Re: scaling image using rectcopy

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Michael Jones (mtj++at++babar)
Wed, 30 Mar 1994 09:04:12 -0800

On Mar 30, 10:00am, Takeshi Hashimoto wrote:
> Subject: scaling image using rectcopy
:Hi,
: I wrote a program in Performer whose window size is 320x240
:pixel. I want to display it's 320x240 window to NTSC full
:screen by Galileo Video.
:How can I do it?
:
:I tried to scale image after pfDraw ,using rectzoom and rectcopy
:but it didn't work as I want.
:
:in draw process
:DrawFunc( pfChannel *chan, void *data)
: ....
:
: pfDraw();
: afunction(0,AF_ALWAYS);
: viewport(0,639,0,479);
: rectzoom(2.0f,2.0f);
: rectcopy(0,0,319,239,0,0);
:}
:
:Is it wrong?

They way to do this is to simply make the pfPipe's origin and size
match the Galileo Video's expectations. Take the code above out
of the Channel Draw Callback, and simply make the Pipeline
Initialization Callback specify the desired window size and
origin. That's all there should be to it.

-- 


Be seeing you,      mtj++at++sgi.com  415.390.1455  M/S 7L-590
Michael Jones       Silicon Graphics, Advanced Graphics Division
                    2011 N. Shoreline Blvd., Mtn. View, CA 94039-7311

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