diff options
Diffstat (limited to 'src/pdflib/font/ft_truetype.h')
| -rw-r--r-- | src/pdflib/font/ft_truetype.h | 558 |
1 files changed, 558 insertions, 0 deletions
diff --git a/src/pdflib/font/ft_truetype.h b/src/pdflib/font/ft_truetype.h new file mode 100644 index 0000000..89cd3fb --- /dev/null +++ b/src/pdflib/font/ft_truetype.h @@ -0,0 +1,558 @@ +/*---------------------------------------------------------------------------* + | PDFlib - A library for generating PDF on the fly | + +---------------------------------------------------------------------------+ + | Copyright (c) 1997-2006 Thomas Merz and PDFlib GmbH. All rights reserved. | + +---------------------------------------------------------------------------+ + | | + | This software is subject to the PDFlib license. It is NOT in the | + | public domain. Extended versions and commercial licenses are | + | available, please check http://www.pdflib.com. | + | | + *---------------------------------------------------------------------------*/ + +/* $Id: ft_truetype.h,v 1.1 2008/10/17 06:10:43 scuri Exp $ + * + * FONT TrueType typedefs, structures, and enums + * + */ + +#ifndef FT_TRUETYPE_H +#define FT_TRUETYPE_H + +typedef unsigned char tt_byte; +typedef char tt_char; +typedef unsigned short tt_ushort; +typedef short tt_short; +typedef unsigned int tt_ulong; +typedef int tt_long; + +typedef long tt_fixed; +typedef short tt_fword; +typedef unsigned short tt_ufword; + +#define tt_get_fixed tt_get_long +#define tt_get_fword tt_get_short +#define tt_get_ufword tt_get_ushort + +#define TT_XKERNPAIR_CHUNKSIZE 256 +#define TT_ACCGIDTAB_CHUNKSIZE 256 + +#define TT_OPERAND_STACKSIZE 48 + +#define TT_NUMSTDSTRINGS 391 +#define TT_NUMISOSTRINGS 229 +#define TT_NUMEXPSTRINGS 379 +#define TT_NUMEXPERTGIDS 166 + +#define TT_OFFSETTAB_SIZE 12 + +/* flags for fnt_set_tt_fontarrays */ +#define TT_FONT_encvec (1<<0) +#define TT_FONT_gid2code (1<<1) +#define TT_FONT_code2gid (1<<2) +#define TT_FONT_gid2name (1<<3) +#define TT_FONT_m_ciw (1<<4) +#define TT_FONT_m_widths (1<<5) +#define TT_FONT_names (1<<6) +#define TT_FONT_name2unitab (1<<7) + +typedef enum +{ + cff_version = 0, + cff_Notice = 1, + cff_FullName = 2, + cff_FamilyName = 3, + cff_Weight = 4, + cff_FontBBox = 5, + cff_BlueValues = 6, + cff_OtherBlues = 7, + cff_FamilyBlues = 8, + cff_FamilyOtherBlues = 9, + cff_StdHW = 10, + cff_StdVW = 11, + cff_Copyright = 0x100, /* 12 0 */ + cff_isFixedPitch = 0x101, /* 12 1 */ + cff_ItalicAngle = 0x102, /* 12 2 */ + cff_UnderlinePosition = 0x103, /* 12 3 */ + cff_UnderlineThickness = 0x104, /* 12 4 */ + cff_PaintType = 0x105, /* 12 5 */ + cff_CharstringType = 0x106, /* 12 6 */ + cff_FontMatrix = 0x107, /* 12 7 */ + cff_StrokeWidth = 0x108, /* 12 8 */ + cff_BlueScale = 0x109, /* 12 9 */ + cff_BlueShift = 0x10A, /* 12 10 */ + cff_BlueFuzz = 0x10B, /* 12 11 */ + cff_StemSnapH = 0x10C, /* 