGlyf, size_t lGlyfOffset, size_t lTableLen);
+
+    ////////////////////////////////// primitves for simple glyph data
+    bool GlyfBox(const void * pSimpleGlyf, int & xMin, int & yMin,
+        int & xMax, int & yMax);
+
+#ifdef ALL_TTFUTILS
+    int GlyfContourCount(const void * pSimpleGlyf);
+    bool GlyfContourEndPoints(const void * pSimpleGlyf, int * prgnContourEndPoint,
+        int cnPointsTotal, size_t & cnPoints);
+    bool GlyfPoints(const void * pSimpleGlyf, int * prgnX, int * prgnY,
+        char * prgbFlag, int cnPointsTotal, int & cnPoints);
+
+    // primitive to find the glyph ids in a composite glyph
+    bool GetComponentGlyphIds(const void * pSimpleGlyf, int * prgnCompId,
+        size_t cnCompIdTotal, size_t & cnCompId);
+    // primitive to find the placement data for a component in a composite glyph
+    bool GetComponentPlacement(const void * pSimpleGlyf, int nCompId,
+        bool fOffset, int & a, int & b);
+    // primitive to find the transform data for a component in a composite glyph
+    bool GetComponentTransform(const void * pSimpleGlyf, int nCompId,
+        float & flt11, float & flt12, float & flt21, float & flt22, bool & fTransOffset);
+#endif
+
+    ////////////////////////////////// operate on composite or simple glyph (auto glyf lookup)
+    void * GlyfLookup(gid16 nGlyphId, const void * pGlyf, const void * pLoca,
+        size_t lGlyfSize, size_t lLocaSize, const void * pHead); // primitive used by below methods
+
+#ifdef ALL_TTFUTILS
+    // below are primary user methods for handling glyf data
+    bool IsSpace(gid16 nGlyphId, const void * pLoca, size_t lLocaSize, const void * pHead);
+    bool IsDeepComposite(gid16 nGlyphId, const void * pGlyf, const void * pLoca,
+        size_t lGlyfSize, size_t lLocaSize, const void * pHead);
+
+    bool GlyfBox(gid16 nGlyphId, const void * pGlyf, const void * pLoca, size_t lGlyfSize, size_t lLocaSize,
+        const void * pHead, int & xMin, int & yMin, int & xMax, int & yMax);
+    bool GlyfContourCount(gid16 nGlyphId, const void * pGlyf, const void * pLoca,
+        size_t lGlyfSize, size_t lLocaSize, const void *pHead, size_t & cnContours);
+    bool GlyfContourEndPoints(gid16 nGlyphId, const void * pGlyf, const void * pLoca,
+        size_t lGlyfSize, size_t lLocaSize, const void * pHead, int * prgnContourEndPoint, size_t cnPoints);
+    bool GlyfPoints(gid16 nGlyphId, const void * pGlyf, const void * pLoca,
+        size_t lGlyfSize, size_t lLocaSize, const void * pHead, const int * prgnContourEndPoint, size_t cnEndPoints,
+        int * prgnX, int * prgnY, bool * prgfOnCurve, size_t cnPoints);
+
+    // utitily method used by high-level GlyfPoints
+    bool SimplifyFlags(char * prgbFlags, int cnPoints);
+    bool CalcAbsolutePoints(int * prgnX, int * prgnY, int cnPoints);
+#endif
+
+} // end of namespace TtfUtil
+} // end of namespace graphite2