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Kirill Bulatov e72021a26b
Implement perceptual gamma / contrast correction for Linux font rendering (#38862)
Part of https://github.com/zed-industries/zed/issues/7992
Port of https://github.com/zed-industries/zed/pull/37167 to Linux

When using Blade rendering (Linux platforms and self-compiled builds
with the Blade renderer enabled), Zed reads `ZED_FONTS_GAMMA` and
`ZED_FONTS_GRAYSCALE_ENHANCED_CONTRAST` environment variables for the
values to use for font rendering.

`ZED_FONTS_GAMMA` corresponds to
[getgamma](https://learn.microsoft.com/en-us/windows/win32/api/dwrite/nf-dwrite-idwriterenderingparams-getgamma)
values.
Allowed range [1.0, 2.2], other values are clipped.
Default: 1.8

`ZED_FONTS_GRAYSCALE_ENHANCED_CONTRAST` corresponds to
[getgrayscaleenhancedcontrast](https://learn.microsoft.com/en-us/windows/win32/api/dwrite_1/nf-dwrite_1-idwriterenderingparams1-getgrayscaleenhancedcontrast)
values.
Allowed range: [0.0, ..), other values are clipped.
Default: 1.0

Screenshots (left is Nightly, right is the new code):

* Non-lodpi display

With the defaults:

<img width="2560" height="1600" alt="image"
src="https://github.com/user-attachments/assets/987168b4-3f5f-45a0-a740-9c0e49efbb9c"
/>


With `env ZED_FONTS_GRAYSCALE_ENHANCED_CONTRAST=7777`: 

<img width="2560" height="1600" alt="image"
src="https://github.com/user-attachments/assets/893bc2c7-9db4-4874-8ef6-3425d079db63"
/>


Lodpi, default settings:
<img width="3830" height="2160" alt="image"
src="https://github.com/user-attachments/assets/ec009e00-69b3-4c01-a18c-8286e2015e74"
/>

Lodpi, font size 7:
<img width="3830" height="2160" alt="image"
src="https://github.com/user-attachments/assets/f33e3df6-971b-4e18-b425-53d3404b19be"
/>


Release Notes:

