Completed clue7

src/clue7/Main.java

@@ -0,0 +1,102 @@
+package clue7;
+
+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 {
+			RawReader reader = new RawReader("clue7.tri");
+			if (!reader.assertByte(187))
+				System.out.println("Incorrect identifier byte!");
+			else {
+				if (!(reader.assertByte('T') && reader.assertByte('R') && reader.assertByte('I')))
+					System.out.println("Could not locate 'TRI' signature");
+				else {
+					if (!reader.assertByte(2))
+						System.out.println("Incorrect format version!");
+					else {
+						int width = reader.readInt();
+						int height = reader.readInt();
+						int[] output = new int[width * height];
+
+						// Unused color information byte
+						reader.readByte();
+
+						int[] patternTable = new int[255 * 8 / 4];
+						for (int i = 0; i < patternTable.length; ++i)
+							patternTable[i] = reader.readInt();
+
+						for (int j = 0; j < height; j += 8) {
+							for (int i = 0; i < width; i += 8) {
+								int patternIndex = reader.readByte();
+								int color = (0xFF              << 24)
+										| (reader.readByte() << 16)
+										| (reader.readByte() <<  8)
+										| (reader.readByte() <<  0);
+								if (patternIndex == 0)
+									for (int x = 0; x < 8; ++x)
+										for (int y = 0; y < 8; ++y)
+											output[i + x + (j + y) * width] = color;
+								else {
+									int color2 = (0xFF              << 24)
+											| (reader.readByte() << 16)
+											| (reader.readByte() <<  8)
+											| (reader.readByte() <<  0);
+									for (int k = 0; k < 64; ++k) {
+										int intIndex = k / 32;
+										int bitIndex = k % 32;
+										boolean colorSelection = ((patternTable[(patternIndex - 1) * 2  + intIndex] >> (32 - bitIndex)) & 1) == 1;
+
+										int x = k % 8;
+										int y = k / 8;
+										output[i + x + (j + y) * width] = (!colorSelection ? color : color2);
+									}
+								}
+							}
+						}
+
+						BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
+						image.setRGB(0, 0, width, height, output, 0, width);
+						ImageIO.write(image, "png", new File("clue7_output.png"));
+					}
+				}
+			}
+			reader.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+
+	private static class RawReader {
+
+		private FileInputStream stream;
+
+		public RawReader(String path) throws IOException {
+			stream = new FileInputStream(path);
+		}
+
+		public boolean assertByte(int b) throws IOException {
+			return stream.read() == b;
+		}
+
+		public int readByte() throws IOException {
+			return stream.read();
+		}
+
+		public int readInt() throws IOException {
+			return (stream.read() << 32)
+					| (stream.read() << 16)
+					| (stream.read() <<  8)
+					| (stream.read() <<  0);
+		}
+
+		public void close() throws IOException {
+			stream.close();
+		}
+	}
+}