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PDFBOX-5847: Improve performance of FileSystemFontProvider.scanFonts(…
…) by introducing an "only headers" mode for the font parsers where each table reads as little information as possible, by Mykola Bohdiuk git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1918773 13f79535-47bb-0310-9956-ffa450edef68
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197 changes: 110 additions & 87 deletions
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fontbox/src/main/java/org/apache/fontbox/ttf/CFFTable.java
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/* | ||
* 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. | ||
*/ | ||
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package org.apache.fontbox.ttf; | ||
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import java.io.IOException; | ||
import org.apache.fontbox.cff.CFFFont; | ||
import org.apache.fontbox.cff.CFFParser; | ||
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/** | ||
* PostScript font program (compact font format). | ||
*/ | ||
public class CFFTable extends TTFTable | ||
{ | ||
/** | ||
* A tag that identifies this table type. | ||
*/ | ||
public static final String TAG = "CFF "; | ||
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private CFFFont cffFont; | ||
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CFFTable() | ||
{ | ||
super(); | ||
} | ||
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/** | ||
* This will read the required data from the stream. | ||
* | ||
* @param ttf The font that is being read. | ||
* @param data The stream to read the data from. | ||
* @throws java.io.IOException If there is an error reading the data. | ||
*/ | ||
@Override | ||
void read(TrueTypeFont ttf, TTFDataStream data) throws IOException | ||
{ | ||
byte[] bytes = data.read((int)getLength()); | ||
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CFFParser parser = new CFFParser(); | ||
cffFont = parser.parse(bytes, new CFFBytesource(ttf)).get(0); | ||
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initialized = true; | ||
} | ||
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/** | ||
* Returns the CFF font, which is a compact representation of a PostScript Type 1, or CIDFont | ||
* | ||
* @return the associated CFF font | ||
*/ | ||
public CFFFont getFont() | ||
{ | ||
return cffFont; | ||
} | ||
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/** | ||
* Allows bytes to be re-read later by CFFParser. | ||
*/ | ||
private static class CFFBytesource implements CFFParser.ByteSource | ||
{ | ||
private final TrueTypeFont ttf; | ||
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CFFBytesource(TrueTypeFont ttf) | ||
{ | ||
this.ttf = ttf; | ||
} | ||
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@Override | ||
public byte[] getBytes() throws IOException | ||
{ | ||
return ttf.getTableBytes(ttf.getTableMap().get(CFFTable.TAG)); | ||
} | ||
} | ||
} | ||
/* | ||
* 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. | ||
*/ | ||
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package org.apache.fontbox.ttf; | ||
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import java.io.IOException; | ||
import org.apache.fontbox.cff.CFFFont; | ||
import org.apache.fontbox.cff.CFFParser; | ||
import org.apache.pdfbox.io.RandomAccessRead; | ||
import org.apache.pdfbox.io.RandomAccessReadBuffer; | ||
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/** | ||
* PostScript font program (compact font format). | ||
*/ | ||
public class CFFTable extends TTFTable | ||
{ | ||
/** | ||
* A tag that identifies this table type. | ||
*/ | ||
public static final String TAG = "CFF "; | ||
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private CFFFont cffFont; | ||
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CFFTable() | ||
{ | ||
super(); | ||
} | ||
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/** | ||
* This will read the required data from the stream. | ||
* | ||
* @param ttf The font that is being read. | ||
* @param data The stream to read the data from. | ||
* @throws java.io.IOException If there is an error reading the data. | ||
*/ | ||
@Override | ||
void read(TrueTypeFont ttf, TTFDataStream data) throws IOException | ||
{ | ||
byte[] bytes = data.read((int)getLength()); | ||
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CFFParser parser = new CFFParser(); | ||
cffFont = parser.parse(bytes, new CFFBytesource(ttf)).get(0); | ||
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initialized = true; | ||
} | ||
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/** {@inheritDoc} */ | ||
@Override | ||
void readHeaders(TrueTypeFont ttf, TTFDataStream data, FontHeaders outHeaders) throws IOException | ||
{ | ||
try (RandomAccessRead subReader = data.createSubView(getLength())) | ||
{ | ||
RandomAccessRead reader; | ||
if (subReader != null) | ||
{ | ||
reader = subReader; | ||
} | ||
else | ||
{ | ||
assert false : "It is inefficient to read TTFDataStream into an array"; | ||
byte[] bytes = data.read((int)getLength()); | ||
reader = new RandomAccessReadBuffer(bytes); | ||
} | ||
new CFFParser().parseFirstSubFontROS(reader, outHeaders); | ||
} | ||
} | ||
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/** | ||
* Returns the CFF font, which is a compact representation of a PostScript Type 1, or CIDFont | ||
* | ||
* @return the associated CFF font | ||
*/ | ||
public CFFFont getFont() | ||
{ | ||
return cffFont; | ||
} | ||
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/** | ||
* Allows bytes to be re-read later by CFFParser. | ||
*/ | ||
private static class CFFBytesource implements CFFParser.ByteSource | ||
{ | ||
private final TrueTypeFont ttf; | ||
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CFFBytesource(TrueTypeFont ttf) | ||
{ | ||
this.ttf = ttf; | ||
} | ||
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@Override | ||
public byte[] getBytes() throws IOException | ||
{ | ||
return ttf.getTableBytes(ttf.getTableMap().get(CFFTable.TAG)); | ||
} | ||
} | ||
} |
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