Ken Krugler a �crit : > >When running my program on a OS 3.5 IIIc, the map pan feature based on > >WinCopyRectangle (following stylus moves) often crashes with the > >following stack crawl (seen in the CW 8.3 debugger): > > > >MapHandleEvent( EventType* ) > >0x10C55E52( WinCopyRectangle ) > >0x10C4E0D2( BltCopyRectangle ) > >0x10C4E0D2( BltCopyRectangle ) > >0x10C51E32( PrvMisAlignedBackwardInnerBitBlt� ) > > > >What can I do about this (other than telling my user to ditch his IIIc)? > >I never saw this occur on another device, monochrome or color. > > I ran into the same problem with some picture pan code. From an old post... > > At 12:25 PM -0800 2/17/01, Ken Krugler wrote: > >2. When calling WinCopyRectangle(screen, > >off-screen) and the off-screen window uses a > >bitmap without a color table, then Palm OS 3.5 > >will accidentally dispose of the system color > >table, and a subsequent call will die in Poser. > >I think this same situation might occur in the > >inverse case as well. > > The full post is at <http://www.escribe.com/computing/pcpqa/m34989.html> > > I fixed it in my code by making sure the off-screen bitmap had a color table.
In my case, I'm just moving the screen window onto itself, drawing from screen to screen: WinCopyRectangle( NULL, NULL, &bounds, newX - screenX, newY - screenY, winPaint ); How could the screen window not have a color table? -- Luc Le Blanc -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
