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+# Changelog
+All notable changes to the `l3backend` bundle will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+this project uses date-based 'snapshot' version identifiers.
+
+## [Unreleased]
+
+## [2024-04-11]
+
+### Added
+- Support for 'raw' PDF object IDs
+
+### Changed
+- Update PDF object management code
+
+## [2024-03-14]
+
+### Removed
+- Range guard for opacity
+
+### Fixed
+- Initiation of opacity data (see \#1472)
+- ExtGState setup for stroking opacity (issue \#1472)
+- Inconsistent behavior of opacity functions w/o `pdfmanagement`
+ (issue \#1473)
+- Redundant braces in opacity backend for dvisvgm
+- Interaction of scope with box insertion with `dvips` (see \#1504)
+
+## [2024-02-20]
+
+### Fixed
+- Naming of a variable in the `draw` code
+
+## [2024-01-04]
+
+### Changed
+- Documentation tweaks
+
+## [2023-11-09]
+
+### Changed
+- Changed `luaotfload` integration to allow coexistance with (x)color.
+
+## [2023-11-04]
+
+### Fixed
+- Interaction with `luaotfload` transparency colorstacks
+
+## [2023-10-23]
+
+### Changed
+- Update minimal `expl3` version required
+
+## [2023-10-10]
+
+### Changed
+- Track `expl3` changes
+
+## [2023-04-19]
+
+### Changed
+- Pass additional attributes when loading graphics in PDF mode
+
+### Fixed
+- Remove a stray `>` from graphics inclusion code for `dvipdfmx`
+
+## [2023-03-30]
+
+### Changed
+- Integrate `l3color` and `l3opacity` with `luaotfload` to ensure that
+ opacity specifications don't conflict
+
+## [2023-01-16]
+
+### Changed
+- Adjust internal scope of a PDF function
+
+## [2022-10-26]
+
+### Changed
+- Avoid setting media box if `\mag` is non-standard
+
+## [2022-09-28]
+
+### Changed
+- Add support for media box setting
+
+## [2022-08-30]
+
+### Added
+- Support for new approach to writing PDF objects
+
+## [2022-08-23]
+
+### Changed
+- Approach to setting current color data from LaTeX2e
+
+## [2022-08-05]
+
+### Changed
+- Add no-op backend functions for annotations with `dvisvgm`
+
+## [2022-07-01]
+
+#### Fixed
+- Do not include PDF file to count pages on pdfTeX
+- Opacity creation with `dvipdfmx`/XeTeX (issue [\#1106](https://github.com/latex3/latex3/issues/1106))
+- Reset opacity when no stack is available at the backend (issue [\#1107](https://github.com/latex3/latex3/issues/1107))
+
+## [2022-04-20]
+
+### Changed
+- Adjust `(x)dvipdfmx` backend approach to color following issues with
+ multiple color stacks in `xetex.def`
+- Move some functions to `l3color`
+
+## [2022-04-14]
+
+### Added
+- Support for SVG graphic inclusion by `dvisvgm`
+
+### Fixed
+- `\color_ensure_current:` backend with DVI-based routes (issue [\#1085](https://github.com/latex3/latex3/issues/1085))
+
+## [2022-04-10]
+
+### Added
+- Support for graphics (PDF) page count extraction
+
+### Fixed
+- Setup for graphics extension searching
+- Various internal issues in graphics inclusion
+- Some missing functions for `dvisvgm` color support added
+
+### Removed
+- Support for pre-2020-11-11 `dvipdfmx`
+
+## [2022-02-07]
+
+### Fixed
+- Use of color stack int in scope end for `(x)dvipdfmx`
+
+## [2022-01-12]
+
+### Changed
+- Move some functions to `l3color`
+
+## [2021-12-14]
+
+### Fixed
+- Scoping issues for `dvisvgm`
+- Some incorrect functions in `l3draw` backend for `dvisvgm`
+
+## [2021-10-17]
+
+### Changed
+- Better DeviceN support
+
+## [2021-10-12]
+
+### Fixed
+- Issues with creating DeviceN color spaces
+
+## [2021-08-04]
+
+### Changed
+- Only use `pdfmanagement` module if active
+
+## [2021-07-12]
+
+### Fixed
+- GoTo link formation for Distiller-based workflows (issue [\#957](https://github.com/latex3/latex3/issues/957))
+- Support transparency with Distiller
+
+## [2021-05-07]
+
+### Changed
+- `\pdf_version_gset:n` in `dvips` now sets `\pdf_version_minor:` and
+ `\pdf_version_major:`. This doesn't set the PDF version but allows to test
+ which version the user intents to create.
