Hi Eric,
limiting the direct access to known creator/type combinations (e.g.
Foto/Foto) looks to me a sufficient warranty that the format will not
change.
Otherwise I agree with your statement about using API's.
Best regards,
Jan
----- Original Message -----
From: "Eric Lyons" <[EMAIL PROTECTED]>
Newsgroups: palm-dev-forum
To: "Palm Developer Forum" <[email protected]>
Sent: Thursday, August 10, 2006 6:27 PM
Subject: Re: Converting PDB to JPG
> Jan,
>
> Let me rephrase. :)
>
> Palm.* has historically discouraged bypassing the APIs and reading and
> writing its data structures directly. That's why they provide APIs.
Their
> data structures are subject to change between Palm OS revisions and
hardware
> architectures.
>
> I would not recommend non-official methods of reading that file stream PDB
> on the desktop even though the file stream implementation probably hasn't
> changed recently...
>
> Eric Lyons
>
>
> "Jan Slodicka" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> > It is really so that if you can read individual stream records, then it
is
> > enough to skip first 8 By and concatenate the record leftovers.
> > Reading records at the PC side should not be difficult either. They have
> > constant length of 4104 By.
> > Sources of par program can be traced somewhere - they can serve as a
> > guidance to understanding the pdb format.
> >
> > With best regards,
> > Jan Slodicka
> > Resco, Palm Division
> >
> >
> >
> > ----- Original Message -----
> > From: "Eric Lyons" <[EMAIL PROTECTED]>
> > Newsgroups: palm-dev-forum
> > To: "Palm Developer Forum" <[email protected]>
> > Sent: Thursday, August 10, 2006 4:31 PM
> > Subject: Re: Converting PDB to JPG
> >
> >
> >> Daniel,
> >>
> >> This reverse engineering of the file stream format works until the
> > sequence
> >> 0x44 0x42 0x4C 0x4B 0x00 0x00 is image data and not a file stream block
> >> marker.
> >>
> >> In other words, this reverse engineeering of the file stream format
isn't
> >> reliable...
> >>
> >> Eric Lyons
> >>
> >>
> >>
> >> "Daniel Brocco" <[EMAIL PROTECTED]> wrote in message
> >> news:[EMAIL PROTECTED]
> >> It's strange the way Palm desktop works.. sometimes it put the photos
> > into
> >> "My Images" folder, sometimes not.
> >> But it puts the photos in pdb format in other backup folder. Looking
for
> >> a
> >> solution I opened the pdb photo and the foto in jpg format in a Hex
> >> editor
> >> and started compare... Then I found a way to convert them.
> >>
> >> Converting that PDB file to JPG:
> >>
> >> *If you use a hex editor you can see that the firsts bytes are the
> >> picture
> >> name in the photolib.
> >>
> >> From the start delete all bytes up to find the sequence:
> >>
> >> 0x44 0x42 0x4C 0x4B 0x00 0x00
> >>
> >> delete all these bytes and delete the two next bytes too.
> >>
> >> Now, all others bytes must be in the file, except some some sequences
> > you'll
> >> find in the
> >> middle..
> >>
> >> Find again other sequences (equal)
> >>
> >> 0x44 0x42 0x4C 0x4B 0x00 0x00
> >> and again delete the two next bytes.
> >>
> >> Save the edited file with .jpg and you can see the image!!
> >>
> >>
> >> Daniel
> >>
> >>
> >>
> >> --
> >> For information on using the PalmSource Developer Forums, or to
> > unsubscribe, please see http://www.palmos.com/dev/support/forums/
> >
> >
>
>
>
> --
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