Release Notes

Version 0.24.10

Release date: 2017-04-01

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  • Enhancements: New method CellView#is_dirty? This method indicates that a cell view needs saving
  • Bugfix: DEF reader was not able to read routing Routed segments with vias plus continued wiring were not read. Instead an error message was shown saying "Invalid orientation specification"
  • Bugfix: Setting "technology-data" configuration property did not work Reading or writing the "technology-data" configuration property is the only way to access technology data from a script. Hence it's important that this property can be set. With this patch, "technology-data" can be set to an XML string which has the same format than the one stored within the configuration file.
  • Bugfix: Reader issues with some RVE files The RVE reader could not read files with cell names containing hyphens (like "A-B").
  • Bugfix: Inplace operators are now working in Python too For example "r1 += r2" was not working (r1 and r2 are pya.Region objects for example).

Version 0.24.9

Release date: 2016-11-29

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  • Enhancements: The RBA::Region#smooth function was enhanced to give somewhat better results
  • Enhancements: DXF's circle approximation can now also specified through an "accuracy" parameter: if less than the number of specified points is required to achieve the given accuracy, the number is reduced accordingly. This also applies to the polygon interpolation of spline and arc curves.
  • Enhancement: RBA integration now is compatible with Ruby 2.3 which allows building on Ubuntu 16 as well.
  • Enhancement: OASIS files with instance angles >360 were rejected before. Now, this has turned into a warning.
  • Bugfix: DEF reader was failing to read MASK/via combinations.
  • Bugfix: The marker browser's "show only rules with errors" option was enabled again on sorting of errors.
  • Bugfix: DRC: Using Layout objects for inputs didn't work
  • Bugfix: Copying Hierarchy treets containing PCell's made the PCell's being turned into static cells.

Version 0.24.8

Release date: 2016-06-19

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  • Bugfix: XOR and different or big database units: With tiling, XOR between two layouts with different database units was still not working correctly. Also, when the database unit was larger than 1nm, the XOR feature was dropping results sometimes when tiling was on.
  • Enhancements: progress bar shown also for "-z" mode scripts: The solution of 0.24.7 has been modified to avoid annoying progress bar windows popping up in background-window mode: Now, progress bar windows will only pop up if an active main window is present. This will enable progress bars for scripts that open their own main windows but still keep the application GUI-less when the script does not do so.
  • Bugfix: Crash on empty panel: When "New/Panel" is used a view without a layout is created. An attempt to create layout on such panels crashed the application.
  • Bugfix: LEF reader now can read PIN statements including VIA
  • Bugfix: Polygon smoothing was not working properly in some cases Previously the smoothing function was sometimes dropping vertexes from the polygons. Smoothing now does also guarantee not to exceed the given distance.
  • Bugfix: Sorting cells by area now sorts cells by name as second choice In the previous version, cells with identical area were grouped but the order was arbitrary. Now the name is used as the second-level sorting criterion which keeps such cells sorted by name.

Version 0.24.7

Release date: 2016-05-03

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  • Bugfix: XOR and different database units: With tiling, XOR between two layouts with different database units was not working correctly.
  • Enhancements: progress bar shown also for "-z" mode scripts: Scripts running in KLayout with the "-z" option (don't show main window) were not experiencing progress reporting before. Now a small modal window is shown during long-running operations that indicates the progress and provides a Cancel button to abort the operation.
  • Bugfix: Crash on using "Edit/Make cell": This happened sometimes if the selected objects contained instances.
  • Bugfix: Invalid behavior of paths with reflecting segments: For example a path made of the points (0, 0), (0, 1000) and (0, 0) had a reflecting segment which cause some computations (for example the bounding box) to return invalid results.

Version 0.24.6

Release date: 2016-03-22

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  • Bugfix: Early delete of plugin object when returning a new object from PluginFactory#create_plugin. The returned object was not held, so in Ruby the GC could destroy the object. This could lead to crashes in applications employing the Plugin API.
  • Bugfix: It was possible to edit read-only macros. For example, it was possible to enter new lines in macros marked as read-only. However, these changes were not saved.
  • Bugfix: Shift+Tab not working in macro editor. On some platforms, Shift+Tab was not working as expected. This key combinations was supposed to left-shift a selected block an undo indents.
  • Bugfix: Wrong scaling of layers when doing XOR's with layouts with different database units. This happened when the layouts had different layers and "summarize missing layers" was disabled.
  • Bugfix: "Search & Replace" was not working properly if named layers were present. Specifically the shape search was not working due to an incorrectly formed query.
  • Bugfix: Sizing produced incorrect results in case of slowly varying polygon contours. The effect was a contour with spiky distortions where two "almost parallel" edges connected.
  • Bugfix: The diff tool was not reporting differences correctly when layers were present in one layout while they were not present in the other. This happened specficially when "Summarize missing layers" was disabled.
  • Enhancement: New context mode in marker browser: "Current or Any". In this mode, the markers are displayed in the context of the current cell. If that is not possible because the markers are given for cells outside the cell tree of the current cell, the fallback is to show the markers in the current cell as in "Any" mode.
  • Enhancement: More consistent behaviour of cell and category filters in the marker browser. For example, the category filter is now also applied when selecting a node for a certain cell in the cell branch and if nested categories are present, the category filter is applied smarter - not just on each category.

Version 0.24.5

Release date: 2016-02-22

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  • Enhancement: Diff tool does not care about text alignment and font properties unless in "exact" mode. Previously alignment flags and font properties were compared in non-exact mode too causing some confusion for example when comparing OASIS vs. GDS.
  • Enhancement: XOR on layouts with different database units. Previously, the XOR tool refused to run on layouts with different database units.
  • Bugfix: Instance browser was messing up array instances sometimes. After browsing instances, in some cases array instances got messed up. This specifically happened with OASIS files.
  • Bugfix: The OASIS writer's S_TOP_CELL standard property now will correctly use an "n-string" value in strict mode.
  • Bugfix: The OASIS writer bailed out on 1x1 cell arrays. Now these pseudo arrays are written as single instances.
  • Bugfix: GUI type support for QVariant. RBA/pya did not provide constructors for QVariant from GUI types like QColor and QFont. These have been added now. The corresponding conversion functions to QColor, QFont etc. are provided as well.
  • Bugfix: Problems with QVariant constructor: some feature were not usable. For example, a double value could not be passed to the constructor. Disambiguators have been provided to solve these issues.
  • Enhancement: Cell/Category filter for marker browser. The marker browser now has a filter entry box to select specific cells or categories.
  • Enhancement: Images are cached now for faster image update. Specifically the "fit" image will be cached and if "fit" is selected again, the image is restored rather quickly (provided the window is not resized). The cache depth can be configured in "Setup/Display/Optimization".
  • Bugfix: "Read all other layers" option in LEF/DEF reader was potentially assigning GDS layers which have been defined in the layer mapping. Now, layers used in the layer map for targets are blocked and not used for automatic assignment.
  • Enhancement: The database unit can be configured now in LEF/DEF import options. Previously it was fixed to 1 nm.
  • Bugfix: RBA::LayerProperties#id was not always unique as stated by the documentation. Specifically not after a file was loaded.

Version 0.24.4

Release date: 2015-12-19

Download links


  • Enhancement: Layer colors are iterated for named layers without layer numbers as well. Such layers are created when reading DXF files for example and all layers had the same color initially. Now, these layers will be assigned different colors.
  • Bugfix: RBA::TilingProcess#threads was not working properly when assigning a value of 1.
  • Bugfix: The perimeter computation now has changed to 64 bit numerics reducing the risk of numerical overflow. In earlier versions, the perimeter computation of integer type shapes (polygons, boxes, regions) was performed with 32 bit length which is not sufficient to represent total perimeters of full layouts.
  • Bugfix: The OASIS writer's S_TOP_CELL standard property now is set to the correct value when using "Save cell as".
  • Bugfix: Some patches are provided for enhanced compatibility with MacOS. One MacOS-only bug was related to a crash when re-registering of PCell's while developing then.
  • Bugfix: PCell guiding shape parts could not be selected in partial editing mode using a drawn selection box.
  • Enhancement: The color of the guiding shapes can now be configured individually.
  • Bugfix: OASIS reader was not properly associating CELLNAME properties with cells as the standard requires. Instead CELLNAME properties were ignored.
  • Bugfix: Strict mode compatibility issues in OASIS writer: File level PROPERTY records were not put right at the beginning of the file, empty tables were not listed with 0 position, property value strings were not referenced by ID and the property modal variables were referenced sometimes after name records (specifically CELLNAME with standard properties enabled). According to the specification, the name records reset these variables so this is not correct. Other readers may report errors for such files.
  • Enhancement: OASIS writer file size reduction. Now, the OASIS writer will opimize the arrangement of cell array instances so that modal variables can be used for a better compaction.
  • Enhancement: During script debugging now the Assistant window is active even while the debugger is executing a script. The main window is still inactive however to avoid fatal cross-interactions between the debugger and the user interface.
  • Bugfix: The Python PCell sample was broken.
  • Bugfix: slowly bending paths have not been displayed correctly.
  • Bugfix: coordinates might have been swapped in the box properties page when switching from local to absolute coordinates and back.
  • Bugfix: certain ruler styles with independent x and y axis have not been displayed properly when using a global transformation.
  • Enhancement: the performance of "Flatten cell" is enhanced significantly in cases of many instances.
  • Bugfix: DRC output was producing new layers with an empty layer name selector (no major issue, but confusing).

