Klayout

* Bugfix: %GITHUB%/issues/539
An internal error happened on netlist flatten sometimes
* Bugfix: %GITHUB%/issues/524
Failed queries leave layout in undefined state
* Bugfix: %GITHUB%/issues/525
Report true source line in DRC and LVS verbose mode
* Bugfix: %GITHUB%/issues/526
Makes script debugging more reliable
* Enhancement: %GITHUB%/issues/527
Wildcard layer mapping for stream readers
* Bugfix: %GITHUB%/issues/544
Duplicate .global statements in SPICE netlists created
duplicate pins
* Bugfix: %GITHUB%/issues/548
A shielding issue was fixed for DRC space measurements
* Bugfix: diff tool bug with paths
Differences in path points where no reported
* Enhancement: documentation clarifications and typos fixed

* Bugfix: %GITHUB%/issues/517
DEF reader could not read VIAS+VIARULE without pattern
* Enhancement: %GITHUB%/issues/471
Leaner way to specify LVS compare tolerances for device parameters
* Enhancement: %GITHUB%/issues/473
Direct access to image data in scripts (array of values instead of
per-pixel calls)
* Bugfix: %GITHUB%/issues/476
Issues with "target" switching in DRC solved
* Bugfix: %GITHUB%/issues/477
Missing letter "J" in Times font .. actually this bug is of 1967.
* Bugfix: %GITHUB%/issues/478
Layout queries could not use the "shapes" method
* Bugfix: %GITHUB%/issues/481
"isolated" DRC function reported duplicate marker shapes
* Enhancement: %GITHUB%/issues/482
"join_symmetric_nets" feature in LVS for implementing
"split gate" configurations
* Enhancement: %GITHUB%/issues/486
There is a "save as" function available now in the macro editor
(in context menu of the macro tree)
* Enhancement: %GITHUB%/issues/489
Pin names can be attached as properties to port and pin shapes
when reading LEF or DEF
* Bugfix: %GITHUB%/issues/491
Performance enhancement of L2N/LVS DB file loader
* Bugfix: %GITHUB%/issues/496
Fixed builds on CentOS 8 and Fedora 31
* Enhancement: %GITHUB%/issues/500
Option to limit number of shapes for net tracer
* Bugfix: %GITHUB%/issues/501
Issues with ownership transfer fixed in Qt binding
* Bugfix: %GITHUB%/issues/502
Issues with AbsoluteProgressReporter in scripts fixed

* Bugfix: %GITHUB%/issues/466
A crash happened when accessing layer properties tabs with
an invalid index in Ruby or Python
* Bugfix: %GITHUB%/issues/464
Problem building a layer tree with "add_child" (Ruby/Python)
* Bugfix: %GITHUB%/issues/463
Configuring a layer color with a group node was not effective
over multiple levels of hierarchy
* Enhancement: %GITHUB%/issues/462
MOS transistor gate figures can be more generic now,
e.g. ring-like or non-rectangular
* Bugfix: %GITHUB%/issues/458
A net extraction bug related to certain array/array
interactions is fixed

* Bugfix: %GITHUB%/issues/453
A crash happened when the "inverse" button is used on the TEXT
PCell
* Bugfix: %GITHUB%/issues/449
The Qt windows styling plugin is now installed too on Windows.
* Bugfix: %GITHUB%/issues/448
The LVSDB database wasn't written with the proper device
class statements in short form.
* Bugfix: %GITHUB%/issues/447
Net extraction did not work properly on a specific test case
with folded and interleaving array instances.
* Bugfix: %GITHUB%/issues/445
"Selection/Merge shapes" gave cryptic message when instances are selected
* Enhancement: %GITHUB%/issues/444
Support for net joining though labels also for specific
subcells (here: to support double-height standard cells)
* Bugfix: %GITHUB%/issues/440
LayoutVieweach_annotation_selected wasn't working
* Enhancement: %GITHUB%/issues/438
Redefining a circuit in Spice netlists will give an error now
* Enhancement: %GITHUB%/issues/436
Option to silence instance copy mode dialog,
Enhancements to interactive move, duplicate and copy (sensitive
to transient selection now)
* Enhancement: %GITHUB%/issues/434
New preinstalled Ruby gems and Python packages (e.g. numpy, scipy,
test/unit for Ruby) for the Windows packages.
* Bugfix: %GITHUB%/issues/429
Support for MAGIC file format (*.mag)
* Enhancement: %GITHUB%/issues/428
Edit buttons are not shown in user properties dialog
in viewer mode
* Enhancement: %GITHUB%/issues/426
Techs can be grouped in menu now
* Enhancement: %GITHUB%/issues/425
Don't generate dummy pins for dummy gates
* Bugfix: %GITHUB%/issues/419
Multiple top circuits after flatten of netlist
* Bugfix: %GITHUB%/issues/417
Probe nets does not work with flat extraction on Tools/Trace All Nets/Flat
* Bugfix: %GITHUB%/issues/415 and %GITHUB%/issues/439
Macros need to be stored with CRLF on Windows for management
with a versioning system like git
* Enhancement: %GITHUB%/issues/411
Multiple device extractors for same class
* Bugfix: %GITHUB%/issues/410
Errors were not reported on "rerun" from the DRC and LVS report dialogs
* Bugfix: %GITHUB%/issues/408
Internal error after EdgePairspolygon
* Enhancement: %GITHUB%/issues/407
Variables can be used in technology base path now
- $(tech_name) -> substituted by the technology name
- $(tech_dir) -> substituted by the directory the technology file is stored in
- $(tech_file) -> substituted by the absolute path to the tech file
- $(appdata_path) -> substituted by KLayout's home directory (e.g. ~/.klayout)
- $(env('X')) -> substituted by the environment variable $X
* Enhancement: %GITHUB%/issues/406
DRC edge layers: AND between intersecting edges gives point-like
markers indicating the intersection points
* Enhancement: netlist object properties
User properties can be attached to the following netlist objects
now: Pin, Device, Circuit, Net and SubCircuit. Properties are
key/value pairs (keys and values can be strings can be strings
or numbers).
The property-enabled classes use "NetlistObject" as the base
class now. NetlistObject provides "set_property" to set or reset
a property and "property" to retrieve one.
Properties are persisted in L2N and LVSDB files and written to
layout shapes on "build_nets".
* Enhancement: more detailed progress
On certain nested operations, a double or triple progress bar is
shown indicating the progress of nested operations.

