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Moonlight, an open source implementation of Silverlight for Unix systems
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build Put the thread implementations in separate files. May 6, 2011
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cairo [Build] Fix make dist Mar 8, 2011
class Revert "put these back.." May 23, 2011
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examples [OSX] Implement the initial PAL backend for native rendering on OSX Nov 4, 2010
gallium Make sure we run make in gallium winsys directory when automatic Sep 15, 2010
generators [Generator] Ensure typeof (DependencyProperty) is registered properly May 5, 2011
gtk [desktop] Build against the regular System.dll, not the 2.1_raw one Apr 27, 2011
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runtime Fix build for cecil - mono (cbeaf9a) targets now build cecil (basic) … Dec 3, 2010
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sdk [SDK] Add a missing $(DESTDIR) to (SDK_ROOT) to fix the build in OSBS May 9, 2011
src Merge pull request #3 from ya1gaurav/patch-2 Nov 21, 2012
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AUTHORS Bot test Jul 23, 2010
COPYING Moonlight C runtime May 25, 2007
ChangeLog Change default paths for mcs to ../mono/mcs, now that mcs is inside Jul 22, 2010
INSTALL * Changed toos/moonvisi and test/templates to DIST_SUBDIRS May 21, 2009
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README.darwin initial merge of android support and more darwin support (VDA for vid… Apr 25, 2011
TODO update Dec 18, 2008
acinclude.m4 Make the build quiet Nov 18, 2010 pass --host and --build on to the mono build, and clean up the ;; dro… Apr 27, 2011 Need to configure PAL backend before configuring desktop support May 10, 2011 2009-10-19 Rolf Bjarne Kvinge <> Oct 19, 2009
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This is Moonlight, an open source implementation of Silverlight 1.0, 2.0, 
3.0 and 4.0 for Unix systems.   

See for more information. 


	For standard Unix configuration/installation instructions, see the INSTALL file.


	At this time, Moonlight trunk (this release) requires you to use
	trunk to get the required dependency (e.g. latest Mono.Cecil) and
	compilers (e.g. the new 'mcs' compiler). To build mono, do like this:

		git clone git:// system-mono
		cd system-mono && ./ && make && sudo make install
	Note that here we checkout mono to a different directory than below.

	To build Moonlight, you'll also need to get the source code for mono
	and mono-basic repositories from a specific revision from trunk.

	Do this like this:
            git clone git:// moon
            git clone git:// mono
            cd mono && git reset --hard f41f710 && cd ..
            git clone git:// mono-basic
            cd mono-basic && git reset --hard 4ef1fbe && cd ..

	To build pixel shader support, you need to get a specific
	revision of the mesa repository.

	Do this like this:
            git clone git://
            cd mesa && git reset --hard 3ed0a099c && cd ..

	The revision the codecs currently are at is: 15e2b1b2 (only applicable to buildbots
	and developers on the Moonlight team). For SVN users, the revision is: 10364

	The package wnck-sharp is also required, it can be found in the gnome-desktop-sharp
	repository on github:
	Alternatively, on ubuntu/debian, the gnome-desktop-sharp2 package provides it.

Compiling Mono for Moonlight

	Automatic Mode (recommended)

	This is recommended if you haven't built Mono before. This is also recommended if you
	have clean mono and mcs checkouts that you are going to use just for Moonlight.

	In this mode, you don't have to build Mono before building Moonlight, so you just do

                cd moon
                make && make install

	This will configure your Mono source tree with the minimum options required
	to build it for Moonlight. At the moment, these are:

		--with-moonlight=only --with-profile4=no --enable-minimal=aot,interpreter
		--with-ikvm-native=no --with-mcs-docs=no --disable-nls --disable-mono-debugger

	This Mono configuration will not be suitable for anything except Moonlight.

	If you want to use SGen with Moonlight, you'll need use the following option when


	Warning: Moonlight+Sgen has not been fully tested yet, and is likely unstable.
	*Enable this at your own risk*

	Build only Mode (advanced)

	This is recommended if you have built Mono before and you would like Moonlight to use
	your existing Mono source tree. This is for advanced users only - make sure you know
	what you're doing.

	In this mode, Moonlight will not touch your existing Mono configuration, it will build
	the parts it needs. Since it doesn't do a full build of mono+mcs, it's faster than a
	normal mono+mcs build.

	Before building moon, you need to make sure your mono configuration includes the
	following options:

	And you need to configure mono-basic like this:
		--with-moonlight-yes --moonlight-sdk-path=<mono checkout>/mcs/class/lib/moonlight_raw

	To build moon in this mode, configure it with the following options:


	If you want to use SGen with Moonlight, you'll need to use the following option:

		--with-sgen=yes --with-moon-gc=sgen

	Warning: Moonlight+SGen has not been fully tested yet, and is likely unstable.
	*Enable this at your own risk*

	Manual Mode (really advanced)

	On this mode, moon will not configure or build mono, you have to do it yourself.
	To activate this mode, configure moon with --with-manual-mono=yes

Configuration options

	If your mono/mcs checkout is not in the same place where you have your moon
	source, you can configure moon with:


	If you want to use ffmpeg with Moonlight, you need at least r20911 of ffmpeg and r30099 of libswscale:

		svn co -r 20911 svn:// && cd trunk/libswscale && svn up -r 30099

Installing and Testing

	If you want to test your newly installed Moonlight, do this:

		make test-plugin

	This will install it into your ~/.mozilla/plugins which will let
	both Firefox and Chrome pick it.


