Auto width and height with imagemagick? -

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i'm creating image of string of text imagemagick , need both width , height of image conform size of text.

currently, use "caption" command , specify width of 300px, image 300px wide, , text wraps if longer 300px.

i guess need still specify maxwidth somewhere in imagemagick code, text still wraps @ 300px.. width of image fit longest line of wrapped text , not 300px. possible?


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