Kirill Bulatovandlocalcc 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

..

ai

docs: Update note about agent message editor setting (#38805)

2025-09-24 13:57:30 -03:00

development

RFC: Recommend and enable using Wild rather than Mold on Linux for local builds (#37717)

2025-09-25 10:35:13 +02:00

extensions

docs: Mention required matching configs when developing language server extensions (#38674)

2025-09-22 21:40:50 +00:00

languages

docs: Add instructions for setting up fish_indent for fish (#38414)

2025-09-22 14:29:46 +03:00

accounts.md

Add another entry to show how to hide the Sign In button from the interface (#37260)

2025-08-31 10:29:29 +00:00

additional-learning-materials.md

update docs content (#11374)

2024-05-03 16:24:04 -06:00

all-actions.md

docs: Add table of all actions (#36642)

2025-08-20 23:41:06 +00:00

channels.md

docs: Adjust the channels page a bit (#31636)

2025-05-28 19:27:47 -03:00

collaboration.md

Clarify guests vs collaborators in project sharing docs (#22945)

2025-01-10 15:42:52 +00:00

completions.md

docs: Overhaul AI documentation (#29747)

2025-05-07 01:07:12 -03:00

configuring-languages.md

Start working on refreshing Python docs (#37880)

2025-09-18 08:53:30 -04:00

configuring-zed.md

Disable terminal breadcrumbs by default (#38806)

2025-09-25 10:25:37 +02:00

debugger.md

docs: Copyedit debugger.md and clarify settings location (#36996)

2025-08-31 11:19:25 +03:00

development.md

editor: Improve minimap performance (#33067)

2025-07-15 00:29:27 +03:00

diagnostics.md

docs: Update settings in diagnostics.md (#36806)

2025-08-23 19:11:27 +03:00

environment.md

docs: Fix typo in environment documentation (#19164)

2024-10-13 16:47:09 -04:00

extensions.md

extensions: Yet another PR for debugger touchups (#32822)

2025-06-17 07:34:55 +00:00

getting-started.md

Fix keybinds and 'No default binding' shown in docs (#35227)

2025-07-28 14:58:43 -04:00

git.md

Docs updates September (#38796)

2025-09-24 11:10:58 -05:00

globs.md

docs: Fix casing on mentions to some brand names (#37822)

2025-09-09 01:45:55 -03:00

helix.md

helix: Add match operator (#34060)

2025-09-08 08:48:47 -06:00

icon-themes.md

icon_theme_selector: Add footer and related docs (#25042)

2025-02-20 00:02:24 +00:00

key-bindings.md

docs: Include Cursor in the list of supported base keymaps (#37821)

2025-09-09 01:39:52 -03:00

languages.md

docs: Add Yara language extension (#28693)

2025-04-14 12:40:13 -04:00

linux.md

Implement perceptual gamma / contrast correction for Linux font rendering (#38862)

2025-09-25 16:02:27 +03:00

multibuffers.md

Fix a typo in the multi buffers documentation (#18535)

2024-09-30 15:28:46 +03:00

outline-panel.md

docs: Add tweaks to the outline panel page (#18697)

2024-10-03 12:27:42 -03:00

remote-development.md

docs: Update mentions to GitHub to use correct capitalization (#31996)

2025-06-03 14:55:24 -03:00

repl.md

docs: Fix casing on mentions to some brand names (#37822)

2025-09-09 01:45:55 -03:00

snippets.md

docs: Fix casing on mentions to some brand names (#37822)

2025-09-09 01:45:55 -03:00

SUMMARY.md

Docs updates September (#38796)

2025-09-24 11:10:58 -05:00

system-requirements.md

Add initial FreeBSD script & installation doc (#30981)

2025-06-06 23:14:25 +00:00

tasks.md

Document task filtering based on variables (#38642)

2025-09-23 23:26:33 +03:00

telemetry.md

onboarding: Remove feature flag and old welcome crate (#36110)

2025-08-13 13:18:24 -03:00

themes.md

chore: remove redundant word in comment (#30338)

2025-05-09 07:33:20 +00:00

toolchains.md

docs: Tweak the toolchains page (#38728)

2025-09-23 13:31:56 -03:00

vim.md

keymap validation: Improve message for action that takes no input (#37877)

2025-09-09 20:56:29 +00:00

visual-customization.md

Switch to "standard" as a default line height in the terminal (#38798)

2025-09-24 16:36:35 +00:00

windows.md

Remove callout for hiring (#33674)

2025-06-30 23:35:00 -07:00

workspace-persistence.md

Add visual customization section to documentation (#33133)

2025-06-21 22:55:53 -04:00