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| 1 /* | |
| 2 * Copyright (C) 2010 Red Hat, Inc. | |
| 3 * | |
| 4 * This is part of HarfBuzz, a text shaping library. | |
| 5 * | |
| 6 * Permission is hereby granted, without written agreement and without | |
| 7 * license or royalty fees, to use, copy, modify, and distribute this | |
| 8 * software and its documentation for any purpose, provided that the | |
| 9 * above copyright notice and the following two paragraphs appear in | |
| 10 * all copies of this software. | |
| 11 * | |
| 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR | |
| 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES | |
| 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN | |
| 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH | |
| 16 * DAMAGE. | |
| 17 * | |
| 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, | |
| 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS | |
| 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO | |
| 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. | |
| 23 * | |
| 24 * Red Hat Author(s): Behdad Esfahbod | |
| 25 */ | |
| 26 | |
| 27 #ifndef HB_OT_HEAD_PRIVATE_HH | |
| 28 #define HB_OT_HEAD_PRIVATE_HH | |
| 29 | |
| 30 #include "hb-open-type-private.hh" | |
| 31 | |
| 32 HB_BEGIN_DECLS | |
| 33 | |
| 34 | |
| 35 /* | |
| 36 * head | |
| 37 */ | |
| 38 | |
| 39 #define HB_OT_TAG_head HB_TAG('h','e','a','d') | |
| 40 | |
| 41 struct head | |
| 42 { | |
| 43 static const hb_tag_t Tag = HB_OT_TAG_head; | |
| 44 | |
| 45 inline unsigned int get_upem (void) const { | |
| 46 unsigned int upem = unitsPerEm; | |
| 47 /* If no valid head table found, assume 1000, which matches typicaly Type1 u
sage. */ | |
| 48 return 16 <= upem && upem <= 16384 ? upem : 1000; | |
| 49 } | |
| 50 | |
| 51 inline bool sanitize (hb_sanitize_context_t *c) { | |
| 52 TRACE_SANITIZE (); | |
| 53 /* Shall we check for magicNumber here? Who cares? */ | |
| 54 return c->check_struct (this) && likely (version.major == 1); | |
| 55 } | |
| 56 | |
| 57 private: | |
| 58 FixedVersion version; /* Version of the head table--currently | |
| 59 * 0x00010000 for version 1.0. */ | |
| 60 FixedVersion fontRevision; /* Set by font manufacturer. */ | |
| 61 ULONG checkSumAdjustment; /* To compute: set it to 0, sum the | |
| 62 * entire font as ULONG, then store | |
| 63 * 0xB1B0AFBA - sum. */ | |
| 64 ULONG magicNumber; /* Set to 0x5F0F3CF5. */ | |
| 65 USHORT flags; /* Bit 0: Baseline for font at y=0; | |
| 66 * Bit 1: Left sidebearing point at x=0; | |
| 67 * Bit 2: Instructions may depend on poi
nt size; | |
| 68 * Bit 3: Force ppem to integer values f
or all | |
| 69 * internal scaler math; may use fract
ional | |
| 70 * ppem sizes if this bit is clear; | |
| 71 * Bit 4: Instructions may alter advance
width | |
| 72 * (the advance widths might not scale
linearly); | |
| 73 | |
| 74 * Bits 5-10: These should be set accord
ing to | |
| 75 * Apple's specification. However, the
y are not | |
| 76 * implemented in OpenType. | |
| 77 * Bit 5: This bit should be set in font
s that are | |
| 78 * intended to e laid out vertically,
and in | |
| 79 * which the glyphs have been drawn su
ch that an | |
| 80 * x-coordinate of 0 corresponds to th
e desired | |
| 81 * vertical baseline. | |
| 82 * Bit 6: This bit must be set to zero. | |