Version 0.24.3

Release date: 2015-11-05

Download links


  • Enhancement: PYTHONPATH does not mess up the Windows installation any longer. If you want to set the PYTHONPATH for KLayout, use KLAYOUT_PYTHONPATH.
  • Bugfix: The oasis_write_std_properties attribute of RBA::SaveLayoutOptions did not work as described. To maintain backward compatibility and enable the cell bounding box feature, a new attribute called oasis_write_cell_bounding_boxes was introduced.
  • Bugfix: "Hide all" only hides the top level layer properties, not the members of layer groups.
  • Bugfix: S_BOUNDING_BOX standard properties now appear after CELLNAME records in OASIS files as required by the OASIS specification.
  • Bugfix: The unintuitive behavior of the "Writer Options" has been changed. Now, the writer options are applied to the saved layout always, not just on the first save. Previously, the program remembered the options and reused the previous options on following saves. This was quite unintuitive since changing the properties did not necessarily affect the way files were written.
  • Enhancement: The starting directory for files dialogs is the "Documents" folder on Windows now. Not the current directory which is the installation directory usually.
  • Bugfix: Signal names are property set for RBA::QListWidget and other objects. This enables the use of "indexesChanged" signals and eliminates Qt runtime warnings.
  • Bugfix: Library cells were not properly loaded again after reloading a layout which used libraries which itself referred to other libraries.
  • Bugfix: The program crashed sometimes when using report databases with properties.
  • Bugfix: Layers with a single box rendered wrong results in the DRC's size function with strong undersize. The boxes did not vanish as expected but instead were inverted.
  • Enhancement: The build now is compatible with Python 2.6.
  • Bugfix: Reading OASIS files in strict mode with cell names consisting of a "$" character followed by an integer number (like "$1") sometimes messed up the cells.
  • Bugfix: RBA::TilingProcessor could not be used both with tile size and tile count set since setting the tile size was resetting the tile count and vice versa.

Version 0.24.2

Release date: 2015-10-04

Download links


  • Bugfix: Flip and Rotate function did not work as expected when the view was descended into the hierarchy.
  • Enhancement: RBA::BrowserDialog now also accepts a parent parameter which are important to better integrate such dialogs into the application.
  • Bugfix/enhancement: "klayout_vo.exe" now is a pure viewer application again. By calling this executable, the edit functions cannot be enabled and the save functions are disabled as well. Under Linux, renaming the binary to "klayout_vo" switches KLayout into this mode as well.
  • Bugfix: The zoom and selection rectangle can now be dragged outside the visible area and still define the zoom or selection rectangle.
  • Bugfix: expressions were not coercing floating-point values consistently: The expression "to_i(2)+1.4" rendered 3 instead of 3.4 as expected. The sum was treated as an integer sum because the first operand is an integer. Now the integer is converted into a floating-point value as expected.

Version 0.24.1

Release date: 2015-08-26


  • Enhancement: switched to -O2 instead of -O3 to avoid issues with certain gcc versions for which -O3 appears to be broken.
  • Bugfix: fixed a backward compatibility issue in scripting. Specifically "view.each_object_selected { |s| s.shape }" will work again.
  • Bugfix: the layer matching algorithm in the .lyp file layer assignment is compatible with the previous version again. This specifically applies to "wildcard" specifications. In 0.24, named and unnamed layers were considered different even if GDS layer and datatype numbers were identical. The effect was that if a named layer was present, a .lyp file specification without that name was not matching the named layer and with "add other layers" the named layer was produced again.
  • Enhancement: "Apply all" in the object properties dialog behaves somewhat more intuitive now. Specifically changing the path endcap styles now works as expected. For the other properties, a choice was provided between applying changes in a relative or absolute way. For example, when the left edge of a box is changed, the left edges of all selected boxes are shifted by the same amount in relative mode. In absolute mode, the left edge will be set to the specified position for all selected boxes.
  • Bugfix: Python iterators will keep a reference to the source object now. This avoids problems when fetching iterated properties (typically "each..." methods) from short-living objects.
  • Bugfix: Python's StopIteration exception does no longer appear in the debugger now. This is an exception used internally to mark the end of an iteration sequence.
  • Bugfix: "Path#width=" does no longer reset the round end flag.
  • Enhancement: the "Show All" mode of the marker browser is persisted now.

Version 0.24

Release date: 2015-07-30


  • Enhancement: Python support: Scripts and PCells can now be coded in Python as well. Python and Ruby scripts may coexist in the same application and they can be debugged together. The macro IDE features a Python tab in which Python scripts can be managed. The language features of Python and Ruby are very similar, so the features of the integration are highly comparable and easy to translate. The Python module name is "pya".
  • Bugfix: When using a layer with special hierarchy level settings (i.e. #*), the ruler did not snap to that shapes.
  • Bugfix: Qt item ownership is now transferred on some methods. For example, "QTreeWidget#insertItem" now will transfer ownership of the item to the tree widget. Hence, when the variable holding the item goes out of scope, the tree item will not be destroyed.
  • Enhancement: The shape selection can now be manipulated through scripts (new LayoutView methods "object_selection=", "select_object" etc.)
  • Enhancement: New edge vs. region operations are supported (edge AND region and edge MINUS region)
  • Enhancement: RBA/pya objects now in general feature a "_manage" and "_unmanage" method will allows releasing the ownership over an object in cases where object lifetime control is important (specifically when passing objects around in Qt applications).
  • Enhancement: Many new RBA methods, i.e.
    DPolygon#assign_hull (raw argument)
    DPolygon#assign_hole (raw argument)
    DPolygon#each_edge (with contour argument)
    DPolygon#insert_hole (raw argument)
    DSimplePolygon#initialize (raw parameter)
    DSimplePolygon#initialize (raw parameter)
    Edges#& (with Region)
    Edges#&= (with Region)
    Edges#- (with Region)
    Edges#-= (with Region)
    Layout#begin_shapes (with cell ref)
    Layout#begin_shapes_overlapping (with cell ref)
    Layout#begin_shapes_touching (with cell ref)
    Layout#create_cell (with PCell parameters and/or lib name)
    RdbItemValue#initialize (with float argument)
    Shape#each_edge (with contour argument)
  • Enhancement: Qt API is aligned better with C++ Qt notation. Several bug fixes, new features and stability enhancements. For example: New: RBA::Qt::white or RBA::Qt::GlobalColor::white Old: RBA::Qt_GlobalColor::white
  • Enhancement: the debugger can now be disabled in the macro editor IDE for enhanced script execution performance with IDE window open and less interactions between Qt code and Macro IDE
  • Bugfix: DRC crashed when outputting shapes to a layer that was used as an input in further parts of the script but has been declared as input befor the layer was output.
  • Bugfix: ".lyp wildcard replacement" now honors transformations as well
  • Bugfix: Gerber import issues fixed: Zero-diameter circular apertures moves are translated into lines, Zero-length moves must not be clear for G1 and circular apertures.
  • Bugfix: The technology button now applies the technology even if the technology did not change.
  • Enhancement: Polygons with holes are better supported now (for example in partial editing). Such polygons cannot be written to GDS or OASIS (they will be converted to ones without holes), but they may be created in DRC scripts.
  • Bugfix: "Reload layout" now doesn't forget the technology that was attached to a layout.
  • Bugfix: Box side setters now behave more consistently in scripting. Before this fix, it was not possible to assign the sides of a box this way: "b = Box::new; b.left = 100; b.right = 300".
  • Bugfix: recursive library references (library referencing itself indirectly) made the application crash.
  • Bugfix: Subclass mapping sometimes failed in certain cases. This was particular annoying in Qt's event handlers since "QKeyEvent" (or similar classes) only showed up "QEvent".
  • Enhancement: "Move selection to" function available in "Edit/Selection/Move To". With this function, the selection (shapes are instances) can be moved to a specific position. You can specify the reference point to use. For example the center of the bounding box.
  • Bugfix: Menu icon assignment was not working in some cases within scripts.
  • Bugfix: Readonly (global) macros could be edited but not saved.
  • Bugfix: Instances could be selected even if they had only invalid layers.
  • Enhancement: The application now features a crash handler. This handler gives some debugging information about the crash which you can send together with a bug report. In some cases, the crash handler will allow continuing to work with the application although it's highly advisable to save and close.
  • Bugfix: Registering plugins through the script's plugin API sometimes disabled view features.
  • Bugfix: The macro IDE is not automatically put in the foreground any more. This sometimes interfered with modal dialogs shown from a macro.
  • Enhancement: The macro IDE now features watch expressions which are automatically evaluated when in a breakpoint.
  • Enhancement: The "Save Layout" options are now separated from the save function. That means they can be configured once and the dialog will not pop up always when saving. This way, "Save All" is provided which will save all open files with the current options.
  • Enhancement: A "Close All" function to close all open layouts.
  • Enhancement: In scripted layout loads, multiple files can be loaded into the same layout object. In that case, the content of the files are merged. This worked so far with GDS. Now this also works with OASIS.
  • Bugfix: OASIS int-typed properties now as written as such. Before, they have been written as strings.
  • Enhancement: sizing code and path to polygon translation now will better maintain 45-degree edges.
  • Enhancement: DRC support for edge/polygon booleans ("edges AND polygons" will select the edges inside the polygons, "edges MINUS polygons" will remove the edges inside the polygons)
  • Enhancement: Global layout properties supported as well. Layout properties can be edited by selecting "User Properties" in "File/Layout Properties". They are written to OASIS. Writing to GDS2 is optional since that may create compatibility issues with other tools.
  • Enhancement: The OASIS writer will now produce some standard properties: "S_TOP_CELL", "S_BOUNDING_BOX", "S_CELL_OFFSET", "S_MAX_SIGNED_INTEGER_WIDTH", "S_MAX_UNSIGNED_INTEGER_WIDTH" and "S_BOUNDING_BOXES_AVAILABLE".
  • Enhancement: User properties of cells are available in cell context menu too: this way there can be browsed in non-editable mode too.
  • Enhancement: "Degenerated" polygons (one or two points) can be created in scripts now when using "raw" mode. Such polygons are useful in the context of Minkowsky sums for example.
  • Bugfix: The application crashed when the macro currently running was deleted.
  • Enhancement: "Search & replace" now is available in viewer mode too, but without the ability to replace or delete.
  • Enhancement: In menu paths, appending a "+" to the path means to add something after that item.
  • Bugfix: Guiding shapes are only selected if the PCell corresponding to them is visible.
  • Enhancement: there is a clearer indication now that 'Show layers without fill' is on.
  • Enhancement: a new mode is available in which PCell content can be selected too. When editing things inside PCells however, PCell recomputation may revert these edits. The mode is found in "File/Setup", "Application/Selection" page.
  • Enhancement: Edge set boolean operations have been too selective with respect to almost-parallel edges. Now a tolerance is applied allowing edges to deviate by ~1 dbu.
  • Enhancement: Search & replace: texts, paths and boxes are exported into report databases. Shapes and instances are shown in micron coordinates and as seen in top.
  • Enhancement: "Apply all" in properties dialogs: with this function, a specific change is applied to all shapes or instances of the same class. For example a path width change is applied to all other selected paths. The change will be applied smartly (hopefully), so that the intention of the change is preserved. For example a left edge shift for a box will be turned into the same shift for all other selected boxes.
  • Enhancement: multiple categories can be selected in the marker browser now.
  • Enhancement: the instance properties page now shows the cell dimensions (which are not editable of course).
  • Enhancement: box property editing is less tedious - the left and right coordinates will now swap if the order changes and the mode (width/center or coordinates) is maintained.
  • Enhancement: Report databases now support "tagged values" (values with a name) which are shown in the marker list. The markers can be sorted by these values, provided they are string or numerical values. RVE properties are read as tagged values.

