Michael Droettboom wrote: > I think I'm a little confused by the question. From the Python > perspective, everything in the Agg backend takes floats. Agg > actually has color types for both floating point and 8-bit-per-plane > colors, though obviously it's converted to 8-bit-per-plane > eventually. But, of course, that is done on the fly without much > memory copying, so I'm quite surprised that the speed up is > significant... Where exactly is this conversion happening, and how > are you now avoiding it? (Is this in code that is not checked in, > perhaps?)
I was referring to _image.cpp and the quadmesh code in _backend_agg.cpp. Both work directly with agg::rgba8, and can benefit from doing a color table lookup directly in 8-bit space instead of using floats and then converting. Eric > > As for the other backends, it's a mixed bag. PDF, PS and Cairo want > floats, SVG wants ints. Personally, I just *like* floats better, as > it feels more future proof, even though most people aren't using the > extra color resolution now. (Of course, if your plot relies on > high-resolution color, you probably need to rethink your plot > anyway... ;) > > Cheers, Mike ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
