Completed clue0

src/clue0/Main.java

@@ -0,0 +1,60 @@
+package clue0;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+
+public class Main {
+
+	public static void main(String[] args) {
+		try {
+			FileInputStream stream = new FileInputStream("clue0.png");
+			BufferedImage image = ImageIO.read(stream);
+			int width  = image.getWidth();
+			int height = image.getHeight();
+			int[] raw  = image.getRGB(0, 0, width, height, null, 0, width);
+			int[] output = new int[width * height];
+			int[] shiftVert = new int[width];
+			int[] shiftHorz = new int[height];
+
+			for (int i = 0; i < height; ++i) {
+				shiftHorz[i] = -1;
+				while (raw[i * width + ++shiftHorz[i]] != 0xFF0000FF && raw[i * width + shiftHorz[i]] != 0xFFFF00FF);
+			}
+
+			for (int i = 0; i < width; ++i) {
+				for (int j = 0; j < height; ++j) {
+					output[j * width + i] = raw[j * width + rotate(i, shiftHorz[j], width)];
+				}
+			}
+
+			int[] temp = raw;
+			raw = output;
+			output = temp;
+
+			for (int i = 0; i < width; ++i) {
+				shiftVert[i] = -1;
+				while (raw[i + (++shiftVert[i] * width)] != 0xFFFF0000 && raw[i + (shiftVert[i] * width)] != 0xFFFF00FF);
+			}
+
+			for (int i = 0; i < width; ++i) {
+				for (int j = 0; j < height; ++j) {
+					output[j * width + i] = raw[rotate(j, shiftVert[i], height) * width + i];
+				}
+			}
+
+			image.setRGB(0, 0, width, height, output, 0, width);
+			ImageIO.write(image, "png", new File("clue0_output.png"));
+
+			stream.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+
+	public static int rotate(int index, int shift, int mod) {
+		return (((index % mod + shift % mod) % mod) + mod) % mod;
+	}
+}