Version 0.23.11

Release date: 2015-05-23


  • Bugfix: partial edit mode - a cell could be selected even if not visible With the new version, the selection behavior of normal selection and partial selection are somewhat more consistent.
  • Bugfix: The CIF reader was not able to read CIF files with line breaks Commands with line breaks separating arguments were not read correctly.
  • Bugfix: Printout now considers global transformation correctly Previously, the global transformation was ignored on printout and for screenshots.
  • Enhancement: Partial edit mode now also supports polygons with holes Polygons with holes are rare since they cannot be represented in GDS or OASIS files. But they can be generated in DRC scripts. Now, such polygons can be edited in partial edit mode too.
  • Bugfix: LEF/DEF reader now correctly uses half the path width for path extension Previously the default value was 0.
  • Bugfix: Library update was not working properly for OASIS reader OASIS files with library references had as issue when updating the library cells: cell deleted in the library were not deleted in the layout.
  • Enhancement: Warning, when drawing on invisible layers Previously there was not feedback: the shape was drawn, but not visible. Now, a warning pops up when trying to draw on invisible layers. This warning can be disabled.

Version 0.23.10

Release date: 2015-03-07


  • Bugfix/Enhancement: CIF compatibility. The reader was not fully compatible with the specification. For example, lower-case characters have not been ignored as specified. This has been fixed among other compatibility issues.
  • Enhancement: The CIF writer now has an option to use blank characters as x/y separator. Some tools apparently don't like comma characters for separators (that is still the default).
  • Enhancement: The CIF writer now has an option to emit dummy cell calls on top level to reference the top cells. The top-level entity is unnamed and does not correspond to a cell. Despite that some tools require these entities not to be empty and hold dummy references to the real top cells at least.
  • Bugfix: Key bindings to default grid menu entries were not working
  • Bugfix: When a layer was deleted and a shape on that layer was selected, the application crashed
  • Bugfix: Search and replace sometimes gave an internal error, for example with the following query: 'with * do = "A" +'
  • Bugfix: Search and replace was crashing when trying to delete instances.
  • Bugfix: Net tracer bug: the first selected shape was always taken as a whole even if parts were disabled through boolean NOT operations.
  • Bugfix: Net tracer was using the wrong origin when working in "descend" mode.
  • Bugfix/Enhancement: The technology setup now features "read all" and "add other layers" flags for the reader mapping table and the layer properties. Before, the global flags were used causing some confusion. With the new options the behavior can be configured consistently.
  • Enhancement: The file dialogs now remember the file type chosen.
  • Bugfix: The application issues a error message when trying to write very big images instead of crashing
  • Enhancement: Two new Ruby methods to write image files. These new methods are LayoutView#save_image_with_options and LayoutView# get_image_with_options. These methods allow configuration of more features for the image generation like box to draw, oversampling etc.
  • Enhancement: DXF reader now converts ATTDEF entities to texts too.
  • Bugfix: The application crashed when the top cell was deleted.

Version 0.23.9

Release date: 2014-12-28


  • Bugfix: DEF reader: E and W pin orientation was swapped.
  • Bugfix: DEF reader: PIN definitions are read correctly even if the PLACED statement comes before the LAYER statement.
  • Enhancement: LEF reader: deprecated keyword TOPOPSTACKONLY is ignored for VIA statements now instead of giving an error.
  • Enhancement: DEF reader: the reader now is able to read BLOCKAGE definitions. Currently, routing and placement blockages are supported. The layers they appear on can be configured the in the same fashion than for the other elements.
  • Bugfix: Typing in the Macro Editor was slow if many macros were bound to menus.
  • Enhancement: GDS AREF's with pitches not a multiple of the database unit are split into individual arrays rather than simply rounding the pitch. The disadvantage of the rounding solution was an accumulation of rounding errors over the array instances leading to a substantial deviation from the target location.
  • Bugfix: Paths have sometimes not been displayed properly, specifically paths with a small segment length and sharp bends.
  • Bugfix: DXF reader: bulges have not been ignored on the last vertex of a non-closed POLYLINE as they should.

Version 0.23.8

Release date: 2014-10-11


  • Bugfix: DRC: "inside", "not_inside", "outside" and "not_outside" were broken
  • Bugfix: LEF/DEF reader: VIA PATTERN support was broken
  • Enhancement: LEF/DEF reader: Support for LEF/DEF Version 5.8 syntax
  • Bugfix: The Tab order of certain dialogs was weired
  • Bugfix: Multi-layout layer properties files in technology setups behaved strangely. Now, the behavior of layout properties files (.lyp) is the same in the technology context and the usual application context.

Version 0.23.7

Release date: 2014-10-11


  • Bugfix: DRC was crashing on second run if it was overwriting an input file.
  • Bugfix: RBA::InputDialog::ask_double was not accepting negative numbers.
  • Bugfix: With a net highlighted in the net tracer, so view zoomed to show the whole net if a layer was shown or hidden.
  • Bugfix: Ruler snapping was disabled for moderately complex hierarchies. The threshold has been increased. Now snapping of the ruler to objects also works for denser and more complex layouts.
  • Bugfix: Some signals were not available to Ruby (i.e. QIODevice signals).
  • Enhancement: When using "Hide empty layers", the layer list will scroll to keep the selected layer visible (unless it is empty and hidden therefore).
  • Enhancement: A "split view" for the cell trees. When multiple layouts are loaded in a panel, you can choose split view (right mouse in cell list, check "Split View"). In split view, up to 5 cell trees are shown at the same time.

Version 0.23.6

Release date: 2014-08-20


  • Bugfix: A DRC issue was fixed. Sometimes errors were reported too many times. This happened for big polygons wrapping smaller ones.
  • Enhancement: Now, macro key bindings can be edited on the key binding page of the setup dialog too if the macros are shown in the menu. Before, those changes were reset when the program was closed.
  • Enhancement: The DXF reader now also considers thin (width = 0) POLYLINES as mergable edge contributions in the "merge edge" modes if the POLYLINES are closed ones too.
  • Bugfix: The float function in the OASIS writer was fixed. This is a code cleanup, and did not have effect on functionality (yet).

Version 0.23.5

Release date: 2014-07-04


  • Bugfix: DXF polyline mode could not be set in reader options in Ruby. A value of 3 and 4 was not allowed.
  • Enhancement: CIRCLE AND ELLIPSE objects are treated as thin lines in DXF reader's "merge edges" mode. Hence they participate in region formation.
  • Enhancement: A warning is displayed when an ambiguous keyboard shortcut is triggered
  • Bugfix: An assertion in the boolean processor was fixed.
  • Bugfix: The following command caused the program to crash on the Ruby console: "require 'net/http'; uri = URI('xyz')" .
  • Bugfix: The "cell" function in DRC scripts was creating a new cell if is was not existing yet. In general, the DRC function is not supposed to change the layout's hierarchy.
  • Bugfix: The macro editor now can distinguish between the same file with different suffixes. Before, "test.rb" and "test.lym" were not presented as different files.
  • Enhancement: The marker browser now indicates if the number of markers exceeds the specified maximum and the list is shortened.
  • Bugfix: The "browser.rb" sample was not working any longer because of a backward compatibility issue.

Version 0.23.4

Release date: 2014-03-16


  • Bugfix: UTF8 encoding in XML was ignored - special characters have not been read properly. This in particular caused issues in the .lym macro files when UTF8 characters are employed.
  • Bugfix: Backward compatiblity issue: layout files with PCells written with 0.23 could not be read with 0.22 and vice versa.
  • Bugfix: Label text centering and right-alignment was not working propertly with the default font.
  • Bugfix: A segmentation fault occuring when rerunning a PCell macro has been fixed.
  • Bugfix: PCell layer parameters can be set to "no layer" now. This was possible before, but caused some issues - i.e. creation of dead layers.

