gsapi_set_stdio() and -OutputFile=-

HI,

I'm the developer of python-ghostscript, an interface to use the
ghostscript api from Python. ATM I try to complete a test-suite. And I'm
failing to redirect stdout using gsapi_set_stdIO(). Unfortunatly
gsapi_set_stdIo is not well documented.

The output-device I'm using is bmp16.

If passing -OutputFile=-, the image data is written to the stdout
instead of being passed to the stdout-function I've set with
gsapi_set_stdio().

And when leaving -Outputfile away, I get the error:
   GPL Ghostscript 9.14: Could not open the file .
   GPL Ghostscript 9.14: Unrecoverable error, exit code 1


On IRC, Robin Watts already answered:

> That doesn't entirely surprise me.

> This is *not* my area really, but I thought that the purpose of the
stdout redirection was so you could redirect the backchannel stuff from
postscript.

> When you use -OutputFile=- that's an instruction to the device, so a
different kettle of monkeys.


So is there some way to make the bmp16-device to use the stdout_fn?
Or which other device should I use?
If this does not help, I'd need some other test, eg. a small postscript
file writing "Hello World" to stdout. Any idea for this?


-- 
Regards
Hartmut Goebel

| Hartmut Goebel          | [email protected]               |
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