An arbitrary number of masks can be created and are collected into a 'mask manager' on the left hand side of the darkroom UI. There are five mask types available: brush, circle, ellipse, bezier path, and gradient all are resizable, allow fade-out radius for smooth blending and can have their opacity controlled.

Support for drawn masks was added in Darktable version 1.4, allowing application of effects to manually specified areas of an image.

Scripts can be linked to hotkeys or specific events, such as when importing new images. An integrated mover for executing Lua scripts.Support for geographical coordinates labels with the display of photos on the map.Support for shooting directly through the camera.Organize images and search by parameters.More than 30 modules for transformation, color correction, quality improvement and artistic effects.Full implementation of color management.Work in 32-bit float mode on a color channel in CIE LAB space.Non-destructive editing with the XMP change description entry.The program features built-in ICC profiles, GPU acceleration (based on OpenCL), and supports most common image formats. Rather than being immediately applied to raster data of the image, the program keeps the original image data until final rendering at the exporting stage - while parameter adjustments made by a user display in real-time. Darktable involves the concept of non-destructive editing, similar to that of some other raw manipulation software.

Windows photo image darktable download