harfbuzz/src/hb-blob.h

127 lines
3.5 KiB
C
Raw Normal View History

2009-07-30 21:33:57 +02:00
/*
2011-04-21 23:14:28 +02:00
* Copyright © 2009 Red Hat, Inc.
2009-07-30 21:33:57 +02:00
*
2010-04-22 06:11:43 +02:00
* This is part of HarfBuzz, a text shaping library.
2009-07-30 21:33:57 +02:00
*
* 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
*/
#ifndef HB_H_IN
#error "Include <hb.h> instead."
#endif
2009-07-30 21:33:57 +02:00
#ifndef HB_BLOB_H
#define HB_BLOB_H
#include "hb-common.h"
HB_BEGIN_DECLS
2010-07-23 21:11:18 +02:00
/*
* Note re various memory-modes:
*
* - In no case shall the HarfBuzz client modify memory
* that is passed to HarfBuzz in a blob. If there is
* any such possibility, MODE_DUPLICATE should be used
* such that HarfBuzz makes a copy immediately,
*
2018-01-21 14:40:34 +01:00
* - Use MODE_READONLY otherwise, unless you really really
* really know what you are doing,
*
2014-04-09 02:32:08 +02:00
* - MODE_WRITABLE is appropriate if you really made a
* copy of data solely for the purpose of passing to
* HarfBuzz and doing that just once (no reuse!),
*
* - If the font is mmap()ed, it's ok to use
2014-05-14 03:06:39 +02:00
* READONLY_MAY_MAKE_WRITABLE, however, using that mode
* correctly is very tricky. Use MODE_READONLY instead.
*/
typedef enum {
2009-07-30 21:33:57 +02:00
HB_MEMORY_MODE_DUPLICATE,
HB_MEMORY_MODE_READONLY,
2009-08-19 22:17:24 +02:00
HB_MEMORY_MODE_WRITABLE,
HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE
2009-07-30 21:33:57 +02:00
} hb_memory_mode_t;
typedef struct hb_blob_t hb_blob_t;
2009-08-02 03:38:39 +02:00
HB_EXTERN hb_blob_t *
2009-07-30 21:33:57 +02:00
hb_blob_create (const char *data,
2009-08-03 23:53:29 +02:00
unsigned int length,
2009-07-30 21:33:57 +02:00
hb_memory_mode_t mode,
void *user_data,
hb_destroy_func_t destroy);
2009-07-30 21:33:57 +02:00
/* Always creates with MEMORY_MODE_READONLY.
* Even if the parent blob is writable, we don't
* want the user of the sub-blob to be able to
* modify the parent data as that data may be
* shared among multiple sub-blobs.
*/
HB_EXTERN hb_blob_t *
2009-08-03 23:53:29 +02:00
hb_blob_create_sub_blob (hb_blob_t *parent,
unsigned int offset,
unsigned int length);
HB_EXTERN hb_blob_t *
hb_blob_get_empty (void);
2009-08-03 23:53:29 +02:00
HB_EXTERN hb_blob_t *
2009-07-30 21:33:57 +02:00
hb_blob_reference (hb_blob_t *blob);
HB_EXTERN void
2009-07-30 21:33:57 +02:00
hb_blob_destroy (hb_blob_t *blob);
HB_EXTERN hb_bool_t
hb_blob_set_user_data (hb_blob_t *blob,
hb_user_data_key_t *key,
void * data,
hb_destroy_func_t destroy,
hb_bool_t replace);
HB_EXTERN void *
hb_blob_get_user_data (hb_blob_t *blob,
hb_user_data_key_t *key);
HB_EXTERN void
2011-05-07 04:28:26 +02:00
hb_blob_make_immutable (hb_blob_t *blob);
HB_EXTERN hb_bool_t
2011-05-07 04:28:26 +02:00
hb_blob_is_immutable (hb_blob_t *blob);
HB_EXTERN unsigned int
2009-08-04 03:27:08 +02:00
hb_blob_get_length (hb_blob_t *blob);
HB_EXTERN const char *
2011-05-07 04:28:26 +02:00
hb_blob_get_data (hb_blob_t *blob, unsigned int *length);
2009-08-04 03:27:08 +02:00
HB_EXTERN char *
2011-05-07 04:28:26 +02:00
hb_blob_get_data_writable (hb_blob_t *blob, unsigned int *length);
2009-07-30 21:33:57 +02:00
2010-07-23 21:11:18 +02:00
2009-07-30 21:33:57 +02:00
HB_END_DECLS
#endif /* HB_BLOB_H */