pdfgraphics2d.java

一个java操作pdf文件的开发包,很好用的.

/*
 * Copyright 2002 by Jim Moore <[e-mail]>.
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (the "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library 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 Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 */

package com.lowagie.text.pdf;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Composite;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.Image;
import java.awt.Paint;
import java.awt.GradientPaint;
import java.awt.Polygon;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.Transparency;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import java.awt.geom.Arc2D;
import java.awt.geom.Area;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.PathIterator;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.ColorModel;
import java.awt.image.ImageObserver;
import java.awt.image.RenderedImage;
import java.awt.image.WritableRaster;
import java.awt.image.renderable.RenderableImage;
import java.awt.RenderingHints.Key;
import java.awt.geom.NoninvertibleTransformException;
import java.awt.geom.Point2D;
import java.text.CharacterIterator;
import java.text.AttributedCharacterIterator;
import java.util.Map;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.ArrayList;

public class PdfGraphics2D extends Graphics2D {
    
    private static final int FILL = 1;
    private static final int STROKE = 2;
    private static final int CLIP = 3;
    
    private static AffineTransform IDENTITY = new AffineTransform();
    
    private Font font;
    private BaseFont baseFont;
    private float fontSize;
    private AffineTransform transform;
    private Paint paint;
    private Color background;
    private float width;
    private float height;
    
    private Area clip;
    
    private RenderingHints rhints = new RenderingHints(null);
    
    private Stroke stroke;
    
    private PdfContentByte cb;
    
    /** Storage for BaseFont objects created. */
    private HashMap baseFonts;
    
    private boolean disposeCalled = false;
    
    private FontMapper fontMapper;
    
    private PdfFontMetrics fontMetrics;
    
    private ArrayList kids;
    
    private boolean kid = false;
    
    private Graphics dg2 = new BufferedImage(2, 2, BufferedImage.TYPE_INT_RGB).getGraphics();
    
    private boolean onlyShapes = false;

    private PdfGraphics2D() {
    }
    
    /**
     * Constructor for PDFGraphics2D.
     *
     */
    PdfGraphics2D(PdfContentByte cb, float width, float height, FontMapper fontMapper) {
        super();
        this.transform = new AffineTransform();
        this.baseFonts = new HashMap();
        this.fontMapper = fontMapper;
        this.kids = new ArrayList();
        if (this.fontMapper == null)
            this.fontMapper = new DefaultFontMapper();
        paint = Color.black;
        background = Color.white;
        setFont(new Font("sanserif", Font.PLAIN, 12));
        stroke = new BasicStroke(1);
        this.cb = cb;
        cb.saveState();
        this.width = width;
        this.height = height;
        clip = new Area(new Rectangle2D.Float(0, 0, width, height));
        clip(clip);
        cb.saveState();
    }
    
    PdfGraphics2D(PdfContentByte cb, float width, float height) {
        super();
        this.onlyShapes = true;
        this.transform = new AffineTransform();
        this.kids = new ArrayList();
        paint = Color.black;
        background = Color.white;
        setFont(new Font("sanserif", Font.PLAIN, 12));
        stroke = new BasicStroke(1);
        this.cb = cb;
        cb.saveState();
        this.width = width;
        this.height = height;
        clip = new Area(new Rectangle2D.Float(0, 0, width, height));
        clip(clip);
        cb.saveState();
    }
    
    /**
     * @see Graphics2D#draw(Shape)
     */
    public void draw(Shape s) {
        followPath(s, STROKE);
    }
    
    /**
     * @see Graphics2D#drawImage(Image, AffineTransform, ImageObserver)
     */
    public boolean drawImage(Image img, AffineTransform xform, ImageObserver obs) {
        return drawImage(img, null, xform, null, obs);
    }
    
    /**
     * @see Graphics2D#drawImage(BufferedImage, BufferedImageOp, int, int)
     */
    public void drawImage(BufferedImage img, BufferedImageOp op, int x, int y) {
        BufferedImage result = op.createCompatibleDestImage(img, img.getColorModel());
        result = op.filter(img, result);
        drawImage(result, x, y, null);
    }
    
    /**
     * @see Graphics2D#drawRenderedImage(RenderedImage, AffineTransform)
     */
    public void drawRenderedImage(RenderedImage img, AffineTransform xform) {
        BufferedImage image = null;
        if (img instanceof BufferedImage) {
            image = (BufferedImage)img;
        } else {
            ColorModel cm = img.getColorModel();
            int width = img.getWidth();
            int height = img.getHeight();
            WritableRaster raster = cm.createCompatibleWritableRaster(width, height);
            boolean isAlphaPremultiplied = cm.isAlphaPremultiplied();
            Hashtable properties = new Hashtable();
            String[] keys = img.getPropertyNames();
            if (keys!=null) {
                for (int i = 0; i < keys.length; i++) {
                    properties.put(keys[i], img.getProperty(keys[i]));
                }
            }
            BufferedImage result = new BufferedImage(cm, raster, isAlphaPremultiplied, properties);
            img.copyData(raster);
        }
        drawImage(image, xform, null);
    }
    
