Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!mailrus!bbn!metasoft!rln
From: rln@metasoft.UUCP (Roberta Norin)
Newsgroups: comp.sys.mac.programmer
Subject: Converting PICT's
Message-ID: <1082@metasoft.UUCP>
Date: 8 Feb 90 23:42:19 GMT
Organization: Meta Software Corporation, Cambridge MA
Lines: 32

I am trying to read the contents of a PICT and convert the data to my
own format. I have noticed other applications doing this. In my first
attempt I just used the documentation on PICT opcodes and processed
through pointer to the picture data.

This worked but documentation seems to indicate that you should not do
this.  So I installed my own StdPutPic procedure, opened a new
picture, drew the picture, and then closed and killed the new picture.
Is this a legitimate approach?

The Mac repeatedly calls my StdPutPic procedure with a pointer to the
data and a count. For the the most part it sends me the code one time
and the data the next time.

However, this is not always the case. For the ShortLine opcode, for
example, my procedure gets called with the code first, then with a
point, then with a vertical offset, and then with a horizontal offset.

For the Version opcode my routine is called with the code and the
data.

I am having difficulty writing a StdPutPic procedure that handles all
these cases. If anyone has any insights, suggestions, or references,
please e-mail them to me.



			Thanks,

			Roberta Norin

			rln%metasoft@bbn.com