How can i get the real color in 2d game?

Hey, I see you tried the wonderful Propotyp project.

In fact, you just suffer from the correction of BUG http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6879279 from JDK 1.6.0_18.

Indeed they changed the type for PNG images so you have to convert back RGBA components.

For example, I do:

Code:

buffImage = ImageIO.read(cl.getResource(path));
final byte[] data = ((DataBufferByte) buffImage.getRaster().getDataBuffer()).getData();
switch (buffImage.getType()) {
case BufferedImage.TYPE_4BYTE_ABGR:
convertFromARGBToBGRA(data);
break;
case BufferedImage.TYPE_3BYTE_BGR:
convertFromBGRToRGB(data);
break;
}
...

private static void convertFromARGBToBGRA(final byte[] data) {
final int size = data.length;
for (int i = 0; i < size; i += 4) {
final int a = data[i] & 0x000000FF;
final int r = data[i + 1] & 0x000000FF;
final int g = data[i + 2] & 0x000000FF;
final int b = data[i + 3] & 0x000000FF;

data[i] = (byte) b;
data[i + 1] = (byte) g;
data[i + 2] = (byte) r;
data[i + 3] = (byte) a;
}
}

private static void convertFromBGRToRGB(final byte[] data) {
final int size = data.length;
for (int i = 0; i < size; i += 3) {
final int b = data[i] & 0xFF;
final int g = data[i + 1] & 0xFF;
final int r = data[i + 2] & 0xFF;

data[i] = (byte) r;
data[i + 1] = (byte) g;
data[i + 2] = (byte) b;
}
}