glDrawPixels speed.

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Steve Baker (steve++at++mred.bgm.link.com)
Fri, 31 Jan 97 11:56:59 -0500

Is there some trick to getting fast 'glDrawPixels'? I'm
trying to dump a 640x480 chunk of image data from main
memory into the frame buffer, using something like:

    glDrawPixels ( WIDTH, HEIGHT, GL_RGB, GL_UNSIGNED_BYTE, buff ) ;

On infinite reality (2xRM, R10k CPU's) I'm seeing ~12Mbytes per second
and on RE2 (2xRM R4400 CPU's) I'm getting ~7Mbytes per second.

I recollect hearing figure nearer 100 to 200Mbytes/sec on the iR - am
I mistaken - or is there something wrong here?

I get better rates than this on my PC at home (admittedly not when using GL)!

Steve Baker 817-619-1361 (Vox-Lab)
Hughes Training Inc. 817-619-8776 (Vox-Office/Vox-Mail)
2200 Arlington Downs Road 817-619-4028 (Fax)
Arlington, Texas. TX 76005-6171 Steve++at++MrEd.bgm.link.com (eMail)
http://www.hti.com (external) http://MrEd.bgm.link.com/staff/steve (intranet)
                                http://web2.airmail.net/sjbaker1 (external)

"You can't destroy the Earth - that's where I keep all my stuff!" - The Tick.

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