com.itextpdf.text.pdf.PdfResources Maven / Gradle / Ivy
/*
* $Id: 22fbad8106b671e2dc3a51108c54b5f668f63fd8 $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2016 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
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* See the GNU Affero General Public License for more details.
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* http://itextpdf.com/terms-of-use/
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* 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
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*/
package com.itextpdf.text.pdf;
/**
* PdfResources is the PDF Resources-object.
*
* The marking operations for drawing a page are stored in a stream that is the value of the
* Contents key in the Page object's dictionary. Each marking context includes a list
* of the named resources it uses. This resource list is stored as a dictionary that is the
* value of the context's Resources key, and it serves two functions: it enumerates
* the named resources in the contents stream, and it established the mapping from the names
* to the objects used by the marking operations.
* This object is described in the 'Portable Document Format Reference Manual version 1.3'
* section 7.5 (page 195-197).
*
* @see PdfPage
*/
class PdfResources extends PdfDictionary {
// constructor
/**
* Constructs a PDF ResourcesDictionary.
*/
PdfResources() {
super();
}
// methods
void add(PdfName key, PdfDictionary resource) {
if (resource.size() == 0)
return;
PdfDictionary dic = getAsDict(key);
if (dic == null)
put(key, resource);
else
dic.putAll(resource);
}
}