On Tue, 14 Dec 2004, Johannes M Zmoelnig wrote:
while pixes are the bridge to pdp, i guess vertex-arrays might be the bridge to GridFlow.
There ought to be two bridges to gridflow, one for pixes and one for vertex-arrays. Well at least I don't know why there shouldn't be one for pixes... At least greyscale and rgb would be supported.
For the yuv422 case, it could be mapped to a grid of size (height,width,2), where the two channels are Y and UV. The UV plane has U on even-numbered columns and V on odd-numbered columns. That's afaict the yuv422 model i will use if i ever need to.
Another possible mapping for yuv422 could be to duplicate the UV channels to make it yuv444; then that maps directly to something that can be used most naturally in GridFlow (i have already used yuv-based effects in practice in GF).
The yuv444 i am using is unsigned, but frankly, most of the time I translate to u8:i8:i8 (y unsigned, uv signed) because then the transform is homogeneous linear and so the greys are at the origin of the uv plane. So in the end i'd support both.
But I think RGB & Greyscale will be an excellent start...
_____________________________________________________________________ Mathieu Bouchard -=- Montréal QC Canada -=- http://artengine.ca/matju