// SPDX-License-Identifier: MIT OR MPL-2.0 OR LGPL-2.1-or-later OR GPL-2.0-or-later // Copyright 2010, SIL International, All rights reserved. #pragma once /* Responsibility: Tim Eves Last reviewed: Not yet. Description: Provides types required to represent the TTF basic types. */ //********************************************************************************************** // Include files //********************************************************************************************** namespace graphite2 { namespace TtfUtil { //********************************************************************************************** // Forward declarations //********************************************************************************************** //********************************************************************************************** // Type declarations //********************************************************************************************** typedef unsigned char uint8; typedef uint8 byte; typedef signed char int8; typedef unsigned short uint16; typedef short int16; typedef unsigned int uint32; typedef int int32; typedef int16 short_frac; typedef int32 fixed; typedef int16 fword; typedef uint16 ufword; typedef int16 f2dot14; typedef uint32 long_date_time[2]; //********************************************************************************************** // Constants and enum types //**********************************************************************************************/ enum { OneFix = 1<<16 }; //********************************************************************************************** // Table declarations //********************************************************************************************** namespace Sfnt { #pragma pack(push,1) // We need this or the structure members aren't aligned // correctly. Fortunately this form of pragma is supposed // to be recognised by VS C++ too (at least according to // MSDN). struct OffsetSubTable { uint32 scaler_type; uint16 num_tables, search_range, entry_selector, range_shift; struct Entry { uint32 tag, checksum, offset, length; } table_directory[1]; enum ScalerType { TrueTypeMac = 0x74727565U, TrueTypeWin = 0x00010000U, Type1 = 0x74797031U }; }; struct CharacterCodeMap { uint16 version, num_subtables; struct { uint16 platform_id, platform_specific_id; uint32 offset; } encoding[1]; }; struct CmapSubTable { uint16 format, length, language; }; struct CmapSubTableFormat4 : CmapSubTable { uint16 seg_count_x2, search_range, entry_selector, range_shift, end_code[1]; // There are arrarys after this which need their // start positions calculated since end_code is // seg_count uint16s long. }; struct CmapSubTableFormat12 { fixed format; uint32 length, language, num_groups; struct { uint32 start_char_code, end_char_code, start_glyph_id; } group[1]; }; struct FontHeader { fixed version, font_revision; uint32 check_sum_adjustment, magic_number; uint16 flags, units_per_em; long_date_time created, modified; fword x_min, y_min, x_max, y_max; uint16 mac_style, lowest_rec_ppem; int16 font_direction_hint, index_to_loc_format, glyph_data_format; enum { MagicNumber = 0x5F0F3CF5, GlypDataFormat = 0 }; enum {ShortIndexLocFormat, LongIndexLocFormat}; }; struct PostScriptGlyphName { fixed format, italic_angle; fword underline_position, underline_thickness; uint32 is_fixed_pitch, min_mem_type42, max_mem_type42, min_mem_type1, max_mem_type1; enum { Format1 = 0x10000, Format2 = 0x20000, Format25 = 0x28000, Format3 = 0x30000, Format4 = 0x40000 }; }; struct PostScriptGlyphName2 : PostScriptGlyphName { uint16 number_of_glyphs, glyph_name_index[1]; }; struct PostScriptGlyphName25 : PostScriptGlyphName { uint16 number_of_glyphs; int8 offset[1]; }; struct PostScriptGlyphName3 : PostScriptGlyphName {}; struct PostScriptGlyphName4 : PostScriptGlyphName { uint16 glyph_to_char_map[1]; }; struct HorizontalHeader { fixed version; fword ascent, descent, line_gap; ufword advance_width_max; fword min_left_side_bearing, max_left_side_bearing, x_max_element; int16 caret_slope_rise, caret_slope_run; fword caret_offset; int16 reserved[4], metric_data_format; uint16 num_long_hor_metrics; }; struct MaximumProfile { fixed version; uint16 num_glyphs, max_points, max_contours, max_component_points, max_component_contours, max_zones, max_twilight_points, max_storage, max_function_defs, max_instruction_defs, max_stack_elements, max_size_of_instructions, max_component_elements, max_component_depth; }; typedef byte Panose[10]; struct Compatibility0 { uint16 version; int16 x_avg_char_width; uint16 weight_class, width_class; int16 fs_type, y_subscript_x_size, y_subscript_y_size, y_subscript_x_offset, y_subscript_y_offset, y_superscript_x_size, y_superscript_y_size, y_superscript_x_offset, y_superscript_y_offset, y_strikeout_size, y_strikeout_position, family_class; Panose panose; uint32 unicode_range[4]; int8 ach_vend_id[4]; uint16 fs_selection, fs_first_char_index, fs_last_char_index, // Acording to Apple's spec this is where v0 should end typo_ascender, typo_descender, type_linegap, win_ascent, win_descent; enum { Italic =0x01, Underscore=0x02, Negative =0x04, Outlined =0x08, StrikeOut =0x10, Bold =0x20 }; }; struct Compatibility1 : Compatibility0 { uint32 codepage_range[2]; }; struct Compatibility2 : Compatibility1 { int16 x_height, cap_height; uint16 default_char, break_char, max_context; }; struct Compatibility3 : Compatibility2 {}; typedef Compatibility3 Compatibility; struct NameRecord { uint16 platform_id, platform_specific_id, language_id, name_id, length, offset; enum {Unicode, Mactintosh, Reserved, Microsoft}; enum { Copyright, Family, Subfamily, UniqueSubfamily, Fullname, Version, PostScript }; }; struct LangTagRecord { uint16 length, offset; }; struct FontNames { uint16 format, count, string_offset; NameRecord name_record[1]; }; struct HorizontalMetric { uint16 advance_width; int16 left_side_bearing; }; struct Glyph { int16 number_of_contours; fword x_min, y_min, x_max, y_max; }; struct SimpleGlyph : Glyph { uint16 end_pts_of_contours[1]; enum { OnCurve = 0x01, XShort = 0x02, YShort = 0x04, Repeat = 0x08, XIsSame = 0x10, XIsPos = 0x10, YIsSame = 0x20, YIsPos = 0x20 }; }; struct CompoundGlyph : Glyph { uint16 flags, glyph_index; enum { Arg1Arg2Words = 0x01, ArgsAreXYValues = 0x02, RoundXYToGrid = 0x04, HaveScale = 0x08, MoreComponents = 0x20, HaveXAndYScale = 0x40, HaveTwoByTwo = 0x80, HaveInstructions = 0x100, UseMyMetrics = 0x200, OverlapCompund = 0x400, ScaledOffset = 0x800, UnscaledOffset = 0x1000 }; }; #pragma pack(pop) } // end of namespace Sfnt } // end of namespace TtfUtil } // end of namespace graphite2