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  Java2D and Image-drawing speed  (Read 1911 times)
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Offline NexusOne

Junior Member




Java games rock!


« Posted 2003-07-19 05:15:16 »

In a single-player java2d game i'm making (first time) im getting disgusting rates of 5 frames per second when the current view is graphics-intensive, which slows the character to a crawl... I thought that the Images I had were ManagedImages since they were created through Component's createImage() but apparently these aren't fast enough. How can I *squeeze better performance* out of my java2d-based engine?
Offline kevglass

JGO Kernel


Medals: 85
Projects: 22


Coder, Trainee Pixel Artist, Game Reviewer


« Reply #1 - Posted 2003-07-19 07:28:09 »

Arn't you meant to use createCompatibleImage() to get managed images?

Kev

Offline trembovetski

Senior Member




If only I knew what I'm talking about!


« Reply #2 - Posted 2003-07-26 07:19:42 »

You may be using some operation which is not accelerated, like translucency, compositing, antialiasing. Do a search on Java2D forum, there's plenty of threads covering this topic.
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Offline Mark Thornton

Senior Member





« Reply #3 - Posted 2003-07-26 08:58:16 »

Quote
You may be using some operation which is not accelerated, like translucency, compositing, antialiasing. Do a search on Java2D forum, there's plenty of threads covering this topic.


Finding out what is or isn't accelerated (or in the case of printing what causes the system to revert to using a big bitmap for the whole page) is something like playing a MUD. At least we get to cooperate, but it is way too hard to track down the details.
Offline DrBizzar0

Junior Member




Raj raj!


« Reply #4 - Posted 2003-07-26 09:04:43 »

Maybe should create a wiki for detailing that?
Offline AndersDahlberg

Junior Member





« Reply #5 - Posted 2003-07-26 19:38:53 »

Please fill out the information (provided by Abuse) that I started adding at "java2d" wiki page - someone good at wiki's should probably categorise it a bit better than I did too Grin
Offline NexusOne

Junior Member




Java games rock!


« Reply #6 - Posted 2003-07-28 06:07:23 »

i AM using translucency.... isn't there any accelerated translucency i can switch to?
Offline AndersDahlberg

Junior Member





« Reply #7 - Posted 2003-07-28 18:46:34 »

from http://wiki.java.net/bin/view/Games/Java2D

Quote

Currently accelerated Transparency is only possible using ManagedImages. (not with VolatileImages)

Also, currently only bitmask transparency is by default accelerated. However, there are flags to enabled hardware acceleration for images with a full alpha channel (Translucent). These flags also make AlphaComposite operations hardware accelerated.

The code to set the flags is :-

Code:

System.setProperty("sun.java2d.translaccel", "true");
System.setProperty("sun.java2d.ddforcevram", "true");

This Thread covers the flags in more detail http://www.java-gaming.org/cgi-bin/JGNetForums/YaBB.cgi?board=2D;action=display;num=1048663269;start=0#0
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