1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/harfbuzz/src/hb-blob.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,127 @@
1.4 +/*
1.5 + * Copyright © 2009 Red Hat, Inc.
1.6 + *
1.7 + * This is part of HarfBuzz, a text shaping library.
1.8 + *
1.9 + * Permission is hereby granted, without written agreement and without
1.10 + * license or royalty fees, to use, copy, modify, and distribute this
1.11 + * software and its documentation for any purpose, provided that the
1.12 + * above copyright notice and the following two paragraphs appear in
1.13 + * all copies of this software.
1.14 + *
1.15 + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
1.16 + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
1.17 + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
1.18 + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
1.19 + * DAMAGE.
1.20 + *
1.21 + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
1.22 + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
1.23 + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
1.24 + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
1.25 + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
1.26 + *
1.27 + * Red Hat Author(s): Behdad Esfahbod
1.28 + */
1.29 +
1.30 +#ifndef HB_H_IN
1.31 +#error "Include <hb.h> instead."
1.32 +#endif
1.33 +
1.34 +#ifndef HB_BLOB_H
1.35 +#define HB_BLOB_H
1.36 +
1.37 +#include "hb-common.h"
1.38 +
1.39 +HB_BEGIN_DECLS
1.40 +
1.41 +
1.42 +/*
1.43 + * Note re various memory-modes:
1.44 + *
1.45 + * - In no case shall the HarfBuzz client modify memory
1.46 + * that is passed to HarfBuzz in a blob. If there is
1.47 + * any such possibility, MODE_DUPLICATE should be used
1.48 + * such that HarfBuzz makes a copy immediately,
1.49 + *
1.50 + * - Use MODE_READONLY otherse, unless you really really
1.51 + * really know what you are doing,
1.52 + *
1.53 + * - MODE_WRITABLE is appropriate if you relaly made a
1.54 + * copy of data solely for the purpose of passing to
1.55 + * HarfBuzz and doing that just once (no reuse!),
1.56 + *
1.57 + * - If the font is mmap()ed, it's ok to use
1.58 + * READONLY_MAY_MAKE_WRITABLE, however, there were
1.59 + * design problems with that mode, so HarfBuzz do not
1.60 + * really use it anymore. If not sure, use MODE_READONLY.
1.61 + */
1.62 +typedef enum {
1.63 + HB_MEMORY_MODE_DUPLICATE,
1.64 + HB_MEMORY_MODE_READONLY,
1.65 + HB_MEMORY_MODE_WRITABLE,
1.66 + HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE
1.67 +} hb_memory_mode_t;
1.68 +
1.69 +typedef struct hb_blob_t hb_blob_t;
1.70 +
1.71 +hb_blob_t *
1.72 +hb_blob_create (const char *data,
1.73 + unsigned int length,
1.74 + hb_memory_mode_t mode,
1.75 + void *user_data,
1.76 + hb_destroy_func_t destroy);
1.77 +
1.78 +/* Always creates with MEMORY_MODE_READONLY.
1.79 + * Even if the parent blob is writable, we don't
1.80 + * want the user of the sub-blob to be able to
1.81 + * modify the parent data as that data may be
1.82 + * shared among multiple sub-blobs.
1.83 + */
1.84 +hb_blob_t *
1.85 +hb_blob_create_sub_blob (hb_blob_t *parent,
1.86 + unsigned int offset,
1.87 + unsigned int length);
1.88 +
1.89 +hb_blob_t *
1.90 +hb_blob_get_empty (void);
1.91 +
1.92 +hb_blob_t *
1.93 +hb_blob_reference (hb_blob_t *blob);
1.94 +
1.95 +void
1.96 +hb_blob_destroy (hb_blob_t *blob);
1.97 +
1.98 +hb_bool_t
1.99 +hb_blob_set_user_data (hb_blob_t *blob,
1.100 + hb_user_data_key_t *key,
1.101 + void * data,
1.102 + hb_destroy_func_t destroy,
1.103 + hb_bool_t replace);
1.104 +
1.105 +
1.106 +void *
1.107 +hb_blob_get_user_data (hb_blob_t *blob,
1.108 + hb_user_data_key_t *key);
1.109 +
1.110 +
1.111 +void
1.112 +hb_blob_make_immutable (hb_blob_t *blob);
1.113 +
1.114 +hb_bool_t
1.115 +hb_blob_is_immutable (hb_blob_t *blob);
1.116 +
1.117 +
1.118 +unsigned int
1.119 +hb_blob_get_length (hb_blob_t *blob);
1.120 +
1.121 +const char *
1.122 +hb_blob_get_data (hb_blob_t *blob, unsigned int *length);
1.123 +
1.124 +char *
1.125 +hb_blob_get_data_writable (hb_blob_t *blob, unsigned int *length);
1.126 +
1.127 +
1.128 +HB_END_DECLS
1.129 +
1.130 +#endif /* HB_BLOB_H */
