package bmsi.tui;
import java.awt.Color;
import java.awt.image.ColorModel;

/** ColorModel for monochrome terminals.
 * Colors are black, gray, white, and transparent.
 */

public class TUIColorModel extends ColorModelPeer {
  public TUIColorModel() { super(2); }
  private static short[] alpha = { 255,255,255,0 };
  private static short[] bright = { 0, 127, 255, 0 };
  public int getAlpha(int pixel) { return alpha[pixel]; }
  public int getBlue(int pixel) { return bright[pixel]; }
  public int getRed(int pixel) { return bright[pixel]; }
  public int getGreen(int pixel) { return bright[pixel]; }
  static int getGrayLevel(Color c) {
    int red = c.getRed();
    int blue = c.getBlue();
    int green = c.getGreen();
    return (red + blue + blue + green) / 4;
  }
  public int getPixel(Color c) {
    return getGrayLevel(c) / 100;
  }
}