On 20.08.2011, at 22:55, Richard Sanders wrote:
> There seems to be an out by one error in drawing coordinate between
> win32 and X11/
>
> Here is an example
>
> static void DrawRod(int x, int y, int d)
> {
> int r = d >> 1;
> fl_color(FL_RED);
> #ifdef WIN32
> fl_pie(x, y, d, d, 0, 360);
> #else
> fl_pie(x, y, d + 1, d + 1, 0, 360);
> #endif
> fl_color(FL_BLACK);
> fl_circle(x + r, y + r, r);
> }
The WIN32 API uses different coordinates than the OS X and X11 API. Especially
with round drawings that should use floating point coordinates, the those
errors become visible. FLTK tries its best to make fl_... graphics calls look
the same on all platforms, but that is not always possible.
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