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