Dear All, Sorry to pester everyone by bumping this, but I'm sure *somebody* can give me some advice on the topics below!
The original post was as follows:- Dear All, Hi! I have some questions regarding improving the performance of certain graphical tasks. All questions below currently concern *colour* handhelds/OS's only. I know that similar questions have been dealt with before in the archives, but I couldn't find a satisfactory answer... I'm writing an app that would benefit from fast plotting of pixels to windows, and WinDraw/PaintPixel (and it's companion, WinDraw/PaintPixels) are all much too slow. On my Palm IIIc, I used direct bit manipulation of the window memory, getting a performance boost by a factor of 2 - 5 times. I realise, however, that this will not work for all Palm handhelds on the market (and certainly not for those released in the future) so I wondered if they are any libraries available that allowing very fast placing of a coloured pixel into screen memory, which are compatible with all current PalmOS devices? I realise that the direct-screen-writing method is frowned upon, but the API functions are so slow!!! Failing that, is there a way of specifying the masking colour with processes like WinCopyRectangle? What I really would like to do is to copy a portion of a window onto another window, where the copied portion contains the colour white (on PalmIIIc, white has colour index 0). However, it seems that colour index 0 is precisely the colour that is "ignored" (i.e. treated as the mask(?) - is that the correct phrase?) with WinCopyRectangle and WinDrawOperation set to winMask! [Matching colour depths is not an issue here]. Any help with any of these matters would be greatly appreciated. Thanks in advance, Simon St James [EMAIL PROTECTED] Addendum:- Also, can anyone settle this question once and for all (I've heard many conflicting replies!):- Is the preference information for an app (set with PrefSetAppPreferences) deleted when the application is deleted? Is there anyway to modify this? Basically, if anyway can point me towards information about what happens with app preferences on uninstall, that would be very helpful. Cheers again, Simon _________________________________________________________________ Send and receive Hotmail on your mobile device: http://mobile.msn.com -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