    /**
     * @see Graphics2D#drawRenderableImage(RenderableImage, AffineTransform)
     */
    public void drawRenderableImage(RenderableImage img, AffineTransform xform) {
        drawRenderedImage(img.createDefaultRendering(), xform);
    }
    
    /**
     * @see Graphics#drawString(String, int, int)
     */
    public void drawString(String s, int x, int y) {
        drawString(s, (float)x, (float)y);
    }
    
    /**
     * @see Graphics2D#drawString(String, float, float)
     */
    public void drawString(String s, float x, float y) {
        if (onlyShapes) {
            TextLayout tl = new TextLayout(s, this.font, new FontRenderContext(new AffineTransform(), false, true));
            tl.draw(this, x, y);
        }
        else {
            AffineTransform at = getTransform();
            AffineTransform at2 = getTransform();
            at2.translate(x, y);
            at2.concatenate(font.getTransform());
            setTransform(at2);
            AffineTransform inverse = this.normalizeMatrix();
            AffineTransform flipper = AffineTransform.getScaleInstance(1,-1);
            inverse.concatenate(flipper);
            double[] mx = new double[6];
            inverse.getMatrix(mx);
            cb.beginText();
            cb.setFontAndSize(baseFont, fontSize);
            cb.setTextMatrix((float)mx[0], (float)mx[1], (float)mx[2], (float)mx[3], (float)mx[4], (float)mx[5]);
            cb.showText(s);
            cb.endText();
            setTransform(at);
        }
    }
    /**
     * @see Graphics#drawString(AttributedCharacterIterator, int, int)
     */
    public void drawString(AttributedCharacterIterator iterator, int x, int y) {
        drawString(iterator, (float)x, (float)y);
    }
    
    /**
     * @see Graphics2D#drawString(AttributedCharacterIterator, float, float)
     */
    public void drawString(AttributedCharacterIterator iter, float x, float y) {
        StringBuffer sb = new StringBuffer();
        for(char c = iter.first(); c != AttributedCharacterIterator.DONE; c = iter.next()) {
            sb.append(c);
        }
        drawString(sb.toString(),x,y);
        
    }
    
    /**
     * @see Graphics2D#drawGlyphVector(GlyphVector, float, float)
     */
    public void drawGlyphVector(GlyphVector g, float x, float y) {
        Shape s = g.getOutline(x, y);
        fill(s);
    }
    
    /**
     * @see Graphics2D#fill(Shape)
     */
    public void fill(Shape s) {
        followPath(s, FILL);
    }
    
    /**
     * @see Graphics2D#hit(Rectangle, Shape, boolean)
     */
    public boolean hit(Rectangle rect, Shape s, boolean onStroke) {
        if (onStroke) {
            s = stroke.createStrokedShape(s);
        }
        s = transform.createTransformedShape(s);
        Area area = new Area(s);
        if (clip != null)
            area.intersect(clip);
        return area.intersects(rect.x, rect.y, rect.width, rect.height);
    }
    
    /**
     * @see Graphics2D#getDeviceConfiguration()
     */
    public GraphicsConfiguration getDeviceConfiguration() {
        throw new UnsupportedOperationException();
    }
    
    /**
     * @see Graphics2D#setComposite(Composite)
     */
    public void setComposite(Composite comp) {
        
    }
    
    /**
     * @see Graphics2D#setPaint(Paint)
     */
    public void setPaint(Paint paint) {
        setPaint(paint, false, 0, 0);
    }
    
    /**
     * @see Graphics2D#setStroke(Stroke)
     */
    public void setStroke(Stroke s) {
        this.stroke = s;
    }
    
    /**
     * @see Graphics2D#setRenderingHint(Key, Object)
     */
    public void setRenderingHint(Key arg0, Object arg1) {
        rhints.put(arg0, arg1);
    }
    
    /**
     * @see Graphics2D#getRenderingHint(Key)
     */
    public Object getRenderingHint(Key arg0) {
        return rhints.get(arg0);
    }
    
    /**
     * @see Graphics2D#setRenderingHints(Map)
     */
    public void setRenderingHints(Map hints) {
        rhints.clear();
        rhints.putAll(hints);
    }
    
    /**
     * @see Graphics2D#addRenderingHints(Map)
     */
    public void addRenderingHints(Map hints) {
        rhints.putAll(hints);
    }
    
    /**
     * @see Graphics2D#getRenderingHints()
     */
    public RenderingHints getRenderingHints() {
        return rhints;
    }
    
    /**
     * @see Graphics#translate(int, int)
     */
    public void translate(int x, int y) {
        translate((double)x, (double)y);
    }
    
    /**
     * @see Graphics2D#translate(double, double)
     */
    public void translate(double tx, double ty) {
        transform.translate(tx,ty);
    }
    
    /**
     * @see Graphics2D#rotate(double)
     */
    public void rotate(double theta) {
        transform.rotate(theta);
    }
    
    /**
     * @see Graphics2D#rotate(double, double, double)
     */
    public void rotate(double theta, double x, double y) {