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Date: Mon, 15 Oct 2018 08:20:10 -0500 (CDT)
From: Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
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Cc: tiff@lists.maptools.org
Subject: Re: [Tiff] Zstd and WebP compression in TIFF
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On Mon, 15 Oct 2018, Phil Harvey wrote:

>> On Sun, 14 Oct 2018 at 10:50:11, Bob Friesenhahn wrote:
>>
>> The next libtiff release will support Zstd and WebP compression
>> options.
>
> Hi Bob,
>
> Could you tell me the value of the Compression tag (0x0103) for these formats?

This is what tiff.h has (decimal):

#define     COMPRESSION_ZSTD            34926
#define     COMPRESSION_WEBP            34927

If these conflict with a previous official allocation from Adobe, this 
would be a good time to provide evidence of that (prior to the next 
libtiff release when they are introduced).

There are some other tags allocated in support of these compression 
formats:

#define TIFFTAG_WEBP_LEVEL              65568
#define TIFFTAG_WEBP_LOSSLESS           65569
#define TIFFTAG_ZSTD_LEVEL              65564

Bob
-- 
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
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