418 lines
12 KiB
C
418 lines
12 KiB
C
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/****************************************************************************
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*
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* cfftypes.h
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*
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* Basic OpenType/CFF type definitions and interface (specification
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* only).
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*
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* Copyright (C) 1996-2020 by
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* David Turner, Robert Wilhelm, and Werner Lemberg.
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*
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* This file is part of the FreeType project, and may only be used,
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* modified, and distributed under the terms of the FreeType project
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* license, LICENSE.TXT. By continuing to use, modify, or distribute
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* this file you indicate that you have read the license and
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* understand and accept it fully.
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*
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*/
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#ifndef CFFTYPES_H_
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#define CFFTYPES_H_
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_TYPE1_TABLES_H
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#include FT_INTERNAL_SERVICE_H
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#include FT_SERVICE_POSTSCRIPT_CMAPS_H
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#include FT_INTERNAL_POSTSCRIPT_HINTS_H
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#include FT_INTERNAL_TYPE1_TYPES_H
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FT_BEGIN_HEADER
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/**************************************************************************
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*
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* @struct:
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* CFF_IndexRec
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*
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* @description:
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* A structure used to model a CFF Index table.
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*
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* @fields:
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* stream ::
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* The source input stream.
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*
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* start ::
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* The position of the first index byte in the input stream.
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*
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* count ::
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* The number of elements in the index.
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*
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* off_size ::
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* The size in bytes of object offsets in index.
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*
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* data_offset ::
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* The position of first data byte in the index's bytes.
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*
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* data_size ::
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* The size of the data table in this index.
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*
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* offsets ::
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* A table of element offsets in the index. Must be loaded explicitly.
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*
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* bytes ::
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* If the index is loaded in memory, its bytes.
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*/
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typedef struct CFF_IndexRec_
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{
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FT_Stream stream;
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FT_ULong start;
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FT_UInt hdr_size;
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FT_UInt count;
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FT_Byte off_size;
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FT_ULong data_offset;
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FT_ULong data_size;
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FT_ULong* offsets;
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FT_Byte* bytes;
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} CFF_IndexRec, *CFF_Index;
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typedef struct CFF_EncodingRec_
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{
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FT_UInt format;
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FT_ULong offset;
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FT_UInt count;
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FT_UShort sids [256]; /* avoid dynamic allocations */
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FT_UShort codes[256];
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} CFF_EncodingRec, *CFF_Encoding;
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typedef struct CFF_CharsetRec_
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{
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FT_UInt format;
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FT_ULong offset;
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FT_UShort* sids;
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FT_UShort* cids; /* the inverse mapping of `sids'; only needed */
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/* for CID-keyed fonts */
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FT_UInt max_cid;
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FT_UInt num_glyphs;
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} CFF_CharsetRec, *CFF_Charset;
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/* cf. similar fields in file `ttgxvar.h' from the `truetype' module */
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typedef struct CFF_VarData_
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{
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#if 0
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FT_UInt itemCount; /* not used; always zero */
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FT_UInt shortDeltaCount; /* not used; always zero */
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#endif
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FT_UInt regionIdxCount; /* number of region indexes */
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FT_UInt* regionIndices; /* array of `regionIdxCount' indices; */
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/* these index `varRegionList' */
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} CFF_VarData;
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/* contribution of one axis to a region */
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typedef struct CFF_AxisCoords_
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{
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FT_Fixed startCoord;
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FT_Fixed peakCoord; /* zero peak means no effect (factor = 1) */
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FT_Fixed endCoord;
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} CFF_AxisCoords;
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typedef struct CFF_VarRegion_
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{
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CFF_AxisCoords* axisList; /* array of axisCount records */