- Implement perceptual gamma / contrast correction for Linux font
rendering

---------

Co-authored-by: localcc <work@localcc.cc>
2025-09-25 16:02:27 +03:00
.cargo RFC: Recommend and enable using Wild rather than Mold on Linux for local builds (#37717) 2025-09-25 10:35:13 +02:00
.cloudflare docs: Document context servers (#21170) 2024-11-25 11:05:14 -05:00
.config Rodio audio (#37786) 2025-09-10 22:48:33 +02:00
.github Add community champion auto labeler (#38802) 2025-09-24 16:42:01 +00:00
.zed Ensure *.json recognized as JSONC if checkout folder not zed (#34289) 2025-07-11 14:25:09 +00:00
assets Adjust keymap to not conflict with the french keyboard layout (#38868) 2025-09-25 11:25:22 +00:00
crates Implement perceptual gamma / contrast correction for Linux font rendering (#38862) 2025-09-25 16:02:27 +03:00
docs Implement perceptual gamma / contrast correction for Linux font rendering (#38862) 2025-09-25 16:02:27 +03:00
extensions extension_host: Replace backslashes with forward slashes for cwd on Windows (#38072) 2025-09-12 19:22:24 +02:00
legal Fix the markdown table (#38729) 2025-09-23 16:49:45 +00:00
nix nix: Update flake, remove legacy Darwin SDK usage (#37254) 2025-08-31 14:09:09 -07:00
script RFC: Recommend and enable using Wild rather than Mold on Linux for local builds (#37717) 2025-09-25 10:35:13 +02:00
tooling perf: Bugfixes (#38725) 2025-09-24 16:03:08 +00:00
.clinerules Initial .rules file for agent with symlinks for other rules file paths (#29014) 2025-04-17 23:41:23 +00:00
.cursorrules Initial .rules file for agent with symlinks for other rules file paths (#29014) 2025-04-17 23:41:23 +00:00
.git-blame-ignore-revs Add PR 15352 to .git-blame-ignore-revs (#30870) 2025-05-17 11:35:58 +00:00
.gitattributes windows: Make sure zed.sh using the correct line ending (#37650) 2025-09-05 16:25:55 +00:00
.gitignore perf: Greatly expand profiler (#38584) 2025-09-21 13:54:59 +02:00
.mailmap Update .mailmap (#30874) 2025-05-17 12:34:42 +00:00
.prettierrc ci: Add check for formatting default.json (#30034) 2025-05-06 18:55:26 +00:00
.rules Fix small spelling mistakes (#38284) 2025-09-16 21:58:40 +00:00
.windsurfrules Initial .rules file for agent with symlinks for other rules file paths (#29014) 2025-04-17 23:41:23 +00:00
Cargo.lock acp: Use ACP error types in read_text_file (#38863) 2025-09-25 11:53:36 +00:00
Cargo.toml acp: Use ACP error types in read_text_file (#38863) 2025-09-25 11:53:36 +00:00
CLAUDE.md Initial .rules file for agent with symlinks for other rules file paths (#29014) 2025-04-17 23:41:23 +00:00
clippy.toml Restructure agent context (#29233) 2025-04-24 21:29:33 +00:00
CODE_OF_CONDUCT.md Remove community content from docs and point to zed.dev (#19895) 2024-10-29 09:44:58 -04:00
compose.yml Fully qualify images in Docker Compose (#38496) 2025-09-19 10:12:49 -04:00
CONTRIBUTING.md Format CONTRIBUTING.md (#38073) 2025-09-12 16:39:54 +00:00
Cross.toml Add remote server cross compilation (#19136) 2024-10-12 23:23:56 -07:00
debug.plist WIP 2023-12-14 09:25:14 -07:00
default.nix Fix nix build (#26270) 2025-03-10 01:06:11 -07:00
docker-compose.sql collab: Setup database for LLM service (#15882) 2024-08-06 17:18:08 -04:00
Dockerfile-collab Bump Rust to 1.90 (#38436) 2025-09-22 14:36:10 -07:00
Dockerfile-collab.dockerignore ci: Move collab to Dockerfile-collab (#18515) 2024-09-30 16:14:26 -04:00
Dockerfile-cross Add remote server cross compilation (#19136) 2024-10-12 23:23:56 -07:00
Dockerfile-cross.dockerignore Add remote server cross compilation (#19136) 2024-10-12 23:23:56 -07:00
Dockerfile-distros Support More Linux (#18480) 2024-09-30 17:46:21 -04:00
Dockerfile-distros.dockerignore Support More Linux (#18480) 2024-09-30 17:46:21 -04:00
flake.lock Bump Rust to 1.90 (#38436) 2025-09-22 14:36:10 -07:00
flake.nix nix: Add job names and garnix substitutor (#31625) 2025-05-28 13:32:12 -07:00
LICENSE-AGPL Update license year (#24191) 2025-02-04 09:02:59 -05:00
LICENSE-APACHE Update license year (#24191) 2025-02-04 09:02:59 -05:00
LICENSE-GPL Licenses: change license fields in Cargo.toml to AGPL-3.0-or-later. (#5535) 2024-01-27 13:51:16 +01:00
livekit.yaml Add LiveKit server to Docker Compose (#7907) 2024-02-16 10:49:48 -05:00
lychee.toml ci: Check for broken links (#30844) 2025-06-06 09:39:35 +00:00
Procfile Update instructions for local collaboration (#35689) 2025-08-06 11:10:28 -07:00
Procfile.postgrest Fix llm queries (#16006) 2024-08-08 17:21:38 -07:00
Procfile.web Add a few more testing features (#36778) 2025-08-22 22:17:02 +00:00
README.md Adjust Zed badge (#35290) 2025-07-29 14:24:10 -04:00
renovate.json renovate: Require dependency dashboard approval for updates (#29065) 2025-04-18 18:44:30 +00:00
rust-toolchain.toml Bump Rust to 1.90 (#38436) 2025-09-22 14:36:10 -07:00
shell.nix Fix nix build (#26270) 2025-03-10 01:06:11 -07:00
typos.toml windows: Don’t skip the typo check for the windows folder (#37314) 2025-09-01 15:26:25 +00:00

Zed

Zed CI

Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.


Installation

On macOS and Linux you can download Zed directly or install Zed via your local package manager.

Other platforms are not yet available:

Developing Zed

Contributing

See CONTRIBUTING.md for ways you can contribute to Zed.

Also... we're hiring! Check out our jobs page for open roles.

Licensing

License information for third party dependencies must be correctly provided for CI to pass.

We use cargo-about to automatically comply with open source licenses. If CI is failing, check the following:

  • Is it showing a no license specified error for a crate you've created? If so, add publish = false under [package] in your crate's Cargo.toml.
  • Is the error failed to satisfy license requirements for a dependency? If so, first determine what license the project has and whether this system is sufficient to comply with this license's requirements. If you're unsure, ask a lawyer. Once you've verified that this system is acceptable add the license's SPDX identifier to the accepted array in script/licenses/zed-licenses.toml.
  • Is cargo-about unable to find the license for a dependency? If so, add a clarification field at the end of script/licenses/zed-licenses.toml, as specified in the cargo-about book.