Useful Modules/Classes in GIMP 3.0+

Here’s a guide to the modules you’re likely to need.

Online documentation for our libraries can be found at the 3.0 API reference page.

You can also get some information in GIMP’s Python console with help(module) or help(object), and you can get a list of functions with dir(object).

Gimp

The base module: almost everything is under Gimp.

Gimp.Image

The image object.

Some operations that used to be PDB calls, like

pdb.gimp_selection_layer_alpha(layer)

are now in the Image object, e.g.

img.select_item(Gimp.ChannelOps.REPLACE, layer)

Gimp.Layer

The layer object.

fog = Gimp.Layer.new(image, name,
                     drawable.width(), drawable.height(), type, opacity,
                     Gimp.LayerMode.NORMAL)

Gimp.Selection

Selection operations that used to be in the PDB, e.g.

pdb.gimp_selection_none(img)

are now in the Gimp.Selection module, e.g.

Gimp.Selection.none(img)

Gimp.ImageType

A home for image types like RGBA, GRAY, etc:

Gimp.ImageType.RGBA_IMAGE

Gimp.FillType

e.g. Gimp.FillType.TRANSPARENT, Gimp.FillType.BACKGROUND

Gimp.ChannelOps

The old channel op definitions in the gimpfu module, like

CHANNEL_OP_REPLACE

are now in their own module:

Gimp.ChannelOps.REPLACE

Gegl.Color

In legacy plug-ins you could pass a simple list of integers, like (0, 0, 0). In 3.0+, create a Gegl.Color object:

c = Gegl.Color.new("black")
c.set_rgba(0.94, 0.71, 0.27, 1.0)