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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
+
+## [3.1.10] - 2023-01-13 Henri Menke
+
+Even though this release is not too heavy on user-facing additions it has seen a
+lot of contributed changes. Thanks to everyone who volunteered their time!
+
+### BREAKING CHANGES
+
+- `\pgfversiondatetime` and `\pgfrevisiondatetime` have been removed.
+ `\pgfversiondate` and `\pgfrevisiondate` now use the format `YYYY-MM-DD`.
+ `\pgfrevision{,date}` and `\pgfversion{,date}` are synonyms for now, but the
+ revision should eventually gain back its original meaning. However, as of now
+ this is not supported by l3build.
+- Many operations in `pgfkeys` used to use `\csname` directly which lets the
+ given csname become `\relax` in case it wasn't defined. This resulted in some
+ leakage of accidentally `\relax`ed keys into the global scope. This has been
+ cleaned up a little. To preserve compatibility macros that used to expand to a
+ `\relax`ed csname now expand to a primitive `\relax`. This affects the
+ user-level commands `\pgfkeysgetvalue` and `\pgfkeysgetvalueof`. For the
+ former the change should not be visible except for the number of expansions
+ required. For `\pgfkeysgetvalueof`, however, the behavior is manifestly
+ different in that it will now expand to an alias for the primitive `\relax` in
+ case the value is undefined instead of a `\relax`ed csname. It has always been
+ semantically wrong to assign to the result of `\pgfkeysgetvalueof`, but now it
+ will have undesired side-effects. Therefore this change is breaking.
+- The `textures` and `vtex` drivers have been deprecated. Both engines are no
+ longer in active development and lack eTeX features which are required for
+ quite some time in PGF.
+- The file `pgfutil-common-lists.tex` is deprecated and therefore no longer
+ `\input` by `pgfutil-common.tex`. The macros from this file are specifically
+ meant for pgfplots and are not used in PGF at all.
+
+### Added
+
+- l3build support for packaging PGF/TikZ
+- Add Matrix chat to README
+- Add rhombic polihedra #1022
+- Add Developer Certificate of Origin (DCO) to Pull Request template and enforce
+- Add test set for `graphdrawing` (gd)
+- pgfkeys gained support for loading libraries
+- Add dependabot to keep GitHub Actions up to date
+
+### Fixed
+
+- Wrap logic gate symbol in `\pgfinterruptpicture` for shapes in library
+ `shapes.gates.logic.IEC`
+- Remove superfluous `;` for shape `arrow box`
+- Remove superfluous `/utils/exec` in animations
+- Gobble `\pgf@stop` when parsing finishes in animations
+- Add missing `\pgf@sys@tonumber` before `<dimen>` in drivers and animations
+- Rewrite `dash expand off`
+- Better unknown key error msg in decorations
+- Fix `\let` in drivers for two csnames #1088
+- Protect against comma in pgfkeys arguments #389
+- Let active `"` expand to non-active `"` in pgfmath #1062
+- Protect against comma in `/tikz/rotate fit` argument and make it
+ eagerly evaluated #1071
+- Set pics/code in angle #1068
+- Fix for externalization and horizontal mode
+- Avoid spurious tokens in `\pgfcalendarifdate` expansion
+- Remove angle restriction #1048
+- Fix compatibility of `external` lib with `fadings` lib
+- Only clearpage and flush `\pgfutil@everybye` if non-empty #724
+- Fix foreach documentation #1039
+- Fix pgfmathless documentation #1040
+- Blend mode as array is deprecated #1037
+- One-step expansion for `\pgfmathrandomitem` in pgfmath #1033
+- Check whether expanded is a primitive in all engines
+- Reinsert the last token when giving up on a path #1025
+- Make `/tikz/local bounding box` aware of `name prefix` and `name suffix`
+- Add empty Pattern dictionary to Resources dictionary
+- Spelling and typo fixes in the manual
+- Update Debian installation instructions
+- Suppress white space at line end when `datavisualization` reads from a file
+ #1112
+- Form-only patterns have no specified color #1122
+- Make `graphdrawing` work with `name prefix` and `name suffix` options #1087
+- pgfkeys was a bit too relaxed around `\relax` #1132
+- Remove spurious spaces for `3d view` #1151
+- Fix incorrectly placed matrix delimiters for implicitly positioned nodes #1102
+- Use `/.append` to fix a wrong usage of `/.add` in pgfmanual #1201
+
+### Changed
+
+- Cleanup `\newif`s
+- Remove unused scripts
+- Remove experiments/ folder
+- Simplify loading by delegating to top-level files
+- Promote `Missing character` to errors in building manual
+- Flatten the doc tree
+- Ensure `\tracinglostchars<3` in `\pgf@picture`
+- Use descriptive workflow job ids
+- Ensure `doc` v2 is loaded for pgfmanual
+- Ensure active `^^M` is non-expandable in `codeexample`
+
+### Contributors
+
+- 3geek14
+- BeneIII
+- graue70
+- Gábor Braun
+- Joel Coffman
+- Jonathan Spratte
+- Joseph Wright
+- Mario Frasca
+- Michael Kuron
+- Michal Hoftich
+- muzimuzhi
+- PhelypeOleinik
+- QJLc
+- Stefan Pinnow
+
+## [3.1.9a] - 2021-05-15 Henri Menke
+
+Emergency release to fix pgfplots which depends on unreleased parts of PGF.
+
+### Changed
+
+- Merge pull request #1012 from TorbjornT/incontrol_doc
+- Specify that relative coord is to end point
+- Merge pull request #1005 from kechtel/patch-1
+- Fix typo in guidelines on graphics
+- CI: Expire the cache
+- Merge pull request #1004 from michal-h21/patch-1
+- Update pgfsys-dvisvgm4ht.def
+- Merge pull request #1003 from tknuth/patch-1
+- fixed typo
+- Merge pull request #977 from muzimuzhi/pgf-point-node-border
+- adjust comments
+- \pgfpointshapeborder: measure by distance < 0.02pt
+- \pgfpointshapeborder: more doc words
+- doc: use paired \`\` and ''
+- \pgfpointshapeborder: doc new behavior
+- pgf/shapes: add warning when \pgfpointshapeborder gives up
+- pgf/shapes: improve \pgfpointshapeborder, #908
+- Merge pull request #1002 from muzimuzhi/edef-keys
+- pgfkeys: enhance edef keys, #305
+- fixup! build: copy the README into the TDS archive
+- build: copy the README into the TDS archive
+
+### Contributors
+
+- Christoph Kecht
+- Dr. Tobias Knuth
+- Michal Hoftich
+- muzimuzhi
+- Torbjørn T
+
+## [3.1.9] - 2021-03-02 Henri Menke
+
+### Fixed
+
+This release introduces a fix for blend mode with the dvips driver and
+improvements for handling expandable material that appears on a path.
+
+### Changed
+
+- Merge pull request #996 from muzimuzhi/dvips-blend-mode
+- dvips: fix displacement after blend group, #995
+- Revert "syntax is similar to METAPOST not METAFONT"
+- Merge pull request #994 from itmm/master
+- syntax is similar to METAPOST not METAFONT
+- Merge pull request #992 from joel-coffman/dev/fix-code-2-args-documentation
+- Correct documentation for .code 2 args second arg
+- Merge pull request #987 from muzimuzhi/doc-typo
+- doc: fix typo #986
+- Merge pull request #981 from muzimuzhi/fix-tikz@handle
+- Apply suggestions from code review
+- tikz: fix uses of \pgfutil@switch
+- Merge pull request #979 from muzimuzhi/doc-install-only
+- doc/fpu: fpu: mark /pgf/fpu/install only as not experimental
+- Fix and document dim() #964
+- Merge pull request #976 from muzimuzhi/tikz-math
+- tikz/math: gobble spaces between for list and loop body
+- Merge pull request #970 from muzimuzhi/reset-tikz@expandcount
+- tikz: retry to handle \relax on path #966
+- tikz/calendar: switch over \pgf@let@token in \tikz@lib@cal@handle
+- Merge pull request #973 from schtandard/spurious_show
+- Remove a spurious \show
+- Merge pull request #972 from alisaaalehi/patch-1
+- doc: fix typo
+- tikz: switch over \pgf@let@token in \tikz@handle
+- tikz: improve \tikz@expandcount handling
+- tikz: reset \tikz@expandcount more frequent #969
+
+### Contributors
+
+- Ali Salehi
+- Joel Coffman
+- muzimuzhi
+- schtandard
+- Timm Knape
+
+## [3.1.8b] - 2020-12-27 Henri Menke
+
+Hotfix for handling of TeX conditionals on a path. We can't forward \relax and
+frozen \relax through the parser because there is existing code that relies on
+this.
+
+The recommendation is to use expandable conditionals where possible.
+
+## [3.1.8a] - 2020-12-27 Henri Menke
+
+Hotfix for the new topaths handling. One instance did not yet properly
+preserve relative coordinates.
+
+## [3.1.8] - 2020-12-25 Henri Menke
+
+### BREAKING CHANGES
+
+If a topath is bent by any of the in=, out=, bend=, etc. options, a Bezier
+curve is constructed in the background. To infer the positions of the control
+points the start and end coordinate are converted to absolute coordinates.
+However, this has the effect that subsequent points on the path think that the
+endpoint of the topath was absolute which can lead to counter-intuitive path
+construction, e.g.
+```latex
+\draw (2,0) to[out=0,in=180] +(1,0) -- ++(0,-1) -- +(1,0);
+```
+If old code relies on this behavior, this drawing will silently break! Please
+open an issue if you rely on this.
+
+### Fixed
+
+This release introduces a fix for path handling which concerns expansion of
+tokens on the path in particular with respect to conditional. Previously when
+the expansion of a conditonal resulted in a frozen \relax the parser would just
+give up. Now the parser will skip over the frozen \relax and continue to
+expand tokens. Whether this will result in a meaningful expansion is up to the
+user.
+
+This release also includes other bug fixes. On GitHub you can click the commit
+hashes and the issue numbers to get to the fix and the ticket, respectively.
+
+- a4c275704 #952
+- 8a997bbc1 #954
+- 8f37bca84 #962
+- 3cbe5a192 #844
+- 49e5f0a08 #654
+- 17a95e4c5 #966
+- ad06895a6 #966
+- 79e613ae1 #966
+
+### Changed
+
+- CI: Use GitHub Actions from pgf-tikz/actions
+- Remove empty or outdated files
+- Preserve coordinate relativity across ..
+- Merge pull request #967 from muzimuzhi/handle-relax
+- fixup! doc: Add note on expandsion of path operations #966
+- Remove spurious spaces, terminate \advance in time
+- tikz: handle \relax and frozen \relax on path #966
+- doc: Add note on expandsion of path operations #966
+- Merge pull request #961 from muzimuzhi/improve-doc
+- doc: relation of /.code & /.initial will remain
+- Only force signed releases #962
+- doc: clarify /.code keys don't respect /.initial #654
+- Added doc for \pgfpointtransformed #844
+- Merge pull request #959 from muzimuzhi/improve-doc
+- doc: clarify path or full key start with slash #904
+- Merge pull request #956 from muzimuzhi/improve-doc
+- pgfmathdeclarerandomlist: improve doc and code comment
+- Merge pull request #955 from Ordoviz/master
+- pgfmathrandominteger: reordering of arguments incomplete #954
+- fpu: mark /pgf/fpu/install only as not experimental
+- Fix typos in manual
+- Merge branch 'PimpLuaExamples' of https://github.com/Mo-Gul/pgf
+- docs: set terminal table -> set table #952
+- correct codeexample preamble entries in Lua file
+- made some "normal" `codeexample`s compile again (when extracted)
+- just added end line commata at the end of values/styles
+- added hints which libraries need to be loaded as well to make the example in
+ `pgfmanual-en-tikz-graphs.tex` work closes issue #755)
+
+### Contributors
+
+- Lennard Hofmann
+- muzimuzhi
+- Stefan Pinnow
+
+## [3.1.7a] - 2020-12-01 Henri Menke
+
+### Fixed
+
+Another issue with the new LaTeX hook mechanism surfaced in the external
+library which is being worked around now.
+
+This release also includes other bug fixes. On GitHub you can click the commit
+hashes and the issue numbers to get to the fix and the ticket, respectively.
+
+- 3c46a6974 #947
+
+### Changed
+
+- Assisted release script
+- Attempt uploading to CTAN in CI
+- Attempt signing builds in CI
+- Protect possible parentheses in computing looseness #947
+- Superficial fix for hook ordering problem
+- Add pgf-parametric-example-cut.table
+
+## [3.1.7] - 2020-11-21 Henri Menke
+
+### Fixed
+
+Mostly spurious spaces have been fixed and some code has been adapted to work
+with the latest LaTeX release. In principle it should still be backwards
+compatible to older LaTeX releases but regressions cannot be excluded.
+
+Some other bug fixes:
+
+- 67295ec8 #946
+- 74b2cc30 #934
+- 8beaf970 #928
+- bf46600f #654
+- 1e8ee728 #930
+
+### Changed
+
+- CI: Create release from tag
+- pgffor: new expand list option
+- Fix spurious spaces #946
+- Merge pull request #943 from agrahn/offpagefading
+- hiding smask in the PS viewer
+- Merge pull request #940 from Ordoviz/patch-1
+- Merge pull request #941 from Skillmon/improve-parser-doc
+- macros are 'letters' for pgfparser as well
+- fix comment in example code
+- minor change to pgfparserletter
+- minor change to pgfparserdefunknown
+- minor change to pgfparserlet
+- more info for pgfparserdef
+- typos
+- more precise pgfparserreinsert description
+- [doc] Fix typo
+- Fix trailing else problem in pgfkeys
+- Merge branch 'pgfkeys-small-fixing' of https://github.com/muzimuzhi/pgf
+- Always place shadings in TLT in LuaTeX #934
+- DOC: typo fix in en-tikz-actions
+- pgfkeys: fix spurious spaces in "/errors" keys
+- pgfkeys: in "/.add code", ensure `/.@cmd` is long
+- Random shifts to fix output routine shenenigans #928
+- Revert "pgfkeys: make `.initial` compatible with `.code`, fix #654"
+- doc: various minor fix
+- doc: minor fix, #930
+
+### Contributors
+
+- Alexander Grahn
+- Andras Deak
+- Henri Menke
+- Jonathan Spratte
+- Lennard Hofmann
+- muzimuzhi
+
+## [3.1.6a] - 2020-10-01 Henri Menke
+
+Hotfix for `intersections` library. In the last version
+`\pgfintersectionoflines` was set to always return the intersection in the
+untransformed coordinate system #889. This however broke the interplay with
+other coordinate transformations and had to be reverted.
+
+### Changed
+
+- Revert "Invert transform before assigning intersection #889"
+- Omit missing library and fix spurious space
+- Fix spurious spaces in pgfmathparse with fpu #508 #915
+- Revert "Added sanity check for the catcode of '$' to avoid incompatibilities with onlyamsmath package"
+
+## [3.1.6] - 2020-09-28 Henri Menke
+
+### Acknowledgements
+
+This release stands in the name of the two contributors **Alexander Grahn** and
+**Yukai Chou** without whom this release would not have been nearly as great.
+Thank you very much!
+
+### BREAKING CHANGES
+
+- In the last version, in an attempt to fix updating `local bounding box` in a
+ clipping scope the `\pgf@path@size@hook` in `\pgf@protocolsizes` was set to be
+ executed unconditionally. Unfortunately, this broke all other uses of `local
+ bounding box` and has been reverted. If you need to use `local bounding box`
+ in a clipping scope, use the `overlay` option.
+
+- The recent Ghostscript version 9.53 has changed the primitives for
+ transparency, blend mode, and transparency groups. These are now supported by
+ PGF and should in principle go unnoticed by the user. (Thanks Alexander
+ Grahn!)
+
+- `\pgfintersectionoflines` will now always return the intersection in the
+ untransformed coordinate system. This however requires an additional
+ `\pgftransforminvert` which comes with a loss of precision and can potentially
+ lead to `Dimension too large` errors in edge cases.
+
+- PGF now supports the new hook management that will be introduced in LaTeX
+ 2020/10/01. While this should not lead to any noticeable changes, please look
+ out for breakages with overlays and the `current page` nodes. Please report
+ problems on the PGF or LaTeX issue trackers.
+
+### Added
+
+You can read about these new features in the manual:
+
+- PS-3 functional shading, opacity masks (fadings) and image masks for
+ dvips. (Thanks Alexander Grahn!)
+
+- The `dvisvgm4ht` driver developed by Michal Hoftich has been merged into
+ PGF/TikZ.
+
+- The `pgfparser` module has been slightly refactored such that it can be used
+ without loading all of PGF.
+
+- The order in which the inner styles are applied in a `\matrix` is now
+ configurable. #867
+
+- The file `pgfmanual-en-macros.tex` is developed specifically for typesetting
+ the PGF manual, however, many other package developers have found it useful
+ and made good use of it. To this end, we now install
+ `pgfmanual-en-macros.tex` into a directory that is searched by kpathsea such
+ that developers no longer have to copy the file into their own distribution.
+
+- The CI system was switched from Travis CI to GitHub Actions for better
+ integration with GitHub and direct deployment of build artefacts to the status
+ page.
+
+### Removed
+
+- The `bbox` library introduced in PGF 3.1.5 was removed. I further recommend
+ that if there are files containing `bbox` code left over from a previous
+ version that these are removed to avoid potential issues.
+
+### Fixed
+
+Lots of bug fixes. On GitHub you can click the commit hashes and the issue
+numbers to get to the fix and the ticket, respectively.
