graphviz

Changed

• When using dl_iterate_phdr to discover the plugin directory, the default compiled-in plugin directory is only overridden if dl_iterate_phdr successfully discovers the plugin directory. Previously if the dl_iterate_phdr search failed, the plugin directory would be considered the empty string.
• The cells of an HTML table are now emitted after the table border and rules. The main effect of this is, when post-styling a table with CSS, cell content remains visible. I.e. Z-ordering is more intuitive.

Added

• When using the fdp layout algorithm (dot -Kfdp … or fdp …), a new command line option -Lm… is supported for controlling the “m-limit”. See the man page for details about this option. #954
• The vt plugin has a new option for using Unicode octant characters to render 8-pixels-per-cell output, -Tvt-8up2.

Fixed

• When building from source from a Git checkout, builds with --disable-python/--disable-python3 once again work. This was a regression in Graphviz 14.1.3. #2839
• Gvedit no longer leaves temporary files on disk when previewing.

Changed

• The MinGW packages no longer have libgd-dependent components enabled.
• Breaking: The diffimg utility has been removed.

Fixed

• The JSON renderer of the core plugin now understands a cluster to be indicated by the common rules, including the “cluster” prefix being case insensitive and the cluster=true attribute as an alternative. #2187
• The description of what defines a cluster subgraph in the gc man page has been updated. #2187
• When rendering multiple files at once (e.g. dot -Tsvg -O file1.dot file2.dot), page numbering state from previous jobs no longer leaks into the current job. This was a regression in Graphviz 2.40.0. #2827
• Logic to determine whether a rendered page is non-first has been corrected.
• gvpr modulo expressions with an out-of-range modulo operand are now detected and result in an error message.
• When gvpr dumps switch statements as text, they are now printed as switch statements instead of an if-else ladder. This avoids incorrect interpretation of break statements in error messages. #2822
• An out-of-bounds read access during gvpr type checking has been fixed.
• A null pointer dereference when freeing xdot objects has been fixed.

Changed

• Enable ascii plugin to be built using autotools. #2828

Fixed

• Processing concentrate=true graphs no longer crashes Graphviz. Processing of concentrate=true graphs still often errors out. #2825

Changed

• Using long node names in combination with the fdp layout algorithm no longer results in truncated generated names.
• Vertical centering of text within HTML-like table cells has been improved.
• The existing ability to provide a numeric parameter to -v to specify verbosity level are newly documented in dot --help.

Fixed

• gvmap no longer dereferences a null pointer when reading position-less graphs.
• gvmap no longer crashes when adding coordinate data.
• mm2gv no longer accepts input matrices with non-real element type. Previously these would be accepted but processed incorrectly leading to out-of-bounds memory reads and writes.
• The Tcldot_Init, Tcldot_builtin_Init, and Tcldot_SafeInit symbols in tcldot.dll are externally visible on Windows. #2809
• The Tclpathplan_Init and Tclpathplan_SafeInit symbols in tclpathplan.dll are externally visible on Windows. #2809
• The Autotools build system more consistently uses $PYTHON3 instead of python3 when invoking Python. This ensures developers are more easily able to control the Python installation in use from the top level.
• The Autotools build system explicitly links against libglu libraries when linking against libglut.
• Corrected time formatting in verbose info/debug messages (enabled by -v). Previously, minutes was missing, showing HH:SS instead of HH:MM:SS.
• Further parts of the network simplex algorithm have been rewritten in a non-recursive style. This allows processing larger graphs that previously caused stack overflows. #2782
• Canonicalizing an empty string or a string entirely made up of characters needing escaping no longer triggers an out-of-bounds memory write. This was a regression in Graphviz 13.0.1. #2743
• An off-by-one error in the network simplex algorithm has been corrected. This could have led to suboptimal layout in some edge cases. This was a regression in Graphviz 13.0.0.

Changed

• Support for HP-UX has been removed.

Fixed

• On MinGW, Smyrna consistently uses / as a path separator.
• In the CMake build system, building a statically linked dot with the Quartz plugin enabled has been repaired.
• The configuration files exported by the CMake build system have an additional install interface of include, adding to the existing include/graphviz. The effect of this is that code using these files to access Graphviz headers can now prefix their include paths, e.g. #include <graphviz/gvc.h> instead of #include <gvc.h>. #2798
• The colorscheme attribute when applied to edge labels works once again. This was a regression in Graphviz 11.0.0. #2801
• The dpi and resolution graph attributes are now constrained to a minimum value of 0.0. This was already stated in the documentation but not enforced by the code.
• Compilation from source no longer fails on Solaris with symbol conflicts due to lock_t usage. #2802
• When compiling Graphviz from source, _FILE_OFFSET_BITS is set consistently in all compilation jobs. #2803

Changed

• When seeding random number generators with time(NULL), the result of getpid() is no longer also mixed in. Previously this was the case on non-Windows platforms, impeding reproducibility and portability.

Fixed

• In the CMake build system, when WITH_SMYRNA is AUTO or unset, Smyrna enabling depends on the presence of Pangocairo.
• In the CMake build system, versions of dot with plugins built in are only linked against enabled plugins. #2795

Added

• Added option neato -n3 for fit ends of edges to nodes' borders when edge trajectory is set. #2736
• Orthogonal edges now support rounded corners via the radius edge attribute. When splines=ortho is set and an edge has radius > 0, corners are rendered as smooth arcs instead of sharp angles. The radius value controls the size of the corner arc. Default is 0 (square corners).

Fixed

• Some Undefined Behavior in sparse matrix calculations has been removed.
• In the Autotools build system, when the PHP interpreter (php) is available but php-config is not, building the PHP bindings is no longer enabled. This was a regression in Graphviz 2.42.0. #2788

Fixed

• When filtering attribute lists, Smyrna no longer accesses out of bounds memory or misses results.
• osage should now handle clusters that become empty when nodes are incorrectly assigned to sibling clusters. #2721