4 * Copyright (C) 2011-2013 by Werner Lemberg.
6 * This file is part of the ttfautohint library, and may only be used,
7 * modified, and distributed under the terms given in `COPYING'. By
8 * continuing to use, modify, or distribute this file you indicate that you
9 * have read `COPYING' and understand and accept it fully.
11 * The file `COPYING' mentioned in the previous paragraph is distributed
12 * with the ttfautohint library.
22 #include FT_FREETYPE_H
23 #include FT_TRUETYPE_TABLES_H
24 #include FT_TRUETYPE_TAGS_H
31 #include <ttfautohint.h>
32 #include <numberset.h>
35 #define TTFAUTOHINT_GLYPH ".ttfautohint"
36 #define TTFAUTOHINT_GLYPH_FIRST_BYTE "\x0C" /* first byte is string length */
37 #define TTFAUTOHINT_GLYPH_LEN 13
39 /* these macros convert 16bit and 32bit numbers into single bytes */
40 /* using the byte order needed within SFNT files */
42 #define HIGH(x) (FT_Byte)(((x) & 0xFF00) >> 8)
43 #define LOW(x) ((x) & 0x00FF)
45 #define BYTE1(x) (FT_Byte)(((x) & 0xFF000000UL) >> 24);
46 #define BYTE2(x) (FT_Byte)(((x) & 0x00FF0000UL) >> 16);
47 #define BYTE3(x) (FT_Byte)(((x) & 0x0000FF00UL) >> 8);
48 #define BYTE4(x) ((x) & 0x000000FFUL);
51 /* the length of a dummy `DSIG' table */
54 /* the length of our `gasp' table */
57 /* an empty slot in the table info array */
58 #define MISSING (FT_ULong)~0
60 /* the offset to the loca table format in the `head' table */
61 #define LOCA_FORMAT_OFFSET 51
63 /* various offsets within the `maxp' table */
64 #define MAXP_NUM_GLYPHS 4
65 #define MAXP_MAX_COMPOSITE_POINTS 10
66 #define MAXP_MAX_COMPOSITE_CONTOURS 12
67 #define MAXP_MAX_ZONES_OFFSET 14
68 #define MAXP_MAX_TWILIGHT_POINTS_OFFSET 16
69 #define MAXP_MAX_STORAGE_OFFSET 18
70 #define MAXP_MAX_FUNCTION_DEFS_OFFSET 20
71 #define MAXP_MAX_INSTRUCTION_DEFS_OFFSET 22
72 #define MAXP_MAX_STACK_ELEMENTS_OFFSET 24
73 #define MAXP_MAX_INSTRUCTIONS_OFFSET 26
74 #define MAXP_MAX_COMPONENTS_OFFSET 28
78 /* the offset of the type flags field in the `OS/2' table */
79 #define OS2_FSTYPE_OFFSET 8
82 /* flags in composite glyph records */
83 #define ARGS_ARE_WORDS 0x0001
84 #define ARGS_ARE_XY_VALUES 0x0002
85 #define WE_HAVE_A_SCALE 0x0008
86 #define MORE_COMPONENTS 0x0020
87 #define WE_HAVE_AN_XY_SCALE 0x0040
88 #define WE_HAVE_A_2X2 0x0080
89 #define WE_HAVE_INSTR 0x0100
91 /* flags in simple glyph records */
93 #define X_SHORT_VECTOR 0x02
94 #define Y_SHORT_VECTOR 0x04
101 typedef struct GLYPH_
103 FT_ULong len1
; /* number of bytes before instruction related data */
104 FT_ULong len2
; /* number of bytes after instruction related data; */
105 /* if zero, this indicates a composite glyph */
106 FT_Byte
* buf
; /* extracted glyph data (without instruction related data) */
107 FT_ULong flags_offset
; /* offset to last flag in a composite glyph */
109 FT_ULong ins_len
; /* number of new instructions */
110 FT_Byte
* ins_buf
; /* new instruction data */
112 FT_Short num_contours
; /* >= 0 for simple glyphs */
113 FT_UShort num_points
; /* number of points in a simple glyph */
115 FT_UShort num_components
;
116 FT_UShort
* components
; /* the subglyph indices of a composite glyph */
118 FT_UShort num_pointsums
;
119 FT_UShort
* pointsums
; /* the pointsums of all composite elements */
120 /* (after walking recursively over all subglyphs) */
122 FT_UShort num_composite_contours
; /* after recursion */
125 /* a representation of the data in the `glyf' table */
126 typedef struct glyf_Data_
128 FT_UShort num_glyphs
;
131 /* this index gives the `master' globals for a `glyf' table; */
