Java-Gaming.org
Play Revenge of the Titans! The situation is critical. We need fancy commanders to defend Earth, the moon, Mars!
Featured games (78)
games approved by the League of Dukes 		Games in Showcase (408)
games submitted by our members 		Games in WIP (293)
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  
  fastest image writing  (Read 2334 times)
0 Members and 1 Guest are viewing this topic.
Offline counterp

Senior Member


Medals: 11
« Posted 2011-08-11 23:28:17 »
ImageIO.write is dangerously slow and I guess that's because it's compressing the image to another format.

So how do I go about doing this, when size isn't a factor?

The fastest method of writing an image. Do I grab all pixels and write them?
Offline Riven
« League of Dukes »

JGO Overlord


Medals: 439
Projects: 4


Hand over your head.
« Reply #1 - Posted 2011-08-11 23:56:27 »
TGA

it's basically a header + dump of the pixels
Hi, appreciate more people! Σ ♥ = ¾
Learn how to award medals... and work your way up the social rankings
Projects: Revenge of the Titans, Titan Attacks, Droid Assault, and Ultratron
Offline counterp

Senior Member


Medals: 11
« Reply #2 - Posted 2011-08-12 00:04:49 »
Is there a faster way of getting all the pixels or do I just have to use

1  
2  
3  
BufferedImage img = region.images[i];
int[] ARGB = new int[w * h];
img.getRGB(0, 0, w, h, ARGB, 0, w);


is there a way to avoid the integer array all together and write info directly to a byte array?
Games published by our own members! Check 'em out!
Play the free demo of Revenge of the Titans!
Offline Riven
« League of Dukes »

JGO Overlord


Medals: 439
Projects: 4


Hand over your head.
« Reply #3 - Posted 2011-08-12 00:07:01 »
about a zillion times faster:
1  
2  
3  
4  
5  
6  
7  
8  
9  
   public static int[] accessRasterIntArray(BufferedImage src)
   {
      return ((DataBufferInt) src.getRaster().getDataBuffer()).getData();
   }

   public static byte[] accessRasterByteArray(BufferedImage src)
   {
      return ((DataBufferByte) src.getRaster().getDataBuffer()).getData();
   }
Hi, appreciate more people! Σ ♥ = ¾
Learn how to award medals... and work your way up the social rankings
Projects: Revenge of the Titans, Titan Attacks, Droid Assault, and Ultratron
Offline counterp

Senior Member


Medals: 11
« Reply #4 - Posted 2011-08-12 00:08:11 »
1  
2  
3  
4  
public static byte[] accessRasterByteArray(BufferedImage src)
{
   return ((DataBufferByte) src.getRaster().getDataBuffer()).getData();
}


I think that was exactly what I was looking for Wink

thanks
Offline Riven
« League of Dukes »

JGO Overlord


Medals: 439
Projects: 4


Hand over your head.
« Reply #5 - Posted 2011-08-12 00:09:50 »
btw: you can use BufferedImage().getType() to pick the correct backing DataBuffer
Hi, appreciate more people! Σ ♥ = ¾
Learn how to award medals... and work your way up the social rankings
Projects: Revenge of the Titans, Titan Attacks, Droid Assault, and Ultratron
Offline counterp

Senior Member


Medals: 11
« Reply #6 - Posted 2011-08-12 00:29:30 »
EDIT: Alright everything's working
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

  Check out our latest community projects!
Play Revenge of the Titans! The situation is critical. We need fancy commanders to defend Earth, the moon, Mars!
 
Featured Project
Browse for soundtracks for your game!
Picture of the Day
Latest Featured
Add your game!

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

The first screenshot will be displayed as a thumbnail.
Shameless Plug!
The invasion has landed! On Mars! And you're there to beat 'em!
Latest pastebins
cubemaster21 (142 views)
2013-05-17 21:29:12
alaslipknot (150 views)
2013-05-16 21:24:48
gouessej (181 views)
2013-05-16 00:53:38
gouessej (174 views)
2013-05-16 00:17:58
theagentd (184 views)
2013-05-15 15:01:13
theagentd (169 views)
2013-05-15 15:00:54
StreetDoggy (213 views)
2013-05-14 15:56:26
kutucuk (237 views)
2013-05-12 17:10:36
kutucuk (236 views)
2013-05-12 15:36:09
UnluckyDevil (241 views)
2013-05-12 05:09:57
Medals in last month
Riven16x
HeroesGraveDev15x
davedes10x
Jimmt7x
matheus237x
theagentd6x
Vermeer6x
princec6x
ctomni2316x
sproingie5x
Oskuro5x
Nate4x
Roquen4x
alaslipknot4x
gouessej4x
Cero3x
Latest wiki revisions
Complex number cookbook
by Roquen
2013-04-24 12:47:31
2D Dynamic Lighting
by Oskuro
2013-04-17 16:46:12
2D Dynamic Lighting
by Oskuro
2013-04-17 16:45:57
2D Dynamic Lighting
by Oskuro
2013-04-17 16:23:20
Noise (bandpassed white)
by Roquen
2013-04-05 17:36:01
Noise (bandpassed white)
by Roquen
2013-04-03 16:17:38
Java Data structures
by Roquen
2013-03-29 13:21:12
Topic Request
by kutucuk
2013-03-22 21:42:01
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!
Page created in 0.094 seconds with 21 queries.