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} CFF_VarRegion;
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typedef struct CFF_VStoreRec_
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{
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FT_UInt dataCount;
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CFF_VarData* varData; /* array of dataCount records */
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/* vsindex indexes this array */
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FT_UShort axisCount;
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FT_UInt regionCount; /* total number of regions defined */
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CFF_VarRegion* varRegionList;
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} CFF_VStoreRec, *CFF_VStore;
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/* forward reference */
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typedef struct CFF_FontRec_* CFF_Font;
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/* This object manages one cached blend vector. */
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/* */
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/* There is a BlendRec for Private DICT parsing in each subfont */
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/* and a BlendRec for charstrings in CF2_Font instance data. */
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/* A cached BV may be used across DICTs or Charstrings if inputs */
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/* have not changed. */
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/* */
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/* `usedBV' is reset at the start of each parse or charstring. */
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/* vsindex cannot be changed after a BV is used. */
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/* */
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/* Note: NDV is long (32/64 bit), while BV is 16.16 (FT_Int32). */
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typedef struct CFF_BlendRec_
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{
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FT_Bool builtBV; /* blendV has been built */
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FT_Bool usedBV; /* blendV has been used */
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CFF_Font font; /* top level font struct */
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FT_UInt lastVsindex; /* last vsindex used */
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FT_UInt lenNDV; /* normDV length (aka numAxes) */
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FT_Fixed* lastNDV; /* last NDV used */
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FT_UInt lenBV; /* BlendV length (aka numMasters) */
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FT_Int32* BV; /* current blendV (per DICT/glyph) */
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} CFF_BlendRec, *CFF_Blend;
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typedef struct CFF_FontRecDictRec_
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{
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FT_UInt version;
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FT_UInt notice;
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FT_UInt copyright;
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FT_UInt full_name;
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FT_UInt family_name;
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FT_UInt weight;
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FT_Bool is_fixed_pitch;
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FT_Fixed italic_angle;
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FT_Fixed underline_position;
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FT_Fixed underline_thickness;
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FT_Int paint_type;
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FT_Int charstring_type;
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FT_Matrix font_matrix;
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FT_Bool has_font_matrix;
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FT_ULong units_per_em; /* temporarily used as scaling value also */
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FT_Vector font_offset;
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FT_ULong unique_id;
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FT_BBox font_bbox;
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FT_Pos stroke_width;
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FT_ULong charset_offset;
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FT_ULong encoding_offset;
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FT_ULong charstrings_offset;
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FT_ULong private_offset;
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FT_ULong private_size;
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FT_Long synthetic_base;
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FT_UInt embedded_postscript;
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/* these should only be used for the top-level font dictionary */
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FT_UInt cid_registry;
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FT_UInt cid_ordering;
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FT_Long cid_supplement;
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FT_Long cid_font_version;
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FT_Long cid_font_revision;
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FT_Long cid_font_type;
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FT_ULong cid_count;
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FT_ULong cid_uid_base;
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FT_ULong cid_fd_array_offset;
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FT_ULong cid_fd_select_offset;
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FT_UInt cid_font_name;
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/* the next fields come from the data of the deprecated */
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/* `MultipleMaster' operator; they are needed to parse the (also */
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/* deprecated) `blend' operator in Type 2 charstrings */
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FT_UShort num_designs;
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FT_UShort num_axes;
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/* fields for CFF2 */
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FT_ULong vstore_offset;
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FT_UInt maxstack;
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} CFF_FontRecDictRec, *CFF_FontRecDict;
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/* forward reference */
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typedef struct CFF_SubFontRec_* CFF_SubFont;
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typedef struct CFF_PrivateRec_
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{
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FT_Byte num_blue_values;
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FT_Byte num_other_blues;
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FT_Byte num_family_blues;
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FT_Byte num_family_other_blues;
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FT_Pos blue_values[14];
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FT_Pos other_blues[10];
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FT_Pos family_blues[14];
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FT_Pos family_other_blues[10];
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FT_Fixed blue_scale;
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FT_Pos blue_shift;
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FT_Pos blue_fuzz;
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FT_Pos standard_width;
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FT_Pos standard_height;
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FT_Byte num_snap_widths;
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FT_Byte num_snap_heights;
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FT_Pos snap_widths[13];
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FT_Pos snap_heights[13];
