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From: seiler@amarna.gsfc.nasa.gov (Ed Seiler)
Newsgroups: comp.sys.mac.programmer
Subject: Need help creating a Quickdraw picture
Message-ID: <2205@dftsrv.gsfc.nasa.gov>
Date: 1 Jun 90 04:57:03 GMT
Sender: news@dftsrv.gsfc.nasa.gov
Reply-To: seiler@amarna.gsfc.nasa.gov
Organization: NASA Goddard Space Flight Center - Greenbelt, MD, USA
Lines: 24
News-Software: VAX/VMS VNEWS 1.3-4

I am trying to start with a raster image that I can successfully display in a
window via CopyBits, and make it into a QuickDraw picture. Here's the pertinent
code I am trying with:

picHndl = OpenPicture(&(windPtr->portRect));
CopyBits(&(windPtr->portBits), &(windPtr->portBits),
         &(windPtr->portRect), &(windPtr->portRect), srcCopy, NULL);
ClosePicture();

where picHndl is a PicHandle, and windPtr is a pointer to a window where the
image has already been successfully displayed. It seems that the picture I get
as a result starts off with the usual version opcode, version number, etc.,
but then I get an end-of-picture opcode without any of the copybits opcodes.
What am I missing? BTW, the clip region was set previously via
ClipRect(&(windPtr->portRect)); 

I am doing this using THINK C 3.01 as part of an XCMD for HyperCard.

Edward Seiler                           seiler@dftnic.gsfc.nasa.gov
Mail Code 635                           seiler@chrpserv.gsfc.nasa.gov
Goddard Space Flight Center             (301) 286-9421
Greenbelt, MD 20771

"Against stupidity, the gods themselves contend in vain"