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54 lines
1.7 KiB
Plaintext
54 lines
1.7 KiB
Plaintext
Purpose
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=======
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This extension is basically a wrapper for the FriBidi implementation
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of the Unicode Bidi algorithm. The need for such an algorithm rises
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from the bidirectional language usage done by applications.
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Arabic/Hebrew embedded within English is such a case.
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Usage
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=====
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The only function used is fribidi_log2vis (logical to visual).
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Input: 1) The Logical string.
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2) Base direction of application - 'L' or 'R'.
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3) The char code being used, which can be one of the following
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constants:
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a) FRIBIDI_CHARSET_UTF8
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b) FRIBIDI_CHARSET_8859_6
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c) FRIBIDI_CHARSET_8859_8
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d) FRIBIDI_CHARSET_CP1255
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e) FRIBIDI_CHARSET_CP1256
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f) FRIBIDI_CHARSET_ISIRI_3342
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Note: Currently, FriBidi supports the above Character Codes alone.
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Output: A Visual string.
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Compiling
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===========
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1) Static - ./configure --with-fribidi=base-directory-of-FriBidi-installation-path
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(defaults to /usr/local).
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2) dl - same, just add shared, to get .... --with-fribidi=shared,base....
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Prerequisites
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=============
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1) FriBidi version 0.9.0 or later must be installed. Latest version can be obtained thru
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http://fribidi.sourceforge.net/
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2) glib header files: glib.h and glibconfig.h.
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Note
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=====
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The function fribidi_log2vis computes three more arrays which are currently not passed back as output.
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These arrays are:
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1) mapping from the logical to the visual sting.
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2) mapping from the visual to the logical string.
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3) embedding level of characters as figured out by the FriBidi algorithm.
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The extension needs further implementation to support this.
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p.s. - If you don't understand this, you probably don't need it.
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