FileIO.java

package Game;

import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

public class FileIO {
	/*
	 * Loads an image from an image file
	 * 
	 * @param imageName - the file path to the image
	 * 
	 * @return the image loaded
	 */
	public static BufferedImage loadImage(String imageName){
		BufferedImage image;
		try
		{
			image = ImageIO.read(Images.class.getResourceAsStream(imageName));
			BufferedImage img = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_ARGB);
			Graphics g = img.getGraphics();
			g.drawImage(image, 0, 0, null);
			g.dispose();
			image = img;
		}
		catch (IOException e)
		{
			e.printStackTrace();
			return null;
		}
		return image;
	}
	/*
	 * Loads a 2d array of images from an image file
	 * 
	 * @param imageName - the file path to the base image
	 * @param sliceWidth - the width of each subimage to be taken from the main image
	 * @param sliceHeight - the hieght of each subimage to be taken from the main image
	 * 
	 * @return A 2d array of bufferedImages
	 */
	public static BufferedImage[][] loadSpriteSheet(String imageName, int sliceWidth, int sliceHeight){
		//System.out.println("Starting image cut for "+imageName);
				long temp = System.currentTimeMillis();
				BufferedImage sheet;
				try
				{
					sheet = ImageIO.read(Images.class.getResourceAsStream(imageName));
				}
				catch (IOException e)
				{
					e.printStackTrace();
					return null;
				}

				int w = sheet.getWidth();
				int h = sheet.getHeight();

				int xSlices = w/sliceWidth;
				int ySlices = h/sliceHeight;

				BufferedImage[][] images = new BufferedImage[xSlices][ySlices];
				for (int x=0; x<xSlices; x++)
					for (int y=0; y<ySlices; y++)
					{
						BufferedImage img = new BufferedImage(sliceWidth, sliceHeight, BufferedImage.TYPE_INT_ARGB);
						Graphics g = img.getGraphics();
						g.drawImage(sheet, -x*sliceWidth, -y*sliceHeight, null);
						g.dispose();
						images[x][y] = img;
					}

				//System.out.println("Done cutting image for "+imageName+". Total time spent on cut = "+(System.currentTimeMillis()-temp));
				return images;
	}
}