[ot-font] Start implementing 'post' table, for accessing glyph names

src/Makefile.sources

@@ -28,6 +28,7 @@ HB_BASE_sources = \
 	hb-ot-maxp-table.hh \
 	hb-ot-name-table.hh \
 	hb-ot-os2-table.hh \
+	hb-ot-post-table.hh \
 	hb-ot-tag.cc \
 	hb-private.hh \
 	hb-set-private.hh \

src/hb-open-type-private.hh

@@ -101,7 +101,8 @@ static inline Type& StructAfter(TObject &X)
 #define DEFINE_SIZE_STATIC(size) \
   DEFINE_INSTANCE_ASSERTION (sizeof (*this) == (size)); \
   static const unsigned int static_size = (size); \
-  static const unsigned int min_size = (size)
+  static const unsigned int min_size = (size); \
+  inline unsigned int get_size (void) const { return (size); }
 
 #define DEFINE_SIZE_UNION(size, _member) \
   DEFINE_INSTANCE_ASSERTION (this->u._member.static_size == (size)); \
@@ -671,6 +672,15 @@ struct F2DOT14 : SHORT
   DEFINE_SIZE_STATIC (2);
 };
 
+/* 32-bit signed fixed-point number (16.16). */
+struct Fixed: LONG
+{
+  //inline float to_float (void) const { return ???; }
+  //inline void set_float (float f) { v.set (f * ???); }
+  public:
+  DEFINE_SIZE_STATIC (4);
+};
+
 /* Date represented in number of seconds since 12:00 midnight, January 1,
  * 1904. The value is represented as a signed 64-bit integer. */
 struct LONGDATETIME

src/hb-ot-font.cc

@@ -36,6 +36,7 @@
 #include "hb-ot-hhea-table.hh"
 #include "hb-ot-hmtx-table.hh"
 #include "hb-ot-os2-table.hh"
+#include "hb-ot-post-table.hh"
 
 
 struct hb_ot_face_metrics_accelerator_t

src/hb-ot-post-table.hh

@@ -0,0 +1,119 @@
+/*
+ * Copyright © 2016  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.
+ *
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_OT_POST_TABLE_HH
+#define HB_OT_POST_TABLE_HH
+
+#include "hb-open-type-private.hh"
+
+
+namespace OT {
+
+
+/*
+ * post -- PostScript
+ */
+
+#define HB_OT_TAG_post HB_TAG('p','o','s','t')
+
+
+struct postV2Tail
+{
+  inline bool sanitize (hb_sanitize_context_t *c) const
+  {
+    TRACE_SANITIZE (this);
+    return_trace (numberOfGlyphs.sanitize (c) &&
+		  c->check_array (glyphNameIndex, sizeof (USHORT), numberOfGlyphs));
+  }
+
+  USHORT	numberOfGlyphs;		/* Number of glyphs (this should be the
+					 * same as numGlyphs in 'maxp' table). */
+  USHORT	glyphNameIndex[VAR];	/* This is not an offset, but is the
+					 * ordinal number of the glyph in 'post'
+					 * string tables. */
+  BYTE		namesX[VAR];		/* Glyph names with length bytes [variable]
+					 * (a Pascal string). */
+
+  DEFINE_SIZE_ARRAY2 (2, glyphNameIndex, namesX);
+};
+
+struct post
+{
+  static const hb_tag_t tableTag = HB_OT_TAG_post;
+
+  inline bool sanitize (hb_sanitize_context_t *c) const
+  {
+    TRACE_SANITIZE (this);
+    if (unlikely (!c->check_struct (this)))
+      return_trace (false);
+    if (version.to_int () == 0x00020000)
+    {
+      const postV2Tail &v2 = StructAfter<postV2Tail>(*this);
+      return_trace (v2.sanitize (c));
+    }
+    return_trace (true);
+  }
+
+  public:
+  FixedVersion<>version;		/* 0x00010000 for version 1.0
+					 * 0x00020000 for version 2.0
+					 * 0x00025000 for version 2.5 (deprecated)
+					 * 0x00030000 for version 3.0 */
+  Fixed		italicAngle;		/* Italic angle in counter-clockwise degrees
+					 * from the vertical. Zero for upright text,
+					 * negative for text that leans to the right
+					 * (forward). */
+  FWORD		underlinePosition;	/* This is the suggested distance of the top
+					 * of the underline from the baseline
+					 * (negative values indicate below baseline).
+					 * The PostScript definition of this FontInfo
+					 * dictionary key (the y coordinate of the
+					 * center of the stroke) is not used for
+					 * historical reasons. The value of the
+					 * PostScript key may be calculated by
+					 * subtracting half the underlineThickness
+					 * from the value of this field. */
+  FWORD		underlineThickness;	/* Suggested values for the underline
+					   thickness. */
+  ULONG		isFixedPitch;		/* Set to 0 if the font is proportionally
+					 * spaced, non-zero if the font is not
+					 * proportionally spaced (i.e. monospaced). */
+  ULONG		minMemType42;		/* Minimum memory usage when an OpenType font
+					 * is downloaded. */
+  ULONG		maxMemType42;		/* Maximum memory usage when an OpenType font
+					 * is downloaded. */
+  ULONG		minMemType1;		/* Minimum memory usage when an OpenType font
+					 * is downloaded as a Type 1 font. */
+  ULONG		maxMemType1;		/* Maximum memory usage when an OpenType font
+					 * is downloaded as a Type 1 font. */
+/*postV2Tail	v2[VAR];*/
+  DEFINE_SIZE_STATIC (32);
+};
+
+} /* namespace OT */
+
+
+#endif /* HB_OT_POST_TABLE_HH */