source: trunk/src/gcc/libjava/gnu/awt/xlib/XGraphics.java@ 2

/* Copyright (C) 2000  Free Software Foundation

   This file is part of libgcj.

This software is copyrighted work licensed under the terms of the
Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
details.  */

package gnu.awt.xlib;

import java.awt.*;
import java.awt.image.WritableRaster;
import java.awt.image.Raster;
import java.awt.image.DataBuffer;
import java.awt.image.ColorModel;
import java.awt.image.ImageObserver;
import java.awt.image.BufferedImage;
import gnu.gcj.xlib.GC;
import gnu.gcj.xlib.XImage;
import gnu.gcj.xlib.Drawable;
import gnu.gcj.xlib.Window;
import gnu.gcj.xlib.Drawable;
import gnu.gcj.xlib.Visual;
import gnu.awt.j2d.DirectRasterGraphics;
import gnu.awt.j2d.MappedRaster;

public class XGraphics implements Cloneable, DirectRasterGraphics
{
  static class XRaster extends MappedRaster
  {
    XImage ximage;
    
    public XRaster(WritableRaster raster, XImage ximage, ColorModel cm)
    {
      super(raster, cm);
      this.ximage = ximage;
    }
  }
  
  GC context;
  XGraphicsConfiguration config;
  Rectangle clipBounds;
    
  XFontMetrics metrics;


  public Object clone()
  {
    XGraphics gfxCopy = (XGraphics) super.clone();
    gfxCopy.context = context.create();
    
    return gfxCopy;
  }

  public void dispose()
  {
    GC lContext = context;
    context = null;
    config = null;
    clipBounds = null;
    
    if (lContext != null)
      {
        lContext.dispose();
      }     
  }

  public XGraphics(Drawable drawable, XGraphicsConfiguration config)
  {
    context = new GC(drawable);
    this.config = config;
  }  
  
  public void setColor(Color color)
  {
    context.setForeground(config.getPixel(color));
  }

  public void setPaintMode()
  {
    throw new UnsupportedOperationException("not implemented");
  }

  public void setXORMode(Color c1)
  {
    throw new UnsupportedOperationException("not implemented");
  }
    
  public void setFont(Font font)
  {
    if ((metrics != null) && font.equals(metrics.getFont())) return;

    metrics = config.getXFontMetrics(font);
    context.setFont(metrics.xfont);
  }
    
  public FontMetrics getFontMetrics(Font font)
  {
    if ((metrics != null) && font.equals(metrics.getFont()))
      return metrics;
    
    return config.getXFontMetrics(font);
  }
    
  public void setClip(int x, int y, int width, int height)
  {
    Rectangle[] rects = { new Rectangle(x, y, width, height) };
    context.setClipRectangles(rects);
  }
    
  public void setClip(Shape clip)
  {
    /* TODO: create a special RectangleUnion shape that can be
       used to draw advantage of the GCs ability to set multiple
       rectangles. 
    */

    /* FIXME: creating all these objects is wasteful and can be
       costly in the long run, since this code is run at every
       expose. */
    Rectangle newClipBounds = clip.getBounds();
    
    if ((clipBounds != null) && !clipBounds.contains(newClipBounds))
      {
        System.err.println("warning: old clip ("+ clipBounds +") does " +
                           "not fully contain new clip (" +
                           newClipBounds + ")");
      }
    clipBounds = newClipBounds;
    Rectangle[] rects = { clipBounds };
    context.setClipRectangles(rects);
  }