Add a basic sketch of hb-subset-plan.

src/Makefile.sources

@@ -184,10 +184,12 @@ HB_ICU_headers = hb-icu.h
 # Sources for libharfbuzz-subset
 HB_SUBSET_sources = \
 	hb-subset.cc \
+	hb-subset-plan.cc \
 	$(NULL)
 
 HB_SUBSET_headers = \
 	hb-subset.h \
+	hb-subset-plan.h \
 	$(NULL)
 
 HB_GOBJECT_sources = hb-gobject-structs.cc

src/hb-subset-plan.cc

@@ -0,0 +1,72 @@
+/*
+ * 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
+ */
+
+#include "hb-private.hh"
+
+#include "hb-object-private.hh"
+
+
+struct hb_subset_plan_t {
+  hb_object_header_t header;
+  ASSERT_POD ();
+};
+
+/**
+ * hb_subset_plan_create:
+ * Computes a plan for subsetting the supplied face according
+ * to a provide profile and input. The plan describes
+ * which tables and glyphs should be retained.
+ *
+ * Return value: New plan with default settings.
+ *
+ * Since: 1.7.5
+ **/
+hb_subset_plan_t *
+hb_subset_plan_create (hb_face_t           *face,
+                       hb_subset_profile_t *profile,
+                       hb_subset_input_t   *input)
+{
+  return hb_object_create<hb_subset_plan_t>();
+}
+
+hb_subset_plan_t *
+hb_subset_plan_create_empty ()
+{
+  return hb_object_create<hb_subset_plan_t>();
+}
+
+/**
+ * hb_subset_plan_destroy:
+ *
+ * Since: 1.7.5
+ **/
+void
+hb_subset_plan_destroy (hb_subset_plan_t *plan)
+{
+  if (!hb_object_destroy (plan)) return;
+
+  free (plan);
+}

src/hb-subset-plan.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright © 2018  Google
+ *
+ *  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_H_IN
+#error "Include <hb.h> instead."
+#endif
+
+#ifndef HB_SUBSET_PLAN_H
+#define HB_SUBSET_PLAN_H
+
+HB_BEGIN_DECLS
+
+typedef struct hb_subset_plan_t hb_subset_plan_t;
+
+HB_EXTERN hb_subset_plan_t *
+hb_subset_plan_create (hb_face_t           *face,
+                       hb_subset_profile_t *profile,
+                       hb_subset_input_t   *input);
+
+HB_EXTERN hb_subset_plan_t *
+hb_subset_plan_create_empty ();
+
+HB_EXTERN void
+hb_subset_plan_destroy (hb_subset_plan_t *plan);
+
+#endif /* HB_SUBSET_PLAN_PRIVATE_HH */