On 22-Jun-10, at 12:28 PM, Michael Ash wrote:
On Tue, Jun 22, 2010 at 9:25 AM, Ben Haller
<bhcocoa...@sticksoftware.com> wrote:
It's a little weird because this method gets called sometimes on a
view
that is not yet installed in a window, so I just make a window then
and
there. (This is run in a headless command-line app, I ought to
mention.)
And yes, I don't bother cleaning up the window and such; right
after this
image writes out, the task exits, so cleanup doesn't matter. Note
that I am
sure the rendering is in fact complete; I see the window flash
onscreen, and
it has everything in it. (I can also run my app in a GUI mode, and
all the
rendering looks right then.)
I don't have an answer to your question, but you might consider
switching to offline rendering for the command-line mode so that you
don't have to mess around with windows and such. You can use
-[NSOpenGLContext setOffScreen:width:height:rowbytes:] to point it
into your own pixel buffer, thus eliminating the need for glReadPixels
completely. Who knows, it might even fix your problem too....
This sounds like an excellent idea. I'll check it out. Thanks!
Ben Haller
McGill University
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