Re: [JAVA2D] AttributedString and Outline (the return of the glyph invaders!)
First, its not a bug in TextLayout drawString behaves identically.
You can prove this as follows, instead of your AttributedString use
Font fo = new Font("Serif", Font.PLAIN, 12);
fo = fo.deriveFont(AffineTransform.getScaleInstance(2 +
scale, 3));
g.setColor(Color.white);
g.setFont(fo);
g2d.drawString(text, x, y);
Second, text does not scale linearly because of the same hinting
and gridfitting effects I described earlier, and the glyphs are
fitted to the pixel grid and you are specifying fractional point sizes.
FRACTIONAL_METRICS is being specified but that affects only the
accumulation of the advance. It doesn't change the images.
You'd probably see a similar effect with the outline if you
disabled FRACTIONAL_METRICS.
-phil.
Michele Puccini wrote:
Thanks Phil,
I did a little mistake: is not a problem of the outline, which is indeed
correct.
Well, a piece of code is worth a thousand words.
The attached sample shows the "animated" difference between
TextLayout.draw() and g2d.draw(TextLayout.getOutline). Please give it a
try and see what happens. Is is quite funny to see the glyphs in the
first line jumping one pixel to the other just like the space invaders
in that old arcade game ;)
As you will see from the animation, the glyphs rendered with
TextLayout.draw() jump from one pixel to the other (at int coords ?),
while the glyph outlines are rendered with the expected quality.
Funny enough, the red cursor on the "C" letter is rendered "at float
coords".
So, in my opinion, TextLayout.draw() does not give the expected quality
resuls and this is a pity as it really is very useful.
Cheers,
Mik
ClassX Development Italy Via Francesca, 368/I I-56030 S.M. a Monte
(PI) <
Tel.(+39)-0587-705153 Fax.(+39)-0587-705153 WEB:
http://www.classx.it <
- Original Message - From: "Phil Race" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, November 16, 2006 1:08 AM
Subject: Re: [JAVA2D] AttributedString and Outline
The bitmap glyph images are hinted and gridfitted.
This is not done for the returned outline as it
doesn't make sense to do that for a pure shape.
For most of what you are doing you need outlines
anyway as the rasteriser can only return glyph
images.
-phil.
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Re: [JAVA2D] AttributedString and Outline (the return of the glyph invaders!)
Thanks Jan, the trick is what I call "old school". It takes me back to the good old Amiga days.. Of course it is only applicable to a very limited number of cases. An outline of 9 pixels will request much more than five times.. What I want to focus here is that maybe we're facing a bug in the TextLayout implementation. Give a try to my src code and get a picture of what I mean. Cheers, Mik ClassX Development Italy Via Francesca, 368/I I-56030 S.M. a Monte (PI) < Tel.(+39)-0587-705153 Fax.(+39)-0587-705153 WEB: http://www.classx.it < - Original Message - From: ""Jan Bösenberg (INCORS GmbH)"" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, November 16, 2006 10:53 AM Subject: Re: [JAVA2D] AttributedString and Outline (the return of the glyph invaders!) Michele, I have not tested your showcase but I think I know what you mean. Probably the only way to achieve what you want is to implement your own outline rendering by draw the string five times. Four times using the foreground color with x, y offsets (1, -1), (1, 1), (-1, 1), (-1, -1), and finally once without offset using the background color (or white if there is no background color). This will not look perfect and the glyphs will not really be hollow as you would expect from and outlined glyph, but maybe while TextLayout has no support for an Outline attribute this will do the job. Cheers Jan Michele Puccini schrieb: Thanks Phil, I did a little mistake: is not a problem of the outline, which is indeed correct. Well, a piece of code is worth a thousand words. The attached sample shows the "animated" difference between TextLayout.draw() and g2d.draw(TextLayout.getOutline). Please give it a try and see what happens. Is is quite funny to see the glyphs in the first line jumping one pixel to the other just like the space invaders in that old arcade game ;) As you will see from the animation, the glyphs rendered with TextLayout.draw() jump from one pixel to the other (at int coords ?), while the glyph outlines are rendered with the expected quality. Funny enough, the red cursor on the "C" letter is rendered "at float coords". So, in my opinion, TextLayout.draw() does not give the expected quality resuls and this is a pity as it really is very useful. Cheers, Mik ClassX Development Italy Via Francesca, 368/I I-56030 S.M. a Monte (PI) < Tel.(+39)-0587-705153 Fax.(+39)-0587-705153 WEB: http://www.classx.it < - Original Message - From: "Phil Race" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, November 16, 2006 1:08 AM Subject: Re: [JAVA2D] AttributedString and Outline The bitmap glyph images are hinted and gridfitted. This is not done for the returned outline as it doesn't make sense to do that for a pure shape. For most of what you are doing you need outlines anyway as the rasteriser can only return glyph images. -phil. === To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA2D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help". === To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA2D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help". === To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA2D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
Re: [JAVA2D] AttributedString and Outline (the return of the glyph invaders!)
