Java-Gaming.org    
Featured games (91)
games approved by the League of Dukes
Games in Showcase (577)
games submitted by our members
Games in WIP (498)
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  
  Transform Color Transparent!  (Read 961 times)
0 Members and 1 Guest are viewing this topic.
Offline alvosul

Junior Newbie




Java games rock!


« Posted 2003-01-28 17:20:33 »

How do I set a transparent color in a picture?  Grin
Offline cogumbreiro

Junior Newbie




Java games rock!


« Reply #1 - Posted 2003-01-29 02:29:15 »

Here you go, have fun Wink :
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  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
      /**
       * Gets the image pixels in a one dimension array
       * @param img the original image
       * @return int[] the image's pixels
       */

      public static final int[] getPixels(Image img) {
            final int[] pix = new int[img.getWidth(null) * img.getHeight(null)];
            final PixelGrabber pg =
                  new PixelGrabber(
                        img,
                        0,
                        0,
                        img.getWidth(null),
                        img.getHeight(null),
                        pix,
                        0,
                        img.getWidth(null));
            try {
                  pg.grabPixels();
            } catch (InterruptedException e) {
            }
            return pix;
      }
      /**
       * Converts a unidimensional array of pixels into an image
       * @param pixels the image's pixels
       * @param w the image width
       * @param h the image height
       * @return Image the resulting image
       */

      public static final Image getImage(int[] pixels, int w, int h) {
            return Toolkit.getDefaultToolkit().createImage(
                  new MemoryImageSource(w, h, pixels, 0, w));
      }

      /**
       * This applies an alpha mask, removing all images coicident to argument's
       * Color. This doesn't alter the original image.
       * @param img the image you want to transform
       * @param keyColor the color you want to become invisible
       * @return Image the resulting image
       */

      public static final Image applyKeyColorMask(Image img, Color keyColor) {
            final int w = img.getWidth(null);
            final int h = img.getHeight(null);
            final int[] pxls = getPixels(img);
            final int blank = new Color(255, 0, 0, 0).getRGB();
            for (int i = 0; i < pxls.length; i++) {
                  if (pxls[i] == keyColor.getRGB()) {
                        pxls[i] = blank;
                  }
            }
            return getImage(pxls, w, h);
      }
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.

xsi3rr4x (23 views)
2014-04-15 18:08:23

BurntPizza (18 views)
2014-04-15 03:46:01

UprightPath (32 views)
2014-04-14 17:39:50

UprightPath (16 views)
2014-04-14 17:35:47

Porlus (32 views)
2014-04-14 15:48:38

tom_mai78101 (58 views)
2014-04-10 04:04:31

BurntPizza (116 views)
2014-04-08 23:06:04

tom_mai78101 (216 views)
2014-04-05 13:34:39

trollwarrior1 (183 views)
2014-04-04 12:06:45

CJLetsGame (190 views)
2014-04-01 02:16:10
List of Learning Resources
by Longarmx
2014-04-08 03:14:44

Good Examples
by matheus23
2014-04-05 13:51:37

Good Examples
by Grunnt
2014-04-03 15:48:46

Good Examples
by Grunnt
2014-04-03 15:48:37

Good Examples
by matheus23
2014-04-01 18:40:51

Good Examples
by matheus23
2014-04-01 18:40:34

Anonymous/Local/Inner class gotchas
by Roquen
2014-03-11 15:22:30

Anonymous/Local/Inner class gotchas
by Roquen
2014-03-11 15:05:20
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!