darktable is a photography workflow application and RAW developer. It simplifies managing large numbers of RAW photos and their post-production in a non-destructive manner.
emerge --ask media-gfx/darktable
USE flags for media-gfx/darktable A virtual lighttable and darkroom for photographers
||Support color management using x11-misc/colord|
||Add support for CUPS (Common Unix Printing System)|
||Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally|
||Add support for uploading photos to flickr|
||Enable geotagging support|
||Enable support for storing passwords via gnome-keyring|
||Add digital camera support|
||Build and link against GraphicsMagick instead of ImageMagick (might require USE=imagemagick if optional)|
||Support for JPEG 2000, a wavelet-based image compression format|
||Enable encrypted storage of passwords with kde-frameworks/kwallet|
||Add Native Language Support (using gettext - GNU locale utilities)|
||Enable opencl support|
||Support for the OpenEXR graphics file format|
||Build support for the OpenMP (support parallel computing), requires >=sys-devel/gcc-4.2 built with USE="openmp"|
||Triggers paxmarking of main darktable binary|
||Add support for the WebP image format|
Basic settings can be altered in ~/.config/darktable/darktablerc.
The media-gfx/darktable package provides a few additional tools.
Using darktable-cli it is possible to use darktable for a non-interactive batch processing and export.
darktable-cmstest helps debugging color management issues (eg. exported photo colors don't match the darktable's). Also it indicates whether the colord USE flag was enabled.
Darktable with enabled opencl USE flag supports OpenCL-based GPU acceleration. The darktable-cltest utility helps debugging the darktable's setup and OpenCL driver interactions.
In order to improve approximation of camera's built-in JPEG engine with the default RAW processing settings you can use the dt-curve-tool.