127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/*
|
|
* Copyright © 2009 Red Hat, 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
|
|
*/
|
|
|
|
#ifndef HB_H_IN
|
|
#error "Include <hb.h> instead."
|
|
#endif
|
|
|
|
#ifndef HB_BLOB_H
|
|
#define HB_BLOB_H
|
|
|
|
#include "hb-common.h"
|
|
|
|
HB_BEGIN_DECLS
|
|
|
|
|
|
/*
|
|
* 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,
|
|
*
|
|
* - Use MODE_READONLY otherse, unless you really really
|
|
* really know what you are doing,
|
|
*
|
|
* - 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
|
|
* READONLY_MAY_MAKE_WRITABLE, however, using that mode
|
|
* correctly is very tricky. Use MODE_READONLY instead.
|
|
*/
|
|
typedef enum {
|
|
HB_MEMORY_MODE_DUPLICATE,
|
|
HB_MEMORY_MODE_READONLY,
|
|
HB_MEMORY_MODE_WRITABLE,
|
|
HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE
|
|
} hb_memory_mode_t;
|
|
|
|
typedef struct hb_blob_t hb_blob_t;
|
|
|
|
HB_EXTERN hb_blob_t *
|
|
hb_blob_create (const char *data,
|
|
unsigned int length,
|
|
hb_memory_mode_t mode,
|
|
void *user_data,
|
|
hb_destroy_func_t destroy);
|
|
|
|
/* 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 *
|
|
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);
|
|
|
|
HB_EXTERN hb_blob_t *
|
|
hb_blob_reference (hb_blob_t *blob);
|
|
|
|
HB_EXTERN void
|
|
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
|
|
hb_blob_make_immutable (hb_blob_t *blob);
|
|
|
|
HB_EXTERN hb_bool_t
|
|
hb_blob_is_immutable (hb_blob_t *blob);
|
|
|
|
|
|
HB_EXTERN unsigned int
|
|
hb_blob_get_length (hb_blob_t *blob);
|
|
|
|
HB_EXTERN const char *
|
|
hb_blob_get_data (hb_blob_t *blob, unsigned int *length);
|
|
|
|
HB_EXTERN char *
|
|
hb_blob_get_data_writable (hb_blob_t *blob, unsigned int *length);
|
|
|
|
|
|
HB_END_DECLS
|
|
|
|
#endif /* HB_BLOB_H */
|