Font rendering changed with latest version

[giann]

What Operating System(s) are you seeing this problem on?

macOS

Which Wayland compositor or X11 Window manager(s) are you using?

No response

WezTerm version

20240128-202157-1e552d76

Did you try the latest nightly build to see if the issue is better (or worse!) than your current version?

No, and I'll explain why below

Describe the bug

Font rendering suddenly got worse:

Before (20230712-072601-f4abf8fd):

Now (20240128-202157-1e552d76):

I tried playing with some font related config with no success.

To Reproduce

No response

Configuration

local wezterm = require("wezterm")

local function schemeForAppearance(appearance)
        if appearance:find("Dark") then
                return "ayu-dark"
        else
                return "ayu-light"
        end
end

return {
        font = wezterm.font("Iosevka Term SS04"),
        color_scheme = schemeForAppearance(wezterm.gui.get_appearance()),
        enable_tab_bar = true,
        hide_tab_bar_if_only_one_tab = true,
        initial_cols = 120,
        initial_rows = 39,
        audible_bell = "Disabled",
        line_height = 1.02,
        automatically_reload_config = true,
        enable_tab_bar = false,
}

Expected Behavior

No response

Logs

No response

Anything else?

No response

[lukasbindreiter]

I encountered the same issue - with the latest version the font seems very blurry and not sharp.

I think it is somehow related to Monitor DPI scaling, because for me it only was like this on my external monitor, for the built-in Mac display it looked the same as before.

Downgrading to the latest 2023 version resolved the issue again.

I tried setting config.dpi = 144, with that setting it looked sharp again, but on the built-in display it is way too large then so that's also not really an option. 😅

[hyperpuncher]

You can set freetype_load_flags = "DEFAULT" to get back previous font sharpness. It's mostly needed on low PPI displays (e.g., <100). But this only works in the nightly build.

[wez]

The default behavior for freetype_load_flags in nightly builds (when they pick up 21af10e) is to use NO_HINTING when the dpi is >= 100, otherwise DEFAULT

[ericuni]

I have the same issue too.
It can not display Chinese rightly.

environment

Debug Overlay
wezterm version: 20240128-202157-1e552d76 x86_64-apple-darwin
Window Environment: macOS 13.4 (22F66)
OpenGL: AMD Radeon Pro 555X OpenGL Engine 4.1 ATI-4.12.7

[wez]

@ericuni please file a separate issue

[github-actions]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues. If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.