| /***************************************************************************/ | |
| /* */ | |
| /* 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 */ |