/***************************************************************************/ | |
/* */ | |
/* cffgload.h */ | |
/* */ | |
/* OpenType Glyph Loader (specification). */ | |
/* */ | |
/* Copyright 1996-2015 by */ | |
/* David Turner, Robert Wilhelm, and Werner Lemberg. */ | |
/* */ | |
/* This file is part of the FreeType project, and may only be used, */ | |
/* modified, and distributed under the terms of the FreeType project */ | |
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ | |
/* this file you indicate that you have read the license and */ | |
/* understand and accept it fully. */ | |
/* */ | |
/***************************************************************************/ | |
#ifndef __CFFGLOAD_H__ | |
#define __CFFGLOAD_H__ | |
#include <ft2build.h> | |
#include FT_FREETYPE_H | |
#include "cffobjs.h" | |
FT_BEGIN_HEADER | |
#define CFF_MAX_OPERANDS 48 | |
#define CFF_MAX_SUBRS_CALLS 16 /* maximum subroutine nesting; */ | |
/* only 10 are allowed but there exist */ | |
/* fonts like `HiraKakuProN-W3.ttf' */ | |
/* (Hiragino Kaku Gothic ProN W3; */ | |
/* 8.2d6e1; 2014-12-19) that exceed */ | |
/* this limit */ | |
#define CFF_MAX_TRANS_ELEMENTS 32 | |
/*************************************************************************/ | |
/* */ | |
/* <Structure> */ | |
/* CFF_Builder */ | |
/* */ | |
/* <Description> */ | |
/* A structure used during glyph loading to store its outline. */ | |
/* */ | |
/* <Fields> */ | |
/* memory :: The current memory object. */ | |
/* */ | |
/* face :: The current face object. */ | |
/* */ | |
/* glyph :: The current glyph slot. */ | |
/* */ | |
/* loader :: The current glyph loader. */ | |
/* */ | |
/* base :: The base glyph outline. */ | |
/* */ | |
/* current :: The current glyph outline. */ | |
/* */ | |
/* pos_x :: The horizontal translation (if composite glyph). */ | |
/* */ | |
/* pos_y :: The vertical translation (if composite glyph). */ | |
/* */ | |
/* left_bearing :: The left side bearing point. */ | |
/* */ | |
/* advance :: The horizontal advance vector. */ | |
/* */ | |
/* bbox :: Unused. */ | |
/* */ | |
/* path_begun :: A flag which indicates that a new path has begun. */ | |
/* */ | |
/* load_points :: If this flag is not set, no points are loaded. */ | |
/* */ | |
/* no_recurse :: Set but not used. */ | |
/* */ | |
/* metrics_only :: A boolean indicating that we only want to compute */ | |
/* the metrics of a given glyph, not load all of its */ | |
/* points. */ | |
/* */ | |
/* hints_funcs :: Auxiliary pointer for hinting. */ | |
/* */ | |
/* hints_globals :: Auxiliary pointer for hinting. */ | |
/* */ | |
typedef struct CFF_Builder_ | |
{ | |
FT_Memory memory; | |
TT_Face face; | |
CFF_GlyphSlot glyph; | |
FT_GlyphLoader loader; | |
FT_Outline* base; | |
FT_Outline* current; | |
FT_Pos pos_x; | |
FT_Pos pos_y; | |
FT_Vector left_bearing; | |
FT_Vector advance; | |
FT_BBox bbox; /* bounding box */ | |
FT_Bool path_begun; | |
FT_Bool load_points; | |
