| | 1 | /***************************************************************************/ |
| | 2 | /* */ |
| | 3 | /* t1hinter.h */ |
| | 4 | /* */ |
| | 5 | /* Type 1 hinter (body). */ |
| | 6 | /* */ |
| | 7 | /* Copyright 1996-2000 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 T1HINTER_H |
| | 20 | #define T1HINTER_H |
| | 21 | |
| | 22 | |
| | 23 | #ifdef FT_FLAT_COMPILE |
| | 24 | |
| | 25 | #include "t1objs.h" |
| | 26 | #include "t1gload.h" |
| | 27 | |
| | 28 | #else |
| | 29 | |
| | 30 | #include <type1/t1objs.h> |
| | 31 | #include <type1/t1gload.h> |
| | 32 | |
| | 33 | #endif |
| | 34 | |
| | 35 | |
| | 36 | #ifdef __cplusplus |
| | 37 | extern "C" { |
| | 38 | #endif |
| | 39 | |
| | 40 | |
| | 41 | /*************************************************************************/ |
| | 42 | /* */ |
| | 43 | /* <Struct> */ |
| | 44 | /* T1_Snap_Zone */ |
| | 45 | /* */ |
| | 46 | /* <Description> */ |
| | 47 | /* A `snap zone' is used to model either a blue zone or a stem width */ |
| | 48 | /* at a given character size. It is made of a minimum and maximum */ |
| | 49 | /* edge, defined in 26.6 pixels, as well as an `original' and */ |
| | 50 | /* `scaled' position. */ |
| | 51 | /* */ |
| | 52 | /* The position corresponds to the stem width (for stem snap zones) */ |
| | 53 | /* or to the blue position (for blue zones). */ |
| | 54 | /* */ |
| | 55 | /* <Fields> */ |
| | 56 | /* orus :: The original position in font units. */ |
| | 57 | /* */ |
| | 58 | /* pix :: The current position in sub-pixel units. */ |
| | 59 | /* */ |
| | 60 | /* min :: The minimum boundary in sub-pixel units. */ |
| | 61 | /* */ |
| | 62 | /* max :: The maximum boundary in sub-pixel units. */ |
| | 63 | /* */ |
| | 64 | typedef struct T1_Snap_Zone_ |
| | 65 | { |
| | 66 | FT_Pos orus; |
| | 67 | FT_Pos pix; |
| | 68 | FT_Pos min; |
| | 69 | FT_Pos max; |
| | 70 | |
| | 71 | } T1_Snap_Zone; |
| | 72 | |
| | 73 | |
| | 74 | /*************************************************************************/ |
| | 75 | /* */ |
| | 76 | /* <Struct> */ |
| | 77 | /* T1_Edge */ |
| | 78 | /* */ |
| | 79 | /* <Description> */ |
| | 80 | /* A very simple structure used to model a stem edge. */ |
| | 81 | /* */ |
| | 82 | /* <Fields> */ |
| | 83 | /* orus :: The original edge position in font units. */ |
| | 84 | /* */ |
| | 85 | /* pix :: The scaled edge position in sub-pixel units. */ |
| | 86 | /* */ |
| | 87 | typedef struct T1_Edge_ |
| | 88 | { |
| | 89 | FT_Pos orus; |
| | 90 | FT_Pos pix; |
| | 91 | |
| | 92 | } T1_Edge; |
| | 93 | |
| | 94 | |
| | 95 | /*************************************************************************/ |
| | 96 | /* */ |
| | 97 | /* <Struct> */ |
| | 98 | /* T1_Stem_Hint */ |
| | 99 | /* */ |
| | 100 | /* <Description> */ |
| | 101 | /* A simple structure used to model a stem hint. */ |
| | 102 | /* */ |
| | 103 | /* <Fields> */ |
| | 104 | /* min_edge :: The hint's minimum edge. */ |
| | 105 | /* */ |
| | 106 | /* max_edge :: The hint's maximum edge. */ |
