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-/*
- * 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.awt.Color;
-import java.io.IOException;
-/** Implements the shading dictionary (or stream).
- *
- * @author Paulo Soares (psoares@consiste.pt)
- */
-public class PdfShading {
-
- protected PdfDictionary shading;
-
- protected PdfWriter writer;
-
- protected int shadingType;
-
- protected ColorDetails colorDetails;
-
- protected PdfName shadingName;
-
- protected PdfIndirectReference shadingReference;
-
- private Color 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(Color 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_PATTERN:
- case ExtendedColor.TYPE_SHADING: {
- throwColorSpaceError();
- }
- default:
- colorSpace = PdfName.DEVICERGB;
- break;
- }
- shading.put(PdfName.COLORSPACE, colorSpace);
- }
-
- Color getColorSpace() {
- return cspace;
- }
-
- public static void throwColorSpaceError() {
- throw new IllegalArgumentException("A tiling or shading pattern cannot be used as a color space in a shading pattern");
- }
-
- public static void checkCompatibleColors(Color c1, Color c2) {
- int type1 = ExtendedColor.getType(c1);
- int type2 = ExtendedColor.getType(c2);
- if (type1 != type2)
- throw new IllegalArgumentException("Both colors must be of the same type.");
- if (type1 == ExtendedColor.TYPE_SEPARATION && ((SpotColor)c1).getPdfSpotColor() != ((SpotColor)c2).getPdfSpotColor())
- throw new IllegalArgumentException("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(Color 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_RGB: {
- return new float[]{color.getRed() / 255f, color.getGreen() / 255f, color.getBlue() / 255f};
- }
- }
- throwColorSpaceError();
- return null;
- }
-
- public static PdfShading type1(PdfWriter writer, Color 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, Color 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, Color 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, Color startColor, Color 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, Color startColor, Color 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, Color startColor, Color 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, Color startColor, Color 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);
- }
-
- 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("BBox must be a 4 element array.");
- this.bBox = bBox;
- }
-
- public boolean isAntiAlias() {
- return antiAlias;
- }
-
- public void setAntiAlias(boolean antiAlias) {
- this.antiAlias = antiAlias;
- }
-
-}