+
+- 44bb29fd #900 #923
+- 2ae12cb4 #924
+- f6039046 #918
+- 908db001 #889
+- 71becc18 #909
+- 83069dce #508 #915
+- c5a6dbbb #671
+- 0f52b63c #654
+- 17e588d5 #912
+- 197450c0 #755
+- eaf9c096 #888
+- d96c3f2f #843
+- 6a0e08db #640 #839
+- bd8c9c45 #876
+- 4773c311 #748
+- 2145bcfb #872
+- c44960e7 #872
+- 1ca59c70 #871
+- 65bcaaff #867
+- 68bebd7a #823
+- 1c380999 #808
+- 494bd677 #861
+- 1e520dc7 #863
+- 1efebdf7 #856
+- e1eac8af #859
+- ca1f30e1 #795
+- 6b79a6dc #855
+- a7cccca0 #848
+- 7098976d #855
+- 8095bc57 #846
+- 08041e44 #855
+- 730a3437 #853
+- ff3fe4c4 #852
+- 6e8397b5 #851
+- 6c88ed94 #851
+- e6e91c40 #848
+- 29de799f #845
+- 2a6eaefb #840
+- 357bc059 #837
+- 15c943b7 #831
+- 314a00ad #829
+- 03aa54d2 #816
+- 4e1529ba #822
+- 4ccfe0d4 #813
+- 1f21e3ba #819 #698
+
+### Changed
+
+- Activate CTAN zip action
+- Adapt shipout to new hook management #900 #923
+- improved functional shading (dvips); \pgfsys@definemask fixed
+- More missing args to \pgfmath@error
+- Add missing args to \pgfmath@error
+- Replace \pgfmath@PackageError by \pgfmath@error
+- Use \pgfmath@tonumber in pgfmath (fixes #924)
+- Merge branch 'master' of https://github.com/erihe251/pgf
+- fixed typo notes -> nodes
+- Merge branch 'pgfkeys-doc' of https://github.com/muzimuzhi/pgf into master
+- Remove unused `.expand two once` #918
+- [doc] pgfkeys: update examples of ".search also"
+- [doc] pgfkeys: document \pgfkeyssetevalue
+- [doc] pgfkeys: unify order of ".code" and ".style"
+- [doc] pgfkeys: typo
+- Invert transform before assigning intersection #889
+- pgfsys-xetex: sync with upstream, #909
+- Provide a convenient workaround for #508 (also #915)
+- pgfkeys: avoid \pgfkeysalso used in ".search also"
+- Fix CI badge; add PR template
+- Merge branch 'ps3shading-fading-imgmask-dvips-3' of https://github.com/agrahn/pgf
+- Merge branch 'fix-pgfkeys' of https://github.com/muzimuzhi/pgf
+- pgfkeys: make `.initial` compatible with `.code`, fix #654
+- pgfkeys: specially treat `.style n args={1}{...}`, fix #912
+- fixing code lines with assignments, as requested in the review
+- Merging upstream changes into ps3shading-fading-imgmask-dvips-3
+- Switch to GitHub Actions
+- optimizing sampling procedure (funct shadings, dvips)
+- merging recent upstream changes
+- addressing requested changes from review
+- doc: correct some typos
+- [doc] pgffor: replace \diameter with \r
+- [doc] fix typo, s/to/two/ in "between to point"
+- PS-3 functional shading for dvips
+- PS-3 shadings, opacity masks (fadings) and image masks for dvips
+- doc: remove reference to old "-to" arrow
+- Merge branch 'context-module-wrap' of https://github.com/LeonardKoenig/pgf
+- Update build instructions [ci skip]
+- context: Fix 'module wrapping error'
+- Merge branch 'minor-change' of https://github.com/muzimuzhi/pgf
+- Fix critical typo in documentation
+- [doc] enhanced consistency
+- [doc] fix wrong description for \pgfmathsubtract
+- fix typo in comment
+- Add library loading hints #755
+- Fixed typo: of -> off
+- Fixed typo, if -> of
+- gs-9.53 transparency; blend mode; transparency groups
+- Install pgfmanual-en-macros.tex
+- Revert "- removed some trailing spaces and replaced TABs with spaces"
+- Merge branch 'doc-fix-pdf-dest' of https://github.com/muzimuzhi/pgf
+- Fix pt/bp confusion in dvipdfmx driver #888
+- [doc] rename counter, "dummy" -> "pgfmanualentry"
+- [script] use value of "maxruns" in not-converge message
+- [doc] move two key labels inside "key" env
+- [doc] fix typo
+- [doc] fix wrong pdf dest
+- [doc] external lib
+- transform shape clashes with label position #843
+- Add options to Lua examples #640 #839
+- Resolve clash of object ids in SVG #876
+- Decorations are implicitly sloped #748
+- DOC:matrix:Use only default colorsin example
+- DOC:matrix: Adjust the column color in example
+- Fix merge conflicts
+- Remove bbox library
+- followed @joulev's suggestion
+- Update doc/generic/pgf/text-en/pgfmanual-en-library-fpu.tex
+- Update doc/generic/pgf/text-en/pgfmanual-en-library-decorations.tex
+- added `codeexample` plus some text to the `decorations` library manual as
+ suggested in pull request #872
+- removed braces as suggested in pull request #872
+- "improved" colors given in the `codeexample` of pull request #871
+- added reference from `matrix` library to "basic" matrix section
+- adapted formatting in `pgf/text-en/pgfmanual-en-tikz-matrices.tex`
+- changed order of mentioned libraries so they fit the order of references in
+ the next sentence in `pgf/text-en/pgfmanual-en-tikz-shapes.tex`
+- Little improvements for matrix/inner style
+- Convert quotes to TeX quotes
+- DOC:matrix: Add example for every row/col keys
+- Configurable matrix inner styles #867
+- Add key visualize as smooth cycle #823
+- /.style -> /.code #808
+- Documentation for /pgf/fpu/install only
+- New key `/pgf/fpu/install only` #861
+- Merge branch 'new-unit-px' of https://github.com/muzimuzhi/pgf
+- Remove \pgfkeys@ifcsname #863
+- pgfmathparser.code.tex: add pdfTeX/LuaTeX unit px
+- use fpu reciprocal is still under consideration
+- fixing typo in pgfmanual-en-tutorial-Euclid.tex
+- Update bbox library #856
+- Shift before rotate #859
+- Fix undefined control sequence in \pgfutil@pushedmacro
+- Revert "Execute size hook unconditionally #795"
+- Another improvement for #855
+- corrected typo in patch of issue #848
+- Improved fix for #855
+- If prefixed name does not exist, look up global name #846
+- Fix broken \foreach initializer #855
+- Check if set is defined #853
+- Forbid some more operations in patterns #852
+- Trim surrounding whitespace from pattern name #851
+- Use comma hack for pattern keys as well #851
+- Merge branch 'master' of https://github.com/Mo-Gul/pgf
+- incorporated tallmarmots suggestion of issue #848
+- Fix \pgfmathfloattoextentedprecision #845
+- (again) found double-space instances
+- minor issue additionally stated in issue #840
+- Fix chiral anomaly #837
+- dvisvgm4ht: ProvidesFileRCS and copyright
+- Merge remote-tracking branch 'dvisvgm4ht/master'
+- multiple is noun; multiply is verb
+- New pgfparser utility package
+- Fix typo in fadings driver for Lua/pdfTeX
+- Don't swallow the delimiter #831
+- Include dependencies in Makefile #829
+- pgfmathparser.code.tex: add pdfTeX/LuaTeX/pTeX units
+- Update manual issue template
+- Address the CTAN issues #816
+- Cherry-pick the useable stuff from #822
+- Issue template: Reminder to use latest manual
+- `arrows` library replaced by `arrows.meta`
+- Math parse looseness on to paths #813
+- Update README and fix .travis.yml
+- Error checking for postaction, correct xetex postaction
+- Mistake in code example
+- removed some more remaining instances of the `arrows` library (#819, #698)
+- Pass emptry group as a \Picture argument
+- Handle nesting
+- Added comments
+- Support display math inside picture
+- check for the vmode
+- Make the tex4ht patches active only at \begin{document}
+- test for existence of tex4ht commands
+- code cleanup
+- Removed \Rcs command
+- Initial commit
+
+### Contributors
+
+- Alexander Grahn
+- Arkonos
+- Erik
+- Hironobu Yamashita
+- Ilhan Polat
+- Kamil Ziemian
+- Leonard König
+- letzfets
+- Michal Hoftich
+- muzimuzhi
+- PhelypeOleinik
+- Stefan Pinnow
+- tallmarmot
+- thinbold
+
+## [3.1.5b] - 2020-01-08 Henri Menke
+
+Hotfix for the `external` library.
+
+The fix for #759 broke existing uses and has been reverted.
+
+## [3.1.5a] - 2019-12-21 Henri Menke
+
+Hotfix for `tikz-3dplot` compatibility
+
+The release includes a bugfix for #809
+
+## [3.1.5] - 2019-12-19 Henri Menke
+
+### BREAKING CHANGES
+
+- The computation of path times in the `intersection` library was wrong when
+ sorting intersections and did therefore not work correctly (#480). This is
+ fixed now, but that also means that the order of intersections might change if
+ you were using sorting before. You can easily check this by looking for
+ `\pgfintersectionsortbyfirstpath` and `\pgfintersectionsortbyfirstpath` or the
+ `sort by` key if you are using intersections in Ti*k*Z.
+
+- It turned out that in `\pgf@protocolsizes` the `\pgf@path@size@hook` was
+ executed only if the picture was actually to be placed. This led to the
+ problem that the `local bounding box` was not updated correctly (#795). To
+ correct this, the hook is now executed unconditionally.
+
+- To get name prefixes for `pic` working (#311) the resolution of node names in
+ `\tikz@calc@anchor` now has two stages. First it tries to look up the
+ prefixed name and uses it if it exists. If there is no prefixed name, the
+ global name without prefix will be looked up and used (fixes #717).
+ Previously, if the prefixed name did not exist and error was issued
+ immediately without attempting to look up the global name.
+
+- There was a bug in old PGF versions that the body of `\pgfkeysedef` was not
+ fully expanded #305. This was fixed in PGF 3.1 (ac33f7e5) by the use of
+ `\scantokens`. Unfortunately when expanding the body the catcodes at the
+ point of use are taken instead of the catcodes at the point of definition.
+ This led to new bugs like #669. With the new version we are taking a middle
+ ground. We support macro definitions within edef bodies by doubling all the
+ hashes followed by numbers. All other hashes have to be escaped manually. We
+ assume that this is not a common use case.
+
+### Added
+
+You can read about these new features in the manual:
+
+- The `patterns.meta` library now provides a couple of predefined patterns which
+ can be used as replacements for the ones provided by the `patterns` library.
+
+- Tight bounding boxes for Bezier curves using the `bbox` library. This feature
+ was contributed by @tallmarmot. Thanks!
+
+- New pgfkeys handler `.evaluated`
+
+- The RGB color model is now supported in Plain TeX, i.e. values can be integers
+ 0-255 instead of floats 0-1 for rgb.
+
+- Annotations for code examples in the manual as to which libraries are
+ required. These were contributed by Stefan Pinnow (@Mo-Gul). Thanks!
+
+- GitHub issue templates for more streamlined bug reporting.
+
+- New build system based on Lua. We'd like to have a more cross-platform build
+ system. The old system was based on Makefiles, which will be retained for a
+ while but gradually phased out. In the future we hope to be able to implement
+ a regression test suite.
+
+# Removed
+
+- In the last release the undocumented commands `\rawx`, `\rawy`, `\rawz`, and
+ `\coord` were added to the `\path let` operation. These proved to be not as
+ useful as anticipated (#731) and were therefore removed again.
+
+# Bug fixes
+
+Lots of bug fixes. On GitHub you can click the commit hashes and the issue
+numbers to get to the fix and the ticket, respectively.
+
+- 0b095288 #793
+- ba8628c8 #804
+- c6ef774c #305 #669
+- 135e361e #759
+- be8dfa7e #769
+- 26cea424 #805 #806
+- f63131b4 #801
+- 4204b35b #803
+- 167a78eb #798
+- 8445f362 #796
+- 03b89120 #795
+- acd2ca38 #480
+- d2caaf3a #387
+- a5989c1e #442
+- 9d4e1020 #428
+- 96f41c41 #730
+- b2bbefda #775 #776
+- d9e677f5 #400
+- 94be30ee #788
+- a632c4d0 #790
+- 41a85559 #789
+- 319cae01 #512
+- 969b1f8d #726
+- 888f902c #785
+- 226808c3 #784
+- 13dab67d #736
+- 92faccff #643 #773 #774
+- 3c909b77 #770
+- 6ccafffa #519 #751
+- 3cf72768 #627
+- 37c39d0e #602
+- a547358e #727
+- 97a18d33 #767
+- 2e11f549 #728
+- f7a24c56 #719
+- 88951be5 #311 #717
+- 08275e30 #747
+- fddaaad7 #753
+- a93c47eb #762
+- 88954e20 #768
+- 1302de8a #756
+- b2656567 #743
+- 47f87253 #742
+- 5e2f4a88 #284
+- aee5465f #735
+- 4aaa25e6 #736
+- 76a69d29 #640 #711 #729
+- 2d5fb0c3 #720
+- bb5614ea #718
+- 5c746e52 #715
+- ff369f8a #721
+- 7ee3a2ca #361
+
+### Changed
+
+- [CI] bigintcalc, etexcmds, gettitlestring, hycolor, intcalc, kvdefinekeys,
+ kvsetkeys, ltxcmds, refcount, uniquecounter
+- Reseed the RNG before every use
+- Remove redundant definition of `center` anchor
+- Rewrite explanation for `\anchorborder`
+- Document loading order for translator #804
+- Hash doubling in pgfkeys edef only for numbers #305 #669
+- Add conditional for externalize to manual
+- Check \ifmeasuring@ #759
+- Add comment about 8 character filename limit in old ConTeXt #769
+- [CI] atbegshi, atveryend, bitset, pdfescape, rerunfilecheck
+- Typos in the manual #805 #806
+- New build system
+- [CI] letltxmacro
+- Document that matrix on path need ampersand replacement #801
+- More nitpicking #803
+- Minor typo fixes and word change suggestions.
+- Missing letter in functional tokens #798
+- [CI] stringenc
+- Remove cleanuplink and friends #796
+- [CI] kvoptions
+- Execute size hook unconditionally #795
+- corrected some spellings - harmonized e.g. "$x$ direction" --> "$x$-direction"
+ with the rest of the manual
+- adjusted "mystars" example so it fits to the "blue code box"
+- renamed `lines` to `mylines` in last `codeexample` to match the previous
+ `mystars` example
+- Fix sorting of intersections #480
+- Update TeX Live CI
+- Document shorten < and > #387
+- pgfinterruptpath is not a scope #442
+- \pgfkeys@temp is not safe to transport over other macros #428
+- Draw to target instead of computed anchor #730
+- Implement and document new patterns #775 #776
+- \pgfmath@ensureregister produced missing characters #400
+- Wrong numerical constant in ln #788
+- AtBeginDocument for ConTeXt #790
+- Some packages got moved out of oberdiek
+- Protect parens and order of operations in turtle #789
+- Missing name prefix in "<dir> of=" positioning #512
+- Fix style key for datavisualization #726
+- New pgfkeys handler .evaluated
+- Forward scanned coordinate untouched #785
+- Nitpick #784
+- Fix spacing for keys in decorations manual
+- Correct typo in tutorial
+- Revert "Add \rawx, \rawy, \rawz to let operation"
+- Revert "Check for \pgfpointxyz before \rawx, \rawy, \rawz"
+- Revert "Making the declared coordinate accessible"
+- Improvements for markup in the manual
+- Support for RGB for Plain TeX (docs)
+- GitHub: Add mailing list link
+- GitHub: Issue templates
+- Add bbox library to manual (oops)
+- corrected spelling of `\todosp`
+- added some `\todosp` comments to `... Barb` arrows where no space between the
+ two words is shown in the manual (v3.1.4b)
+- replaced all instances of `arrows.spaced` with `arrows.meta`
+- replaced most of the instances of `arrows` with `arrows.meta`
+- fixed some more wrongly spelled library names (related to issue #736)
+- marked more libraries in horizontal bars, i.e. `|...|`
+- Change order of options in label and pin #643 #773 #774
+- Support for RGB for Plain TeX
+- Reset transformation in grow cyclic #770
+- First version of the bbox library
+- Correct example for every pic #519 #751
+- Support styling of outer \pgfmatrix node #627
+- Add some predefined patterns to patterns.meta
+- Improve the 'lines' example for patterns.meta #602
+- pgfmathfloat@parser@install in pgfmathfloatparse #727
+- Reverse anchor of spy node #767
+- Cannot use commas in pgfkeys #728
+- Add generated gnuplot files #719
+- Fix `name prefix` for pics
+- Add quotes to error message #747
+- Cheap trick to avoid leading space problem #753
+- Fix pgfkeys pretty printer for single key-value pair #762
+- Merge branch 'master' of https://github.com/lockywolf/pgf
+- Update doc/generic/pgf/text-en/pgfmanual-en-tutorial.tex
+- Install iftex in CI
+- /tikz/radius dropped units #768
+- Update pgfmanual-en-tutorial.tex
+- Fix of a typo
+- Support pattern objects with dvipdfmx
+- Race condition in circle radius #756
+- Merge pull request #757 from Lipen/patch-1
+- Fix typo 'arrow.meta' -> 'arrows.meta'
+- Reset some text parameters inside a node #743
+- principle -> principal
+- Fix misspelled library names
+- Definition should be deferred to \pgfutil@guessdriver
+- ConTeXt MKIV needs the LuaTeX driver #742
+- Merge remote-tracking branch 'Mo-Gul/master'
+- Reset \tikz@intersect@namedpaths at scope boundaries, fixes #284
+- Make \node foreach work if loop variable is used for positioning, fixes #735
+- Correct some typos, fixes #736
+- checked `patterns.meta` library stuff and fixed some minor issues
+- corrected a word in `pgfmanual-en-dv-axes.tex`
+- harmonized spelling of `i.e.` and `e.g.`
+- corrected line breaking in `pgfmanual-en-math-numberprinting.tex` where a
+ |...| was split across lines
+- Merge pull request #733 from hmenke/PimpCodeexamples
+- New .gitignore needs some special treatment
+- handled one more `codeexample` that was added after branching. (related issues #640, #711, #729)
+- moved `colorlet` to the `codeexample` itself instead of to `pre` in `pgfmanual-en-base-quick.tex`
+- included issue #720 ("sub-library" should load "main library" by default)
+- therefore added loading `graphs` library in `graphs.standard` library
+- adjusted `preamble` code in `codeexample`s accordingly
+- there exist `graphdrawing` `codeexample`s in the manual that don't need the
+ `graphs` library --> adjusted `codeexample`s accordingly
+- fixed issue #718 ([manual] \usepgflibrary vs. \usetikzlibrary)
+- missed to commit/push the Lua documentation stuff
+- had a look at the `codeexample`s where a leading space was introduced (see
+ https://github.com/pgf-tikz/pgf/pull/711#issuecomment-514506025). Some of them
+ could be removed but others are introduced because of code added to the `pre`
+ key where I don't have a clue if/how this can be avoided
+- continued(/finished) moving `setup code,hidden` to `preamble` of the `codeexample`s
+- minor stuff
+- corrected wrongly commented Lua comments in the Lua documentation files (of
+ commit 900d47729d91dd9ba3eb59de56d5d9a4ba2eb155
+- moved `setup code` before `pre` in `extract.lua`
+- started moving `setup code,hidden` to `preamble` of the `codeexample`s
+- also need to Lua comment LaTeX comment in the Lua documentation files
+- commented some more `\begin{codeexample}[setup code,hidden]` (as @hmenke
+ suggested in https://github.com/pgf-tikz/pgf/pull/711#discussion_r304140166)
+- implemented suggestions given in https://github.com/pgf-tikz/pgf/pull/711
+- removed commented/unnecessary stuff from `extract.lua`
+- minor stuff
+- accounted for some more `codeexample`s in
+ `tex/generic/graphdrawing/lua/pgf/gd`
+- adapted `extract.lua` after Henri changed it in Master to also account for the
+ manual files at `/tex/generic/pgf/graphdrawing/lua/pgf/`
+- accounted for some more `codeexample`s in `doc/generic/pgf/text-en/`
+- removed an unnecessary empty line
+- % TODOsp: ... --> % TODOsp: codeexamples: ... (so they can be found more easily)
+- continued adding code to make extracted `codeexample`s work
+- changed order of `setup code` and `preamble` in `extract.lua`
+- continued adding code to make extracted `codeexample`s work
+- continued adding code to make extracted `codeexample`s work
+- continued adding code to make extracted `codeexample`s work
+- finished switching from `libraries/tikz={...}` to
+ `preamble={\usetikzlibrary{...}}`
+- continued with following files in the manual
+- adapted `extract.lua`
+- incorporated fixes from main PGF repository (provided by Henri)
+- changed `\documentclass` from `article` to `standalone`
+- reordered some stuff
+- started switching from `libraries/tikz={...}` to
+ `preamble={\usetikzlibrary{...}}`
+- added `pre` stuff to codeexamples of the tutorial doc files so fewer files
+ fail TeXing using the build bash script.
