Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+# Graphite engine
+
+## Project CI status
+| OS      | Intel 64 bit | Intel 32 bit | Arm 32 bit |
+|---------|:------------:|:------------:|:----------:|
+| Linux   | [![Build Status](http://build.palaso.org/app/rest/builds/buildType:bt124/statusIcon)](http://build.palaso.org/viewType.html?buildTypeId=bt124&guest=1) | [![Build Status](http://build.palaso.org/app/rest/builds/buildType:bt123/statusIcon)](http://build.palaso.org/viewType.html?buildTypeId=bt123&guest=1) | [![Build Status](http://build.palaso.org/app/rest/builds/buildType:Graphite_Linux32bitArm/statusIcon)](http://build.palaso.org/viewType.html?buildTypeId=Graphite_Linux32bitArm&guest=1) |
+| Windows | [![Build Status](http://build.palaso.org/app/rest/builds/buildType:Graphite_Windows64bit/statusIcon)](http://build.palaso.org/viewType.html?buildTypeId=Graphite_Windows64bit&guest=1) | [![Build Status](http://build.palaso.org/app/rest/builds/buildType:bt91/statusIcon)](http://build.palaso.org/viewType.html?buildTypeId=bt91&guest=1)| |
+
+## What is Graphite?
+
+Graphite is a system that can be used to create “smart fonts” capable of displaying writing systems with various complex behaviors. A smart font contains not only letter shapes but also additional instructions indicating how to combine and position the letters in complex ways.
+
+Graphite was primarily developed to provide the flexibility needed for minority languages which often need to be written according to slightly different rules than well-known languages that use the same script.
+
+Examples of complex script behaviors Graphite can handle include:
+
+* contextual shaping
+* ligatures
+* reordering
+* split glyphs
+* bidirectionality
+* stacking diacritics
+* complex positioning
+* shape aware kerning
+* automatic diacritic collision avoidance
+
+See [examples of scripts with complex rendering](http://scripts.sil.org/CmplxRndExamples).
+
+## Graphite system overview
+The Graphite system consists of:
+
+* A rule-based programming language [Graphite Description Language](http://scripts.sil.org/cms/scripts/page.php?site_id=projects&item_id=graphite_devFont#gdl) (GDL) that can be used to describe the behavior of a writing system
+* A compiler for that language
+* A rendering engine that can serve as the layout component of a text-processing application
+
+Graphite renders TrueType fonts that have been extended by means of compiling a GDL program.
+
+Further technical information is available on the [Graphite technical overview](http://scripts.sil.org/cms/scripts/page.php?site_id=projects&item_id=graphite_techAbout) page.