pdfshadingpattern.java

一个java操作pdf文件的开发包,很好用的.

/*
 * Copyright 2002 Paulo Soares
 *
 * 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.io.IOException;
/** Implements the shading pattern dictionary.
 *
 * @author Paulo Soares ([e-mail])
 */
public class PdfShadingPattern extends PdfDictionary {

    protected PdfShading shading;
    
    protected PdfWriter writer;
    
    protected float matrix[] = {1, 0, 0, 1, 0, 0};
    
    protected PdfName patternName;

    protected PdfIndirectReference patternReference;

    /** Creates new PdfShadingPattern */
    public PdfShadingPattern(PdfShading shading) {
        writer = shading.getWriter();
        put(PdfName.PATTERNTYPE, new PdfNumber(2));
        this.shading = shading;
    }
        
    PdfName getPatternName() {
        return patternName;
    }

    PdfName getShadingName() {
        return shading.getShadingName();
    }
    
    PdfIndirectReference getPatternReference() {
        if (patternReference == null)
            patternReference = writer.getPdfIndirectReference();
        return patternReference;
    }
    
    PdfIndirectReference getShadingReference() {
        return shading.getShadingReference();
    }
    
    void setName(int number) {
        patternName = new PdfName("P" + number);
    }
    
    void addToBody() throws IOException {
        put(PdfName.SHADING, getShadingReference());
        put(PdfName.MATRIX, new PdfArray(matrix));
        writer.addToBody(this, getPatternReference());
    }
    
    public void setMatrix(float matrix[]) {
        if (matrix.length != 6)
            throw new RuntimeException("The matrix size must be 6.");
        this.matrix = matrix;
    }
    
    public float[] getMatrix() {
        return matrix;
    }
    
    PdfShading getShading() {
        return shading;
    }
    
    ColorDetails getColorDetails() {
        return shading.getColorDetails();
    }

}