* Bugfix: %GITHUB%/issues/354
Buddy scripts did segfault.
* Bugfix: %GITHUB%/issues/352
LVS: equivalent_pins required the cell to be present.
* Enhancement: %GITHUB%/issues/353
Session files: "file-path" and "rdb-file" behavior was inconsistent.
* Bugfix: %GITHUB%/issues/358
"strm2oas" was writing GDS files.
* Bugfix: %GITHUB%/issues/363
It was possible to produce bad polygons while drawing.
* Bugfix: %GITHUB%/issues/372
pymod build failed with HAVE_64BIT_COORD=1.
* Enhancement: %GITHUB%/issues/376
Parameters UI callback invoking.
* Bugfix: %GITHUB%/issues/368
Segfault with layer list manipulation while iterating.
* Bugfix: %GITHUB%/issues/386
"None" is a reserved keyword for Python binding - use "None_".
* Enhancement: %GITHUB%/issues/382
Possibility to copy user property value.
* Enhancement: %GITHUB%/issues/387
Salt: Python version can be specified in "api-version".
Other requirements can be specified too.
* Bugfix: %GITHUB%/issues/392
Layers "Style" sub-pane was malformed.
* Enhancement: %GITHUB%/issues/394
Even bigger font sizes for rulers and labels for the 4k age:
Now there is "XLarge", "XXLarge" and "XXXLarge" as well.
* Enhancement: %GITHUB%/issues/393
DRC syntax errors are now shown in their original code line
of the DRC script.
* Bugfix: %GITHUB%/issues/400
Snap feature wasn't working for deep regions in certain use
cases.
* Enhancement: new "scale_and_snap" methods
These methods allow scaling and snapping of layouts. Scaling
is supported by a rational factor. After scaling, snapping can
be applied to an integer grid. There are two incarnations.
Regionscale_and_snap (or Regionscaled_and_snapped): this is
a flat implementation which allows anisotropic scaling/snapping
as well.
And there is Layoutscale_and_snap which is a fully
hierarchical scale-and-snap feature. The latter does not support
anisotropic scaling/snapping, but works hierarchically without
opening gaps. It operates on a top cell and on all layers.
* Enhancement: new Regionpull_* methods and DRC features
"pull_*" is a class of methods that allows rehierarchisation
of shapes. These methods act similar to "interacting", but
the other way around: instead of delivering interacting
shapes of the first argument, it will deliver shapes of
the second argument. For example, "a.pull_interacting(b)"
will deliver polygons of b which interact with polygons
of a. As a side effect, the polygons of b will be stored
hierarchically close to the polygons of a. This provides
a way to "re-hierarchise" layout.
The full class of methods and DRC functions involve:
Regionpull_interacting, Regionpull_inside, Regionpull_overlapping
and the same functions for DRC.
"pull_interacting" is also available for the Edges class
and edge layers in DRC.
* Enhancement: Net tracer bug fix for heavily decomposed polygons
The net tracing feature now can operate on heavily decompose
polygons as well. Such layouts can be created by using a low
max. vertex count on GDS write. The problem were small
triangles with an area of 0.5 square DBU.
* Enhancements: General fixes of deep DRC mode
Some inconsistencies with merged/raw mode have been
removed. Performance was enhanced in a few places.
Multithreaded mode now works more reliably.
* Enhancements/bugfixes: various LVS improvements
The backtracking algorithm should work more reliable
in cases of ambiguities and floating nets or pins.
Performance should be better in some cases.
LVS script structure is less rigid now. "cheats" to
forcibly ignore hierarchy interactions for some
cells (useful for SRAM layout for example).
Still there is some work to do.

