cffgload.h revision f463818dd9146e11105c0572fb119e757eb47768
1/***************************************************************************/ 2/* */ 3/* cffgload.h */ 4/* */ 5/* OpenType Glyph Loader (specification). */ 6/* */ 7/* Copyright 1996-2001, 2002, 2003, 2004, 2006, 2007 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 28FT_BEGIN_HEADER 29 30 31#define CFF_MAX_OPERANDS 48 32#define CFF_MAX_SUBRS_CALLS 32 33 34 35 /*************************************************************************/ 36 /* */ 37 /* <Structure> */ 38 /* CFF_Builder */ 39 /* */ 40 /* <Description> */ 41 /* A structure used during glyph loading to store its outline. */ 42 /* */ 43 /* <Fields> */ 44 /* memory :: The current memory object. */ 45 /* */ 46 /* face :: The current face object. */ 47 /* */ 48 /* glyph :: The current glyph slot. */ 49 /* */ 50 /* loader :: The current glyph loader. */ 51 /* */ 52 /* base :: The base glyph outline. */ 53 /* */ 54 /* current :: The current glyph outline. */ 55 /* */ 56 /* last :: The last point position. */ 57 /* */ 58 /* scale_x :: The horizontal scale (FUnits to sub-pixels). */ 59 /* */ 60 /* scale_y :: The vertical scale (FUnits to sub-pixels). */ 61 /* */ 62 /* pos_x :: The horizontal translation (if composite glyph). */ 63 /* */ 64 /* pos_y :: The vertical translation (if composite glyph). */ 65 /* */ 66 /* left_bearing :: The left side bearing point. */ 67 /* */ 68 /* advance :: The horizontal advance vector. */ 69 /* */ 70 /* bbox :: Unused. */ 71 /* */ 72 /* path_begun :: A flag which indicates that a new path has begun. */ 73 /* */ 74 /* load_points :: If this flag is not set, no points are loaded. */ 75 /* */ 76 /* no_recurse :: Set but not used. */ 77 /* */ 78 /* metrics_only :: A boolean indicating that we only want to compute */ 79 /* the metrics of a given glyph, not load all of its */ 80 /* points. */ 81 /* */ 82 /* hints_funcs :: Auxiliary pointer for hinting. */ 83 /* */ 84 /* hints_globals :: Auxiliary pointer for hinting. */ 85 /* */ 86 typedef struct CFF_Builder_ 87 { 88 FT_Memory memory; 89 TT_Face face; 90 CFF_GlyphSlot glyph; 91 FT_GlyphLoader loader; 92 FT_Outline* base; 93 FT_Outline* current; 94 95 FT_Vector last; 96 97 FT_Fixed scale_x; 98 FT_Fixed scale_y; 99 100 FT_Pos pos_x; 101 FT_Pos pos_y; 102 103 FT_Vector left_bearing; 104 FT_Vector advance; 105 106 FT_BBox bbox; /* bounding box */ 107 FT_Bool path_begun; 108 FT_Bool load_points; 109 FT_Bool no_recurse; 110 111 FT_Bool metrics_only; 112 113 void* hints_funcs; /* hinter-specific */ 114 void* hints_globals; /* hinter-specific */ 115 116 } CFF_Builder; 117 118 119 /* execution context charstring zone */ 120 121 typedef struct CFF_Decoder_Zone_ 122 { 123 FT_Byte* base; 124 FT_Byte* limit; 125 FT_Byte* cursor; 126 127 } CFF_Decoder_Zone; 128 129 130 typedef struct CFF_Decoder_ 131 { 132 CFF_Builder builder; 133 CFF_Font cff; 134 135 FT_Fixed stack[CFF_MAX_OPERANDS + 1]; 136 FT_Fixed* top; 137 138 CFF_Decoder_Zone zones[CFF_MAX_SUBRS_CALLS + 1]; 139 CFF_Decoder_Zone* zone; 140 141 FT_Int flex_state; 142 FT_Int num_flex_vectors; 143 FT_Vector flex_vectors[7]; 144 145 FT_Pos glyph_width; 146 FT_Pos nominal_width; 147 148 FT_Bool read_width; 149 FT_Int num_hints; 150 FT_Fixed* buildchar; 151 FT_Int len_buildchar; 152 153 FT_UInt num_locals; 154 FT_UInt num_globals; 155 156 FT_Int locals_bias; 157 FT_Int globals_bias; 158 159 FT_Byte** locals; 160 FT_Byte** globals; 161 162 FT_Byte** glyph_names; /* for pure CFF fonts only */ 163 FT_UInt num_glyphs; /* number of glyphs in font */ 164 165 FT_Render_Mode hint_mode; 166 167 } CFF_Decoder; 168 169 170 FT_LOCAL( void ) 171 cff_decoder_init( CFF_Decoder* decoder, 172 TT_Face face, 173 CFF_Size size, 174 CFF_GlyphSlot slot, 175 FT_Bool hinting, 176 FT_Render_Mode hint_mode ); 177 178 FT_LOCAL( FT_Error ) 179 cff_decoder_prepare( CFF_Decoder* decoder, 180 FT_UInt glyph_index ); 181 182#if 0 /* unused until we support pure CFF fonts */ 183 184 /* Compute the maximum advance width of a font through quick parsing */ 185 FT_LOCAL( FT_Error ) 186 cff_compute_max_advance( TT_Face face, 187 FT_Int* max_advance ); 188 189#endif /* 0 */ 190 191 FT_LOCAL( FT_Error ) 192 cff_decoder_parse_charstrings( CFF_Decoder* decoder, 193 FT_Byte* charstring_base, 194 FT_ULong charstring_len ); 195 196 FT_LOCAL( FT_Error ) 197 cff_slot_load( CFF_GlyphSlot glyph, 198 CFF_Size size, 199 FT_UInt glyph_index, 200 FT_Int32 load_flags ); 201 202 203FT_END_HEADER 204 205#endif /* __CFFGLOAD_H__ */ 206 207 208/* END */ 209