rotate()

public void rotate() {
        long startTime = System.nanoTime();
        newPixels = new int[width * height];
        for (int x = 0; x < width; x++) {
            int offset = x * height;
            for (int y = 0; y < height; y++) {
                newPixels[offset + y] = pixels[y * width + x];
            }
        }
        for (int x = 0; x < width; x++) {
            int offset = x * height;
            for (int y = 0; y < height; y++) {
                pixels[offset + y] = newPixels[offset + height - 1 - y];
            }
        }
        int tmp = width;
        width = height;
        height = tmp;
        long finishTime = System.nanoTime();
        Log.i("TIME", "RotateTime: " + (finishTime - startTime) / 1000000);
    }