/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.pdfbox.pdmodel.font;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.fontbox.cff.CFFCIDFont;
import org.apache.fontbox.cff.CFFFont;
import org.apache.fontbox.cff.CFFParser;
import org.apache.fontbox.cff.CFFType1Font;
import org.apache.fontbox.cff.Type2CharString;
import org.apache.fontbox.util.BoundingBox;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.io.IOUtils;
import org.apache.pdfbox.pdmodel.common.PDStream;
import org.apache.pdfbox.util.Matrix;
/**
* Type 0 CIDFont (CFF).
*
* @author Ben Litchfield
* @author John Hewson
*/
public class PDCIDFontType0 extends PDCIDFont
{
private static final Log LOG = LogFactory.getLog(PDCIDFontType0.class);
private final CFFCIDFont cidFont; // Top DICT that uses CIDFont operators
private final CFFType1Font t1Font; // Top DICT that does not use CIDFont operators
private final Map<Integer, Float> glyphHeights = new HashMap<Integer, Float>();
private final boolean isEmbedded;
private final boolean isDamaged;
private Float avgWidth = null;
private Matrix fontMatrix;
private AffineTransform fontMatrixTransform;
/**
* Constructor.
*
* @param fontDictionary The font dictionary according to the PDF specification.
*/
public PDCIDFontType0(COSDictionary fontDictionary, PDType0Font parent) throws IOException
{
super(fontDictionary, parent);
PDFontDescriptor fd = getFontDescriptor();
byte[] bytes = null;
if (fd != null)
{
PDStream ff3Stream = fd.getFontFile3();
if (ff3Stream != null)
{
bytes = IOUtils.toByteArray(ff3Stream.createInputStream());
}
}
if (bytes != null)
{
// embedded
CFFParser cffParser = new CFFParser();
boolean fontIsDamaged = false;
CFFFont cffFont = null;
try
{
cffFont = cffParser.parse(bytes).get(0);
}
catch (IOException e)
{
LOG.error("Can't read the embedded CFF font " + fd.getFontName(), e);
fontIsDamaged = true;
}
if (cffFont instanceof CFFCIDFont)
{
cidFont = (CFFCIDFont)cffFont;
t1Font = null;
}
else
{
cidFont = null;
t1Font = (CFFType1Font)cffFont;
}
isEmbedded = true;
isDamaged = fontIsDamaged;
}
else
{
// substitute
CFFCIDFont cidSub = ExternalFonts.getCFFCIDFont(getBaseFont());
if (cidSub != null)
{
cidFont = cidSub;
t1Font = null;
}
else
{
COSDictionary cidSystemInfo = (COSDictionary)
dict.getDictionaryObject(COSName.CIDSYSTEMINFO);
String registryOrdering = null;
if (cidSystemInfo != null)
{
String registry = cidSystemInfo.getNameAsString(COSName.REGISTRY);
String ordering = cidSystemInfo.getNameAsString(COSName.ORDERING);
if (registry != null && ordering != null)
{
registryOrdering = registry + "-" + ordering;
}
}
cidSub = ExternalFonts.getCFFCIDFontFallback(registryOrdering, getFontDescriptor());
cidFont = cidSub;
t1Font = null;
if (cidSub.getName().equals("AdobeBlank"))
{
// this error often indicates that the user needs to install the Adobe Reader
// Asian and Extended Language Pack
LOG.error("Missing CID-keyed font " + getBaseFont());
}
else
{
LOG.warn("Using fallback for CID-keyed font " + getBaseFont());
}
}
isEmbedded = false;
isDamaged = false;
}
fontMatrixTransform = getFontMatrix().createAffineTransform();
fontMatrixTransform.scale(1000, 1000);
}
@Override
public Matrix getFontMatrix()
{
if (fontMatrix == null)
{
List<Number> numbers;
if (cidFont != null)
{
numbers = cidFont.getFontMatrix();
}
else
{
numbers = t1Font.getFontMatrix();
}
if (numbers != null && numbers.size() == 6)
{
fontMatrix = new Matrix(numbers.get(0).floatValue(), numbers.get(1).floatValue(),
numbers.get(2).floatValue(), numbers.get(3).floatValue(),
numbers.get(4).floatValue(), numbers.get(5).floatValue());
}
else
{
fontMatrix = new Matrix(0.001f, 0, 0, 0.001f, 0, 0);
}
}
return fontMatrix;
}
@Override
public BoundingBox getBoundingBox()
{
if (cidFont != null)
{
return cidFont.getFontBBox();
}
else
{
return t1Font.getFontBBox();
}
}
/**
* Returns the embedded CFF CIDFont.
*/
public CFFFont getCFFFont()
{
if (cidFont != null)
{
return cidFont;
}
else
{
return t1Font;
}
}
/**
* Returns the Type 2 charstring for the given CID.
*
* @param cid CID
* @throws IOException if the charstring could not be read
*/
public Type2CharString getType2CharString(int cid) throws IOException
{
if (cidFont != null)
{
return cidFont.getType2CharString(cid);
}
else
{
return t1Font.getType2CharString(cid);
}
}
/**
* Returns the CID for the given character code. If not found then CID 0 is returned.
*
* @param code character code
* @return CID
*/
public int codeToCID(int code)
{
return parent.getCMap().toCID(code);
}
@Override
public int codeToGID(int code)
{
int cid = codeToCID(code);
if (cidFont != null)
{
// The CIDs shall be used to determine the GID value for the glyph procedure using the
// charset table in the CFF program
return cidFont.getCharset().getGIDForCID(cid);
}
else
{
// The CIDs shall be used directly as GID values
return cid;
}
}
@Override
public float getWidthFromFont(int code) throws IOException
{
int cid = codeToCID(code);
int width = getType2CharString(cid).getWidth();
Point2D p = new Point2D.Float(width, 0);
fontMatrixTransform.transform(p, p);
return (float)p.getX();
}
@Override
public boolean isEmbedded()
{
return isEmbedded;
}
@Override
public boolean isDamaged()
{
return isDamaged;
}
@Override
public float getHeight(int code) throws IOException
{
int cid = codeToCID(code);
float height = 0;
if (!glyphHeights.containsKey(cid))
{
height = (float) getType2CharString(cid).getBounds().getHeight();
glyphHeights.put(cid, height);
}
return height;
}
@Override
public float getAverageFontWidth()
{
if (avgWidth == null)
{
avgWidth = getAverageCharacterWidth();
}
return avgWidth;
}
// todo: this is a replacement for FontMetrics method
private float getAverageCharacterWidth()
{
// todo: not implemented, highly suspect
return 500;
}
}