12 12 */ + cff_StemSnapV = 0x10D, /* 12 13 */ + cff_ForceBold = 0x10E, /* 12 14 */ + /* 0x10F, 12 15 */ + /* 0x110, 12 16 */ + cff_LanguageGroup = 0x111, /* 12 17 */ + cff_ExpansionFactor = 0x112, /* 12 18 */ + cff_initialRandomSeed = 0x113, /* 12 19 */ + cff_SyntheticBase = 0x114, /* 12 20 */ + cff_PostScript = 0x115, /* 12 21 */ + cff_BaseFontName = 0x116, /* 12 22 */ + cff_BaseFontBlend = 0x117, /* 12 23 */ + /* 0x118, 12 24 */ + /* 0x119, 12 25 */ + /* 0x11A, 12 26 */ + /* 0x11B, 12 27 */ + /* 0x11C, 12 28 */ + /* 0x11D, 12 29 */ + cff_ROS = 0x11E, /* 12 30 */ + cff_CIDFontVersion = 0x11F, /* 12 31 */ + cff_CIDFontRevision = 0x120, /* 12 32 */ + cff_CIDFontType = 0x121, /* 12 33 */ + cff_CIDCount = 0x122, /* 12 34 */ + cff_UIDBase = 0x123, /* 12 35 */ + cff_FDArray = 0x124, /* 12 36 */ + cff_FDSelect = 0x125, /* 12 37 */ + cff_FontName = 0x126, /* 12 38 */ + /* 0x127, 12 39 */ + cff_UniqueID = 13, + cff_XUID = 14, + cff_Charsets = 15, + cff_Encoding = 16, + cff_CharStrings = 17, + cff_Private = 18, + cff_Subrs = 19, + cff_defaultWidthX = 20, + cff_nominalWidthX = 21 +} +tt_cff_oper; + +typedef struct +{ + char tag[5]; + tt_ulong checksum; + tt_ulong offset; + tt_ulong length; +} tt_dirent; + +typedef enum +{ + tt_pfid_uni = 0, + tt_pfid_mac = 1, + tt_pfid_iso = 2, + tt_pfid_win = 3, + tt_pfid_custom = 4 +} tt_platform_id; + +typedef enum +{ + tt_wenc_symbol = 0, + tt_wenc_text = 1, + tt_wenc_mtext = 3, + tt_wenc_utext = 10 +} tt_win_encoding_id; + +/* format 4 cmap table: +*/ +typedef struct +{ + tt_ushort encodingID; + tt_ushort format; + tt_ushort length; + tt_ushort version; + tt_ushort segCountX2; /* segCount * 2 */ + tt_ushort searchRange; + tt_ushort entrySelector; + tt_ushort rangeShift; + tt_ushort * endCount; /* [segCount] */ + tt_ushort * startCount; /* [segCount] */ + tt_short * idDelta; /* [segCount] */ + tt_ushort * idRangeOffs; /* [segCount] */ + int numGlyphIds; + tt_ushort * glyphIdArray; +} tt_cmap4; + +/* combined data structure for format 0 and format 6 encoding tables: +*/ +typedef struct +{ + tt_ushort format; + tt_ushort length; + tt_ushort language; + tt_ushort firstCode; + tt_ushort entryCount; + tt_ushort *glyphIdArray; +} tt_cmap0_6; + +/* format 12 cmap table: +*/ +typedef struct +{ + tt_ulong startCharCode; + tt_ulong endCharCode; + tt_ulong startGlyphID; +} tt_grouptab; + +typedef struct +{ + tt_ushort format; + tt_ulong length; + tt_ulong language; + tt_ulong nGroups; + tt_grouptab *grouptab; /* [nGroups] */ +} tt_cmap12; + +typedef struct +{ + tt_ushort version; + tt_ushort numEncTabs; + + tt_cmap4 *win; + tt_cmap0_6 *mac; + tt_cmap12 *ucs4; + + /* picked table */ + tt_ushort platform; + tt_ushort encoding; + tt_ushort format; + tt_ulong offset; + tt_ulong length; +} tt_tab_cmap; + +typedef struct +{ + tt_fixed version; + tt_fixed fontRevision; + tt_ulong checkSumAdjustment; + tt_ulong