Actually, Box Blurs are no more efficient than Gaussian on GPU hardware
due to the inability of shaders to perform "incremental" operations from
pixel to pixel. Both are implemented by convolution kernels and N
multiplies per pixel in the first horizontal pass and M multiplies per
pixel in the second vertical pass (where M and N vary by radius/size of
the blur and number of box passes)...
...jim
On 4/1/14 2:16 PM, John Smith wrote:
Sounds like your issue isn't in fact the blur, but, if it were, some things
suggestions are:
1. BoxBlurs are more efficient than GaussianBlurs:
http://en.wikipedia.org/wiki/Box_blur
2. Apply some of the suggestions from the openjfx Performance Tips and
Tricks page:
https://wiki.openjdk.java.net/display/OpenJFX/Performance+Tips+and+Tricks
Anecdotally, applying the Performance Tips and Tricks allowed smooth animations
on a 2012 MacBook Air with a full-screen blur.
-----Original Message-----
From: openjfx-dev [mailto:openjfx-dev-boun...@openjdk.java.net] On Behalf Of
Jeff Martin
Sent: Tuesday, April 01, 2014 11:17 AM
To: Mike Hearn
Cc: openjfx-dev@openjdk.java.net
Subject: Re: Expected frame rates for a full-screen blur
I assume retina optimization was added for JFX 8 (or is on the short list). I
think there is a Jira for it.
You can choose a non-retina resolution by going to display preferences and clicking the "Scaled"
radio button and selecting something to the right of "Best Resolution (Retina)". It used to be that
you could option-click the "Scaled" radio button to get a real list of choices, but now you can
only get that with a 3rd party resolution tool (I think).
jeff
On Apr 1, 2014, at 12:49 PM, Mike Hearn <m...@plan99.net> wrote:
How do I do that? And won't that make everything blurry? Retina support is one
reason why I chose JFX. Swing on Retina Macs is pretty much unusable, it's like
looking through thick plastic.
On Tue, Apr 1, 2014 at 7:26 PM, Jeff Martin <j...@reportmill.com> wrote:
If it's a MacBook Pro Retina, you might try it with and without retina level
resolution. I haven't tested JavaFX 8 with retina, but JFX 7 had serious
problems that would go away when I changed the display to non-retina.
jeff
On Apr 1, 2014, at 11:41 AM, Mike Hearn <m...@plan99.net> wrote:
Actually, playing some more, it seems like the poor frame rates I'm
seeing are not blur related, but rather affect any animation (i.e.
all rendering) when my main window is maximized. Shrinking the
window so it's smaller results in smooth animations of any kind.
This seems to be true no matter how I try and simplify my scene (e.g. turning
off a tiled background image).
I grabbed Ensemble and tried the circle blur demo. It actually made
my entire laptop unusable. The entire OS crawled to a halt and fps
was maybe
0.3 for everything, not just the Java app. Going back to the main
menu made things snappy again.
This is a bit disconcerting. Does anyone else see such appalling
performance impact from the blurred circles demo on their Mac? Is
this a driver issue, perhaps? Are there any platforms where this
demo hits a good fps?
On Tue, Apr 1, 2014 at 6:10 PM, Mike Hearn <m...@plan99.net> wrote:
Hi there,
On a MacBook Pro with OS X 10.9.2, does anyone have any estimates
for anticipated frame rates of a full-screen animated blur? I
noticed that when my window is not maximized, the blur is smooth
and high frame-rate. When maximized the blur is somewhat choppy.
Unfortunately I have no clue how much work is really involved in
GPU blurring and whether I'm being unreasonable to expect that many
pixels to be blurred per second (this is on a retina display).
Can anyone let me know if it's worth me trying to optimise this or
whether hardware limitations will mean that realistically I am expecting too
much.
thanks!
