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[REBOL] Re: Printing and Rebol

From: g:santilli:tiscalinet:it at: 14-Jul-2001 15:14

Hello Brett! On 14-Lug-01, you wrote: BH> If you build a "low-level" dialect for outputting PDF then BH> later more abstract dialects can be built on top of it to [...] pdf-maker.r already has two levels. One is the PDF lowlevel format; as long as you know PDF and a couple of things about the lowlevel dialect you can build any PDF file, with the code handling stream sizes and the xref table automatically. The other (higher) level is that of LAYOUT-PDF. This is what you'll probably use if you're writing your own dialect but don't want to bother about reading the whole PDF specification. Of course, stacking up too many layers affects performance and introduces subtle bugs. I think, however, that <= 3 layers is still acceptable if doing without would be too much of a pain. BH> All of these could be simpler if leveraging off your lower BH> level dialect. The lower level dialect remaining unconcerned BH> by the final user's requirements for output. I still think no-one would need to go that low-level, unless you're going to do something very special; but the lower level is accessible anyway --- it just isn't documented yet. :) Regards, Gabriele. -- Gabriele Santilli <[giesse--writeme--com]> - Amigan - REBOL programmer Amiga Group Italia sez. L'Aquila --