From 80fd5743200cbe221ae3adf057fe0e5ef54a894c Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Wed, 10 Jan 2018 11:09:53 +0100
Subject: [PATCH] [aat] Add Class subtable thingy

From old 'mort' table.
---
 src/hb-aat-layout-common-private.hh | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/hb-aat-layout-common-private.hh b/src/hb-aat-layout-common-private.hh
index c3058682d..4b96ee6c9 100644
--- a/src/hb-aat-layout-common-private.hh
+++ b/src/hb-aat-layout-common-private.hh
@@ -424,6 +424,30 @@ struct Lookup
 };
 
 
+struct Class
+{
+  inline unsigned int get_class (hb_codepoint_t glyph_id) const
+  {
+    return firstGlyph <= glyph_id && glyph_id - firstGlyph < glyphCount ? classArrayZ[glyph_id - firstGlyph] : 1;
+  }
+
+  inline bool sanitize (hb_sanitize_context_t *c) const
+  {
+    TRACE_SANITIZE (this);
+    return_trace (c->check_struct (this) && classArrayZ.sanitize (c, glyphCount));
+  }
+
+  protected:
+  GlyphID	firstGlyph;	/* First glyph index included in the trimmed array. */
+  HBUINT16	glyphCount;	/* Total number of glyphs (equivalent to the last
+				 * glyph minus the value of firstGlyph plus 1). */
+  UnsizedArrayOf<HBUINT8>
+		classArrayZ;	/* The class codes (indexed by glyph index minus
+				 * firstGlyph). */
+  public:
+  DEFINE_SIZE_ARRAY (4, classArrayZ);
+};
+
 } /* namespace AAT */