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clipboard objects and postscript (unix) [message #13303] Mon, 02 November 1998 00:00 Go to previous message
seanosea is currently offline  seanosea
Messages: 6
Registered: November 1998
Junior Member
Howdy, folks. I'm having difficulties with the Clipboard object in IDL on
unix. This is pretty much my first time posting anywhere; I was so impressed
by the helpfulness here that I decided to try it out.

First, IDL saves to the PostScript "native format" file with a bitmap rather
than a "true" PostScript objecty-sort of "do this, do that" structure. That
is, in a normal PS file, you'll see at some point all the words of text
actually spelt out as "{X} goright {Axis}" or whatever, whereas IDL's PS just
has 1's and 0's.

Is there a way to output a graphics tree in normal non-bitmap PS form? This,
of course, allows for much greater resolution scalability.

Second, supposing there isn't, the simplest X Window clipboard utility,
xclipboard, can't seem to latch on to my attempts to increase the resolution
and dimensions of the clipboard object. Drawing to the clipboard at the
default res of 72dpi and default dim of 640x480 works fine: xclipboard
"converts" it nicely to a PS image with bounding box 640x480, but it's too
low of res for my purposes.

When I increase the res from 72dpi, leaving the dim at the default 640x480,
IDL adjusts the dim to keep res*dim constant. So if I double the res, IDL
halves the dim, leaving the effective resolution (amount of information)
constant. Finally, if I increase both the res and the dim, IDL hangs, and
xclipboard complains "failure to convert clipboard data". When I kill
xclipboard, IDL wakes up.

Is there a way to increase the res, making the file much bigger but the image
more detailed?

I'm working on a SunOS system.

I really appreciate any thoughts.
Thanks,
Sean O'Sea

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