gistfile1.txt

  size_t width = image.height;
  size_t height = image.width3;

  char** pixels = (char**) calloc(height, sizeof(char*));
  for (int i = 0; i < width; i ++) {
    pixels[i] = (char*) calloc(width, sizeof(char));
  }

  for (int i = 0; i < height; i++) {
    for (int j = 0; j < width; j++) {
      int y = height - i - 1;
      int x = width - j - 1;
      pixels[y][x] = image.array[width * i - 1 + j] //initial_pixels[i][j];
    }
  }
  
  for (int i = 0; i < height; i++) {
    for (int j = 0; j < width; j++) {
      image.array[width * i -1 + j] = pixels[i][j];
    }
  }