Imagination PowerVR SDK Blog

PVRTexLib DXT Compression on OSX


#1

Hi Tobias,


Earlier versions of PVRTexLib didn’t support compressing to DXT on OSX. Is that still the case with the new library? I am getting failures which I’m assuming is this same issue. The defines for transcoding to DXT targets are no ifdef’ed out in the new version so I had hope that this was the case.

Is it Windows only because PVRTexLib is using the DirectX SDK to do the encoding?

Thanks!
– Joe

#2


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Hi Joe,



This is still the case I'm afraid - for legal reasons we had to disallow this
as DXT compression/decompression should only be available on licensed
platforms.



The reason these tokens are not if def'd out is simply because they're in a
public header, and it's perfectly acceptable to handle the texture data on
MacOS, as long as no encoding/decoding is done. Information about the format
needs to be known to work out how big the texture data is for example.



Thanks,



Tobias


#3

Just to be sure that I understand it right. DXT compression wil never be available on MacOSX ?

I was just about to post about the issue but I’m glad I did a quick lookup first.

What about libsquish ? It runs on MacOSX…


#4

Hi Micha,



The issues are more complex than it seems on the face of it - and I can’t really go into the details about these reasons, I’m not a lawyer and can’t comment on legal issues on a public forum - sorry :frowning:



However, I can say that for now, no we won’t support DXTC on MacOS or Linux. It’s something I’m attempting to see if we can support in future, but I can’t enable it unless we get a legal green light on the issue.



Regards,

Tobias