What font is actually used when I set font_family Fira Code?

[zzhaolei]

Use font_features FiraCode-Regular +cv06, but the character i is not expected.

font_family   Fira Code
font_features FiraCode-Regular +cv06 +cv27 +cv31

expect：

actual：

[zzhaolei]

I think kitty use FiraCodeRoman-Regular

[page-down]

Use the --psnames parameter to check the PostScript names of the fonts used by font_features.

kitty +list-fonts --psnames | grep Fira

With Fira Code v6 static fonts (multiple TTFs), I tested fine under macOS. However it does not seem to work in Linux (Ubuntu LTS).

kitty --config=NONE -o 'font_family Fira Code' -o 'font_features FiraCode-Regular +cv01 +cv06' -o font_size=24 --debug-font-fallback

[zzhaolei]

This one doesn't work for me.

kitty version: 0.23.1
macOS version: macOS Monterey 12.0.1
Fira Code font: v6

output log:

[337 14:10:51.795283] Preloaded font faces:
[337 14:10:51.795316] normal face: /Users/zzhaolei/Library/Fonts/FiraCode-VF.ttf
[337 14:10:51.795328] bold face: /Users/zzhaolei/Library/Fonts/FiraCode-VF.ttf
[337 14:10:51.795338] italic face: /Users/zzhaolei/Library/Fonts/FiraCode-VF.ttf
[337 14:10:51.795348] bi face: /Users/zzhaolei/Library/Fonts/FiraCode-VF.ttf
U+276f bold Face(family=Menlo, full_name=Menlo Regular, postscript_name=Menlo-Regular, path=/System/Library/Fonts/Menlo.ttc, units_per_em=2048, ascent=22.3, descent=5.7, leading=0.0, point_sz=0.0, scaled_point_sz=24.0, underline_position=-1.5 underline_thickness=1.1) (new face)

[zzhaolei]

This is working fine:

kitty --config=NONE -o 'font_family Fira Code' -o 'font_features FiraCodeRoman-Regular +cv01 +cv06' -o font_size=24 --debug-font-fallback

[page-down]

I have static fonts installed on macOS, no wonder they work fine. The PostScript name of the variable font is not even the same as the static font.

kitty +list-fonts --psnames | grep Fira

macOS

# static font: FiraCode-Regular.ttf, FiraCode-Bold.ttf, ...
Fira Code
    Fira Code Bold (FiraCode-Bold)
    Fira Code Light (FiraCode-Light)
    Fira Code Medium (FiraCode-Medium)
    Fira Code Regular (FiraCode-Regular)
    Fira Code Retina (FiraCode-Retina)
    Fira Code SemiBold (FiraCode-SemiBold)

# variable font: FiraCode-VF.ttf
Fira Code
    Fira Code Bold (FiraCodeRoman-Bold)
    Fira Code Light (FiraCode-Light)
    Fira Code Medium (FiraCodeRoman-Medium)
    Fira Code Regular (FiraCodeRoman-Regular)
    Fira Code SemiBold (FiraCodeRoman-SemiBold)

Several font weights are invalid under Linux. Even if these are from the exact same TTF files. Does this seem to be an issue with the font itself?

Linux

# static font: FiraCode-Regular.ttf, FiraCode-Bold.ttf, ...
Fira Code
    Fira Code Bold (FiraCode-Bold)
    Fira Code Light (FiraCode-Light)

# variable font: FiraCode-VF.ttf
Fira Code
    Fira Code Light ()
    Fira Code Light (FiraCodeRoman_700wght)
    Fira Code Light (FiraCode-Light)

[zzhaolei]

I guess, yes.

[zzhaolei]

Now, this issue has been solved for me.

Thank you.