Re: [media-types] image/webp rfc review

[Paul Libbrecht <[e-mail]>]

Hello James,

On 4 May 2021, at 2:33, James Zern wrote:

>> com.google.webp sounds to be an Apple Uniform Type Identifier
>> <https://developer.apple.com/library/archive/documentation/Miscellaneous/Reference/UTIRef/> 
>> .
>> Is that correct?
>>
> Yes. I found that when looking for something as a replacement for the
> deprecated Macintosh code as you mention [3]. I notice now that its 
> value
> is 'org.webmproject.webp' not 'com.google.webp', however.


Fantastic.

>>    - Macintosh Uniform Type Identifier: com.google.webp conforms to
>>    public.image and to public.data.
>>
>>
> I think mentioning the direct relationship to public.image may be best
> given you can follow it upwards past public.data. And maybe 'Apple 
> Uniform
> Type Identifier' would be more appropriate now.

Excellent and a very good point of changing Macintosh to Apple.

>>    - Windows Clipboard Flavour Name: WebP
>>
> I didn't see a registered reference for a standard clipboard format, 
> but
> GDI was updated to support the format with the ImageFormatWEBP GUID 
> [4] .

I asked the person I know has been working close to that for Math and he 
indicated that GDI does not seem to contain clipboard

https://docs.microsoft.com/en-us/windows/win32/dataxchg/standard-clipboard-formats 
would be the list of standard clipboard types. And webP is not inside 
there.
I also do not find it at [this codeproject 
page](https://www.codeproject.com/reference/1091137/windows-clipboard-formats).

 From searching around about GDI and clipboard, it seems that the only 
way to copy with a GDI bitmap is to transfer it as a buffer. I would 
suspect, that it does not preserve the WebP characteristics for which 
you would need to write to a stream of bytes. All examples I found only 
copy BMP.

Thanks

Paul