[PATCH] enable Graphics2D at configure and runtime

[graydon hoare]

hi,

this patch provides a new bit of configury (--enable-gtk-cairo) and a 
runtime system property ("gnu.java.awt.peer.gtk.Graphics" == "Graphics" 
or "Graphics2D") which permits the cairo/graphics2d code I've been 
working on to coexist with the existing GTK peers and GDK Graphics 
object, as an option at both compile and runtime.

I'm sure there'll be a few suggestions about how "best" to do this, so I 
just picked what seemed like an unintrusive method and implemented it, 
to make sure it's even possible. any suggestions on how to do it better?

if not, is it ok to apply?

(asking both classpath and gcj here, though the patch is against gcj 
configury, I'd port it to classpath pretty much directly)

-graydon

2003-12-16  Graydon Hoare  <graydon@redhat.com>

	* configure.in: Add --enable-gtk-cairo check.
	* Makefile.am: Conditionally link against cairo.
	* gnu/java/awt/peer/gtk/GtkToolkit.java (useGraphics2D): New method.
	(getFontMetrics, getClasspathFontPeer):
	* gnu/java/awt/peer/gtk/GtkCanvasPeer.java (getGraphics):
	* gnu/java/awt/peer/gtk/GtkComponentPeer.java (createImage):
	* gnu/java/awt/peer/gtk/GtkContainerPeer.java (getGraphics):
	* gnu/java/awt/peer/gtk/GtkFramePeer.java (getGraphics):
	Switch behavior depending on GtkToolkit.useGraphics2D().	
	* gnu/java/awt/peer/gtk/GtkFontPeer.java: Extend ClasspathFontPeer.
	* java/awt/Font.java: Switch to peer model.
	* jni/gtk-peer/gtkcairopeer.h: Definitions of cairo stuff.
	* jni/gtk-peer/gdkfont.h: Include gtkcairopeer.h.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GdkGraphics2D.c: Include 
gtkcairopeer.h.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GdkClasspathFontPeerMetrics.c: 
Un-include gtkpeer.h.
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