John TurandZed Zippy
a38fc8c8de
Apple's text rendering stack dilates glyph outlines for text rendered with a light foreground color. Zed doesn't consider this nuance today; we populate our atlas using glyphs rendered with a dark foreground color. This means that, particularly in dark themes, text in Zed looks thin and blurry, and doesn't match the look of native macOS applications. This pull request replicates the native behavior of Core Graphics. Some reverse-engineering revealed that CG computes the foreground color luminance using the Rec. 709 formula ($Y=0.2126R + 0.7152B + 0.0722G$) and quantizes it into five levels (0, 0.25, 0.5, 0.75, and 1). Each level uses a different dilation factor. With this patch, we calculate this same luminance bucket and supply it as the foreground color during rasterization. The correct dilation will be applied, and we'll store this glyph in the atlas keyed by this luminance bucket. So, we'll generate and use up to 5 different bitmaps for each glyph based on its foreground color. I've confirmed that text rendered by Zed now exactly matches native applications like Safari, TextEdit, etc. Release Notes: - Improved text rendering clarity on macOS, particularly in dark themes. --------- Co-authored-by: Zed Zippy <234243425+zed-zippy[bot]@users.noreply.github.com>
Zed
Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
Installation
On macOS, Linux, and Windows you can download Zed directly or install Zed via your local package manager (macOS/Linux/Windows).
Other platforms are not yet available:
- Web (tracking issue)
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 specifiederror for a crate you've created? If so, addpublish = falseunder[package]in your crate's Cargo.toml. - Is the error
failed to satisfy license requirementsfor 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 theacceptedarray inscript/licenses/zed-licenses.toml. - Is
cargo-aboutunable to find the license for a dependency? If so, add a clarification field at the end ofscript/licenses/zed-licenses.toml, as specified in the cargo-about book.
Sponsorship
Zed is developed by Zed Industries, Inc., a for-profit company.
If you’d like to financially support the project, you can do so via GitHub Sponsors. Sponsorships go directly to Zed Industries and are used as general company revenue. There are no perks or entitlements associated with sponsorship.