Method pixelFromRGB

java/com/tigervnc/rfb/PixelFormat.java:181–212

(int red, int green, int blue, ColorModel cm)

  }

  public int pixelFromRGB(int red, int green, int blue, ColorModel cm)
  {
    if (trueColour) {
      int r = (red   * redMax     + 32767) / 65535;
      int g = (green * greenMax   + 32767) / 65535;
      int b = (blue  * blueMax    + 32767) / 65535;

      return (r << redShift) | (g << greenShift) | (b << blueShift);
    } else if (cm != null) {
      // Try to find the closest pixel by Cartesian distance
      int colours = 1 << depth;
      int diff = 256 * 256 * 4;
      int col = 0;
      for (int i=0; i<colours; i++) {
        int r, g, b;
        r = cm.getRed(i);
        g = cm.getGreen(i);
        b = cm.getBlue(i);
        int rd = (r-red) >> 8;
        int gd = (g-green) >> 8;
        int bd = (b-blue) >> 8;
        int d = rd*rd + gd*gd + bd*bd;
        if (d < diff) {
          col = i;
          diff = d;
        }
      }
      return col;
    }
    // XXX just return 0 for colour map?
    return 0;
  }

  // This method should be invoked with duplicates of dst/src Buffers
  public void bufferFromRGB(ByteBuffer dst, ByteBuffer src, int pixels)