1 /***************************************************************************/ 2 /* */ 3 /* cffgload.h */ 4 /* */ 5 /* OpenType Glyph Loader (specification). */ 6 /* */ 7 /* Copyright 1996-2001, 2002, 2003, 2004, 2006, 2007, 2008, 2009 by */ 8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ 9 /* */ 10 /* This file is part of the FreeType project, and may only be used, */ 11 /* modified, and distributed under the terms of the FreeType project */ 12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 13 /* this file you indicate that you have read the license and */ 14 /* understand and accept it fully. */ 15 /* */ 16 /***************************************************************************/ 17 18 19 #ifndef __CFFGLOAD_H__ 20 #define __CFFGLOAD_H__ 21 22 23 #include <ft2build.h> 24 #include FT_FREETYPE_H 25 #include "cffobjs.h" 26 27 28 FT_BEGIN_HEADER 29 30 31 #define CFF_MAX_OPERANDS 48 32 #define CFF_MAX_SUBRS_CALLS 32 33 #define CFF_MAX_TRANS_ELEMENTS 32 34 35 36 /*************************************************************************/ 37 /* */ 38 /* <Structure> */ 39 /* CFF_Builder */ 40 /* */ 41 /* <Description> */ 42 /* A structure used during glyph loading to store its outline. */ 43 /* */ 44 /* <Fields> */ 45 /* memory :: The current memory object. */ 46 /* */ 47 /* face :: The current face object. */ 48 /* */ 49 /* glyph :: The current glyph slot. */ 50 /* */ 51 /* loader :: The current glyph loader. */ 52 /* */ 53 /* base :: The base glyph outline. */ 54 /* */ 55 /* current :: The current glyph outline. */ 56 /* */ 57 /* pos_x :: The horizontal translation (if composite glyph). */ 58 /* */ 59 /* pos_y :: The vertical translation (if composite glyph). */ 60 /* */ 61 /* left_bearing :: The left side bearing point. */ 62 /* */ 63 /* advance :: The horizontal advance vector. */ 64 /* */ 65 /* bbox :: Unused. */ 66 /* */ 67 /* path_begun :: A flag which indicates that a new path has begun. */ 68 /* */ 69 /* load_points :: If this flag is not set, no points are loaded. */ 70 /* */ 71 /* no_recurse :: Set but not used. */ 72 /* */ 73 /* metrics_only :: A boolean indicating that we only want to compute */ 74 /* the metrics of a given glyph, not load all of its */ 75 /* points. */ 76 /* */ 77 /* hints_funcs :: Auxiliary pointer for hinting. */ 78 /* */ 79 /* hints_globals :: Auxiliary pointer for hinting. */ 80 /* */ 81 typedef struct CFF_Builder_ 82 { 83 FT_Memory memory; 84 TT_Face face; 85 CFF_GlyphSlot glyph; 86 FT_GlyphLoader loader; 87 FT_Outline* base; 88 FT_Outline* current; 89 90 FT_Pos pos_x; 91 FT_Pos pos_y; 92 93 FT_Vector left_bearing; 94 FT_Vector advance; 95 96 FT_BBox bbox; /* bounding box */ 97 FT_Bool path_begun; 98 FT_Bool load_points; 99 FT_Bool no_recurse; 100 101 FT_Bool metrics_only; 102 103 void* hints_funcs; /* hinter-specific */ 104 void* hints_globals; /* hinter-specific */ 105 106 } CFF_Builder; 107 108 109 /* execution context charstring zone */ 110 111 typedef struct CFF_Decoder_Zone_ 112 { 113 FT_Byte* base; 114 FT_Byte* limit; 115 FT_Byte* cursor; 116 117 } CFF_Decoder_Zone; 118 119 120 typedef struct CFF_Decoder_ 121 { 122 CFF_Builder builder; 123 CFF_Font cff; 124 125 FT_Fixed stack[CFF_MAX_OPERANDS + 1]; 126 FT_Fixed* top; 127 128 CFF_Decoder_Zone zones[CFF_MAX_SUBRS_CALLS + 1]; 129 CFF_Decoder_Zone* zone; 130 131 FT_Int flex_state; 132 FT_Int num_flex_vectors; 133 FT_Vector flex_vectors[7]; 134 135 FT_Pos glyph_width; 136 FT_Pos nominal_width; 137 138 FT_Bool read_width; 139 FT_Bool width_only; 140 FT_Int num_hints; 141 FT_Fixed buildchar[CFF_MAX_TRANS_ELEMENTS]; 142 143 FT_UInt num_locals; 144 FT_UInt num_globals; 145 146 FT_Int locals_bias; 147 FT_Int globals_bias; 148 149 FT_Byte** locals; 150 FT_Byte** globals; 151 152 FT_Byte** glyph_names; /* for pure CFF fonts only */ 153 FT_UInt num_glyphs; /* number of glyphs in font */ 154 155 FT_Render_Mode hint_mode; 156 157 FT_Bool seac; 158 159 } CFF_Decoder; 160 161 162 FT_LOCAL( void ) 163 cff_decoder_init( CFF_Decoder* decoder, 164 TT_Face face, 165 CFF_Size size, 166 CFF_GlyphSlot slot, 167 FT_Bool hinting, 168 FT_Render_Mode hint_mode ); 169 170 FT_LOCAL( FT_Error ) 171 cff_decoder_prepare( CFF_Decoder* decoder, 172 CFF_Size size, 173 FT_UInt glyph_index ); 174 175 #if 0 /* unused until we support pure CFF fonts */ 176 177 /* Compute the maximum advance width of a font through quick parsing */ 178 FT_LOCAL( FT_Error ) 179 cff_compute_max_advance( TT_Face face, 180 FT_Int* max_advance ); 181 182 #endif /* 0 */ 183 184 FT_LOCAL( FT_Error ) 185 cff_decoder_parse_charstrings( CFF_Decoder* decoder, 186 FT_Byte* charstring_base, 187 FT_ULong charstring_len ); 188 189 FT_LOCAL( FT_Error ) 190 cff_slot_load( CFF_GlyphSlot glyph, 191 CFF_Size size, 192 FT_UInt glyph_index, 193 FT_Int32 load_flags ); 194 195 196 FT_END_HEADER 197 198 #endif /* __CFFGLOAD_H__ */ 199 200 201 /* END */ 202
