[subset] Sketch out a basic hb-ot-hdmx.hh.

src/Makefile.sources

@@ -20,6 +20,7 @@ HB_BASE_sources = \
 	hb-ot-cbdt-table.hh \
 	hb-ot-cmap-table.hh \
 	hb-ot-glyf-table.hh \
+	hb-ot-hdmx-table.hh \
 	hb-ot-head-table.hh \
 	hb-ot-hhea-table.hh \
 	hb-ot-hmtx-table.hh \

src/hb-ot-hdmx-table.hh

@@ -0,0 +1,77 @@
+/*
+ * Copyright © 2018  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): Garret Rieger
+ */
+
+#ifndef HB_OT_HDMX_TABLE_HH
+#define HB_OT_HDMX_TABLE_HH
+
+#include "hb-open-type-private.hh"
+
+namespace OT {
+
+#define HB_OT_TAG_hdmx HB_TAG('h','d','m','x')
+
+
+struct DeviceRecord
+{
+  HBUINT8 pixel_size;
+  HBUINT8 max_width;
+  HBUINT8 widths[VAR];
+};
+
+struct hdmx
+{
+  inline unsigned int get_size (void) const
+  {
+    return min_size + num_records * size_device_record;
+  }
+
+  inline const DeviceRecord& operator [] (unsigned int i) const
+  {
+    if (unlikely (i >= num_records)) return Null(DeviceRecord);
+    return StructAtOffset<DeviceRecord> (this, min_size + i * size_device_record);
+  }
+
+  inline bool sanitize (hb_sanitize_context_t *c) const
+  {
+    TRACE_SANITIZE (this);
+    return_trace (likely (c->check_struct (this)
+                          && version == 0));
+  }
+
+  HBUINT16 version;
+  HBINT16  num_records;
+  HBINT32  size_device_record;
+
+  DeviceRecord records[VAR];
+
+  DEFINE_SIZE_MIN (8);
+
+};
+
+} /* namespace OT */
+
+
+#endif /* HB_OT_HDMX_TABLE_HH */

src/hb-subset.cc

@@ -35,6 +35,7 @@
 #include "hb-open-file-private.hh"
 #include "hb-ot-cmap-table.hh"
 #include "hb-ot-glyf-table.hh"
+#include "hb-ot-hdmx-table.hh"
 #include "hb-ot-head-table.hh"
 #include "hb-ot-hhea-table.hh"
 #include "hb-ot-hmtx-table.hh"