magicNumber; + tt_ushort flags; + tt_ushort unitsPerEm; + tt_ulong created[2]; + tt_ulong modified[2]; + tt_fword xMin, yMin; + tt_fword xMax, yMax; + tt_ushort macStyle; + tt_ushort lowestRecPPEM; + tt_short fontDirectionHint; + tt_short indexToLocFormat; + tt_short glyphDataFormat; +} tt_tab_head; + +typedef struct +{ + tt_fixed version; + tt_fword ascender; + tt_fword descender; + tt_fword lineGap; + tt_fword advanceWidthMax; /* specification: tt_ufword */ + tt_fword minLeftSideBearing; + tt_fword minRightSideBearing; + tt_fword xMaxExtent; + tt_short caretSlopeRise; + tt_short caretSlopeRun; + tt_short res1; + tt_short res2; + tt_short res3; + tt_short res4; + tt_short res5; + tt_short metricDataFormat; + tt_ushort numberOfHMetrics; +} tt_tab_hhea; + +typedef struct +{ + tt_fword advanceWidth; /* specification: tt_ufword */ + tt_fword lsb; +} tt_metric; + +typedef struct +{ + tt_metric * metrics; + tt_fword * lsbs; +} tt_tab_hmtx; + +typedef struct +{ + tt_fixed version; + tt_ushort numGlyphs; + tt_ushort maxPoints; + tt_ushort maxContours; + tt_ushort maxCompositePoints; + tt_ushort maxCompositeContours; + tt_ushort maxZones; + tt_ushort maxTwilightPoints; + tt_ushort maxStorage; + tt_ushort maxFunctionDefs; + tt_ushort maxInstructionDefs; + tt_ushort maxStackElements; + tt_ushort maxSizeOfInstructions; + tt_ushort maxComponentElements; + tt_ushort maxComponentDepth; +} tt_tab_maxp; + +typedef struct +{ + tt_ushort platform; + tt_ushort encoding; + tt_ushort language; + tt_ushort namid; + tt_ushort length; + tt_ushort offset; +} tt_nameref; + +typedef struct +{ + tt_ushort format; + tt_ushort numNameRecords; + tt_ushort offsetStrings; + tt_nameref *namerecords; + char *englishname4; + char *englishname6; + char *producer; +} tt_tab_name; + +typedef struct +{ + tt_ushort version; + tt_short xAvgCharWidth; + tt_ushort usWeightClass; + tt_ushort usWidthClass; + tt_ushort fsType; /* tt_short? */ + tt_short ySubscriptXSize; + tt_short ySubscriptYSize; + tt_short ySubscriptXOffset; + tt_short ySubscriptYOffset; + tt_short ySuperscriptXSize; + tt_short ySuperscriptYSize; + tt_short ySuperscriptXOffset; + tt_short ySuperscriptYOffset; + tt_short yStrikeoutSize; + tt_short yStrikeoutPosition; + tt_ushort sFamilyClass; /* tt_short? */ + tt_byte panose[10]; + tt_ulong ulUnicodeRange1; + tt_ulong ulUnicodeRange2; + tt_ulong ulUnicodeRange3; + tt_ulong ulUnicodeRange4; + tt_char achVendID[4]; + tt_ushort fsSelection; + tt_ushort usFirstCharIndex; + tt_ushort usLastCharIndex; + + /* tt_ushort according to spec; obviously a spec bug. + */ + tt_short sTypoAscender; + tt_short sTypoDescender; + tt_short sTypoLineGap; + + tt_ushort usWinAscent; + tt_ushort usWinDescent; + + /* if version >= 1 + */ + tt_ulong ulCodePageRange1; + tt_ulong ulCodePageRange2; + + /* if version >= 2 (according to OpenType spec) + */ + tt_short