=2D----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Sunday 26 Jan 2003 4:51 pm, Alan Chandler wrote: > I am not sure that I have found the right place to ask this question. > > A few weeks ago, I installed fontconfig (Debian Unstable), with (I assume= - > and thats why I am not sure I am at the right place) libxft2. > > Since then, I have had a strange problem in kde (konsole) with the console > font that it provides (see http://bugs.kde.org/show_bug.cgi?id=3D52538 ) Nobody replied to this posting so I STILL don't know if I am at the right=20 place. > > I have been trying to debug the problem over the last couple of weeks and > have narrowed it down to the fact that using QT - if I toggle the > FixedPitch property of the font that a piece of text is displayed in the > text display displays normally when the Fixed Pitch attribute is off and > seems to have a double width spacing when the Fixed Pitch attribute is on. > > With a small application doing just that - I have been running a debugger > into the qt code to find why it changes the character spacing. =20 The font family is Helvetica OK - I now can see exactly what is happening. QT looks for a font that=20 matches the characteristics - it is finding a match from Xft both for non=20 =46ixed Pitch (XFT_PROPORTIONAL) and Fixed Pitch (XFT_MONO or XFT_CHARCELL)= =20 dependent of whether its own fixedPitch flag has been set by the applicatio= n. > Its > difficult to be sure but I am almost convinced that when it calls the xft > library to render the text it does not know that it will be rendered at > this double width. I am wrong here - and this is the crux of the problem. Individual characte= r=20 widths are found by calling XftTextExtent16. When Helvetica font (default)= =20 is found which is XFT_PROPORTIONAL - the individual character widths vary=20 from 4 pixels wide for a space to 9 pixels wide for a 'm'. When the same=20 font is found which has a type of XFT_MONO or XFT_CHARCELL then every=20 character has a width of 12 pixels. This distorts the font and makes it lo= ok=20 stretched out, with a large gap between each character. I repeated the test with the "Console" font - which was the subject of my=20 original bug report and is supposidely a fixed pitch font naturally, at it = is=20 returning (for point size 12) character widths of 26 pixels. I don't know if this is considered a bug, or where to report it to. =2D --=20 Alan Chandler alan@xxxxxxxxxxxxxxxxxxxxx =2D----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE+PXusuFHxcV2FFoIRAnBAAJ9GAYdeNOswudBFh0ki2KMjng7UvwCfWe3N EBayNLqDZPHhbEXuG3tsgPk=3D =3Dne+u =2D----END PGP SIGNATURE-----