+- finished adding libraries to codeexamples of the tutorial doc files (so far
+ not all needed styles and definitions were added using `pre` key)
+- commented line that adds all libraries to the extracted codeexamples in
+ `extract.lua`
+- started adding libraries to the codeexamples
+- fixes #715
+- .cvsignore -> .gitignore #721
+- Fix a leaking space.
+- Fix text color in nodes #361
+- Halt on error
+- On behalf of @marmot : Improving the calculation of bounding boxes for Bezier curves
+
+### Contributors
+
+- Benjamin Desef
+- doraTeX
+- fmitha
+- Jonathan Spratte
+- JouleV
+- Konstantin Chukharev
+- Lockywolf
+- Matteo Gamboz
+- Mo-Gul
+- quark67
+- samcarter
+- Sašo Živanović
+- Stefan Pinnow
+
+## [3.1.4b] - 2019-08-03 Henri Menke
+
+This is a bugfix release for the dvips driver. A regression was introduced in
+the dvips driver in the last release that led to displaced objects #722. This
+update fixes the regression but also reverts the fix for position tracking #690.
+
+## [3.1.4a] - 2019-07-16 Henri Menke
+
+This is a bugfix release to make the XeTeX driver less broken. A regression was
+introduced in the XeTeX driver in the last release that lead to displaced
+objects #708 #709. This update fixes the regression but also reverts the fix for
+position tracking #353.
+
+## [3.1.4] - 2019-07-12 Henri Menke
+
+### Added
+
+- Document and fix the `patterns.meta` library
+- Stretchable dash patterns
+- Use `\protected@edef` in `\pgfmathparse`
+
+### Fixed
+
+#672, #675, #689, #353, #693, #690, #700, #701, #702
+Revert 00f4e8d4154dcb3133ed4a106b6254b8faf874e2
+`\pgfmathrandominteger` didn't handle expressions as input
+
+### Changed
+
+- after_script runs after deploy
+- Add pgfmanual to release files
+- Add URL of the pdf manual to the README.md file
+- Goodbye SourceForge
+- Clear trap before deploy
+- Switch to a new branch for tlcontrib
+- Stretchable dash patterns #629
+- Try protected@edef in pgfmathparse
+- Hardening patterns.meta a little
+- \pgfmathrandominteger didn't handle expressions as input
+- extract.lua: all extracted files are tex
+- extract.lua: recurse into subdirectories, ignore remember picture
+- Describe \pgfdeclarepattern and \tikzdeclarepattern
+- Add patterns.meta to the manual
+- /pgf/foreach/count is unscoped #702
+- On the way to more configurable patterns
+- Add mailing list to the README
+- Missed stripping pt on dimensions #701
+- Bend angle need not be integer #700
+- No dedicated options for libraries (for now)
+- Add option to hide code
+- Stripping comments was too greedy
+- Small fix to the grammar
+- Typos in luamath
+- Functionality to print libraries in code listings
+- fixed some typos
+- fixed regression (accidentally duplicated part of code)
+- \pgf@nodecallback might be called twice #693
+- Default implementation of \pgfsys@hboxsynced doesn't work for dvips #690
+- Fix position tracking for XeTeX #353
+- Wrong order in definition of \translate #689
+- FILES is generated
+- Change priority of Travis jobs
+- Load imakeidx before hyperref
+- Remove user config from deploy script
+- Revert "Missing spaces in error messages #679"
+- Restored lost functionality in intersections / fillbetween feature
+- Revert 00f4e8d4154dcb3133ed4a106b6254b8faf874e2
+- Fixed regression: the merge cc191ed4ae5bd11df9ce42595102caa4e1f141b4 accidentally deleted a feature
+- Use imakeidx for automatic index creation
+- Looks like I got tex4ht working
+- Use T1 for DVI output for now, see also https://github.com/mgieseki/dvisvgm/issues/2
+- luaotfload was missing this whole time
+- Merge remote-tracking branch 'loopspace/master'
+- Disable T1 encoding for LuaTeX
+- Extended the higher-level save of the last moveto so that it also works with nodes.
+- Added dimensions for saving the last moveto coordinates so that -- cycle works
+ with nodes. The existing method uses the coordinates stored from the last
+ soft path move to, but this has an extra transformation applied to it meaning
+ that when it gets used in node placement the transformation is applied twice.
+- Missing spaces in error messages #679
+- Move tlcontrib to tlnet folder to make room for possible future MikTeX contrib
+- Typo in alternate angles #676
+- Missing xcolor definitions for Plain and ConTeXt #675
+- Typo
+- Some more fixes for the tex4ht manual
+- Merge remote-tracking branch 'Mo-Gul/master'
+- Revert all but the useful changes of 98829b450a96a6790570aba11949cd9834e49e2c
+- Some more cleanup before deploy
+- Fix .lastretry #672
+- Deploy TDS and CTAN zip
+- Get git tag in Makefile
+
+### Contributors
+
+- Andrew Stacey
+- cfeuersaenger
+- Christian Feuersaenger
+- Henri Menke
+- johannesborgstrom
+- Stefan Pinnow
+
+## [3.1.3] - 2019-05-09 Henri Menke
+
+### Changed
+
+- Further unbreaking of shadings #650
+- \ifdim instead of \ifx #412
+- Add push- and popmacro. Useful for smuggling. From ConTeXt
+- Merge pull request #664 from dcpurton/shadings-colorspace
+- Add navigation arrows to SVG manual
+- Typos in pgfmanual-en-library-circuits.tex #667
+- Simpler basename function for extract.lua #640
+- Add copyright and attribution for CMYK and grayscale shadings
+- Update documentation for color model independent shadings
+- CMYK and grayscale shadings library support
+- Functional shading color space conversion functions
+- Support for CMYK and grayscale shadings in set up code
+- Conversion from shade color to grayscale PostScript data support
+- Conversion from shade color to CMYK PostScript data support
+- Add grayscale shading postscript driver support
+- Add CMYK shading postscript driver support
+- Add grayscale shading parsing functions
+- Add CMYK shading parsing functions
+- Adapt shading drivers to allow for multiple color models
+- Produce compilable examples from extract.lua #640
+- Preliminary version of an extractor script for codeexamples #640
+- Manual typos #665
+- Revert "No mode switch for typesetting pictures"
+- Support shading color specifications in CMYK
+- Set up RGB specific shading parsing
+- Fix typos #662
+- No mode switch for typesetting pictures
+- Correct floored division (thanks @josephwright)
+- Merge pull request #661 from dcpurton/mandelbrot-fix
+- Fix Mandelbrot set shading definition #658
+- Add Easter to PGF calendar #593
+- Document save and use path #644
+- Missing definitions in tex4ht driver #660
+- Fix conflicting shading declarations for dvipdfm #659
+- Add some circuit symbols #641
+- Add tlpkg to Travis cache
+- Fix shadings in dvisvgm
+- % is not allowed in DVI #657
+- Fix shading regression #656
+- Don't switch mode in \pgfuseshading #655
+- Use TL usertree in CI
+- Merge pull request #647 from Skillmon/parserx
+- requested changes from review
+- Merge remote-tracking branch 'official/master' into parserx
+- More checks, fewer rsyncs
+- fixed bug ignoring +
+- fixes #628; needs the new parser version
+- fixed a bug in pgfparserlet
+- removed parserx from FILES
+- parserx replaces parser
+- Force push to SourceForge
+- Add revision file to archive
+- Override before_script for SourceForge mirror
+- Update README [ci skip]
+- Typo
+- Missing packages
+- Better commit message
+- Deploy tlcontrib
+- PGF requires etex
+- Looks like we have to rerun twice
+- Rerun check for dvisvgm docs
+- Deployment script for website
+- bugfix default space rule
+- added pgfparserxlet
+- Merge branch 'fix-typos' of ssh://git.code.sf.net/u/frougon/pgf
+- Shading assignment has to global #650
+- Correct initial value for minimum width and height #649
+- use pgfutil@namedef
+- no etex, no folds
+- Merge remote-tracking branch 'official/master' into parserx
+- Merge remote-tracking branch 'kpym/master'
+- Optional e-TeX protection
+- finished parserx documentation and module
+- Fix Travis conditional
+- Only sync when on upstream
+- \noexpand instead of \ignorespaces
+- Automatically mirror changes to SourceForge
+- Allow optional comma in let assignment list #606 (oberdiek)
+
+### Contributors
+
+- David Purton
+- Jonathan Spratte
+
+## [3.1.2] - 2019-04-04 Christian Feuersaenger
+
+### Changed
+
+- Update README
+- Fix #523 (jkinable)
+- Fix #522 (kpymtzanev)
+- Welcome to GitHub :octocat:
+- Renaming perspective library macros
+- Fixed typo and missing backslash
+- Correct copyright statement
+- Added perspective library
+- Fix TeX conditionals on \pgfmathdeclarefunction (Eric Domenjoud) Feature Request #121
+- More accurate \pgfpointnormalised #518 #519 Feature #96
+- tikzmath needs to know about fpu
+- Fix shading angle #516 (Eric Domenjoud)
+- Fix trivial typo #514
+- Missed ligature suppression for dvisvgm #473
+- Now I hopefully got all of the ligatures #473
+- Some fixes for the shading patch #511 (Eric Domenjoud)
+- \long\def
+- Fake \scantokens has to at least strip braces
+- Only use \scantokens if available #508
+- Revert "Revert "Patch for shadings #511 (Eric Domenjoud)""
+- Revert "Patch for shadings #511 (Eric Domenjoud)"
+- Making the declared coordinate accessible
+- Globally remember declare coordinate of a node
+- Check for \pgfpointxyz before \rawx, \rawy, \rawz
+- Add \rawx, \rawy, \rawz to let operation
+- Disable strict nesting for now
+- Patch for shadings #511 (Eric Domenjoud)
+- minor stuff
+- Merge branch 'master' of ssh://git.code.sf.net/p/pgf/git
+- Merge branch 'branch_3.1_hotfix'
+- updated release file
+
+### Contributors
+
+- Henri Menke
+- Max Snippe
+- Stefan Pinnow
+
+## [3.1.1] - 2019-02-02 Christian Feuersaenger
+
+### Changed
+
+- fixed bug #503: regression prevented the use of dvips. This reverts the bugfix
+ for bug #362
+
+## [3.1] - 2019-01-05 Christian Feuersaenger
+
+### Changed
+
+- \pgfmathprintnumber: implemented 'retain unit mantissa=true|false' (feature #92)
+- fixed wrong projection of `canvas is xy plane at z` in `3d` library (bug #410)
+- added documentation of `3d` library to the manual (support request #11)
+- defined CMYK colors for ConTeXt (feature request #33)
+- `text along path` decoration repeated last char multiple times when
+ this was in math mode (bug #479)
+- fixed accidental usage of `\rm` (bug #476)
+- fixed newlines for tex4ht (bug #327)
+- fixed bug that `fit` didn't work with `transform shape` (bug #330)
+- fill color in nodes now respects colormodel (bug #349)
+- fixed broken VTeX support (bug #350)
+- `text=<color>` now works fine when in the nodes' text `\textcolor` is used (bug #362)
+- allowed whitespace between layers in `\pgfsetlayers` (bug #376)
+- fixed `\method` which can now contain empty lines (bug #448)
+- manual improvement regarding `pgfoothis` (bug #452)
+- documented commands `\pgfooeset`, `\pgfooappend`, `\pgfooprefix` (bug #452)
+- fixed bug in \pgfkeysedef (bug #306)
+- `miter limit` now raises an error when a value < 1 is given (bug #347)
+- fixed bug that `\pgfmathmax` and `pgfmathmin` were broken when
+ `fixedpointarithmetic` library was loaded (bug #360)
+- added missing function `\pgfmathpneg` in `fixedpointarithmetic` library (bug #361)
+- fixed bug that brace decorations were malformed for large amplitudes (bug #351)
+- made node parser aware of prefix and suffix (bug #397)
+- (almost) fixed guillemets for LuaTeX (bug #473)
+- fixed incorrect spelling in pgflibrarydecorations.text (bug #479)
+ (but this doesn't solve the bug 100%)
+- fixed 'bend left' bug if used with a formula (bug #423)
+- use \typeout stream instead of \write16 (bug #488)
+- fixed some bugs regarding graphdrawing electrical "springs" (bugs #380 and #381)
+- fixed pgf_lookup_and_require for new luaotfload (bug #493)
+- fixed graphdrawing for ConTeXt (bug #477)
+- added utility \pgfmathifexpression (and special treatment in luamath
+ library and fpu library)
+- intersections lib: improved accuracy of intersections for linear paths
+- fixed incompatibility issue of tikzmath and fpu reported in
+ http://tex.stackexchange.com/questions/349766/pgfplots-on-tikzmath-function-with-conditionals-returns-an-error
+- Improved driver detection (bug #395 TikZ does not create output with LuaTeX 0.95.0)
+- New luatex driver now supports fallback to pdftex driver if
+ luatexversion is older than 95 (let's hope this works reliably - luatex
+ used to have version 240 some time ago!)
+- Fixed bugs that caused pgfsys-dvips.def to generate corrupt
+ PostScript for all nodes.
+- Bounding box computations for animations implemented.
+- Animated arrow tips are now possible.
+- fixed incompatibility between textpos (absolute mode) and external
+- fixed \write18 issues in luatex 0.87 and later (by using os.execute())
+ affects external lib and plot function.
+- Lots of bugfixes in animation and svg code.
+- Added optimizations to reduce file size for svg code
+ (better support by dvisvgm will be needed however for more
+ compact text!).
+- First working, fully documented version of TikZ animations!
+- Fixed manual stuff to compile it with dvisvgm.
+- Rewrote tikz animation lib.
+- added context-related aux file fix of Hans Hagen
+- fixed save stack issues (eliminated 'retaining' issues) about pgf@x and pgf@y
+- external lib: 'force remake' now also updates .md5 files
+- fpu: fixed floor and ceil
+- fixed basic layer floor function
+- lua library: improved interoperability of luamath and fpu
+- unit test now compares luamath, fpu, and pgfbasic math
+- activated math parser in foreach's end notation to allow \foreach \i in {0,...,10-9}
+- Worked on pgfsys-dvisvgm.def a lot. Now requires
+ dvisvgm-1.5.3 because of switch from pt to bp there. Does
+ correct bounding box computations.
+- fixed bug in luamath library
+- external lib: added support to automatically externalize references and
+ labels with 'mode=convert with system call'
+- Reworked implementation of animations for tikz and started
+ on documentation of the backend.
+- First complete implementation of animations for tikz! (for
+ svg backend). Documentation still missing, but works nicely.
+- First work on animations for svg. Added commands in pgfsys
+ and added module pgfmoduleanimations. No documnetation yet.
+
+### Contributors
+
+- Henri Menke
+- Till Tantau
+
+## [3.0.1] - 2015-08-07 Christian Feuersaenger
+
+- fixed regression introduced for pgf 3.0.0 (bug #149): leading empty
+ lines at the beginning of plot files disabled '-- plot'
+- fixed bug #291 (missing white space trimming in node labels)
+- fixed bug #313 (alias option did not respect name prefix/suffix)
+- fixed bug #341 ("is in pic" was not reset)
+- fixed bug #365 (caused by missing adoption after copy-paste in tikzlibraryfolding)
+- fixed bug #315/316 by applying the suggested patch and verifying it
+- fixed fpu math functions for int, ceil, and floor
+- added \pgfmathlogtwo and \pgfmathlogten as requested in bug #359
+- Fixed problem in gd: Creating more than about 15 vertices
+ inside a graph drawing algorithm was impossible since this
+ created too many text input levels. Reorganized the interplay
+ between tex and lua for the coroutine so that no input levels
+ are created.
+- Added number nodes option to graph lib.
+- Fixed nullfont warnings in axes in datavisualization.
+- Fixed wrong axes for school book plots.
+- Fixed nullfont warnings when parsing logic gate inputs.
+- Fixed bug in tikz.code.tex concerning colors for arrow tips:
+ Setting and restoring the global color "trackers"
+ pgf@fillcolor@global over groups was done only in \pgfscope,
+ but not in the scopes opened and closed by tikz when drawing a
+ path (\pgfsys@beginscope is used there). This caused wrong
+ colors to be used.
+- Updated patterns.meta library.
+- context: committed patch to adopt pgfutil-context for new (incompatible)
+ context handling of colors -- contains some cleanup by Hans Hagen.
+- fixed bug in external lib: braces in external filenames confused the generator
+- fixed bug in fpu: equal(x, 0) failed for x<0
+- fixed bug in atan2 (returned wrong sign for atan2(4e-5,-5))
+- implemented atan2 in FPU
+- fixed save stack issue (TeX capacity exceeded, sorry [save size=250000])
+ if the color changes a _huge_ number of times during a single path.
+- worked on LUA math parser: ensured that a suitable first scope of
+ functions works. I also added support for 'declare function'
+- Added provisional code for patterns.meta library. Patterns
+ can now be declared using TikZ code with additional support
+ for tile transformations. Currently only PDF output supported
+ at back-end (uses \pgfsys@declarepattern@meta in pgfsys-pdftex.def).
+- finished first prototype of a LUA math parser. It is orders of magnitude
+ faster than its TeX pendant, features a pure LUA mode and also offers a
+ fallback to the TeX \pgfmathparse for unsupported operations/functions
+ only defined in TeX.
+- fixed bug (regression of bug #229): external lib with dvips produced
+ wrong bounding box (was broken entirely)
+- fixed regression in external lib: 'mode=graphics if exists' broke any
+ undefined label warnigns
+- added automatic "fast lane" to math parser: if the input is a number
+ without units, it will return that as-is. Reduces typesetting time down to
+ 66% for huge scatter plots and has just 1% overhead for math intensive
+ figures.
+- added switch 'trig format=deg|rad' which allows to switch sin,cos,tan,
+ and their friends to radians. It works for all user input
+ arguments - I hope without unanticipated side-effects (marked as
+ experimental)
+- external lib: defined suitable defaults for 'system call' depending on driver
+- external lib: solved incompatibility with biblatex's \cite[][]{name}
+ command (http://tex.stackexchange.com/questions/173465/tikz-error-for-externalized-graphics-but-output-is-correct}
+- number parser/printer: added switch 'read comma as period' to read
+ localized input numbers. Off by default but added useful hint to parser
+ message.
+- Fixed bug #308 fixedpointarithmetic: unwanted spaces by line ends
+- Fixed feature #81: signum function (fpu + pgf basic layer)
+- Fixed all \begin{scope} and \end{scope} in foldings lib,
+ changed them to \scope and \endscope.
+- Fixed #303 Type in pgfmanual (colormixin)
+- Fixed #302 pgf-3.0: Cannot plot a constant function. Will
+ now center the constant line.
