Java tutorial
/* * * This file is part of the iText (R) project. Copyright (c) 1998-2019 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 com.itextpdf.text.pdf.internal.PdfIsoKeys; import java.io.IOException; import java.io.OutputStream; /** The graphic state dictionary. * * @author Paulo Soares */ public class PdfGState extends PdfDictionary { /** A possible blend mode */ public static final PdfName BM_NORMAL = new PdfName("Normal"); /** A possible blend mode */ public static final PdfName BM_COMPATIBLE = new PdfName("Compatible"); /** A possible blend mode */ public static final PdfName BM_MULTIPLY = new PdfName("Multiply"); /** A possible blend mode */ public static final PdfName BM_SCREEN = new PdfName("Screen"); /** A possible blend mode */ public static final PdfName BM_OVERLAY = new PdfName("Overlay"); /** A possible blend mode */ public static final PdfName BM_DARKEN = new PdfName("Darken"); /** A possible blend mode */ public static final PdfName BM_LIGHTEN = new PdfName("Lighten"); /** A possible blend mode */ public static final PdfName BM_COLORDODGE = new PdfName("ColorDodge"); /** A possible blend mode */ public static final PdfName BM_COLORBURN = new PdfName("ColorBurn"); /** A possible blend mode */ public static final PdfName BM_HARDLIGHT = new PdfName("HardLight"); /** A possible blend mode */ public static final PdfName BM_SOFTLIGHT = new PdfName("SoftLight"); /** A possible blend mode */ public static final PdfName BM_DIFFERENCE = new PdfName("Difference"); /** A possible blend mode */ public static final PdfName BM_EXCLUSION = new PdfName("Exclusion"); /** * Sets the flag whether to apply overprint for stroking. * @param op */ public void setOverPrintStroking(boolean op) { put(PdfName.OP, op ? PdfBoolean.PDFTRUE : PdfBoolean.PDFFALSE); } /** * Sets the flag whether to apply overprint for non stroking painting operations. * @param op */ public void setOverPrintNonStroking(boolean op) { put(PdfName.op, op ? PdfBoolean.PDFTRUE : PdfBoolean.PDFFALSE); } /** * Sets the flag whether to toggle knockout behavior for overprinted objects. * @param opm - accepts 0 or 1 */ public void setOverPrintMode(int opm) { put(PdfName.OPM, new PdfNumber(opm == 0 ? 0 : 1)); } /** * Sets the current stroking alpha constant, specifying the constant shape or * constant opacity value to be used for stroking operations in the transparent * imaging model. * @param ca */ public void setStrokeOpacity(float ca) { put(PdfName.CA, new PdfNumber(ca)); } /** * Sets the current stroking alpha constant, specifying the constant shape or * constant opacity value to be used for nonstroking operations in the transparent * imaging model. * @param ca */ public void setFillOpacity(float ca) { put(PdfName.ca, new PdfNumber(ca)); } /** * The alpha source flag specifying whether the current soft mask * and alpha constant are to be interpreted as shape values (true) * or opacity values (false). * @param ais */ public void setAlphaIsShape(boolean ais) { put(PdfName.AIS, ais ? PdfBoolean.PDFTRUE : PdfBoolean.PDFFALSE); } /** * Determines the behavior of overlapping glyphs within a text object * in the transparent imaging model. * @param tk */ public void setTextKnockout(boolean tk) { put(PdfName.TK, tk ? PdfBoolean.PDFTRUE : PdfBoolean.PDFFALSE); } /** * The current blend mode to be used in the transparent imaging model. * @param bm */ public void setBlendMode(PdfName bm) { put(PdfName.BM, bm); } /** * Set the rendering intent, possible values are: PdfName.ABSOLUTECOLORIMETRIC, * PdfName.RELATIVECOLORIMETRIC, PdfName.SATURATION, PdfName.PERCEPTUAL. * @param ri * @since 5.0.2 */ public void setRenderingIntent(PdfName ri) { put(PdfName.RI, ri); } @Override public void toPdf(final PdfWriter writer, final OutputStream os) throws IOException { PdfWriter.checkPdfIsoConformance(writer, PdfIsoKeys.PDFISOKEY_GSTATE, this); super.toPdf(writer, os); } }