src/java.desktop/share/native/libfontmanager/harfbuzz/hb-aat-layout-lcar-table.hh
changeset 54232 7c11a7cc7c1d
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/share/native/libfontmanager/harfbuzz/hb-aat-layout-lcar-table.hh	Fri Mar 01 16:59:19 2019 -0800
@@ -0,0 +1,93 @@
+/*
+ * Copyright © 2018  Ebrahim Byagowi
+ *
+ *  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.
+ */
+#ifndef HB_AAT_LAYOUT_LCAR_TABLE_HH
+#define HB_AAT_LAYOUT_LCAR_TABLE_HH
+
+#include "hb-open-type.hh"
+#include "hb-aat-layout-common.hh"
+
+/*
+ * lcar -- Ligature caret
+ * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6lcar.html
+ */
+#define HB_AAT_TAG_lcar HB_TAG('l','c','a','r')
+
+
+namespace AAT {
+
+typedef ArrayOf<HBINT16> LigCaretClassEntry;
+
+struct lcar
+{
+  static constexpr hb_tag_t tableTag = HB_AAT_TAG_lcar;
+
+  unsigned int get_lig_carets (hb_font_t      *font,
+                               hb_direction_t  direction,
+                               hb_codepoint_t  glyph,
+                               unsigned int    start_offset,
+                               unsigned int   *caret_count /* IN/OUT */,
+                               hb_position_t  *caret_array /* OUT */) const
+  {
+    const OffsetTo<LigCaretClassEntry>* entry_offset = lookup.get_value (glyph,
+                                                                         font->face->get_num_glyphs ());
+    const LigCaretClassEntry& array = entry_offset ? this+*entry_offset : Null (LigCaretClassEntry);
+    if (caret_count)
+    {
+      hb_array_t<const HBINT16> arr = array.sub_array (start_offset, caret_count);
+      unsigned int count = arr.length;
+      for (unsigned int i = 0; i < count; ++i)
+        switch (format)
+        {
+        case 0: caret_array[i] = font->em_scale_dir (arr[i], direction); break;
+        case 1:
+          hb_position_t x, y;
+          font->get_glyph_contour_point_for_origin (glyph, arr[i], direction, &x, &y);
+          caret_array[i] = HB_DIRECTION_IS_HORIZONTAL (direction) ? x : y;
+          break;
+        }
+    }
+    return array.len;
+  }
+
+  bool sanitize (hb_sanitize_context_t *c) const
+  {
+    TRACE_SANITIZE (this);
+    return_trace (likely (c->check_struct (this) &&
+                          version.major == 1 &&
+                          lookup.sanitize (c, this)));
+  }
+
+  protected:
+  FixedVersion<>version;        /* Version number of the ligature caret table */
+  HBUINT16      format;         /* Format of the ligature caret table. */
+  Lookup<OffsetTo<LigCaretClassEntry> >
+                lookup;         /* data Lookup table associating glyphs */
+
+  public:
+  DEFINE_SIZE_MIN (8);
+};
+
+} /* namespace AAT */
+
+#endif /* HB_AAT_LAYOUT_LCAR_TABLE_HH */