Combining with transparency

[adrinux]

After much manual/example reading and experimentation I've constructed a string of commands that give the result I want:

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convert -size 994x300 xc:white -stroke '#bbbbbb' -strokewidth 5 -fill transparent -draw "roundrectangle 1,1 992,298 10,10" -gaussian 12,4 innershadow.png
convert -size 994x300 xc:'#302f2b' -fill white -draw "roundrectangle 3,3 990,296 10,10" +transparent '#302f2b' border.png
convert border.png innershadow.png -compose dst-atop -composite border-shadow.png
convert border-shadow.png -stroke '#7c000d' -strokewidth 3 -fill transparent -draw "roundrectangle 1,1 992,298 10,10" rounded-shadowed.png

Now I'm looking to combine these commands and failing at the first hurdle. So combining the first 3:

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convert -size 994x300 xc:'#302f2b' -fill white -draw "roundrectangle 3,3 990,296 10,10" +transparent '#302f2b' \( +clone xc:white -stroke '#bbbbbb' -strokewidth 5 -fill transparent -draw "roundrectangle 1,1 992,298 10,10" -gaussian 12,4 \) -compose dst-atop -composite result.png

Results in the white background and gaussian shadow effectively disappearing, leaving the centre of the image transparent instead of white. What do I need to do so that the src image is seen through the transparent area of destination when combining the commands?

[adrinux]

Half answering my own question, adding a +matte to the clone does the trick:

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convert -size 994x300 xc:'#302f2b' -fill white -draw "roundrectangle 3,3 990,296 10,10" +transparent '#302f2b' \( +clone +matte xc:white -stroke '#bbbbbb' -strokewidth 5 -fill transparent -draw "roundrectangle 1,1 992,298 10,10" -gaussian 12,4 \) -compose dst-atop -composite result.png

This disables the transparency added in the first part, so the clone doesn't show as transparent. I think

Now to add the rest of the commands...

[adrinux]

Here's the final result, since I found no examples of an inner shadow elsewhere. This has reduced dimensions compared to the above and a more obvious shadow, since it's just an example rather than what I actually need.

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convert -size 200x200 xc:'#302f2b' -fill white -draw "roundrectangle 3,3 196,196 10,10" +transparent '#302f2b' \( +clone +matte xc:white -stroke '#333333' -strokewidth 5 -fill transparent -draw "roundrectangle 1,1 198,198 10,10" -gaussian 12,4 \) -compose dst-atop -composite -stroke '#7c000d' -strokewidth 3 -fill transparent -draw "roundrectangle 1,1 198,198 10,10" result.png