xgraphicsconfiguration.java

gcc的JAVA模块的源代码

  void calcZPixmapModels(int bitsPerPixel)
  {
    switch (visual.getVisualClass())
      {
      case Visual.VC_TRUE_COLOR:
	calcDecomposedRGBModels(bitsPerPixel);
	break;
      case Visual.VC_PSEUDO_COLOR:
	calcPseudoColorModels(bitsPerPixel);
	break;
      default:
	String msg = "unimplemented visual class";
	throw new UnsupportedOperationException(msg);
      }
  }
    
  void calcDecomposedRGBModels(int bitsPerPixel)
  {
    int dataType = Buffers.smallestAppropriateTransferType(bitsPerPixel);
    
    
    if (DataBuffer.getDataTypeSize(dataType) == bitsPerPixel)
      {	
	ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
	
	imageCM = new DirectColorModel(cs,
				       visual.getDepth(),
				       visual.getRedMask(),
				       visual.getGreenMask(),
				       visual.getBlueMask(),
				       0, // no alpha
				       false,
				       dataType);
      }
    else
      {
	throw new
	  UnsupportedOperationException("unimplemented bits per pixel");
      }
    }
    
  void calcPseudoColorModels(int bitsPerPixel)
  {
    if (colormap == null)
      colormap = visual.getScreen().getDefaultColormap();
    
    XColor[] colArray = colormap.getXColors();
	
    int numCol = colArray.length;
    byte[] rmap = new byte[numCol];
    byte[] gmap = new byte[numCol];
    byte[] bmap = new byte[numCol];
    byte[] amap = new byte[numCol];
    
    for (int i=0; i < numCol; i++)
      {
	XColor color = colArray[i];
	if (color.getFlags() == Colormap.FLAG_SHARED)
	  {
	    rmap[i] = (byte) (color.getRed()   >> 8);
	    gmap[i] = (byte) (color.getGreen() >> 8);
	    bmap[i] = (byte) (color.getBlue()  >> 8);
	    amap[i] = (byte) 0xff;
	  } // else, leave default zero values...
      }

    imageCM = new IndexColorModel(visual.getDepth(), numCol,
				  rmap, gmap, bmap, amap);
  }

  /**
   * Gets the associated device that this configuration describes.
   *
   * @return the device
   */
  public GraphicsDevice getDevice()
  {
    throw new UnsupportedOperationException("not implemented");  
  }

  /**
   * Returns a buffered image optimized to this device, so that blitting can
   * be supported in the buffered image.
   *
   * @param w the width of the buffer
   * @param h the height of the buffer
   * @return the buffered image, or null if none is supported
   */
  public BufferedImage createCompatibleImage(int width,
					     int height,
					     int transparency)
  {
    throw new UnsupportedOperationException("not implemented");
  }

  /**
   * Returns a buffered volatile image optimized to this device, so that
   * blitting can be supported in the buffered image. Because the buffer is
   * volatile, it can be optimized by native graphics accelerators.
   *
   * @param w the width of the buffer
   * @param h the height of the buffer
   * @return the buffered image, or null if none is supported
   * @see Component#createVolatileImage(int, int)
   * @since 1.4
   */
  public VolatileImage createCompatibleVolatileImage(int w, int h)
  {
    throw new UnsupportedOperationException("not implemented");
  }

  /**
   * FIXME: I'm not sure which color model that should be returned here.
   */
  public ColorModel getColorModel()
  {
    if (pixelCM == null)
      preparePixelCM();
    return pixelCM;
  }

  void preparePixelCM()
  {
    switch (visual.getVisualClass())
      {
      case Visual.VC_TRUE_COLOR:
	pixelCM = new DirectColorModel(visual.getDepth(),
				       visual.getRedMask(),
				       visual.getGreenMask(),
				       visual.getBlueMask());
	break;
      case Visual.VC_PSEUDO_COLOR:

	if (colormap == null)
	  colormap = visual.getScreen().getDefaultColormap();
	
	XColor[] colArray = colormap.getXColors();
	
	int numCol = colArray.length;
	byte[] rmap = new byte[numCol];
	byte[] gmap = new byte[numCol];
	byte[] bmap = new byte[numCol];
	byte[] amap = new byte[numCol];
	
	for (int i=0; i < numCol; i++)
	  {
	    XColor color = colArray[i];
	    if (color.getFlags() == Colormap.FLAG_SHARED) {
	      rmap[i] = (byte) (color.getRed()   >> 8);
	      gmap[i] = (byte) (color.getGreen() >> 8);
	      bmap[i] = (byte) (color.getBlue()  >> 8);
	      amap[i] = (byte) 0xff;
	    } // else, leave default zero values...

