2011/3/14 Rico Schüller kgbricola@web.de:
Yes, it is the shader/effect version. I used the value because I was not able to generate other targets for d3dx9 with the current sdk.
I think a mask for the effect ((tag >> 16) == 0xfeff)) would be fine here. There shouldn't be a huge difference between the versions (tag & 0xffff), but I expect one.
Checking for a specific version should be ok if that's all we support at the moment. But I think something like "d3dx9_effect_version(9, 1)" would be much clearer than 0xfeff0901.