nanogui: Offscreen Drawing -- tapping offscreen buffer ?
Subject:
Re: [nanogui] Offscreen Drawing -- tapping offscreen buffer ?
From:
"Greg Haerr" ####@####.####
Date:
18 Nov 2005 04:08:17 +0000
Message-Id: <234301c5ebf5$ab6e61e0$6401a8c0@winXP>
> What exactly is meant by offscreen drawing ?
> My guess was a region in user space which is copied to the
framebuffer(mmap'd).
No, offscreen drawing is drawing, using exactly the same calls
as with a window ID, but instead to a pixmap ID, created with
GrNewPixmap. The bits are drawn "offscreen". Then,
GrCopyArea can be used to copy the bits onscreen to some window.
Regards,
Greg
We are attempting to 'tap' this offscreen buffer and send it to the dsp for
rendering as our host board does not have a display card.
On going thru the code briefly, we found this offscreen buffer is not
'filled'(probbly abstracted by the X library calls). Straight away the
framebuffer is filled with display data.
Any insight on this issue is welcome.
Thank You.
With Regards,
Amareesh Kalra
---------------------------------------------------------------------
To unsubscribe, e-mail: ####@####.####
For additional commands, e-mail: ####@####.####