| | 107 | /* */ |
| | 108 | /* hint_flags :: Some flags describing the stem properties. */ |
| | 109 | /* */ |
| | 110 | /* <Note> */ |
| | 111 | /* The min and max edges of a ghost stem have the same position, even */ |
| | 112 | /* if they are coded in a weird way in the charstrings. */ |
| | 113 | /* */ |
| | 114 | typedef struct T1_Stem_Hint_ |
| | 115 | { |
| | 116 | T1_Edge min_edge; |
| | 117 | T1_Edge max_edge; |
| | 118 | FT_Int hint_flags; |
| | 119 | |
| | 120 | } T1_Stem_Hint; |
| | 121 | |
| | 122 | |
| | 123 | #define T1_HINT_FLAG_ACTIVE 1 /* indicates an active stem */ |
| | 124 | #define T1_HINT_FLAG_MIN_BORDER 2 /* unused for now */ |
| | 125 | #define T1_HINT_FLAG_MAX_BORDER 4 /* unused for now */ |
| | 126 | |
| | 127 | /* hinter's configuration constants */ |
| | 128 | #define T1_HINTER_MAX_BLUES 24 /* maximum number of blue zones */ |
| | 129 | #define T1_HINTER_MAX_SNAPS 16 /* maximum number of stem snap zones */ |
| | 130 | #define T1_HINTER_MAX_EDGES 64 /* maximum number of stem hints */ |
| | 131 | |
| | 132 | |
| | 133 | /*************************************************************************/ |
| | 134 | /* */ |
| | 135 | /* <Struct> */ |
| | 136 | /* T1_Size_Hints */ |
| | 137 | /* */ |
| | 138 | /* <Description> */ |
| | 139 | /* A structure used to model the hinting information related to a size */ |
| | 140 | /* object. */ |
| | 141 | /* */ |
| | 142 | /* <Fields> */ |
| | 143 | /* supress_overshoots :: A boolean flag to tell whether overshoot */ |
| | 144 | /* supression should occur. */ |
| | 145 | /* */ |
| | 146 | /* num_blue_zones :: The total number of blue zones (top+bottom). */ |
| | 147 | /* */ |
| | 148 | /* num_bottom_zones :: The number of bottom zones. */ |
| | 149 | /* */ |
| | 150 | /* blue_zones :: The blue zones table. Bottom zones are */ |
| | 151 | /* stored first in the table, followed by all */ |
| | 152 | /* top zones. */ |
| | 153 | /* */ |
| | 154 | /* num_snap_widths :: The number of horizontal stem snap zones. */ |
| | 155 | /* */ |
| | 156 | /* snap_widths :: An array of horizontal stem snap zones. */ |
| | 157 | /* */ |
| | 158 | /* num_snap_heights :: The number of vertical stem snap zones. */ |
| | 159 | /* */ |
| | 160 | /* snap_heights :: An array of vertical stem snap zones. */ |
| | 161 | /* */ |
| | 162 | struct T1_Size_Hints_ |
| | 163 | { |
| | 164 | FT_Bool supress_overshoots; |
| | 165 | |
| | 166 | FT_Int num_blue_zones; |
| | 167 | FT_Int num_bottom_zones; |
| | 168 | T1_Snap_Zone blue_zones[T1_HINTER_MAX_BLUES]; |
| | 169 | |
| | 170 | FT_Int num_snap_widths; |
| | 171 | T1_Snap_Zone snap_widths[T1_HINTER_MAX_SNAPS]; |
| | 172 | |
| | 173 | FT_Int num_snap_heights; |
| | 174 | T1_Snap_Zone snap_heights[T1_HINTER_MAX_SNAPS]; |
| | 175 | }; |
| | 176 | |
| | 177 | |
| | 178 | /*************************************************************************/ |
| | 179 | /* */ |
| | 180 | /* <Struct> */ |
| | 181 | /* T1_Stem_Table */ |
| | 182 | /* */ |
| | 183 | /* <Description> */ |
