Bitmap drawing and OS3.1 NEgative Coords Problem

[Wolfgang Bochar]

I am having a problem with a Bitmap drawing function. It works well on OS
3.3 and above but when I use it on 3.1, I get some unexpected results. The
function will draw the bitmap as long as its in a positive coordinate, the
moment I move to a negative coordinate the throws up and error saying
"scrDriverNew.c INVALID PARAMS". Here is my code, any helpful thoughts on
the subject would be appreciated. Is there a work around for this?


static void DrawBitmap(Coord x, Coord y, UInt16 id)
{
    MemHandle h;
    BitmapPtr p;

    h = DmGet1Resource('Tbmp', id);
    if (h != NULL)
         {
        p = (BitmapPtr) MemHandleLock(h);
        WinDrawBitmap(p, x, y);
        MemHandleUnlock(h);
        DmReleaseResource(h);
         p = NULL;
        }
}



Wolfgang Bochar


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