Hi Marting
On Nov 6, 2009, at 8:25 PM, Martin Vollrathson wrote:
> Hello!
>
> I was recently confused by the metrics involved in laying out text
> with Pango and Cairo.
>
> What I needed and expected was a way to specify the size and family of
> the font and the height of the lines and then have the text rendered
> accordning to those specifications. However I was very confused by the
> concept of line spacing and the absence of a line height property.
>
It can be a little confusing.
> When I found the line spacing property I assumed that the _heigh_ of
> the lines always was identical to the size of the font, however this
> apperas not to be so. I am very accustomed to the concept of
> line-height and font-size from CSS, perhaps that's why I find the
> Pango counterparts difficult to grasp.
>
I find the Freetype guide explains the terms used in Pango and
Freetype pretty well:
http://www.freetype.org/freetype2/docs/tutorial/step2.html> Could someone please elaborate on how I can most easily control the
> height of the lines in a Pango layout?
>
> What I want is a way to control the exact distance between the
> baselines of each line of text in a layout and perhaps the position of
> the baseline relative to each line.
>
I do not know if this can be done in an easy way. As I understand,
your request is to specify a height, and then no font will be exceed
that height?
If you use fontconfig you might be able to specify something in your
font description, I have not found it though.
Best regards.
--
Jesper L. Nielsen
Senior Software Engineer @ 2M-Locatel
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