diff options
Diffstat (limited to 'src/main/java/com/lowagie/text/pdf/PdfShading.java')
| -rw-r--r-- | src/main/java/com/lowagie/text/pdf/PdfShading.java | 261 |
1 files changed, 261 insertions, 0 deletions
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;
+ }
+
+}
|