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- Path: sparky!uunet!munnari.oz.au!sgiblab!spool.mu.edu!agate!doc.ic.ac.uk!uknet!keele!seq1!gerry
- From: gerry@keele.ac.uk (G.D.Pratt)
- Newsgroups: comp.lang.postscript
- Subject: How to make a PostScript image transparent? - Help!
- Message-ID: <C1IDnt.7pL@gabriel.keele.ac.uk>
- Date: 27 Jan 93 10:40:40 GMT
- Sender: news@gabriel.keele.ac.uk (UseNet News Service)
- Organization: Keele University, England
- Lines: 47
- Nntp-Posting-Host: seq1.cc.keele.ac.uk
- X-Newsreader: TIN [version 1.1 PL6]
-
- Hi,
- I'm taking 2 PostScript files, one created from a Sunrasterfile with
- rastps and the other from pnmtops and cating them together. The first
- is a very light greyscale image and the second is a monochrome image
- with a lot of white. I want the first greyscale image to show thru' the
- white of the second monochrome image but it gets over written.
-
- The code where the first ends and the second starts is like this:-
-
- gsave
- 540.0 810.0 scale
- /s 400 string def
- 400 600 8
- [400 0 0 -600 0 600]
- {currentfile s readhexstring pop} image
-
- image data here...
-
- 797C7E8284898B8D91929496999B9D...........
- grestore
- %!PS-Adobe-2.0 EPSF-2.0
- %%Creator: pnmtops
- %%Title: noname.ps
- %%Pages: 1
- %%BoundingBox: 15 90 597 671
- %%EndComments
-
- Prolog here...
-
- %%EndProlog
- %%Page: 1 1
- gsave
- 15.3 90.5706 translate
- 581.4 580.859 scale
- 1074 1073 1
- [ 1074 0 0 -1073 0 1073 ]
- { picstr readstring }
- image
- 8000f9008000f9008000f9008000f9008000f9008000f9008000f9008000....
-
- Is there something I can put _before_ the second one starts to make it
- transparent? Or some alternative approach perhaps with PBMPLUS. Thanks.
-
- --
- gerry pratt - workstation support programmer - university of keele - ENGLAND
- email: gerry@seq1.keele.ac.uk ( DYNIX? - just say no!! ) tel:UK 0782 583072
- "these opinions are mine, mine, Mine, Mine, MINE......ALL MINE I TELL YOU!!"
-