Michele, I have not tested your showcase but I think I know what you mean. Probably the only way to achieve what you want is to implement your own outline rendering by draw the string five times. Four times using the foreground color with x, y offsets (1, -1), (1, 1), (-1, 1), (-1, -1), and finally once without offset using the background color (or white if there is no background color). This will not look perfect and the glyphs will not really be hollow as you would expect from and outlined glyph, but maybe while TextLayout has no support for an Outline attribute this will do the job. Cheers Jan Michele Puccini schrieb: Thanks Phil, I did a little mistake: is not a problem of the outline, which is indeed correct. Well, a piece of code is worth a thousand words. The attached sample shows the "animated" difference between TextLayout.draw() and g2d.draw(TextLayout.getOutline). Please give it a try and see what happens. Is is quite funny to see the glyphs in the first line jumping one pixel to the other just like the space invaders in that old arcade game ;) As you will see from the animation, the glyphs rendered with TextLayout.draw() jump from one pixel to the other (at int coords ?), while the glyph outlines are rendered with the expected quality. Funny enough, the red cursor on the "C" letter is rendered "at float coords". So, in my opinion, TextLayout.draw() does not give the expected quality resuls and this is a pity as it really is very useful. Cheers, Mik ClassX Development Italy Via Francesca, 368/I I-56030 S.M. a Monte (PI) < Tel.(+39)-0587-705153 Fax.(+39)-0587-705153 WEB: http://www.classx.it < - Original Message - From: "Phil Race" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, November 16, 2006 1:08 AM Subject: Re: [JAVA2D] AttributedString and Outline The bitmap glyph images are hinted and gridfitted. This is not done for the returned outline as it doesn't make sense to do that for a pure shape. For most of what you are doing you need outlines anyway as the rasteriser can only return glyph images. -phil. === To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA2D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help". === To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA2D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
Re: [JAVA2D] AttributedString and Outline (the return of the glyph invaders!)
Thanks Phil, I did a little mistake: is not a problem of the outline, which is indeed correct. Well, a piece of code is worth a thousand words. The attached sample shows the "animated" difference between TextLayout.draw() and g2d.draw(TextLayout.getOutline). Please give it a try and see what happens. Is is quite funny to see the glyphs in the first line jumping one pixel to the other just like the space invaders in that old arcade game ;) As you will see from the animation, the glyphs rendered with TextLayout.draw() jump from one pixel to the other (at int coords ?), while the glyph outlines are rendered with the expected quality. Funny enough, the red cursor on the "C" letter is rendered "at float coords". So, in my opinion, TextLayout.draw() does not give the expected quality resuls and this is a pity as it really is very useful. Cheers, Mik ClassX Development Italy Via Francesca, 368/I I-56030 S.M. a Monte (PI) < Tel.(+39)-0587-705153 Fax.(+39)-0587-705153 WEB: http://www.classx.it < - Original Message - From: "Phil Race" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, November 16, 2006 1:08 AM Subject: Re: [JAVA2D] AttributedString and Outline The bitmap glyph images are hinted and gridfitted. This is not done for the returned outline as it doesn't make sense to do that for a pure shape. For most of what you are doing you need outlines anyway as the rasteriser can only return glyph images. -phil. === To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA2D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help". AttributedStringTest.java Description: Binary data
