1 files changed, 113 insertions, 0 deletions
diff --git a/libjava/gnu/gcj/xlib/GC.java b/libjava/gnu/gcj/xlib/GC.java
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+++ b/libjava/gnu/gcj/xlib/GC.java
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+/* 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.gcj.xlib;
+
+import gnu.gcj.RawData;
+import java.awt.Rectangle;
+
+/**
+ * An X11 graphics context.  Unlike a traditional X11 graphics
+ * context, the target drawable is part of the GC state.
+ *
+ * Implementation notes: There is no need to do coalescing of changes
+ * since Xlib will do this for us.  The implementation relies on the
+ * Xlib GC cache and will not try to be clever.
+ *
+ * @author Rolf W. Rasmussen <rolfwr@ii.uib.no>
+ */
+public class GC implements Cloneable
+{
+  
+  public GC(Drawable target)
+  {
+    this.target = target;
+    initStructure(null);
+  }
+
+  public Object clone()
+  {
+    GC gcClone = (GC) super.clone();
+    gcClone.structure = null;
+    gcClone.initStructure(this);
+    gcClone.updateClip();
+    return gcClone;
+  }
+
+  private native void initStructure(GC copyFrom);
+
+  public GC create()
+  {
+    return (GC) clone();
+  }
+
+  public void finalize()
+  {
+    disposeImpl();
+  }
+
+  public void dispose()
+  {
+    disposeImpl();
+  }
+
+  public synchronized native void disposeImpl();
+
+  public native void setForeground(long pixel);
+  public native void setFont(gnu.gcj.xlib.Font font);
+
+  /**
+   * Set the clip region for the graphics operations performed by the
+   * GC.
+   *
+   * This is one of the few costly operations of this class.  It is
+   * suggested that the clip is only set or changed if really
+   * necessary.  Higher level APIs can make such optimizations
+   * transparent.
+   *
+   * @param rectangles the union of these rectangles describe the clip
+   * region.
+   */
+  public void setClipRectangles(Rectangle[] rectangles)
+  {
+    clip = new Clip(rectangles);
+    updateClip();
+  }
+
+  public native void drawString(String text, int x, int y);
+  public native void drawLine(int x1, int y1, int x2, int y2);
+  public native void drawRectangle(int x, int y, int w, int h);
+
+  public native void fillRectangle(int x, int y, int w, int h);
+
+  /** 
+   * 
+   * Clear area using the background pixel or pixmap of the drawable.
+   * Note that this operation does not adhere to the current clip.
+   */
+  public native void clearArea(int x, int y, int w, int h,
+			       boolean exposures);
+
+
+  public native void putImage(XImage image,
+			      int srcX, int srcY,
+			      int destX, int destY,
+			      int width, int height);
+
+  public Drawable getDrawable()
+  {
+    return target;
+  }
+
+  private native void updateClip();
+
+  private Drawable target;
+  private RawData structure;
+  private Clip clip;
+}
+