Version 0.23.3

Release date: 2014-02-22


  • Bugfix: DRC bug fixed: "@x" notation was not working for layout, source and target.
  • Bugfix: A boolean processor bug was fixed that caused an internal error in some rare cases with certain edge configurations.
  • Bugfix: Image documentation was wrong about the offset meaning: it's the center, not the lower left corner.
  • Bugfix: Layer table tab names were lost when sorting or regrouping a layer list.
  • Enhancement: The net tracer now can be configured to auto-color the nets with a set of predefined colors. 8 colors can be configured in the configuration dialog or the net tracer setup page in the setup dialog.
  • Enhancement: The net tracer now has a "Redo" button which will trace all nets in the list again using the original start and stop (for path tracing) locations.

Version 0.23.2

Release date: 2014-01-26


  • Bugfix: Build issues fixed for MacOS and some Qt versions.
  • Bugfix: DRC log to file was not working.
  • Bugfix: Ruby script was crashing when using ruby-implemented tiling processor receiver and multi-threaded tiling.
  • Bugfix: Layout move function was using database units instead of micron.
  • Bugfix: Search & replace markes where not shown in a reasonable context for search in "All cells", instance markers are not shown correctly.
  • Bugfix: DRC now also handles the case of different database units for multiple inputs. The database unit of output files is now taken from the input.
  • Enhancement: Search & replace layer selection combo boxes now show display string
  • Enhancement: Unexpected elements are ignored in XML files.
  • Enhancement: Options are provided for making boolean operations not optimize the "single empty input" case for XOR tool and DRC (strict handling mode).

Version 0.23.1

Release date: 2013-12-07


  • Bugfix: RBA SimplePolygon#inside? and Polygon#inside? now work as expected
  • Bugfix: DRC output to marker browser now works as expected
  • Bugfix: HTTP URL's now are written as such into the MRU list
  • Bugfix: A net tracer crash was fixed
  • Bugfix: Net tracer connectivity setup: the move buttons now work as expected
  • Bugfix: a DRC issue was fixed when assigning the output of modifying operations (i.e. "layer=layer.move(...)" was causing a crash).
  • Bugfix: some memory and static code analysis issues have been fixed after analysis with valgrind, clang and Coverity
  • Enhancement: compatibility with clang 3.3 was established as well as compatibility with Ruby 2.0

Version 0.23

Release date: 2013-11-26


  • Enhancement: Net tracer: Nets can now be colored individually. By default the coloring is taken from the configuration, but it is possible to assign a specific color to a net later. Click on the net and choose a color in the net info section right to the list of nets.
  • Enhancement: The OASIS writer now uses CBLOCK compression also for tables.
  • Enhancement: Transparency is now supported for images (as a mask only - not a real alpha channel, but close to).
  • Enhancement: The layer/datatype assignment for purely named layers originating from DXF or CIF has changed. It's now no longer done when reading DXF or CIF but when writing the file. This solution is more general and allows some level of control, i.e. by scripts.
  • Enhancement: "http:..." URLs are now allowed as file names - such files are loaded from the URL instead. Such URL's can be used from the command line or within scripts for example. Drag and drop of HTTP URLs is also support. This allows dropping of URLs from the browser into KLayout.
  • Enhancement: Menus have been rearranged: The "Tools" menu was split into "Tools" and "Macros", "Verification" menu has been resolved into the "Tools" menu. The "Tools" menu now is lighter and ready to accommodate more entries in the future.
  • Enhancement: New command line options are available: "-nn" to load .lyt (technology file) on command line. "-b" for batch mode (implies some batch-mode specific options), "-zz" for display-less applications.
  • Enhancement: "Adjust cell origin" now adjusts the cell in their parents as well (optional).
  • Enhancement: Cells can have properties now: Cells can now have user properties as well. However, writing these properties to files is subject to some constraints. Cell properties are fully supported on OASIS and optionally supported on GDS using an extension feature. By default, cell properties are not written to GDS.
  • Enhancement: Transformations are now available for whole layout (applied to all cells). This is specifically useful for scaling layouts. These functions are available in Edit/Layout.
  • Enhancement: A function now is available to convert PCell's to normal (static) cells. This function can be found in Edit/Layout (for all cells) and Edit/Cell (for the selected cells).
  • Enhancement: The printout now has a header and footer.
  • Enhancement: The XOR can now be confined to a region. By default, the scope is "All". Alternatively, the visible region or a region marked by one or more rulers can be considered for the compare.
  • Enhancement: There is an option now to hide guiding shapes for PCell instances. This option can be found on "Display/Cell" in the setup dialog. Other options allow to configure the way the guiding shapes are shown.
  • Enhancement: New option to pan/zoom or do nothing on paste - Option is in "Navigation/Zoom and Pan" in setup dialog.
  • Enhancement: Cells can now be copied in "shallow copy" mode without creating copies of the child cells. If "copy cells" is chosen on a cell which has child cells, shallow or deep copy mode can be selected.
  • Enhancement: A "Tap" function is provided now. The tap function selects and changes to the layer of the currently selected shape. New shapes will be put on that layer.
  • Enhancement: There now is a function to convert instance arrays to single instances. The function is called "Resolve arrays" and is available in Edit/Selection.
  • Enhancement: The instantiation path of an object is now shown in the status bar.
  • Enhancement: An option is now provided for configuring the replacement character for OASIS and GDS. The replacement character is used instead of illegal characters.
  • Enhancement: Some unicode support for texts in default font ("μ" now is available).
  • Enhancement: There is a GDS2 writer option now to eliminate zero-length paths.
  • Enhancement: There are new save options: disable or enable writing of PCell and library cell contexts, drop hidden cells (allows to select certain levels of hierarchy by choosing only those levels for display), keep instances even if cells are dropped (creates ghost cells).
  • Enhancement: Layers can now be made invalid. Invalid layers don't participate in selection or snapping. To make selected layers invalid, choose "Make invalid" from the layer context menu, to make them valid again, choose "Make valid".
  • Enhancement: Multi-selection on 'open layout' allows to open many files at once.
  • Enhancement: DRC functionality: a rich DRC engine was integrated in the tool. The implementation is flat, so performance is limited compared to hierarchical tools. A tiling approach is available to distribute tasks on multiple CPU's to somewhat mitigate that issue. Detailed information about that feature can be found here.
  • Enhancement: Search and replace feature plus custom queries: the search & replace functionality is just the tip of the iceberg. "Custom queries" are a powerful feature to perform queries and modifications using a SQL-like language. Details about this feature can be found here
  • Enhancement: Some enhancements on LEF/DEF import: i.e. proper default routing rule with octagon ends implemented in DEF, NONDEFAULTRULES for LEF reader
  • Enhancement: Auto-import feature for technologies: technologies can now be imported from the installation folder automatically.
  • Enhancement: RBA enhancements: Tiling processor, fill tool bindings, regions, edge collections, edge pairs and edge pair collections, numerous new methods and classes.
  • Enhancement: More configuration options for macro IDE: stop on exception will ask whether to stop in the debugger when an exception is thrown. The editor font can now be configured.
  • Enhancement: The diff tool now has an option to disable smart cell matching and enable name-only cell matching.
  • Enhancement: cells can now be dragged and dropped from the cell list to the canvas.
  • Bugfix: Layout diff reported texts as different which are not.
  • Bugfix: Instance editor options problem fixed: magnification could not be edited in some cases.
  • Bugfix: DXF reader: anisotropic scaling of block deletes subcells of that block, error messages on coordinate overflow.
  • Bugfix: OASIS output files were corrupt when edge objects were written.
  • Bugfix: Problems with boxes having odd width are solved now.
  • Bugfix: Close function - "Cancel" now works properly on the "which view to close" dialog.
  • Bugfix: Closing the main window while layouts are loaded crashed the application.
  • Bugfix: Net tracer did not work properly with OASIS in viewer mode.
  • Bugfix: Diff tool was not matching cells propertly in some cases

Version 0.22.9

Release date: 2013-09-22


  • Bugfixes: LEF/DEF reader: NONDEFAULTRULES, TAPERRULE implemented now, correct octagon style for default rules for non-rectangular routing, POLYGON and RECT implemented for routing.
  • Bugfix: DXF reader crash fixed for ARC objects with identical start and end angle, polygons have not been read in some cases.
  • Bugfix: It is possible again to use "Show as new top" after "Descend/Ascend hierarchy" without clicking at the cell list.

Version 0.22.8

Release date: 2013-06-21


  • Enhancement: "gds2" now is recognized as extension of GDS files.
  • Bugfix: CIF reader was broken in some cases. Layers have not been assigned properly and sometimes, identical or no GDS layers were assigned.
  • Bugfix: RecursiveShapeIterator (RBA) had an issue when iterating shape arrays. This was the case when working on OASIS files in viewer mode for example.
  • Bugfix: DEF reader had some issues (TAPER and RESISTANCE keywords have not been supported properly).

Version 0.22.7

Release date: 2013-03-05


  • Bugfix: The output mode in the XOR tool dialog was not shown properly. Instead of "Report database", "Other layout" was shown etc.
  • Bugfix: When creating a third layout for output of the XOR tool, the database unit was not set to the input layout's database unit.
  • Bugfix: Layout numbering was not done correctly when multiple layouts were loaded with the same file name.
  • Bugfix: In viewer mode sometimes it was not possible to move to the next selected item in the shape properties dialog. A message appeared saying "Shape array members cannot be modified."
  • Enhancement: OASIS writer performance is significantly better now in cases where shape compression is relevant. Also, shape arrays are maintained as such which avoids repeated compression.
  • Bugfix: A drawing bug was fixed which caused shape arrays to disappear on certain zoom levels.
  • Bugfix: "Add missing layers" now adds all existing layers, not just the ones present in the currently selected cell also in viewer mode.