+- Addressed #299 Precision problem with explicitily anchored
+ labels: While not a bug, I added a "centered" option for cases
+ similar to this one (although, in this particular case, the
+ new centered option is not what is needed)...
+- Fixed #298 \pgfarrowsdeclare is still mentioned in pgfmanual
+- Fixed #294 Nodes for arcs, which angles are calculated
+ simultaneously.
+- Fixed #292 "node scale and outer sep" by introducing the new
+ option "outer sep=auto", which takes care of both this problem
+ (at least in all normal cases) and also of the draw versus
+ fill problem with outer seps.
+- Fixed #285 \tikz@intersect@namedpaths persists outside
+ scopes as suggested.
+- Fixed #284 Additional rerun statement for overlays (for LyX)
+ by adding the proposed solution (essentially).
+- Added post-fix for #288 by undoing all -- ligatures in
+ verbatim code.
+- Fxied #283 "Is there a smarter way to handle units in math
+ engine?" by adding the "scalar" function.
+- Fixed #288 "All the '£' should be '$' in the examples of
+ pgfmanual..." by switching to T1 enconding.
+- Fixed #282 "\pgfmathredeclarefunction does not work properly."
+- Added first edge routing algorithm to gd.
+- intersections libs: improved robustness and accuracy for curveto paths
+ by using the floating point library together with Mark Wibrow.
+- fixed bug in latex/plain tex shipout routines for xdvipdfmx and xelatex:
+ combination of shadings and standalone package failed to work.
+- Fix for 'rotate around x/y/z' keys which now evaluate
+ the argument provided.
+- intersections lib: detected duplicates in line-to intersections
+ in endpoints and suppressed them.
+- intersections lib: stored time offset for each intersections as optional
+ property (i.e. if it comes for free). This is required to compute fill
+ paths
+
+### Contributors
+
+- Christian Feuersaenger
+- Mark Wibrow
+- Till Tantau
+
+## [3.0.0] - 2013-12-20 Till Tantau
+
+- In preparation for the release 3.0.0, I pimped the manual a
+ bit. It will now automatically detect whether graph drawing
+ C libs are available or not. Also, syntax hilighting is now
+ always switched on. I also some subtle optical hints to
+ crossreferenced words in the code examples; this is pretty
+ useful, I think.
+- Did a lot of cleaning up for the release.
+- Fixed a bug in Vertex.lua that returned wrong anchor
+ positions for non-centered vertices.
+- Fixed bug #280 "Layered layout" produces unknown key with graphs library.
+- Fixed bug #279 "Some parts of arguments in foreach macro are lost".
+- Fixed bug #258 "Default arrow edge style puts circumflex in
+ drawn end node" by now allowing people to say tip=on proper draw.
+- intersections lib: ensured that 'name path global' is reset between main paths.
+- worked on intersections lib (internals only); added O(N) list
+ append/prepend utilities
+- Added keys 'rotate around x', 'rotate around y' and
+ 'rotate around z' to rotate the xyz coordinate system
+ around the x, y, or z axis.
+- Fixes for 'text effects along path' decoration and docs.
+- external lib: added support for 'up to date check=md5' for lualatex.
+ Now, lualatex and pdftex both result in the same checksums (by means of
+ \usepackage{pdftexcmds})
+- Finalised 'text effects along path' decoration and docs.
+- Changed keyval example (and references to define@key)
+ in pgfcalendar documentation to pgfkeys stuff.
+- Minor fixes to decorations.text and math libraries documentation
+- Added 'text effects along path' decoration.
+- Fixed regression/bug in 'name path global'.
+- Applied path for bug #277 "\beforeforegroundpath not working".
+- Prepared manual for new release (fixed overful boxes and
+ index problems).
+- Updated math library (minor fixes).
+- Applied some fixes so that C code for graph drawing works
+ once more.
+- Arrow tips and their doc are now officially finished!
+- Added documentation of nonlinear transformations.
+- modified release script to allow uploads of unstable TDS
+ zips to http://pgf.sourceforge.net using
+ make -f pgf/scripts/pgf/Makefile.pgf_release upload USER=cfeuersaenger
+- Fixed problem with math parser inserting extraneous
+ spaces when parsing \dimenexpr
+- Changed blend mode syntax to standard pgf syntax (since PDF
+ and SVG do not agree on names...).
+- Added scale and slant options for arrow tips.
+- Added more generic arrow tips.
+- First version of comlete arrow documentation finished. Still
+ need to document the arrows.meta library, though.
+- Added "tips" option for drawing arrow tips without drawing
+ paths.
+- Fixed bug #273 "Graph drawing sublayouts fails".
+- Incorporated first partial documentation of the arrow tips
+ into the main documentation.
+- Fixed bug bugs:#272 "SVG parser error after close path" as
+ suggested by Mark Wibrow.
+- Also changed the default syntax for svg path command so that
+ it uses braces instead of quotation marks. (Quotation marks
+ still work, of course.)
+- Started working on arrow doc.
+- Added macro to convert string of digits to comma separated list.
+- First version of new arrow tip management done. Up and
+ running! Still needs documentation and the old arrow tip
+ codes should (but need not) be ported.
+- Did some porting of old code, added fixes. Doc still missing.
+- Fixed bug #264: "\pgfkeys /errors/unknown key should (?) expand first argument"
+- Fixed bug #268: "`matrix of nodes` isn't working properly any more"
+- Corrected typos (bug #266 and bug #265)
+- added magnetic tape shape.
+- Fixed bug #262/267: "Line breaks are not working in labels anyy more."
+- Fixed bug #260: "TikZ node on background in pgfextra"
+- Started work on bending arrows.
+- external lib: fixed bug: file dependency handling was incorrect and
+ suffered from regression caused by MD5 checks
+- repaired incompatibility with pgfplots <= 1.8: samples key was
+ evaluated in context of floating point unit and new pgf code relied on dimension
+ registers.
+- Added "turn" key.
+- Added "angle" pic type and "angles" library.
+- Patched gd loader code so that it works with context mark IV.
+- Added new pic path command.
+- Patched pgfsys-dvipdfmx.def to step around the bug in
+ (x)dvipdfmx that caused scaled boxes (including scaled
+ graphics) inside nodes to be displayed incorrectly.
+- fixed bug in fpu: 0^0 and 0^x both produced nan. Now we get
+ 0^0=1 and 0^x = 0.
+- Removed claims from manual (not by me...) that TikZ does not
+ work with Mark IV of context. I just tried it and everything
+ I tried (including advanced stuff like shadings) worked fine.
+- Fixed pgf intersection library to ensure that
+ specialround tokens are processed.
+- Added support for dvisvgm. Quite nice...
+- Worked on tex4ht code. Works reasonably well know and even
+ graph drawing is possible (when luatex is used for
+ typesetting; for this I needed to fix some latin1 characters in
+ html4.4ht). Also, I renamed /tikz/tex4ht... to /pgf/tex4ht
+ (someone else added that) since tikz has nothing to do with
+ that stuff.
+ Typesetting the manual in tex4ht no longer works, but that seems
+ like too much bother for my taste.
+- Fixed bug #256 "The special \pgfcoordinate macro doesn't
+ expand \pgfpictureid."
+- external lib: fixed incompatibility of pdflscape with
+ external lib
+- Fixed a problem with pdf resources of transparency groups in
+ dvipdfmx.
+- Fixed bug #149 "/tikz/raw gnuplot ignoring segmented plot"
+ by introducing a new way of handling plot streams. There are
+ now new kinds of points (outliers and undefined points) and
+ "new data sets" commands inside streams. Handlers (like the
+ lineto and curve handlers) can be configured to interpret
+ these as jumps (this is the default).
+- Fixed bug #255 "Trig computations offend fp via fixedpointarithmetic lib"
+- Added "math" library. Could be integrated with calc library.
+- Fixed bug in external lib: mode=list and make did not cope well with
+ \ref in externalized images. These will be remade now.
+- Fixed bug #162 "PGF manual examples use undefined "shape example" style"
+- Fixed bug #169 "ghostscript error: /undefined in pgfo"
+- Concerning bug #167 "node pin option sets
+ inconsistent/incorrect angle" I added some clarification in
+ the manual that explains the observed behaviour.
+- Fixed bug #158 "\pgfmathparse does not support e-TeXs
+ \numexpr and \dimexpr". You can now also use
+ \pgfmathsetlength to assign a muskip a value. Internally,
+ "mu" is treated like "pt", but if an expression contains
+ "mu", \pgfmathsetlength and \pgfmathaddtolength will convert
+ the number to "mu" before the assignment.
+- Fixed bug #173 "Tikz's transparency, xelatex and preview
+ package" by adding a specific fix for the interaction
+ between preview.sty and everyshi.sty in pgfutil-latex.def.
+- optimized mark=* and mark=o (q path versions lead to 10% time reduction)
+- adopted new pgfkeys feature to /handler config/full or existing (
+ required when /.search also is used to find the correct key path)
+- Fixed bug #175 "In PGF oo module, calling a method strips grouping"
+- Fixed bug #181 "Need to document |- coordinates using calc notation"
+- Fixed bug #187 "\pgfmathanglebetweenpoints is not documented"
+- Increased accuracy of atan, atan2 and
+ \pgfmathanglebetweenpoints.
+- Fixed bug "#168 PGF is sensitive to dollar catcode"
+- Fixed bug "#186 pgfonlayer makes pgf forget options" and
+ added "every on background layer" option.
+- Fixed bug "#192 pgffor scope iteration is buggy"
+- Fixed bug "#196 Incoherent syntax for Bézier curves"
+- Fixed bug "#199 Drawing error for chamfered rectangle"
+- Fixed bug "#201 Markings fail with "Dimension too Large" on
+ certain paths" by fixing a mistake and the decoration core
+ and, additionally, in pgfmathanglebetweenpoints.
+- Fixed bug "#254 building currenct CVS version fails on
+ graphdrawing with current luatex": Will now work nicely with
+ TeXLive 2013 and Lua 5.2.
+- Added feature request "bug #203 Blending modes and better transparency"
+- Fixed bug #204 "strange influence of \baselinestretch on
+ tikz figure" by no longer sharing \pgfutil@tempa with latex:
+ This register gets changed by LaTeX in a fontchange, which, in
+ turn can happen at the beginning of every
+ \pgfmathsetlength.
+- Fixed bug #207 "Decoration markings not on path on large
+ lines" by using a more precise computation of positions on
+ straight lines in decorations. Also, the angle computation
+ is now much more precise by fixedin bug #201.
+- Fixed bug #212 "Error if using plot into a \foreach loop in
+ a single path" by making \pgffor@beginhook and friends local
+ to the current \foreach. A nice side-effect is that one can
+ now nest \foreach statements on a path and also mix in the
+ plots. Hopefully, no one relied on the (undocumented,
+ unsupported) old bevahiour of the hooks.
+- Fixed bug #213 "pgfmathsetcounter only works in local scope"
+ by adding a note in the documentation.
+- Fixed bug #211 "\nodepart ignores text transparency"
+- Fixed bug #220 "Transformations ignored in edge decoration."
+- Fixed bug #221 "xyz spherical and cylindrical coordinate, radius not defined"
+- Fixed bug #225 "pgfkeys "/errors/unknown choice value" ignores parameters"
+- Fixed bug #253 "\pgfkeysfiltered cannot accept long arguments"
+- Fixed bug #252 "I'm not able to build the current CVS
+ version". This included a number of patches to fix problems
+ introduced with the bugfixes introduced recently
+- Fixed bug #226 "matrix column sep=-\pgflinewidth changes after empty cell"
+- Fixed bug #229 "pgfpagesuselayout breaks beamer class"
+ (hopefully, setting page sizes is really messy in TeX!).
+- Fixed bug #232 "pow function broken for 0^x for non-integer values of x"
+- Fixed bug #165 "\draw with empty domain results in infinite calculation"
+- Added better error message to adress bug #244 "mindmap-style
+ "invalidates" coordinate shape."
+- Fixed bug #235 "\def\costhirty{0.8660256} not really used"
+- Fixed bug "#237 CVS-version: pdfimage error: key interpolate undefined"
+- Fixed bug "#245 broken key /pgf/decoration/reset marks"
+- Fixed bug "#239 picture disappear after a zero-width rectangle width shading"
+- Fixed bug "#247 Error messages hard to catch in plain TeX/ConTeXt"
+- Fixed bug "#166 Possibly typos in circuits.logic.IEC"
+- Fixed bug "#249 pgfkeys: /handlers/first char syntax is not
+ 'self-contained' (CVS version)"
+- Fixed bug "#248 circuits adjustable annotation improperly placed"
+- Fixed bug "#250 pgfkyes: .append style and similar undouble # tokens"
+- Fixed bug "#143 label changes center of a matrix node"
+- Fixed bug #128 "fit does not scale if used in scaled scope"
+- Fixed bug #136 "\hrulefill inherits or not pgf line styles"
+- Fixed bug #224 "Including Tikzpicture in third part of
+ multipart node"
+- Fixed bug #251 "cross out shape interacts with path options of path it is drawn on"
+- Fixed bug #139 "Placement of node inside matix environment"
+- Fixed bug #131 "text centering calculates wrong" and added
+ new "node font" option.
+- Fixed bug #121 "Annoying "Underfull \hbox (badness 10000)" message"
+- Fixed bug #134 "Edge node style affecting arrowhead".
+- Fixed bug #132 "Error in matrix with column sep "between"
+ origins"
+- Fixed bug #133 "\draw[-<<,>=stealth] (10,45) -- (40,45); does
+ not work." However, this introduces a (small, only visual)
+ incompatibility with previous versions. If you need the visual
+ effect "-<<" used to have (which, in a sense, was wrong), use
+ "-< <" instead. The new "-> >" is also quite handy.
+- Fixed bug #116 "Decorations can't be repositioned when
+ pre/post used."
+- Fixed bug #241 "div/null error by (270:length) and a fading line."
+- Fixed bug #126 "Incorrect placed labels for inplicite positioned nodes."
+- Added foreach syntax to nodes. This is useful and also
+ needed to fix the problem that the foreach statement cannot
+ be used after a to path.
+- Fixed bug #18 and #74 (active characters and tikz) by virtue
+ of the new "babel" library, which deactivates catcodes at the
+ beginning of tikz pictures and reactivates them in nodes.
+- Fixed bug #110 "cannot add node after cycle operation"
+- Fixed bug #88 "\pgftransformarrow does not rotate with \pgfpointanchor"
+- Fixed bug #86 "macro-expanded tree node has bad edge anchor"
+- Fixed bug #85 "PGF + Crop package, at least for pdftex."
+- Fixed bug #83 "Transparency Problem with \usepackage{endfloat}."
+- Applied patch #19 pgfkeys: ".search also" fails at unbalanced "\if" values
+- Applied patch #18 Missing grid lines with
+ negative increment
+- Applied patch #17 TikZ folding library
+- Applied patch #14 inheritance in the oo module
+- Applied patch #13 leaking space in \pgfpointintersectionoflines
+- Applied patch #11 Patch for Bug #3165961 (\pgfmathmax and \pgfmathmin)
+- Fixed problem of patch #9 Add papersize to XeTeX driver
+- Applied patch #8 Support for changing physical page size with XeTeX
+ (also added position saving support, while I was at it...)
+- Applied patches #3, #4, #5, #6 (typos in manual) as far as possible
+- Fixed bug #236 "Scaled closed paths, start/end points dont exactly match":
+ "cycle" can now be used with all path operations where it
+ makes sense, not only with --. In particular, things like
+ ".. cycle" or "to [bend right] cycle" are now allowed.
+- Reworked handling of edge and vertex paths in gd. In
+ particular, edge--vertex intersections are now computed in
+ Lua, rather than in TikZ. This is much more powerful and
+ allows beautiful arcs between vertices. It is also very
+ useful for planar graph drawings when several edges leave a
+ vertex in the same direction.
+- Did away with luadoc, now using simple handcoded documentor
+ that will also work with Lua 5.2
+- Redid OGDF support. Resonably stable base now.
+- Added better C support.
+- Should now work with both Lua 5.1 and 5.2
+- fixed incompatibility of fixltx2e and external lib
+- Reworked Storage mechanism of graph drawing system.
+- Added phylogenetics library for graph drawing; documentation
+ still only rudimentary.
+- Started adding support for calling C graph drawing functions
+ from Lua.
+- First proof of concept for OGDF finished.
+- Must still address luatex shared library link problems.
+- fixed bug in external lib: \tikzexternalgetnextfilename did reset the
+ value of \tikzsetnextfilename and 'export next'
+- updated driver pgfsys-xetex: now, it supports all that the new driver
+ for dvipdfmx does which includes fadings, functional shadings, and
+ patterns.
+- First complete documentation of the graph drawing
+ system. (Finally!)
+- Renamed gd files to shorter versions: instead of
+ pgf/gd/model/pgf.gd.model.Edges.lua we now have
+ pgf/gd/model/Edge.lua and so on.
+- Worked on gd documentation. Only binding doc is still a
+ mess.
+- Worked on gd documentation.
+- New version of gd lib. The internals have been completely
+ redone. In particular, no tikz libraries are needed for the
+ individual algorithms any longer, all declarations are now
+ done completely inside Lua. This makes gd usable (in
+ principle) independently of tikz and pgf.
+- Because of this, all declarations of algorithms need to be
+ redone.
+- external lib: fixed spurious white space (caused by 'up to date check')
+- manual styles: improved robustness of auto cross references & active spaces
+- Fixed a bug with active colon in circuits lib. Probably more to
+ fix in other libraries.
+- Improved precision of math functions asin and acos (using linear
+ interpolation instead of constant interpolation)
+- Worked on gd.
+- fixed pgfsys-pdftex.def : very old regression with \setbeamercovered{transparent} and \pause
+ Patch by Hendrik Vogt
+- Added support for sublayouts in gd (not yet fully
+ documented). This allows one to use several algorithms inside
+ a single graph.
+- Redone handling of clusters in gd yet again. Renamed them to
+ "collections". Much better system now, can handle hyperedges,
+ subgraphs and other stuff (in principle).
+- Nodes generated by a gd algorithm now have correct size
+ information (this one was tricky!).
+- Redone handling of clusters in gd.
+- Worked on gd documentation.
+- fixed minor expansion issue \foreach \x in {a,...,d} lead to unexpanded value \x
+- externalization: added special switch to deactivate incompatible
+ geometry drivers during externalization
+- Redone pgf.gd.model.Arc
+- Added documentation for said class.
+- Worked on gd documentation.
+- Replaced old luadoc by customized version. Gets called
+ directly from tex.
+- external lib: added support for MD5/diff based up-to-date checks.
+ Changes to a picture will automatically result in a remake of the
+ respective external graphics.
+- Fix bug #3527068 (\pgfmathatantwo did not exist)
+- Changed pgf.gd.new_graph_drawing_algorithm syntax. Not
+ likely to change again...
+- Added support for algorithms to create nodes and edge in the
+ syntactic digraph.
+- Introduced library graphdrawing.examples that includes some
+ code demonstrating how "things are done".
+- context: fixed catcode issues by means of suitable module
+ \protect/\unprotect statements.
+- Introduced a new class model for graph drawing (Digraph,
+ Arc, and Vertex instead of Graph, Edge, Node). I'm currently
+ porting all the old code, but it takes a while and it's a
+ bit messy right now. Some easy algorithms are already based
+ on the new system, old ones not. In the end, things should
+ be significantly faster and also easier to program.
