/* cairo - a vector graphics library with display and print output
*
* Copyright © 2006 Red Hat, Inc
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is Red Hat, Inc.
*
* Contributor(s):
* Kristian Høgsberg <krh@redhat.com>
* Adrian Johnson <ajohnson@redneon.com>
*/
#ifndef CAIRO_TRUETYPE_SUBSET_PRIVATE_H
#define CAIRO_TRUETYPE_SUBSET_PRIVATE_H
#include "cairoint.h"
#if CAIRO_HAS_FONT_SUBSET
/* The structs defined here should strictly follow the TrueType
* specification and not be padded. We use only 16-bit integer
* in their definition to guarantee that. The fields of type
* "FIXED" in the TT spec are broken into two *_1 and *_2 16-bit
* parts, and 64-bit members are broken into four.
*
* The test truetype-tables in the test suite makes sure that
* these tables have the right size. Please update that test
* if you add new tables/structs that should be packed.
*/
#define MAKE_TT_TAG(a, b, c, d) (a<<24 | b<<16 | c<<8 | d)
#define TT_TAG_CFF MAKE_TT_TAG('C','F','F',' ')
#define TT_TAG_cmap MAKE_TT_TAG('c','m','a','p')
#define TT_TAG_cvt MAKE_TT_TAG('c','v','t',' ')
#define TT_TAG_fpgm MAKE_TT_TAG('f','p','g','m')
#define TT_TAG_glyf MAKE_TT_TAG('g','l','y','f')
#define TT_TAG_head MAKE_TT_TAG('h','e','a','d')
#define TT_TAG_hhea MAKE_TT_TAG('h','h','e','a')
#define TT_TAG_hmtx MAKE_TT_TAG('h','m','t','x')
#define TT_TAG_loca MAKE_TT_TAG('l','o','c','a')
#define TT_TAG_maxp MAKE_TT_TAG('m','a','x','p')
#define TT_TAG_name MAKE_TT_TAG('n','a','m','e')
#define TT_TAG_OS2 MAKE_TT_TAG('O','S','/','2')
#define TT_TAG_post MAKE_TT_TAG('p','o','s','t')
#define TT_TAG_prep MAKE_TT_TAG('p','r','e','p')
/* All tt_* structs are big-endian */
typedef struct _tt_cmap_index {
uint16_t platform;
uint16_t encoding;
uint32_t offset;
} tt_cmap_index_t;
typedef struct _tt_cmap {
uint16_t version;
uint16_t num_tables;
tt_cmap_index_t index[1];
} tt_cmap_t;
typedef struct _segment_map {
uint16_t format;
uint16_t length;
uint16_t version;
uint16_t segCountX2;
uint16_t searchRange;
uint16_t entrySelector;
uint16_t rangeShift;
uint16_t endCount[1];
} tt_segment_map_t;
typedef struct _tt_head {
int16_t version_1;
int16_t version_2;
int16_t revision_1;
int16_t revision_2;
uint16_t checksum_1;
uint16_t checksum_2;
uint16_t magic_1;
uint16_t magic_2;
uint16_t flags;
uint16_t units_per_em;
int16_t created_1;
int16_t created_2;
int16_t created_3;
int16_t created_4;
int16_t modified_1;
int16_t modified_2;
int16_t modified_3;
int16_t modified_4;
int16_t x_min; /* FWORD */
int16_t y_min; /* FWORD */
int16_t x_max; /* FWORD */
int16_t y_max; /* FWORD */
uint16_t mac_style;
uint16_t lowest_rec_pppem;
int16_t font_direction_hint;
int16_t index_to_loc_format;
int16_t glyph_data_format;
} tt_head_t;
typedef struct _tt_hhea {
int16_t version_1;
int16_t version_2;
int16_t ascender; /* FWORD */
int16_t descender; /* FWORD */
int16_t line_gap; /* FWORD */
uint16_t advance_max_width; /* UFWORD */
int16_t min_left_side_bearing; /* FWORD */
int16_t min_right_side_bearing; /* FWORD */
int16_t x_max_extent; /* FWORD */
int16_t caret_slope_rise;
int16_t caret_slope_run;
int16_t reserved[5];
int16_t metric_data_format;
uint16_t num_hmetrics;
} tt_hhea_t;
typedef struct _tt_maxp {
int16_t version_1;
int16_t version_2;
uint16_t num_glyphs;
uint16_t max_points;
uint16_t max_contours;
uint16_t max_composite_points;
uint16_t max_composite_contours;
uint16_t max_zones;
uint16_t max_twilight_points;
uint16_t max_storage;
uint16_t max_function_defs;
uint16_t max_instruction_defs;
uint16_t max_stack_elements;
uint16_t max_size_of_instructions;
uint16_t max_component_elements;
uint16_t max_component_depth;
} tt_maxp_t;
typedef struct _tt_name_record {
uint16_t platform;
uint16_t encoding;
uint16_t language;
uint16_t name;
uint16_t length;
uint16_t offset;
} tt_name_record_t;
typedef struct _tt_name {
uint16_t format;
uint16_t num_records;
uint16_t strings_offset;
tt_name_record_t records[1];
} tt_name_t;
/* bitmask for fsSelection field */
#define TT_FS_SELECTION_ITALIC 1
#define TT_FS_SELECTION_BOLD 32
/* _unused fields are defined in TT spec but not used by cairo */
typedef struct _tt_os2 {
uint16_t _unused1[2];
uint16_t usWeightClass;
uint16_t _unused2[28];
uint16_t fsSelection;
uint16_t _unused3[11];
} tt_os2_t;
/* composite_glyph_t flags */
#define TT_ARG_1_AND_2_ARE_WORDS 0x0001
#define TT_WE_HAVE_A_SCALE 0x0008
#define TT_MORE_COMPONENTS 0x0020
#define TT_WE_HAVE_AN_X_AND_Y_SCALE 0x0040
#define TT_WE_HAVE_A_TWO_BY_TWO 0x0080
typedef struct _tt_composite_glyph {
uint16_t flags;
uint16_t index;
uint16_t args[6]; /* 1 to 6 arguments depending on value of flags */
} tt_composite_glyph_t;
typedef struct _tt_glyph_data {
int16_t num_contours;
int8_t data[8];
tt_composite_glyph_t glyph;
} tt_glyph_data_t;
#endif /* CAIRO_HAS_FONT_SUBSET */
#endif /* CAIRO_TRUETYPE_SUBSET_PRIVATE_H */