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Truly independent web browser
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Nico Weber 3a50cadddf Tests/LibGfx: Add a jbig2 file using basic symbol and text segments 
I created this file using `jbig2` (see below for details), but as
far as I can tell `jbig2` does not produce spec-compliant files:

1. It always writes to 0s for the run lengths that specify how
   many symbols to export at the end of a symbol segment

2. It doesn't write any referred-to segments for text segments.
   I think it's supposed to write a referred-to segment that
   mentions the symbol segment the text segment refers to (?)

I locally tweaked `jbig2` to fix these two defects (*), so the image
added in this commit is correct as best I can tell. It opens fine
using `image` and `jbig2`'s decode mode, and via
`Meta/jbig2_to_pdf.py` in Firefox and Chrome. Without my tweaks,
the image decodes fine with `jbig2`, but not with any of the other
three. The image (in a pdf) does _not_ decode in Preview.app,
either with or without my local `jbig2` tweaks.

*: See the PR adding this image for my local diff.

I created the test image file by running this shell script with
`jbig2` tweaked as described above:

    #!/bin/bash
    set -eu

    I=Build/lagom/bin/image
    S=Tests/LibGfx/test-inputs/bmp/bitmap.bmp

    $I "$S" --crop 232,70,120,250  -o mouth.bmp
    $I "$S" --crop 135,100,100,100 -o nose.bmp
    $I "$S" --crop 50,108,30,30    -o top_eye.bmp
    $I "$S" --crop 60,265,30,30    -o bottom_eye.bmp

    # I then manually converted those to 1bpp using Photoshop
    # (Image->Mode->Grayscale, then Image->Mode->Bitmap...,
    # File->Save As..., bmp) since `jbig2` gets confused by non-1bpp
    # bmp files and `image` can't write 1bpp files :/
    #
    # (I tried `convert ${in} -monochrome ${in}-1bpp.bmp` via
    # https://cancerberosgx.github.io/magic/playground/index.html
    # first, but that produced bmp files that neither Preview.app nor
    # `jbig2` could handle.)
    #
    # -HeightClass: Number of height classes
    # -WidthClass: Maximum number of symbols in one height class
    # -Simple means no refinement; the number after is the symbol's ID
    # The 3 numbers afer `-ID` are id, y, x. The `-ID` are sorted by x.
    # -RefCorner 1 means "top left".
    #
    # `jbig2` writes symbol and text segments as specified in the ini
    # file, and then only stores the bits of the input image that aren't
    # already set through symbol and text segments.

    cat << EOF > jbig2-symbol.ini
    -sym -Seg 1
    -sym -file -numClass -HeightClass 3 -WidthClass 2
    -sym -file -numSymbol 4
    -sym -file -Height 250
    -sym -file -Width 120 -Simple 0 mouth-1bpp.bmp
    -sym -file -EndOfHeightClass
    -sym -file -Height 100
    -sym -file -Width 100 -Simple 1 nose-1bpp.bmp
    -sym -file -EndOfHeightClass
    -sym -file -Height 30
    -sym -file -Width 30 -Simple 2 top_eye-1bpp.bmp
    -sym -file -Width 30 -Simple 3 bottom_eye-1bpp.bmp
    -sym -file -EndOfHeightClass
    -sym -Param -Huff_DH 0
    -sym -Param -Huff_DW 0

    -txt -Seg 2
    -txt -Param -numInst 4
        -ID 2 108 50 -ID 3 265 60 -ID 1 100 135 -ID 0 70 232
    -txt -Param -RefCorner 1
    -txt -Param -Xlocation 0
    -txt -Param -Ylocation 0
    -txt -Param -W 399
    -txt -Param -H 400
    EOF

    J=$HOME/Downloads/T-REC-T.88-201808-I\!\!SOFT-ZST-E/Software
    J=$J/JBIG2_SampleSoftware-A20180829/source/jbig2

    $J -i "${S%.bmp}" -f bmp -o symbol -F jb2 -ini jbig2-symbol.ini
2024-03-23 08:18:15 -04:00
.devcontainer Meta: Switch to clang-format-16 as the standard formatter 2023-07-08 10:32:56 +01:00
.github Meta: Add Polar to FUNDING.yml 2024-02-21 07:36:55 +01:00
AK AK: Use else if constexpr in explode_byte() 2024-03-21 14:35:20 -06:00
Base Base: Add Emoji 2024-03-21 21:28:12 +00:00
Documentation Documentation: Update for the removal of SERENITY_SOURCE_DIR requirement 2024-02-26 13:16:27 -07:00
Kernel Kernel/riscv64: Fix typo (CSR::SATP::Mode::{Sv67 => Sv57}) 2024-03-20 10:36:10 -06:00
Ladybird LibWeb+WebContent+Ladybird: Add ability to paste text from clipboard 2024-03-22 15:47:33 -04:00
Meta LibWeb: Ensure enumerated attributes are always limited to known values 2024-03-22 11:29:57 +01:00
Ports Ports: Update rvvm to 0.6 2024-03-23 13:00:44 +01:00
Tests Tests/LibGfx: Add a jbig2 file using basic symbol and text segments 2024-03-23 08:18:15 -04:00
Toolchain Kernel: Add initial basic support for KASAN 2023-12-30 13:57:10 +01:00
Userland LibWeb: Look for labeled control in DOM tree instead of layout tree 2024-03-23 12:46:37 +01:00
.clang-format Meta: Support using clang-format on Objective-C++ files 2023-08-22 21:36:19 -04:00
.clang-tidy Meta: Disable readability-function-cognitive-complexity in clang-tidy 2024-02-05 08:04:24 -07:00
.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: Move .DS_Store rule to the bottom of the .gitignore file 2023-11-14 14:53:37 -05:00
.gn Meta: Automatically generate a compilation database for clangd 2023-11-14 14:29:35 -05:00
.mailmap Everywhere: Update copyrights with my new serenityos.org e-mail :^) 2023-07-15 16:21:29 +02:00
.pre-commit-config.yaml
.prettierignore LibJS: Add DisposableStack{, Prototype, Constructor} 2023-01-23 09:56:50 +00:00
.prettierrc
.ycm_extra_conf.py Meta: Remove i686 references in YCM configuration 2022-12-28 11:53:41 +01:00
azure-pipelines.yml CI: Remove extraneous toolchain job from Azure CI 2022-12-28 15:26:12 -05:00
CMakeLists.txt Meta: Replace run.sh by run.py 2023-12-15 00:11:50 +01:00
CONTRIBUTING.md Meta: Add a note about resolving PR review comments 2023-10-18 13:32:13 +02:00
LICENSE Meta: Update the year range in LICENSE 2024-01-06 17:39:16 -05:00
README.md Meta: Add implicitfield to the contributors list :^) 2024-02-26 13:51:40 -07:00
SECURITY.md Meta: Add a security policy 2022-06-29 03:29:27 +00:00

README.md

SerenityOS

Graphical Unix-like operating system for x86-64 computers.

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FAQ | Documentation | Build Instructions

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:

Screenshot

Screenshot as of c03b788.png

Features

  • Modern x86 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, 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 three 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.