I think this may be mentioned in another topic, but I believe the image uses Eclipse APIs to generate the image, and there does not exist a jBPM method of accomplishing this. However, when you deploy a process, this image is deployed with the process by default and is available from the database...if that helps you at all.
it is indeed answered multiple times in the forum, but you answer is correct. The GPD uses eclipse api's (more specifically GEF if i'm correct) to generate the images
Could you tell me which table is the image stored? I can't find it.
Thanks very much..
use the jbpm api to retrieve these objects (see the webapp taglib on how it retrieves the image). Do NOT rely on the db yourself