+
+## [2021-03-18]
+
+### Fixed
+- Maintain stack color correctly with `(x)dvipdfmx`
+
+## [2021-03-02]
+
+### Changed
+- Drop 'correction' for link placement in `(x)dvidpfmx`: no longer required
+- Define `\main@pdfcolorstack` for `(x)dvipdfmx` if it does not exist
+
+### Fixed
+- Initialisation of color stacks for `(x)dvipdfmx`
+
+## [2021-02-18]
+
+### Changed
+- Update tracking of PDF management functions
+
+### Fixed
+- Opacity support for pdfTeX/LuaTeX
+
+## [2021-02-06]
+
+### Changed
+- Use new (internal) interface for kerns
+
+## [2021-01-29]
+
+### Added
+- Basic opacity support
+
+### Changed
+- Use color stack for fill color, and for stroke color if possible
+
+### Fixed
+- Implementation of `filldraw` for `dvips`
+
+## [2021-01-09]
+
+### Added
+- Support for referencing last link with `(x)dvipdfmx` (requires an up-to-date
+ backend)
+
+### Changed
+- Implementation of color wtih (x)dvipdfmx (requires an up-to-date
+ backend)
+
+## [2020-09-24]
+
+### Fixed
+- Documented source as PDF
+
+## [2020-09-11]
+
+### Added
+- Support for CIELAB separations with `dvips`
+
+### Fixed
+- Some PDF object functions
+- Separation color selection for `dvipdfmx`/XeTeX
+- Logic for some aspects of CIELAB Separation color
+
+## [2020-09-01]
+
+### Changed
+- Improved support for Separation colors
+- Updated approach to `dvipdfmx`/XeTeX color support
+- Split `pdfmode` driver into pdfTeX- and LuaTeX-specific files
+- Renamed `xdvipdfmx` backend files to `xetex`
+
+## [2020-08-07]
+
+### Changed
+- Color selection implementation
+- Improved support for Separation colors
+
+## [2020-06-29]
+
+### Fixed
+- Loading with `dvisvgm`
+
+## [2020-06-23]
+
+### Changed
+- Improved color support for drawings with `dvisvgm`
+
+### Fixed
+- Loading with `dvisvgm`
+
+## [2020-06-18]
+
+### Changed
+- Use `scn` operator for separations
+- Internal color model
+- Internal performance enhancements
+
+## [2020-06-03]
+
+### Fixed
+- Unneeded `[nobreak]` in `dvips` driver (issue [\#709](https://github.com/latex3/latex3/issues/709))
+- `\__pdf_backend_object_write_fstream:nn` with `dvips` backend (issue [\#710](https://github.com/latex3/latex3/issues/710))
+- Array writing in `dvips` mode
+
+## [2020-05-05]
+
+### Added
+- `\__pdf_backend_pageobject_ref:n`
+
+### Changed
+- Extend PDF compression control to `dvips`
+
+## [2020-03-12]
+
+### Fixed
+- Creation of PDF annotations with `dvips` backend
+
+## [2020-02-23]
+
+### Fixed
+- Mismatch between release tag and CTAN version
+
+## [2020-02-21]
+
+### Added
+- Support for suppressing backend headers (see matching change in
+ `l3kernel`)
+
+## [2020-02-03]
+
+### Fixed
+- Corrected release string information
+
+## [2019-11-25]
+
+### Changed
+- Move dvips header material to `.pro` file
+
+## [2019-10-11]
+
+### Changed
+- Improved functionality in generic mode
+
+## [2019-09-05]
+
+### Added
+- Support for EPS and PDF files with `dvisvgm` backend
+
+### Fixed
+- Some primitive use in the `dvips` backend
+
+## [2019-08-25]
+
+### Fixed
+- Setting for PDF version in `dvipdfmx` route
+- Support for PDF objects with XeTeX
+
+## [2019-07-01]
+
+### Added
+- Driver support for anonymous objects
+
+### Changed
+- Moved backend code to separate release module `l3backend`
+- Include `l3backend` in file names
+- Moved backend code to internal for each 'parent' module
+
+[Unreleased]: https://github.com/latex3/latex3/compare/2024-04-11...HEAD
+[2024-04-11]: https://github.com/latex3/latex3/compare/2024-03-14...2024-04-11
+[2024-03-14]: https://github.com/latex3/latex3/compare/2024-02-20...2024-03-14
+[2024-02-20]: https://github.com/latex3/latex3/compare/2024-01-04...2024-02-20
+[2024-01-04]: https://github.com/latex3/latex3/compare/2023-11-09...2024-01-04
+[2023-11-09]: https://github.com/latex3/latex3/compare/2023-11-04...2023-11-09
