Pango-1.21.4 released [unstable]

[Behdad Esfahbod <behdad behdad org>]

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Pango-1.21.4 is now available for download at:

  http://download.gnome.org/sources/pango/1.21/
or
  ftp://ftp.gtk.org/pub/pango/1.21

75f8dea346a160f8f45c47cd30e6ab3b  pango-1.21.4.tar.bz2
3a12cb5a7f2dc562aab415d764810f4e  pango-1.21.4.tar.gz

I figured Vincent is at Akademy busy distracting the KDE folks from
hacking, so I thought I may sneak in some last-minute API additions
while he's not paying attention.  All the additions are pretty
straightforward.  The more complex ones (supporting application fonts)
did not make it this time around and so are pushed forward for the next
Pango stable series :(.

Notes:

 * 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-1.20.x

 * Bugs should be reported to http://bugzilla.gnome.org.

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 (http://cairographics.org)
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 http://www.pango.org/.
Bugs should be reported to http://bugzilla.gnome.org.

Pango 1.21.4 depends on version 2.17.3 or newer of the GLib
library and version 1.7.4 or newer of the cairo library (if the
cairo backend is desired); more information about GLib and cairo
can be found at http://www.gtk.org/ and http://cairographics.org/
respectively.

Overview of changes between 1.21.3 and 1.21.4
=============================================
- - Use cairo_show_text_glyphs() if target cairo surface supports that.
  This is done by adding a new PangoRenderer method, draw_glyph_item().
  Custom PangoRenderer implementations that delegate to pango_cairo
  may want to implement this method if they target PDF files.
- - Requires cairo >= 1.7.4 now
- - Win32 build improvements
- - Justify lines broken by U+2028 LINE SEPARATOR
- - Various small fixes and improvements
- - New API additions:

	New public API:

		PangoRenderer::draw_glyph_item()
		pango_renderer_draw_glyph_item()

	Make layout and layout-line default renderers go through
	draw_glyph_item(), which then by default falls back to
	draw_glyphs().  The advantage in draw_glyph_item() is that it
	has access to the text and cluster information.

	New public API, for iterating a PangoGlyphItem:

		PangoGlyphItemIter
		PANGO_TYPE_GLYPH_ITEM_ITER
		pango_glyph_item_iter_copy()
		pango_glyph_item_iter_free()
		pango_glyph_item_iter_init_start()
		pango_glyph_item_iter_init_end()
		pango_glyph_item_iter_next_cluster()
		pango_glyph_item_iter_prev_cluster()

	Make the following previously backend-only API public:

		pango_context_new()
		pango_context_set_font_map()

	This also means that bindings are recommended to allow
	instantiation of pango.Context.  This was discouraged before.

	New public API:

		pango_font_map_create_context()
	
	This is equivalent to pango_context_new() followed by an
	immediate pango_context_set_font_map().  This change also
	deprecates various per-fontmap-type context constructors:

	Deprecate pango_cairo_font_map_create_context().
	Deprecate pango_fc_font_map_create_context().
	Deprecate pango_ft2_font_map_create_context().
	Deprecate pango_win32_get_context().
	Deprecate pango_xft_get_context().
	Deprecate pango_x_get_context().

	Language bindings are encouraged to bind
	pango.Fontmap.create_context() and remove the create_context()
	method from subclass implementations.


- - Bugs fixed in this release:
	Bug 547303 – pango_layout_get_cursor_pos crashes on certain text
		buffers
	Fedora Bug 457883 - Sindhi Characters are not supported in
		pango [U+097B-U+097F]
		Patch from Pravin Satpute
	Bug 441654 – prefix fails when more than one base characters (as
		conjuncts) present after a half form the next prefix renders
		incorrectly
		Patch from  Rahul Bhalerao
	Bug 546534 – pango_cairo_font_map_set_default(NULL) errs
	Bug 431394 – Use pango_glyph_item_iter in more places
	Bug 377948 – Make pango_glyph_item_iter public
	Bug 472625 – Add draw_glyph_item() to PangoRenderer
	Bug 540592 – Crash in HB_GSUB_Apply_String with Linux-Libertine font
	Bug 540036 – Doesn't link to fontconfig
	Bug 380094 – Fix split matra rendering bug for Kannada language
	Bug 536017 – Remove SF_MPRE_FIXUP from Sinhala script flags
		Patch by Harshula

11 August 2008
Behdad Esfahbod
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