linkraster.java

openmap java写的开源数字地图程序. 用applet实现,可以像google map 那样放大缩小地图.

// **********************************************************************
// 
// <copyright>
// 
//  BBN Technologies
//  10 Moulton Street
//  Cambridge, MA 02138
//  [phone]
// 
//  Copyright (C) BBNT Solutions LLC. All rights reserved.
// 
// </copyright>
// **********************************************************************
// 
// $Source: /cvs/distapps/openmap/src/openmap/com/bbn/openmap/layer/link/LinkRaster.java,v $
// $RCSfile: LinkRaster.java,v $
// $Revision: 1.3.2.1 $
// $Date: 2004/10/14 18:27:08 $
// $Author: dietrick $
// 
// **********************************************************************

package com.bbn.openmap.layer.link;

import com.bbn.openmap.omGraphics.OMRaster;
import com.bbn.openmap.proj.ProjMath;
import com.bbn.openmap.util.ColorFactory;
import com.bbn.openmap.util.Debug;
import com.bbn.openmap.util.PropUtils;

import java.awt.Color;
import java.awt.Image;
import java.awt.image.PixelGrabber;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import javax.swing.ImageIcon;

/**
 * Read and write a Link protocol versions of a raster.
 */
public class LinkRaster implements LinkGraphicConstants,
        LinkPropertiesConstants {

    /**
     * Writes an image, Lat/Lon placement with a direct colormodel.
     * 
     * @param lt latitude of the top of the image.
     * @param ln longitude of the left side of the image.
     * @param w width of the image, in pixels.
     * @param h height of the image, in pixels.
     * @param pix color values for the pixels.
     * @param properties description of drawing attributes. Not used,
     *        but included to be consistant with the protocol graphics
     *        format.
     * @param dos DataOutputStream
     * @throws IOException
     */
    public static void write(float lt, float ln, int w, int h, int[] pix,
                             LinkProperties properties, DataOutputStream dos)
            throws IOException {

        dos.write(Link.RASTER_HEADER.getBytes());
        dos.writeInt(GRAPHICTYPE_RASTER);
        dos.writeInt(RENDERTYPE_LATLON);
        dos.writeInt(COLORMODEL_DIRECT);
        dos.writeFloat(lt);
        dos.writeFloat(ln);
        dos.writeInt(w);
        dos.writeInt(h);
        dos.writeInt(pix.length);

        for (int i = 0; i < pix.length; i++) {
            dos.writeInt(pix[i]);
        }
        properties.write(dos);
    }

    /**
     * Write an image, XY placement with a direct colormodel.
     * 
     * @param x1 window location of the left side of the image.
     * @param y1 window location of the top of the image.
     * @param w width of the image, in pixels.
     * @param h height of the image, in pixels.
     * @param pix color values for the pixels.
     * @param properties description of drawing attributes. Not used,
     *        but included to be consistant with the protocol graphics
     *        format.
     * @param dos DataOutputStream
     * @throws IOException
     */
    public static void write(int x1, int y1, int w, int h, int[] pix,
                             LinkProperties properties, DataOutputStream dos)
            throws IOException {

        dos.write(Link.RASTER_HEADER.getBytes());
        dos.writeInt(GRAPHICTYPE_RASTER);
        dos.writeInt(RENDERTYPE_XY);
        dos.writeInt(COLORMODEL_DIRECT);
        dos.writeInt(x1);
        dos.writeInt(y1);
        dos.writeInt(w);
        dos.writeInt(h);
        dos.writeInt(pix.length);

        for (int i = 0; i < pix.length; i++) {
            dos.writeInt(pix[i]);
        }
        properties.write(dos);
    }

