nanogui: How pixmaps will work
Subject:
RE: How pixmaps will work
From:
Greg Haerr ####@####.####
Date:
15 Oct 1999 19:16:51 -0000
Message-Id: <796896539E6CD311B0E70060083DFEFB033E0E@NBA-SLAM.CenSoft.COM>
: I was referring more to the time/space tradeoff. Keeping bitmaps
offscreen
: will require more memory, doing redraws will require more CPUs. This
: decision is more important in embedded systems than in larger machines.
In both the X and MSWindows models, there are drawing methods that
allow either way to be used by the application programmer. That's exactly
the point, in that a programmer can pick which method they prefer. Now,
in some situations, an offscreen draw is required to prevent flicker. Also,
there are cases when a window wants to have "savebits" for the its'
contents,
maintained without the need to generate paint/expose events. At this point,
I am implementing just the base level offscreen draw capability, which will
be required no matter which direction the engine or api's go.
Greg
