On 4 April 2014 08:33, Pharo4Stef <pharo4s...@free.fr> wrote: > Igor > > I was wondering the following: ? But TextStyle is not about strikefont? > > TextStyle contains so many different things..
> Stef > > On 04 Apr 2014, at 02:55, Igor Stasenko <siguc...@gmail.com> wrote: > > > Okay, i think i got it.. > > > > Here is what happens: > > - the font size is usually specified in points, not x@y points, but > typographical points, > > which is > > 1/72 inch > > > > > > TextStyle pointsToPixels: 14 > > > > TextStyle pointsToPixels: 14 => 18.666666666666668 > > > > pointsToPixels: points > > ^points * self pixelsPerInch / 72.0 > > > > > > but in Athens, i , stupid idiot, completely forgot about that, > > and use point size directly, to scale up font .. > > but the point is that this scaling performed in font units (EMs). > > > > so, to actually scale font correctly, i must use same TextStyle > pointsToPixels: .. > > as Freetype package using.. > > > > there is one caveat, that if you really want to see exactly , say 16 > points sized font on your screen, > > it is not possible without knowing the display resolution - how many > pixels in one inch (hence > > #pixelsPerInch ). > > Unfortunately, our VMs don't give us a way to determine DPI of display.. > > and so, it is always 96 :/ > > > > pheww.... > > > > fromFreetypeFont: aFont cairoFace: face > > ..... > > > > - fontMatrix scaleBy: aFont pointSize. > > > > + fontMatrix scaleBy: (TextStyle pointsToPixels: aFont pointSize). > > > > problem solved ... (i hope) :) > > > > -- > > Best regards, > > Igor Stasenko. > > > -- Best regards, Igor Stasenko.
