Hi all,
I've been using Kicad for a while in a 'mucking around' sense,
supporting the capture and layout done by contractors of ours.

I have noticed that gerbv is failing to correctly represent gerbers
that they have sent for inspection. The gerbers were created by Protel
DXP.

What appears to be happening is that a single gerber layer contains
multiple elements which should be 'xor'ed drawn to create image,
however gerbv is 'or'ing the elements together to produce a solid
block of colour.

I have upload a screen shot to my files showing the issue:
http://f1.grp.yahoofs.com/v1/kOaMR_6BSh9DwyfY_QBJla5pSuWqFYKfCbYgbtH-jYzGOCIXLeWs5oktFQtDZbdihOZUVw6cOsKqr9BZ2v7nJuYHKT0a_Jq3/Mungewell/gerbv_failure.PNG

The hidden elements of the gerber are visible as the gerbv layer is
zoomed in/out, suggesting that they are drawn and then
overdrawn/masked by other elements in the layer.

On the left in the screenshot is another 'free' (beer) viewer which
correctly renders the same layer. It has a mode setting 'colours
merged' which will result in the same 'solid block' output as gerbv,
normal setting is 'colours solid'.

Any suggestions welcome, if not can someone add this as a low priority
bug for gerbv.
Cheers,
Mungewell.

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