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16124 jghali 1
/* cairo - a vector graphics library with display and print output
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 *
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 * Copyright © 2006 Red Hat, Inc
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it either under the terms of the GNU Lesser General Public
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 * License version 2.1 as published by the Free Software Foundation
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 * (the "LGPL") or, at your option, under the terms of the Mozilla
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 * Public License Version 1.1 (the "MPL"). If you do not alter this
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 * notice, a recipient may use your version of this file under either
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 * the MPL or the LGPL.
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 *
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 * You should have received a copy of the LGPL along with this library
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 * in the file COPYING-LGPL-2.1; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 * You should have received a copy of the MPL along with this library
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 * in the file COPYING-MPL-1.1
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 *
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 * The contents of this file are subject to the Mozilla Public License
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 * Version 1.1 (the "License"); you may not use this file except in
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 * compliance with the License. You may obtain a copy of the License at
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 * http://www.mozilla.org/MPL/
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 *
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 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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 * OF ANY KIND, either express or implied. See the LGPL or the MPL for
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 * the specific language governing rights and limitations.
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 *
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 * The Original Code is the cairo graphics library.
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 *
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 * The Initial Developer of the Original Code is Red Hat, Inc.
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 *
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 * Contributor(s):
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 *      Kristian Høgsberg <krh@redhat.com>
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 *      Adrian Johnson <ajohnson@redneon.com>
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 */
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#ifndef CAIRO_TRUETYPE_SUBSET_PRIVATE_H
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#define CAIRO_TRUETYPE_SUBSET_PRIVATE_H
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#include "cairoint.h"
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#if CAIRO_HAS_FONT_SUBSET
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/* The structs defined here should strictly follow the TrueType
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 * specification and not be padded.  We use only 16-bit integer
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 * in their definition to guarantee that.  The fields of type
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 * "FIXED" in the TT spec are broken into two *_1 and *_2 16-bit
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 * parts, and 64-bit members are broken into four.
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 *
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 * The test truetype-tables in the test suite makes sure that
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 * these tables have the right size.  Please update that test
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 * if you add new tables/structs that should be packed.
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 */
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#define MAKE_TT_TAG(a, b, c, d)    (a<<24 | b<<16 | c<<8 | d)
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#define TT_TAG_CFF    MAKE_TT_TAG('C','F','F',' ')
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#define TT_TAG_cmap   MAKE_TT_TAG('c','m','a','p')
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#define TT_TAG_cvt    MAKE_TT_TAG('c','v','t',' ')
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#define TT_TAG_fpgm   MAKE_TT_TAG('f','p','g','m')
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#define TT_TAG_glyf   MAKE_TT_TAG('g','l','y','f')
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#define TT_TAG_head   MAKE_TT_TAG('h','e','a','d')
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#define TT_TAG_hhea   MAKE_TT_TAG('h','h','e','a')
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#define TT_TAG_hmtx   MAKE_TT_TAG('h','m','t','x')
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#define TT_TAG_loca   MAKE_TT_TAG('l','o','c','a')
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#define TT_TAG_maxp   MAKE_TT_TAG('m','a','x','p')
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#define TT_TAG_name   MAKE_TT_TAG('n','a','m','e')
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#define TT_TAG_post   MAKE_TT_TAG('p','o','s','t')
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#define TT_TAG_prep   MAKE_TT_TAG('p','r','e','p')
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/* All tt_* structs are big-endian */
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typedef struct _tt_cmap_index {
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    uint16_t platform;
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    uint16_t encoding;
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    uint32_t offset;
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} tt_cmap_index_t;
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typedef struct _tt_cmap {
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    uint16_t        version;
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    uint16_t        num_tables;
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    tt_cmap_index_t index[1];
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} tt_cmap_t;
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typedef struct _segment_map {
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    uint16_t format;
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    uint16_t length;
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    uint16_t version;
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    uint16_t segCountX2;
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    uint16_t searchRange;
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    uint16_t entrySelector;
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    uint16_t rangeShift;
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    uint16_t endCount[1];
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} tt_segment_map_t;
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typedef struct _tt_head {
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    int16_t     version_1;
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    int16_t     version_2;
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    int16_t     revision_1;
