Variable argument in a string

[A-KouZ1]

I'm trying to create a thin border around image edge which has margin 16px from its size:

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convert Original\0_0.png -bordercolor none -border 16  -fill none -stroke red -strokewidth 1 -draw "rectangle 0,0 %%w%%,%%h%%" 0_0.png

But it is ended up with error:

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convert Original\0_0.png -bordercolor none -border 16  -fill none -stroke red -strokewidth 1 -draw "rectangle 0,0 %w%,%h%" 0_0.jpg
convert: non-conforming drawing primitive definition `rectangle' @ error/draw.c/DrawImage/3401.

I expect that this is an error when reading %w% but not treated as variable.

What to do to make this works out?

This code runs through batch, so I need escape %w% with %%w%%
ImageMagick v7 - Windows 10

[muccigrosso]

%w, not %w% and magick instead of convert for v 7 functionality.

Not sure it does what you want, but at least no errors for me.

[A-KouZ1]

Oh, that's works out, thanks!
But, however, I can't use lastx and lasty.
I decided to replace w,h with lastx,lasty.
where lastx=w-1; lasty=h-1

There are solution?

[A-KouZ1]

Ok, I had figured the solution myself.

With the use of fx[] in argument:

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magick Original\0_0.png -bordercolor none -border 16  -fill none -stroke red -strokewidth 1 -draw "rectangle 0,0 %%[fx:w-1],%%[fx:h-1]" 0_0.jpg 

Sincerely, thanks anyway.