Re: Pango device units

[Owen Taylor <otaylor redhat com>]

On Wed, 2003-08-27 at 19:22, Pawel S. Veselov wrote:
> Hi,
>
> a quick one.
>
> What's the ratio between pango device units (points)
> and the actual number of pixels, and how to figure it out
> programatically ?

Pango units are basically a fixed point number - the
scale is given by PANGO_SCALE (1024 as it happens).

What a value of 1.0 * PANGO_SCALE means is up to the
backend - the current backends all treat it as one pixel,
but a Postscript background would probably use 1 point
instead.

There is a PANGO_PIXELS() macro round that more or less
is:

 nearest_integer (val / PANGO_SCALE)

To convert from a integer number of pixels to a pango,
just multiple by PANGO_SCALE.

Regards,
                                        Owen