Converting XWD -> BMP -> PNG (transparency problem)

[slackhead]

I have a script that uses xwd to grab a screenshot, then convert converts in to png.

If I screenshot a terminal with a transparent background the resulting png loses it's transparency somehow. If I convert to bmp it works fine,but converting said bmp to png again loses its transparency. If I convert to gif it works, but the image quality is quite poor.

If I use the -root option of xwd everything works fine, but that takes a shot of the whole desktop with no prompting.

I've tried playing with -alpha options etc but not found anything that works. Any ideas?

I'm not using any options:

convert screen.xwd screen.bmp
convert screen.bmp screen.png

Here's an example made with xwd -root option: http://www.r0t.co.uk/sshots/shot-2821497685.png
And this is with coverted directly to png without the -root option, http://www.r0t.co.uk/sshots/shot-7284893223.png
If I convert to bmp and display it looks correct, but doesn't convert to png properly.

[fmw42]

Can you provide a link to the xwd file so others can test with it?

What version of IM and platform are you using?