Java example source code file (IconInfo.java)

This example Java source code file (IconInfo.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

awt, bufferedimage, color, colormodel, databufferint, graphics, iconinfo, image, imagerepresentation, string, toolkitimage, util, writableraster

The IconInfo.java Java example source code

/*
 * Copyright (c) 2006, 2013, 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;
        this.rawLength = width * height + 2;
    }

    /*
     * It sets size of scaled icon.
     */
    public void setScaledSize(int width, int height) {
        this.scaledWidth = width;
        this.scaledHeight = height;
        this.rawLength = width * height + 2;
    }

    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] = (int)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;
    }

}