On 30.09.2010 05:39, bobdobbs wrote: > Hi all. > > I'd like to delete in such a way that transparency remains. > > I've found that this is the default when I'm working on images that I've > created myself. > But if I'm working on an image that I've downloaded or gotten from another > source, I can't predict the behaviour of functions that remove pixels. > > In my immediate case, I've got a icon with a white background. I want to > remove the background. > However, when I try to remove the white pixels, the result is black pixels. > > How can I figure out what the result of deletion operations on pixels will be? > > How can I consistantly remove colour, leaving transparency?
short answer: always add an alpha channel to the layer, either using the layers dialog or via Layers->Transparency->Add Alpha Channel [1]. The alpha channel determines the transparency for each pixel. The absence of an alpha channel means that all pixels are fully opaque and hence they get deleted to background color [2]. regards, peter [1] http://docs.gimp.org/2.6/en/gimp-layer-alpha-add.html [2] http://docs.gimp.org/2.6/en/gimp-image-combining.html#gimp-layer-properties _______________________________________________ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
