cairo/src/cairo-truetype-subset-private.h

   1 /* cairo - a vector graphics library with display and print output
   2  *
   3  * Copyright © 2006 Red Hat, Inc
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it either under the terms of the GNU Lesser General Public
   7  * License version 2.1 as published by the Free Software Foundation
   8  * (the "LGPL") or, at your option, under the terms of the Mozilla
   9  * Public License Version 1.1 (the "MPL"). If you do not alter this
  10  * notice, a recipient may use your version of this file under either
  11  * the MPL or the LGPL.
  12  *
  13  * You should have received a copy of the LGPL along with this library
  14  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  16  * You should have received a copy of the MPL along with this library
  17  * in the file COPYING-MPL-1.1
  18  *
  19  * The contents of this file are subject to the Mozilla Public License
  20  * Version 1.1 (the "License"); you may not use this file except in
  21  * compliance with the License. You may obtain a copy of the License at
  22  * http://www.mozilla.org/MPL/
  23  *
  24  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  25  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  26  * the specific language governing rights and limitations.
  27  *
  28  * The Original Code is the cairo graphics library.
  29  *
  30  * The Initial Developer of the Original Code is Red Hat, Inc.
  31  *
  32  * Contributor(s):
  33  *      Kristian Høgsberg <krh@redhat.com>
  34  *      Adrian Johnson <ajohnson@redneon.com>
  35  */
  36
  37 #ifndef CAIRO_TRUETYPE_SUBSET_PRIVATE_H
  38 #define CAIRO_TRUETYPE_SUBSET_PRIVATE_H
  39
  40 #include "cairoint.h"
  41
  42 #if CAIRO_HAS_FONT_SUBSET
  43
  44 /* The structs defined here should strictly follow the TrueType
  45  * specification and not be padded.  We use only 16-bit integer
  46  * in their definition to guarantee that.  The fields of type
  47  * "FIXED" in the TT spec are broken into two *_1 and *_2 16-bit
  48  * parts, and 64-bit members are broken into four.
  49  *
  50  * The test truetype-tables in the test suite makes sure that
  51  * these tables have the right size.  Please update that test
  52  * if you add new tables/structs that should be packed.
  53  */
  54
  55 #define MAKE_TT_TAG(a, b, c, d)    (a<<24 | b<<16 | c<<8 | d)
  56 #define TT_TAG_CFF    MAKE_TT_TAG('C','F','F',' ')
  57 #define TT_TAG_cmap   MAKE_TT_TAG('c','m','a','p')
  58 #define TT_TAG_cvt    MAKE_TT_TAG('c','v','t',' ')
  59 #define TT_TAG_fpgm   MAKE_TT_TAG('f','p','g','m')
  60 #define TT_TAG_glyf   MAKE_TT_TAG('g','l','y','f')
  61 #define TT_TAG_head   MAKE_TT_TAG('h','e','a','d')
  62 #define TT_TAG_hhea   MAKE_TT_TAG('h','h','e','a')
  63 #define TT_TAG_hmtx   MAKE_TT_TAG('h','m','t','x')
  64 #define TT_TAG_loca   MAKE_TT_TAG('l','o','c','a')
  65 #define TT_TAG_maxp   MAKE_TT_TAG('m','a','x','p')
  66 #define TT_TAG_name   MAKE_TT_TAG('n','a','m','e')
  67 #define TT_TAG_post   MAKE_TT_TAG('p','o','s','t')
  68 #define TT_TAG_prep   MAKE_TT_TAG('p','r','e','p')
  69
  70 /* All tt_* structs are big-endian */
  71 typedef struct _tt_cmap_index {
  72     uint16_t platform;
  73     uint16_t encoding;
  74     uint32_t offset;
  75 } tt_cmap_index_t;
  76
  77 typedef struct _tt_cmap {
  78     uint16_t        version;
  79     uint16_t        num_tables;
  80     tt_cmap_index_t index[1];
  81 } tt_cmap_t;
  82
  83 typedef struct _segment_map {
  84     uint16_t format;
  85     uint16_t length;
  86     uint16_t version;
  87     uint16_t segCountX2;
  88     uint16_t searchRange;
  89     uint16_t entrySelector;
  90     uint16_t rangeShift;