+[2023-11-04]: https://github.com/latex3/latex3/compare/2023-10-23...2023-11-04
+[2023-10-23]: https://github.com/latex3/latex3/compare/2023-10-10...2023-10-23
+[2023-10-10]: https://github.com/latex3/latex3/compare/2023-04-19...2023-10-10
+[2023-04-19]: https://github.com/latex3/latex3/compare/2023-03-30...2023-04-19
+[2023-03-30]: https://github.com/latex3/latex3/compare/2023-01-16...2023-03-30
+[2023-01-16]: https://github.com/latex3/latex3/compare/2022-10-26...2023-01-16
+[2022-10-26]: https://github.com/latex3/latex3/compare/2022-09-28...2022-10-26
+[2022-09-28]: https://github.com/latex3/latex3/compare/2022-08-30...2022-09-28
+[2022-08-30]: https://github.com/latex3/latex3/compare/2022-08-23...2022-08-30
+[2022-08-23]: https://github.com/latex3/latex3/compare/2022-08-05...2022-08-23
+[2022-08-05]: https://github.com/latex3/latex3/compare/2022-07-01...2022-08-05
+[2022-07-01]: https://github.com/latex3/latex3/compare/2022-04-20...2022-07-01
+[2022-04-20]: https://github.com/latex3/latex3/compare/2022-04-14...2022-04-20
+[2022-04-14]: https://github.com/latex3/latex3/compare/2022-04-10...2022-04-14
+[2022-04-10]: https://github.com/latex3/latex3/compare/2022-02-07...2022-04-10
+[2022-02-07]: https://github.com/latex3/latex3/compare/2022-01-12...2022-02-07
+[2022-01-12]: https://github.com/latex3/latex3/compare/2021-12-14...2022-01-12
+[2021-12-14]: https://github.com/latex3/latex3/compare/2021-10-17...2021-12-14
+[2021-10-17]: https://github.com/latex3/latex3/compare/2021-10-12...2021-10-17
+[2021-10-12]: https://github.com/latex3/latex3/compare/2021-08-04...2021-10-12
+[2021-08-04]: https://github.com/latex3/latex3/compare/2021-07-12...2021-08-04
+[2021-07-12]: https://github.com/latex3/latex3/compare/2021-05-07...2021-07-12
+[2021-05-07]: https://github.com/latex3/latex3/compare/2021-03-18...2021-05-07
+[2021-03-18]: https://github.com/latex3/latex3/compare/2021-03-02...2021-03-18
+[2021-03-02]: https://github.com/latex3/latex3/compare/2021-02-18...2021-03-02
+[2021-02-18]: https://github.com/latex3/latex3/compare/2021-02-06...2021-02-18
+[2021-02-06]: https://github.com/latex3/latex3/compare/2021-01-29...2021-02-06
+[2021-01-29]: https://github.com/latex3/latex3/compare/2021-01-09...2021-01-29
+[2021-01-09]: https://github.com/latex3/latex3/compare/2020-09-24...2021-01-09
+[2020-09-24]: https://github.com/latex3/latex3/compare/2020-09-11...2020-09-24
+[2020-09-11]: https://github.com/latex3/latex3/compare/2020-09-01...2020-09-11
+[2020-09-01]: https://github.com/latex3/latex3/compare/2020-08-07...2020-09-01
+[2020-08-07]: https://github.com/latex3/latex3/compare/2020-06-29...2020-08-07
+[2020-06-29]: https://github.com/latex3/latex3/compare/2020-06-23...2020-06-29
+[2020-06-23]: https://github.com/latex3/latex3/compare/2020-06-18...2020-06-23
+[2020-06-18]: https://github.com/latex3/latex3/compare/2020-06-03...2020-06-18
+[2020-06-03]: https://github.com/latex3/latex3/compare/2020-05-05...2020-06-03
+[2020-05-05]: https://github.com/latex3/latex3/compare/2020-03-12...2020-05-05
+[2020-03-12]: https://github.com/latex3/latex3/compare/2020-02-23...2020-03-12
+[2020-02-23]: https://github.com/latex3/latex3/compare/2020-02-21...2020-02-23
+[2020-02-21]: https://github.com/latex3/latex3/compare/2020-02-03...2020-02-21
+[2020-02-03]: https://github.com/latex3/latex3/compare/2019-11-25...2020-02-03
+[2019-11-25]: https://github.com/latex3/latex3/compare/2019-10-11...2019-11-25
+[2019-10-11]: https://github.com/latex3/latex3/compare/2019-09-05...2019-10-11
+[2019-09-05]: https://github.com/latex3/latex3/compare/2019-08-25...2019-09-05
+[2019-08-25]: https://github.com/latex3/latex3/compare/2019-07-01...2019-08-25
+[2019-07-01]: https://github.com/latex3/latex3/compare/2019-05-28...2019-07-01