2 * Copyright (C) 2010 Red Hat, Inc.
\r
4 * This is part of HarfBuzz, a text shaping library.
\r
6 * Permission is hereby granted, without written agreement and without
\r
7 * license or royalty fees, to use, copy, modify, and distribute this
\r
8 * software and its documentation for any purpose, provided that the
\r
9 * above copyright notice and the following two paragraphs appear in
\r
10 * all copies of this software.
\r
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
\r
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
\r
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
\r
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
\r
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
\r
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
\r
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
\r
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
\r
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
\r
24 * Red Hat Author(s): Behdad Esfahbod
\r
27 #ifndef HB_OT_HEAD_PRIVATE_HH
\r
28 #define HB_OT_HEAD_PRIVATE_HH
\r
30 #include "hb-open-type-private.hh"
\r
36 #define HB_OT_TAG_head HB_TAG('h','e','a','d')
\r
40 static const hb_tag_t Tag = HB_OT_TAG_head;
\r
42 inline bool sanitize (hb_sanitize_context_t *c) {
\r
44 /* Shall we check for magicNumber here? Who cares? */
\r
45 return c->check_struct (this) && likely (version.major == 1);
\r
48 FixedVersion version; /* Version of the head table--currently
\r
49 * 0x00010000 for version 1.0. */
\r
50 FixedVersion fontRevision; /* Set by font manufacturer. */
\r
51 ULONG checkSumAdjustment; /* To compute: set it to 0, sum the
\r
52 * entire font as ULONG, then store
\r
53 * 0xB1B0AFBA - sum. */
\r
54 ULONG magicNumber; /* Set to 0x5F0F3CF5. */
\r
55 USHORT flags; /* Bit 0: Baseline for font at y=0;
\r
56 * Bit 1: Left sidebearing point at x=0;
\r
57 * Bit 2: Instructions may depend on point size;
\r
58 * Bit 3: Force ppem to integer values for all
\r
59 * internal scaler math; may use fractional
\r
60 * ppem sizes if this bit is clear;
\r
61 * Bit 4: Instructions may alter advance width
\r
62 * (the advance widths might not scale linearly);
\r
64 * Bits 5-10: These should be set according to
\r
65 * Apple's specification. However, they are not
\r
66 * implemented in OpenType.
\r
67 * Bit 5: This bit should be set in fonts that are
\r
68 * intended to e laid out vertically, and in
\r
69 * which the glyphs have been drawn such that an
\r
70 * x-coordinate of 0 corresponds to the desired
\r
71 * vertical baseline.
\r
72 * Bit 6: This bit must be set to zero.
\r
73 * Bit 7: This bit should be set if the font
\r
74 * requires layout for correct linguistic
\r
75 * rendering (e.g. Arabic fonts).
\r
76 * Bit 8: This bit should be set for a GX font
\r
77 * which has one or more metamorphosis effects
\r
78 * designated as happening by default.
\r
79 * Bit 9: This bit should be set if the font
\r
80 * contains any strong right-to-left glyphs.
\r
81 * Bit 10: This bit should be set if the font
\r
82 * contains Indic-style rearrangement effects.
\r
84 * Bit 11: Font data is 'lossless,' as a result
\r
85 * of having been compressed and decompressed
\r
86 * with the Agfa MicroType Express engine.
\r
87 * Bit 12: Font converted (produce compatible metrics)
\r
88 * Bit 13: Font optimized for ClearType™.
\r
89 * Note, fonts that rely on embedded bitmaps (EBDT)
\r
90 * for rendering should not be considered optimized
\r
91 * for ClearType, and therefore should keep this bit
\r
93 * Bit 14: Reserved, set to 0
\r
94 * Bit 15: Reserved, set to 0. */
\r
95 USHORT unitsPerEm; /* Valid range is from 16 to 16384. This value
\r
96 * should be a power of 2 for fonts that have
\r
97 * TrueType outlines. */
\r
98 LONGDATETIME created; /* Number of seconds since 12:00 midnight,
\r
99 January 1, 1904. 64-bit integer */
\r
100 LONGDATETIME modified; /* Number of seconds since 12:00 midnight,
\r
101 January 1, 1904. 64-bit integer */
\r
102 SHORT xMin; /* For all glyph bounding boxes. */
\r
103 SHORT yMin; /* For all glyph bounding boxes. */
\r
104 SHORT xMax; /* For all glyph bounding boxes. */
\r
105 SHORT yMax; /* For all glyph bounding boxes. */
\r
106 USHORT macStyle; /* Bit 0: Bold (if set to 1);
\r
107 * Bit 1: Italic (if set to 1)
\r
108 * Bit 2: Underline (if set to 1)
\r
109 * Bit 3: Outline (if set to 1)
\r
110 * Bit 4: Shadow (if set to 1)
\r
111 * Bit 5: Condensed (if set to 1)
\r
112 * Bit 6: Extended (if set to 1)
\r
113 * Bits 7-15: Reserved (set to 0). */
\r
114 USHORT lowestRecPPEM; /* Smallest readable size in pixels. */
\r
115 SHORT fontDirectionHint; /* Deprecated (Set to 2).
\r
116 * 0: Fully mixed directional glyphs;
\r
117 * 1: Only strongly left to right;
\r
118 * 2: Like 1 but also contains neutrals;
\r
119 * -1: Only strongly right to left;
\r
120 * -2: Like -1 but also contains neutrals. */
\r
121 SHORT indexToLocFormat; /* 0 for short offsets, 1 for long. */
\r
122 SHORT glyphDataFormat; /* 0 for current format. */
\r
124 DEFINE_SIZE_STATIC (54);
\r
128 #endif /* HB_OT_HEAD_PRIVATE_HH */
\r