4 * Copyright (C) 2011-2014 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>
36 #define TTFAUTOHINT_GLYPH ".ttfautohint"
37 #define TTFAUTOHINT_GLYPH_FIRST_BYTE "\x0C" /* first byte is string length */
38 #define TTFAUTOHINT_GLYPH_LEN 13
40 /* these macros convert 16bit and 32bit numbers into single bytes */
41 /* using the byte order needed within SFNT files */
43 #define HIGH(x) (FT_Byte)(((x) & 0xFF00) >> 8)
44 #define LOW(x) ((x) & 0x00FF)
46 #define BYTE1(x) (FT_Byte)(((x) & 0xFF000000UL) >> 24);
47 #define BYTE2(x) (FT_Byte)(((x) & 0x00FF0000UL) >> 16);
48 #define BYTE3(x) (FT_Byte)(((x) & 0x0000FF00UL) >> 8);
49 #define BYTE4(x) ((x) & 0x000000FFUL);
52 /* the length of a dummy `DSIG' table */
55 /* the length of our `gasp' table */
58 /* an empty slot in the table info array */
59 #define MISSING (FT_ULong)~0
61 /* the offset to the loca table format in the `head' table */
62 #define LOCA_FORMAT_OFFSET 51
64 /* various offsets within the `maxp' table */
65 #define MAXP_NUM_GLYPHS 4
66 #define MAXP_MAX_COMPOSITE_POINTS 10
67 #define MAXP_MAX_COMPOSITE_CONTOURS 12
68 #define MAXP_MAX_ZONES_OFFSET 14
69 #define MAXP_MAX_TWILIGHT_POINTS_OFFSET 16
70 #define MAXP_MAX_STORAGE_OFFSET 18
71 #define MAXP_MAX_FUNCTION_DEFS_OFFSET 20
72 #define MAXP_MAX_INSTRUCTION_DEFS_OFFSET 22
73 #define MAXP_MAX_STACK_ELEMENTS_OFFSET 24
74 #define MAXP_MAX_INSTRUCTIONS_OFFSET 26
75 #define MAXP_MAX_COMPONENTS_OFFSET 28
79 /* the offset of the type flags field in the `OS/2' table */
80 #define OS2_FSTYPE_OFFSET 8
83 /* flags in composite glyph records */
84 #define ARGS_ARE_WORDS 0x0001
85 #define ARGS_ARE_XY_VALUES 0x0002
86 #define WE_HAVE_A_SCALE 0x0008
87 #define MORE_COMPONENTS 0x0020
88 #define WE_HAVE_AN_XY_SCALE 0x0040
89 #define WE_HAVE_A_2X2 0x0080
90 #define WE_HAVE_INSTR 0x0100
92 /* flags in simple glyph records */
94 #define X_SHORT_VECTOR 0x02
95 #define Y_SHORT_VECTOR 0x04
102 typedef struct GLYPH_
104 FT_ULong len1
; /* number of bytes before instruction related data */
105 FT_ULong len2
; /* number of bytes after instruction related data; */
106 /* if zero, this indicates a composite glyph */
107 FT_Byte
* buf
; /* extracted glyph data (without instruction related data) */
108 FT_ULong flags_offset
; /* offset to last flag in a composite glyph */
110 FT_ULong ins_len
; /* number of new instructions */
111 FT_Byte
* ins_buf
; /* new instruction data */
113 FT_Short num_contours
; /* >= 0 for simple glyphs */
114 FT_UShort num_points
; /* number of points in a simple glyph */
116 FT_UShort num_components
;
117 FT_UShort
* components
; /* the subglyph indices of a composite glyph */
119 FT_UShort num_pointsums
;
120 FT_UShort
* pointsums
; /* the pointsums of all composite elements */
121 /* (after walking recursively over all subglyphs) */
123 FT_UShort num_composite_contours
; /* after recursion */
126 /* a representation of the data in the `glyf' table */
127 typedef struct glyf_Data_
129 FT_UShort num_glyphs
;
132 /* this field gives the `master' globals for a `glyf' table; */
133 /* see function `TA_sfnt_handle_coverage' */
134 TA_FaceGlobals master_globals
;
135 /* for coverage bookkeeping */
138 /* if a `glyf' table gets used in more than one subfont, */
139 /* so do `cvt', `fpgm', and `prep' tables: */
140 /* these four tables are always handled in parallel */
