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fribidi_log2vis(3) Programmer's Manual fribidi_log2vis(3)

fribidi_log2vis - get visual string

#include <fribidi.h>

FriBidiLevel fribidi_log2vis
(
const FriBidiChar *str,
const FriBidiStrIndex len,
FriBidiParType *pbase_dir,
FriBidiChar *visual_str,
FriBidiStrIndex *positions_L_to_V,
FriBidiStrIndex *positions_V_to_L,
FriBidiLevel *embedding_levels
);

const FriBidiChar *str
Input logical string.
const FriBidiStrIndex len
Input string length.
FriBidiParType *pbase_dir
Requested and resolved paragraph base direction.

Possible values for a FriBidiParType are as follows:

FRIBIDI_PAR_LTR
Left-To-Right paragraph.
FRIBIDI_PAR_RTL
Right-To-Left paragraph.
FRIBIDI_PAR_ON
DirectiOn-Neutral paragraph.
FRIBIDI_PAR_WLTR
Weak Left To Right paragraph.
FRIBIDI_PAR_WRTL
Weak Right To Left paragraph.
FriBidiChar *visual_str
Output visual string.
FriBidiStrIndex *positions_L_to_V
Output mapping from logical to visual string positions.
FriBidiStrIndex *positions_V_to_L
Output mapping from visual string back to the logical string positions.
FriBidiLevel *embedding_levels
Output list of embedding levels.

This function converts the logical input string to the visual output strings as specified by the Unicode Bidirectional Algorithm. As a side effect it also generates mapping lists between the two strings, and the list of embedding levels as defined by the algorithm.

If NULL is passed as any of the the lists, the list is ignored and not filled.

Note that this function handles one-line paragraphs. For multi- paragraph texts it is necessary to first split the text into separate paragraphs and then carry over the resolved pbase_dir between the subsequent invocations.

Maximum level found plus one, or zero if any error occurred (memory allocation failure most probably).

fribidi_shape_arabic(3), fribidi_get_par_direction(3), fribidi_get_par_embedding_levels_ex(3), fribidi_reorder_line(3), fribidi_get_bidi_type(3), fribidi_get_bidi_types(3), fribidi_get_bidi_type_name(3), fribidi_debug_status(3), fribidi_set_debug(3), fribidi_charset_to_unicode(3), fribidi_unicode_to_charset(3), fribidi_parse_charset(3), fribidi_mirroring_status(3), fribidi_set_mirroring(3), fribidi_reorder_nsm_status(3), fribidi_set_reorder_nsm(3), fribidi_log2vis_get_embedding_levels(3), fribidi_get_type(3), fribidi_get_type_internal(3), fribidi_get_par_embedding_levels(3), fribidi_join_arabic(3), fribidi_get_joining_type(3), fribidi_get_joining_types(3), fribidi_get_joining_type_name(3), fribidi_get_mirror_char(3), fribidi_shape_mirroring(3), fribidi_get_bracket(3), fribidi_get_bracket_types(3), fribidi_shape(3), fribidi_remove_bidi_marks(3)
23 September 2021 c2man fribidi.h

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