Re: EXIF support in PNG

On 2 January 2017 at 21:47, Glenn Randers-Pehrson wrote:
> Based on this, perhaps we should go ahead and do it the same as
> iCCP: only define a compression_method byte with only "zlib/deflate"
> being valid.  Camera builders can do what you suggested, send
> deflate-encoded but uncompressed data.  I think this would actually
> help with uptake of PNG+EXIF+iCCP, being friendly to both
> encoders (fast and simple) and decoders (no "uncompressed"
> variant except via deflate-encoding, which needs no special
> handling by the decoder).

Ok. The more I think about it, the more it sounds like a good idea.

Does anybody disagree?

> This "deflate-encoded uncompressed" data doesn't need to
> be mentioned in the spec but should probably appear in
> the "rationale" section, or perhaps in the middle of Section 5,
> Deflate/Inflate Compression (or Section 10.1 of the ISO version)

I agree to this one, also.

Sincerely,
Cosmin

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