+- Attempt to fix bug in calc lib when '!' or ':' are active (not
+ fully tested but should work).
+- Attempt to fix bug with label and pin when ':' is active (not
+ fully tested but should work).
+- Finished the first two chapters of the documentation of gd
+ (overview and tikz usage).
+- Module system is now redone and the directory structure
+ has been reorganized. No more messing around with lua
+ modules, everything is perfectly portable now.
+- Started to completely redo the module system of graph
+ drawing in lua. I'm in the middle of it, so its currently
+ messy, but it works.
+- Implemented packing procedure for graph drawing.
+- Cleaned up graph drawing source some more.
+- Renamed lots of files (still not happy with it, though).
+- Implemented Reingold-Tilford tree layout.
+- Implemented my first graph drawing algorithm: circular layout.
+- Introduced new declaration mechanism for graph drawing
+ algorithm classes
+- Implemented preprocessing step of decomposing a graph into
+ connected components.
+- Cleaned up graph drawing algorithm directories: Moved
+ obsolete algorithms to special directory.
+- Switched graph drawing calling interface from function-base
+ to object-based: All graph drawing algorithms must now be
+ implemented in a class
+- Cleaned up file and class names of graph drawing engine.
+- Fixed problem that in case math library is loaded before pgf
+ some math functions were broken (because \pgfmath@xa and
+ \pgf@xa were different registers, which they should not be).
+- Added anchoring and orientation to graph drawing library.
+- Added arrows.spaced library.
+- Added quotation syntax to graph lib.
+- Renamed some graph drawing layouts.
+- Worked on documentation of graph drawing lib.
+- Moved wrappers for luatex primitives (\pgfutil@directlua,
+ \pgfutil@ifluatex, \pgfutil@luaescapestring) to pgfutil-common.tex
+- Added support for luatex to the profiler library by emulating
+ \pdfelapsedtime.
+- Fixed wrong edef in graph lib that broke the /-syntax when
+ text contained expandable stuff.
+- More work on the luamath parser and evaluator.
+- Fix a bug in tikz polar coordinates (reported on tex.se
+ http://tex.stackexchange.com/questions/41828/using-math-in-tikz):
+ braces around a delimited argument are removed.
+- Fix a bug in pgfmath != operator (reported and fixed on tex.se
+ http://tex.stackexchange.com/questions/40605/using-in-pgfmathparse)
+- Fix a pgfmath dependency for pgffor.
+- Added pos support to the arc command (finally...).
+- Added support to the graph library for drawing tries.
+- Added support to the graph library for adding edge labels in
+ an easier way.
+- Added the 'fixed relative' number formatting style.
+- Added 'const plot mark mid' and 'jump mark mid' plot handlers.
+- Renamed "layered drawing" to "layered layout" for
+ consistency.
+- More work on the lua math parser and evaluator.
+- Added wrappers for luatex primitives: \pgfutil@directlua,
+ \pgfutil@ifluatex, \pgfutil@luaescapestring
+- Make lua code more lua 5.2 compatible
+- Work on the lua math parser and evaluator. Begin to merge Mark's
+ code with mine.
+- added FPU support for ==, !=, <=, >=, ?
+- fixed problem with pgf number printer: it introduced spurious spaces
+ tracker id 3430171. Thanks to Clemens Koppensteiner for the bugfix.
+- \pgfsetlayers can now be given inside of a pgfpicture (or tikzpicture)
+- The lua math parser now works on basic expressions (no units, no
+ arrays, no strings, no functions, ...?).
+- Some work on a lua (lpeg based) math parser.
+- Added a gnuplot call key to pgfmoduleplot.code.tex (feature
+ request #3308340).
+- graph drawing:
+ - Initial work on layered drawing algorithms.
+- Added dim function for array to pgfmath (to be documented)
+- Some work on a ODE solver
+- removed spurious white spaces in my bugfix for pgfmathdivide
+- Second attempt at fixing spy lib...
+- graph drawing:
+ - added short overview for nodes and edges (lua class documentation)
+- graph drawing:
+ - Separate 'spring layout' and 'spring electrical layout' families.
+ Rename existing algorithms accordingly.
+ - Add an implementation of the Floyd-Warshall algorithm.
+ - Add a new 'Hu2006 spring' algorithm based solely on springs.
+ - Improve the initial layout of 'Hu2006 spring electrical' by
+ taking the graph size and diameter into account.
+ - Rework existing spring electrical algorithms and improve
+ documentation.
+ - Catch -!- edges and remove them from the Lua graph when detected.
+- graph drawing:
+ - Update documentation of spring and spring-electrical parameters.
+ Add TODO items where things are missing, unclear or need to be
+ worked on.
+ - Make initial step dimension and the electric charge of nodes
+ configurable. Both, Walshaw2000 and Hu2006 support this.
+ - Improve the approximation of the repulsive force.
+- Fixed bug 3297817 (spy postscript problem).
+- Fixed bug of missing newpath in postscript and opacity
+ settings.
+- graph drawing:
+ - Rename graphdrawing.spring to graphdrawing.force.
+ - Fix NaN bug in the orientation helper.
+ - Initial work on improving and documenting the parameters for
+ spring and spring-electrical algorithms.
+ - Properly forward default node and edge parameters to Lua.
+- graph drawing:
+ - Add Fibonacci heap and priority queue classes.
+ - Add Lua file for common graph algorithms. Implement Dijkstra.
+ - Add method Graph:getPseudoDiameter().
+ - Hu2006: Scale coordinations of nodes in a coarse graph based on
+ the quotient of its pseudo diameters and that of the parent coarse
+ graph, as described in the paper.
+- graph drawing:
+ - Fix several interpolation bugs in the coarse graph class.
+ - Use the coarse graph class in the Walshaw2000 algorithm.
+- Worked on documentation of gd backend. Still need to
+ document graph parameters.
+- graph drawing:
+ - Remove files from the old graph drawing library tree.
+ - Disable verbose logging by default.
+ - Specify sane initial values for spring algorithm parameters.
+- Added .graph drawing parameter initial key.
+- graph drawing:
+ - Implement graph coarsening in the Hu2006 algorithm.
+ - Name force-based algorithms after the paper author and year.
+- Reorganized graph drawing documentation.
+- Finished the graph drawing library reorganization started by Till.
+- Reorganized the graph drawing key and directory
+ structure. The documentation is still missing. Also, lots of
+ files still need to be moved, but I'll leave that to Jannis.
+- graph drawing:
+ - implement a quadtree optimization in the Walshaw algorithm.
+ - add a simple version of the Hu spring-electrical algorithm that
+ seems to work almost as good as the Walshaw even without
+ the multilevel approach implemented (which is the only thing
+ that really makes the Walshaw algorithm useful).
+- graph drawing:
+ - Initial work on a quad tree implementation for spring and spring
+ electrical algorithms, with unit test.
+ - Improve the internals of the Vector class.
+- graph drawing: Started to cleanup pgf and tikz layers. Ongoing...
+- graph drawing:
+ - Fix Walshaw algorithm to properly set the subnodes when copying
+ the coarse graphs. Simplify the code that updates the node
+ coordinates.
+- graph drawing:
+ - Modify the doclet to allow underscores in parameter names.
+ - Document the Vector class as well as the table, iter and traversal
+ helpers.
+ - Remove old table and iterator helpers. Rename helper files. Rename
+ table.merge() and table.copy() to table.custom_merge() and
+ table.custom_copy() to avoid name clashes with luatools. Add
+ string helpers, including string.parse_braces(). Update algorithms
+ to work with these changes.
+ - Allow vectors to have an origin vector, similar to the Position
+ class. Introduce new alternative table-based syntax for
+ Vector:set() that is much easier to read. Update unit tests
+ and algorithms.
+- fpu: added support for log10 and log2
+- graph drawing:
+ - Drop the 'not yet positionedPGFGDINTERNAL' node name prefix
+ internally. It's stripped off now when nodes are passed over to
+ Lua and its added back again when shipping the node out to TeX.
+ - Drop the Node:shortname() method which is no longer needed.
+ - Improve coding style and documentation of the Interface, Sys,
+ Node, Edge and Graph classes.
+ - Rename Sys:logMessage() to Sys:log().
+ - Make parameter labels in the API docs not appear in bold.
+ - Disable verbose logging by default.
+ - Add methods Edge:getNodes() and Node:getEdges().
+- graph drawing:
+ - Initial work on spring-electrical and layered drawing algorithms.
+ - Major rework of the Lua code of the graphdrawing library: added
+ a Vector class for improved math operations and node positioning,
+ added quite a number of table and iterator helpers, added
+ post-processing code for fixing the orientation of graph drawings,
+ updated the graph/node/edge data structures to store nodes in the order
+ they appear instead of storing them in a random order, implement
+ coordinate keys for nodes, and much more.
+- number printing: added '1000 sep in fractionals' switch
+- Work on pgflibraryluamath (added pgfpointnormalised)
+- Graphdrawing library documentation, split into two files, removed
+ noluatex file, reworked the text (added information).
+- First attempt to do math with lua (very basical): pgflibraryluamath
+- bugfix for rounding error in \pgfmathdivide{83.407811000}{16.68156400}
+ was 4.10, is now 5.0: it could happen in rare cases that digits where
+ appended where they shouldhave been than added (4 + .10 instead of 4 + 1.0)
+- Implemented a G_n subgraph for creating grid (or: mesh) graphs.
+ This also introduces a new key /tikz/graphs/wrap after=<number> that
+ configures how the nodes in such a grid graph are connected. Some of
+ the common subgraph keys such as /tikz/graphs/V and /tikz/graphs/n
+ can be used with G_n subgraphs as well.
+- Added a simple grid placement strategy. It currently does not
+ support the chain shift and group shift keys properly and does not
+ implement any placement order other than left-to-right, so there is
+ room for improvement.
+- external lib: reduced number of \newwrite allocations and allowed to disable features
+ to safe more of them (aux in dpth=false,disable dependency files)
+- added '/pgf/number format/relative' formatting style.
+- Finished documentation of data visualization (sort of)!
+- First usable version of data visualization!
+- Worked on dv documentation. Finished chapter on visualizers,
+ style sheets. Legends still missing
+- Worked on dv documentation. Finished chapter on axes.
+- Incorporated a bugfix of Hans Hagen which makes pgf compatible with
+ Context Mk IV.
+ Verified: the patch is backwards compatible with TL 2009 and TL 2010
+ i.e. Context MkII and it works with Context Mk IV.
+- Worked on dv documentation.
+- Attempt to fix a bug #1911195 with pgfpages and rotation (fix
+ contributed by Mark Wibrow). Note: Mark was not sure it has side
+ effects.
+- Documentation will now compile with auto-xref enabled (a problem
+ with \_ in the graph lib not handled correctly by
+ pgfmanual.pdflinks.code.tex).
+- Fix bug #3104978 thanks to Heiko Oberdiek patch on ctt.
+- Changed the graph syntax for anonymous nodes in the graph
+ library and simplified the as= syntax.
+- Added fresh nodes options to graph library.
+- Fixed graph lib so that it compiles with plain TeX.
+- Small fixed in the graph library.
+- Finished graph library!
+- Nearly finished graph lib and its documentation.
+- Fixed bug #3123605 (hopefully...).
+- Worked on graph lib.
+- Some integer arithmetics functions for the math parser
+ (contributed by Alain Matthes): gcd, isprime, isodd, iseven
+- Second attempt at making \tikz work also with fragile stuff
+ following. The new code will no longer fail in a situation
+ like \tikz \foreach ...
+- Worked on graph lib stuff.
+- A luatex version of the doc is available (fixed inputenc issues
+ since luatex works with utf8 by default).
+- Fix bug in pgfmathfunctions.basic.code.tex (bug reported by
+ Alain Matthes and fixed by Paul Gaborit on fctt): wrong
+ interaction between pow and exp (linked to \pgfmath@x modified
+ outside macro call).
+- Make \pgfkeys@exp@call long (bug reported by Florent Chervet on
+ fctt)
+- Fix bug in pgflibraryshapes.callouts.code.tex: \pgf@test changed
+ to \pgf@node@name (bug reported by Zarko F. Cucej on ctt and fix
+ contributed by Mark Wibrow)
+- fixed bug 3096333 (Fix contributed by Mark Wibrow): pgffor
+ failed to update \lastx in some cases
+
+### Contributors
+
+- Christophe Jorssen
+- Jannis Pohlmann
+- Mark Wibrow
+- Matthias Schulz
+- Till Tantau
+
+## [2.10] - 2010-10-25 Christian Feuersaenger
+
+### Changed
+
+- closed a lot of bugs on sourceforge, especially documentation bugs
+- fixed bug 2429749: gnuplot invocation in tabularx did not work.
+- fixed bug: there was an incompatibility between pgf and beamer due to a
+ missing \interlineskip in the shipout handling for latex.
+- renamed 'halfcircle' marker to 'halfcircle*' and added 'halfcircle'.
+- provided special case 'mark color=none' for the half-filled markers.
+- fixed incorrect fill/stroke coloring of new marker contributions (see
+ ChangeLog 2010-09-27)
+- added more predefined dashed and dotted line patterns for black/white plots
+ to fulfill a related feature request of Tomek
+- fixed bug: the 'name path global' feature did not work in every case...
+ the actual implementation might need to be revised eventually.
+- Imported spell checking results of Stefan Pinnow (thanks!)
+- Dealed with typo in 'sci generic' number formatting style: it now
+ accepts 'mantissa' *and* 'mantisse'
+- External lib: Fixed bug. The 'failed ref warnings for' was not properly \protect'ed.
+- Started on graph lib. Not yet finished and not documented.
+- Added plot markers of Magnus Tewes and Tomek: halfcircle, halfsquare*,
+ halfsquare left*, halfsquare right*, heart
+- Added \pgfpositionnodelater and \pgfpositionnodenow
+ commands.
+- externalization+\ref: fixed a bug
+- external lib: documented how to generate .png graphics and added support
+ switches.
+- added 'baseline=default', 'trim left=default' and 'trim right=default' choices to reset these keys.
+- added support to provide paragraphs in "pin" arguments
+- Worked on data visualization and its documentation.
+- basic level externalization: added \hoffset=0pt and \voffset=0pt to improve
+ compatibility with special document classes
+- added docs for \deferredanchor feature contributed by Christophe Jorssen
+- ConTeXt support: fixed loading problem of calendar lib
+- pgfsys-tex4ht.def: fixed problem with \par in a non-long macro argument,
+ thereby eliminating a compilation problem
+- pgfsys-tex4ht.def: renamed offending macro invocation \Par to \par
+- basic level image externalization: added '/pgf/images/trim external={<left>}{<bottom>}{<right>}{<top>}'
+ to allow modifications to the hardcoded '1truein' shifts.
+- added '/.style n args' key.
+- \usetikzlibrary / \usepgflibrary: added support for white-space trimming
+ and empty arguments in the lists. Now, lines do not need to be terminated
+ by '%' and ',,' is valid.
+- external lib: documented how to solve compatibility problems with
+ \tikzifexternalizing
+- added \deferredanchor feature contributed by Christophe Jorssen
+- added optimized and numerically stable arc path command
+ \pgfpatharctoprecomputed which interpolates start- and end points
+- external lib: fixed incompatibility with 2010/06/08 v2.0b eso-pic package
+- external lib: added sanity checking for failed \ref,\pageref,\cite commands in external images.
+- math parser: improved error messages by providing the complete math expression.
+- added 'trim left' and 'trim right' features to simplify bounding box
+ modifications and allow support for restricted bounding boxes and image
+ externalization.
+- pgfutil-latex.def: changed \usepackage to \RequirePackage (thanks to Christophe Jorssen)
+- external lib: added \tikzappendtofigurename{} shortcut for '\tikzset{external/figure name/.add={}{suffix}}'
+- external lib: added warning at end of document if not all graphics have
+ been found.
+- updated file 'tikzexternal.sty' for \label and \ref support inside of
+ externalized graphics
+- documented how \label and \ref support in external graphics works.
+- activated \label support for mode=convert with system call and
+ documented limitations.
+- added \tikzifinpicture{<true code>}{<false code>} macro
+- Worked on data visualization.
+- Added .list key handler.
+- Worked on data visualization.
+- improved sanity checking in number printer: now, the zero flag is
+ checked even if its exponent > 0
+- floatparsenumber: number format errors after exponents now contain the offending
+ character instead of '\relax'
+- number printer: added 'frac denom' and 'frac whole' for fine tuning of
+ fractional number printing.
+- number printer: made \protect portable across TeX variants (doesn't
+ produce bugs with context anymore)
+- fpu: optimized \pgfmathfloatgetflagstomacro
+- added \pgfresetboundingbox
+- added \pgfgetlastxy coordinate macro
+- added '/pgf/images/include external/<image name>' code key.
+- fpu: added convenience method \pgfmathfloattoint
+- number printer: added 'frac' style to automatically create fractionals.
+- splitted basic level file pgfcoreimage.code.tex: there is now a
+ pgfcoreexternal.code.tex file.
+- \pgfmathprintnumber is no longer a "fragile" command (it is \protect'ed
+ automatically in LaTeX).
+- Fixed baseline alignment with "text width" option in LaTeX.
+- New divide function
+- Rewrote code foreach extensions. Now no longer an impenetrable mess.
+ pgffor.code.tex is much larger, but contains some (as yet) undocumented
+ features which may get optimised out.
+- Image externalization: added '/pgf/images/aux in dpth' feature.
+ It allows to store \label and other .aux file related stuff in the image's
+ .dpth file which is processed when when the main document includes the
+ image.
+ The new switch is on for the semi-automatic modes of the external lib, otherwise it is
+ off.
+- pgfkeys: added '.code n args' handler. The difference to '.code
+ args={#1#2#3}' is that keys defined with 'code n args' gobble spaces
+ between the arguments.
+ Note: 'code 2 args' remains as-is (it has the special feature that the
+ second argument is optional).
+- fixed bug in '/.add code' key handler: it didn't work properly for
+ complicated keys
+- pgfkeys manual section: updated xrefs and docs
+- external lib: \tikzexternalize no longer needs (but still accepts) the
+ main job's name. Changes are now documented and the replacement |.sty|
+ file has been updated.
+- intersection lib: added 'name path global' feature.
+- external lib: partially fixed incompatibility with glossary package and
+ documented work-around
+- FPU: added \pgfmathfloatifapproxequalrel
+- number printing: added style to configure |sci precision|
+- number printing: added style to configure |std=<lower e>:<upper e>|
+- external lib: the <real job's name> argument from \tikzexternalize is
+ now optional. It can be deduced automatically if it is missing.
+- number printing: added 'sci generic' style to customize the appearance
+ of scientific format and a 'verbatim' style which doesn't use TeX macros
+ for the formatted numbers.
+- external lib: now, a |\jobname.auxlock| file will be generated in order
+ to detect whether the \jobname.aux file is in its final state. This allows
+ to export any images containing |\ref{}| manually; the automatic procedure
+ will not use the .aux file.
+- Added \ifpgfexternalreadmainaux switch. Will be used to avoid buffering
+ problems during externalization mode 'convert with system call'.
