harfbuzz: check in harfbuzz-ng, add gyp define to use it

third_party/harfbuzz-ng/src/hb-ot-head-private.hh

+/*
+ * Copyright (C) 2010  Red Hat, 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
+ */
+
+#ifndef HB_OT_HEAD_PRIVATE_HH
+#define HB_OT_HEAD_PRIVATE_HH
+
+#include "hb-open-type-private.hh"
+
+HB_BEGIN_DECLS
+
+
+/*
+ * head
+ */
+
+#define HB_OT_TAG_head HB_TAG('h','e','a','d')
+
+struct head
+{
+  static const hb_tag_t Tag     = 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 typicaly Type1 usage. */
+    return 16 <= upem && upem <= 16384 ? upem : 1000;
+  }
+
+  inline bool sanitize (hb_sanitize_context_t *c) {
+    TRACE_SANITIZE ();
+    /* Shall we check for magicNumber here?  Who cares? */
+    return c->check_struct (this) && likely (version.major == 1);
+  }
+
+  private:
+  FixedVersion  version;                /* Version of the head table--currently
+                                         * 0x00010000 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
+                                         * 0xB1B0AFBA - sum. */
+  ULONG         magicNumber;            /* Set to 0x5F0F3CF5. */
+  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);
+};
+
+
+HB_END_DECLS
+
+#endif /* HB_OT_HEAD_PRIVATE_HH */