🚀 go-pugleaf

In <8698@laas.laas.fr>, Jean-Etienne Doucet writes:
> Quite a long time ago, I've asked -- on the net -- if there were
> some ways to simulate the GET/PUT GFA Basic instructions in C ?
> (Preferably HSC)

Nobody answered?!?  Sheesh!  We all must've been in a flame war or
something...  ;-)

> So what ? I stick to GFA Basic for writing games and only use
> C for writing programs with no (or little) graphics

IMHO, GFA BASIC is nasty and hellishly incompatible...  Hopefully I
won't start another flame war by saying that.

> For people who don't know what GET and PUT are:
> GET x1,y1,x2,y2,CH$
> 	copy the screen portion given by x1,x2,y1,y2 into the string CH$
> PUT x,y,CH$
> 	copy back the screen portion in CH$ as a rectangle with x,y being
> 	the upper left point coordinates.

Have you done any VDI programming?  It needs a little bit of setting up,
but not too much.  And it'll generally work in any resolution...

vro_cpyfm() is the function you're after:

Copy Raster, Opaque

int vid_handle, mode, points[8];
struct fdbstr
{
    int *fd_addr;       /* ptr to image data area [just a buffer] */
    int fd_w;           /* width in pixels */
    int fd_h;           /* height in pixels */
	int fd_wdwidth;		/* image width in words (ie, 16-bits) */
	int fd_stand;		/* standard format or ST format flag */
	int fd_nplanes;		/* number of colour bit planes */
	int fd_r1, fd_r2,	/* reserved for future use */
        fd_r3;
} src, dst;

vro_cpyfm( vdi_handle, mode, points, &src, &dst );

For more info, grab a VDI book, or beg someone for sample code...  ;-) 
I'd type the rest of the manual page, but it's quite long.  Useful mode
values are 3 (replace dst with src), 6 (XOR dst with src).
-- 
-------------------========================================-------------------
Chris Herborth
cherborth@semprini.tdkcs.waterloo.on.ca