Image buffers

[christophejunke]

First patch allows custom message to pass through swank.lisp without error.
The second one allows to pass base64 strings as :data directly

(swank::send-to-emacs
 `(:write-image (:data ,(base64:usb8-array-to-base64-string
                         (vecto:with-canvas (:width 64 :height 64)
                           (vecto:set-rgb-stroke 100 100 100)
                           (vecto:move-to 0 0)
                           (vecto:line-to 64 64)
                           (vecto:stroke)
                           (flexi-streams:with-output-to-sequence (out)
                             (vecto:save-png-stream out)))))
                " "))

[luismbo]

Is the intent here to be able to write to the repl buffer only or to other buffers as well?

I have two improvement suggestions. Add a higher-level function to slime-media swank contrib to avoid sending swank messages directly. Use ed-rpc rather than removing the swank side message validation (or add a specific handler, but I think the ed-rpc way is nicer).

[christophejunke]

Is the intent here to be able to write to the repl buffer only or to other buffers as well?

other buffers as well, if possible; there should b an optional buffer parameter I presume.

Add a higher-level function to slime-media swank contrib to avoid sending swank messages directly.

Something like swank:send-image?

Use ed-rpc rather than removing the swank side message validation (or add a specific handler, but I think the ed-rpc way is nicer).

I don't really know what ed-rpc is so I'll have a look.

Thank you