Npatch.java

package hello.dcsms.omzen;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;

import android.graphics.Rect;

public class Npatch {

	public static final int NO_COLOR = 0x00000001;
	public static final int TRANSPARENT_COLOR = 0x00000000;

	public final Rect mPaddings = new Rect();

	public int mDivX[];
	public int mDivY[];
	public int mColor[];

	private static void readIntArray(final int[] data, final ByteBuffer buffer) {
		for (int i = 0, n = data.length; i < n; ++i) {
			data[i] = buffer.getInt();
		}
	}

	private static void checkDivCount(final int length) {
		if (length == 0 || (length & 0x01) != 0)
			throw new RuntimeException("invalid nine-patch: " + length);
	}

	public static Npatch deserialize(final byte[] data) {
		final ByteBuffer byteBuffer = ByteBuffer.wrap(data).order(
				ByteOrder.nativeOrder());

		if (byteBuffer.get() == 0)
			return null; // is not serialized

		final Npatch chunk = new Npatch();
		chunk.mDivX = new int[byteBuffer.get()];
		chunk.mDivY = new int[byteBuffer.get()];
		chunk.mColor = new int[byteBuffer.get()];

		checkDivCount(chunk.mDivX.length);
		checkDivCount(chunk.mDivY.length);

		// skip 8 bytes
		byteBuffer.getInt();
		byteBuffer.getInt();

		chunk.mPaddings.left = byteBuffer.getInt();
		chunk.mPaddings.right = byteBuffer.getInt();
		chunk.mPaddings.top = byteBuffer.getInt();
		chunk.mPaddings.bottom = byteBuffer.getInt();

		// skip 4 bytes
		byteBuffer.getInt();

		readIntArray(chunk.mDivX, byteBuffer);
		readIntArray(chunk.mDivY, byteBuffer);
		readIntArray(chunk.mColor, byteBuffer);

		return chunk;
	}
}