[softwarelist] Re: OvPro and pictures -- Artworks
- From: David Pilling <flist@xxxxxxxxxxxxxxxxxxx>
- To: davidpilling@xxxxxxxxxxxxx
- Date: Mon, 27 Feb 2012 12:21:21 +0000
Hi,
In message <68bc066852.jim@xxxxxxxxxxxxxxxxxxxx>, Jim Nagel
<opro@xxxxxxxxxxxxxxxx> writes
When OPro receives a sprite it wraps it into a drawfile for this
reason, and thus is able to display resolution info for the sprite in
the OPro graphics dialogues.
Oh no it does not. Wrapping sprites in Draw files was a Computer
Concepts innovation.
I believe a sprite is a sprite. Put a sprite in, get a sprite out. [1]
Old fashioned sprites come in 45, 90 and 180dpi fixed resolutions. The
new ones that came in with the RISC PC have the potential for variable
resolution. Not sure if anyone uses that or if software would be happy
with odd values.
Curious Q: if the sprite arrives wrapped in an Artworks file instead
of a drawfile, does OPro also see the resolution info? What's the
mechanism involved?
Yes if a sprite came in an ArtWorks file the resolution info would be
preserved. The mechanism is that a vector file (Draw or AW) says "this
bitmap is 6 inches by 4 inches".
All is obvious after that, because you know how many pixels, and you
know the linear dimensions, so you can calculate the resolution in dots
per inch.
[1] However internally OP does make sprites look like Draw files
because it has to be able to render Draw files with sprites in (same
applies to JPEGs).
--
David Pilling
email: david@xxxxxxxxxxxxxxxxxxx
web: http://www.davidpilling.net
post: David Pilling, P.O. Box 22, Thornton-Cleveleys, Blackpool. FY5 1LR. UK
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