| 83 * Bit 7: This bit should be set if the
font | |
| 84 * requires layout for correct linguis
tic | |
| 85 * rendering (e.g. Arabic fonts). | |
| 86 * Bit 8: This bit should be set for a G
X font | |
| 87 * which has one or more metamorphosis
effects | |
| 88 * designated as happening by default. | |
| 89 * Bit 9: This bit should be set if the
font | |
| 90 * contains any strong right-to-left g
lyphs. | |
| 91 * Bit 10: This bit should be set if the
font | |
| 92 * contains Indic-style rearrangement
effects. | |
| 93 | |
| 94 * Bit 11: Font data is 'lossless,' as a
result | |
| 95 * of having been compressed and decom
pressed | |
| 96 * with the Agfa MicroType Express eng
ine. | |
| 97 * Bit 12: Font converted (produce compa
tible metrics) | |
| 98 * Bit 13: Font optimized for ClearType™
. | |
| 99 * Note, fonts that rely on embedded b
itmaps (EBDT) | |
| 100 * for rendering should not be conside
red optimized | |
| 101 * for ClearType, and therefore should
keep this bit | |
| 102 * cleared. | |
| 103 * Bit 14: Last Resort font. If set, ind
icates that | |
| 104 * the glyphs encoded in the cmap subtab
les are simply | |
| 105 * generic symbolic representations of c
ode point | |
| 106 * ranges and don’t truly represent supp
ort for those | |
| 107 * code points. If unset, indicates that
the glyphs | |
| 108 * encoded in the cmap subtables represe
nt proper | |
| 109 * support for those code points. | |
| 110 * Bit 15: Reserved, set to 0. */ | |
| 111 USHORT unitsPerEm; /* Valid range is from 16 to 16384. This
value | |
| 112 * should be a power of 2 for fonts that
have | |
| 113 * TrueType outlines. */ | |
| 114 LONGDATETIME created; /* Number of seconds since 12:00 midnigh
t, | |
| 115 January 1, 1904. 64-bit integer */ | |
| 116 LONGDATETIME modified; /* Number of seconds since 12:00 midnigh
t, | |
| 117 January 1, 1904. 64-bit integer */ | |
| 118 SHORT xMin; /* For all glyph bounding boxes. */ | |
| 119 SHORT yMin; /* For all glyph bounding boxes. */ | |
| 120 SHORT xMax; /* For all glyph bounding boxes. */ | |
| 121 SHORT yMax; /* For all glyph bounding boxes. */ | |
| 122 USHORT macStyle; /* Bit 0: Bold (if set to 1); | |
| 123 * Bit 1: Italic (if set to 1) | |
| 124 * Bit 2: Underline (if set to 1) | |
| 125 * Bit 3: Outline (if set to 1) | |
| 126 * Bit 4: Shadow (if set to 1) | |
| 127 * Bit 5: Condensed (if set to 1) | |
| 128 * Bit 6: Extended (if set to 1) | |
| 129 * Bits 7-15: Reserved (set to 0). */ | |
| 130 USHORT lowestRecPPEM; /* Smallest readable size in pixels. */ | |
| 131 SHORT fontDirectionHint; /* Deprecated (Set to 2). | |
| 132 * 0: Fully mixed directional glyphs; | |
| 133 * 1: Only strongly left to right; | |
| 134 * 2: Like 1 but also contains neutrals; | |
| 135 * -1: Only strongly right to left; | |
| 136 * -2: Like -1 but also contains neutral
s. */ | |
| 137 SHORT indexToLocFormat; /* 0 for short offsets, 1 for long. */ | |
| 138 SHORT glyphDataFormat; /* 0 for current format. */ | |
| 139 public: | |
| 140 DEFINE_SIZE_STATIC (54); | |
| 141 }; | |
| 142 | |
| 143 | |
| 144 HB_END_DECLS | |
| 145 | |
| 146 #endif /* HB_OT_HEAD_PRIVATE_HH */ | |
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Chromium Code Reviews
Issue 9223010:
Update harfbuzz-ng to 1a5a91dc0d8bf4b72a2f22dc6300b06ad7000b79. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src