Properties: doesn't detect monospace / oblique / condensed?

[dhardy]

On my system this lib detects 194 fonts. Of these:

• The "bold" property appears to be detected correctly
• "italic" is set true for any "oblique" font while the "oblique" property is always DontCare (to be honest I'm not sure what behaviour is expected here)
• The "monospace" property is always DontCare
• Some fonts are "condensed"; the lib has no property for this

I was considering how to select fonts using CSS-like properties (as in font-kit, implemented here and here). It appears that currently not enough properties are detected to do this. Are you planning on adding selection/matching logic?

Example: the DejaVu family:

name	family	italic	oblique	bold	monospace	path	index
DejaVu Sans	DejaVu Sans	FALSE	DontCare	FALSE	DontCare	/usr/share/fonts/dejavu-sans-fonts/DejaVuSans.ttf	0
DejaVu Sans Bold	DejaVu Sans	FALSE	DontCare	TRUE	DontCare	/usr/share/fonts/dejavu-sans-fonts/DejaVuSans-Bold.ttf	0
DejaVu Sans Bold Oblique	DejaVu Sans	TRUE	DontCare	TRUE	DontCare	/usr/share/fonts/dejavu-sans-fonts/DejaVuSans-BoldOblique.ttf	0
DejaVu Sans Condensed	DejaVu Sans Condensed	FALSE	DontCare	FALSE	DontCare	/usr/share/fonts/dejavu-sans-fonts/DejaVuSansCondensed.ttf	0
DejaVu Sans Condensed Bold	DejaVu Sans Condensed	FALSE	DontCare	TRUE	DontCare	/usr/share/fonts/dejavu-sans-fonts/DejaVuSansCondensed-Bold.ttf	0
DejaVu Sans Condensed Bold Oblique	DejaVu Sans Condensed	TRUE	DontCare	TRUE	DontCare	/usr/share/fonts/dejavu-sans-fonts/DejaVuSansCondensed-BoldOblique.ttf	0
DejaVu Sans Condensed Oblique	DejaVu Sans Condensed	TRUE	DontCare	FALSE	DontCare	/usr/share/fonts/dejavu-sans-fonts/DejaVuSansCondensed-Oblique.ttf	0
DejaVu Sans ExtraLight	DejaVu Sans Light	FALSE	DontCare	FALSE	DontCare	/usr/share/fonts/dejavu-sans-fonts/DejaVuSans-ExtraLight.ttf	0
DejaVu Sans Mono	DejaVu Sans Mono	FALSE	DontCare	FALSE	DontCare	/usr/share/fonts/dejavu-sans-mono-fonts/DejaVuSansMono.ttf	0
DejaVu Sans Mono Bold	DejaVu Sans Mono	FALSE	DontCare	TRUE	DontCare	/usr/share/fonts/dejavu-sans-mono-fonts/DejaVuSansMono-Bold.ttf	0
DejaVu Sans Mono Bold Oblique	DejaVu Sans Mono	TRUE	DontCare	TRUE	DontCare	/usr/share/fonts/dejavu-sans-mono-fonts/DejaVuSansMono-BoldOblique.ttf	0
DejaVu Sans Mono Oblique	DejaVu Sans Mono	TRUE	DontCare	FALSE	DontCare	/usr/share/fonts/dejavu-sans-mono-fonts/DejaVuSansMono-Oblique.ttf	0
DejaVu Sans Oblique	DejaVu Sans	TRUE	DontCare	FALSE	DontCare	/usr/share/fonts/dejavu-sans-fonts/DejaVuSans-Oblique.ttf	0
DejaVu Serif	DejaVu Serif	FALSE	DontCare	FALSE	DontCare	/usr/share/fonts/dejavu-serif-fonts/DejaVuSerif.ttf	0
DejaVu Serif Bold	DejaVu Serif	FALSE	DontCare	TRUE	DontCare	/usr/share/fonts/dejavu-serif-fonts/DejaVuSerif-Bold.ttf	0
DejaVu Serif Bold Italic	DejaVu Serif	TRUE	DontCare	TRUE	DontCare	/usr/share/fonts/dejavu-serif-fonts/DejaVuSerif-BoldItalic.ttf	0
DejaVu Serif Condensed	DejaVu Serif Condensed	FALSE	DontCare	FALSE	DontCare	/usr/share/fonts/dejavu-serif-fonts/DejaVuSerifCondensed.ttf	0
DejaVu Serif Condensed Bold	DejaVu Serif Condensed	FALSE	DontCare	TRUE	DontCare	/usr/share/fonts/dejavu-serif-fonts/DejaVuSerifCondensed-Bold.ttf	0
DejaVu Serif Condensed Bold Italic	DejaVu Serif Condensed	TRUE	DontCare	TRUE	DontCare	/usr/share/fonts/dejavu-serif-fonts/DejaVuSerifCondensed-BoldItalic.ttf	0
DejaVu Serif Condensed Italic	DejaVu Serif Condensed	TRUE	DontCare	FALSE	DontCare	/usr/share/fonts/dejavu-serif-fonts/DejaVuSerifCondensed-Italic.ttf	0
DejaVu Serif Italic	DejaVu Serif	TRUE	DontCare	FALSE	DontCare	/usr/share/fonts/dejavu-serif-fonts/DejaVuSerif-Italic.ttf	0

[dhardy]

In comparison, fontdb detects 220 fonts (all still under /usr/share/fonts): one .ttc file contains two faces with only one detected by this lib, otherwise I'm not quite sure where the count difference comes from.

