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/*-- $Id$ --
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Fop" and "Apache Software Foundation" must not be used to
endorse or promote products derived from this software without prior
written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
James Tauber <jtauber@jtauber.com>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.fop.pdf;
/**
* class representing a font descriptor.
*
* Font descriptors are specified on page 222 and onwards of the PDF 1.3 spec.
*/
public class PDFFontDescriptor extends PDFObject {
// Required fields
protected int ascent;
protected int capHeight;
protected int descent;
protected int flags;
protected PDFRectangle fontBBox;
protected String basefont; //PDF-spec: FontName
protected int italicAngle;
protected int stemV;
// Optional fields
protected int stemH = 0;
protected int xHeight = 0;
protected int leading = 0;
protected int avgWidth = 0;
protected int maxWidth = 0;
protected int missingWidth = 0;
protected PDFStream fontfile;
//protected String charSet = null;
protected byte subtype;
/**
* create the /FontDescriptor object
*
* @param number the object's number
* @param ascent the maximum height above the baseline
* @param descent the maximum depth below the baseline
* @param capHeight height of the capital letters
* @param flags various characteristics of the font
* @param fontBBox the bounding box for the described font
* @param basefont the base font name
* @param italicAngle the angle of the vertical dominant strokes
* @param stemV the width of the dominant vertical stems of glyphs
*/
public PDFFontDescriptor(int number,
String basefont,
int ascent, int descent,
int capHeight, int flags,
PDFRectangle fontBBox,
int italicAngle, int stemV) {
/* generic creation of PDF object */
super(number);
/* set fields using paramaters */
this.basefont = basefont;
this.ascent = ascent;
this.descent = descent;
this.capHeight = capHeight;
this.flags = flags;
this.fontBBox = fontBBox;
this.italicAngle = italicAngle;
this.stemV = stemV;
}
/**
* set the optional metrics
*/
public void setMetrics(int avgWidth, int maxWidth, int missingWidth, int leading, int stemH, int xHeight) {
this.avgWidth = avgWidth;
this.maxWidth = maxWidth;
this.missingWidth = missingWidth;
this.leading = leading;
this.stemH = stemH;
this.xHeight = xHeight;
}
/**
* set the optional font file stream
*
* @param subtype the font type defined in the font stream
* @param fontfile the stream containing an embedded font
*/
public void setFontFile(byte subtype, PDFStream fontfile) {
this.subtype = subtype;
this.fontfile = fontfile;
}
//public void setCharSet(){}//for subset fonts
/**
* produce the PDF representation for the object
*
* @return the PDF
*/
public byte[] toPDF() {
StringBuffer p = new StringBuffer(
this.number + " " + this.generation
+ " obj\n<< /Type /FontDescriptor"
+ "\n/FontName /" + this.basefont);
p.append("\n/FontBBox "); p.append(fontBBox.toPDFString());
p.append("\n/Flags "); p.append(flags);
p.append("\n/CapHeight "); p.append(capHeight);
p.append("\n/Ascent "); p.append(ascent);
p.append("\n/Descent "); p.append(descent);
p.append("\n/ItalicAngle "); p.append(italicAngle);
p.append("\n/StemV "); p.append(stemV);
// optional fields
if (stemH != 0) {
p.append("\n/StemH "); p.append(stemH);
}
if (xHeight != 0) {
p.append("\n/XHeight "); p.append(xHeight);
}
if (avgWidth != 0) {
p.append("\n/AvgWidth "); p.append(avgWidth);
}
if (maxWidth != 0) {
p.append("\n/MaxWidth "); p.append(maxWidth);
}
if (missingWidth != 0) {
p.append("\n/MissingWidth "); p.append(missingWidth);
}
if (leading != 0) {
p.append("\n/Leading "); p.append(leading);
}
if (fontfile != null) {
switch (subtype) {
case PDFFont.TYPE1:
p.append("\n/FontFile ");
break;
case PDFFont.TRUETYPE:
p.append("\n/FontFile2 ");
break;
default:
p.append("\n/FontFile3 ");
}
p.append(fontfile.referencePDF());
}
// charSet for subset fonts // not yet implemented
// CID optional field
fillInPDF(p);
p.append("\n >>\nendobj\n");
return p.toString().getBytes();
}
/**
* fill in the specifics for the font's descriptor.
*
* the given buffer already contains the fields common to all descriptors.
*
* @param begin the buffer to be completed with the specific fields
*/
protected void fillInPDF(StringBuffer begin) {
}
}
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