Hi Felipe,

thanks for the detailed reply, that Firefox blog post is interesting.

I guess sub-pixel positioning is the crucial point here. If a black, 1-pixel 
wide vertical stroke is positioned between two pixels, you'll get a dimmer, 
2-pixel wide stroke instead. 

Suppose I want to see what GDI, SWT-like text looks like in JavaFX. I should 
set -Djavafx.text=t2k. But looking at the picture 
(http://i.imgur.com/CGyckge.png) it still seems there is some additional 
blurring in JavaFX. Some additional sub-pixel positioning logic, perhaps?

But I concede that there has to be a compromise between positioning and 
'vibrancy' for small text.


-----Ursprüngliche Nachricht-----
Von: openjfx-dev [mailto:openjfx-dev-boun...@openjdk.java.net] Im Auftrag von 
Felipe Heidrich
Gesendet: Montag, 10. März 2014 18:46
An: OpenJFX Mailing List
Betreff: Re: Poor font rendering..

Thank you Rob,

DirectWrite is the engine JavaFX uses to produces glyph masks (white on black), 
therefore JavaFX text should resemble that of DirectWrite (it is not exactly 
the same, as JavaFX does its own color blending and gamma correction).

We decided to use DirectWrite for JavaFX because it is the most modern native 
technology on Windows that we can use.
In particular, we were interested on sub pixel positioned text. GDI, for 
example, all glyph positioning are expressed as integer, and glyphs are 
(usually) aggressively hinted.

Interesting FIreFox had all the same trouble when they switched from GDI to 
Please read 
JavaFX always uses DirectWrite natural mode rendering. We too can provided 
switches for GDI Classic rendering mode, cleartype level, enhanced contrast, 
gamma, etc.
It is all defined here

Maybe that would help ?

SWT uses GDI to render text (I know, I implemented it). 
JavaFX with -Djavafx.text=t2k uses GDI to render LCD text, SWT and JavaFX with 
-Djavafx.text=t2k are not same, but similar, likely again because JavaFX does 
its own color blending and gamma correction.


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