Interesting approach. Includes compression. And is platform neutral.
> What I do is simply capture the strokes (rather than the bitmap) and store
> these in my database for the signature (yes it is variably length, but so
is
> everythig else in that particular database). It is just as fast since yo0u
> are normally drawing only one stoke. For the formUpdate case or displaying
> an old signature, you have to redraw all the strokes but that is not a
> significant speed problem. I actually have my own version of winDrawLine
> (there is at least one bug with using clipping, at least in older OS
> versions) and draw the stokes on an 'internal' bitmap and then just draw
the
> bitmap on the screen. By porting my code for winDrawLine to my conduit I
can
> have the conduit produce a windows bitmap instead of a palm bitmap to be
> saved on the PC
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Philip
> Sheard
> Sent: Tuesday, March 27, 2001 17:18
> To: Palm Developer Forum
> Subject: Re: to anyone who has done signature++ on OS3.5
>
>
> > To the many people who are having huge problems getting signature
> > capture code working on both OSes before 3.5 and OS 3.5 and later.
> >
> > Why haven't you refactored the problem? If the issue is getting data
> > off the screen, why not change the problem? A signature capture program
> > boils down to
> >
> > 1) capture user pen strokes
> > 2) show the strokes to the user
> > 3) save the strokes for later use
> >
> > This begs for using backing store code, where the pen strokes modify an
> > offscreen bitmap, and the bitmap is copied back to the main screen after
> > each penMove. Then, when you're finished, you have a bitmap all ready
> > for you to use and you don't have to deal with grabbing out of screen
> > memory.
>
> How would you apply the pen strokes to your off screen bitmap? If you use
a
> window, then you face the same problems of version dependency.
>
>
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