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PDF renderer implementation supporting the subset of PDF 1.4 specification.
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/*
* $Id: TrueTypeTable.java,v 1.3 2009/02/09 16:31:23 tomoke Exp $
*
* Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.sun.pdfview.font.ttf;
import java.nio.ByteBuffer;
/**
* The base class for TrueType tables. Specific tables can extend this
* to add more functionality
*/
public class TrueTypeTable {
/**
* Well known tables
*/
public static final int CMAP_TABLE = 0x636d6170;
public static final int GLYF_TABLE = 0x676c7966;
public static final int HEAD_TABLE = 0x68656164;
public static final int HHEA_TABLE = 0x68686561;
public static final int HMTX_TABLE = 0x686d7478;
public static final int MAXP_TABLE = 0x6d617870;
public static final int NAME_TABLE = 0x6e616d65;
public static final int POST_TABLE = 0x706f7374;
public static final int LOCA_TABLE = 0x6c6f6361;
/**
* This table's tag
*/
private int tag;
/**
* The data in this table, in ByteBuffer form
*/
private ByteBuffer data;
/**
* Creates a new instance of TrueTypeTable.
*
* This method is protected. Use the getTable()
methods
* to get new instances.
*
* @param tag the tag for this table
*/
protected TrueTypeTable(int tag) {
this.tag = tag;
}
/**
* Get a new instance of an empty table by tag string
*
* @param ttf the font that contains this table
* @param tagString the tag for this table, as a 4 character string
* (e.g. head or cmap)
*/
public static TrueTypeTable createTable(TrueTypeFont ttf,
String tagString) {
return createTable(ttf, tagString, null);
}
/**
* Get a new instance of a table with provided data
*
* @param ttf the font that contains this table
* @param tagString the tag for this table, as a 4 character string
* (e.g. head or cmap)
* @param data the table data
*/
public static TrueTypeTable createTable(TrueTypeFont ttf,
String tagString, ByteBuffer data) {
TrueTypeTable outTable = null;
int tag = stringToTag(tagString);
switch (tag) {
case CMAP_TABLE: // cmap table
outTable = new CmapTable();
break;
case GLYF_TABLE:
outTable = new GlyfTable(ttf);
break;
case HEAD_TABLE: // head table
outTable = new HeadTable();
break;
case HHEA_TABLE: // hhea table
outTable = new HheaTable();
break;
case HMTX_TABLE:
outTable = new HmtxTable(ttf);
break;
case LOCA_TABLE:
outTable = new LocaTable(ttf);
break;
case MAXP_TABLE: // maxp table
outTable = new MaxpTable();
break;
case NAME_TABLE: // name table
outTable = new NameTable();
break;
case POST_TABLE: // post table
outTable = new PostTable();
break;
default:
outTable = new TrueTypeTable(tag);
break;
}
if (data != null) {
outTable.setData(data);
}
return outTable;
}
/**
* Get the table's tag
*/
public int getTag() {
return tag;
}
/**
* Get the data in the table
*/
public ByteBuffer getData() {
return data;
}
/**
* Set the data in the table
*/
public void setData(ByteBuffer data) {
this.data = data;
}
/**
* Get the size of the table, in bytes
*/
public int getLength() {
return getData().remaining();
}
/**
* Get the tag as a string
*/
public static String tagToString(int tag) {
char[] c = new char[4];
c[0] = (char) (0xff & (tag >> 24));
c[1] = (char) (0xff & (tag >> 16));
c[2] = (char) (0xff & (tag >> 8));
c[3] = (char) (0xff & (tag));
return new String(c);
}
/**
* Turn a string into a tag
*/
public static int stringToTag(String tag) {
char[] c = tag.toCharArray();
if (c.length != 4) {
throw new IllegalArgumentException("Bad tag length: " + tag);
}
return c[0] << 24 | c[1] << 16 | c[2] << 8 | c[3];
}
/**
* Put into a nice string
*/
public String toString() {
String out = " " + tagToString(getTag()) + " Table. Data is: ";
if (getData() == null) {
out += "not set";
} else {
out += "set";
}
return out;
}
}