+- Fixed bug "papersize not supported by pgfsys-xetex.def - ID: 2934982"
+- Improved automatic cross referencing: auto key path prefixing failed for
+ spaces in key paths.
+- Added "on background layer" key to backgrounds lib.
+- added \pgfmathifisint
+- supported \nofiles in auto xref generation
+- externalization: both, basic layer and external lib now support \ref{}s
+ inside of externalized pictures. Furthermore, they won't generate any aux
+ files on their own (which wouldn't be thread safe and is not useful
+ anyway)
+- external lib: fixed bug with figure list/makefile handling and file
+ deps: calling file dependency handlings outside of a picture could result
+ in compilation failures
+- external lib: mode=list and make now supports the force remake keys.
+- external lib: the -shell-escape switch for nested system calls is
+ activated only if it was active for the main document. This should allow a
+ reasonable security measure for mode=list and make (which will also work
+ without system calls from within TeX).
+- external lib: added support for file dependencies.
+ For mode=list and make, any file dependencies configured with
+ \tikzpicturedependsonfile{<name>} will be checked by the generated
+ makefile.
+- profiler library now uses an output file which contains the current date
+ and time. Furthermore, it counts every invocation and allows to show every
+ command invocation (optionally with arguments expanded).
+- profiler library can now profile macros with arbitrary argument pattern
+ and is more rebust with respect to save stack usage
+- worked on profiler library and added docs for it.
+- added first draft of the pgf 'profiler' library
+- Fix for rounded corners affecting custom fills in rectangle
+ split shape.
+- updated the 'make dist' documentation target such that it compresses
+ every pdf object. The resulting manual is half as large than without
+ compression, but it requires pdf 1.5 (at least acrobat 6.0).
+- external lib: some output messages did not respect the 'verbose
+ IO=false' flag; fixed that
+- fixed buggy treatment of some automatic cross references in manual
+- external lib: improved the tikzexternal.sty package which can be used
+ without pgf installed.
+- added spy library.
+- imported a patch of Andy Schlaikjer which extends the 'plot gnuplot'
+ feature to read the “unbounded point” information provided by gnuplot.
+- added \r@pgf@reada temporary \openin register for compatibility with
+ other packages
+- fixed an auto xref bug which wrote '\pgfkeys{}' although the manual
+ contained |\pgfkeys|.
+- external lib: the 'optimize command away' things where not activated
+ accidentally. I fixed it.
+- added support for new paragraphs in pgfkeys values
+- fixed bug in |const plot| handler (and all its variants): the first
+ coordinate was transformed twice
+- auto xrefs now support point coordinate systems.
+- auto xrefs now provide an interface to deal with tricky active
+ characters (for |-)
+- external lib: improved compatibility with |fadings| libary.
+- replaced 'set terminal table; set output "<file>"' by 'set table "<file>"'
+ to maintain compatibility with the new gnuplot version.
+- pgfmanual.pdf: provided a 'make dist' target in version_for_pdftex/en
+ which activates automatic hyper references from codeexamples to key
+ declarations.
+ This utilizes larger memory limits, configured in
+ doc/generic/pgf/text-en/texmf.cnf
+- Added the 'small mindmap' style.
+- FPU: improved sanity checks and exception handling for the decompose
+ routines (pgfmathfloatgetexponent etc) and the number parser.
+ Added exception 'wrong lowlevel format'.
+- renamed 'text mark/style' to 'text mark style' and 'text mark/as node'
+ to 'text mark as node' (there are backw. compatibility hooks).
+ This should avoid confusion with '.unknown' handlers.
+- improved error recovery of external lib.
+- temporarily disabled the auto cross references -- it seems they compile
+ only with increased memory.
+- Installed preliminary version of automatic cross referencing tool.
+ Now, every codeexample is parsed for options and control sequences which
+ have been defined somewhere else in the document; pdf cross references are
+ built automatically as well.
+- configured links to be blue throughout the document.
+- external lib: added \tikzexternaldisable such that partial externalization is possible
+ although the document contains unsupported constructs (where environments
+ can't be identified without macro expansion).
+ The pgfmanual compiles with image externalization now.
+- added \pgfutilsolvetwotwoleq to solve 2x2 linear equation systems using
+ column pivotisation and gauss elim. Should result in improved quality
+ compared with \pgftransforminvert as internal equation solver
+- Defined \pgfdeclaregenericanchor to allow anchors which get the shape
+ name as argument. Only useful internally.
+- Fixed buggy treatment of white spaces in \jobname and 'plot function'
+ using \pgfutilpreparefilename.
+- Fixed bug item #2834141 [wrong reversed double arrows]
+- Fixed bug item #2834233 [shapes libraries]
+- Fixed bug item #2822265 [tangent coordinates not working in CVS]
+- Changed \rm to \tf in Context.
+- external lib: added 'mode=list and make'. Now, image externalisation
+ time can be reduced with 'make -j 2 -f mainfile.makefile'.
+- external lib: fixed treatment of long arguments in \tikz ... ; shortcut
+ command.
+- fixed white space bug in \pgfkeysdeactivatefamily
+- added \pgfmathfloatvalueof
+- added a '*' feature to '\pgfmathdeclarefunction' which overwrites
+ existing functions.
+- added '/tikz/no marks' key.
+- fixed typo in external lib documentation: the key is called 'figure name',
+ not 'file name'
+- added \pgfgettransformentries and \pgfsettransformentries.
+- updated the external library such that it deals with active characters
+ in the same way as without external library.
+- fixed bug in fpu cosh, sinh and tanh
+- provided two new aliases for key filters, added \pgfkeyssetfamily.
+- allowed numbers like '.9' in fpu.
+- Fix for signal shape.
+- Applied the patches for dvipdfmx driver,
+ pgf-doc-diff.version2cvs (2009-04-18) and
+ pgf-generic-diff.version2cvs (2009-04-19).
+- Restored processing of unknown keys in the predefined key filters 'and',
+ 'not', 'or' and 'false': it was not improvement...
+- fixed the sequence of arguments of
+ \pgfqkeysactivatefamiliesandfilteroptions and
+ \pgfqkeysactivatesinglefamilyandfilteroptions
+ in the reference manual.
+- key filtering: the composed key filter handlers 'not', 'and', 'false' and 'or' now
+ ignore unknown options and call the .unknown handlers.
+- pgfkeys: removed the experimental \pgfkeyssetdefaultpathforhandled method.
+ It doesn't fit into the clean interface for pgfkeys - and the problem of
+ default paths for handled keys can be solved better with the '/handler
+ config' method.
+- provided API function \pgfmathfloatifflags to simplify special cases in
+ FPU.
+- added (primitive) veclen implementation for FPU.
+- added cosh, sinh, tanh to FPU
+- fixed bug in external lib: empty lines in tikzpicture environments were not accepted
+ for some operating modes.
+- added \pgfqpointscale
+- added an optional argument count to 'optimize command away' in external
+ library.
+- added the |figure name| key to the externalization library
+- improved docs for externalization library
+- improved sanity checking of floating point comparison: does now also
+ yield results for infty/nan
+- added fix for precedence bug for unary minus (fix has been suggested by
+ Mark Wibrow, by mail conversation)
+- Replaced \z@ by 0pt for context.
+- external library: fixed the 'optimize' feature: pictures which won't be
+ exported could not be optimized away (although they should)
+- Replaced \toks@ and \voidb@x by \pgfutil@toks@ and
+ \pgfutil@voidb@x.
+- improved docs for .search also.
+- fixed initial value for 'domain' such that it really uses the default
+ samples=25.
+- Added patch for context color support in luatex.
+- improved the optimization facilities of the external library:
+ |optimize=false| will now properly restore any optimized material
+ when used in \tikzset
+- added |/handler config=all,only existing,full or existing|
+ configuration.
+- added |.search also| key handler as a simple implementation of key
+ search paths.
+- fixed default value for /tikz/samples at- there are no really 25
+ samples, not 26. I forgot to fix this last time when I fixed 'samples'
+- added |\pgfkeyssetdefaultpathforhandled| feature as improvement for
+ multiple key paths to pgfkeys. Reference documentation and an
+ application example is in the manual.
+- added 'mark=text' which draws arbitrary TeX content as plot marks to
+ plot mark library.
+- Added key 'define function' to define simple local functions.
+- Worked on dv stuff.
+- Index argument to array is automatically truncated to an
+ integer.
+- Text decoration can now be aligned along or fitted to a path.
+- Added key '/pgf/decoration/reverse path' to decorate a path
+ backwards.
+- the FPU deactivation command is now assembled once and for all during
+ its first usage.
+- Changed the "ellipse", "circle" and "arc" commands, so that
+ they take options. This gives a much clearer and more
+ flexible syntax. Naturally, the old syntax continues to work
+ as expected.
+- Documented svg stuff and added tikz interface. Most useful
+ for quickly converting svg pictures to tikz pictures...
+- fixed fpu 'round' method - it rounded mantissas instead of the complete
+ number before.
+- Fixed some math stuff
+- Renamed \pgfpathcurvebetweentime* to
+ \pgfpathcurvebetweentimecontinue.
+- Added svg.path lib. It allows one to directly use
+ the svg syntax for paths (like "M10 10 L 20 20"). Not yet
+ documented.
+- Added tutorial for mind/lecture maps.
+- implemented fpu factorial
+- if the fixed point library is activated, the fpu will be deactivated
+ automatically.
+- added draft for FPU documentation
+- fixed bug in fpu sqrt.
+- added logical commands to fpu.
+- fixed bug in fpu related to multi-argument-commands
+- provided feature to disable fpu manually.
+- added support for pgf 2.00 and the fpu (works only with additional
+ and technical work - the fpu file is not all which is needed)
+- added pow and greaterthan to FPU
+- fixed some FPU issues
+- fixed processing of '/tikz/domain' key - it produced N+1 samples instead
+ of N.
+- added further functions to fpu; improved sanity checking; fixed smaller
+ bugs related to fpu
+- improved internal floating point code: it is possible to change the
+ low-level representation with minimal number of code lines.
+- modified low-level floating point representation. All high level code
+ should be completely unaffected; the changes are backwards compatible.
+- Wrote first draft of a floating point unit library (fpu) similar in
+ spirit to the fixed point library of Mark Wibrow.
+- Moved all floating point math operations (functions) into the fpu
+ library. It is now necessary to include the library in order to use
+ floating point math operations. The number formatting methods are still
+ available as before.
+- added trigonometric functions to floating point unit.
+- Added \colorlet to ConTeXt stuff.
+- Worked some more on data visualization stuff. Still in
+ pre-alpha.
+- added \pgfmathfloatexp.
+- floating point macros now always use the basic pgf math methods for
+ mantisse computations, even if the fixed point library is active.
+- 'mark=none' is now equivalent with 'mark=' (disables plot marks).
+ The previous behavior was to issue \pgfuseplotmark{none} which is
+ equivalent to \relax (and wastes time).
+- Changed exp function code in
+ pgfmathfunctions.basic.code.tex. It is now *much* more
+ precise for negative values and also more precise for
+ positive values.
+- optimized \pgfmathfloattofixed for speed (although it introduces
+ redundand zeros)
+- Added '/pgf/image/include external' command key as public interface
+ to modify the '\includegraphics' command in image externalization routines.
+- fixed bug with |overlay| option and matrizes: now, cell pictures won't
+ collapse any more if the matrix has |overlay| enabled. However, the
+ matrix' bounding box won't contribute to the image as desired.
+- added support for active '!' characters (for example in blue!30!black
+ and french babel setting)
+- modified processing of 'domain' option: the argument is '\edef'ed such
+ that any potentially active ':' characters will be expanded to non-active
+ ones (avoiding errors in the following processing).
+- Fixed \pgfnodealias bug that caused chains to fail in matrices.
+- Added shading library, mainly containing the new color wheel
+ shading donated by Ken Starks.
+- More fixes for insertion of spaces.
+- Added square arrow send by
+ gvtjongahung@users.sourceforge.net.
+- Changed pgfutil-context.def so that driver detection should
+ work once more.
+- Fixed insertion of space when parsing exponents.
+- added int truncation to floating point unit.
+- added abs, abserror and relerror to floating point unit.
+- added sqrt for floating point unit, built on top of pgfmathsqrt.
+- Fixed the wrong lengths of support vectors for circles. Used to
+ be 0.555 (found by trial and error), while the correct value
+ is 4/3*(sqrt(2)-1) = 0.5522847, which gives much better
+ circles.
+ Thanks to Ken Starks for point this out.
+- Fixed rounded rectangle right arc bug.
+- Fixed missing treatment of 'assume math mode' in \pgfmathprintnumber'
+- Fixed missing switching off of auto anchors in positioning
+ library.
+- Fixed matrix/pdfsync incompatibility.
+- Fixed some parsing bugs with arrays.
+- Fix for parsing of arrays in TikZ coordinates.
+- Added number formatting option 'min exponent for 1000 sep'.
+- Fixed bug in math parser which inserted spaces into text
+ or picture.
+- added number formatting style 'sci superscript'
+ Example: formats the number 42 as 4.2^1 instead of 4.2 \cdot 10^1
+- Fixed bug "TikZ, the shadow library and ConTeXt MKIV
+ (LuaTeX)".
+- Fixed bug #2105132 for rounded rectangle.
+- Fixed bug #2044129 for chamfered rectangle.
+- Added \pgfpathcurvebetweentime.
+- Fixed problem with nodes on a line inside a picture that is
+ inside a node of another picture. Pictures will now always
+ start with "pos=.5" set.
+- Slight hack of decorations so that the input path can consist of a
+ single move to. This enables stuff like
+ \path [decoration={some decoration}, decorate] (4,5);
+- fixed small bug related to '@dec sep mark' and not-a-number in number
+ formatting routines.
+- Solutions for path intersections can now be sorted along either path.
+- \pgfintersectionsolutions is now a macro, not a count register.
+- fix for `Missing character...` warnings in logfile when using
+ foreach.
+- removed `trim integers' option from foreach as int function
+ can now be used.
+- Rewrote math parser. Anyone who relies on, or has hacked internal
+ parser or function macros, or has defined their own functions for
+ the parser will need to reconsult the code and/or documentation.
+- Files for functions definitions split (possibly permanantly) into
+ different files.
+- Scaling of results at the end of the parse is no longer the default
+ action. This doesn't break PGF or TikZ, but it may break user code
+ that depended on this scaling. To turn it back on use
+ \let\pgfmathpostparse=\pgfmathscaleresult.
+- Modifying existing functions or creating new functions must now be
+ done using \pgfmathdeclarefunction and \pgfmathredeclarefunction.
+- Single argument functions do not need parentheses, provided the
+ funtion is followed by a space, so sin 60 is the same as sin(60).
+ But! Functions have the highest precedence, so sin 60*\x is the
+ same as sin(60)*\x.
+- Added {} operators for array specification and [] operators for
+ array access - see docs for details.
+- added postfix ! factorial operator.
+- added c++/java style conditional e.g., \x > 10 ? 13 : 20.
+- added >=, <=, !=, prefix !, &&, || operators.
+- added atan2, log10, log2, e, int and frac functions.
+- adapted cosh, sinh and tanh from Martin Heller.
+- added lua-style random function for generating random integers.
+- added Mod function (note capital letter). Uses floored division
+ and is never negative.
+- min, max, veclen and pow can now be nested in any argument
+ position.
+- min and max can now take a variable number of arguments.
+- For compatability \pgfmathmax and \pgfmathmin still take two
+ arguments (although these can contain comma separated expressions).
+ However \pgfmathmin@ and \pgfmathmax@ now only take
+ one argument in the form \pgfmathmin@{{1}{2}{3}{4}{5}} (for 5
+ arguments).
+- added hex, Hex, bin, and oct functions. These functions will not
+ work properly if the post-parse scaling is turned back on.
+- 0 prefix for integers now specifies an octal number which is
+ automatically converted to base 10.
+- 0x or 0X prefix for integers now specifies a hexadecimal number,
+ which is automatically converted to base 10.
+- 0b or 0B prefix for integers now specifies a binary number,
+ which is automatically converted to base 10.
+- "" characters turn off parsing (!) for part of an expression.
+- added width, height, and depth functions for text e.g.,
+ width("Some text"), but as an expression is \edef'ed before
+ parsing other commands will have to be `protected` e.g.,
+ width("\noexpand\Huge Some text").
+- bugfix for tan and cot.
+- added '/tikz/external/export={true,false}' key for externalization
+ library.
+- added documentation for basic layer externalization and baseline option.
+- added 'showpos' key to number printing (and alias 'print sign').
+- fixed typo in pgfmathfloat.code.tex
+- added 'optimize command away=\macro' key to externalization library. It
+ allows to discard unnecessary and possibly expensive user macros during
+ export (unnecessary = not in selected picture).
+- Fixed bug in system layer path collecting. Very long paths
+ are now processed more efficiently (the bug disabled an optimization).
+- added "marker" positions into the output of number formatting routines
+ to find period positions (even if no period is typeset) and exponent
+ positions. Allows alignment within auxiliary routines.
+- Fixed dash phase bug.
+- Fixed missing library include in automata lib.
+- Added "align" option. "text ragged" and friends are now
+ deprecated. Text width need no longer not, but can, be
+ specified. The following now has the expected effect: \node
+ [draw,align=center] {Hello\\world.};
+- added \pgfqpointxy and \pgfqpointxyz to complement the "quick" point
+ commands in basic layer.
+- added 'every mark' style.
+- 'mark options' simply overwrites 'every mark' (consistent with its old
+ definition)
+- Finished circuit library and documentation (well, some
+ shapes still missing, but that's something users should
+ contribute).
+- the external library now handles active double quotes ",
+ single quotes ', and active semicolons ';' in its system call
+ correctly. Furthermore, \\ will expand to a normal
+ backslash. The initial system call now uses double quotes
+ for indows compatibility, it also contains the shell-escape
+ feature for gnuplot invocations.
+- Did some documentation of circuit lib.
+- Removed the separated documentation of the intersection
+ library and made this documentation part of the main
+ documentation.
+- The intersection cs is now deprecated, the documentation
+ is now only based on the intersection lib.
+- Added a "by" option so that "name intersections={of=A and
+ B,by={c,d,e}}" will create an alias c for intersection-1, d
+ for intersection-2 and e for intersection-3.
+- Renamed "path name" to "name path" in the intersection
+ lib. This is more consistent with "name intersections".
+- Minor changes on float stuff, wrote pgfmathfloatmultiply and
+ pgfmathfloatdivide on top of pgfmathmultiply and pgfmathdivide
+- Added `Fixed Point Arithmetic' library, which provides
+ a parsing interface to the fp package. Dealing with plotting
+ files still a bit crude.
+- This library means the manual now requires the fp pacakge
+ to compile.
+- Fixed floor function for negative numbers.
+- Fixed \pgfmathsetseed.
+- Font and group fix for external documentation.
+- Complete change of TikZ intersections (PGF unchanged).
+- Slight hack of the TikZ scopes library to permit local
+ path naming. Should work...
+- Continued with circuit library.
+- Introduced subdirectories inside the pgf library
+ directory and moved libs into them.
+ You may need to update your checkout.
+- The external library now typesets as horizontal material by issueing
+ \leavevmode. This fixes an inconsistency with the normal tikzpictures.
