Re: strokeadjust:ing by default

[Alexander Malmberg]

Adrian Robert wrote:
> On Jan 18, 2005, at 8:59 AM, Alexander Malmberg wrote:
> > As an example, here a are a bunch of lines without strokeadjusting:
> >
> > http://web.telia.com/~u42308495/alex/backart/lines_strokeadjust_off.png
> >
> > and with:
> >
> > http://web.telia.com/~u42308495/alex/backart/lines_strokeadjust_on.png
>
> It looks like the strokeadjust_on case definitely lets you see more 
> detail on a resolution-limited display.  Very nice.  Do you have any
> comparable shots for diagonal lines and curves (closely-spaced or 
> otherwise)?

The current implementation doesn't do anything about diagonal lines or 
curves, so there's nothing to show. It's tricky to do anything useful 
with them, but if there turns out to be a need and I can think of 
something to do, I might extend the adjustments.

> Also what about thicker lines, or would we not see a difference for
> those?

There are thicker lines in the example image. There is a difference, but 
it isn't as noticeable as it is for thin lines.

> And what about more ordinary application window / GUI types
> of situations?  Would we see a difference here?

Sometimes, yes. The primary motivation for doing this was to handle 
straight horizontal or vertical lines that are drawn right between 
pixels (which seems to be fairly common, probably because developers are 
unfamiliar with postscript). Often, it's better to adjust the 
coordinates in the app, but when translating or scaling (e.g. when I 
finish support for DPI!=72), only the backend will know what the 
coordinates should be :).

- Alexander Malmberg