Version 0.22.6

Release date: 2013-03-05


  • Bugfix: It was possible for example to add shapes to a PCell. This feature does not make sense since PCell's are updated when required. In that case, changes are lost. This feature has been disabled for PCell's.
  • Bugfix: RBA::Application#get_config was crashing in some cases (i.e. in -zz mode)
  • Bugfix: The "create cell variants" function was not working properly if a single instance array was present for a cell.
  • Bugfix: The radius was limited too strictly for end segments for the ROUND_PATH PCell of the Basic library.
  • Enhancement: Some additional RBA methods have been enabled which disambiguate various constructors for Qt objects (i.e RBA::QVariant#new_i allows to create a variant with "int" type)
  • Bugfix: the Ruby-less build was broken.
  • Bugfix: Copy & paste was not working for the layer list. This is an effect of the modified key handling in KLayout 0.22. New menu functions are provided in the layer list's context menu to resolve the ambiguities involved in that feature. These menu functions allow to copy, cut and paste parts of the layer list to other windows or tabs.
  • Bugfix: PCell's are now cleared before the production method is called.
  • Enhancement: OASIS layer names are also recognized if the LAYERNAME record appears after the layout's body.
  • Bugfix: in previous versions it could happen that the layout panels got locked and it was no longer possible to switch between different tabs.
  • Bugfix: a potential crash in the drawing engine was fixed.

Version 0.22.5

Release date: 2013-02-03


  • Bugfix: Layer properties file in technology definitions can be given as relative path in which case KLayout uses the base path now.
  • Enhancement: Windows installer now provides a useful default installation path when started as non-administrator.
  • Bugfix: GDS reader: a false warning was issued sometimes indicating that an AREF might be off-grid.
  • Bugfix: Fixed build for MacOS and some Linux distributions.
  • Bugfix: Fixed a crash that happened when KLayout was closed while a instance property form was still open.
  • Enhancement: PCell names are now shown in the status bar
  • Bugfix: Fixed a crash that happened when a macro was run that was already closed.
  • Bugfix: MRU list for macro editor's console was getting huge when the macro editor was closed and opened again in the same session.
  • RBA bugfixes: "destroyed?" was not working properly in some cases. Infinite recursion happened for for PCell implementation without "get_layers".
  • Enhancement: Better error messages for RBA including class and method names.
  • Bugfix: PCell implementation issue. Some methods were passed a deep copy of the layout object which first created a potential performance issue and second made it impossible to modify the layout.
  • Enhancement: DXF writer now provides a header which enables some tools to read the generated DXF files.
  • Bugfix: DXF reader: degenerated polygons for HATCH objects don't cause an assertion now.

Version 0.22.4

Release date: 2012-12-30


  • The bugs mentioned for 0.22.3 on the Issues and known bugs page are fixed.
  • Enhancement: the "detailed" view of a net's properties in the net tracer now reports area and perimeter of the net's shapes (only available for nets up to ~2000 shapes to avoid timeouts on computation). Thanks to Peter for providing the raw version of that code.
  • DXF reader enhancements: Support for "999" comment records. DIMENSION and SPLINE entities are supported now to some extent. "fit" formatting of TEXT objects supported now. Holes are correctly formed now from multiple POLYLINE/LINE items when combining them into polygons.
  • DXF writer: HATCH entries are written in a compatible way now. Text formatting flags are fixed (top and bottom formatting was swapped).

Version 0.22.3

Release date: 2012-11-25


  • The bugs mentioned on the Issues and known bugs page are fixed.
  • Bugfix: a segmentation fault sometimes happened in the drawing engine
  • DXF reader enhancements: Anisotropic scaling of instances is supported. LWPOLYLINES with both common and variable width are handled more gracefully. Closed polylines produce closed shapes now, not closed paths.
  • Selecting of instances with non-orthogonal transformations is easier now
  • The local config files now override the global one again like this was in 0.21.x.
  • A compile problem with older gcc's (namely gcc 4.4) was fixed.
  • Selection of cells in the cell tree now has been fixed (before that sometimes cells were selected in addition to current ones instead of being the only one selected).
  • The RVE DB reader was enhanced to read error waivers and certain new forms of the RVE file.
  • The align operation now works also if there is not a primary and secondary selection (i.e. selection by box)
  • "Layer pollution" does not happen when instantiating a PCell or library cell which is instantiated in another panel
  • PCell layer parameters now can be set to any layer which is present in the layer list, not just the ones which are created already in the database
  • The round corners function has been fixed for certain cases. In particular the limitations are less strict (for example it is possible now to create a donut from a square with a hole). Changing of the radius later now works more reliably.
  • "Shallow copy mode" now works again for copy & paste of instances. Previously instances were always copies in deep copy mode which creates new cells.
  • Move of partial selection now works like the move function for other objects: select a subset of edges, click on them to start dragging and click again to drop them.
  • Arrow keys don't interfere with move by mouse mode any longer. Previously using the arrow keys while moving objects with the mouse had strange effects.

Version 0.22.2

Release date: 2012-11-01


  • The bugs mentioned on the Issues and known bugs page are fixed.
  • Copy & and paste of PCell or library instances across layouts did not work: Instead, the cell was duplicated, but it's no longer a PCell or library cell.
  • "klayout -v" was crashing: The -v option is supposed to print the version number. After printing it, the executable terminated with a segmentation fault.
  • 'Real' unicode file names could not be used: Using Unicode filenames (i.e. Chinese) file names did not work properly. In particular these files were not opened on Windows. Unicode file names were not recorded properly in the "recently used" list. In version 0.22.2, unicode files names can be used in all places on Windows and Linux.
  • Some LEF import issues solved: The outline layer was not always generated correctly. Pin labels were not generated on pin shapes for LEF import.
  • KLayout was crashing on exit when the clipboard contained something: The application issued a segmentation fault on exit (or "is not working" on Windows) when the clipboard contained data.
  • Ruby debugger crashed in some cases: In some cases (i.e. breakpoint in a widget callback) the debugger crashed with a "Stack level too deep" message.
  • Instances of leaf cells were always copied "flat" to another layout: There was no way to copy the instance plus cells before this was fixed.
  • Sometimes PCell variants remain as top level cells: If the Instance function was cancelled and a PCell was active, a new top cell remained which held the PCell that was about to be placed. These cells could be deleted manually, but that may be annoying.
  • Help index cache was growing large in some cases: When switching between versions, the help index that KLayout creates once grew larger every time a new program version was used. This increased startup times of the program.
  • An "abs" function was missing in expressions.
  • Experimental support for 64bit coordinates is provided. To enable 64bit coordinates, use "-with-64bit-coord" on the build script. This feature requires gcc >= 4.4 and a 64bit platform. 64bit coordinate support is "experimental" because of some known issues (i.e. it is possible to write corrupt GDS files with such large coordinates). OASIS on the other hand supports 64bit coordinates.

Version 0.22.1

Release date: 2012-10-09


Version 0.22

Release date: 2012-09-19


  • A script (macro) development environment is now integrated into KLayout. It features a simple debugger, a syntax highlighting editor. For details see About Macro Development.
  • KLayout now features an integrated help system (available through the "Help/Assistant" menu entry).
  • Support for libraries. See About Libraries for details.
  • KLayout now supports parametrized cells (PCells). There is a cool feature called "guiding shapes". Learn more about that here: About PCell's.
  • A basic library is provided adding text generation for example to KLayout. See About The Basic Library for details.
  • The net tracer now allows to use layer combinations (derived by boolean operations) for the conductive and via layers. See The Net Tracing Feature for details.
  • A technology management is integrated into Klayout. That allows to switch various settings depending on the choosen technology. See About Technology Management for details about this feature.
  • The drawing can now be rotated or flipped without having to modify the layout. This function can be found in the "Display" menu under "Global Transformation".
  • The "background" combination mode allows to erase parts of existing shapes or add new parts to existing shapes. The background combination mode is available as a new drop-down button in the toolbar.
  • A "cell variant" generation function simplifies hiearchical editing. See Create Cell Variants for details about this feature.
  • General performance improvement of the render. This has been achieved by bitmap caching of cells and various optimisation measures.
  • Images now can be aligned with a layout using landmark points. The possible image transformations now include shear and perspective distortions. See Using Landmarks To Align Images

  • Images can now be stacked and moved to the bottom and to the top.
  • The configuration now is stored along with additional configuration data (i.e. libraries) in a per-user directory in "~/.klayout" on Linux and in the application data path on Windows. The configuration file now is found there and is called "klayoutrc". New locations can be added using $KLAYOUT_PATH.
  • The database unit of the layout can be changed now in the layout properties page (menu: "File/Layout Properties").
  • Most numeric input boxes now accept formulas, i.e. "1254+3221" instead of a single value.
  • By clicking a on single point multiple times you can now cycle the selection through all objects below the point.
  • Layers can be copied (menu: "Edit/Layer/Copy Layer").
  • The selection can be duplicated (menu: "Edit/Duplicate" or Ctrl+B).
  • The size of the default font can now be adjusted (choose between small (current), medium and large on the Display/General page of the setup dialog).
  • The number of points used for circle interpolation can now be adjusted on the Application/Circles page of the setup dialog.
  • Some changes to make the user interface more consistent, i.e. "Synchonized views" has been moved to "Display" where most users where expecting it to be.
  • The selection now can be moved with the cursor keys in move mode.
  • The cell selection dialog allows to specify glob pattern wildcards in the filter box now.
  • OASIS CBLOCK compression and strict mode writing is supported now.
  • Multiple cells now can be selected in the cell tree. Some functions operate on that set (i.e. delete, copy, hide).
  • KLayout now has a LEF/Def import feature. See About LEF/DEF Import for details. This feature is somewhat experimental. Feedback is welcome about that feature.
  • Minor enhancements and bug fixes too numerous to mention here. Just try it out. Maybe your favorite bug is gone now ...

