1. QBASIC BLoad
Hello all,
Jeff Zeitlin wrote :-
> Also, is anyone familiar with the GWBASIC/QBASIC BSAVE format?
> Support for that picture format would be a nice thing to have.
I did a lot of work with this format some time ago, the first 7 bytes are=
the header :-
Offset Task Normal value to/from screen memory
0 ? FD
1 ~ 2 Segment A000 =3D Screen segment
3 ~ 4 Offset 0000 =3D Start of screen
5 ~ 6 Length FA00 =3D 64,000
After that comes the image data which is structured depending on the scre=
en
mode :-
QB Screen (VGA) Euphoria Structure
13 19 64000 bytes @ 320 X 200 , 1 pixel per byt=
e
12 18 38400 bytes x 4 planes @ 640 x 480 , 8
pixels per byte
11 17 38400 bytes @ 640 x 480 , 8 pixels per by=
te
To load a SCREEN 13 or 11 BLOADed image all you have to do is skip past
the header, read the image data into a buffer and copy it onto the screen=
=2E
To load a SCREEN 12 image is tricky, I posted details in one of my earlie=
r
messages.
I hope this helps - Peter
