Senin, 30 September 2013

Is there a Linux printer driver that can print to JPEGs, one per page?

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I know there are some 'virtual printer driver' programs that look like another named printer and can print web-pages, word-processor documents or anything to PDF files instead of paper, but do you know one that can print directly to a set of JPEG images of the pages, one JPEG per page?

I'm experimenting with displaying text/web pages on a digital photo frame, JPEG CDs or flash drive in a DVD Player and a few other things.



Answer
You can print to a PostScript file, then use Ghostscript (gs executable) to convert to JPEG:

gs -dNOPAUSE -dBATCH -sDEVICE=jpeg -sOutputFile=file.jpg file.ps

Various additional options will let you set the resolution and other options. You can also do this to various other formats, like PNG or TIFF.

What kind of operating systems are used in the following devices?




sapphire


- calculators (particularly SHARP)
- Sony DVD players
- ovens

I read that microwaves don't need operating systems because they have to perform only one set of tasks and have straightforward input. That's why they run a single hard-wired program. Are ovens the same?

Thank you.
I'm not talking about Windows or Linux or anything. e.g. sony Ericsson phones have their own operating system: Symbian. That's what I mean....do these devices have their own OS?



Answer
All this things run on stand alone platforms. In other words don't think you can hook anything up to a windows, mac, or linux and think you'll be able to read anything. They are specifically programed with software specific to the device and/or from the manufacturer.




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