harfbuzz/src/hb-subset.h

/*
 * 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): Rod Sheeter
 */

#ifndef HB_SUBSET_H
#define HB_SUBSET_H

#include "hb.h"

HB_BEGIN_DECLS

/*
 * hb_subset_profile_t
 * Things that change based on target environment, e.g. OS.
 * Threadsafe for multiple concurrent subset operations.
 */

typedef struct hb_subset_profile_t hb_subset_profile_t;

HB_EXTERN hb_subset_profile_t *
hb_subset_profile_create (void);

HB_EXTERN void
hb_subset_profile_destroy (hb_subset_profile_t *profile);

/*
 * hb_subset_input_t
 * Things that change based on the input. Characters to keep, etc.
 */

typedef struct hb_subset_input_t hb_subset_input_t;

HB_EXTERN hb_subset_input_t *
hb_subset_input_create (hb_set_t *codepoints);

HB_EXTERN void
hb_subset_input_destroy (hb_subset_input_t *subset_input);


/* hb_subset() */

HB_EXTERN hb_face_t *
hb_subset (hb_face_t *source,
	   hb_subset_profile_t *profile,
           hb_subset_input_t *input);

HB_END_DECLS

#endif /* HB_SUBSET_H */