[SDL] Re: slooow

Pierre Phaneuf pp at ludusdesign.com
Thu Apr 13 06:54:03 PDT 2000


Mattias.Blomqvist at nokia.com wrote:

> > That seems very wrong.  What depth is your display set to?
> > SDL_BlitSurface() shouldn't take 50 ms for even a 1024x768 blit, since
> > it's using inline assembly version of memcpy(), unless it's doing a
> > complicated unoptimized conversion blit (which almost never happens)
> 
> Depth is 32.

Just FYI, as this is a programming forum and this is an often confused
thing: in this case, the color depth is 24 (the number of bits actually
used) and the bits per pixel is 32 (the number of bits a single pixel
occupies in the frame buffer memory).

Color depth <= bits per pixel, all the time. There are some uncommon
video boards that can do a 30 bits color depth, apparently (according to
Dirk Hohndel).

-- 
Pierre Phaneuf
http://ludusdesign.com/



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