Add html datasources

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	<meta name="abstract" content="KLayout is a free layout viewer and editor for several formats commonly used in the semiconductor industry to transfer layout data" />
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	<a class="dropdown-item" href="https://www.klayout.de/intro.html">KLayout Project</a>
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	<h1>About The Project</h1>

	<h2>KLayout Highlights</h2>

	<h3>General</h3>
	<ul>
	<li>Fast and accurate: fast loading and drawing</li>
	<li>Support of GDS and OASIS file formats with automatic uncompression of zlib compatible formats</li>
	<li>Full support of properties</li>
	<li>Full 64 bit support on Linux</li>
	<li>Extensible and configurable to a large degree by custom Ruby or Python scripts</li>
	<li>Integrated development environment for Ruby and Python scripts</li>
	</ul>

	<h3>Viewer</h3>
	<ul>
	<li>Overlay capabilities: multiple layouts can be loaded into one window</li>
	<li>Very flexible layer configuration: many display options including choice of fill pattern and different frame and fill colors.
	Animation, transparency, dimming/highlighting ...</li>
	<li>Layer grouping: the display properties of a group of layers can be changed at once</li>
	<li>Advanced layer display attributes: layers can be named, they can carry additional transformations, select certain hierarchy levels or select shapes by their properties</li>
	<li>Copy and paste of layers attributes to other panels</li>
	<li>Drawing order: select the layer that is show on top</li>
	<li>Descend into hierarchy: show a cell embedded into it's context</li>
	<li>Flexible rulers: unlimited count, flexible display styles. Multiple templates can be configured, rules can be
	edited (move, delete, copy & paste)</li>
	<li>Shape and instance browsers</li>
	<li>Bookmarks, various zoom modes, mouse wheel support, screenshot function ...</li>
	<li>Undo/redo on layer properties, for rulers ...</li>
	<li>Save: save layout or parts (cells, layers) of it to a different format, with scaling or different database unit.</li>
	<li>Image overlay capabilities: image files (i.e. jpg, png, gif) can be loaded and placed at an arbitrary position in the layout.</li>
	<li>Marker browser: certain error report files can be loaded and a browser tool is provided.</li>
	<li>Global transformation to flip/rotate image</li>
	</ul>

	<h3>Editor</h3>
	<ul>
	<li>Smart drawing functions with many options: angle constraints, grid ...</li>
	<li>True, in-place editing in subcells, variant building function</li>
	<li>Unlimited undo/redo</li>
	<li>Smart partial editing function to stretch shapes, move edges or vertices</li>
	<li>Copy and paste of shapes and whole cells, even to other layouts</li>
	<li>Many advanced editing functions: hierarchical operations, booleans, clip, corner rounding, sizing, alignment, layer operations ...</li>
	<li>Support for external libraries dynamically bound to a layout</li>
	<li>Parametrizable cells (PCells)</li>
	</ul>

	<h3>Other Features</h3>
	<ul>
	<li>A variety of useful utility functions: a XOR tool, a layout diff tool, a fill tool ...</li>
	<li>A DRC feature with a basic set of verification and layer manipulation functions</li>
	<li>A LVS feature</li>
	<li>A powerful search and replace feature with a special query language</li>
	<li>A technology package manager</li>
	<li>An add-on package manager ("Salt")</li>
	</ul>

	<h2>KLayout is a GDS and OASIS file viewer</h2>

	<p>
	Although a comparatively simple piece of software, a layout viewer is
	not only just a tool for the chip design engineer.
	Today design's complexity
	require not only a simple "viewer". Rather, a viewer is the microscope
	through which the engineer looks at the design.
	</p>
	<p>
	There are numerous viewers available, but sadly there are not many
	which satisfy a few basic requirements. Most of them are commercial and
	expensive. If there is need for a simple, yet powerful viewer - here it
	is.
	</p>
	<p>
	The main objective was to focus on the basic functionality but adding
	some useful features that many, even commercial viewers don't have.
	</p>
	<p>
	First rarely any tool allows to place two or even more layout files
	over each other.
	It often happens that you receive some layers in one file, the other
	layers in another. Some tools allow to load multiple layouts and switch
	between the windows. Well, this may help - but still the possibility of
	overlaying two layouts offers much more comfort.
	</p>
	<p>
	Sadly, almost no viewer is really precise. There is not much more
	annoying than a layout that changes when you zoom into it. Or
	placeholder shapes appearing at some zoom level and disappearing at the
	next, cell labels that cannot be caught because they jump around
	when you try to zoom them into view, and many other surprising ways or
	creative interpretation and optimization. This viewer shows the design
	as it is.
	</p>
	<p>
	Only some viewers allow to make layers "transparent". Only this way, a
	stack of layers can be visualized effectively. In addition, this viewer
	can animate layers to make them blink or scroll the fill pattern.
	Animation is a good tool to highlight certain layers.
	</p>
	<p>
	This viewer allows to display a layer "marked" by drawing a small cross
	on all shapes. There is no better way to visualize the distribution of
	a set of sparse error markers on a dense layout!
	</p>
	<p>
	All comes wrapped in a nice, Qt based state of the art GUI. Usage of
	the viewer is simple and is similar to that of other tools.
	</p>

