David Higginbotham (dhigginb++at++motown.lmco.com)
Mon, 6 Jan 1997 18:00:09 -0500
This isn't directly a Performer question, it pertains to the
OpenGL feedback mode...
We'd like to use feedback mode to support hardcopy by
obtaining the graphic primitives via feedback and submitting
the approprate printer commands (via PostScript or HGPL).
When a feedback buffer becomes full rendering continues and
only the data which initially fit into the buffer is
available. We could re-render the items which didn't make it
into the feedback buffer, but determining where we were in the
render process when the buffer became full is prohibitively
difficult.
What would really help is immediate notification when the
feedback buffer becomes full. We could dump the buffer to
hardcopy then resume with an emptied buffer.
Does anyone know if an immediate "buffer-full" notification
mechanism exists; for example a callback or interrupt? Your
help is appreciated!
Dave
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