  91     uint16_t endCount[1];
  92 } tt_segment_map_t;
  93
  94 typedef struct _tt_head {
  95     int16_t     version_1;
  96     int16_t     version_2;
  97     int16_t     revision_1;
  98     int16_t     revision_2;
  99     uint16_t    checksum_1;
 100     uint16_t    checksum_2;
 101     uint16_t    magic_1;
 102     uint16_t    magic_2;
 103     uint16_t    flags;
 104     uint16_t    units_per_em;
 105     int16_t     created_1;
 106     int16_t     created_2;
 107     int16_t     created_3;
 108     int16_t     created_4;
 109     int16_t     modified_1;
 110     int16_t     modified_2;
 111     int16_t     modified_3;
 112     int16_t     modified_4;
 113     int16_t     x_min;                  /* FWORD */
 114     int16_t     y_min;                  /* FWORD */
 115     int16_t     x_max;                  /* FWORD */
 116     int16_t     y_max;                  /* FWORD */
 117     uint16_t    mac_style;
 118     uint16_t    lowest_rec_pppem;
 119     int16_t     font_direction_hint;
 120     int16_t     index_to_loc_format;
 121     int16_t     glyph_data_format;
 122 } tt_head_t;
 123
 124 typedef struct _tt_hhea {
 125     int16_t     version_1;
 126     int16_t     version_2;
 127     int16_t     ascender;               /* FWORD */
 128     int16_t     descender;              /* FWORD */
 129     int16_t     line_gap;               /* FWORD */
 130     uint16_t    advance_max_width;      /* UFWORD */
 131     int16_t     min_left_side_bearing;  /* FWORD */
 132     int16_t     min_right_side_bearing; /* FWORD */
 133     int16_t     x_max_extent;           /* FWORD */
 134     int16_t     caret_slope_rise;
 135     int16_t     caret_slope_run;
 136     int16_t     reserved[5];
 137     int16_t     metric_data_format;
 138     uint16_t    num_hmetrics;
 139 } tt_hhea_t;
 140
 141 typedef struct _tt_maxp {
 142     int16_t     version_1;
 143     int16_t     version_2;
 144     uint16_t    num_glyphs;
 145     uint16_t    max_points;
 146     uint16_t    max_contours;
 147     uint16_t    max_composite_points;
 148     uint16_t    max_composite_contours;
 149     uint16_t    max_zones;
 150     uint16_t    max_twilight_points;
 151     uint16_t    max_storage;
 152     uint16_t    max_function_defs;
 153     uint16_t    max_instruction_defs;
 154     uint16_t    max_stack_elements;
 155     uint16_t    max_size_of_instructions;
 156     uint16_t    max_component_elements;
 157     uint16_t    max_component_depth;
 158 } tt_maxp_t;
 159
 160 typedef struct _tt_name_record {
 161     uint16_t platform;
 162     uint16_t encoding;
 163     uint16_t language;
 164     uint16_t name;
 165     uint16_t length;
 166     uint16_t offset;
 167 } tt_name_record_t;
 168
 169 typedef struct _tt_name {
 170     uint16_t   format;
 171     uint16_t   num_records;
 172     uint16_t   strings_offset;
 173     tt_name_record_t records[1];
 174 } tt_name_t;
 175
 176
 177
 178 /* composite_glyph_t flags */
 179 #define TT_ARG_1_AND_2_ARE_WORDS     0x0001
 180 #define TT_WE_HAVE_A_SCALE           0x0008
 181 #define TT_MORE_COMPONENTS           0x0020
 182 #define TT_WE_HAVE_AN_X_AND_Y_SCALE  0x0040
 183 #define TT_WE_HAVE_A_TWO_BY_TWO      0x0080
 184
 185 typedef struct _tt_composite_glyph {
 186     uint16_t flags;
 187     uint16_t index;
 188     uint16_t args[7]; /* 1 to 7 arguments depending on value of flags */
 189 } tt_composite_glyph_t;
 190
 191 typedef struct _tt_glyph_data {
 192     int16_t           num_contours;
 193     int8_t            data[8];
 194     tt_composite_glyph_t glyph;
 195 } tt_glyph_data_t;
 196
 197 #endif /* CAIRO_HAS_FONT_SUBSET */
 198
 199 #endif /* CAIRO_TRUETYPE_SUBSET_PRIVATE_H */