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comparison: gfx/harfbuzz/src/hb-ot-head-table.hh
gfx/harfbuzz/src/hb-ot-head-table.hh
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- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:4cc5ea614def |
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| 1 /* | |
| 2 * Copyright © 2010 Red Hat, Inc. | |
| 3 * Copyright © 2012 Google, Inc. | |
| 4 * | |
| 5 * This is part of HarfBuzz, a text shaping library. | |
| 6 * | |
| 7 * Permission is hereby granted, without written agreement and without | |
| 8 * license or royalty fees, to use, copy, modify, and distribute this | |
| 9 * software and its documentation for any purpose, provided that the | |
| 10 * above copyright notice and the following two paragraphs appear in | |
| 11 * all copies of this software. | |
| 12 * | |
| 13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR | |
| 14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES | |
| 15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN | |
| 16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH | |
| 17 * DAMAGE. | |
| 18 * | |
| 19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, | |
| 20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS | |
| 22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO | |
| 23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. | |
| 24 * | |
| 25 * Red Hat Author(s): Behdad Esfahbod | |
| 26 * Google Author(s): Behdad Esfahbod | |
| 27 */ | |
| 28 | |
| 29 #ifndef HB_OT_HEAD_TABLE_HH | |
| 30 #define HB_OT_HEAD_TABLE_HH | |
| 31 | |
| 32 #include "hb-open-type-private.hh" | |
| 33 | |
| 34 | |
| 35 namespace OT { | |
| 36 | |
| 37 | |
| 38 /* | |
| 39 * head -- Font Header | |
| 40 */ | |
| 41 | |
| 42 #define HB_OT_TAG_head HB_TAG('h','e','a','d') | |
| 43 | |
| 44 struct head | |
| 45 { | |
| 46 static const hb_tag_t tableTag = HB_OT_TAG_head; | |
| 47 | |
| 48 inline unsigned int get_upem (void) const { | |
| 49 unsigned int upem = unitsPerEm; | |
| 50 /* If no valid head table found, assume 1000, which matches typical Type1 usage. */ | |
| 51 return 16 <= upem && upem <= 16384 ? upem : 1000; | |
| 52 } | |
| 53 | |
| 54 inline bool sanitize (hb_sanitize_context_t *c) { | |
| 55 TRACE_SANITIZE (this); | |
| 56 return TRACE_RETURN (c->check_struct (this) && likely (version.major == 1)); | |
| 57 } | |
| 58 | |
| 59 protected: | |
| 60 FixedVersion version; /* Version of the head table--currently | |
| 61 * 0x00010000 for version 1.0. */ | |
| 62 FixedVersion fontRevision; /* Set by font manufacturer. */ | |
| 63 ULONG checkSumAdjustment; /* To compute: set it to 0, sum the | |
| 64 * entire font as ULONG, then store | |
| 65 * 0xB1B0AFBA - sum. */ | |
| 66 ULONG magicNumber; /* Set to 0x5F0F3CF5. */ | |
| 67 USHORT flags; /* Bit 0: Baseline for font at y=0; | |
| 68 * Bit 1: Left sidebearing point at x=0; | |
| 69 * Bit 2: Instructions may depend on point size; | |
| 70 * Bit 3: Force ppem to integer values for all | |
| 71 * internal scaler math; may use fractional | |
| 72 * ppem sizes if this bit is clear; | |
| 73 * Bit 4: Instructions may alter advance width | |
| 74 * (the advance widths might not scale linearly); | |
| 75 | |
| 76 * Bits 5-10: These should be set according to | |
| 77 * Apple's specification. However, they are not | |
| 78 * implemented in OpenType. | |
| 79 * Bit 5: This bit should be set in fonts that are | |