    /**
     * Write an image, Lat/lon placement with XY offset with a direct
     * colormodel.
     * 
     * @param lt latitude of the top of the image, before the offset.
     * @param ln longitude of the left side of the image, before the
     *        offset.
     * @param offset_x1 number of pixels to move image to the right.
     * @param offset_y1 number of pixels to move image down.
     * @param w width of the image, in pixels.
     * @param h height of the image, in pixels.
     * @param pix color values for the pixels.
     * @param properties description of drawing attributes. Not used,
     *        but included to be consistant with the protocol graphics
     *        format.
     * @param dos DataOutputStream
     * @throws IOException
     */
    public static void write(float lt, float ln, int offset_x1, int offset_y1,
                             int w, int h, int[] pix,
                             LinkProperties properties, DataOutputStream dos)
            throws IOException {

        dos.write(Link.RASTER_HEADER.getBytes());
        dos.writeInt(GRAPHICTYPE_RASTER);
        dos.writeInt(RENDERTYPE_OFFSET);
        dos.writeInt(COLORMODEL_DIRECT);
        dos.writeFloat(lt);
        dos.writeFloat(ln);
        dos.writeInt(offset_x1);
        dos.writeInt(offset_y1);
        dos.writeInt(w);
        dos.writeInt(h);
        dos.writeInt(pix.length);

        for (int i = 0; i < pix.length; i++) {
            dos.writeInt(pix[i]);
        }
        properties.write(dos);
    }

    /**
     * Write an image, Lat/Lon placement with an ImageIcon.
     * 
     * @param lt latitude of the top of the image.
     * @param ln longitude of the left side of the image.
     * @param image java.awt.Image to use for image.
     * @param image_width width of image in pixels.
     * @param image_height height of image in pixels.
     * @param properties description of drawing attributes. Not used,
     *        but included to be consistant with the protocol graphics
     *        format.
     * @param dos DataOutputStream
     * @throws IOException
     */
    public static void write(float lt, float ln, Image image, int image_width,
                             int image_height, LinkProperties properties,
                             DataOutputStream dos) throws IOException,
            InterruptedException {

        int[] pixels = new int[image_width * image_height];

        PixelGrabber pixelgrabber = new PixelGrabber(image, 0, 0, image_width, image_height, pixels, 0, image_width);
        pixelgrabber.grabPixels();

        LinkRaster.write(lt,
                ln,
                image_width,
                image_height,
                pixels,
                properties,
                dos);
    }

    /**
     * Write an image, X/Y placement with an ImageIcon.
     * 
     * @param x1 window location of the left side of the image.
     * @param y1 window location of the top of the image.
     * @param image java.awt.Image to use for image.
     * @param image_width width of image in pixels.
     * @param image_height height of image in pixels.
     * @param properties description of drawing attributes. Not used,
     *        but included to be consistant with the protocol graphics
     *        format.
     * @param dos DataOutputStream
     * @throws IOException
     */
    public static void write(int x1, int y1, Image image, int image_width,
                             int image_height, LinkProperties properties,
                             DataOutputStream dos) throws IOException,
            InterruptedException {
        int[] pixels = new int[image_width * image_height];

        PixelGrabber pixelgrabber = new PixelGrabber(image, 0, 0, image_width, image_height, pixels, 0, image_width);
        pixelgrabber.grabPixels();

        LinkRaster.write(x1,
                y1,
                image_width,
                image_height,
                pixels,
                properties,
                dos);
    }

    /**
     * Write an image, Lat/Lon with X/Y placement with an ImageIcon.
     * 
     * @param lt latitude of the top of the image, before the offset.
     * @param ln longitude of the left side of the image, before the
     *        offset.
     * @param offset_x1 number of pixels to move image to the right.
     * @param offset_y1 number of pixels to move image down.
     * @param image java.awt.Image to use for image.
     * @param image_width width of image in pixels.
     * @param image_height height of image in pixels.
     * @param properties description of drawing attributes. Not used,
     *        but included to be consistant with the protocol graphics
     *        format.
     * @param dos DataOutputStream
     * @throws IOException
     */
    public static void write(float lt, float ln, int offset_x1, int offset_y1,
                             Image image, int image_width, int image_height,
                             LinkProperties properties, DataOutputStream dos)
            throws IOException, InterruptedException {
        int[] pixels = new int[image_width * image_height];