* Bugfix: %GITHUB%/issues/197
Python: Reimplemented methods are not getting called
* Bugfix: %GITHUB%/issues/236
Crash when using "Delete all rulers"
* Bugfix: %GITHUB%/issues/251
Register application exit handler in Ruby
* Bugfix: %GITHUB%/issues/264
Python exceptions are redirected when PCell is used
* Bugfix: %GITHUB%/issues/265
LEF file can't be read
* Bugfix: %GITHUB%/issues/277
Regionmin_coherence is not recognized by Regionsized
* Bugfix: %GITHUB%/issues/293
File/Setup menu and dialog names are inconsistent
* Bugfix: %GITHUB%/issues/294
Cannot display the right icon in Ubuntu
* Bugfix: %GITHUB%/issues/302
Display issues with small cells
* Bugfix: %GITHUB%/issues/305
CIF box positions are incorrect when a rotation is specified
* Bugfix: %GITHUB%/issues/306
Round corners issue
* Bugfix: %GITHUB%/issues/316
Text capture box has zero dimension for move
* Bugfix: %GITHUB%/issues/318
Unable to disable a key binding
* Bugfix: %GITHUB%/issues/321
Something's wrong with tip windows
* Bugfix: %GITHUB%/issues/322
CIF, error when changing layer name while file open in KLayout
* Bugfix: %GITHUB%/issues/330
DXF reader stalls
* Bugfix: %GITHUB%/issues/337
Annotation: make "cross" styles available for scripts
* Bugfix: %GITHUB%/issues/338
Unreadable Assistant document: QComboBox
* Bugfix: Rare crash fixed with line width > 1
With line widths > 1, segfaults have been observed in some
rare cases.
* Enhancement: %GITHUB%/issues/287
Return an ObjectInstPath from the RecursiveShapeIterator
* Enhancement: %GITHUB%/issues/317
"infix move"
* Enhancement: %GITHUB%/issues/333
Ruby/Python automation of "auto measure"
* Enhancement: %GITHUB%/issues/342
Ruler properties editor: swap points and snap to object buttons
* Enhancement: %GITHUB%/issues/343
Dockable bookmark window
* Enhancement: Hierarchical mode for DRC ("deep" keyword)
DRC can be put into hierarchical mode with the "deep"
statement at the beginning of the file.
In hierarchical mode, most operations are performed
in a hierarchical fashion - i.e. trying to maintain
as much from the original hierarchy as possible.
* Enhancements: Antenna checks for DRC
DRC now got an antenna check feature. Netlist extraction
is the basis for this feature.
* Enhancement: Hierarchical mode in XOR tool and "strmxor"
The XOR tool and the "strmxor" buddy tool provide
switches to enable hierarchical mode. These options
are considered experimental currently as XOR between
two different layouts was not the implementation goal.
* Enhancement: Netlist extraction
KLayout supports extraction of netlists from a layout.
This is the first step towards LVS. This feature includes
an infrastructure providing netlist data structures
(with Ruby/Python bindings), Netlist readers and writers
(Spice format), device recognition and a netlist browser.
* Enhancement: LVS
The LVS feature is based on the netlist extraction capabilities.
It adds netlist vs. netlist compare and the corresponding
infrastructure.
LVS is a new script environment that is based on the DRC feature
and extends the DRC script language by LVS elements.
* Enhancement: Command line option -mn to open netlist database
* Enhancement: Net tracer "trace all nets"
Based on the netlist extraction feature, an alternative mode
for net tracing is provided. With "trace all nets", no a single
but all nets are traced at once. Probing then happens in the
final nets extracted rather than providing the seed shape.
"Trace all nets" operates in hierarchical mode and therefore
usually is faster and has a smaller memory footprint when
extracting huge nets such as power nets.
* Enhancement: Library browser
The library browser is a dockable tool window which shows
all libraries installed. Use drag and drop to place a library
cell from the library browser in edit mode.
* Enhancement: Layout query enhancements
Layout queries (aka "Search and replace") now allow specification
of Variables when using the script API. The performance of queries has been
enhanced in the case of cell tree recursion.
* Enhancement: Gridline colors
The grid lines (or dots, depending on the style) can now be given
different colors for axes, grid lines and the ruler inset.
* Enhancement: Multiple files on import
The "File/Import/Other files into current" feature now allows
importing multiple files into the current layout.
* Enhancement: Python standalone module
KLayout supports production of standalone Python modules
which provide the same features than the "pya" module but
for use without the KLayout binary. If installed properly,
"import klayout" will pull in all modules. "import klayout.db"
will pull in the database part.
Deployment on PyPI is supported.
* Enhancement: Modal help dialog from modal windows
When using Assistant links in the UI, the assistant now is shown
as a modal window when called from a modal dialog. Before, the
Assistant window wasn't usable in this case.