+- Added intersection library + documentation for
+ intersecting “named” paths.
+- Fixed bug in external library. Now, strings like '#1' occuring
+ somewhere in an image is collected correctly.
+- Removed new intersection stuff. Need to restart from scratch...
+- Started working on circuit library documentation.
+- Added PGF code and docs for intersections of two curves and
+ intersections of a line and a curve.
+- Fixed bug in foreach code when registers are used with dots
+ statement.
+- Created first version of circuit libraries for electrical
+ engineering (circuits.ee.*).
+- Added libraries so that ee circuits and logical circuits can
+ be accessed using the same interface. (circuits.logic.*)
+- The tikz lib shapes.gates.logic.* will no
+ longer be needed, the circuits.logic.* will replace them. (The
+ pgf libs shapes.gates.* are still used as before, however.)
+- Minor patch in shapes.gates.logic.US so that the .0 and .180
+ anchors of a not gate or a buffer gate are the same as the
+ input or output anchors.
+- All this is not documented, yet.
+- Worked some more on dv stuff, but nothing to "show", yet.
+- Fixed parsing bug in foreach code.
+- Added "rotate fit" key to fit library, so (e.g.) a rotated
+ rectangle can be fitted around nodes/coordinates.
+- Added documentation for tikz 'external' library.
+- created pgfexternalwithdepth.tex file to use the 'baseline' information.
+- improved some issues of the external library.
+- Added '/pgf/images/draft' option
+- Modified implementation of draft images to show the image file name
+ instead of the internal image name
+- Added tikz library 'external' which allows automatic or semiautomatic
+ export of each tikzpicture to pdf. Documentation is not yet ready.
+- Added self-contained latex package tikzexternal.sty to read those images
+ without tikz/pgf installed.
+- Added support for the 'baseline' option in \beginpgfgraphicnamed ... \endpgfgraphicnamed
+ by storing the box depth into a separate file.
+- Added first ideas for a circuit library.
+- Bugfixes in scoping behaviour.
+- Changed scoping rules for to path operation: Options are now
+ local. This may break existing code, but is much more
+ consistent with everything else and removes other problems.
+- Patched mindmap lib to account for these changed rules.
+- Added insert path option.
+- Deprecated "after node path". Use "append after command" and
+ "prefix after command" instead.
+- Moved datavisualization libraries to separate subdirectory.
+- Changed label and pin options once again, to allow more
+ flexibility. In particular, the angle can now be
+ omitted. Also, for rotated main nodes the anchors are now
+ chosen in more sensible ways.
+- Added tiny little turtle graphics library for fun.
+- Changed scoping rules for \foreach statement on a path: the
+ last coordinate is now persistent not only after the foreach
+ statement, but also between different iterations.
+- Changed positioning of "label" when you attach a label to a
+ transformed shape. The position is now absolute with respect
+ to the page, unless the "transform shape" option is used.
+- Fixed the bug fix for character checking in foreach.
+- Updates and fixes for new foreach code.
+- Fixed bug in new \foreach stuff that causes an error on
+ things like \foreach \i in {1,...,\foo}. If a list element
+ is a macro, no is-it-a-character check is done.
+- Checked in proposed \foreach extensions. Possibly the
+ extensions would be better contained in a pgflibrary...
+- list items can now be evaluated.
+- dots replacement is context sensitive.
+- sequences indicated by dots can be character sequences.
+- a list item can be “remembered” in the next iteration.
+- access to the number of the current item in the list is
+ provided.
+- Worked a bit on data visualization stuff.
+- Added '/pgf/number format/1000 sep' and 'dec sep' shortcut
+ styles which simply call 'set thousands separator' and 'set
+ decimal separator'. Those option are somewhat long...
+- Fixed the "local bounding box" option so that it honors the
+ "relevant for picture size"-if.
+- Fixed buggy "mid left" and "mid right" options.
+- Added "between positions" option to the "mark" option. This
+ makes it possible to create paths with "repeated arrows along
+ the path". This did not work before.
+- Added '/pgf/number format/assume math mode' to disable math checks.
+ This allows to assemble tabulars, apply \pgfmathprintnumber to each cell
+ and use the dcolumn package to align at decimal separators (no
+ documentation for that feature yet)
+- Fixed pgfpages in conjunction with everyshi.
+- Semantics of |/pgf/number format/fixed zerofill| changed: it now simply
+ sets a boolean which affects all numbers in fixed format; it does not
+ SET fixed format. The same holds for sci zerofill.
+- Provided \pgfmathprintnumberto macro in addition to
+ \pgfmathprintnumber.
+- Revised Lindenmayer system stuff. Documentation should
+ now be up to date.
+- Added 'xbar interval' and 'ybar interval' plot handlers.
+- Moved plot handler options to /pgf key tree.
+- added 'bar shift' option.
+- bar width option is now evaluated when needed.
+- Added documentation for plot handler library changes and for tikz-plot
+ interfaces.
+- Modified pgf manual macros: codeexamples section now employs pgfkeys,
+ xkeyval no longer required. Introduced style 'every codeexample' to
+ maintain compatibility and allow customization for users.
+- Added missing documentation of moveto-decoration.
+- Changed the processing of \pgflsystemstep. Now a TeX
+ dimension, it permits a symbol to shorten the step.
+- Added Lindemayer system drawing library.
+- Renamed the ranomization keys for the step and angle.
+- Updated the L-system docs.
+- Added documentation of oo-subsystem.
+- Started documentation of data visualization-subsystem.
+- Fixed hyperlink problem in dvipdfm(x)/xetex.
+- Fixed typos in Lindemayer system doc.
+- Added \pgfmathfloatadd, \pgfmathfloatsubtract and
+ \pgfmathfloatmultiplyfixed based on pgf's normal math parser
+- Added tests for float arithmetics
+- Added \pgfmathfloattoextentedprecision for 8-digit mantisse precision
+- Added documentation for these methods
+- Added basic layer input stream methods to set zero levels for [xy]comb/[xy]bar;
+ allows to start bars at different offsets than x=0 / y=0.
+- Added documentation for zero level streams.
+- Added "path picture" option, mostly for the implementation
+ of the corrected mindmap connecting bars.
+- Fixed buggy code of mindmap connect bars: Shading angles
+ where sometimes wrong and shading was sometimes at the wrong
+ position.
+- Completely rewrote management of pdf resources. This affects
+ pdftex, dvipdfm, dvipdfmx and xetex backends and all front
+ ends. They should now all work together in harmony, as far
+ as this is supported by them.
+- Completely rewrote driver detection in plain and context
+ mode.
+- dvipdfmx and xetex now use \special{pdf:literal direct},
+ which can *considerably* reduce file sizes (up to a factor
+ of 2).
+- Fixed compatability issue with old calc code.
+- documented '.lasttry' key handler
+- introduced documentation for key filtering routines (as \input section
+ in pgfmanual-en-pgfkeys.tex). Main section of pgfkeys not really updated
+ yet; I only removed the 'family limitation' item in the introduction.
+- Multiple fixes for signal shape.
+- added \pgfplotbarwidth and docs
+- used \pgfmathparse to assign \pgfsetplotbarwidth
+- added 'const plot mark right' to plot handler library to complete the
+ different variants of left/right connected/jump handlers.
+- Fixed parser for expressions that begin and end with braces.
+- Added \pgfmathapproxequalto operation and documentation below
+ \pgfmathequalto
+- Added some user-interface methods to floating point arithmetics
+- Added options
+ /pgf/number format/set decimal separator
+ /pgf/number format/set thousands separator
+ /pgf/number format/skip 0.
+- Added documentation for floating point arithmetics
+- Added documentation for number printing
+- Added PGF plot handlers to plot handler library:
+ - \pgfplothandlerxbar
+ - \pgfplothandlerybar
+ with parameter \pgfsetplotbarwidth{} and
+ - \pgfplothandlerconstantlineto
+ - \pgfplothandlerjumpmarkleft
+ - \pgfplothandlerjumpmarkright
+- Added Tikz-Plot handlers
+ - /tikz/xbar
+ - /tikz/ybar
+ with option '/tikz/bar width' and
+ - /tikz/const plot
+ - /tikz/jump mark left
+ - /tikz/jump mark right
+- Added documentation for new plot handlers to Tikz- and plot handler
+ section in manual
+- Documented changed double line handling.
+- Made some arrow tips work with double lines.
+- Added (not yet documented) "inner lines", which move the
+ double line mechanism from tikz to the basic layer. This
+ allows the definition of special arrow tips for double lines.
+- Added (not yet documented) new arrow tip "implies" using
+ this mechanism.
+- New version of rectangle split shape. Now supports horizontal
+ as well as vertical spliting. Also supports up to 20 parts.
+- Added pgfkeysfiltered.code.tex which provides key filtering
+ and provides key-selection utilities like xkeyvals families
+- changed pgfkeys.code.tex to '\input' pgfkeysfiltered.code.tex
+- Added \tikzaddtikzonlycommandshortcutlet and
+ \tikzaddtikzonlycommandshortcutdef to install shortcut commands at the
+ beginning of tikzpicture.
+- pgfkeys.code.tex: fixed incompatibility .try with .is choice
+- Fixed patterns in dvips mode (were broken).
+- Switched to everyshi in latex mode to hack into
+ \shipout. Wrote direct code to hack into \shipout in plain
+ mode. Hacking into \shipout in Context is still unclear.
+- Added space arrow.
+- Reimplemented parsing of operands.
+- Added cirlce solidus shape by Manuel Lacruz.
+- `curve control points` decoration no longer exists. It is
+ replaced by the `show path construction` decoration.
+- added code + docs for defining changable patterns.
+- Parser altered to access \pgfmathfloatparsenumber when
+ \ifpgfmathfloat is true (old interface to \pgfmathfloat deleted).
+- Added generic/pgf/math/pgfmathfloat.code.tex
+- Modified pgfmath.code.tex to include pgfmathfloat.code.tex
+- Added generic/pgf/testsuite/mathtest/pgfmathtestsuite.tex [dvipdfm/pdflatex]
+ which provides testing for pgfmathfloat.code.tex
+- Fixed minimum width handling in rounded rectangle shape.
+- Added key for rectangle split to ignore empty parts.
+- Extended \pgfshadecolortorgb to define macros for the
+ individual color components.
+- Added `curve control points` decoration for drawing
+ curve controls. NB: names/keys may change.
+- Fix for (some) “hidden” bugs: `Missing character:
+ There is no <char> in font nullfont!`. This is usually
+ only seen in log file. Fixed for star, circular sector
+ and math macros.
+- Fixed documentation "placment" replaced by "positioning"
+- Fixed ConTeXt page resource problem. (ConTeXt support is
+ still not as smooth as support of other formats)
+- Checked in some data visualization stuff, without any
+ documentation. Everything still likely to change
+ completely.
+- Moved module management to pgfutil.
+- Added support for simple oo-programming, not documented.
+- Fixed bug in pgfkeysaddvalue.
+- Fixed bug of stack leak in function shadings in postscript.
+- Fixed missing image inclusion documentation.
+- Fixed atan bug in documentation example.
+- Fixed missing dependency of chains--positioning library
+- Fixed missing dependency of mindmap--decorations library
+
+### Contributors
+
+- Christian Feuersaenger
+- Jin-Hwan Cho
+- Mark Wibrow
+
+## [2.00] - 2008-02-20 Till Tantau
+
+### Changed
+
+- Fixed "initial"/"accepting" distance bug.
+- Fixed wrong intersection computation bug.
+- Added "local bounding box" option for Fabien...
+- Finished chains and chain tutorial.
+- Fixed height of rounded rectangle shape.
+- Added "auto end on length" and "auto corner on length"
+ options to decorations.
+- Added "if input segment is closepath" option to
+ decorations.
+- Renamed "subpath" in decoration code to "inputsegment". In
+ the pdf-specification (and in the rest of the pgf manual) a
+ path is made up of subpath, which are started by movetos,
+ and these in turn are made up of segments. In decorations,
+ segments used to be called subpaths, which was too
+ confusing...
+- More renaming in chains, but its stabilizing now.
+- Started a tutorial on chains.
+- Moved chain part inside "positioning" into "chains"
+ library.
+- Renamed things in the chains library, yet again and added
+ branches.
+- Fixed bug with "xyz of" placements.
+- Renamed "placements" library to "positioning".
+- Renamed and changed all chain commands.
+- Added scopes library.
+- Renamed cap and join to line cap and line join (but old ones
+ are still available).
+- Patched Makefiles according to suggestion by Hans Meine.
+- Fixed bug: duplicate fading name in pgflibraryfadings.
+- Fixed bug: wrong size of functional shading in dvips.
+- Fixed bud: documentation a4paper setting.
+- Fixed bug: Manual now compiles with tex4ht once more.
+- Fixed bug: Manual now is hyperlinked also for dvipdfm.
+- Fixed bug: wrong size of all shadings in svg code.
+- Slight change in placement lib, default chain now has a
+ name.
+- Removed internal asin tables as asin is now calculated from
+ acos tables.
+- Misc. updates for shapes docs.
+- Changed fit library, so that nodes are now "completely"
+ fitted.
+- Changed tutorial so that fit library is now used.
+- Added placement library and documentation.
+- Fixes in snake compatibility code.
+- Added dvipdfmx support (identical to dvipdfm).
+- Fixed missing braces and color stack problem in
+ shapes.logic.IEC.
+- Patched (and hopefully fixed) hyperref support.
+- Made matrix inversion more precise.
+- Added tutorial for geometric constructions.
+- Fixed partway and intersection computations.
+- Added line to circle intersection.
+- Added through library (still very simple...).
+- Added computation of intersection of circles and tangent to
+ a circle.
+- Updated isosceles triangle shape. Positioning of node
+ contents improved. Added key so minimum width and height
+ can be applied independently
+- Fix for trapezium shape for minimum height. This fix may
+ “break” exisiting code by making any trapezium enlarged using
+ minimum height to appear slightly wider than before. But...
+- Added keys for trapezium so that minimum width and height
+ can be applied independently, or to just the `body` of the
+ trapezium.
+- Reimplemented shape `tape`. Anchors should behave a bit
+ better now.
+- Fixed problem with pin a relative coordinates.
+- Added `logic gate IEC symbol color` key to change color
+ for all symbols simultaneously.
+- Fix for loading US and IEC shape library separately.
+- Misc. updates for decoration docs.
+- Modified calc library. Working on documentation.
+- Added calc library and ($...$) notation for coordinates.
+- Reorganised logic shapes. Now two libraries:
+ shapes.gates.logic.US (for “American” gates) and
+ shapes.gates.logic.IEC (for rectangular gates).
+ Gates are now named `and gate US` or `and gate IEC` etc.
+ TikZ key `use US style logic gates` and `use IEC style
+ logic gates` set up styles so that (e.g.) `and gate`
+ becomes a synonym for `shape=and gate US`. See docs for
+ details.
+- Added decorations.markings.
+- Fixed pgfpatharc: Fractional angles are now handled
+ correctly.
+- Fixed incompatability with bm package: Changed hack to
+ \@@end to \AtEndDocument.
+- Changed things in the math engine to speed up things: First,
+ \pgfmath@returnone now uses simpler and faster code. Second,
+ some marshals in the internal math commands like
+ \pgfmathadd@ have been removed. This makes it necessary that
+ the second operand in a call to an internal math macro no
+ longer uses \pgf@x or \pgf@xa and I fixed the 3 places where
+ this was the case.
+- Added footprint decoration and merged Marks footprints.
+- Added buffering to the subpath mechanism. This speeds up
+ constructions of very long paths by a factor of 10 or more.
+- Fixed missing declaration of \iftikz@decoratepath in
+ tikz.code.tex.
+- Added logic shapes library. Includes AND gate, NAND gate,
+ OR gate, NOR gate, XOR gate, XNOR gate and NOT gate.
+- Fooled around with title page.
+- Changed TikZ path scoping rules: Scopes no longer affect the
+ last point on a path. This was a nuiseance before and became
+ a real problem with decorations.
+- Finished my move from snakes to decorations. Also finished
+ documentation.
+ We are now ready for a new release!
+- Removed \externalcode command for decoration states as
+ persistent pre/postcomputation stuff does a similar job.
+- Added \externalcode command for decoration states. Allows
+ code to be executed outside the TeX-group the state code
+ is executed in.
+- Split decoration lib into several libs.
+- Renamed lineto decoration to curveto decoration.
+- Renamed many keys of decorations and snakes to shorter
+ names.
+- Changed the tikz setting of decoration options.
+- No documentation yet.
+- Started merging snakes and decorations. Not yet finished.
+- (Partly) rewrote the tikz support for decorations. There is
+ now a "decorate" path command:
+ \draw ... decorate [decoration=zigzag] { (0,0) -- (1,2) };
+ This yields a much cleaner interface.
+- There is also a decorate=true/false option that causes the
+ whole path to be decorated.
+- Decorated path can now contain nodes.
+- Node paths can also be decorated now.
+- Fixed missing \pgftransformreset inside decoration
+ environment.
+- Changed the decoration documentation a bit. Still not quite
+ perfect...
+- Restructured the basic layer. There is a central core (which
+ got slightly larger) and "modules", which can be included
+ using \usepgfmodule. All the pgfbaseXXX files are now
+ obsolete and only included for the old ones for
+ compatibility.
+ The {pgf} package no longer includes the modules "pattern",
+ "snakes" and "decorations" by default. However, these
+ modules are loaded by their respective libraries, so,
+ normally, no one will notice.
+- Fix for minimum size in ellipse split shape.
+- Added decorations documentation.
+- Coordinates like (2,3cm) are now allowed. Has the same
+ effect as ([shift={(2,0)}]0pt,3cm), which is what everybody
+ would expect.
+- Moved tikz hacks inside tikzlibrarydecorations into
+ tikz.code.tex itself.
+- Fix for save stack overflow in decorations.
+- Renamed \pgfdecorate \endpgfdecorate, now \pgfdecoration
+ \endpgfdecoration. Makes it more consistent with...
+- Meta decorations! Automata that decorate the path with
+ decoration automata! Increased fancyness! Docs soon.
+- Removed a bunch of keys from \tikzlibrarydecorations as
+ not really necessary.
+- Changed shadow lib once more and added it to CVS.
+- Added decorations files. Docs to follow soon(ish).
+- Fix for `star point ratio` and `star point height`
+ keys in star shape.
+- Added copy shadow.
+- Added random steps snake.
+- Added shadow library, removed shadow shapes (no longer
+ needed).
+- Added preaction and postaction options (very useful).
+- Added transform canvas option.
+- Added scale around option.
+- Moved tikz.code.tex to tikz/tikz.code.tex
+- Moved .../libraries/pgflibrarytikzXXXX.code.tex to
+ .../frontendlayer/tikz/libraries/tikzlibraryXXXX.code.tex.
+- Fixed missing example bbs for dvipdfm.
+- Fixed buggy swirl shading.
+- Finished documentation switch from \itemoption to {key}.
+- Changed TikZ fading options. More consistent and easier to use,
+ now.
+- Added `ellipse split` shape.
+- Fixed spaces problem with external graphics.
+- Added [missing] option to supress children.
+- Reduced number of libs includes by {shapes} to geometric,
+ misc and symbol. Shapes is now more or less deprecated.
