Re: DRAFT: eXIf 2017-03-09

On Fri, Mar 10, 2017 at 8:37 AM, Glenn Randers-Pehrson
<[email protected]> wrote:
> That looks scary.  If that's our objective, then OK.
> If our objective is to provide a simple method of preserving
> the Exif profile existing in JPEG files, not so much.

The latter can be achieved with a binary blob of EXIF data.  There's
no need to know what is inside it; the CIPA spec documents that.

The problem I see is that most of the last few weeks discussion have
been about what is *inside* that blob.  The safe/unsafe,
compressed/uncompressed issues are clearly part of PNG, but the
contents of the blob are not.  The last few weeks discussion does not
seem to have achieved anything.

I suggested that "scary" wording because the spec is deep diving into
the structure:

"total length of the Exif data (the sum of the lengths of the Exif
attributes IFD, the GPS IFD, the thumbnail IFD, and the TIFF header) "

John Bowler

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