	<h2>KLayout is more</h2>

	<p>
	Starting with version 0.15, KLayout is also an <b>editor</b> that allows to
	change GDS and OASIS files and create them from scratch. See the
	<a href="development.html">release notes</a>
	and the <a href="doc/manual/editor.html">editor mode quickstart manual</a> for
	a more detailed description. With version 0.22, parametrized cells became available
	in KLayout. See <a href="doc/about/about_pcells.html">About PCell's</a> for details
	about that feature.
	</p>

	<p>
	KLayout also offers a Ruby-based scripting environment called "RBA" which allows
	to automate various tasks, mainly in the visualisation area but also
	for layout generation. In addition there is a macro development environment with
	a debugger and editor featuring syntax highlighting for example.
	See <a href="doc/about/macro_editor.html">About Macro Development</a>
	and <a href="doc/programming/index.html">Programming Ruby scripts</a>
	for details about this feature.
	</p>
	<p>
	As a second choice, Python is offered as well for scripting. KLayout
	has a built-in Python and Ruby interpreter. Both work under the same
	hood and KLayout can execute code from both worlds.
	</p>

	<p>
	Additional features include DRC, LVS, XOR, layout diff, search & replace, technology package management
	and a lot more.
	</p>

	<h2>KLayout is free</h2>

	<p>
	KLayout is published under GNU public license GPL version 2 or any later version
	(<a href="http://www.gnu.org" target="_blank">www.gnu.org</a>) in compliance with the
	requirements for using the Qt open source licence. If may be copied and
	distributed freely.
	</p>

	<p>
	For more details see here: <a href="license.html">License</a>.
	</p>

	<h2>Current status</h2>

	<p>
	The current version is 0.29. Although this low number reflects the early
	stage of development, the version is reasonably stable.
	</p>
	<p>
	KLayout currently builds on recent Linux installations. Building on MacOS is possible basically.
	A binary distribution is available for Windows, both 32 and 64 bit (both an installer and
	a .zip archive with the binaries and libraries).
	Debian packages are provided for Ubuntu, RPM packages for CentOS and OpenSuSE.
	</p>
	<p>
	On Windows, KLayout can be built using cygwin, MinGW, MSYS and Microsoft Visual C++.
	On Linux, gcc or clang are supported. KLayout uses Qt and can be built on Qt4, Qt5 and Qt6.
	For the script interpreters Ruby 2.x and 3.x are supported. For Python, 2.7, 2.8 and 3.x
	are supported.
	For the precise requirements see the <a href="build.html">download and build</a>
	page.
	</p>
	<p>
	The Linux and MinGW build is performed by a simple wrapper shell script rather than
	some sophisticated configuration setup. Some script options allow configuration of the build.
	The build system is qmake from the Qt toolkit.
	</p>
	<p>
	It is possible to build the KLayout code without Qt, rendering a command-line only
	application. A Python module can be built that includes KLayout's core features
	for importing into an external Python interpreter.
	</p>

	<h2>Documentation</h2>

	<p>
	There is a <a href="doc/manual/basic.html">quick start manual</a> available to explain the basic features.
	Also for editor mode, a <a href="doc/manual/editor.html">editor mode quickstart manual</a> is provided.
	More details and documentation can be found on the <a href="doc/index.html">Main Documentation</a> page.
	There is also a built-in help system, which can be accessed through the "Help/Assistant" menu.
	</p>

	<p>
	The issue list for version 0.29 can be found in the <a href="issues.html">known bugs and issues list</a>
	</p>

	<h2>The future of the project</h2>

	<p>
	KLayout is a living project. The program is being used by people in their
	daily work already. As my time allows I will gradually enhance and extend
	the code.
	</p>

	<p>
	The main development management is done on GitHub (<a href="https://github.com/klayout/klayout">https://github.com/klayout/klayout</a>).
	Please use their bug tracker to issue bug reports and enhancement requests.
	</p>

	<p>
	Please feel free to issue feature requests to the mail address listed in
	the <a href="contact.html">contact page</a>. I am eager to learn about
	use cases and potential new applications for this tool.
	</p>


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