        PixelGrabber pixelgrabber = new PixelGrabber(image, 0, 0, image_width, image_height, pixels, 0, image_width);
        pixelgrabber.grabPixels();

        LinkRaster.write(lt,
                ln,
                offset_x1,
                offset_y1,
                image_width,
                image_height,
                pixels,
                properties,
                dos);
    }

    /**
     * Write an image, Lat/Lon placement with an ImageIcon.
     * 
     * @param lt latitude of the top of the image.
     * @param ln longitude of the left side of the image.
     * @param ii ImageIcon to use for image.
     * @param properties description of drawing attributes. Not used,
     *        but included to be consistant with the protocol graphics
     *        format.
     * @param dos DataOutputStream
     * @throws IOException
     */
    public static void write(float lt, float ln, ImageIcon ii,
                             LinkProperties properties, DataOutputStream dos)
            throws IOException, InterruptedException {

        int image_width, image_height;
        Image image;

        image_width = ii.getIconWidth();
        image_height = ii.getIconHeight();
        image = ii.getImage();
        LinkRaster.write(lt,
                ln,
                image,
                image_width,
                image_height,
                properties,
                dos);
    }

    /**
     * Write an image, X/Y placement with an ImageIcon.
     * 
     * @param x1 window location of the left side of the image.
     * @param y1 window location of the top of the image.
     * @param ii ImageIcon to use for image.
     * @param properties description of drawing attributes. Not used,
     *        but included to be consistant with the protocol graphics
     *        format.
     * @param dos DataOutputStream
     * @throws IOException
     */
    public static void write(int x1, int y1, ImageIcon ii,
                             LinkProperties properties, DataOutputStream dos)
            throws IOException, InterruptedException {

        int image_width, image_height;
        Image image;

        image_width = ii.getIconWidth();
        image_height = ii.getIconHeight();
        image = ii.getImage();
        LinkRaster.write(x1,
                y1,
                image,
                image_width,
                image_height,
                properties,
                dos);
    }

    /**
     * Write an image, Lat/Lon with X/Y placement with an ImageIcon.
     * 
     * @param lt latitude of the top of the image, before the offset.
     * @param ln longitude of the left side of the image, before the
     *        offset.
     * @param offset_x1 number of pixels to move image to the right.
     * @param offset_y1 number of pixels to move image down.
     * @param ii ImageIcon to use for image.
     * @param properties description of drawing attributes. Not used,
     *        but included to be consistant with the protocol graphics
     *        format.
     * @param dos DataOutputStream
     * @throws IOException
     */
    public static void write(float lt, float ln, int offset_x1, int offset_y1,
                             ImageIcon ii, LinkProperties properties,
                             DataOutputStream dos) throws IOException,
            InterruptedException {

        int image_width, image_height;
        Image image;

        image_width = ii.getIconWidth();
        image_height = ii.getIconHeight();
        image = ii.getImage();
        LinkRaster.write(lt,
                ln,
                offset_x1,
                offset_y1,
                image,
                image_width,
                image_height,
                properties,
                dos);

    }

    ////////////////////////////////////// IMAGEICON LOADED FROM AN
    // URL

    /**
     * Write an image, Lat/Lon placement with an ImageIcon.
     * 
     * @param lt latitude of the top of the image.
     * @param ln longitude of the left side of the image.
     * @param url URL to download the image from.
     * @param properties description of drawing attributes. Not used,
     *        but included to be consistant with the protocol graphics
     *        format.
     * @param dos DataOutputStream
     * @throws IOException
     */
    public static void write(float lt, float ln, String url,
                             LinkProperties properties, DataOutputStream dos)
            throws IOException {

        dos.write(Link.RASTER_HEADER.getBytes());
        dos.writeInt(GRAPHICTYPE_RASTER);
        dos.writeInt(RENDERTYPE_LATLON);
        dos.writeInt(COLORMODEL_URL);
        dos.writeFloat(lt);
        dos.writeFloat(ln);
        properties.setProperty(LPC_LINKRASTERIMAGEURL, url);