Re: gEDA-user: Windows versions [WAS: Re: Bug triage]

[Peter Clifton <pcjc2@xxxxxxxxx>]

On Mon, 2011-01-10 at 21:19 -0500, Rick wrote:
> On 1/10/2011 6:39 PM, Peter Clifton wrote:

> I don't mind dealing with SourceForge, but I want to be sure that what I 
> am reporting is considered a bug.  When I use gerbv under Windows Vista 
> the image on the screen is grainy and any features on the board that are 
> not orthogonal or at exactly 45 degrees, are very jagged.  Further, the 
> zoom can only magnify to a limited extent.  I can zoom in until about 
> 0.2 inches fill the screen.  So I am not able to make careful 
> measurements of fine features.  I assume this is different from gerbv 
> under Linux, or is this how the interface is designed?  Is this is not 
> expected behavior, should this be one or two reports?

If you ask on Gerbv developers list <gerbv-devel@xxxxxxxxxxxxxxxxxxxxx>
(might need to subscribe via SourceForge first), someone can tell you.
The gerbv developers are very receptive to bug reports.

Were you able to select which rendering method you used? Gerbv has a
drop down box on the left hand side which sets the quality and APIs used
to render.

Try "Rendering: Fast" -> "Rendering: High quality"

Regarding jaggies. I think gerbv deliberately draws with anti-aliasing
turned off for many of the rendering modes. This both improves speed,
and can help avoid "seams" appearing between different pieces of copper
which PCB uses to make up polygons.

Perversely, these seams "might" show up in "High quality" rendering
mode, but they are just a anti-aliasing artefact due to the fact cairo
does anti-aliasing as it draws each object, rather than global
anti-aliasing on the whole page.

Zoom limit "might" be deliberately coded - if it bothers you, file a
bug. If it affects your usability of the software, it indicates
something should be fixed there.

Best wishes,

-- 
Peter Clifton

Electrical Engineering Division,
Engineering Department,
University of Cambridge,
9, JJ Thomson Avenue,
Cambridge
CB3 0FA

Tel: +44 (0)7729 980173 - (No signal in the lab!)
Tel: +44 (0)1223 748328 - (Shared lab phone, ask for me)



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