Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 129 insertions, 0 deletions

diff --git a/gfx/harfbuzz/src/hb-ot-meta-table.hh b/gfx/harfbuzz/src/hb-ot-meta-table.hh
new file mode 100644
index 0000000000..e1b68bcf91
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-ot-meta-table.hh
@@ -0,0 +1,129 @@
+/*
+ * Copyright © 2019  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_OT_META_TABLE_HH
+#define HB_OT_META_TABLE_HH
+
+#include "hb-open-type.hh"
+
+/*
+ * meta -- Metadata Table
+ * https://docs.microsoft.com/en-us/typography/opentype/spec/meta
+ * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6meta.html
+ */
+#define HB_OT_TAG_meta HB_TAG ('m','e','t','a')
+
+
+namespace OT {
+
+
+struct DataMap
+{
+  int cmp (hb_tag_t a) const { return tag.cmp (a); }
+
+  hb_tag_t get_tag () const { return tag; }
+
+  hb_blob_t *reference_entry (hb_blob_t *meta_blob) const
+  { return hb_blob_create_sub_blob (meta_blob, dataZ, dataLength); }
+
+  bool sanitize (hb_sanitize_context_t *c, const void *base) const
+  {
+    TRACE_SANITIZE (this);
+    return_trace (likely (c->check_struct (this) &&
+			  dataZ.sanitize (c, base, dataLength)));
+  }
+
+  protected:
+  Tag		tag;		/* A tag indicating the type of metadata. */
+  NNOffset32To<UnsizedArrayOf<HBUINT8>>
+		dataZ;		/* Offset in bytes from the beginning of the
+				 * metadata table to the data for this tag. */
+  HBUINT32	dataLength;	/* Length of the data. The data is not required to
+				 * be padded to any byte boundary. */
+  public:
+  DEFINE_SIZE_STATIC (12);
+};
+
+struct meta
+{
+  static constexpr hb_tag_t tableTag = HB_OT_TAG_meta;
+
+  struct accelerator_t
+  {
+    accelerator_t (hb_face_t *face)
+    { table = hb_sanitize_context_t ().reference_table<meta> (face); }
+    ~accelerator_t () { table.destroy (); }
+
+    hb_blob_t *reference_entry (hb_tag_t tag) const
+    { return table->dataMaps.lsearch (tag).reference_entry (table.get_blob ()); }
+
+    unsigned int get_entries (unsigned int      start_offset,
+			      unsigned int     *count,
+			      hb_ot_meta_tag_t *entries) const
+    {
+      if (count)
+      {
+	+ table->dataMaps.as_array ().sub_array (start_offset, count)
+	| hb_map (&DataMap::get_tag)
+	| hb_map ([](hb_tag_t tag) { return (hb_ot_meta_tag_t) tag; })
+	| hb_sink (hb_array (entries, *count))
+	;
+      }
+      return table->dataMaps.len;
+    }
+
+    private:
+    hb_blob_ptr_t<meta> table;
+  };
+
+  bool sanitize (hb_sanitize_context_t *c) const
+  {
+    TRACE_SANITIZE (this);
+    return_trace (likely (c->check_struct (this) &&
+			  version == 1 &&
+			  dataMaps.sanitize (c, this)));
+  }
+
+  protected:
+  HBUINT32	version;	/* Version number of the metadata table — set to 1. */
+  HBUINT32	flags;		/* Flags — currently unused; set to 0. */
+  HBUINT32	dataOffset;
+				/* Per Apple specification:
+				 * Offset from the beginning of the table to the data.
+				 * Per OT specification:
+				 * Reserved. Not used; should be set to 0. */
+  Array32Of<DataMap>
+		dataMaps;/* Array of data map records. */
+  public:
+  DEFINE_SIZE_ARRAY (16, dataMaps);
+};
+
+struct meta_accelerator_t : meta::accelerator_t {
+  meta_accelerator_t (hb_face_t *face) : meta::accelerator_t (face) {}
+};
+
+} /* namespace OT */
+
+
+#endif /* HB_OT_META_TABLE_HH */