Hi,
One last thing about Marlin renderer:
it is available since OpenJDK9 and you can tune its subpixels to let say
1x1 ie 1 pixel: -Dsun.java2d.renderer.subPixel_log2_X=0
-Dsun.java2d.renderer.subPixel_log2_Y=0
I ran again the 'slow' test on linux ~ 0.5s:
- 4x faster than Marlin AA defaults
- 6.5x faster than AWT C code (HiDPI)
- still 16x slower than accelerated pipeline (xrender)
OpenJDK Runtime Environment 18.9 (build 11+28)
JAVA_OPTS: -DuseAA=true -Dsun.java2d.uiScale=2.5
-Dsun.java2d.renderer.subPixel_log2_X=0
-Dsun.java2d.renderer.subPixel_log2_Y=0
Java: 11 11+28
oct. 11, 2018 2:36:12 PM polylinetest.Canvas paintComponent
INFO: Paint Time: 0,747s
oct. 11, 2018 2:36:12 PM polylinetest.Canvas paintComponent
INFO: Paint Time: 0,553s
oct. 11, 2018 2:36:13 PM polylinetest.Canvas paintComponent
INFO: Paint Time: 0,559s
oct. 11, 2018 2:36:13 PM polylinetest.Canvas paintComponent
INFO: Paint Time: 0,55s
Of course, you should enable antialiasing:
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D graphics = (Graphics2D) g;
+ if (USE_AA) {
+
graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
+ }
PS: In OpenJFX, noAA rendering is using a specific Marlin renderer instance
(1x1 sampling) so it could be applied to Java2D noAA too.
Cheers,
Laurent
Le jeu. 11 oct. 2018 à 13:27, Peter Hull <peterhul...@gmail.com> a écrit :
> Hi Laurent,
> Thanks for the detailed explanation. I quickly checked on the older
> Windows system and the Java 11 window was the same size as the Java 8
> one, implying no scaling was going on (I guess just because it has a
> lower resolution monitor) - so that confirms your hypothesis.
>
> If I use -Dsun.java2d.uiScale=1.0 that's OK for my laptop, it doesn't
> matter if the window is a bit small. However I believe some higher end
> systems have much higher scaling factors (2x, 3x?). Is there a general
> way to specify a 1px line regardless of scaling, because in my case I
> don't mind too much if it's a 'hair-line'?
>
> By the way, my actual application doesn't have 65000 lines but it
> draws 3 graphs with about 3000 points, which makes it noticeably slow
> when resizing the Window. I suppose I should look into cutting down
> the number of points somehow...
>
> Pete
>
--
--
Laurent Bourgès