132 /* see function `TA_sfnt_handle_coverage' */
133 TA_FaceGlobals master_globals
;
135 /* if a `glyf' table gets used in more than one subfont, */
136 /* so do `cvt', `fpgm', and `prep' tables: */
137 /* these four tables are always handled in parallel */
142 /* scripts present in a font get a running number */
143 FT_UInt script_ids
[TA_SCRIPT_MAX
];
144 FT_UInt num_used_scripts
;
146 /* we have separate CVT data for each script */
147 FT_UInt cvt_offsets
[TA_SCRIPT_MAX
];
148 FT_UInt cvt_horz_width_sizes
[TA_SCRIPT_MAX
];
149 FT_UInt cvt_vert_width_sizes
[TA_SCRIPT_MAX
];
150 FT_UInt cvt_blue_zone_sizes
[TA_SCRIPT_MAX
];
151 FT_UInt cvt_blue_adjustment_offsets
[TA_SCRIPT_MAX
];
155 typedef struct SFNT_Table_
159 FT_Byte
* buf
; /* the table data */
160 FT_ULong offset
; /* from beginning of file */
162 void* data
; /* used e.g. for `glyf' table data */
166 /* we use indices into the SFNT table array to */
167 /* represent table info records of the TTF header */
168 typedef FT_ULong SFNT_Table_Info
;
170 /* this structure is used to model a TTF or a subfont within a TTC */
175 SFNT_Table_Info
* table_infos
;
176 FT_ULong num_table_infos
;
178 /* various SFNT table indices */
189 /* values necessary to update the `maxp' table */
190 FT_UShort max_composite_points
;
191 FT_UShort max_composite_contours
;
192 FT_UShort max_storage
;
193 FT_UShort max_stack_elements
;
194 FT_UShort max_twilight_points
;
195 FT_UShort max_instructions
;
196 FT_UShort max_components
;
199 /* our font object */
218 /* we have a single `gasp' table for all subfonts */
221 TA_LoaderRec loader
[1]; /* the interface to the autohinter */
223 /* configuration options */
224 TA_Progress_Func progress
;
228 FT_UInt hinting_range_min
;
229 FT_UInt hinting_range_max
;
230 FT_UInt hinting_limit
;
231 FT_UInt increase_x_height
;
232 number_range
* x_height_snapping_exceptions
;
233 FT_Bool gray_strong_stem_width
;
234 FT_Bool gdi_cleartype_strong_stem_width
;
235 FT_Bool dw_cleartype_strong_stem_width
;
236 FT_Bool windows_compatibility
;
238 FT_Bool hint_composites
;
239 FT_Bool ignore_restrictions
;
240 TA_Script fallback_script
;
247 #include "tatables.h"
248 #include "tabytecode.h"
252 TA_get_error_message(FT_Error error
);
255 TA_get_current_time(FT_ULong
* high
,
259 TA_build_push(FT_Byte
* bufp
,
266 TA_font_init(FONT
* font
);
268 TA_font_unload(FONT
* font
,
273 TA_font_file_read(FONT
* font
,
276 TA_font_file_write(FONT
* font
,
280 TA_sfnt_build_glyph_instructions(SFNT
* sfnt
,
285 TA_sfnt_split_into_SFNT_tables(SFNT
* sfnt
,
289 TA_sfnt_build_cvt_table(SFNT
* sfnt
,
293 TA_table_build_DSIG(FT_Byte
** DSIG
);
296 TA_sfnt_build_fpgm_table(SFNT
* sfnt
,
300 TA_sfnt_build_gasp_table(SFNT
* sfnt
,
304 TA_sfnt_split_glyf_table(SFNT
* sfnt
,
307 TA_sfnt_build_glyf_table(SFNT
* sfnt
,
310 TA_sfnt_create_glyf_data(SFNT
* sfnt
,
313 TA_sfnt_handle_coverage(SFNT
* sfnt
,
316 TA_sfnt_adjust_master_coverage(SFNT
* sfnt
,
320 TA_sfnt_copy_master_coverage(SFNT
* sfnt
,
325 TA_sfnt_update_GPOS_table(SFNT
* sfnt
,
329 TA_sfnt_update_hmtx_table(SFNT
* sfnt
,
333 TA_sfnt_build_loca_table(SFNT
* sfnt
,
337 TA_sfnt_update_maxp_table(SFNT
* sfnt
,
341 TA_sfnt_update_post_table(SFNT
* sfnt
,
345 TA_sfnt_update_name_table(SFNT
* sfnt
,
349 TA_sfnt_build_prep_table(SFNT
* sfnt
,
353 TA_sfnt_build_TTF_header(SFNT
* sfnt
,
355 FT_Byte
** header_buf
,
356 FT_ULong
* header_len
,
359 TA_font_build_TTF(FONT
* font
);
362 TA_font_build_TTC(FONT
* font
);
364 #endif /* __TA_H__ */