sxHeight; + tt_short sCapHeight; + tt_ushort usDefaultChar; + tt_ushort usBreakChar; + tt_ushort usMaxContext; + + int charcolls[PDC_NUMCHARCOLL]; +} tt_tab_OS_2; + + +typedef struct +{ + tt_ulong offset; + tt_ulong length; +} +tt_tab_CFF_; + +typedef struct +{ + tt_fixed formatType; + double italicAngle; + tt_fword underlinePosition; + tt_fword underlineThickness; + tt_ulong isFixedPitch; + tt_ulong minMemType42; + tt_ulong maxMemType42; + tt_ulong minMemType1; + tt_ulong maxMemType1; + tt_ushort numberOfGlyphs; +} tt_tab_post; + +typedef struct +{ + tt_ushort start; + tt_ushort end; + tt_ushort cclass; +} tt_record_classrange; + +typedef struct +{ + tt_ushort left; + tt_ushort right; + tt_short value; + tt_short dominant; +} tt_xkern_pair; + +typedef struct +{ + tt_xkern_pair *pairs; + int capacity; + int number; +} tt_xkern_pair_list; + +typedef struct +{ + /* -------------------- input members -------------------- */ + + pdc_core *pdc; + fnt_font *font; /* corresponding font struct */ + + const char *filename; /* font file name */ + const char *fontname; /* font API name */ + + pdc_bool verbose; /* put warnings */ + pdc_bool fortet; /* for TET */ + + pdc_bool check; /* check for fontname */ + pdc_bool incore; /* whole font in-core */ + pdc_bool savecff; /* save results of CFF analyzing */ + int monospace; /* monospace amount */ + + tt_byte *img; /* in-core TT font file image */ + tt_byte *end; /* first byte above image buf */ + tt_byte *pos; /* current "file" position */ + pdc_file *fp; + + + /* ----------------- results from parsing ------------------- */ + + int n_tables; + tt_ulong offset; + tt_dirent * dir; + + /* table structs: */ + tt_tab_cmap *tab_cmap; + tt_tab_head *tab_head; + tt_tab_hhea *tab_hhea; + tt_tab_hmtx *tab_hmtx; + tt_tab_maxp *tab_maxp; + tt_tab_name *tab_name; + tt_tab_post *tab_post; + tt_tab_OS_2 *tab_OS_2; + tt_tab_CFF_ *tab_CFF_; + + + int numGlyphs; /* number of glyphs */ + int onlyCFF; /* only CFF_ table */ + int hasGlyphNames; /* CFF: has glyph names */ + int numunicode; /* number of Unicode values incl. 0 */ + int builtinenc; /* builtin encoding */ + pdc_bool regisadobe; /* registry is Adobe */ + int charcoll; /* character collection */ + int supplement; /* supplement number */ + + pdc_bool issymbol; /* symbol font */ + pdc_bool haswinuni; /* has a "Microsoft standard character + * to glyph index mapping table" + * cmap (3, 1) format 4 or + * cmap (3,10) format 12 or + * cmap (0, 3) format 4 (mac old case) */ + pdc_bool hasonlymac; /* has only macroman cmap (0,1) */ + + char *utf16fontname; /* UTF-16-BE font name for TTC fonts */ + int fnamelen; /* font name length */ + + +} tt_file; + +/* TrueType table names, defined as octal codes */ +#define fnt_str_ttcf "\164\164\143\146" +#define fnt_str_bhed "\142\150\145\144" +#define fnt_str_CFF_ "\103\106\106\040" +#define fnt_str_cvt_ "\143\166\164\040" +#define