| | 184 | /* A simple structure used to model a set of stem hints in a single */ |
| | 185 | /* direction during the loading of a given glyph outline. Not all */ |
| | 186 | /* stem hints are active at a time. Moreover, stems must be sorted */ |
| | 187 | /* regularly. */ |
| | 188 | /* */ |
| | 189 | /* <Fields> */ |
| | 190 | /* num_stems :: The total number of stems in the table. */ |
| | 191 | /* */ |
| | 192 | /* num_active :: The number of active stems in the table. */ |
| | 193 | /* */ |
| | 194 | /* stems :: A table of all stems. */ |
| | 195 | /* */ |
| | 196 | /* sort :: A table of indices into the stems table, used to */ |
| | 197 | /* keep a sorted list of the active stems. */ |
| | 198 | /* */ |
| | 199 | typedef struct T1_Stem_Table_ |
| | 200 | { |
| | 201 | FT_Int num_stems; |
| | 202 | FT_Int num_active; |
| | 203 | |
| | 204 | T1_Stem_Hint stems[T1_HINTER_MAX_EDGES]; |
| | 205 | FT_Int sort [T1_HINTER_MAX_EDGES]; |
| | 206 | |
| | 207 | } T1_Stem_Table; |
| | 208 | |
| | 209 | |
| | 210 | /*************************************************************************/ |
| | 211 | /* */ |
| | 212 | /* <Struct> */ |
| | 213 | /* T1_Glyph_Hints */ |
| | 214 | /* */ |
| | 215 | /* <Description> */ |
| | 216 | /* A structure used to model the stem hints of a given glyph outline */ |
| | 217 | /* during glyph loading. */ |
| | 218 | /* */ |
| | 219 | /* <Fields> */ |
| | 220 | /* hori_stems :: The horizontal stem hints table. */ |
| | 221 | /* vert_stems :: The vertical stem hints table. */ |
| | 222 | /* */ |
| | 223 | struct T1_Glyph_Hints_ |
| | 224 | { |
| | 225 | T1_Stem_Table hori_stems; |
| | 226 | T1_Stem_Table vert_stems; |
| | 227 | }; |
| | 228 | |
| | 229 | |
| | 230 | /*************************************************************************/ |
| | 231 | /* */ |
| | 232 | /* <Data> */ |
| | 233 | /* t1_hinter_funcs */ |
| | 234 | /* */ |
| | 235 | /* <Description> */ |
| | 236 | /* A table containing the address of various functions used during */ |
| | 237 | /* the loading of an hinted scaled outline. */ |
| | 238 | /* */ |
| | 239 | extern const T1_Hinter_Funcs t1_hinter_funcs; |
| | 240 | |
| | 241 | |
| | 242 | LOCAL_DEF |
| | 243 | FT_Error T1_New_Size_Hinter( T1_Size size ); |
| | 244 | |
| | 245 | LOCAL_DEF |
| | 246 | void T1_Done_Size_Hinter( T1_Size size ); |
| | 247 | |
| | 248 | LOCAL_DEF |
| | 249 | FT_Error T1_Reset_Size_Hinter( T1_Size size ); |
| | 250 | |
| | 251 | LOCAL_DEF |
| | 252 | FT_Error T1_New_Glyph_Hinter( T1_GlyphSlot glyph ); |
| | 253 | |
| | 254 | LOCAL_DEF |
| | 255 | void T1_Done_Glyph_Hinter( T1_GlyphSlot glyph ); |
| | 256 | |
| | 257 | |
| | 258 | LOCAL_DEF |
| | 259 | void T1_Hint_Points( T1_Builder* builder ); |
| | 260 | |
| | 261 | LOCAL_DEF |
| | 262 | void T1_Hint_Stems( T1_Builder* builder ); |
| | 263 | |
| | 264 | |
| | 265 | #ifdef __cplusplus |
| | 266 | } |
| | 267 | #endif |
| | 268 | |
| | 269 | |
| | 270 | #endif /* T1HINTER_H */ |
| | 271 | |
| | 272 | |
| | 273 | /* END */ |
projects / wxWidgets.git / blame_incremental