On 18/09/2010 00:33, Sven Neumann wrote: > > On Fri, 2010-09-17 at 20:48 +0200, Ofnuts wrote: >> Hello, >> >> I'm writing a plugin that takes a drawable as input for pixel values. >> What kind of BPP can I expect? I'd say 4 and 3 are color layers with and >> without alpha. Will I encounter 2 and 1 for grey-levels with and without >> alpha, too? > > Well, it depends on what your procedure specifies as image types when it > registers. The documentation says: > > image_types is a comma separated list of image types, or actually > drawable types, that this procedure can deal with. Wildcards are > possible here, so you could say "RGB*" instead of "RGB, RGBA" or "*" > for all image types. If the procedure doesn't need an image to run, > use the empty string. > >> I can't find a way to create a layer in grey levels (or to >> change an existing color one to grey levels). Am I overlooking the >> obvious or would that only apply to layer masks? > > Grayscale layers only exist in grayscale images. If you specify "GRAY" > and/or "GRAYA" or "*", then your procedure needs to handle those > drawable types.
I had overlooked the fact that greyscale was an attribute of the image and not the layer. Thanks for the reminder. With that in mind I could perform some more tests with greyscale and it turns out that at least the python interface returns 3 or 4 channels even in greyscale, so everything is OK. Thx for the help. _______________________________________________ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