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    int16_t     revision_2;
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    uint16_t    checksum_1;
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    uint16_t    checksum_2;
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    uint16_t    magic_1;
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    uint16_t    magic_2;
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    uint16_t    flags;
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    uint16_t    units_per_em;
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    int16_t     created_1;
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    int16_t     created_2;
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    int16_t     created_3;
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    int16_t     created_4;
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    int16_t     modified_1;
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    int16_t     modified_2;
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    int16_t     modified_3;
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    int16_t     modified_4;
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    int16_t     x_min;                  /* FWORD */
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    int16_t     y_min;                  /* FWORD */
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    int16_t     x_max;                  /* FWORD */
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    int16_t     y_max;                  /* FWORD */
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    uint16_t    mac_style;
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    uint16_t    lowest_rec_pppem;
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    int16_t     font_direction_hint;
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    int16_t     index_to_loc_format;
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    int16_t     glyph_data_format;
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} tt_head_t;
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typedef struct _tt_hhea {
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    int16_t     version_1;
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    int16_t     version_2;
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    int16_t     ascender;               /* FWORD */
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    int16_t     descender;              /* FWORD */
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    int16_t     line_gap;               /* FWORD */
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    uint16_t    advance_max_width;      /* UFWORD */
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    int16_t     min_left_side_bearing;  /* FWORD */
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    int16_t     min_right_side_bearing; /* FWORD */
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    int16_t     x_max_extent;           /* FWORD */
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    int16_t     caret_slope_rise;
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    int16_t     caret_slope_run;
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    int16_t     reserved[5];
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    int16_t     metric_data_format;
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    uint16_t    num_hmetrics;
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} tt_hhea_t;
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typedef struct _tt_maxp {
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    int16_t     version_1;
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    int16_t     version_2;
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    uint16_t    num_glyphs;
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    uint16_t    max_points;
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    uint16_t    max_contours;
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    uint16_t    max_composite_points;
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    uint16_t    max_composite_contours;
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    uint16_t    max_zones;
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    uint16_t    max_twilight_points;
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    uint16_t    max_storage;
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    uint16_t    max_function_defs;
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    uint16_t    max_instruction_defs;
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    uint16_t    max_stack_elements;
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    uint16_t    max_size_of_instructions;
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    uint16_t    max_component_elements;
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    uint16_t    max_component_depth;
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} tt_maxp_t;
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typedef struct _tt_name_record {
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    uint16_t platform;
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    uint16_t encoding;
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    uint16_t language;
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    uint16_t name;
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    uint16_t length;
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    uint16_t offset;
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} tt_name_record_t;
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typedef struct _tt_name {
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    uint16_t   format;
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    uint16_t   num_records;
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    uint16_t   strings_offset;
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    tt_name_record_t records[1];
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} tt_name_t;
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/* composite_glyph_t flags */
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#define TT_ARG_1_AND_2_ARE_WORDS     0x0001
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#define TT_WE_HAVE_A_SCALE           0x0008
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#define TT_MORE_COMPONENTS           0x0020
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#define TT_WE_HAVE_AN_X_AND_Y_SCALE  0x0040
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#define TT_WE_HAVE_A_TWO_BY_TWO      0x0080
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typedef struct _tt_composite_glyph {
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    uint16_t flags;
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    uint16_t index;
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    uint16_t args[6]; /* 1 to 6 arguments depending on value of flags */
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} tt_composite_glyph_t;
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typedef struct _tt_glyph_data {
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    int16_t           num_contours;
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    int8_t            data[8];
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    tt_composite_glyph_t glyph;
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} tt_glyph_data_t;
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#endif /* CAIRO_HAS_FONT_SUBSET */
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#endif /* CAIRO_TRUETYPE_SUBSET_PRIVATE_H */