itextpdf.jar is a component in iText 5 Java library to provide core functionalities. iText Java library allows you to generate and manage PDF documents.

The Source Code files are provided at iText GitHub site.

You can compile it to generate your JAR file, using pom.xml as the build configuration file.

The source code of itextpdf-5.5.14.jar is provided below:

⏎ com/itextpdf/text/pdf/PdfShading.java

/*
 *
 * This file is part of the iText (R) project.
    Copyright (c) 1998-2020 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.text.pdf;

import java.io.IOException;
import com.itextpdf.text.error_messages.MessageLocalization;
import com.itextpdf.text.BaseColor;
/** Implements the shading dictionary (or stream).
 *
 * @author Paulo Soares
 */
public class PdfShading {

    protected PdfDictionary shading;
    
    protected PdfWriter writer;
    
    protected int shadingType;
    
    protected ColorDetails colorDetails;
    
    protected PdfName shadingName;
    
    protected PdfIndirectReference shadingReference;
    
    private BaseColor cspace;
    
    /** Holds value of property bBox. */
    protected float[] bBox;
    
    /** Holds value of property antiAlias. */
    protected boolean antiAlias = false;
    
    /** Creates new PdfShading */
    protected PdfShading(PdfWriter writer) {
        this.writer = writer;
    }
    
    protected void setColorSpace(BaseColor color) {
        cspace = color;
        int type = ExtendedColor.getType(color);
        PdfObject colorSpace = null;
        switch (type) {
            case ExtendedColor.TYPE_GRAY: {
                colorSpace = PdfName.DEVICEGRAY;
                break;
            }
            case ExtendedColor.TYPE_CMYK: {
                colorSpace = PdfName.DEVICECMYK;
                break;
            }
            case ExtendedColor.TYPE_SEPARATION: {
                SpotColor spot = (SpotColor)color;
                colorDetails = writer.addSimple(spot.getPdfSpotColor());
                colorSpace = colorDetails.getIndirectReference();
                break;
            }
            case ExtendedColor.TYPE_DEVICEN: {
                DeviceNColor deviceNColor = (DeviceNColor)color;
                colorDetails = writer.addSimple(deviceNColor.getPdfDeviceNColor());
                colorSpace = colorDetails.getIndirectReference();
                break;
            }
            case ExtendedColor.TYPE_PATTERN:
            case ExtendedColor.TYPE_SHADING: {
                throwColorSpaceError();
            }
            default:
                colorSpace = PdfName.DEVICERGB;
                break;
        }
        shading.put(PdfName.COLORSPACE, colorSpace);
    }
    
    public BaseColor getColorSpace() {
        return cspace;
    }
    
    public static void throwColorSpaceError() {
        throw new IllegalArgumentException(MessageLocalization.getComposedMessage("a.tiling.or.shading.pattern.cannot.be.used.as.a.color.space.in.a.shading.pattern"));
    }
    
    public static void checkCompatibleColors(BaseColor c1, BaseColor c2) {
        int type1 = ExtendedColor.getType(c1);
        int type2 = ExtendedColor.getType(c2);
        if (type1 != type2)
            throw new IllegalArgumentException(MessageLocalization.getComposedMessage("both.colors.must.be.of.the.same.type"));
        if (type1 == ExtendedColor.TYPE_SEPARATION && ((SpotColor)c1).getPdfSpotColor() != ((SpotColor)c2).getPdfSpotColor())
            throw new IllegalArgumentException(MessageLocalization.getComposedMessage("the.spot.color.must.be.the.same.only.the.tint.can.vary"));
        if (type1 == ExtendedColor.TYPE_PATTERN || type1 == ExtendedColor.TYPE_SHADING)
            throwColorSpaceError();
    }
    
    public static float[] getColorArray(BaseColor color) {
        int type = ExtendedColor.getType(color);
        switch (type) {
            case ExtendedColor.TYPE_GRAY: {
                return new float[]{((GrayColor)color).getGray()};
            }
            case ExtendedColor.TYPE_CMYK: {
                CMYKColor cmyk = (CMYKColor)color;
                return new float[]{cmyk.getCyan(), cmyk.getMagenta(), cmyk.getYellow(), cmyk.getBlack()};
            }
            case ExtendedColor.TYPE_SEPARATION: {
                return new float[]{((SpotColor)color).getTint()};
            }
            case ExtendedColor.TYPE_DEVICEN: {
                return ((DeviceNColor)color).getTints();
            }
            case ExtendedColor.TYPE_RGB: {
                return new float[]{color.getRed() / 255f, color.getGreen() / 255f, color.getBlue() / 255f};
            }
        }
        throwColorSpaceError();
        return null;
    }

    public static PdfShading type1(PdfWriter writer, BaseColor colorSpace, float domain[], float tMatrix[], PdfFunction function) {
        PdfShading sp = new PdfShading(writer);
        sp.shading = new PdfDictionary();
        sp.shadingType = 1;
        sp.shading.put(PdfName.SHADINGTYPE, new PdfNumber(sp.shadingType));
        sp.setColorSpace(colorSpace);
        if (domain != null)
            sp.shading.put(PdfName.DOMAIN, new PdfArray(domain));
        if (tMatrix != null)
            sp.shading.put(PdfName.MATRIX, new PdfArray(tMatrix));
        sp.shading.put(PdfName.FUNCTION, function.getReference());
        return sp;
    }
    