fnt_str_cmap "\143\155\141\160" +#define fnt_str_fpgm "\146\160\147\155" +#define fnt_str_glyf "\147\154\171\146" +#define fnt_str_GPOS "\107\120\117\123" +#define fnt_str_GSUB "\107\123\125\102" +#define fnt_str_head "\150\145\141\144" +#define fnt_str_hhea "\150\150\145\141" +#define fnt_str_hmtx "\150\155\164\170" +#define fnt_str_kern "\153\145\162\156" +#define fnt_str_loca "\154\157\143\141" +#define fnt_str_maxp "\155\141\170\160" +#define fnt_str_name "\156\141\155\145" +#define fnt_str_OS_2 "\117\123\057\062" /* OS/2 */ +#define fnt_str_post "\160\157\163\164" +#define fnt_str_prep "\160\162\145\160" + +#define fnt_str_vert "\166\145\162\164" + +/* Composite font flags. */ +/* See Reference of OpenType: glyf - Glyf Data */ +#define ARGS_ARE_WORDS 0x001 +#define ARGS_ARE_XY_VALUES 0x002 +#define ROUND_XY_TO_GRID 0x004 +#define WE_HAVE_A_SCALE 0x008 +/* reserved 0x010 */ +#define MORE_COMPONENTS 0x020 +#define WE_HAVE_AN_XY_SCALE 0x040 +#define WE_HAVE_A_2X2 0x080 +#define WE_HAVE_INSTR 0x100 +#define USE_MY_METRICS 0x200 + + +/* Functions */ + +#define FNT_TT2PDF(v) (int) PDC_ROUND(v * 1000.0 / ttf->tab_head->unitsPerEm) + +#define TT_ASSERT(ttf, cond) \ + ((cond) ? (void) 0 : tt_assert(ttf)) + +#define TT_IOCHECK(ttf, cond) \ + ((cond) ? (void) 0 : tt_error(ttf)) + +int tt_tag2idx(tt_file *ttf, char *tag); +void *tt_get_tab(tt_file *ttf, char *tag, size_t nbytes, pdc_bool tterror, + tt_ulong *offset); +void tt_get_tab_maxp(tt_file *ttf); +void tt_get_tab_head(tt_file *ttf); +void tt_get_tab_cmap(tt_file *ttf); +pdc_bool tt_get_tab_CFF_(tt_file *ttf); +void tt_get_tab_OS_2(tt_file *ttf); + +void tt_assert(tt_file *ttf); +void tt_error(tt_file *ttf); +void tt_seek(tt_file *ttf, long offset); +void tt_read(tt_file *ttf, void *buf, unsigned int nbytes); +long tt_tell(tt_file *ttf); +tt_ushort tt_get_ushort(tt_file *ttf); +tt_short tt_get_short(tt_file *ttf); +tt_ulong tt_get_ulong3(tt_file *ttf); +tt_ulong tt_get_ulong(tt_file *ttf); +tt_long tt_get_long(tt_file *ttf); +tt_ulong tt_get_offset(tt_file *ttf, tt_byte offsize); +pdc_bool tt_get_tab_name(tt_file *ttf); + +int tt_unicode2gidx(tt_file *ttf, int usv, pdc_bool logg); +int tt_gidx2width(tt_file *ttf, int gidx); + + +tt_file *fnt_new_tt(pdc_core *pdc, fnt_font *font); +void fnt_delete_tt(tt_file *ttf); +void fnt_set_tt_fontvalues(tt_file *ttf); +int fnt_set_tt_fontarrays(tt_file *ttf, int flags); +pdc_encoding fnt_get_tt_encoding_key(tt_file *ttf, pdc_encoding inenc); +pdc_bool fnt_read_tt(tt_file *ttf); +pdc_bool fnt_read_offset_tab(tt_file *ttf); +pdc_bool fnt_test_tt_font(pdc_core *pdc, tt_byte *img, tt_ulong *n_fonts, + pdc_bool requested); +pdc_bool fnt_is_opentype_font(tt_file *ttf); +pdc_bool fnt_check_tt_font(pdc_core *pdc, const char *filename, + const char *fontname, fnt_font *font, pdc_bool requested); + + +#endif /* FT_TRUETYPE_H */ |