	  }

	pixelCM = new IndexColorModel(visual.getDepth(), numCol,
				      rmap, gmap, bmap, amap);
	break;
      default:
	throw new UnsupportedOperationException("not implemented");
      }
  }
  
  public ColorModel getColorModel(int transparency)
  {
    throw new UnsupportedOperationException("not implemented");
  }
    
  public AffineTransform getDefaultTransform()
  {
    throw new UnsupportedOperationException("not implemented");
  }

  public AffineTransform getNormalizingTransform()
  {
    throw new UnsupportedOperationException("not implemented");
  }
 
  public Rectangle getBounds()
  {
    throw new UnsupportedOperationException("not implemented");
  }

  Visual getVisual()
  {
    return visual;
  }
    
  /* FIXME: This should be moved to XGraphicsDevice... */
  XFontMetrics getXFontMetrics (java.awt.Font awtFont)
  {
    // If the metrics object for this font is already cached, use it.
    // Otherwise create and cache it.
    Display display = visual.getScreen ().getDisplay ();
    XFontMetrics fm = fontMetricsCache.get (awtFont,display);
    if (fm == null)
    {
      String foundry      = "*";
      String family       = awtFont.getName ();
      String weight       = awtFont.isBold () ? "bold" : "medium";
      String slant        = awtFont.isItalic () ? "i" : "r";
      String sWidth       = "*";
      String addStyle     = "";
      String pixelSize    = "*";
      String pointSize    = awtFont.getSize () + "0";
      String xres         = "*";
      String yres         = "*";
      String spacing      = "*";
      String averageWidth = "*";
      String charset      = "iso10646-1"; // because we use functions like XDrawString16
      
      String logicalFontDescription =
        "-" + // FontNameRegistry prefix
        foundry   + "-" + family    + "-" + weight       + "-" +
        slant     + "-" + sWidth    + "-" + addStyle     + "-" +
        pixelSize + "-" + pointSize + "-" + xres         + "-" +
        yres      + "-" + spacing   + "-" + averageWidth + "-";
      
      // Try to load a Unicode font.  If that doesn't work, try again, without
      // specifying the character set.
      try
      {
        gnu.gcj.xlib.Font xfont = new gnu.gcj.xlib.Font (display, logicalFontDescription + charset);
        fm = new XFontMetrics (xfont, awtFont);
      }
      catch (XException e)
      {
        gnu.gcj.xlib.Font xfont = new gnu.gcj.xlib.Font (display, logicalFontDescription + "*-*");
        fm = new XFontMetrics (xfont, awtFont);
      }
      fontMetricsCache.put (awtFont,display,fm);
    }
    return fm;
  }

  int getPixel(Color color)
  {
    /* FIXME: consider an integer technique whenever
     * the ColorModel is 8 bits per color.
     * The problem with using integers is that it doesn't work unless
     * the colors are 8 bits each (as in the array), since ColorModel.getDataElement(int[],int)
     * expects non-normalized values.  For example, in a 16-bit display mode, you
     * would typically have 5 bits each for red and blue, and 6 bits for green.
    int[] components =
    {
      color.getRed (),
      color.getGreen (),
      color.getBlue (),
      0xff
    };
     */
    
    float[] normalizedComponents =
    {
      ((float)color.getRed ()) / 255F,
      ((float)color.getGreen ()) / 255F,
      ((float)color.getBlue ()) / 255F,
      1
    };
    int[] unnormalizedComponents = { 0, 0, 0, 0xff };
    ColorModel cm = getColorModel ();
    cm.getUnnormalizedComponents(normalizedComponents, 0,
				 unnormalizedComponents, 0);
    return cm.getDataElement (unnormalizedComponents, 0);
  }
}