1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/harfbuzz/src/hb-ot-head-table.hh Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,149 @@
1.4 +/*
1.5 + * Copyright © 2010 Red Hat, Inc.
1.6 + * Copyright © 2012 Google, Inc.
1.7 + *
1.8 + * This is part of HarfBuzz, a text shaping library.
1.9 + *
1.10 + * Permission is hereby granted, without written agreement and without
1.11 + * license or royalty fees, to use, copy, modify, and distribute this
1.12 + * software and its documentation for any purpose, provided that the
1.13 + * above copyright notice and the following two paragraphs appear in
1.14 + * all copies of this software.
1.15 + *
1.16 + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
1.17 + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
1.18 + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
1.19 + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
1.20 + * DAMAGE.
1.21 + *
1.22 + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
1.23 + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
1.24 + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
1.25 + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
1.26 + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
1.27 + *
1.28 + * Red Hat Author(s): Behdad Esfahbod
1.29 + * Google Author(s): Behdad Esfahbod
1.30 + */
1.31 +
1.32 +#ifndef HB_OT_HEAD_TABLE_HH
1.33 +#define HB_OT_HEAD_TABLE_HH
1.34 +
1.35 +#include "hb-open-type-private.hh"
1.36 +
1.37 +
1.38 +namespace OT {
1.39 +
1.40 +
1.41 +/*
1.42 + * head -- Font Header
1.43 + */
1.44 +
1.45 +#define HB_OT_TAG_head HB_TAG('h','e','a','d')
1.46 +
1.47 +struct head
1.48 +{
1.49 + static const hb_tag_t tableTag = HB_OT_TAG_head;
1.50 +
1.51 + inline unsigned int get_upem (void) const {
1.52 + unsigned int upem = unitsPerEm;
1.53 + /* If no valid head table found, assume 1000, which matches typical Type1 usage. */
1.54 + return 16 <= upem && upem <= 16384 ? upem : 1000;
1.55 + }
1.56 +
1.57 + inline bool sanitize (hb_sanitize_context_t *c) {
1.58 + TRACE_SANITIZE (this);
1.59 + return TRACE_RETURN (c->check_struct (this) && likely (version.major == 1));
1.60 + }
1.61 +
1.62 + protected:
1.63 + FixedVersion version; /* Version of the head table--currently
1.64 + * 0x00010000 for version 1.0. */
1.65 + FixedVersion fontRevision; /* Set by font manufacturer. */
1.66 + ULONG checkSumAdjustment; /* To compute: set it to 0, sum the
1.67 + * entire font as ULONG, then store
1.68 + * 0xB1B0AFBA - sum. */
1.69 + ULONG magicNumber; /* Set to 0x5F0F3CF5. */
1.70 + USHORT flags; /* Bit 0: Baseline for font at y=0;
1.71 + * Bit 1: Left sidebearing point at x=0;
1.72 + * Bit 2: Instructions may depend on point size;
1.73 + * Bit 3: Force ppem to integer values for all
1.74 + * internal scaler math; may use fractional
1.75 + * ppem sizes if this bit is clear;
1.76 + * Bit 4: Instructions may alter advance width
1.77 + * (the advance widths might not scale linearly);
1.78 +
1.79 + * Bits 5-10: These should be set according to
1.80 + * Apple's specification. However, they are not
1.81 + * implemented in OpenType.
1.82 + * Bit 5: This bit should be set in fonts that are
1.83 + * intended to e laid out vertically, and in
1.84 + * which the glyphs have been drawn such that an
1.85 + * x-coordinate of 0 corresponds to the desired
1.86 + * vertical baseline.
1.87 + * Bit 6: This bit must be set to zero.
1.88 + * Bit 7: This bit should be set if the font
1.89 + * requires layout for correct linguistic
1.90 + * rendering (e.g. Arabic fonts).
1.91 + * Bit 8: This bit should be set for a GX font
1.92 + * which has one or more metamorphosis effects
1.93 + * designated as happening by default.
1.94 + * Bit 9: This bit should be set if the font
1.95 + * contains any strong right-to-left glyphs.
1.96 + * Bit 10: This bit should be set if the font
1.97 + * contains Indic-style rearrangement effects.
1.98 +
1.99 + * Bit 11: Font data is 'lossless,' as a result
1.100 + * of having been compressed and decompressed
1.101 + * with the Agfa MicroType Express engine.
1.102 + * Bit 12: Font converted (produce compatible metrics)
1.103 + * Bit 13: Font optimized for ClearType™.
1.104 + * Note, fonts that rely on embedded bitmaps (EBDT)
1.105 + * for rendering should not be considered optimized
1.106 + * for ClearType, and therefore should keep this bit
1.107 + * cleared.
1.108 + * Bit 14: Last Resort font. If set, indicates that
1.109 + * the glyphs encoded in the cmap subtables are simply
1.110 + * generic symbolic representations of code point
1.111 + * ranges and don’t truly represent support for those
1.112 + * code points. If unset, indicates that the glyphs
1.113 + * encoded in the cmap subtables represent proper
1.114 + * support for those code points.
1.115 + * Bit 15: Reserved, set to 0. */
1.116 + USHORT unitsPerEm; /* Valid range is from 16 to 16384. This value
1.117 + * should be a power of 2 for fonts that have
1.118 + * TrueType outlines. */
1.119 + LONGDATETIME created; /* Number of seconds since 12:00 midnight,
1.120 + January 1, 1904. 64-bit integer */
1.121 + LONGDATETIME modified; /* Number of seconds since 12:00 midnight,
1.122 + January 1, 1904. 64-bit integer */
1.123 + SHORT xMin; /* For all glyph bounding boxes. */
1.124 + SHORT yMin; /* For all glyph bounding boxes. */
1.125 + SHORT xMax; /* For all glyph bounding boxes. */
1.126 + SHORT yMax; /* For all glyph bounding boxes. */
1.127 + USHORT macStyle; /* Bit 0: Bold (if set to 1);
1.128 + * Bit 1: Italic (if set to 1)
1.129 + * Bit 2: Underline (if set to 1)
1.130 + * Bit 3: Outline (if set to 1)
1.131 + * Bit 4: Shadow (if set to 1)
1.132 + * Bit 5: Condensed (if set to 1)
1.133 + * Bit 6: Extended (if set to 1)
1.134 + * Bits 7-15: Reserved (set to 0). */
1.135 + USHORT lowestRecPPEM; /* Smallest readable size in pixels. */
1.136 + SHORT fontDirectionHint; /* Deprecated (Set to 2).
1.137 + * 0: Fully mixed directional glyphs;
1.138 + * 1: Only strongly left to right;
1.139 + * 2: Like 1 but also contains neutrals;
1.140 + * -1: Only strongly right to left;
1.141 + * -2: Like -1 but also contains neutrals. */
1.142 + SHORT indexToLocFormat; /* 0 for short offsets, 1 for long. */
1.143 + SHORT glyphDataFormat; /* 0 for current format. */
1.144 + public:
1.145 + DEFINE_SIZE_STATIC (54);
1.146 +};
1.147 +
1.148 +
1.149 +} /* namespace OT */
1.150 +
1.151 +
1.152 +#endif /* HB_OT_HEAD_TABLE_HH */