Version 0.21.19

Release date: 2012-06-19


  • Gerber file reader enhancements: Negative contrast layers supported now with an option to provide a background and 'real' inversion.
  • Gerber reader bugfix: SR command implemented correctly now also for negative contrast.
  • Enhancement: transient selection markers are drawn over other markers for better visibility.
  • Bugfix: XOR tool can be canceled without crash.
  • Fixed build problems with gcc 4.7.0.
  • Fixed a layout import bug (cells have been deleted which should have been kept).
  • OASIS writer bugfixes: don't accumulate rounding errors when writing type 0 or type 1 pointlists. Avoid writing invalid type 0 and 1 pointlists in certain cases.

Version 0.21.18

Release date: 2012-05-14


  • Gerber file reader enhancements: SR (step-and-repeat) is supported now.
  • Gerber reader bugfix: AM macro expansion was not done correctly sometimes.
  • Gerber reader enhancements: removed some superfluous warnings.
  • CIF writer: convert OASIS circles correctly to "R" round flash primitives.
  • Bugfix: copy & paste of layers in the layers tree now works and the copied layers are pasted to the current position.

Version 0.21.17

Release date: 2012-04-12


  • The memory footprint of 8-bit images has been reduced significantly.
  • The "Save current cell as" bug (see here) has been fixed: this function now works as expected.

Version 0.21.16

Release date: 2012-03-05


  • GDS format readers and writers now support time stamps: by default, the current time is written to the files. This option can be turned off in the "Save Layout Options" to simplify comparison of binary files for example. In addition, the timestamp of the BGNLIB record is read and displayed in the "Layout Properties" page.
  • The GDS reader now is somewhat less strict and also accepts certain broken versions (i.e. missing ENDEL records).
  • Several bug fixes related to scripting applications: Proc objects are held by the application now, Application does not abort in non-GUI mode in operations that take some time and try to display a progress bar.
  • DXF bugfix: layer names now do no longer contain blanks which made files unreadable by other tools like AutoCad.
  • Bugfix: foreground objects (i.e. rulers) are now correctly rendered in printout.

Version 0.21.15

Release date: 2012-01-22


  • Bugfix: the correct initial cell now is selected. Formerly, the largest cell was selected even it is was not a top cell.
  • "Show only selected" in the layer panel does not clear the selection any longer.
  • GDS reader now is less strict with respect to record order of STRANS, MAG and ANGLE.
  • Excellon drill file reader is now conforming to the specification in many respects.
  • Instances are not selected if the cell does not contain shapes in visible layers.
  • Marker browser does now work correctly when layer view transformations are present.
  • DXF reader enhancements: read LAYER table and assign GDS layers in that order, except for layer which got a layer name through their name (i.e. L1D100). Bugfix: don't suppress INSERT's if the layer is not mapped. Write TEXT and MTEXT correctly (multi-line support, small chunks for MTEXT, character alignment). New option: keep all cells for DXF reader. Added elliptic interpolation edge type (not really tested yet). HATCH objects with bulges and various edge types are implemented now. MTEXT supported now. New option: convert text to polygon for unicode support.
  • Changed default sorting of layers: always sort by layer number first, even if there is a name. If there is no layer number, sort by name.

Version 0.21.14

Release date: 2011-11-28


  • "Synchonized views" and "Select top level only" configuration shortcuts added to the "Views" menu.
  • Gerber reader bugfixes and enhancements: less strict parsing of aperture definitions, rotation of aperture macro elements is not considered correctly. Enhanced drill file reader.
  • Disabled cell copy & paste in viewer mode (was not working correctly).
  • Bugfix: it was possible to create an invalid configuration when removing all default stipples (lead to a crash on the next KLayout start).
  • Bugfix: an error appeared when switching the tabs in the layer panel in certain configuration involving groups.
  • Correct initialization of ruby interpreter to support Ruby 1.9.2 and later.
  • Bugfix: marker browser was only partially reporting collected markers for certain categories.
  • XOR now has an option to make use of multiple cores using a configurable number of threads.
  • Bugfix: reset of configuration required a restart.
  • Bugfix: OASIS reader now is more robust against overflow for g-deltas.
  • GDS reader enhancement: An invalid angle (outside the range of -360 to 360 degree) now is no longer an error and the angle is automatically restricted to the valid range.

Version 0.21.13

Release date: 2011-09-19


  • A bug in the clip function was fixed which was related to empty cells (reported in the forum)
  • By default, the first level of hierarchy is shown now if a new layout is opened. That feature can be adjusted using the "Default levels of hierarchy" setting on the "General" page in the setup dialog.
  • For multiple top cells, the cell with the larges footprint is selected initially.
  • A simple print function (available in the "File" menu)
  • Support for command 93 in CIF (AREF)
  • Improved handling of single point paths. In particular with round ends. They now render a circle in OASIS. In reverse, OASIS circles now render single-point paths with round ends in GDS.
  • Ruby scripts now work more reliably under ruby 1.9 (i.e. Windows binary). Formerly, some operations failed due to improper initialization of the encoding system (i.e. Dir.glob).
  • Clean uninstaller under Windows (removes all registry entries).

Version 0.21.12

Release date: 2011-07-29


  • Bugfix: GDS2Text format was not recognized correctly in some cases.
  • Texts: strings with line breaks can be edited now (line breaks are shown as \n). Text size is shown more realistic now. Alignment flags are supported in GDS2 and can be edited now.
  • Layer and datatype is shown in addition to OASIS layer names in the layer list. The old behaviour can be configured by unchecking the "Always show layer and datatype" checkbox on the "Layers" page in the setup dialog.
  • For most file dialogs, the specific filter is the default now (i.e. "*.lyp" is default instead of "All files" for the layer properties file dialogs.)
  • There is a "all layout files" filter for the layout file selection dialogs.

Version 0.21.11

Release date: 2011-06-26


  • Bugfix: command line option -p was not working correctly.
  • Bugfix: writing layouts with large coordinates was producing invalid OASIS files in some cases.
  • The tarkit now contains the files necessary for a build with Visual Studio on Windows.

Version 0.21.10

Release date: 2011-05-07


  • Bugfix: content of cell was not shown correctly when the cell was moved.
  • Bugfix: PCB import was not working properly (Bottom mounting mode was broken, top cell and dbu were not set correctly when a PCB project file was imported directly).
  • Bugfix: RVE reader was not correctly handling check names with a dot.

Version 0.21.9

Release date: 2011-04-20


  • Bugfix: Loading of layer files with tabs was not working properly: the first tab's name was discarded.

Version 0.21.8

Release date: 2011-04-06


  • Bugfix: navigator was broken. It was not functional if KLayout was closed with the navigator open.

Version 0.21.7

Release date: 2011-03-24


  • DXF bugfixes (arc interpolation of polylines).
  • Performance enhancement of "test for shapes in view" feature of layer list.

Version 0.21.6

Release date: 2011-02-20


  • DXF enhancements (support for bulges for polylines).
  • Bugfix: RBA::Edge.intersect? reports intersections correctly also if edges are collinear.
  • Performance bugfix: selection was slow for certain cases of hierarchy.

Version 0.21.5

Release date: 2011-02-03


  • DXF enhancements (some polylines now have the correct width).
  • An option to select how instances are placed (at origin or lower left corner of bounding box).
  • Bugfix: when placing an instance at the lower left bounding box corner, it is guaranteed that the origin is on grid.
  • Stable operation on UTF-8 filesystems and with non-english locales on Linux (i.e. consistent use of dot as decimal point). However, UTF-8 file names are not correctly displayed although the file is opened correctly. This will be fixed in the next major release.

Version 0.21.4

Release date: 2011-01-19


  • Correct installation of the image reader plugins for the Windows packages.
  • Bugfix: rotate counterclockwise was clockwise and vice versa.
  • Bugfix: "draw border instances of arrays" feature was broken.
  • Fixed a ruby crash on some systems (related to an initial 'require' on a ruby module loaded with -rm).
  • CIF reader enhancement: "DS" statements are now accepted with a single value also.
  • The Windows installation now also includes the standard Ruby modules.

Version 0.21.3

Release date: 2010-12-27


  • DXF reader and writer enhancements. The reader now allows to specify how POLYLINE entities are read. In most cases, the "Automatic" mode will be appropriate. The writer was enhanced by providing an option which determines how to write polygons. The default method is POLYLINE. A comprehensive description of the DXF format, as KLayout understands it, together with a description of the modes, is given here.

Version 0.21.2

Release date: 2010-12-19


  • RBA bugfix: RdbItem.each_value was not working on const references.
  • DXF reader and writer enhancements for improved interoperability with other tools.
  • Unit option for DXF input (to specify the units of the drawing).
  • Bugfix: layer mapping was not working correctly for DXF and CIF output.

Version 0.21.1

Release date: 2010-12-06


  • Added cell margins for fill utility.
  • A couple of bugs fixed (related to Diff tool, marker database reader, Ruby scripting).
  • Source is compatible with earlier versions of Qt now (down to 4.2.3).
  • Bugfix: persistency of reader options was broken.
  • Enhanced DXF and CIF reader and writer functionality with improved compatibility with other systems.

