Yesterday I have finally merged the linear_gamma branch into the stable one. This means that all recent developments will be incorporated in the packages provided by PPAs, AUR and the like. From now on, the linear_gamma branch will not be further updated.
The merged changes are focusing mainly on the accurate processing of RGB images in linear gamma encoding, as well as floating-point HDR images. Clipping of channel values has been avoided wherever possible, and new tools like the tone mapping curves have been introduced to provide some simple highlights compression for HDR images.
Another important change is the support for DCP profiles in the RAW development module. Such profiles allow, among other things, to approximately match the vendor-specific look of in-camera Jpegs (by using for example those included in the free Adobe DNG converter package).
Updated binary packages for Linux (in AppImage format), OSX and Windows 64bits are automatically created and made available here.
Thanks for making this important development, it will help not dealing with two separate branches.
So far the only difficulty I have is backward compatibility for those images I processed in the stable branch where I went straight to lab colour space in the initial raw development. These now produce a an incorrectly coloured image. This was the same for the previous linear gamma branch but I did not get round to raising the issue (sorry). I can get round it by introducing an RGB colour space before changing to lab.
You are absolutely right! Thatās a bug I will probably fix within a couple of days. Apart from that, backwards compatibility should be fully guarantee.
Using the stable branch (just built) I opened an image in the LAB color space (from Lindbloomās Profile Evaluation set - Welcome to Bruce Lindbloom's Web Site). The image just looks solid black, was opened āas ifā it were sRGB with no profile. Assigning a LAB profile from disk didnāt make any difference. Krita opens the same image as a LAB image and it looks correct, so Iām guessing there is no problem with the image file itself.
The packages from today should completely solve the issue with opening old .pfi files with straight conversions to Lab colorspaceā¦ please let me know if this is still not fixed for you, or if you still experience other backward compatibility issuesā¦
Just checked again and whilst there are appimage and windows versions dated 29th there is no OS X version. The one dated 28th does not include the fix I presume as it does not open the direct to Lab files correctly.
I donāt know if you prefer issues reported via github or here, butā¦ I just tried the latest appimage of PhotoFlow (./PhotoFlow-20171129_0741-git-stable-070c6d3e7be6e654b13c83e980bb5c2213742b7f.glibc2.17-dbg.glibc2.17-x86_64.AppImage) and I get a segfault if I try to set a custom DCP profile in the RAW developer module. The crash happens as soon as I select āDCP from diskāā¦
