glMinmax

dror-ai · February 11, 2002, 9:39pm

Hi,

I’m using glMinmax function with Nvidia GeForce3 ti 200.
The performance of glCopyPixels is very slow enabeling this
feature (GL_MINMAX). Can anybody knows how to accelerate it?

Is GL_ARB_imaging extension is implemented in hardware or in
software?
Is anybody knows any other fast method to grab pixels with
specific color from a buffer without reading the whole
buffer?

Thanks,

Dror

davepermen · February 12, 2002, 9:39am

arb_imaging is software

zed · February 12, 2002, 11:30am

minmax looks like being done in hardware on my gf2mx unlike other parts of the arb_imaging subset eg convultion or colour matrix