Version 0.21

Release date: 2010-11-28


  • Support for DXF format (reading and writing).
    ASCII and binary format are supported. There is an open issue how to represent layouts with multiple top cells. Currently, the ENTITY section is always empty and all cells are put into BLOCKS sections.
    DXF units will be micron and the database unit must be selected manually when layouts are read.
  • Support for CIF format (reading and writing).
    There is an open issue how to deal with paths. By default, CIF states that paths are supposed to have round ends. Obviously that interpretation is not commonly used. Options are provided which control how path objects are read and written.
  • Tabs for the layer panel. This feature is explained here.
  • Flat cell list and cell list sorting modes. The feature is explained here.
  • Dockable tool boxes.
    Layer list, cell list, layer toolbox and navigator are now dockable and can be dragged to another location, torn off the main window or closed with Qt's standard dockable window controls. The position and the state of the dockable windows is saved in the settings and session files.
  • A ruler embedded in the background image.
    Now, a small ruler is embedded into the background which shows the dimension scale similar to a map. It can be disabled in the setup dialog on the "Display/Background" page.
  • Image quality enhancement by oversampling. The feature is explained here.
  • The "Diff" tool. The Diff tool produces a marker database containing a description of the differences. A detailed description can be found here.
  • Snapping to objects is provided as an option for edit mode. In this mode, the mouse snaps to vertices and edges of visible objects. This mode can be enabled with the "Objects" checkbox on the "Editor Options" page (F3 key or "Edit/Editor Options" menu).
  • The reference point for the placement of instances now is the lower left point of the placed cell's bounding box, not the origin.
  • Dialog geometry persistent now.
    Marker, shape and instance browsers now save their geometries and splitter pane configurations when the application exits.
  • Instance placement now uses bbox origin, not cell origin.
    This simplifies placement of cells with their origin not aligned with the content.
  • Fill (tiling) tool. The tool is found in "Edit/Utilities/Fill Tool". A detailed description can be found here.
  • In some places, particular in the ruler display string, expressions can be used. For rulers, the previous display string placeholder scheme is replaced by the more powerful expression expansion scheme (see Ruler properties for details).
  • Build support for VC++ and Visual Studio 2010. The Windows 64bit build now is based on that environment. Note: Visual Studio 2010 no longer supports Windows 2000. To use KLayout on Windows 2000, a legacy build based on MinGW is provided.

Version 0.20.2

Release date: 2010-05-25


  • Bugfix: marker browser crashed when opened from menu and the maximum number of markers was set differently from default.

Version 0.20.1

Release date: 2010-05-23


  • Navigator now allows to drag a zoom box in the usual way.
  • Paths with odd width (in database units) are shown correctly.
  • Some bugfixes (for a list of fixed bugs see Known bugs in version 0.20) concerning the net tracer and the Gerber import feature.
  • Support for Ruby 1.9 (experimental).
  • Support for 64 bit Windows (experimental).

Version 0.20

Release date: 2010-05-01


  • Import option for Gerber PCB data ("File/Import" menu entry). Details about this function can be found in the Importing Gerber PCB files section in the advanced features manual.
  • A function to import another stream file into the current file. This avoids having to use copy & paste and provides a couple of nice options. Details about this function can be found in the Importing other layout files section in the advanced features manual.
  • A simple XOR tool providing a flat XOR between two layouts. A tolerance can be set to suppress small deviations. A tiling option is provided to reduce memory requirements for large layouts. The flat approach probably limits the application to "almost flat", small to medium sized layouts. Details about this function can be found in the The XOR tool section in the advanced features manual.
  • A net tracing tool to trace single nets of conductive layers connected through via shapes. The function is intended for extracting single small nets and it's not performance optimized for the case of huge power nets. Details about this function can be found in the The net tracing feature section in the advanced features manual.
  • A navigator window that shows current view's rectangle and allows to control the rectangle by dragging or resizing it.
  • Multi threading support for drawing increases the drawing performance on multi-core CPU's by rendering different layers on different CPU's. The number of threads to use can be set in the setup dialog in the "Display" group under "Optimizations". By default, a single thread is used.
  • "Make array" method ("Edit/Selection" menu) to multiply the selection into an array arrangement.
  • A function to add a layout already loaded to a view ("File/Pull In Other Layout").
  • A function to scan a layer's geometry and create a marker database from that. The menu function is found in the "Tools/Verification" menu. It will scan all selected layers either flat or hierarchical and create a marker database containing the shapes as markers.
  • Layer mapping on input: the reader options now allow to specify a mapping together with a layer specification. In addition to specifying the layers to read, a target can be given which specifies which layer the shapes will be stored under (See "Reader Options" dialog found in the "File" menu).
  • A couple of new display options:
    • Abstract mode (shows only the outer interfacing shapes of child cells.
    • Child hierarchy level layout can be configured to be shown in different brightness, hollow fill or static neutral color to differentiate top level from bottom level layout.
    • Enhancements for the hierarchy level specifications in the layer source notation.
  • A log viewer is provided to catch warning messages. The menu entry to open the log viewer is found in the "File" menu.
  • The setup dialog has been reorganized to make room for more property pages.
  • Instances now show the cell's content when being moved instead just a rectangle. This feature can be disabled.
  • Various usability enhancements (i.e. mouse cursor now shows activity, status bar shows short shape statistics etc.).
  • An option to not write empty cells.
  • Support for missing cells in the input layout: those cells get marked and are not produced in the output unless they have received content. That allows to load and save layouts with missing cells without producing empty cells for those missing cells.
  • Some new functions in the layer list context menu ("Show All", "Hide All", "Show Only Selected").
  • Various bug fixes (i.e. for clip function).
  • A couple of new RBA methods.

Version 0.19.3

Release date: 2009-12-17


  • Some bugfixes (for a list of fixed bugs see Known bugs in version 0.19.2).
  • To specify the installation path (where the ".rbm" files are looked up), a new environment variable "KLAYOUT_PATH" is provided. This variable currently supports a single entry only. In that sense it's not a "path" right now.

Version 0.19.2

Release date: 2009-12-05


Version 0.19.1

Release date: 2009-11-30


Version 0.19

Release date: 2009-11-21


  • Images: it is possible now to load image files (JPG, GIF, TIFF etc.) and display them below the drawn layout. The display of the images can be adjusted in many ways, i.e. placement, scaling, rotation, mirroring, color/contrast/brightness adjustments and false color mapping for gray level images. Images are fully supported by RBA.
    The feature is described in detail in Adding images.
  • Marker browser: the marker browser is based on the report database (RDB). This is a new concept that has been introduced as a container for report items, in particular marker objects but also for a number of additional annotations including screenshots for documentation. An import of Calibre DRC databases is provided. The RDB is fully supported by RBA.
    The feature is described in detail in The marker browser.
  • Some enhancements for the layer views: invisible layers are now shown differently in a "collapsed" way. Thus, the layer's colors and styles are still recognizable. The new features are described in detail in Telling used from unused layers.
  • In the layer list, unused layers can now be hidden and layers without shapes in view can be marked unused or hidden. The normal mode of marking layers unused when the cell does not contain any shapes at all is still available. Both modes are available as checkable items in the layer list's context menu.
  • A "View" menu has been added with fast access to certain display options, i.e. turn grid on an off. A number of default grids can be defined for quick selection in the "View" menu. On request, the tool bar can now be hidden as well as the layer and hierarchy lists.
  • A key binding editor is provided. This way, all menu functions can be assigned arbitrary key shortcuts in a more comfortable ways.
  • The mid mouse button can be used to pan (drag) the view window now.
  • Various RBA enhancements, i.e. a method to compute the intersection point between edges.

Version 0.18.2

Release date: 2009-11-05


  • Enhancements for building with gcc 4.4.x and Qt 4.5.x.
  • OASIS reader now also supports text objects with forward references to text string definitions.

Version 0.18.1

Release date: 2009-08-02


Version 0.18

Release date: 2009-07-07


  • Some bugfixes (for a list of fixed bugs see Known bugs in version 0.17.2).
  • Added support for the GDS2 text format. This is a contribution by Romain Gauci from Oscillated Recall Technology (
  • Session persistence: sessions (files, layers, bookmarks, setup) can be saved and restored. Details for this feature can be found here.
  • Reader options can be specified in a dialog now (File menu). Some GDS2 specific reader options are available: allow multi XY, allow big records and several box record handling modes. Details for this feature can be found here.
  • GDS2 specific writer options (max vertex option, multi XY record option, max cell name length).
  • The stipple palette now is editable. A corresponding page has been added in the setup dialog.
  • Flatten cell function. A cell can be flattened which will remove the cell and all the subcells unless not specified otherwise. This function can be found in the cell's context menu. Details for this feature can be found here.
  • The 'Make Cell' operation provides a nice origin now. Before, the origin of the new cell was far off sometimes.
  • Accept drag & drop of .lyb, .lys, .lyp, .rb, .rbm and layout files.
  • Switched to standard file dialogs where this has not been the case yet. In particular on the Windows platform, the application will behave somewhat more consistent.
  • Added an option to draw only border instances of arrays. This option can be found on the 'Misc.' tab of the setup dialog.
  • Added the capability to define global ruby modules using the ".rbm" extension and putting them into the installation directory.
  • Full cell copy & paste functions can now be found in hierarchy panel context menu.
  • Enhancement of grid snapping in partial mode. Before, a offgrid vertex could not be brought on-grid because movement was confined to grid steps.
  • Number of points for polygons is shown now in the polygon property dialog.
  • Hole resolution for GDS2 and OASIS writer. Before, polygons with holes (which can be produced by scripts) were rejected.
  • Some bugfixes for clip, using booleans for clip to overcome some problems with hole connectors and spikes - slow but safe..
  • '#' character is not longer used when creating cell variants - instead '$' is used to enhance the compatibility with other tools which do not allow the "#" character as part of cell names.
  • On paste, a 'fit selection' is done to show what has been pasted.
  • Mouse wheel mode is configurable now (shift/ctrl modifier behaviour). The 'alternative mode' can be found on the 'Misc.' tab in the setup dialog.
  • Option to clear all rulers when cell is changed. This option can be found on the 'Misc.' tab in the setup dialog in the 'On Cell Change' group.

