mogrify - draw text from file on image doesn't work

[anthony]

The '@' and '%' escapes interfered with the use of -draw in the SVG vector image conversions. It also was not very usable when quoting problems had to be handled.

The IM v6 method is to use -annotate.

See IM Examples at
http://www.imagemagick.org/Usage/text/#annotate

Also note that when reading from a file IM will take the text as literial, that it it will NOT do any percent escapes, \n for newline (though real newlines are newlines!), or
another '@' file read. This is vital as it ensures that the input text draw is really what the user gets, regardless of what characters are using in that text.