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-/*
- * Copyright © 2010 Red Hat, Inc.
- * Copyright © 2012 Google, Inc.
- *
- * This is part of HarfBuzz, a text shaping library.
- *
- * Permission is hereby granted, without written agreement and without
- * license or royalty fees, to use, copy, modify, and distribute this
- * software and its documentation for any purpose, provided that the
- * above copyright notice and the following two paragraphs appear in
- * all copies of this software.
- *
- * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
- * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
- * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
- * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- *
- * Red Hat Author(s): Behdad Esfahbod
- * Google Author(s): Behdad Esfahbod
- */
-
-#ifndef HB_OT_HEAD_TABLE_HH
-#define HB_OT_HEAD_TABLE_HH
-
-#include "hb-open-type-private.hh"
-
-
-namespace OT {
-
-
-/*
- * head -- Font Header
- */
-
-#define HB_OT_TAG_head HB_TAG('h','e','a','d')
-
-struct head
-{
- static const hb_tag_t tableTag = HB_OT_TAG_head;
-
- inline unsigned int get_upem (void) const {
- unsigned int upem = unitsPerEm;
- /* If no valid head table found, assume 1000, which matches typical Type1 usage. */
- return 16 <= upem && upem <= 16384 ? upem : 1000;
- }
-
- inline bool sanitize (hb_sanitize_context_t *c) {
- TRACE_SANITIZE (this);
- return TRACE_RETURN (c->check_struct (this) && likely (version.major == 1));
- }
-
- protected:
- FixedVersion version; /* Version of the head table--currently
- * 0x00010000u for version 1.0. */
- FixedVersion fontRevision; /* Set by font manufacturer. */
- ULONG checkSumAdjustment; /* To compute: set it to 0, sum the
- * entire font as ULONG, then store
- * 0xB1B0AFBAu - sum. */
- ULONG magicNumber; /* Set to 0x5F0F3CF5u. */
- USHORT flags; /* Bit 0: Baseline for font at y=0;
- * Bit 1: Left sidebearing point at x=0;
- * Bit 2: Instructions may depend on point size;
- * Bit 3: Force ppem to integer values for all
- * internal scaler math; may use fractional
- * ppem sizes if this bit is clear;
- * Bit 4: Instructions may alter advance width
- * (the advance widths might not scale linearly);
-
- * Bits 5-10: These should be set according to
- * Apple's specification. However, they are not
- * implemented in OpenType.
- * Bit 5: This bit should be set in fonts that are
- * intended to e laid out vertically, and in
- * which the glyphs have been drawn such that an
- * x-coordinate of 0 corresponds to the desired
- * vertical baseline.
- * Bit 6: This bit must be set to zero.
- * Bit 7: This bit should be set if the font
- * requires layout for correct linguistic
- * rendering (e.g. Arabic fonts).
- * Bit 8: This bit should be set for a GX font
- * which has one or more metamorphosis effects
- * designated as happening by default.
- * Bit 9: This bit should be set if the font
- * contains any strong right-to-left glyphs.
- * Bit 10: This bit should be set if the font
- * contains Indic-style rearrangement effects.
-
- * Bit 11: Font data is 'lossless,' as a result
- * of having been compressed and decompressed
- * with the Agfa MicroType Express engine.
- * Bit 12: Font converted (produce compatible metrics)
- * Bit 13: Font optimized for ClearType™.
- * Note, fonts that rely on embedded bitmaps (EBDT)
- * for rendering should not be considered optimized
- * for ClearType, and therefore should keep this bit
- * cleared.
- * Bit 14: Last Resort font. If set, indicates that
- * the glyphs encoded in the cmap subtables are simply
- * generic symbolic representations of code point
- * ranges and don’t truly represent support for those
- * code points. If unset, indicates that the glyphs
- * encoded in the cmap subtables represent proper
- * support for those code points.
- * Bit 15: Reserved, set to 0. */
- USHORT unitsPerEm; /* Valid range is from 16 to 16384. This value
- * should be a power of 2 for fonts that have
- * TrueType outlines. */
- LONGDATETIME created; /* Number of seconds since 12:00 midnight,
- January 1, 1904. 64-bit integer */
- LONGDATETIME modified; /* Number of seconds since 12:00 midnight,
- January 1, 1904. 64-bit integer */
- SHORT xMin; /* For all glyph bounding boxes. */
- SHORT yMin; /* For all glyph bounding boxes. */
- SHORT xMax; /* For all glyph bounding boxes. */
- SHORT yMax; /* For all glyph bounding boxes. */
- USHORT macStyle; /* Bit 0: Bold (if set to 1);
- * Bit 1: Italic (if set to 1)
- * Bit 2: Underline (if set to 1)
- * Bit 3: Outline (if set to 1)
- * Bit 4: Shadow (if set to 1)
- * Bit 5: Condensed (if set to 1)
- * Bit 6: Extended (if set to 1)
- * Bits 7-15: Reserved (set to 0). */
- USHORT lowestRecPPEM; /* Smallest readable size in pixels. */
- SHORT fontDirectionHint; /* Deprecated (Set to 2).
- * 0: Fully mixed directional glyphs;
- * 1: Only strongly left to right;
- * 2: Like 1 but also contains neutrals;
- * -1: Only strongly right to left;
- * -2: Like -1 but also contains neutrals. */
- SHORT indexToLocFormat; /* 0 for short offsets, 1 for long. */
- SHORT glyphDataFormat; /* 0 for current format. */
- public:
- DEFINE_SIZE_STATIC (54);
-};
-
-
-} /* namespace OT */
-
-
-#endif /* HB_OT_HEAD_TABLE_HH */