In terms of properties, fontdb also doesn't detect any "oblique" fonts but does a better job of detecting weight and "condensed".

@RazrFalcon comparison table from fontdb for DejaVu fonts below.

name	family	style	weight	stretch	monospace	path	index
DejaVuSans-Bold	DejaVu Sans	Normal	Weight(700)	Normal	FALSE	/usr/share/fonts/dejavu/DejaVuSans-Bold.ttf	0
DejaVuSans-BoldOblique	DejaVu Sans	Italic	Weight(700)	Normal	FALSE	/usr/share/fonts/dejavu/DejaVuSans-BoldOblique.ttf	0
DejaVuSans-ExtraLight	DejaVu Sans Light	Normal	Weight(200)	Normal	FALSE	/usr/share/fonts/dejavu/DejaVuSans-ExtraLight.ttf	0
DejaVuSans-Oblique	DejaVu Sans	Italic	Weight(400)	Normal	FALSE	/usr/share/fonts/dejavu/DejaVuSans-Oblique.ttf	0
DejaVuSans	DejaVu Sans	Normal	Weight(400)	Normal	FALSE	/usr/share/fonts/dejavu/DejaVuSans.ttf	0
DejaVuSansCondensed-Bold	DejaVu Sans Condensed	Normal	Weight(700)	SemiCondensed	FALSE	/usr/share/fonts/dejavu/DejaVuSansCondensed-Bold.ttf	0
DejaVuSansCondensed-BoldOblique	DejaVu Sans Condensed	Italic	Weight(700)	SemiCondensed	FALSE	/usr/share/fonts/dejavu/DejaVuSansCondensed-BoldOblique.ttf	0
DejaVuSansCondensed-Oblique	DejaVu Sans Condensed	Italic	Weight(400)	SemiCondensed	FALSE	/usr/share/fonts/dejavu/DejaVuSansCondensed-Oblique.ttf	0
DejaVuSansCondensed	DejaVu Sans Condensed	Normal	Weight(400)	SemiCondensed	FALSE	/usr/share/fonts/dejavu/DejaVuSansCondensed.ttf	0
DejaVuSansMono-Bold	DejaVu Sans Mono	Normal	Weight(700)	Normal	TRUE	/usr/share/fonts/dejavu/DejaVuSansMono-Bold.ttf	0
DejaVuSansMono-BoldOblique	DejaVu Sans Mono	Italic	Weight(700)	Normal	TRUE	/usr/share/fonts/dejavu/DejaVuSansMono-BoldOblique.ttf	0
DejaVuSansMono-Oblique	DejaVu Sans Mono	Italic	Weight(400)	Normal	TRUE	/usr/share/fonts/dejavu/DejaVuSansMono-Oblique.ttf	0
DejaVuSansMono	DejaVu Sans Mono	Normal	Weight(400)	Normal	TRUE	/usr/share/fonts/dejavu/DejaVuSansMono.ttf	0
DejaVuSerif-Bold	DejaVu Serif	Normal	Weight(700)	Normal	FALSE	/usr/share/fonts/dejavu/DejaVuSerif-Bold.ttf	0
DejaVuSerif-BoldItalic	DejaVu Serif	Italic	Weight(700)	Normal	FALSE	/usr/share/fonts/dejavu/DejaVuSerif-BoldItalic.ttf	0
DejaVuSerif-Italic	DejaVu Serif	Italic	Weight(400)	Normal	FALSE	/usr/share/fonts/dejavu/DejaVuSerif-Italic.ttf	0
DejaVuSerif	DejaVu Serif	Normal	Weight(400)	Normal	FALSE	/usr/share/fonts/dejavu/DejaVuSerif.ttf	0
DejaVuSerifCondensed-Bold	DejaVu Serif Condensed	Normal	Weight(700)	SemiCondensed	FALSE	/usr/share/fonts/dejavu/DejaVuSerifCondensed-Bold.ttf	0
DejaVuSerifCondensed-BoldItalic	DejaVu Serif Condensed	Italic	Weight(700)	SemiCondensed	FALSE	/usr/share/fonts/dejavu/DejaVuSerifCondensed-BoldItalic.ttf	0
DejaVuSerifCondensed-Italic	DejaVu Serif Condensed	Italic	Weight(400)	SemiCondensed	FALSE	/usr/share/fonts/dejavu/DejaVuSerifCondensed-Italic.ttf	0
DejaVuSerifCondensed	DejaVu Serif Condensed	Normal	Weight(400)	SemiCondensed	FALSE	/usr/share/fonts/dejavu/DejaVuSerifCondensed.ttf	0

[RazrFalcon]

In terms of properties, fontdb also doesn't detect any "oblique" fonts

Are you sure? Can you provide a test file, preferably on the fontdb bug tracker.

[dhardy]

Are you sure?

Assuming you have a Linux system, DejaVu fonts should already be installed? Several variants (see the table above) are named "oblique" and in appearance are "oblique" (just a slanted variant of the regular face), but are listed in the table above as "Italic". Also:

$ fc-list
..
/usr/share/fonts/dejavu/DejaVuSans-Oblique.ttf: DejaVu Sans:style=Oblique

Edit: posted https://github.com/RazrFalcon/fontdb/issues/10, I think you can find the font file?