| 80 * intended to e laid out vertically, and in | |
| 81 * which the glyphs have been drawn such that an | |
| 82 * x-coordinate of 0 corresponds to the desired | |
| 83 * vertical baseline. | |
| 84 * Bit 6: This bit must be set to zero. | |
| 85 * Bit 7: This bit should be set if the font | |
| 86 * requires layout for correct linguistic | |
| 87 * rendering (e.g. Arabic fonts). | |
| 88 * Bit 8: This bit should be set for a GX font | |
| 89 * which has one or more metamorphosis effects | |
| 90 * designated as happening by default. | |
| 91 * Bit 9: This bit should be set if the font | |
| 92 * contains any strong right-to-left glyphs. | |
| 93 * Bit 10: This bit should be set if the font | |
| 94 * contains Indic-style rearrangement effects. | |
| 95 | |
| 96 * Bit 11: Font data is 'lossless,' as a result | |
| 97 * of having been compressed and decompressed | |
| 98 * with the Agfa MicroType Express engine. | |
| 99 * Bit 12: Font converted (produce compatible metrics) | |
| 100 * Bit 13: Font optimized for ClearType™. | |
| 101 * Note, fonts that rely on embedded bitmaps (EBDT) | |
| 102 * for rendering should not be considered optimized | |
| 103 * for ClearType, and therefore should keep this bit | |
| 104 * cleared. | |
| 105 * Bit 14: Last Resort font. If set, indicates that | |
| 106 * the glyphs encoded in the cmap subtables are simply | |
| 107 * generic symbolic representations of code point | |
| 108 * ranges and don’t truly represent support for those | |
| 109 * code points. If unset, indicates that the glyphs | |
| 110 * encoded in the cmap subtables represent proper | |
| 111 * support for those code points. | |
| 112 * Bit 15: Reserved, set to 0. */ | |
| 113 USHORT unitsPerEm; /* Valid range is from 16 to 16384. This value | |
| 114 * should be a power of 2 for fonts that have | |
| 115 * TrueType outlines. */ | |
| 116 LONGDATETIME created; /* Number of seconds since 12:00 midnight, | |
| 117 January 1, 1904. 64-bit integer */ | |
| 118 LONGDATETIME modified; /* Number of seconds since 12:00 midnight, | |
| 119 January 1, 1904. 64-bit integer */ | |
| 120 SHORT xMin; /* For all glyph bounding boxes. */ | |
| 121 SHORT yMin; /* For all glyph bounding boxes. */ | |
| 122 SHORT xMax; /* For all glyph bounding boxes. */ | |
| 123 SHORT yMax; /* For all glyph bounding boxes. */ | |
| 124 USHORT macStyle; /* Bit 0: Bold (if set to 1); | |
| 125 * Bit 1: Italic (if set to 1) | |
| 126 * Bit 2: Underline (if set to 1) | |
| 127 * Bit 3: Outline (if set to 1) | |
| 128 * Bit 4: Shadow (if set to 1) | |
| 129 * Bit 5: Condensed (if set to 1) | |
| 130 * Bit 6: Extended (if set to 1) | |
| 131 * Bits 7-15: Reserved (set to 0). */ | |
| 132 USHORT lowestRecPPEM; /* Smallest readable size in pixels. */ | |
| 133 SHORT fontDirectionHint; /* Deprecated (Set to 2). | |
| 134 * 0: Fully mixed directional glyphs; | |
| 135 * 1: Only strongly left to right; | |
| 136 * 2: Like 1 but also contains neutrals; | |
| 137 * -1: Only strongly right to left; | |
| 138 * -2: Like -1 but also contains neutrals. */ | |
| 139 SHORT indexToLocFormat; /* 0 for short offsets, 1 for long. */ | |
| 140 SHORT glyphDataFormat; /* 0 for current format. */ | |
| 141 public: | |
| 142 DEFINE_SIZE_STATIC (54); | |
| 143 }; | |
| 144 | |
| 145 | |
| 146 } /* namespace OT */ | |
| 147 | |
| 148 | |
| 149 #endif /* HB_OT_HEAD_TABLE_HH */ |
