Java-Gaming.org    
Featured games (79)
games approved by the League of Dukes
Games in Showcase (477)
Games in Android Showcase (109)
games submitted by our members
Games in WIP (536)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  Image flipping  (Read 1305 times)
0 Members and 1 Guest are viewing this topic.
Offline javacoder

Junior Newbie




Java games rock!


« Posted 2002-12-15 14:58:35 »

Hi

I'm trying to flip 2D images in java using this code:

1  
2  
3  
4  
g.drawImage (img,
             0, img.getHeight(this), 0,im.getWidth(this),
             0, 0, im.getWidth(this), im.getHeight(this),
             this);


This works but it seems not accelerated! Shocked

If I don't flip the image i get 110fps, when I flip it
I get 90fps.

There's another way to do image flipping in the
hardware accelerated way???

Many thanks.
Offline trembovetski

Senior Member




If only I knew what I'm talking about!


« Reply #1 - Posted 2002-12-18 05:14:53 »

Unfortunately, currently we do not accelerate such operations.

You can try to cache your flipped image to somewhat improve the speed (so you won't need to flip it on each frame), if that's possible.
Offline javacoder

Junior Newbie




Java games rock!


« Reply #2 - Posted 2002-12-21 06:42:26 »

Yes...

But the problem is with the flipped image...
I really don't know how to mantain the transparence
of the source image.  :-/

Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline trembovetski

Senior Member




If only I knew what I'm talking about!


« Reply #3 - Posted 2002-12-28 05:28:41 »

I'm sorry, I don't seem to follow your problem. Could you please elaborate a bit more on what you're trying to achieve and what's not working?
Offline Abuse

JGO Coder


Medals: 11


falling into the abyss of reality


« Reply #4 - Posted 2002-12-30 01:21:50 »

I think this is what your looking for javacoder,

To maintain the alpha channel of the source image when drawing an image,
simply set the composite of the destination Graphics context like this :-

1  
2  
3  
4  
5  
6  
7  
8  
9  
10  
11  
12  
13  
void flipImage(Image src, Image dst)
{
   Graphics2D g2 = (Graphics2D)dst.getGraphics();

   g2.setComposite(AlphaComposite.Src);

   g2.drawImage(src,
   0, src.getHeight(this), 0,src.getWidth(this),
   0, 0, src.getWidth(this), src.getHeight(this),
   this);

   g2.dispose();
}

Make Elite IV:Dangerous happen! Pledge your backing at KICKSTARTER here! https://dl.dropbox.com/u/54785909/EliteIVsmaller.png
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

CogWheelz (18 views)
2014-07-30 21:08:39

Riven (27 views)
2014-07-29 18:09:19

Riven (16 views)
2014-07-29 18:08:52

Dwinin (14 views)
2014-07-29 10:59:34

E.R. Fleming (35 views)
2014-07-29 03:07:13

E.R. Fleming (13 views)
2014-07-29 03:06:25

pw (44 views)
2014-07-24 01:59:36

Riven (46 views)
2014-07-23 21:16:32

Riven (30 views)
2014-07-23 21:07:15

Riven (32 views)
2014-07-23 20:56:16
Resources for WIP games
by CogWheelz
2014-08-01 18:20:17

Resources for WIP games
by CogWheelz
2014-08-01 18:19:50

List of Learning Resources
by SilverTiger
2014-07-31 18:29:50

List of Learning Resources
by SilverTiger
2014-07-31 18:26:06

List of Learning Resources
by SilverTiger
2014-07-31 13:54:12

HotSpot Options
by dleskov
2014-07-08 03:59:08

Java and Game Development Tutorials
by SwordsMiner
2014-06-14 00:58:24

Java and Game Development Tutorials
by SwordsMiner
2014-06-14 00:47:22
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!