code: public static ImageBuffer createImageBuffer(int width, int height, ColorRgba transparency)
      {
          return factoryGraphic.createImageBuffer(width, height, transparency);
      }
docs: Create an image buffer.
  
  @param width The image width (must be strictly positive).
  @param height The image height (must be strictly positive).
  @param transparency The color transparency (must not be <code>null</code>).
  @return The image buffer.
  @throws LionEngineException If invalid arguments.