<AWT Dev> Instability of texts in Graphics2D imaging
philip.race at oracle.com
Wed Mar 14 17:46:25 PDT 2012
2d-dev at openjdk.java.net is the right place for 2D, not AWT.
However this list and that list is are for people working
together on the implementation. Its not a developer forum
for users of the APIs. So if you have a patch to fix this then
2d-dev is the place. If you want to report a bug (but get no
support), go to bugs.sun.com .. if you'd like some support
from fellow developers you want the forum at
If you'd like to pay, I'm sure Oracle has some options there too :-)
On 3/14/12 5:18 PM, Herve Girod wrote:
> I don't know if it's the right place to post this, but in one of our
> applications we have a strange problem with texts when drawing Java2D
> images. Basically it is an application which draws a Graphics2D image
> with a rotation, the rotation quickly changing with time.
> There is s strange effect with characters when they rotate: it appears
> as if each character "was rotated seperately", there is a small
> discrepancy between the various characters of each String (they appear
> to lose their alignment during the movement, then they seem to
> realign), as if their position were computed separately or at
> different times. However, each String is rendered using the standard
> drawString method of the Graphics2D class.
> First we thought it could have been because of of the rendering hints
> we used, but we already used some of them (including antialiasing),
> and this effect does not disappear even after setting various options
> (for example: VALUE_FRACTIONALMETRICS_ON, VALUE_RENDER_QUALITY,
> VALUE_STROKE_PURE, VALUE_TEXT_ANTIALIAS_ON).
> The particularity of our use case is that :
> - the graphics are updated very quickly,
> - we are on Java 6 on a Windows machine (I did not try on Java 7)
> - the drawings is in fact performed inside Swing components
> My main question is: do I need to check closely our app to hunt for a
> problem in our part, or is it possible that this behavior may be
> linked to how Java draws Strings?
> Herve Girod
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