This seems simple, but I tried:

convert -size 100x100 xc:none -fill red -draw 'circle 50,50 0,50' red-circle.png convert -size 100x100 xc:none -fill red -draw 'circle 50,50 0,49' red-circle.png

And numerous other variations, it either pushes one side too much or seems to be one pixel too small.

With both of your help I was able to get this working. Here is the end result:

http://dottedi.biz/codesamples/convert/index.php

It started with: http://dottedi.biz/codesamples/convert/test.jpg and is processed through php, convert, composite. To keep the image weight down I tested -dept 8, 6 & 4 with the .png files. I don't see much difference. Is there any reason why the png -depth 4 should not be used on a web page. I assume the IE pngfix will still work with it.

-Bob

Johan Vromans wrote:

Bob Meetin writes:

This seems simple, but I tried:

convert -size 100x100 xc:none -fill red -draw 'circle 50,50 0,50' red-circle.png ...
And numerous other variations, it either pushes one side too much or seems to be one pixel too small.

convert -size 100x100 xc:none -fill red -draw 'circle 49.5,49.5 0,50' red-circle.png

convert -size 101x101 xc:none -fill red -draw 'circle 50,50 0,50' red-circle.png

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