Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: hsc@vuse.vanderbilt.edu (Hsuan Chang)
Newsgroups: comp.sys.sun
Subject: Re: How to save raster to file from canvas
Keywords: Windows
Message-ID: <8903100548.AA01275@ip3>
Date: 23 Mar 89 10:23:10 GMT
Sender: usenet@rice.edu
Organization: Sun-Spots
Lines: 16
Approved: Sun-Spots@rice.edu
Original-Date: Thu, 9 Mar 89 23:48:49 CST
X-Sun-Spots-Digest: Volume 7, Issue 207, message 10 of 15

>I'd like some advice with what seems like a simple idea.  Given a canvas
>with its pixwin, how can I just get at the raw bits of the image so as to
>save it to a disk file and later reload it into the same pixwin?  Note
>that the rectangle size and shape will not change.

Well, you might want to use the pixrect substructure of the pixwin
directly.  It's accessable via pw->pw_prretained, which is a pointer to a
pixrect structure.  It has everything that you have on the canvas.  You
can then go in to access the raw data part (one dimensional array of type
*short*, each holding two pixels of 8 bits each).

Hope this helps.

Hsuan Chang               hsc@vuse.vanderbilt.edu
Image Processing Lab, Computer Science Department
Vanderbilt University, Nashville, Tn 37235