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FT_Bool force_bold;
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FT_Fixed force_bold_threshold;
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FT_Int lenIV;
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FT_Int language_group;
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FT_Fixed expansion_factor;
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FT_Long initial_random_seed;
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FT_ULong local_subrs_offset;
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FT_Pos default_width;
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FT_Pos nominal_width;
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/* fields for CFF2 */
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FT_UInt vsindex;
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CFF_SubFont subfont;
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} CFF_PrivateRec, *CFF_Private;
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typedef struct CFF_FDSelectRec_
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{
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FT_Byte format;
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FT_UInt range_count;
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/* that's the table, taken from the file `as is' */
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FT_Byte* data;
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FT_UInt data_size;
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/* small cache for format 3 only */
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FT_UInt cache_first;
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FT_UInt cache_count;
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FT_Byte cache_fd;
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} CFF_FDSelectRec, *CFF_FDSelect;
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/* A SubFont packs a font dict and a private dict together. They are */
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/* needed to support CID-keyed CFF fonts. */
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typedef struct CFF_SubFontRec_
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{
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CFF_FontRecDictRec font_dict;
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CFF_PrivateRec private_dict;
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/* fields for CFF2 */
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CFF_BlendRec blend; /* current blend vector */
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FT_UInt lenNDV; /* current length NDV or zero */
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FT_Fixed* NDV; /* ptr to current NDV or NULL */
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/* `blend_stack' is a writable buffer to hold blend results. */
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/* This buffer is to the side of the normal cff parser stack; */
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/* `cff_parse_blend' and `cff_blend_doBlend' push blend results here. */
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/* The normal stack then points to these values instead of the DICT */
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/* because all other operators in Private DICT clear the stack. */
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/* `blend_stack' could be cleared at each operator other than blend. */
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/* Blended values are stored as 5-byte fixed point values. */
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FT_Byte* blend_stack; /* base of stack allocation */
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FT_Byte* blend_top; /* first empty slot */
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FT_UInt blend_used; /* number of bytes in use */
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FT_UInt blend_alloc; /* number of bytes allocated */
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CFF_IndexRec local_subrs_index;
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FT_Byte** local_subrs; /* array of pointers */
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/* into Local Subrs INDEX data */
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FT_UInt32 random;
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} CFF_SubFontRec;
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#define CFF_MAX_CID_FONTS 256
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typedef struct CFF_FontRec_
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{
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FT_Library library;
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FT_Stream stream;
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FT_Memory memory; /* TODO: take this from stream->memory? */
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FT_ULong base_offset; /* offset to start of CFF */
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FT_UInt num_faces;
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FT_UInt num_glyphs;
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FT_Byte version_major;
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FT_Byte version_minor;
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FT_Byte header_size;
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FT_UInt top_dict_length; /* cff2 only */
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FT_Bool cff2;
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CFF_IndexRec name_index;
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CFF_IndexRec top_dict_index;
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CFF_IndexRec global_subrs_index;
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CFF_EncodingRec encoding;
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CFF_CharsetRec charset;
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CFF_IndexRec charstrings_index;
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CFF_IndexRec font_dict_index;
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CFF_IndexRec private_index;
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CFF_IndexRec local_subrs_index;
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FT_String* font_name;
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/* array of pointers into Global Subrs INDEX data */
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FT_Byte** global_subrs;
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/* array of pointers into String INDEX data stored at string_pool */
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FT_UInt num_strings;
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FT_Byte** strings;
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FT_Byte* string_pool;
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FT_ULong string_pool_size;
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CFF_SubFontRec top_font;
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FT_UInt num_subfonts;
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CFF_SubFont subfonts[CFF_MAX_CID_FONTS];
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CFF_FDSelectRec fd_select;
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/* interface to PostScript hinter */
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PSHinter_Service pshinter;
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/* interface to Postscript Names service */
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FT_Service_PsCMaps psnames;
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/* interface to CFFLoad service */
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const void* cffload;
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/* since version 2.3.0 */
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PS_FontInfoRec* font_info; /* font info dictionary */
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/* since version 2.3.6 */
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FT_String* registry;
|
||
|
|
FT_String* ordering;
|
||
|
|
|
||
|
|
/* since version 2.4.12 */
|
||
|
|
FT_Generic cf2_instance;
|
||
|
|
|
||
|
|
/* since version 2.7.1 */
|
||
|
|
CFF_VStoreRec vstore; /* parsed vstore structure */
|
||
|
|
|
||
|
|
/* since version 2.9 */
|
||
|
|
PS_FontExtraRec* font_extra;
|
||
|
|
|
||
|
|
} CFF_FontRec;
|
||
|
|
|
||
|
|
|
||
|
|
FT_END_HEADER
|
||
|
|
|
||
|
|
#endif /* CFFTYPES_H_ */
|
||
|
|
|
||
|
|
|
||
|
|
/* END */
|