convert -draw "image 'dissolve ...'..." doesn't work

[glennrp]

When I do this

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convert frame.png -draw 'image "dissolve 10x100" 100,100 0,0 text.png' combined.png

it behaves like -draw 'image over ...' (i.e., the text isn't transparent). I tried 100x10, and tried swapping the quotes and double-quotes but still got the same result.

[anthony]

dissolve defaults is a 'over' when it has now arguments defined.

As such...

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convert granite: -gravity center -draw 'image dissolve 0,0,0,0 "rose:" ' show

:
comes out just like

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convert granite: -gravity center -draw 'image over 0,0,0,0 "rose:" ' show:

However a quick test seems to show that 'draw' composition does not make use of the compose:args

Here however is the command for using -composite for the dissolved overlay

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   convert granite: rose: -alpha on  -gravity center   \
              -compose dissolve  -define compose:args=50    -composite  \
              show:

Note the define 'name' must be exactly as given or it does not work.