From: Martin Sevior (msevior@physics.unimelb.edu.au)
Date: Thu May 29 2003 - 18:38:59 EDT
On 30 May 2003, Marc Maurer wrote:
> Our Win32 drawLine function DOES draw 5 pixels in this case, and the
> GDK/X function only draws 4!
>
> Since I'm trying to pixel-perfect the rulers, I get the following
> differences:
>
> the (almost) pixel perfect GDK version:
> http://pino.frontisterion.nl/uwog/rulers_gdk.png
>
> and the win32 version:
> http://pino.frontisterion.nl/uwog/rulers_win32.png
>
> note that the ruler code is 100% XP, so this _is_ a bug, and all drawing
> functions should act the same.
>
> Which one should we adopt: the (IMO good working) win32 "routine", or
> the GDK one?
>
If we change the gdk routine, we should make VERY sure that setting the
clip regine and doing color fills still works down to the last pixel,
otherwise we'll have screen dirt.
Cheers
Martin
>
> Marc
>
>
> Op do 29-05-2003, om 12:32 schreef Marc Maurer:
> > Op do 29-05-2003, om 12:03 schreef Hubert Figuiere:
> > > On jeudi, mai 29, 2003, at 03:39 Europe/Paris, Marc Maurer wrote:
> > >
> > > > Just to be sure I'm not doing stange things here at 4 am: when I have
> > > > this line of code
> > > >
> > > > m_pG->drawLine(left,top,left+m_pG->tlu(4),top);
> > > >
> > > > I expect a line of _____5______ pixels to be drawn, right?
> > > >
> > > > If so, then GR_UnixGraphix->drawLine is fscked (and since it passes
> > > > direct to GDK, GDK is fscked), since it only draws 4. I don't believe
> > > > what I'm writing here, so I want to be sure I don't miss anything...
> > >
> > > + 4 is 4 pixels :-)
> > > It works the way it should :-)
> >
> > Why? When I draw a line from, say x coord 10 to 10+4=14, that's 5 pixels: 10, 11, 12, 13 and 14
> >
> > Marc
>
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