001: /*
002: * $Id: ImgWMF.java 2752 2007-05-15 14:58:33Z blowagie $
003: * $Name$
004: *
005: * Copyright 1999, 2000, 2001, 2002 by Paulo Soares.
006: *
007: * The contents of this file are subject to the Mozilla Public License Version 1.1
008: * (the "License"); you may not use this file except in compliance with the License.
009: * You may obtain a copy of the License at http://www.mozilla.org/MPL/
010: *
011: * Software distributed under the License is distributed on an "AS IS" basis,
012: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
013: * for the specific language governing rights and limitations under the License.
014: *
015: * The Original Code is 'iText, a free JAVA-PDF library'.
016: *
017: * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
018: * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
019: * All Rights Reserved.
020: * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
021: * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
022: *
023: * Contributor(s): all the names of the contributors are added in the source code
024: * where applicable.
025: *
026: * Alternatively, the contents of this file may be used under the terms of the
027: * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
028: * provisions of LGPL are applicable instead of those above. If you wish to
029: * allow use of your version of this file only under the terms of the LGPL
030: * License and not to allow others to use your version of this file under
031: * the MPL, indicate your decision by deleting the provisions above and
032: * replace them with the notice and other provisions required by the LGPL.
033: * If you do not delete the provisions above, a recipient may use your version
034: * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
035: *
036: * This library is free software; you can redistribute it and/or modify it
037: * under the terms of the MPL as stated above or under the terms of the GNU
038: * Library General Public License as published by the Free Software Foundation;
039: * either version 2 of the License, or any later version.
040: *
041: * This library is distributed in the hope that it will be useful, but WITHOUT
042: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
043: * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
044: * details.
045: *
046: * If you didn't download this code from the following link, you should check if
047: * you aren't using an obsolete version:
048: * http://www.lowagie.com/iText/
049: */
050:
051: package com.lowagie.text;
052:
053: import java.io.IOException;
054: import java.io.InputStream;
055: import java.net.MalformedURLException;
056: import java.net.URL;
057:
058: import com.lowagie.text.pdf.PdfTemplate;
059: import com.lowagie.text.pdf.codec.wmf.InputMeta;
060: import com.lowagie.text.pdf.codec.wmf.MetaDo;
061:
062: /**
063: * An <CODE>ImgWMF</CODE> is the representation of a windows metafile
064: * that has to be inserted into the document
065: *
066: * @see Element
067: * @see Image
068: */
069:
070: public class ImgWMF extends Image {
071:
072: // Constructors
073:
074: ImgWMF(Image image) {
075: super (image);
076: }
077:
078: /**
079: * Constructs an <CODE>ImgWMF</CODE>-object, using an <VAR>url</VAR>.
080: *
081: * @param url the <CODE>URL</CODE> where the image can be found
082: * @throws BadElementException on error
083: * @throws IOException on error
084: */
085:
086: public ImgWMF(URL url) throws BadElementException, IOException {
087: super (url);
088: processParameters();
089: }
090:
091: /**
092: * Constructs an <CODE>ImgWMF</CODE>-object, using a <VAR>filename</VAR>.
093: *
094: * @param filename a <CODE>String</CODE>-representation of the file that contains the image.
095: * @throws BadElementException on error
096: * @throws MalformedURLException on error
097: * @throws IOException on error
098: */
099:
100: public ImgWMF(String filename) throws BadElementException,
101: MalformedURLException, IOException {
102: this (Utilities.toURL(filename));
103: }
104:
105: /**
106: * Constructs an <CODE>ImgWMF</CODE>-object from memory.
107: *
108: * @param img the memory image
109: * @throws BadElementException on error
110: * @throws IOException on error
111: */
112:
113: public ImgWMF(byte[] img) throws BadElementException, IOException {
114: super ((URL) null);
115: rawData = img;
116: originalData = img;
117: processParameters();
118: }
119:
120: /**
121: * This method checks if the image is a valid WMF and processes some parameters.
122: * @throws BadElementException
123: * @throws IOException
124: */
125:
126: private void processParameters() throws BadElementException,
127: IOException {
128: type = IMGTEMPLATE;
129: originalType = ORIGINAL_WMF;
130: InputStream is = null;
131: try {
132: String errorID;
133: if (rawData == null) {
134: is = url.openStream();
135: errorID = url.toString();
136: } else {
137: is = new java.io.ByteArrayInputStream(rawData);
138: errorID = "Byte array";
139: }
140: InputMeta in = new InputMeta(is);
141: if (in.readInt() != 0x9AC6CDD7) {
142: throw new BadElementException(errorID
143: + " is not a valid placeable windows metafile.");
144: }
145: in.readWord();
146: int left = in.readShort();
147: int top = in.readShort();
148: int right = in.readShort();
149: int bottom = in.readShort();
150: int inch = in.readWord();
151: dpiX = 72;
152: dpiY = 72;
153: scaledHeight = (float) (bottom - top) / inch * 72f;
154: setTop(scaledHeight);
155: scaledWidth = (float) (right - left) / inch * 72f;
156: setRight(scaledWidth);
157: } finally {
158: if (is != null) {
159: is.close();
160: }
161: plainWidth = getWidth();
162: plainHeight = getHeight();
163: }
164: }
165:
166: /** Reads the WMF into a template.
167: * @param template the template to read to
168: * @throws IOException on error
169: * @throws DocumentException on error
170: */
171: public void readWMF(PdfTemplate template) throws IOException,
172: DocumentException {
173: setTemplateData(template);
174: template.setWidth(getWidth());
175: template.setHeight(getHeight());
176: InputStream is = null;
177: try {
178: if (rawData == null) {
179: is = url.openStream();
180: } else {
181: is = new java.io.ByteArrayInputStream(rawData);
182: }
183: MetaDo meta = new MetaDo(is, template);
184: meta.readAll();
185: } finally {
186: if (is != null) {
187: is.close();
188: }
189: }
190: }
191: }
|