creating new BufferedImage copy

[Serethos]

i have a bufferedimage and use the getSubimage() method. but it is important for me to create a new instance of the image in the size of the choosed subimage (i want to avoid referencing the whole image).

because bufferedimage has nothing like a copy-constructor
i tried somthing like this:

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... {       BufferedImage frame = createBufferedImage(img.getSubimage(0, 0, 0, 0)); } public BufferedImage createBufferedImage(BufferedImage image)       {           ColorModel cm = image.getColorModel();           boolean premultiplied = cm.isAlphaPremultiplied();           WritableRaster raster = image.copyData(image.getRaster());           return new BufferedImage(cm, raster, premultiplied, null);       }

but i get the following exception:

java.awt.image.RasterFormatException: negative or zero width
       at java.awt.image.Raster.<init>(Raster.java:1094)
       at java.awt.image.WritableRaster.<init>(WritableRaster.java:114)
       at sun.awt.image.SunWritableRaster.<init>(SunWritableRaster.java:52)
       at sun.awt.image.ByteComponentRaster.<init>(ByteComponentRaster.java:140
)
       at sun.awt.image.ByteInterleavedRaster.<init>(ByteInterleavedRaster.java
:177)
       at sun.awt.image.ByteInterleavedRaster.createWritableChild(ByteInterleav

[oNyx]

Just use drawImage instead of getSubImage

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BufferedImage[] tiles = new BufferedImage[6]; for(int i=0;i<6;i++) {       tiles[i] = gc.createCompatibleImage(32,32,Transparency.BITMASK);       Graphics2D tg = (Graphics2D)tiles[i].getGraphics();       tg.setComposite(AlphaComposite.Src);       tg.drawImage(img,             0,0,             32,32,             i*32,0,             i*32+32,32,             null);       tg.dispose(); }

The snipped above slices a 192x32 image into 6 32x32 images.

Yes. It's really that simple

[Serethos]

it doesnt work for me properly. first i got only disturbed images, then i tried to get it work for only one tile and used the following code.

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public void paint(Graphics g)       {             BufferedImage frame;             Graphics2D g2D = (Graphics2D)g;                                           GraphicsEnvironment       ge = GraphicsEnvironment.getLocalGraphicsEnvironment();           GraphicsDevice                   gs = ge.getDefaultScreenDevice();           GraphicsConfiguration       gc = gs.getDefaultConfiguration();                                     frame = gc.createCompatibleImage(32,32,Transparency.BITMASK);             Graphics2D tg = (Graphics2D)frame.getGraphics();             tg.setComposite(AlphaComposite.Src);             tg.drawImage(img,0,0,32,32,32,0,32,32,null);                         tg.dispose();             g2D.drawImage(frame, 0, 0, this);             }

// img is a valid bufferedimage

but it seems that im not able to adept your code. all i see is a rectangle of white nothing ... =)
i tried it with painting the whole image and a scaled version: therefore it works. for any reason i get no image painted with passing the four corners as parameters...

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[oNyx]

tg.drawImage(img,
 0,0, //dx1, dy1 (upper left corner)
 32,32, //dx2, dy2 (lower right corner)
 i*32,0, //sx1, sy1 (upper left corner)
 i*32+32,32, //sx2, sy2 (lower right corner
 null);

see here

d=destination s=source

Use pen and paper to sketch it out... it isn't that complicated once you got your head around

You can test my snipped from before with this image:

[Serethos]

ohhh... once upon a time a wiseman said

"read the f**king manual!"

thought the corners were ment clockwise ...
but i havent said anything ...

[oNyx]

> but i havent said anything ...

Well, you said "four corners" that was a bit odd, since there has to be two pairs

Together with the problem you described and that piece of code wich just must result in something strange I gathered enough hints to spot your problem.

Don't forget to post your game once it's done