🚀 go-pugleaf

In article <1992Sep1.033025.7164@news.media.mit.edu> mike@media-lab.mit.edu writes:
>Has anyone got a convenient and efficient way to get at
>the bits in grabbed video frames (on a NeXT Dimension under 3.0)?
>
>The problem is this: when you grab the frame, you get an
>image with representation NXCachedImageRep, which presumably
>somewhere has a pointer to the raw image in NeXTDimension memory.
>There are no methods to directly read this data, although you
>can draw it out to another view.  I tried compositing the
>NXCachedImageRep image into a newly allocated image with
>an NXBitmapImageRep (a TIFF), but the latter was converted
>to an NXCachedImageRep!

This is appkit.732 in NeXTanswers...  send a setDataRetained:YES to
the NXImage to prevent it from converting the NXBitmapImageRep to a
NXCachedImageRep...

>What I would like to do is simply get my hands on the pixel array
>that underlies the NXCachedImageRep of a grabbed frame,
>without copying and converting the whole frame.


Try to use either NXReadBitmap() or NXBitmapImageRep's
initData:fromRect: method (NeXT prefers NXBitmapImageRep).


andrew
-- 
andrew@cubetech.com     | "We shall not cease from exploration
Andrew Loewenstern      |  And the end of our exploring
Cube Technologies, Inc. |  Will be to arrive where we started
                        |  And know the place for the first time." -T.S. Eliot