ppsvgbitmap.java

一个用Java写的

/******************************************************************
 * Copyright (C) 2002-2006 Andrew Girow. All rights reserved.     *
 * ---------------------------------------------------------------*
 * This software is published under the terms of the TinyLine     *
 * License, a copy of which has been included with this           *
 * distribution in the TINYLINE_LICENSE.TXT file.                 *
 *                                                                *
 * For more information on the TinyLine,                          *
 * please see <http://www.tinyline.com/>.                         *
 *****************************************************************/
package com.tinyline.app;

import java.awt.*;
import java.awt.image.*;
import java.net.URL;
import java.util.Hashtable;

import com.tinyline.tiny2d.TinyBitmap;


/** The <tt>PPSVGBitmap</tt> represents the TinyBitmap for the J2ME
 *  Personal Profile. The process of creating a raster image is
 *  different for different platforms and JVMs.
 *  That is why the derived class from the TinyBitmap class is needed.
 *
 * @author (C) Andrew Girow
 * @version 1.9
 * <p>
 */

public class PPSVGBitmap extends TinyBitmap implements ImageObserver
{
    /**
     * Create a new <tt>PPSVGBitmap</tt> which gets pixel data
     * from the base URL and the path.
     *
     * @param   baseUrl   the base URL context
     * @param   imageRef  the String representation of the URL
     * to use in fetching the pixel data.
     */
    public PPSVGBitmap(MediaTracker tracker, URL imgUrl)
    {
       Image image = null;
       try
       {
           image = Toolkit.getDefaultToolkit().getImage(imgUrl);
           tracker.addImage (image, 0);
           tracker.waitForID(0);
           width = image.getWidth(this);
 //       System.out.println("PPSVGBitmap width " + width);
           height = image.getHeight(this);
 //       System.out.println("PPSVGBitmap height " + height);
           PixelGrabber pg = new PixelGrabber(image, 0, 0, width, height, true);
           try
           {
             pg.grabPixels();
             pixels32 = (int [])pg.getPixels();
           }
           catch (InterruptedException e)
           {
             e.printStackTrace();  // Debug
           }
       }
       catch (Exception e)
       {
           e.printStackTrace();  // Debug
       }
    }

    /**
     * Create a new <tt>PPSVGBitmap</tt> which gets pixel data
     * from the given array of bytes.
     * @param     imageData   an array of bytes, representing
     *                         image data in a supported image format.
     * @param     imageOffset  the offset of the beginning
     *                         of the data in the array.
     * @param     imageLength  the length of the data in the array.
     */
    public PPSVGBitmap(MediaTracker tracker, byte[] imageData, int imageOffset, int imageLength)
    {
       Image image = null;
       try
       {
           image = Toolkit.getDefaultToolkit().createImage(
           imageData, imageOffset, imageLength);
           tracker.addImage (image, 0);
           tracker.waitForID(0);
           width = image.getWidth(this);
 //       System.out.println("PPSVGBitmap width " + width);
           height = image.getHeight(this);
 //       System.out.println("PPSVGBitmap height " + height);
           PixelGrabber pg = new PixelGrabber(image, 0, 0, width, height, true);
           try
           {
             pg.grabPixels();
             pixels32 = (int [])pg.getPixels();
           }
           catch (InterruptedException e)
           {
             e.printStackTrace();  // Debug
           }
       }
       catch (Exception e)
       {
           e.printStackTrace();  // Debug
       }
    }

    public boolean imageUpdate(Image img, int infoflags, int x, int y,
           int width, int height)
    {
       return true;
    }

}