Anyone else find glPixelZoom(1,-1) reeeeealy slow?
I'm finding glPixelZoom(1,-1) to be incredible slow under 4192.
Anyone else experiencing this?
(setup 1:1 pixel->vertex correspondence for the proj matrix, etc)
That takes nealy half a second to complete!
From bad to worse
Hmm, it wasn't any better under 3123.
On even further inspection,
glCopyPixels is DOG slow with glPixelZoom(1,-1),
but glDrawPixels is fast as ever.
Hey Nvidia- FIX IT! Arg! This one should really be easy!
The following should -not- run with software fallback:
// assume glOrtho set up for 720,486.
glXMakeContextCurrent(display,writeDrawable,readDr awable, glxcontext );
// where writeDrawable!=readDrawable, but you should be able to fast-blit vertical-flipped in the same drawable
As it stands, there is currently no easy way to blit in video (right-side-up), render on top of it, and blit it out (upside-down).
Fixing glCopyPixels would make it possible to do this at framerate (29.97 fps) instead of at 2 fps.
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