RBA enhancements:

  • A new class: ICplxTrans and related functions.
  • A recursive shape iterator simplifies hierarchical region queries and "as if flat" traversal of cells.
  • Polygon: hull and hole can be assigned now, compress method, point accessors.
  • The installation path now is available.
  • Added a method which allows to display a message in the status bar.
  • The transient selection now is available for RBA procedures.
  • New events are generated if selection and transient selection changes.
  • Added a generic assign method for copyable objects.
  • Added new classes 'LayerMap' and 'LoadLayoutOptions'.
  • Added two 'read' methods to Layout class.
  • Added a couple of methods to 'LayerInfo' (constructors, compare, ...).
  • Added a 'load_layout' method to LayoutView.
  • Added more cm_* methods to MainWindow.

Version 0.17.2

Release date: 2009-04-20


  • Some bugs are fixed now (for a list of fixed bugs see Known bugs in version 0.17.1).
  • The GDS2 writer now normalizes AREF records. This way compatibility with other EDA systems is enhanced.

Version 0.17.1

Release date: 2009-03-27


Version 0.17

Release date: 2009-03-23


  • Various layer operations are now available: boolean operations (AND, XOR, NOT), layer merge and sizing. For a detailed description see Layer boolean operations and Layer sizing. These operations are also available in RBA (see RBA::EdgeProcessor and RBA::ShapeProcessor).
  • Boolean and sizing operations are also available Shapewise boolean operations and Shapewise sizing.
  • Objects can now be aligned. For a detailed description of the alignment function see Object alignment.
  • The cell origin can be adjusted relative to the cell's bounding box. For a detailed description see Cell origin adjustment.
  • A 'corner rounding' function has been implemented to support soft-cornered layout which is common in power applications. For a detailed description see Corner rounding.
  • Various layer operations are now implemented in edit mode: clear layer, delete layer and edit layer properties. For a detailed description see Layer operations: clear, delete, edit specification.
  • The selection can now be scaled (The "Scale" function is available in the "Selection" submenu of the "Edit" menu).
  • An option is available that allows to select all hierarchy levels automatically when a cell is opened (found in the "Misc." tab of the setup dialog: "Select all hierarchy levels" must be checked).
  • Various bug fixes (i.e. see Known bugs in version 0.16.1).

Version 0.16.1

Release date: 2009-01-07


Version 0.16

Release date: 2008-12-27


  • Some new editing capabilities: flatten, make cell, clear layer and a clip function.
  • Some RBA extensions, in particular the ability to modify layout by deleting shapes and instances, replacing and transforming them, changing property handles etc.
  • Support for global preset of configuration (through a file called "layviewrc" beside the executable binary) and a global RBA initialisation file (a file called "rbainit" beside the executable binary).
  • Transient selection: indicates by a faint selection marker what object is below the mouse (can be disabled).
  • The layer specification (layer, datatype, name) can be now be edited which allows to move a complete layer to a different one.
  • Undo buffering can now be disabled on the command line with the '-i' option. This saves the memory otherwise required for storing the replay information.
  • Directional constraints can be modified by using the Shift and Ctrl modifiers on various operations such as rulers, movement, drawing etc.
  • Now there is a 'most recently used' list ("Open Recent" in the "File" menu) which shows the last layouts opened for easy re-opening.
  • Reduced memory requirements for particular OASIS constructs (random repetitions)
  • The instance browser now has a "Choose cell" button where the cell can be chosen whose instances will be presented.
  • For most editing operations, the status bar will now indicate more detailed informations such as move distance.
  • Pasted shapes and instances now are selected initially.
  • Enhanced OASIS compression mode (can be chosen from the options dialog on saving). Reduces file size considerably by creating regular shape arrays if possible at the cost of higher memory consumption and longer writing times.
  • Various bug fixes (i.e. see Known bugs in version 0.15).

Version 0.15

Release date: 2008-08-16


  • Editing capabilities. "klayout" in it's basic form still operates as pure viewer. However, a mode is available that enables editing capabilities. See Editor mode quickstart manual for a more detailed description
  • Some RBA extensions: i.e. conversion from "double" type polygons to "integer" type ones.
  • A default layer table can be configured in the "Application" tab of the setup dialog. This table will be loaded whenever a layout is opened or created.
  • A installer for Windows is provided now.
  • Properties are supported on instances now as well.
  • Code is compatible with gcc 4.3.0 now.
  • Enhanced compatibility with SunStudio 11 compiler (in particular in RBA).
  • Various bug fixes (i.e. in GDS reader and OASIS writer).

Version 0.14

Release date: 2008-04-04


  • Several RBA extensions: i.e. alternative methods replacing different 'new' variants by one 'new'. Markers now can be filled.
  • Fixes for the bugs mentioned in the issues list.
  • OASIS and GDS writing capabilities. Menu functions are provided to save a layout and single cells as well as RBA extensions that allow to write a layout. See Saving a layout or parts of it for details.
  • Rulers and markers are drawn with a thin halo in background color to enhance their visibility. This can be switched off in the setup dialog if this is not desired. The following screenshots illustrate the differences:
    With haloWithout halo

Version 0.13

Release date: 2008-01-16


  • A couple of RBA extensions: API's for shape properties, rulers and geometry selections.
  • A bugfix for the OASIS reader (sometimes crashing the reader on CBLOCK-compressed input)
  • A function to descend into a cell in the hierarchy but keeping the context, which is shown in dimmed colors. This function can be found in the "Display" menu and is called "Descend". To use this function, select a shape or instance inside the cell into which to descend. "Descend" then enters the next cell along the path that leads to the selected shape or instance.
  • The mouse wheel can be used to zoom in and out.
  • Shift+right mouse button pressed now allows to "drag" layout in a "Google maps" fashion.
  • Copy & paste now is available for layers as well.
  • A ruby console is provided where ruby commands can be executed interactively.
  • The way how the selection is displayed can be configured now (color, line width and vertex size).
  • The interrupt signal now is enabled again even if Ruby is activated (Ctrl+C now works again).

Version 0.12

Release date: 2007-11-02


  • Support for arbitrary angles on cell instances.
  • A bugfix for the OASIS reader (CTRAPEZOIDS have not been read in some cases). The OASIS reader now uses shape arrays to achieve are smaller memory footprint in some cases.
  • Multiple transformations are now allowed on layer source expressions (see Transforming views and property selectors for a detailed description).
  • Rulers now are configurable to a large extent. Multiple ruler templates may be defined from which a certain ruler type can be chosen. Some of the new ruler styles are no longer "rulers" but rather "annotations". See Ruler properties for a description of that feature.
  • Last, but not least: KLayout now can be scripted to some extend using Ruby as the scripting language. For more information about this feature, see RBA introduction.

Version 0.11

Release date: 2007-06-26


  • Some bugs were fixed in the OASIS implementation. CBLOCK compression now is supported. Forward cell name references (numerical ID is used before being associated with a string) are supported as now. File global properties are now read correctly. A bug reading certain CTRAPEZOID objects was fixed.
    (Still, forward references are not allowed for text/property strings or property names).
  • A layout properties dialog has been added that shows basic properties of the layout such as top cells, layers and others.
  • The "Select Cell" dialog has been enhanced with the capability to hide and show multiple cells in the cell list.
  • A "zoom fit" mouse gesture was implemented: moving the mouse up and right with the right mouse button pressed now fits the current cell into the window. Moving up and left still zooms out.
  • A bug in the GDS2 reader, dropping polygon points in rare cases, was fixed

Version 0.10

Release date: 2007-05-07

Tarkit: klayout-0.10.tar.gz


  • The build script has been enhanced and supports Qt installations with different locations for binaries, libraries and headers. See the Build section for details about this.
  • OASIS files can be read as well now. The reader automatically determines the kind of file. OASIS layer names are supported. Due to the complexity of the OASIS specification, or more precisely the effort required to test a reader for meeting the specification, OASIS support currently is regarded to be in "beta" state.
  • Layers can now be organized hierarchically. Layers can be grouped which allows to control visibility and other properties for the group as a whole. Layers can be removed from the layer view list or new layer views can be created.
  • The layout can be transformed (rotated, shifted, mirrored) now. This transformation is specified in the layer panel as a part of the layer source specification. An optional transformation can be applied per layer or layer group. This way for example, different layouts can be aligned over each other.
  • Shape properties now are supported. Each shape may carry optional properties that are read from GDS or OASIS files. A property selector can be applied per layer view, so that a layer only shows these shapes that match the given property selection.
  • As an experimental feature, the inverse layout tree can be visualised by allowing the minimum hierarchy level to go into the negative range. The effect of this is, that a cell is shown in the context of all of it's direct parents, if the first hierarchy level is set to -1. If set to -2, the cell is shown in the context of all of it's parents and grandparents and so on. Since there is no particular optimization for this feature, performance may be poor, if a cell must be painted in a huge number of contexts. In addition, the context displayed does not participate in selection or ruler snapping.

Version 0.9

Release date: 2007-03-01

Tarkit: klayout-0.9.tar.gz

This was the first official release