From 6025b6016517c6d898d8957d1d7e03ba71431912 Mon Sep 17 00:00:00 2001 From: tknall Date: Fri, 1 Dec 2006 12:20:24 +0000 Subject: Initial import of release 2.2. git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@4 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c --- src/main/java/com/lowagie/text/pdf/PdfShading.java | 261 +++++++++++++++++++++ 1 file changed, 261 insertions(+) create mode 100644 src/main/java/com/lowagie/text/pdf/PdfShading.java (limited to 'src/main/java/com/lowagie/text/pdf/PdfShading.java') diff --git a/src/main/java/com/lowagie/text/pdf/PdfShading.java b/src/main/java/com/lowagie/text/pdf/PdfShading.java new file mode 100644 index 0000000..54e2067 --- /dev/null +++ b/src/main/java/com/lowagie/text/pdf/PdfShading.java @@ -0,0 +1,261 @@ +/* + * 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; + } + +} -- cgit v1.2.3