+- Added shadowed shapes.
+- Added pgfsys-xetex for native xetex support.
+- Added documentation hint on scoping inside \foreach.
+- Fixed bug [1620194] "tikz library mindmap requires trees"
+- Fixed bug [1787504] "Usage of \@namelet in xxcolor.sty clases with memoir."
+- Fixed bug [1809693] "background rectangle is scaled".
+- Added fadings.
+- Added functional shadings.
+- Fixed bug in double drawing with arrows.
+- Fix for all math functions with two arguments.
+- Fix for tikz when y-coordinate is a function within braces.
+- Fix for distance calculation in shape snake.
+- Added `cloud callout` shape.
+- cloud shape can now use (or ignore) `aspect` key.
+- More key updates/fixes for shapes.
+- Corrected minimum size of a diamond shape (was twice the
+ correct size -- this may break existing code, but that cannot
+ be avoided!).
+- Changed some more documentation from \itemoption to {key}s. Not
+ yet finished.
+- Updated math documentation. Code examples now consistent with
+ the rest of the manual.
+- Fixed hyperref-dvipdfm-problem.
+- Updated cloud shape for minimum size calculations.
+- Reimplemented rounded rectangle. Now supports concave arcs.
+- Removed all stuff for Fancy hyperlinked picture of shapes.
+- \foreach will now allow a macro name to be given as list
+ argument (as in \foreach \x in \mylist {...})
+- Fixed keys problem when .try is used with a comma.
+- Fixed shape snake for drawing to other pictures.
+- Added shapes `arrow box` shape, `rectangle callout` and
+ `ellipse callout`.
+- Fixed dvipdfm problem with hyperref.
+- pgfbasesnakes: changed length calculation and added angle calculation.
+- added `shape snake` to snake library.
+- added cylinder shape to geometric shapes.
+- renamed `bevelled rectangle`. Now called `chamfered rectangle`.
+- renamed pgfsavepgf@process. Now called pgfextract@process.
+- Fixed bug #1803811 gobbling of tokens after \pgfmathaddtocounter.
+- Fixed insertion of spaces after \pgfmath stuff.
+- Fixed bug #1811862.
+- Fix for cot and tan. Now correctly return negative values.
+- Added `...head indent` option for single and doube arrow
+ shapes (allows the arrowheads to look more “fancy”).
+- Updated tikzshapes.geometric and tikzshapes.symbols so
+ the incircle border construction can be used in TikZ
+ if libraries are loaded separately.
+- Misc. fixes and updates for shapes doc.
+- Fixed isosceles triangle, circular sector and circle split
+ for `text width` key.
+- Fixed star, cloud and rectangle shape for using anchors for
+ positioning.
+- New shapes:Rectangle split, rounded rectangle,
+ bevelled rectangle, tape, signal, single arrow and double arrow.
+- Fancy hyperlinked picture of all shapes added to shape lib. doc.
+- Updated math doc.
+- Fix for square root.
+- Fix for parsing negative box dimensions.
+- (Yet another) division version.
+- Added cloud shape.
+- Updated all shapes (and doc.) for pgfkeys.
+- Changed Kite key: Now use (e.g.) '/pgf/kite vertex angles=60 and 70' (see doc.)
+- Added keys /pgf/shape aspect and /pgf/shape aspect inverse, (but \pgfsetshapeaspect
+ and, TikZ option `apsect` are still there for compatability).
+- Updated diamond shape (and doc.) to use keys.
+- “Housekeeping” stuff (moved some macros around).
+- Trapezium shape updated. No longer uses left and right
+ extensions. Uses internal angles instead.
+ - Updated pgfkeys for shapes (not done \pgfsetshapeaspect for
+ diamond shape)
+ - Added new starburst shape to misc shapes.
+ - Updated all shapes to pgfkeys.
+- Added fitting library.
+ - Fixed parser for expressions beginning with groups
+ preceeded by signs e.g. -(4+3)
+ - This also fixes problem in TikZ when specifiying coordinates
+ contatining groups. Coordinates in the form (1, {(2+3)}) will
+ work even if there are spaces after the comma.
+- Started to use new pgfkeys also in pgf. In particular,
+ commands like \pgfsetshape... are now replaced by keys.
+ (Not yet finished.)
+- Added new geometric shape: `circular sector`.
+- Updated pgfbaseshapes.code.tex for saved macro support.
+- Added overlay functionality to \node.
+- Added pgfkeys and its documentation.
+- Updated all “new” geometric shapes: polygon, star, trapezium,
+ semicircle, isosceles triangle, kite, dart.
+- `isosceles triangle` and `simple isosceles triangle` combined
+ into one shape.
+- more accurate anchor positioning in polygon and star shapes.
+- Added `shape border uses incircle` option for supporting shapes.
+- Added `shape border rotate` option for supporting shapes.
+- Added support for sec, cosec and cot.
+- Fixed missing compatibility \pgfsincos
+- Fixed wrong \pgfmathsincos
+- Added semicircle shape.
+- Updated documentation for all new shapes.
+- Added support for savedmacros in \pgfdeclareshape.
+- Added trapezium shape.
+- Added support for “legacy” calc code (\real, \minof, \maxof, \ratio).
+- Fixed 'public' sqrt macro in \pgfmathoperations.code.tex
+- Added isosceles triangle shape: uses incircle, but supports arbitrary
+ rotation of border.
+- Added simple isosceles triangle shape: much tighter fit of node
+ contents, but restricted rotation of border.
+- Fixed text width problem in matrix of nodes.
+
+### Contributors
+
+- Mark Wibrow
+
+## [1.18] - 2007-01-18 Till Tantau
+
+- Added regular polygon and star shapes (by Mark Wibrow).
+- Added graphic externalization commands.
+- Added barycentric coordinate system.
+- Added direct TikZ plotting of function based on math engine.
+- Added math documentation into main documentation.
+- Added Mark Wibrow's math library.
+- Added calendar support.
+- Added matrix stuff.
+- Added automatic driver selection for xetex.
+- Added "growth parent anchor" option.
+- Fixed superfluous spaces in quick math parse code
+- Fixed superfluous \newboxes in math and image code
+- Fixed mth parser to recognize \wd\mybox.
+- Fixed wrong \pgfmathsetrandomseed
+- Fixed wrong \pgfmathradians@
+- Fixed problems with long mantissa and plain tex math code.
+- Fixed things so that \setlength works in pictures, once
+ more.
+- Fixed selectfont problem in pdfsys-dvipdfm.def
+- Fixed problem with lost lastx/lasty in foreach in TikZ.
+- Fixed snake+rectangle+transform problem.
+- Fixed rectangle+rounded corner problem.
+- Fixed postscrip eofill1 problem.
+- Fixed amsmath/pgf clash because of wrong definition of \:
+- Fixed size of hyperlinks inside nodes.
+- Fixed ConTeXt problem in pgfbaseplot.
+- Fixed .aux problems in plain and ConTeXt mode. Using .pgf as
+ extension now.
+
+## [1.10] - 2006-10-26 Till Tantau
+
+- Renamed \pgf@sys@pdf@mark to \pgfsyspdfmark.
+- Fixed the ConTeXt support so that it is usable (which is wasn't).
+
+## [1.09] - 2006-10-11 Till Tantau
+
+- Added \usepgflibrary and \usetikzlibrary to simplify adding
+ new libraries.
+- Added native ConTeXt support in the form of module
+ wrappers.
+- Added patterns.
+- Added crosses snake.
+- Added to and edge path operations.
+- Added to path library. In particular, this gives decent
+ curved paths.
+- Added tikz automata library.
+- Added tikz er diagram library.
+- Added tikz Petri net library.
+- Added tikz mindmap library.
+- Added access to nodes in other pictures (!).
+- Added extended baseline setting.
+- Added functionality to add new coordinate systems.
+- Added polar xy coordinate system.
+- Added diamond shape (!).
+- Added plot mark phase, repeat and indices.
+- Added text height and text depth options.
+- Added label and pin options.
+- Added automatic node placement (!).
+- Added pgfsys-dvi.def for pure dvi mode. Supports only
+ black and white drawing (not documented and not really usable).
+- Added 3d library (not documented and not really usable).
+- Cleared up license chaos.
+- Reorganized library documentation.
+- Removed pgflibraryautomata, use pgflibrarytikzautomata instead.
+- Fixed tree level option bug.
+- Fixed missing options for coordinates.
+- Fixed bug in TikZ parabola code.
+- Fixed bug in TikZ snake cycle code.
+- Fixed bug with empty list in pgffor
+- Fixed bug in code for insertion of dvips header specials.
+- Fixed bug in shading code (wrong bigpoint correction).
+- Fixed bug #1472666.
+- Fixed bug #1473255.
+- Fixed bug #1526175.
+- Fixed bug #1542512.
+- Fixed bug in TikZ transformation code for nested pictures.
+- Fixed patch #1443606.
+- Fixed path #1526178.
+
+## [1.01] - 2005-11-16 Till Tantau
+
+- Added textures support.
+- Added text opacity option.
+- Fixed bug in pgfbasesnakes.code.tex causing lot's of
+ 'missing = in nullfont' message in log file.
+- Fixed bug that made plain tex mode unusable.
+- Fixed missing pgfsys-vtex.def in FILES.
+- Fixed wrong box placements in compatibility mode.
+- Fixed SVG support to create legal xml.
+- Moved documentation to doc/generic/pgf.
+
+## [1.00] - 2005-10-23 Till Tantau
+
+- There have not been any real changes since 0.99.
+
+## [0.99] - 2005-10-11 Till Tantau
+
+- Added vtex support (finally!).
+- Added multi part mechanism to nodes.
+- Added very simple pgflibraryautomata.
+- Changed coordinate shape such that it now never produces a
+ text label.
+- Renamed \pgfshapebox to \pgfnodeparttextbox (made necessary
+ by the node part mechanism).
+
+## [0.98] - 2005-09-20 Till Tantau
+
+- Added transparency to PGF (quite nice...).
+- Added foreach option to child path operation (also nice...).
+- Fixed problem with \\ in centered text.
+- Fixed problem with hyperlinks in nodes.
+- Fixed wrong arrows in trees.
+
+## [0.97] - 2005-09-08 Till Tantau
+
+- Reorganised directory structure of documentation.
+- Added tree mechanism.
+- Added snake mechanism.
+- Added layer mechanism.
+- Added new shapes: cross out, strike out, forbidden sign.
+- Added some more documentation.
+- Added "none" drawing and filling colors.
+- Added pgflibrarytikzbackgrounds.
+- Changed syntax of \pgfqbox.
+- Changed syntax of several \pgfsys@xxxx commands.
+- Added SVG support / a tex4ht backend. (Complicated text
+ inside svg graphics is not supported well, but that's mainly
+ a shortcoming of the svg specification.)
+
+## 0.96 - 2005-07-06 Till Tantau
+
+This is a beta version. Version 1.00 will be the first stable
+version of TikZ/pgf.
+
+- Fixed spacing problem in dvips.
+- Changed syntax of plot and plot marks.
+- Changed syntax of ellipse and elliptical arc options.
+- Fixed baseline bug in tikz.
+- Fixed bug in pgfpages.
+- Introduced "every xxxx" styles, got rid of shape actions option.
+- Added "intersection of" syntax for coordinates.
+- Started revising the documentation.
+- Changed names of some pgfpages commands.
+- Changed syntax of parabola command.
+- Proof read documentation.
+
+## 0.95 - 2005-06-12 Till Tantau
+
+This is an *alpha* prerelease version. Syntax changes
+are still possible before the beta version. Version 1.00
+will be the stable version.
+
+### Changed (this is almost a new program):
+
+- Introduced three layers: system, basic, frontends.
+- Wrote two frontends: TikZ (*most* useful!) and pgfpict2e (a
+ demonstration).
+- Largely rewrote the basic layer.
+- Largely rewrote the system layer.
+- Completely rewrote the documentation.
+- Added two utilities: pgfpages and pgffor.
+- Made macro naming more consistent.
+- Added plain tex support.
+- Added dvipdfm support.
+- Restructured directory structure.
+- Zillions of small bugfixes.
+
+## 0.65 - 2004-10-20 Till Tantau
+
+- Fixed bug in pgfshade.sty that arises in conjunction with
+ calc.sty and latex+dvips.
+
+## 0.64 - 2004-10-08 Till Tantau
+
+- Fixed missing depth of \pgfnodebox.
+- Fixed bug that caused infinite stack loop with pictures inside
+ nodes.
+
+## 0.63 - 2004-07-08 Till Tantau
+
+- Added \pgfextractx, \pgfextracty, \pgfcorner.
+- Added some documentation on masks and images.
+- Fixed a somewhat obscure bug having to do with the modification
+ of \spaceskip.
+- \pgfex and \pgfem no loner needed. Use 1ex etc. once more.
+- calc.sty is now supported.
+
+## 0.62 - 2004-07-06 Till Tantau
+
+- Fixed problem in xxcolor with option "gray" and xcolor.
+- Switched to xcolor version 2.00.
+- Added eofill and eofillstroke commands.
+- Added option to shadings, so that they are automatically
+ recalculated upon color changes.
+- Changed names of example images to start with pgf.
+
+## 0.61 - 2004-04-07 Till Tantau
+
+- Added \pgfex and \pgfem dimensions.
+- Fixed bug that causes pgfshade to fail to work if xcolor
+ is called with option "gray".
+- Fixed PostScript code for radial shadings.
+- xxcolor now works with xcolor 1.10 (and only 1.10).
+
+## 0.60 - 2004-02-18 Till Tantau
+
+- Replaced some commands for the postscript code by shorter
+ versions for smaller file size.
+- Fixed bug in pgfbox command that caused incorrect kerning in
+ postscript output.
+- Fixed bug in pgfsys@defineimage that made page inclusion
+ impossible.
+- Fixed bug in pgfshading that did not reset dash patterns in
+ shadings in the PostScript version.
+- Spaces are now allowed inside the pgfpicture environment.
+- Added \pgfgrid command.
+
+## 0.50 - 2004-01-13 Till Tantau
+
+- Switched to version 1.06 of xcolor.
+- Core pgf no longer relies on xxcolor.
+- The syntax of the mechanism for choosing alternate images and
+ shadings is more flexible now. The syntax has been changed
+ (mainly, you now have to have a dot between the original name and
+ the alternate extension).
+- Some xxcolor commands have been removed.
+
+## 0.43 - 2003-12-02 Till Tantau
+
+- Fixed \normalcolor, so that it works also in preamble.
+
+## 0.42 - 2003-11-20 Till Tantau
+
+- Documented masks.
+- Fixed bug in pgf.sty for nested pictures.
+
+## 0.41 - 2003-11-18 Till Tantau
+
+- Added masks (not yet documented).
+
+## 0.40 - 2003-11-12 Till Tantau
+
+- Changed syntax of \pgfdeclareimage. Uses key=value scheme
+ now. All parameters may now be omitted.
+- Added \pgfimage command.
+- Option for selecting a specific page from an image file.
+- Fixed bug in xxcolor.sty having to do with \@ifempty command.
+- Reworked the formatting of the user's guide.
+
+## 0.34 - 2003-10-29 Till Tantau
+
+- Shadings now work together with color mix-ins.
+- Shadings can now take color names as parameters.
+
+## 0.33 - 2003-10-24 Till Tantau
+
+- Fixed problem with missing \leavevmode in \pgfuseimage.
+- Reworked code for image inclusion.
+- "Draft" option is now supported. Supresses reading of images.
+- Added xxcolor package.
+- pgfpictures will now inherit the color from their surroundings.
+
+## 0.32 - 2003-10-20 Till Tantau
+
+- Updated installation procedure information.
+
+## 0.31 - 2003-09-18 Till Tantau
+
+- One parameter for \pgfdeclareimage may now be omitted. It will
+ be computed automatically.
+
+## 0.30 - 2003-08-21 Till Tantau
+
+- Created ChangeLog
+- Added pgfshade.sty
+
+[3.1.10]: https://github.com/pgf-tikz/pgf/compare/3.1.9a...3.1.10
+[3.1.9a]: https://github.com/pgf-tikz/pgf/compare/3.1.9...3.1.9a
+[3.1.9]: https://github.com/pgf-tikz/pgf/compare/3.1.8b...3.1.9
+[3.1.8b]: https://github.com/pgf-tikz/pgf/compare/3.1.8a...3.1.8b
+[3.1.8a]: https://github.com/pgf-tikz/pgf/compare/3.1.8...3.1.8a
+[3.1.8]: https://github.com/pgf-tikz/pgf/compare/3.1.7a...3.1.8
+[3.1.7a]: https://github.com/pgf-tikz/pgf/compare/3.1.7...3.1.7a
+[3.1.7]: https://github.com/pgf-tikz/pgf/compare/3.1.6a...3.1.7
+[3.1.6a]: https://github.com/pgf-tikz/pgf/compare/3.1.6...3.1.6a
+[3.1.6]: https://github.com/pgf-tikz/pgf/compare/3.1.5b...3.1.6
+[3.1.5b]: https://github.com/pgf-tikz/pgf/compare/3.1.5a...3.1.5b
+[3.1.5a]: https://github.com/pgf-tikz/pgf/compare/3.1.5...3.1.5a
+[3.1.5]: https://github.com/pgf-tikz/pgf/compare/3.1.4b...3.1.5
+[3.1.4b]: https://github.com/pgf-tikz/pgf/compare/3.1.4a...3.1.4b
+[3.1.4a]: https://github.com/pgf-tikz/pgf/compare/3.1.4...3.1.4a
+[3.1.4]: https://github.com/pgf-tikz/pgf/compare/3.1.3...3.1.4
+[3.1.3]: https://github.com/pgf-tikz/pgf/compare/3.1.2...3.1.3
+[3.1.2]: https://github.com/pgf-tikz/pgf/compare/3.1.1...3.1.2
+[3.1.1]: https://github.com/pgf-tikz/pgf/compare/3.1...3.1.1
+[3.1]: https://github.com/pgf-tikz/pgf/compare/3.0.1...3.1
+[3.0.1]: https://github.com/pgf-tikz/pgf/compare/version-3-0-0...3.0.1
+[3.0.0]: https://github.com/pgf-tikz/pgf/compare/2.10...version-3-0-0
+[2.10]: https://github.com/pgf-tikz/pgf/compare/version-2-00...2.10
+[2.00]: https://github.com/pgf-tikz/pgf/compare/version-1-18...version-2-00
+[1.18]: https://github.com/pgf-tikz/pgf/compare/version-1-10...version-1-18
+[1.10]: https://github.com/pgf-tikz/pgf/compare/version-1-09...version-1-10
+[1.09]: https://github.com/pgf-tikz/pgf/compare/version-1-01...version-1-09
+[1.01]: https://github.com/pgf-tikz/pgf/compare/version-1-00...version-1-01
+[1.00]: https://github.com/pgf-tikz/pgf/compare/version-0-99...version-1-00
+[0.99]: https://github.com/pgf-tikz/pgf/compare/version-0-98...version-0-99
+[0.98]: https://github.com/pgf-tikz/pgf/compare/tag-version-0-97...version-0-98
+[0.97]: https://github.com/pgf-tikz/pgf/releases/tag/tag-version-0-97