/*

 * 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

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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);

    }

}