Java-Gaming.org    
Featured games (81)
games approved by the League of Dukes
Games in Showcase (492)
Games in Android Showcase (112)
games submitted by our members
Games in WIP (556)
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  
  Crop transparent image  (Read 797 times)
0 Members and 1 Guest are viewing this topic.
Offline luisoft

JGO Coder


Projects: 6


Java games rock!


« Posted 2013-02-23 15:51:25 »

Hello,

I have a method for cropping images. But it only works for non-transparent. If I submit a transparent image using my method, the returned images does not preserve the transparent color.

How can I preserve transparency automatically? Or should I manually set transparency for subimages? How can I do that?

1  
2  
3  
4  
5  
6  
7  
8  
9  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
   private static Image[] cropImage(Image pImage, int pCropWidth,
         int pCropHeight) {
      int i = 0;
      int j = 0;
      Vector<Image> imgs = new Vector<Image>();
      boolean finished = false;

      while (!finished) {
         if ((i + pCropWidth) > pImage.getWidth(null)) {
            i = 0;
            j += pCropHeight;
         }

         if ((j + pCropHeight) <= pImage.getHeight(null)) {
            Image image1;
            CropImageFilter cropimagefilter = new CropImageFilter(i, j,
                  pCropWidth, pCropHeight);
            FilteredImageSource filteredimagesource = new FilteredImageSource(
                  pImage.getSource(), cropimagefilter);
            image1 = Toolkit.getDefaultToolkit().createImage(
                  filteredimagesource);
            imgs.add(image1);
            i += pCropWidth;
         } else {
            pImage.flush();
            finished = true;
         }
      }

      Image[] tmp = new Image[imgs.size()];

      for (int e = 0; e < tmp.length; e++) {
         tmp[e] = imgs.get(e);
      }

      return tmp;
   }
Offline davedes
« Reply #1 - Posted 2013-02-23 16:37:21 »

Assuming you are using BufferedImages... Why don't you use getSubImage? It would be easier, take advantage of potential hardware acceleration, and also work with transparency.

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.

Nickropheliac (16 views)
2014-08-31 22:59:12

TehJavaDev (23 views)
2014-08-28 18:26:30

CopyableCougar4 (33 views)
2014-08-22 19:31:30

atombrot (42 views)
2014-08-19 09:29:53

Tekkerue (41 views)
2014-08-16 06:45:27

Tekkerue (35 views)
2014-08-16 06:22:17

Tekkerue (26 views)
2014-08-16 06:20:21

Tekkerue (37 views)
2014-08-16 06:12:11

Rayexar (73 views)
2014-08-11 02:49:23

BurntPizza (49 views)
2014-08-09 21:09:32
List of Learning Resources
by Longor1996
2014-08-16 10:40:00

List of Learning Resources
by SilverTiger
2014-08-05 19:33:27

Resources for WIP games
by CogWheelz
2014-08-01 16:20:17

Resources for WIP games
by CogWheelz
2014-08-01 16:19:50

List of Learning Resources
by SilverTiger
2014-07-31 16:29:50

List of Learning Resources
by SilverTiger
2014-07-31 16:26:06

List of Learning Resources
by SilverTiger
2014-07-31 11:54:12

HotSpot Options
by dleskov
2014-07-08 01:59:08
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!