"Tom Warfel" <[EMAIL PROTECTED]> wrote in message news:45137@palm-dev-forum... > > Up until the latest version of the Palm OS Emulator, I've been able to generate > greyscale images on the fly by bit-twiddling in the data of an off-screen > window, then copying from that window to the screen. We're now getting messages > from POSE (and in the 4.0 include files) that this unofficial technique will no > longer be supported on new OS versions. > > On the other hand, drawing a 120x120 image by doing WinSetForeColor(), then > WinDrawPixel(), for each and every of 14,400 pixels is _S_L_O_W_. No real suggestion, but your technique is already liable to fail on real devices. The LCD controller on the IIIc and the Prism has a limited memory bandwidth, and it is possible to write to memory faster than it can handle. When you create an offscreen window, it could be created in additional video memory, which means directly maniuplating the window, even if offscreen, could fail in odd ways. Diamond Jeff had some explorations of this phenomenon back in December that's worth reading. -- Ben Combee, [EMAIL PROTECTED] Techwood Broadcasting Foundation, Austin Bureau -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/tech/support/forums/
