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From "Richard Liang" <richard.lian...@gmail.com>
Subject Re: [classlib][awt] Fonts with negative size.
Date Sat, 23 Sep 2006 12:46:14 GMT
On 9/23/06, Alexey Varlamov <alexey.v.varlamov@gmail.com> wrote:
> Google said this is the bug of RI in progress [1]. However there is no
> distinct resolution yet...
>

It's reported again Java 1.1.8 more than 3 years agao. I don't think
RI will fix this bug.

Richard.

> [1] http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4803825
>
>
> 2006/9/23, Richard Liang <richard.liangyx@gmail.com>:
> > On 9/22/06, Ilya Okomin <ilya.okomin@gmail.com> wrote:
> > > Hi, all!
> > >
> > > I was playing with fonts and found that Font with negative size can be
> > > created on RI.
> > >  Unfortunately spec keep silence about fonts with negative sizes.
> > > On Harmony if font size is negative then it is set to zero.
> > >
> > > ------------test.java---------------
> > > import java.awt.*;
> > > import java.awt.font.FontRenderContext;
> > >
> > > public class NegativeFontTest {
> > >
> > >     public static void main(String[] args) {
> > >         int fontsize=-5;
> > >         Font localFont = new Font("Arial", 2, fontsize);
> > >         System.out.println("Size = " + localFont.getSize2D());
> > >
> > >         System.out.println("Height = " + localFont.getLineMetrics("", new
> > > FontRenderContext(null, false, false)).getHeight());
> > >         System.out.println("MaxCharBounds = " + localFont.getMaxCharBounds(new
> > > FontRenderContext(null, false, false)));
> > >     }
> > >
> > > }
> > > ----------------------------------------
> > > If you run this test case on RI you can see that output looks quite strange:
> > >
> > > Size = -5.0
> > > Height = -5.7495117
> > > MaxCharBounds = java.awt.geom.Rectangle2D$Float[x=0.0,y=4.6081543,w=-5.46875
> > > ,h=-5.7495117]
> > >
> > >
> > > Actually, I dont see any sence in negative height and width metrics and
> > > I think it is an RI bug.
> > > If you try to draw text with such font on RI - nothing is happen, you can't
> > > see any text on the component.
> > > I've ran 'xfontsel' tool on Linux and there was suggested to choose only
> > > positive sized fonts. Also I've looked on the GDI LOGFONT structure
> > > description in MSDN and I've seen there again that we deal with absolute
> > > height values.
> > >
> > > Any thoughts on this issue, is it RI bug or not?
> >
> > We cannot say it's a bug of RI, because the spec does not explicitly
> > describe the requirement of font size.
> >
> > I suggest we follow RI.
> >
> > Best regards,
> > Richard
> >
> > >
> > > Thanks,
> > > Ilya.
> > >
> > > --
> > > --
> > > Ilya Okomin
> > > Intel Middleware Products Division
> > >
> > >
> >
> >
> > --
> > Richard Liang
> > China Development Lab, IBM
> >
> > ---------------------------------------------------------------------
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> >
> >
>
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>


-- 
Richard Liang
China Development Lab, IBM

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