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Truly independent web browser
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Nico Weber 9bff8abcc7 LibPDF: Add support for array image masks 
An array image mask contains a min/max range for each channel,
and if each channel of a given pixel is in that channel's range,
that pixel is masked out (i.e. transparent). (It's similar to
having a single color or palette index be transparent, but it
supports a range of transparent colors if desired.)

What makes this a bit awkward is that the range is relative to the
origin bits per pixel and the inputs to the image's color space.

So an indexed (palettized) image with 4bpp has a 2-element mask
array where both entries are between 0 and 15.

We currently apply masks after converting images to a Gfx::Bitmap,
that is after converting to 8bpp sRGB. And we do this by mapping
everything to 8bpp very early on in load_image().

This leaves us with a bunch of options that are all a bit awkward:

1. Make load_image() store the up- (or for 16bpp inputs, down-)
   sampled-to-8bpp pixel data. And also return if we expanded the
   pixel range while resampling (for color values) or not (for
   palettized images). Then, when applying the image filter,
   resample the array bounds in exactly the same way. This requires
   passing around more stuff.

2. Like 1, but pass in the mask array to load_image() and apply
   the mask right there and then. This means we'd apply mask arrays
   at a different time than other masks.

3. Make the function that computes the mask from the mask array
   work from the original, unprocessed image data. This is the most
   local change, but probably also requires the largest amount of
   code (in return, the color mask for 16bpp images is precise, in
   addition that it separates concerns the most nicely).

This goes with 3 for now.
2024-03-03 11:18:37 -05:00
.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/HashMap: Use structured bindings when iterating over itself 2024-03-01 14:05:53 -07:00
Base Base: Extend the web-animations demo to showcase complex transforms 2024-03-02 12:25:53 +01:00
Documentation Documentation: Update for the removal of SERENITY_SOURCE_DIR requirement 2024-02-26 13:16:27 -07:00
Kernel Kernel: Switch a couple of signal dispatch dbglns to dbgln_if 2024-03-02 09:10:14 +01:00
Ladybird Ladybird: Use Core::Environment instead of Core::System::*env() 2024-02-27 08:33:48 +00:00
Meta CI: Reduce the ccache size for CI 2024-03-02 09:11:03 +01:00
Ports Ports: Update OpenRCT2 to version 0.4.8 2024-02-24 23:26:26 +01:00
Tests LibWeb: Add input and textarea minlength and maxlength support 2024-03-03 10:02:30 -05:00
Toolchain Kernel: Add initial basic support for KASAN 2023-12-30 13:57:10 +01:00
Userland LibPDF: Add support for array image masks 2024-03-03 11:18:37 -05:00
.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 Meta: Add a post-commit commit message linter hook 2021-05-02 16:28:01 +02:00
.prettierignore LibJS: Add DisposableStack{, Prototype, Constructor} 2023-01-23 09:56:50 +00:00
.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: 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.

GitHub Actions Status Azure DevOps Status Fuzzing Status Sonar Cube Static Analysis Discord

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.