On Friday 30 September 2005 21:06, bulia byak wrote:
On 9/30/05, Tom Epperly <tepperly@...1012...> wrote:
I did a little WWW searching, and I see that "PostScript 3 technology delivers support for transparent artwork in PDF 1.4 and 1.5 and support for JPEG 2000 and layers in PDF 1.5." I know Postscript up to level 2, but I can't seem to find any detailed (non-marketing) descriptions of what operators they added in level 3.
Yeah, marketing descriptions are generally misleading, but this one is particularly confusing. I believe what they meant to say is that true transparency is in PDF 1.4+, and that is somehow based on PS3, so by some twist, PS3 can be said to "deliver" it even though it does not support it itself.
Anyway, to get the manual for PS3, google for plrm.pdf. From when I read it, I remember they added some sort of bitmap transparency masks for bitmaps, but not even flat semi-transparency for regular vector objects. Which, to me, means it's almost useless.
The latest PS3, 3017, has a lot more transparency support, possibly even full support. However, when you only support PS3, you then must have a way of converting to level 1 and 2, which isnt hard using ghostscript, but then you also require a decent level of ghostscript.
Craig