145 /* styles present in a font get a running number */
146 FT_UInt style_ids
[TA_STYLE_MAX
];
147 FT_UInt num_used_styles
;
149 /* we have separate CVT data for each style */
150 FT_UInt cvt_offsets
[TA_STYLE_MAX
];
151 FT_UInt cvt_horz_width_sizes
[TA_STYLE_MAX
];
152 FT_UInt cvt_vert_width_sizes
[TA_STYLE_MAX
];
153 FT_UInt cvt_blue_zone_sizes
[TA_STYLE_MAX
];
154 FT_UInt cvt_blue_adjustment_offsets
[TA_STYLE_MAX
];
158 typedef struct SFNT_Table_
162 FT_Byte
* buf
; /* the table data */
163 FT_ULong offset
; /* from beginning of file */
165 void* data
; /* used e.g. for `glyf' table data */
169 /* we use indices into the SFNT table array to */
170 /* represent table info records of the TTF header */
171 typedef FT_ULong SFNT_Table_Info
;
173 /* this structure is used to model a TTF or a subfont within a TTC */
178 SFNT_Table_Info
* table_infos
;
179 FT_ULong num_table_infos
;
181 /* various SFNT table indices */
192 /* values necessary to update the `maxp' table */
193 FT_UShort max_composite_points
;
194 FT_UShort max_composite_contours
;
195 FT_UShort max_storage
;
196 FT_UShort max_stack_elements
;
197 FT_UShort max_twilight_points
;
198 FT_UShort max_instructions
;
199 FT_UShort max_components
;
202 /* our font object */
224 /* we have a single `gasp' table for all subfonts */
227 TA_LoaderRec loader
[1]; /* the interface to the autohinter */
229 /* configuration options */
230 TA_Progress_Func progress
;
234 FT_UInt hinting_range_min
;
235 FT_UInt hinting_range_max
;
236 FT_UInt hinting_limit
;
237 FT_UInt increase_x_height
;
238 number_range
* x_height_snapping_exceptions
;
239 FT_UInt fallback_stem_width
;
240 FT_Bool gray_strong_stem_width
;
241 FT_Bool gdi_cleartype_strong_stem_width
;
242 FT_Bool dw_cleartype_strong_stem_width
;
243 FT_Bool windows_compatibility
;
244 FT_Bool adjust_subglyphs
;
245 FT_Bool hint_composites
;
246 FT_Bool ignore_restrictions
;
247 TA_Style fallback_style
;
248 TA_Script default_script
;
255 #include "tatables.h"
256 #include "tabytecode.h"
260 TA_get_error_message(FT_Error error
);
263 TA_get_current_time(FT_ULong
* high
,
267 TA_build_push(FT_Byte
* bufp
,
274 TA_font_init(FONT
* font
);
276 TA_font_unload(FONT
* font
,
281 TA_font_file_read(FONT
* font
,
284 TA_font_file_write(FONT
* font
,
287 TA_deltas_file_read(FONT
* font
,
291 TA_sfnt_build_glyph_instructions(SFNT
* sfnt
,
296 TA_sfnt_split_into_SFNT_tables(SFNT
* sfnt
,
300 TA_sfnt_build_cvt_table(SFNT
* sfnt
,
304 TA_table_build_DSIG(FT_Byte
** DSIG
);
307 TA_sfnt_build_fpgm_table(SFNT
* sfnt
,
311 TA_sfnt_build_gasp_table(SFNT
* sfnt
,
315 TA_sfnt_split_glyf_table(SFNT
* sfnt
,
318 TA_sfnt_build_glyf_table(SFNT
* sfnt
,
321 TA_sfnt_create_glyf_data(SFNT
* sfnt
,
324 TA_sfnt_handle_coverage(SFNT
* sfnt
,
327 TA_sfnt_adjust_coverage(SFNT
* sfnt
,
331 TA_sfnt_copy_master_coverage(SFNT
* sfnt
,
336 TA_sfnt_update_GPOS_table(SFNT
* sfnt
,
340 TA_sfnt_update_hmtx_table(SFNT
* sfnt
,
344 TA_sfnt_build_loca_table(SFNT
* sfnt
,
348 TA_sfnt_update_maxp_table(SFNT
* sfnt
,
352 TA_sfnt_update_post_table(SFNT
* sfnt
,
356 TA_sfnt_update_name_table(SFNT
* sfnt
,
360 TA_sfnt_build_prep_table(SFNT
* sfnt
,
364 TA_sfnt_build_TTF_header(SFNT
* sfnt
,
366 FT_Byte
** header_buf
,
367 FT_ULong
* header_len
,
370 TA_font_build_TTF(FONT
* font
);
373 TA_font_build_TTC(FONT
* font
);
375 #endif /* __TA_H__ */