65 lines
2.6 KiB
Markdown
65 lines
2.6 KiB
Markdown
Pango
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=====
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Pango is a library for layout and rendering of text, with an emphasis
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on internationalization. Pango can be used anywhere that text layout
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is needed; however, most of the work on Pango so far has been done using
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the GTK widget toolkit as a test platform. Pango forms the core of text
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and font handling for GTK.
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Pango is designed to be modular; the core Pango layout can be used
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with different font backends. There are three basic backends, with
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multiple options for rendering with each.
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- Client-side fonts using the FreeType and FontConfig libraries.
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Rendering can be with with Cairo or Xft libraries, or directly
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to an in-memory buffer with no additional libraries.
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- Native fonts on Microsoft Windows. Rendering can be done via Cairo
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or directly using the native Win32 API.
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- Native fonts on MacOS X with the CoreText framework, rendering via
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Cairo.
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The integration of Pango with [Cairo](https://cairographics.org)
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provides a complete solution with high quality text handling and
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graphics rendering.
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As well as the low level layout rendering routines, Pango includes
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PangoLayout, a high level driver for laying out entire blocks of text,
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and routines to assist in editing internationalized text.
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For more information about Pango, see:
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https://www.pango.org/
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Dependencies
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------------
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Pango depends on the GLib library; more information about GLib can
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be found at https://www.gtk.org/.
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To use the Free Software stack backend, Pango depends on the following
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libraries:
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- [FontConfig](https://www.fontconfig.org) for font discovery,
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- [FreeType](https://www.freetype.org) for font access,
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- [HarfBuzz](http://www.harfbuzz.org) for complex text shaping
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- [fribidi](http://fribidi.org) for bidirectional text handling
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Cairo support depends on the [Cairo](https://cairographics.org) library.
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The Cairo backend is the preferred backend to use Pango with and is
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subject of most of the development in the future. It has the
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advantage that the same code can be used for display and printing.
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We suggest using Pango with Cairo as described above, but you can also
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do X-specific rendering using the Xft library. The Xft backend uses
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version 2 of the Xft library to manage client side fonts. Version 2 of
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Xft is available from https://xlibs.freedesktop.org/release/. You'll
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need the libXft package, and possibly the libXrender and renderext
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packages as well. You'll also need FontConfig.
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Installation of Pango on Win32 is possible, see README.win32.
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License
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-------
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Most of the code of Pango is licensed under the terms of the
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GNU Lesser Public License (LGPL) - see the file COPYING for details.
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