text bubble.

Image magick. Make a cloud sort of text bubble. convert -background gray  -fill white  -gravity center -font /usr/share/fonts/truetype/msttcorefonts/Comic_Sans_MS_Bold.ttf -pointsize 16 -size 260x -stroke white -strokewidth 25 caption:’Sample writing, text cut off to the right’ -background transparent -fill black -stroke none caption:’Sample writing, text cut off to the right’ -gravity center -compose over -composite caption.png