1 /***************************************************************************/ 2 /* */ 3 /* cffgload.h */ 4 /* */ 5 /* OpenType Glyph Loader (specification). */ 6 /* */ 7 /* Copyright 1996-2004, 2006-2009, 2013 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 FT_LOCAL( FT_Error ) 110 cff_check_points( CFF_Builder* builder, 111 FT_Int count ); 112 113 FT_LOCAL( void ) 114 cff_builder_add_point( CFF_Builder* builder, 115 FT_Pos x, 116 FT_Pos y, 117 FT_Byte flag ); 118 FT_LOCAL( FT_Error ) 119 cff_builder_add_point1( CFF_Builder* builder, 120 FT_Pos x, 121 FT_Pos y ); 122 FT_LOCAL( FT_Error ) 123 cff_builder_start_point( CFF_Builder* builder, 124 FT_Pos x, 125 FT_Pos y ); 126 FT_LOCAL( void ) 127 cff_builder_close_contour( CFF_Builder* builder ); 128 129 130 FT_LOCAL( FT_Int ) 131 cff_lookup_glyph_by_stdcharcode( CFF_Font cff, 132 FT_Int charcode ); 133 FT_LOCAL( FT_Error ) 134 cff_get_glyph_data( TT_Face face, 135 FT_UInt glyph_index, 136 FT_Byte** pointer, 137 FT_ULong* length ); 138 FT_LOCAL( void ) 139 cff_free_glyph_data( TT_Face face, 140 FT_Byte** pointer, 141 FT_ULong length ); 142 143 144 /* execution context charstring zone */ 145 146 typedef struct CFF_Decoder_Zone_ 147 { 148 FT_Byte* base; 149 FT_Byte* limit; 150 FT_Byte* cursor; 151 152 } CFF_Decoder_Zone; 153 154 155 typedef struct CFF_Decoder_ 156 { 157 CFF_Builder builder; 158 CFF_Font cff; 159 160 FT_Fixed stack[CFF_MAX_OPERANDS + 1]; 161 FT_Fixed* top; 162 163 CFF_Decoder_Zone zones[CFF_MAX_SUBRS_CALLS + 1]; 164 CFF_Decoder_Zone* zone; 165 166 FT_Int flex_state; 167 FT_Int num_flex_vectors; 168 FT_Vector flex_vectors[7]; 169 170 FT_Pos glyph_width; 171 FT_Pos nominal_width; 172 173 FT_Bool read_width; 174 FT_Bool width_only; 175 FT_Int num_hints; 176 FT_Fixed buildchar[CFF_MAX_TRANS_ELEMENTS]; 177 178 FT_UInt num_locals; 179 FT_UInt num_globals; 180 181 FT_Int locals_bias; 182 FT_Int globals_bias; 183 184 FT_Byte** locals; 185 FT_Byte** globals; 186 187 FT_Byte** glyph_names; /* for pure CFF fonts only */ 188 FT_UInt num_glyphs; /* number of glyphs in font */ 189 190 FT_Render_Mode hint_mode; 191 192 FT_Bool seac; 193 194 CFF_SubFont current_subfont; /* for current glyph_index */ 195 196 } CFF_Decoder; 197 198 199 FT_LOCAL( void ) 200 cff_decoder_init( CFF_Decoder* decoder, 201 TT_Face face, 202 CFF_Size size, 203 CFF_GlyphSlot slot, 204 FT_Bool hinting, 205 FT_Render_Mode hint_mode ); 206 207 FT_LOCAL( FT_Error ) 208 cff_decoder_prepare( CFF_Decoder* decoder, 209 CFF_Size size, 210 FT_UInt glyph_index ); 211 212 #if 0 /* unused until we support pure CFF fonts */ 213 214 /* Compute the maximum advance width of a font through quick parsing */ 215 FT_LOCAL( FT_Error ) 216 cff_compute_max_advance( TT_Face face, 217 FT_Int* max_advance ); 218 219 #endif /* 0 */ 220 221 #ifdef CFF_CONFIG_OPTION_OLD_ENGINE 222 FT_LOCAL( FT_Error ) 223 cff_decoder_parse_charstrings( CFF_Decoder* decoder, 224 FT_Byte* charstring_base, 225 FT_ULong charstring_len ); 226 #endif 227 228 FT_LOCAL( FT_Error ) 229 cff_slot_load( CFF_GlyphSlot glyph, 230 CFF_Size size, 231 FT_UInt glyph_index, 232 FT_Int32 load_flags ); 233 234 235 FT_END_HEADER 236 237 #endif /* __CFFGLOAD_H__ */ 238 239 240 /* END */ 241
