nanogui: Clearing a certain area of a window
Subject:
Re: [nanogui] Clearing a certain area of a window
From:
"Greg Haerr" ####@####.####
Date:
1 Oct 2005 01:25:31 +0100
Message-Id: <124901c5c61c$dc611120$6401a8c0@winXP>
: Is it possible to clear only a certain rectangular area of a window
: instead of having to use GrClearWindow()? I have used GrFillRect() when
: the background is solid,
GrClearWindow will clear just a portion of a window, and that should
be the best choice, if the application never drew the window in the
first place. If the application used GrFillRect, then that should be
used to repaint.
: but what about when the background is a pixmap,
: using GrSetBackgroundPixmap()?
GrClearWindow should cause a repaint event such that the
server executes the same code that drew the background pixmap
in the first place, tiled, stretched, etc.
:
: You could GrCopyArea() from the original pixmap to the window, but what
: is the background is tiled, stretched, etc?
No sense in duplicating server code, IMO.
:
: Be whole lot quicker if it's a small area compared to the entire window.
: Especially on a several 100Mhz embedded processor.
Are you saying that GrClearWindow doesn't work, or is just
slow?
Regards,
Greg
