PDA

View Full Version : Windows size in dynamic memory


zhamilton1
01-28-2003, 12:12 PM
Does anyone know how much a window takes in dynamic memory and is there a maximum of windows?

Note that I am talking about off-screen windows and not forms or on-screen windows.

nyrath
01-28-2003, 04:00 PM
I'm not sure.

From Sony Developer's Spotlight (http://www.us.sonypdadev.com/spotlight/index.html)
One "speed bump" that some game developers will undoubtedly run in to is allocating frame buffers. Our first attempt at high-resolution was running in a compatibility mode, where each frame was drawn off screen and then copied to the display. On a 160x160 pixel, 8 bit color device, this is as easy as allocating a 25k buffer. With a 320x320 screen, we clearly need a 100k buffer. Allocating more than 64k on the Palm isn't very easy, and a frame buffer has to be one contiguous chunk of RAM. One solution to this problem is to use FtrPtrNew to allocate a chunk of RAM larger than 64k. We have no idea why, but of all of the memory management functions, this one relaxes the 64k limit in OS 3.5 and above.