In comp.windows.x, Eigenvector

wrote
on Mon, 11 Sep 2006 17:20:30 -0700
:
> I haven't seen the evidence conclusively but is it true that XDraw(mumble)
> accepts only integer values for its inputs? I seem to remember being able
> to use floating and double operations directly as inputs to those particular
> functions in HPUX but yet on the AIX platform it doesn't seem to accept them
> as valid.
>
> I've been limping along by using typecasts in my code, but I wanted to
> confirm that it/they will only accept integer values.
>
>

These are typical:

int XDrawString(Display *display, Drawable d, GC gc,
int x, int y, char *string, int length);

int XDrawString16(Display *display, Drawable d, GC gc,
int x, int y, XChar2b *string, int length);

int XDrawLine(Display *display, Drawable d, GC gc,
int x1, int y1, int x2, int y2);

int XDrawLines(Display *display, Drawable d, GC gc,
XPoint *points, int npoints, int mode);

int XDrawSegments(Display *display, Drawable d, GC gc,
XSegment *segments, int nsegments);

It's worth noting that:

typedef struct {
short x1, y1, x2, y2;
} XSegment;

typedef struct {
short x, y;
} XPoint;

have some nasty ramifications if one want to properly implement
large (> 32767) scrollable regions. Also, the ints in the
above call are probably really shorts, when they're thrown
out on the network (see /usr/[X11R6/]include/X11/Xproto.h
for some of the packet; the rest is probably described in
Volume 0 of O'Reilly).

There might be an extension now, of course, that allows long ints.
I for one don't know.

--
#191, ewill3@earthlink.net
Windows Vista. Because it's time to refresh your hardware. Trust us.