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	/*
	* Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package sun.awt.image;

	import java.awt.AWTException;
	import java.awt.Component;
	import java.awt.Graphics2D;
	import java.awt.GraphicsConfiguration;
	import java.awt.GraphicsDevice;
	import java.awt.ImageCapabilities;
	import java.awt.Rectangle;
	import java.awt.Transparency;
	import java.awt.geom.AffineTransform;
	import java.awt.image.BufferedImage;
	import java.awt.image.ColorModel;
	import java.awt.image.DirectColorModel;
	import java.awt.image.Raster;
	import java.awt.image.VolatileImage;
	import java.awt.image.WritableRaster;

	public class BufferedImageGraphicsConfig
	extends GraphicsConfiguration
	{
	private static final int numconfigs = BufferedImage.TYPE_BYTE_BINARY;
	private static BufferedImageGraphicsConfig configs[] =
	new BufferedImageGraphicsConfig[numconfigs];

	public static BufferedImageGraphicsConfig getConfig(BufferedImage bImg) {
	BufferedImageGraphicsConfig ret;
	int type = bImg.getType();
	if (type > 0 && type < numconfigs) {
	ret = configs[type];
	if (ret != null) {
	return ret;
	}
	}
	ret = new BufferedImageGraphicsConfig(bImg, null);
	if (type > 0 && type < numconfigs) {
	configs[type] = ret;
	}
	return ret;
	}

	GraphicsDevice gd;
	ColorModel model;
	Raster raster;
	int width, height;

	public BufferedImageGraphicsConfig(BufferedImage bufImg, Component comp) {
	if (comp == null) {
	this.gd = new BufferedImageDevice(this);
	} else {
	Graphics2D g2d = (Graphics2D)comp.getGraphics();
	this.gd = g2d.getDeviceConfiguration().getDevice();
	}
	this.model = bufImg.getColorModel();
	this.raster = bufImg.getRaster().createCompatibleWritableRaster(1, 1);
	this.width = bufImg.getWidth();
	this.height = bufImg.getHeight();
	}

	/**
	* Return the graphics device associated with this configuration.
	*/
	public GraphicsDevice getDevice() {
	return gd;
	}

	/**
	* Returns a BufferedImage with channel layout and color model
	* compatible with this graphics configuration. This method
	* has nothing to do with memory-mapping
	* a device. This BufferedImage has
	* a layout and color model
	* that is closest to this native device configuration and thus
	* can be optimally blitted to this device.
	*/
	public BufferedImage createCompatibleImage(int width, int height) {
	WritableRaster wr = raster.createCompatibleWritableRaster(width, height);
	return new BufferedImage(model, wr, model.isAlphaPremultiplied(), null);
	}

	/**
	* Returns the color model associated with this configuration.
	*/
	public ColorModel getColorModel() {
	return model;
	}

	/**
	* Returns the color model associated with this configuration that
	* supports the specified transparency.
	*/
	public ColorModel getColorModel(int transparency) {

	if (model.getTransparency() == transparency) {
	return model;
	}
	switch (transparency) {
	case Transparency.OPAQUE:
	return new DirectColorModel(24, 0xff0000, 0xff00, 0xff);
	case Transparency.BITMASK:
	return new DirectColorModel(25, 0xff0000, 0xff00, 0xff, 0x1000000);
	case Transparency.TRANSLUCENT:
	return ColorModel.getRGBdefault();
	default:
	return null;
	}
	}

	/**
	* Returns the default Transform for this configuration. This
	* Transform is typically the Identity transform for most normal
	* screens. Device coordinates for screen and printer devices will
	* have the origin in the upper left-hand corner of the target region of
	* the device, with X coordinates
	* increasing to the right and Y coordinates increasing downwards.
	* For image buffers, this Transform will be the Identity transform.
	*/
	public AffineTransform getDefaultTransform() {
	return new AffineTransform();
	}

	/**
	*
	* Returns a Transform that can be composed with the default Transform
	* of a Graphics2D so that 72 units in user space will equal 1 inch
	* in device space.
	* Given a Graphics2D, g, one can reset the transformation to create
	* such a mapping by using the following pseudocode:
	* <pre>
	* GraphicsConfiguration gc = g.getGraphicsConfiguration();
	*
	* g.setTransform(gc.getDefaultTransform());
	* g.transform(gc.getNormalizingTransform());
	* </pre>
	* Note that sometimes this Transform will be identity (e.g. for
	* printers or metafile output) and that this Transform is only
	* as accurate as the information supplied by the underlying system.
	* For image buffers, this Transform will be the Identity transform,
	* since there is no valid distance measurement.
	*/
	public AffineTransform getNormalizingTransform() {
	return new AffineTransform();
	}

	public Rectangle getBounds() {
	return new Rectangle(0, 0, width, height);
	}
	}

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