Add Harfbuzz dependency

modules/juce_graphics/fonts/harfbuzz/hb-glib.cc

@@ -0,0 +1,232 @@
+/*
+ * Copyright © 2009  Red Hat, Inc.
+ * Copyright © 2011  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.
+ *
+ * Red Hat Author(s): Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#include "hb.hh"
+
+#ifdef HAVE_GLIB
+
+#include "hb-glib.h"
+
+#include "hb-machinery.hh"
+
+
+/**
+ * SECTION:hb-glib
+ * @title: hb-glib
+ * @short_description: GLib integration
+ * @include: hb-glib.h
+ *
+ * Functions for using HarfBuzz with the GLib library.
+ *
+ * HarfBuzz supports using GLib to provide Unicode data, by attaching
+ * GLib functions to the virtual methods in a #hb_unicode_funcs_t function
+ * structure.
+ **/
+
+
+/**
+ * hb_glib_script_to_script:
+ * @script: The GUnicodeScript identifier to query
+ *
+ * Fetches the #hb_script_t script that corresponds to the
+ * specified GUnicodeScript identifier.
+ *
+ * Return value: the #hb_script_t script found
+ *
+ * Since: 0.9.38
+ **/
+hb_script_t
+hb_glib_script_to_script (GUnicodeScript script)
+{
+  return (hb_script_t) g_unicode_script_to_iso15924 (script);
+}
+
+/**
+ * hb_glib_script_from_script:
+ * @script: The #hb_script_t to query
+ *
+ * Fetches the GUnicodeScript identifier that corresponds to the
+ * specified #hb_script_t script.
+ *
+ * Return value: the GUnicodeScript identifier found
+ *
+ * Since: 0.9.38
+ **/
+GUnicodeScript
+hb_glib_script_from_script (hb_script_t script)
+{
+  return g_unicode_script_from_iso15924 (script);
+}
+
+
+static hb_unicode_combining_class_t
+hb_glib_unicode_combining_class (hb_unicode_funcs_t *ufuncs HB_UNUSED,
+				 hb_codepoint_t      unicode,
+				 void               *user_data HB_UNUSED)
+
+{
+  return (hb_unicode_combining_class_t) g_unichar_combining_class (unicode);
+}
+
+static hb_unicode_general_category_t
+hb_glib_unicode_general_category (hb_unicode_funcs_t *ufuncs HB_UNUSED,
+				  hb_codepoint_t      unicode,
+				  void               *user_data HB_UNUSED)
+
+{
+  /* hb_unicode_general_category_t and GUnicodeType are identical */
+  return (hb_unicode_general_category_t) g_unichar_type (unicode);
+}
+
+static hb_codepoint_t
+hb_glib_unicode_mirroring (hb_unicode_funcs_t *ufuncs HB_UNUSED,
+			   hb_codepoint_t      unicode,
+			   void               *user_data HB_UNUSED)
+{
+  g_unichar_get_mirror_char (unicode, &unicode);
+  return unicode;
+}
+
+static hb_script_t
+hb_glib_unicode_script (hb_unicode_funcs_t *ufuncs HB_UNUSED,
+			hb_codepoint_t      unicode,
+			void               *user_data HB_UNUSED)
+{
+  return hb_glib_script_to_script (g_unichar_get_script (unicode));
+}
+
+static hb_bool_t
+hb_glib_unicode_compose (hb_unicode_funcs_t *ufuncs HB_UNUSED,
+			 hb_codepoint_t      a,
+			 hb_codepoint_t      b,
+			 hb_codepoint_t     *ab,
+			 void               *user_data HB_UNUSED)
+{
+#if GLIB_CHECK_VERSION(2,29,12)
+  return g_unichar_compose (a, b, ab);
+#else
+  return false;
+#endif
+}
+
+static hb_bool_t
+hb_glib_unicode_decompose (hb_unicode_funcs_t *ufuncs HB_UNUSED,
+			   hb_codepoint_t      ab,
+			   hb_codepoint_t     *a,
+			   hb_codepoint_t     *b,
+			   void               *user_data HB_UNUSED)
+{
+#if GLIB_CHECK_VERSION(2,29,12)
+  return g_unichar_decompose (ab, a, b);
+#else
+  return false;
+#endif
+}
+
+
+static inline void free_static_glib_funcs ();
+
+static struct hb_glib_unicode_funcs_lazy_loader_t : hb_unicode_funcs_lazy_loader_t<hb_glib_unicode_funcs_lazy_loader_t>
+{
+  static hb_unicode_funcs_t *create ()
+  {
+    hb_unicode_funcs_t *funcs = hb_unicode_funcs_create (nullptr);
+
+    hb_unicode_funcs_set_combining_class_func (funcs, hb_glib_unicode_combining_class, nullptr, nullptr);
+    hb_unicode_funcs_set_general_category_func (funcs, hb_glib_unicode_general_category, nullptr, nullptr);
+    hb_unicode_funcs_set_mirroring_func (funcs, hb_glib_unicode_mirroring, nullptr, nullptr);
+    hb_unicode_funcs_set_script_func (funcs, hb_glib_unicode_script, nullptr, nullptr);
+    hb_unicode_funcs_set_compose_func (funcs, hb_glib_unicode_compose, nullptr, nullptr);
+    hb_unicode_funcs_set_decompose_func (funcs, hb_glib_unicode_decompose, nullptr, nullptr);
+
+    hb_unicode_funcs_make_immutable (funcs);
+
+    hb_atexit (free_static_glib_funcs);
+
+    return funcs;
+  }
+} static_glib_funcs;
+
+static inline
+void free_static_glib_funcs ()
+{
+  static_glib_funcs.free_instance ();
+}
+
+/**
+ * hb_glib_get_unicode_funcs:
+ *
+ * Fetches a Unicode-functions structure that is populated
+ * with the appropriate GLib function for each method.
+ *
+ * Return value: (transfer none): a pointer to the #hb_unicode_funcs_t Unicode-functions structure
+ *
+ * Since: 0.9.38
+ **/
+hb_unicode_funcs_t *
+hb_glib_get_unicode_funcs ()
+{
+  return static_glib_funcs.get_unconst ();
+}
+
+
+
+#if GLIB_CHECK_VERSION(2,31,10)
+
+static void
+_hb_g_bytes_unref (void *data)
+{
+  g_bytes_unref ((GBytes *) data);
+}
+
+/**
+ * hb_glib_blob_create:
+ * @gbytes: the GBytes structure to work upon
+ *
+ * Creates an #hb_blob_t blob from the specified
+ * GBytes data structure.
+ *
+ * Return value: (transfer full): the new #hb_blob_t blob object
+ *
+ * Since: 0.9.38
+ **/
+hb_blob_t *
+hb_glib_blob_create (GBytes *gbytes)
+{
+  gsize size = 0;
+  gconstpointer data = g_bytes_get_data (gbytes, &size);
+  return hb_blob_create ((const char *) data,
+			 size,
+			 HB_MEMORY_MODE_READONLY,
+			 g_bytes_ref (gbytes),
+			 _hb_g_bytes_unref);
+}
+#endif
+
+
+#endif