Pango-1.15.1 released [unstable]

Pango-1.15.1 is now available for download at:

bb24f4fd3d303e84827f852b38a682f7  pango-1.15.1.tar.bz2
3d2bd774728c11728e15ba429c67e6d5  pango-1.15.1.tar.gz

This is a development release leading up to Pango-1.16.0, which
will be released just in time for GNOME-2.18.


 * This is unstable development release. While it has had
   fairly extensive testing, there are likely bugs
   remaining to be found. This release should not be used
   in production.

 * Installing this version will overwrite your existing
   copy of Pango. If you have problems, you'll need
   to reinstall Pango-1.14.x

 * Bugs should be reported to

About Pango

Pango is a library for layout and rendering of text, with an emphasis
on internationalization. Pango can be used anywhere that text layout
is needed, though most of the work on Pango so far has been done in
the context of the GTK+ widget toolkit. Pango forms the core of text
and font handling for GTK+-2.x.

Pango is designed to be modular; the core Pango layout engine can
be used with different font backends. There are three basic backends,
with multiple options for rendering with each.

 - Client side fonts using the FreeType and fontconfig libraries.
   Rendering can be with with Cairo or Xft libraries, or directly
   to an in-memory buffer with no additional libraries.

 - Native fonts on Microsoft Windows using Uniscribe for
   complex-text handling. Rendering can be done via Cairo or
   directly using the native Win32 API.

 - Native fonts on MacOS X, rendering via Cairo.

The integration of Pango with Cairo (
provides a complete solution with high quality text handling
and graphics rendering.

Dynamically loaded modules then handle text layout for particular
combinations of script and font backend. Pango ships with a wide
selection of modules, including modules for Hebrew, Arabic,
Hangul, Thai, and a number of Indic scripts. Virtually all of the
world's major scripts are supported.

As well as the low level layout rendering routines, Pango includes
PangoLayout, a high level driver for laying out entire blocks of text,
and routines to assist in editing internationalized text.

More information about Pango is available from
Bugs should be reported to

Pango 1.15 depends on version 2.12.0 or newer of the GLib
library and version 1.2.2 or newer of the cairo library (if the
cairo backend is desired); more information about GLib and cairo
can be found at and

Overview of changes between 1.15.0 and 1.15.1
* Add Thai langauage engine. (currently makes tests/testboundary fail.)
* Add Lao and improved Thai sample text.
* Improved Indic module.
* Output correct path for hexboxes in pango_cairo_layout_path().
* Implement get_resolution method for the FT2 fontmap.  Shouldn't make
  any difference whatsoever.  Open a bug if it does.
* Misc small fixes.

* Optimizations:
  - Rework PangoLayout algorithms to avoid calling a recursive call to
    pango_layout_get_extents().  Avoids one pango_font_get_glyph_extents()
    call per glyph per layout rendering.  We now make 2 such calls.
  - Don't cache run_logical_rect in PangoLayoutIter.
    Avoids one pango_font_get_glyph_extents() call per glyph per layout
    rendering.  We are down to 1 now.
  - Cache line extents.  This avoids the final pango_font_get_glyph_extents()
    call per glyph per layout rendering.  Now we don't make any
    pango_font_get_glyph_extents() calls when rendering a layout (some
    conditions apply)!
    internal uses, that is, just a NULL-check.
  - Use simple, fast, casts instead of PANGO_CAIRO_*() macros where the
    object cannot have reached us if it wasn't of the right type.

* Bugs fixed in this release:
	Bug 135683 – Cache glyphstring extents
	Red Hat Bug 211964: [ta] Rendering issue with Tamil
		Patch from LingNing Zhang
	Red Hat Bug 213632: ZWJ (200d) and ZWNJ (200c) showing same output
		Patch from LingNing Zhang
	Bug 371388 – Add Thai langauage engine
		Patch from Theppitak Karoonboonyanan
	Bug 377975 – bug in _pango_glyph_item_iter_next_cluster
	Bug 369670 – Checked g_free calls

Changes that also appeared between 1.14.7 and 1.14.8
* Improved thread-safety.  Pango is still NOT thread-safe, but this fixes
  lots of crashes using pangocairo from multiple threads.
* Fix out-of-bounds array access.
* Improved Indic shaper.
* Improved Arabic language engine.
* Choose shaper/font for unassigned Unicode codepoints.
* Build fixes.
* Bugs fixed in this release:
	Bug 356666 – pango is not thread-safe, nautilus does not honour that
	Bug 352795 – Bug in "checking Whether to write
	             dependencies into .pc files"
	Bug 350132 – backspacing doesn't work properly for Arabic
	Bug 330407 – Multiple dependant vowel signs (indic) displayed as one
	Patch from LingNing Zhang

Behdad Esfahbod
04 December 2006

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