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Julian Offenhäuser c2ad29c85f LibPDF: Implement png predictor decoding for flate filter
For flate and lzw filters, the data can be transformed by this
predictor function to make it compress better. For us this means that
we have to undo this step in order to get the right result.

Although this feature is meant for images, I found at least a few
documents that use it all over the place, making this step very
important.
2022-11-19 15:42:08 +01:00
.github CI: Check out PR merge branch instead of source 2022-11-05 00:20:58 -04:00
AK AK: Return non-const types from Ptr class operators 2022-11-19 14:37:31 +00:00
Base Base: Add more emoji 2022-11-16 21:43:33 +00:00
Documentation Documentation: Give collapsed sections consistent headers 2022-11-03 06:58:19 +00:00
Kernel Kernel+lsirq: Track per-CPU IRQ handler call counts 2022-11-19 15:39:30 +01:00
Meta Meta: Do not hard-code index types for UCD/CLDR/TZDB code generators 2022-11-18 17:00:51 +00:00
Ports Ports: Update fio to version 3.33 2022-11-07 06:46:30 +01:00
Tests LibC+Tests: Simplify getpwuid_r() and getpwnam_r() and add tests 2022-11-19 11:11:13 +01:00
Toolchain Toolchain: Add libxcrypt to serenity.nix 2022-11-13 19:38:14 +00:00
Userland LibPDF: Implement png predictor decoding for flate filter 2022-11-19 15:42:08 +01:00
.clang-format Meta: Update .clang-format to correct qualifier alignment 2022-04-01 21:24:45 +01:00
.clang-tidy Meta: Disable readability-use-anyofallof clang-tidy check 2022-01-09 23:29:57 -08:00
.editorconfig Meta: Add .editorconfig 2022-09-10 17:32:55 +01:00
.gitattributes Repository: Protect port patches from CRLF/LF normalization 2022-01-12 01:08:38 +01:00
.gitignore Meta: Ignore vim's .exrc config 2022-10-06 16:06:50 +01:00
.mailmap Meta: Add a few more e-mail addresses to the .mailmap file 2022-10-16 17:30:53 +02:00
.pre-commit-config.yaml Meta: Add a post-commit commit message linter hook 2021-05-02 16:28:01 +02:00
.prettierignore LibJS: Handle empty named export 2022-09-02 02:07:37 +01:00
.prettierrc Meta: Move prettier config files to the root of the repository 2020-08-24 18:21:33 +02:00
.ycm_extra_conf.py Meta: Make YCM work when the current dir is not the root of the tree 2022-10-30 23:57:25 +01:00
azure-pipelines.yml CI: Disallow test failures on macOS Lagom :^) 2022-01-14 22:39:06 +01:00
CMakeLists.txt Toolchain: Update LLVM to 15.0.3 2022-10-24 15:33:58 +02:00
CONTRIBUTING.md Meta: Add Andrew Kaster to list of project maintainers :^) 2022-10-09 15:16:06 +02:00
LICENSE Meta: Update year range in LICENSE :^) 2022-01-02 18:08:02 +01:00
README.md Meta: Add Timon Kruiper to the contributors list :^) 2022-10-18 15:48:29 +02:00
SECURITY.md Meta: Add a security policy 2022-06-29 03:29:27 +00:00

SerenityOS

Graphical Unix-like operating system for x86 computers.

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About

SerenityOS is a love letter to '90s user interfaces with a custom Unix-like core. It flatters with sincerity by stealing beautiful ideas from various other systems.

Roughly speaking, the goal is a marriage between the aesthetic of late-1990s productivity software and the power-user accessibility of late-2000s *nix. This is a system by us, for us, based on the things we like.

You can watch videos of the system being developed on YouTube:

FAQ: Frequently Asked Questions

Screenshot

Screenshot as of b36968c.png

Features

  • Modern x86 32-bit and 64-bit kernel with pre-emptive multi-threading
  • Browser with JavaScript, WebAssembly, and more (check the spec compliance for JS, CSS, and WASM)
  • Security features (hardware protections, limited userland capabilities, W^X memory, pledge & unveil, (K)ASLR, OOM-resistance, web-content isolation, state-of-the-art TLS algorithms, ...)
  • System services (WindowServer, LoginServer, AudioServer, WebServer, RequestServer, CrashServer, ...) and modern IPC
  • Good POSIX compatibility (LibC, Shell, syscalls, signals, pseudoterminals, filesystem notifications, standard Unix utilities, ...)
  • POSIX-like virtual file systems (/proc, /dev, /sys, /tmp, ...) and ext2 file system
  • Network stack and applications with support for IPv4, TCP, UDP; DNS, HTTP, Gemini, IMAP, NTP
  • Profiling, debugging and other development tools (Kernel-supported profiling, detailed program analysis with software emulation in UserspaceEmulator, CrashReporter, interactive GUI playground, HexEditor, HackStudio IDE for C++ and more)
  • Libraries for everything from cryptography to OpenGL, audio, JavaScript, GUI, playing chess, ...
  • Support for many common and uncommon file formats (PNG, JPEG, GIF, MP3, WAV, FLAC, ZIP, TAR, PDF, QOI, Gemini, ...)
  • Unified style and design philosophy, flexible theming system, custom (bitmap and vector) fonts
  • Games (Solitaire, Minesweeper, 2048, chess, Conway's Game of Life, ...) and demos (CatDog, Starfield, Eyes, mandelbrot set, WidgetGallery, ...)
  • Every-day GUI programs and utilities (Spreadsheet with JavaScript, TextEditor, Terminal, PixelPaint, various multimedia viewers and players, Mail, Assistant, Calculator, ...)

... and all of the above are right in this repository, no extra dependencies, built from-scratch by us :^)

Additionally, there are over two hundred ports of popular open-source software, including games, compilers, Unix tools, multimedia apps and more.

How do I read the documentation?

Man pages are available online at man.serenityos.org. These pages are generated from the Markdown source files in Base/usr/share/man and updated automatically.

When running SerenityOS you can use man for the terminal interface, or help for the GUI.

Code-related documentation can be found in the documentation folder.

How do I build and run this?

See the SerenityOS build instructions. Serenity runs on Linux, macOS (aarch64 might be a challenge), Windows (with WSL2) and many other *Nixes with hardware or software virtualization.

Get in touch and participate!

Join our Discord server: SerenityOS Discord

Before opening an issue, please see the issue policy.

A general guide for contributing can be found in CONTRIBUTING.md.

Authors

And many more! See here for a full contributor list. The people listed above have landed more than 100 commits in the project. :^)

License

SerenityOS is licensed under a 2-clause BSD license.