	A custom profiler is available which allows you to track which objects
	are being kept alive by strong GCHandles and also see the stacktrace
	for every gchandle that was not freed.

	This profiler is only built if you pass --with-object-tracking=yes to
	autogen and then subsequently be enabled as follows:

	export MOON_PROFILER=gchandle

	On application shutdown, right before the appdomain is freed, a GCHandle
	'leak' report will be printed. This will show all the objects being
	retained in memory because they have a strong gchandle attached to them.
	If you want to see where the gchandles were allocated you just have to
	export the following variable. This example will print the stacktraces of
	all the unfreed strong gchandles for the Uri type:


	If multiple strong handles are targetting the same CLR object, these
	will be grouped together. This makes it easy to see if 10,000 handles
	are targetting the same object or if its 10,000 different objects.

Runtime Options

	There are a couple of runtime-parameters that affect Moonlight behavior
	and turn on/off certain features. Those options are specified through
	the MOONLIGHT_OVERRIDES env variable. The more interesting ones are:

	* shapecache=yes/no 

		Use some extra memory for caching shapes.  Increases
		memory usage but helps with performance (off by
		default). The shape cache size is 6MB max.

	* render=ftb/btf

		Use front-to-back or back-to-front rendering (ftb is
 		the default).

	* cache=show/hide 

		Show the (shape) cache usage statistics. In plugin
		mode they're available through the right-click popup
		menu (hide by default). 

	* converter=yuv/ffmpeg 

		Use native mmx/sse2 conversion code or ffmpeg to do
		the yuv -> rgb colorspace conversion (by default we
		use the native yuv code).

	To launch Firefox with shape caching and ffmpeg converters use:

		$> MOONLIGHT_OVERRIDES="shapecache=yes,converter=ffmpeg" firefox

	Other options include:

	* ms-codecs=yes/no
	* ffmpeg-codecs=yes/no

		Controls which sets of codecs to use, the Microsoft
		ones or the ffmpeg ones.

	* timesource=manual/system

		Defaults to `system'.   

	Also if --with-debug=yes option was provided to configure script, the
	MOONLIGHT_DEBUG env variable controls which debug output is printed
	on the console. Valid values are: 

        	alsa, alsa-ex, audio, audio-ex, pulse, pulse-ex, httpstreaming, 
        	markers, markers-ex, mms, mediaplayer, mediaplayer-ex, pipeline, 
        	pipeline-error, framereaderloop, ui, ffmpeg, codecs, dependencyobject, 
        	downloader, font, layout, media, mediaelement, mediaelement-ex, 
        	buffering, asf, playlist, playlist-warn, text, xaml

	Moonlight currently contains two ASX parsers. The default
	parser is a custom parser that accounts for some of ASX's
	oddities such as quotes in attribute strings and non case
	sensitive element names (ie <foo></FOO>). The older parser
	uses a true xml parser, so will not handle these oddities
	well, however it has been more heavily tested. To use the
	older expat based playlist parser set the env variable

	There are two XAML parsers available in Moonlight. An
	unmanaged one that is used for Silverlight 1, 2 and 3
	applications and a managed one that is used for silverlight 4
	(and above) applications.  The parser is determined at runtime
	after the app manifest is read.  The unmanaged parser is
	always used to parse the app manifest.  After that the correct
	parser is determined based on Deployment::RuntimeVersion.

	You can force moonlight to use the managed parser on all sites
	by setting the MOON_USE_MANAGED_XAML_PARSER environment

	You can force moonlight to use the unmanaged parser on all
	environment variable.


	The C and C++ code that makes up the engine is dual-licensed
	under the LGPL v2 license and is also available commercially
	for developers interested in using Moonlight on embedded
	systems or other systems where the end-user can not upgrade
	the LGPL code on his own.

	The C# tests in test/2.0/Microsoft.Silverlight.Testing are
	copyrighted by Microsoft and released by them under the 
	open source MS-PL license.
	The C# controls in class/Microsoft.SilverlightControls/ and
	class/WPF.Toolkit are copyrighted by Microsoft and released by
	them under the open source MS-PL license.

Technical Details

	For implementation details and notes, see the NOTES file.

Test Suite

	To run the test suite, make sure that the output from
	configure indicates that the tests will be run.  Once this is
	done, you can run the tests like this:

	To run the Moonlight Unit Tests:

		cd moon/test/2.0/moon-unit
		make test

Firefox 3

	The original Silverlight.js shipped by Microsoft was incompatible
	with Firefox 3.  We have released a greasemonkey script 
	(data/silverlight-ff3-quirks.user.js) that will patch this behaviour
	for some sites.