On 02/25/2011 03:15 AM, Matteo Sisti Sette wrote:
On 02/25/2011 02:41 AM, chris clepper wrote:
Just out of curiosity, who is responsible for determining the color space used by default?Myself and Jamie Tittle. The speed difference between YUV and RGBA is massive since all video is the former natively.
:D Hahahha
I meant which object. I mean, if it is pix_video who "decides" which color space to use (as opposed to the OS or somebody else outside GEM) then I guess the same color space could be used by default in all platforms.
the source is responsible for choosing the default colorspace, in your case [pix_video]
Or is there a particular reason to prefer rgba by default on linux?
there are several:
- legacy
- unlike on OSX, there is no direct support for YUV-textures in openGL
on linux & w32; which means that the conversion has to be done on the CPU at some stage anyhow
- pix-fx plugins (FreeFrame, frei0r) usually expect 32bit pixels, which
makes the YUV-speedup void if you want to use these.
I think all unnecessary differences among platform should be avoided even in default values (otherwise one is obliged to set everything explicitely)...
in many cases (e.g. when not using alpha) you won't (or rather: should not) notice a difference.
using [pix_rgba] with pixes that are already in RGBA space, should have virtually no (well, only a very small) overhead.
i suggest making things explicit whenever you need them
gfmasdr IOhannes