/*

 * Copyright (c) 2006, 2014, 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;

import java.awt.*;

import java.awt.color.*;

import java.awt.image.*;

import sun.awt.image.ToolkitImage;

import sun.awt.image.ImageRepresentation;

import java.util.Arrays;

public class IconInfo {

    /**

     * Representation of image as an int array.

     * It's used on platforms where icon data

     * is expected to be in 32-bit format.

     */

    private int[] intIconData;

    /**

     * Representation of image as an long array.

     * It's used on platforms where icon data

     * is expected to be in 64-bit format.

     */

    private long[] longIconData;

    /**

     * Icon image.

     */

    private Image image;

    /**

     * Width of icon image. Being set in constructor.

     */

    private final int width;

    /**

     * Height of icon image. Being set in constructor.

     */

    private final int height;

    /**

     * Width of scaled icon image. Can be set in setScaledDimension.

     */

    private int scaledWidth;

    /**

     * Height of scaled icon image. Can be set in setScaledDimension.

     */

    private int scaledHeight;

    /**

     * Length of raw data. Being set in constructor / setScaledDimension.

     */

    private int rawLength;

    public IconInfo(int[] intIconData) {

        this.intIconData =

            (null == intIconData) ? null : Arrays.copyOf(intIconData, intIconData.length);

        this.width = intIconData[0];

        this.height = intIconData[1];

        this.scaledWidth = width;

        this.scaledHeight = height;

        this.rawLength = width * height + 2;

    }

    public IconInfo(long[] longIconData) {

        this.longIconData =

        (null == longIconData) ? null : Arrays.copyOf(longIconData, longIconData.length);

        this.width = (int)longIconData[0];

        this.height = (int)longIconData[1];

        this.scaledWidth = width;

        this.scaledHeight = height;

        this.rawLength = width * height + 2;

    }

    public IconInfo(Image image) {

        this.image = image;

        if (image instanceof ToolkitImage) {

            ImageRepresentation ir = ((ToolkitImage)image).getImageRep();

            ir.reconstruct(ImageObserver.ALLBITS);

            this.width = ir.getWidth();

            this.height = ir.getHeight();

        } else {

            this.width = image.getWidth(null);

            this.height = image.getHeight(null);

        }

        this.scaledWidth = width;

        this.scaledHeight = height;

    }

    /*

     * It sets size of scaled icon.

     */

    public void setScaledSize(int width, int height) {

        this.scaledWidth = width;

        this.scaledHeight = height;

    }

    public boolean isValid() {

        return (width > 0 && height > 0);

    }

    public int getWidth() {

        return width;

    }

    public int getHeight() {

        return height;

    }

    public String toString() {

        return "IconInfo[w=" + width + ",h=" + height + ",sw=" + scaledWidth + ",sh=" + scaledHeight + "]";

    }

    public int getRawLength() {

        return rawLength;

    }

    public int[] getIntData() {

        if (this.intIconData == null) {

            if (this.longIconData != null) {

                this.intIconData = longArrayToIntArray(longIconData);

            } else if (this.image != null) {

                this.intIconData = imageToIntArray(this.image, scaledWidth, scaledHeight);

            }

        }

        return this.intIconData;

    }

    public long[] getLongData() {

        if (this.longIconData == null) {

            if (this.intIconData != null) {

                this.longIconData = intArrayToLongArray(this.intIconData);

            } else if (this.image != null) {

                int[] intIconData = imageToIntArray(this.image, scaledWidth, scaledHeight);

                this.longIconData = intArrayToLongArray(intIconData);

            }

        }

        return this.longIconData;

    }

    public Image getImage() {

        if (this.image == null) {

            if (this.intIconData != null) {

                this.image = intArrayToImage(this.intIconData);

            } else if (this.longIconData != null) {

                int[] intIconData = longArrayToIntArray(this.longIconData);

                this.image = intArrayToImage(intIconData);

            }

        }

        return this.image;

    }

    private static int[] longArrayToIntArray(long[] longData) {

        int[] intData = new int[longData.length];

        for (int i = 0; i < longData.length; i++) {

            // Such a conversion is valid since the

            // original data (see

            // make/sun/xawt/ToBin.java) were ints

            intData[i] = (int)longData[i];

        }

        return intData;

    }

    private static long[] intArrayToLongArray(int[] intData) {

        long[] longData = new long[intData.length];

        for (int i = 0; i < intData.length; i++) {

            longData[i] = intData[i];

        }

        return longData;

    }

    static Image intArrayToImage(int[] raw) {

        ColorModel cm =

            new DirectColorModel(ColorSpace.getInstance(ColorSpace.CS_sRGB), 32,

                                 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000,

                                 false, DataBuffer.TYPE_INT);

        DataBuffer buffer = new DataBufferInt(raw, raw.length-2, 2);

        WritableRaster raster =

            Raster.createPackedRaster(buffer, raw[0], raw[1],

                                      raw[0],

                                      new int[] {0x00ff0000, 0x0000ff00,

                                                 0x000000ff, 0xff000000},

                                      null);

        BufferedImage im = new BufferedImage(cm, raster, false, null);

        return im;

    }

    /*

     * Returns array of integers which holds data for the image.

     * It scales the image if necessary.

     */

    static int[] imageToIntArray(Image image, int width, int height) {

        if (width <= 0 || height <= 0) {

            return null;

        }

        ColorModel cm =

            new DirectColorModel(ColorSpace.getInstance(ColorSpace.CS_sRGB), 32,

                                 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000,

                                 false, DataBuffer.TYPE_INT);

        DataBufferInt buffer = new DataBufferInt(width * height);

        WritableRaster raster =

            Raster.createPackedRaster(buffer, width, height,

                                      width,

                                      new int[] {0x00ff0000, 0x0000ff00,

                                                 0x000000ff, 0xff000000},

                                      null);

        BufferedImage im = new BufferedImage(cm, raster, false, null);

        Graphics g = im.getGraphics();

        g.drawImage(image, 0, 0, width, height, null);

        g.dispose();

        int[] data = buffer.getData();

        int[] raw = new int[width * height + 2];

        raw[0] = width;

        raw[1] = height;

        System.arraycopy(data, 0, raw, 2, width * height);

        return raw;

    }

}