[Re: PICT format]
Dr. P.L. Taylor
ptaylor at hgmp.mrc.ac.uk
Thu Sep 11 15:41:58 EST 1997
In article <3416671B.476B at ibsm.cnrs-mrs.fr>,
Athel <athel at ir2cbm.cnrs-mrs.fr> wrote:
>Can anyone tell me where I can find out how (Macintosh) files in PICT
>format are actually formatted, so that I can write programs that will
>write PICT files that commercial drawing programs will be able to read?
>I am interested in the simplest possible case, i.e. where the picture is
>just a black and white bitmap.
-- d.gilbert--biocomputing--indiana u--bloomington--gilbertd at bio.indiana.edu
>Your choice of a bitmap is not the simplest PICT output -- it
>is kind of tricky. PICT is mostly a vector drawing format,
>like Postscript, and adding bitmaps requires some complex
>compression and bit counting.
Not at all - it could hardly be simpler in fact.
Takes just 3 lines of code:
CopyBits(myBitMap, myBitMap, myBitMap.bounds, myBitMap.bounds,
aPicHandle is a PicHandle which will hold the picture.
What this does is copy the bitmap to itself, while recording the
operation into a picture. You don't have to know anything about
the internal structure of the picture, the toolbox does it all
To save the data in aPicHandle to a file, first write a 512-byte
header consisting of all zeroes, then follow it with the contents
of aPicHandle. FileType should (of course) be 'PICT'.
If you need more details mail me.
Phil Taylor | MRC Reproductive Biology Unit
| Centre for Reproductive Biology
| 37 Chalmers Street
mbplt at seqnet.dl.ac.uk | Edinburgh EH3 9EW
ptaylor at hgmp.mrc.ac.uk | Scotland.
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