ref: 34010f7c473330907b39bd7d55e985f407d7f87c
dir: /src/cff/cffgload.h/
/***************************************************************************/
/* */
/* cffgload.h */
/* */
/* OpenType Glyph Loader (specification). */
/* */
/* Copyright 1996-2017 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,
FT_Bool in_dict );
#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 */