Support HDR

[muukii]

one of the obvious HDR images for testing
https://share.icloud.com/photos/0e9M35xLvJC2mv5cNfwRswR6g

[ntnmrndn]

Since most backends won't support HDR, maybe we should make it a configuration option so that it's more WYSIWYG

[ntnmrndn]

@muukii Sorry, I'm late !
I'm not sure we want to expand to HDR without explicit user support: if their pipeline does not supports HDR, it's better to use only SDR

[muukii]

@ntnmrndn
right. As a photo editor, the user can always switch using HDR or SDR. like Photomator and Lightroom.