    public static PdfShading type2(PdfWriter writer, BaseColor colorSpace, float coords[], float domain[], PdfFunction function, boolean extend[]) {
        PdfShading sp = new PdfShading(writer);
        sp.shading = new PdfDictionary();
        sp.shadingType = 2;
        sp.shading.put(PdfName.SHADINGTYPE, new PdfNumber(sp.shadingType));
        sp.setColorSpace(colorSpace);
        sp.shading.put(PdfName.COORDS, new PdfArray(coords));
        if (domain != null)
            sp.shading.put(PdfName.DOMAIN, new PdfArray(domain));
        sp.shading.put(PdfName.FUNCTION, function.getReference());
        if (extend != null && (extend[0] || extend[1])) {
            PdfArray array = new PdfArray(extend[0] ? PdfBoolean.PDFTRUE : PdfBoolean.PDFFALSE);
            array.add(extend[1] ? PdfBoolean.PDFTRUE : PdfBoolean.PDFFALSE);
            sp.shading.put(PdfName.EXTEND, array);
        }
        return sp;
    }

    public static PdfShading type3(PdfWriter writer, BaseColor colorSpace, float coords[], float domain[], PdfFunction function, boolean extend[]) {
        PdfShading sp = type2(writer, colorSpace, coords, domain, function, extend);
        sp.shadingType = 3;
        sp.shading.put(PdfName.SHADINGTYPE, new PdfNumber(sp.shadingType));
        return sp;
    }
    
    public static PdfShading simpleAxial(PdfWriter writer, float x0, float y0, float x1, float y1, BaseColor startColor, BaseColor endColor, boolean extendStart, boolean extendEnd) {
        checkCompatibleColors(startColor, endColor);
        PdfFunction function = PdfFunction.type2(writer, new float[]{0, 1}, null, getColorArray(startColor),
            getColorArray(endColor), 1);
        return type2(writer, startColor, new float[]{x0, y0, x1, y1}, null, function, new boolean[]{extendStart, extendEnd});
    }
    
    public static PdfShading simpleAxial(PdfWriter writer, float x0, float y0, float x1, float y1, BaseColor startColor, BaseColor endColor) {
        return simpleAxial(writer, x0, y0, x1, y1, startColor, endColor, true, true);
    }
    
    public static PdfShading simpleRadial(PdfWriter writer, float x0, float y0, float r0, float x1, float y1, float r1, BaseColor startColor, BaseColor endColor, boolean extendStart, boolean extendEnd) {
        checkCompatibleColors(startColor, endColor);
        PdfFunction function = PdfFunction.type2(writer, new float[]{0, 1}, null, getColorArray(startColor),
            getColorArray(endColor), 1);
        return type3(writer, startColor, new float[]{x0, y0, r0, x1, y1, r1}, null, function, new boolean[]{extendStart, extendEnd});
    }

    public static PdfShading simpleRadial(PdfWriter writer, float x0, float y0, float r0, float x1, float y1, float r1, BaseColor startColor, BaseColor endColor) {
        return simpleRadial(writer, x0, y0, r0, x1, y1, r1, startColor, endColor, true, true);
    }

    PdfName getShadingName() {
        return shadingName;
    }
    
    PdfIndirectReference getShadingReference() {
        if (shadingReference == null)
            shadingReference = writer.getPdfIndirectReference();
        return shadingReference;
    }
    
    void setName(int number) {
        shadingName = new PdfName("Sh" + number);
    }
    
    public void addToBody() throws IOException {
        if (bBox != null)
            shading.put(PdfName.BBOX, new PdfArray(bBox));
        if (antiAlias)
            shading.put(PdfName.ANTIALIAS, PdfBoolean.PDFTRUE);
        writer.addToBody(shading, getShadingReference());
    }
    
    PdfWriter getWriter() {
        return writer;
    }
    
    ColorDetails getColorDetails() {
        return colorDetails;
    }
    
    public float[] getBBox() {
        return bBox;
    }
    
    public void setBBox(float[] bBox) {
        if (bBox.length != 4)
            throw new IllegalArgumentException(MessageLocalization.getComposedMessage("bbox.must.be.a.4.element.array"));
        this.bBox = bBox;
    }
    
    public boolean isAntiAlias() {
        return antiAlias;
    }
    
    public void setAntiAlias(boolean antiAlias) {
        this.antiAlias = antiAlias;
    }
    
}

⏎ com/itextpdf/text/pdf/PdfShading.java

Or download all of them as a single archive file:

File name: itextpdf-5.5.14-fyi.zip
File size: 2163839 bytes
Release date: 2009-10-09
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⇒ iText-2.1.6.jar - iText, a JAVA-PDF library

⇐ iText layout.jar Source Code

⇑ Download and Install iText Java Library

⇑⇑ iText for PDF Generation