FT_Bool no_recurse; | |
FT_Bool metrics_only; | |
void* hints_funcs; /* hinter-specific */ | |
void* hints_globals; /* hinter-specific */ | |
} CFF_Builder; | |
FT_LOCAL( FT_Error ) | |
cff_check_points( CFF_Builder* builder, | |
FT_Int count ); | |
FT_LOCAL( void ) | |
cff_builder_add_point( CFF_Builder* builder, | |
FT_Pos x, | |
FT_Pos y, | |
FT_Byte flag ); | |
FT_LOCAL( FT_Error ) | |
cff_builder_add_point1( CFF_Builder* builder, | |
FT_Pos x, | |
FT_Pos y ); | |
FT_LOCAL( FT_Error ) | |
cff_builder_start_point( CFF_Builder* builder, | |
FT_Pos x, | |
FT_Pos y ); | |
FT_LOCAL( void ) | |
cff_builder_close_contour( CFF_Builder* builder ); | |
FT_LOCAL( FT_Int ) | |
cff_lookup_glyph_by_stdcharcode( CFF_Font cff, | |
FT_Int charcode ); | |
FT_LOCAL( FT_Error ) | |
cff_get_glyph_data( TT_Face face, | |
FT_UInt glyph_index, | |
FT_Byte** pointer, | |
FT_ULong* length ); | |
FT_LOCAL( void ) | |
cff_free_glyph_data( TT_Face face, | |
FT_Byte** pointer, | |
FT_ULong length ); | |
/* execution context charstring zone */ | |
typedef struct CFF_Decoder_Zone_ | |
{ | |
FT_Byte* base; | |
FT_Byte* limit; | |
FT_Byte* cursor; | |
} CFF_Decoder_Zone; | |
typedef struct CFF_Decoder_ | |
{ | |
CFF_Builder builder; | |
CFF_Font cff; | |
FT_Fixed stack[CFF_MAX_OPERANDS + 1]; | |
FT_Fixed* top; | |
CFF_Decoder_Zone zones[CFF_MAX_SUBRS_CALLS + 1]; | |
CFF_Decoder_Zone* zone; | |
FT_Int flex_state; | |
FT_Int num_flex_vectors; | |
FT_Vector flex_vectors[7]; | |
FT_Pos glyph_width; | |
FT_Pos nominal_width; | |
FT_Bool read_width; | |
FT_Bool width_only; | |
FT_Int num_hints; | |
FT_Fixed buildchar[CFF_MAX_TRANS_ELEMENTS]; | |
FT_UInt num_locals; | |
FT_UInt num_globals; | |
FT_Int locals_bias; | |
FT_Int globals_bias; | |
FT_Byte** locals; | |
FT_Byte** globals; | |
FT_Byte** glyph_names; /* for pure CFF fonts only */ | |
FT_UInt num_glyphs; /* number of glyphs in font */ | |
FT_Render_Mode hint_mode; | |
FT_Bool seac; | |
CFF_SubFont current_subfont; /* for current glyph_index */ | |
} CFF_Decoder; | |
FT_LOCAL( void ) | |
cff_decoder_init( CFF_Decoder* decoder, | |
TT_Face face, | |
CFF_Size size, | |
CFF_GlyphSlot slot, | |
FT_Bool hinting, | |
FT_Render_Mode hint_mode ); | |
FT_LOCAL( FT_Error ) | |
cff_decoder_prepare( CFF_Decoder* decoder, | |
CFF_Size size, | |
FT_UInt glyph_index ); | |
#if 0 /* unused until we support pure CFF fonts */ | |
/* Compute the maximum advance width of a font through quick parsing */ | |
FT_LOCAL( FT_Error ) | |
cff_compute_max_advance( TT_Face face, | |
FT_Int* max_advance ); | |
#endif /* 0 */ | |
#ifdef CFF_CONFIG_OPTION_OLD_ENGINE | |
FT_LOCAL( FT_Error ) | |
cff_decoder_parse_charstrings( CFF_Decoder* decoder, | |
FT_Byte* charstring_base, | |
FT_ULong charstring_len ); | |
#endif | |
FT_LOCAL( FT_Error ) | |
cff_slot_load( CFF_GlyphSlot glyph, | |
CFF_Size size, | |
FT_UInt glyph_index, | |
FT_Int32 load_flags ); | |
FT_END_HEADER | |
#endif /* __CFFGLOAD_H__ */ | |
/* END */ |