Graham Samuel wrote: > However Richard your other point: > >> The rect option can be useful at times, but since v2.7 we've had a >> much easier and more robust method of exporting images of objects >> by specifying the object itself rather than a rect: >> >> import snapshot from img "MyImage" >> >> The object needn't be an image; it can be anything other than a stack >> (referencing the card will work for those), even groups. >> >> The big difference is how the image is generated: >> >> Using the rect option cips a portion of the display buffer, so if >> your image is out of bounds there won't be anything to get. >> >> But using an object reference causes the engine to render the object >> into a private buffer for you, much like it would do when rendering >> the image on a card, and then hands that buffer back to you in the >> resulting image. ... > Is not so easy to follow if you're trying to build up a composite > image: say for the sake of argument one has a picture (an image) > occupying some part of a card, and one imposes on top of it another > image, with the intention of snapshotting the combined image so as to > create a new picture that can be exported: it might be a jpg of a > membership card with the member's picture imposed on it, or something > like that. Then if I import a snapshot of my background image (the > card design), won't my foreground image (the member's picture) be > ignored? That's how I read the docs - so what I did in the end was to > use a rect based on the background image, something like: > > import snapshot from rect (the rect of of img "MembershipCard") > > This worked, but it appeared to me that I had to have a window (card, > stack) as big as the whole background image if nothing is to be > clipped, which was inconvenient.
If you can put the objects you want into a group, this needn't affect anything in your user experience and requires only small changes to your script, but would let you use the robust one-liner to get the snapshot of the group image even if outside of the clipping region of the window:
import snapshot from grp "MyCompositeThang" -- Richard Gaskin Fourth World Revolution training and consulting: http://www.fourthworld.com Webzine for Rev developers: http://www.revjournal.com _______________________________________________ use-revolution mailing list [email protected] Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution
