tor-browser

hb-glib.cc (6053B)

---

/*
* 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)
{
 return g_unichar_compose (a, b, ab);
}

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)
{
 return g_unichar_decompose (ab, a, b);
}


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