.basis Format Forwards and Backwards Compatibility

.basis baseline file format forward and backward compatibility

Short form: Old transcoders will always be able to read baseline compressed texture data written by new encoders. And new transcoders will always still be able to read old .basis files generated by old encoders.

We have no intentions of changing the baseline file format (i.e. the file format written by this encoder), apart from critical bug fixes. We will be extending the format in the future to add features to the system, but old transcoders will still be able to transcode baseline texture data from .basis files written using new transcoders. .basis files are intended for very wide distribution of compressed texture data, like .jpeg or .png, so backwards and forwards compatibility is critical.

So if you compile and ship the transcoder into an application today, we are making a guarantee to you that this transcoder will stay relevant/usable even as we enhance the system. To do this, the file format has the ability to be extended.

Note: The one exception to this promise are Texture Video .basis files, which we will be enhancing in the future.