Java example source code file (TrueTypeFont.java)
The TrueTypeFont.java Java example source code/*
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.font;
import java.awt.Font;
import java.awt.FontFormatException;
import java.awt.GraphicsEnvironment;
import java.awt.geom.Point2D;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.IntBuffer;
import java.nio.ShortBuffer;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.FileChannel;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Locale;
import sun.java2d.Disposer;
import sun.java2d.DisposerRecord;
/**
* TrueTypeFont is not called SFntFont because it is not expected
* to handle all types that may be housed in a such a font file.
* If additional types are supported later, it may make sense to
* create an SFnt superclass. Eg to handle sfnt-housed postscript fonts.
* OpenType fonts are handled by this class, and possibly should be
* represented by a subclass.
* An instance stores some information from the font file to faciliate
* faster access. File size, the table directory and the names of the font
* are the most important of these. It amounts to approx 400 bytes
* for a typical font. Systems with mutiple locales sometimes have up to 400
* font files, and an app which loads all font files would need around
* 160Kbytes. So storing any more info than this would be expensive.
*/
public class TrueTypeFont extends FileFont {
/* -- Tags for required TrueType tables */
public static final int cmapTag = 0x636D6170; // 'cmap'
public static final int glyfTag = 0x676C7966; // 'glyf'
public static final int headTag = 0x68656164; // 'head'
public static final int hheaTag = 0x68686561; // 'hhea'
public static final int hmtxTag = 0x686D7478; // 'hmtx'
public static final int locaTag = 0x6C6F6361; // 'loca'
public static final int maxpTag = 0x6D617870; // 'maxp'
public static final int nameTag = 0x6E616D65; // 'name'
public static final int postTag = 0x706F7374; // 'post'
public static final int os_2Tag = 0x4F532F32; // 'OS/2'
/* -- Tags for opentype related tables */
public static final int GDEFTag = 0x47444546; // 'GDEF'
public static final int GPOSTag = 0x47504F53; // 'GPOS'
public static final int GSUBTag = 0x47535542; // 'GSUB'
public static final int mortTag = 0x6D6F7274; // 'mort'
/* -- Tags for non-standard tables */
public static final int fdscTag = 0x66647363; // 'fdsc' - gxFont descriptor
public static final int fvarTag = 0x66766172; // 'fvar' - gxFont variations
public static final int featTag = 0x66656174; // 'feat' - layout features
public static final int EBLCTag = 0x45424C43; // 'EBLC' - embedded bitmaps
public static final int gaspTag = 0x67617370; // 'gasp' - hint/smooth sizes
/* -- Other tags */
public static final int ttcfTag = 0x74746366; // 'ttcf' - TTC file
public static final int v1ttTag = 0x00010000; // 'v1tt' - Version 1 TT font
public static final int trueTag = 0x74727565; // 'true' - Version 2 TT font
public static final int ottoTag = 0x4f54544f; // 'otto' - OpenType font
/* -- ID's used in the 'name' table */
public static final int MS_PLATFORM_ID = 3;
/* MS locale id for US English is the "default" */
public static final short ENGLISH_LOCALE_ID = 0x0409; // 1033 decimal
public static final int FAMILY_NAME_ID = 1;
// public static final int STYLE_WEIGHT_ID = 2; // currently unused.
public static final int FULL_NAME_ID = 4;
public static final int POSTSCRIPT_NAME_ID = 6;
private static final short US_LCID = 0x0409; // US English - default
private static Map<String, Short> lcidMap;
static class DirectoryEntry {
int tag;
int offset;
int length;
}
/* There is a pool which limits the number of fd's that are in
* use. Normally fd's are closed as they are replaced in the pool.
* But if an instance of this class becomes unreferenced, then there
* needs to be a way to close the fd. A finalize() method could do this,
* but using the Disposer class will ensure its called in a more timely
* manner. This is not something which should be relied upon to free
* fd's - its a safeguard.
*/
private static class TTDisposerRecord implements DisposerRecord {
FileChannel channel = null;
public synchronized void dispose() {
try {
if (channel != null) {
channel.close();
}
} catch (IOException e) {
} finally {
channel = null;
}
}
}
TTDisposerRecord disposerRecord = new TTDisposerRecord();
/* > 0 only if this font is a part of a collection */
int fontIndex = 0;
/* Number of fonts in this collection. ==1 if not a collection */
int directoryCount = 1;
/* offset in file of table directory for this font */
int directoryOffset; // 12 if its not a collection.
/* number of table entries in the directory/offsets table */
int numTables;
/* The contents of the the directory/offsets table */
DirectoryEntry []tableDirectory;
// protected byte []gposTable = null;
// protected byte []gdefTable = null;
// protected byte []gsubTable = null;
// protected byte []mortTable = null;
// protected boolean hintsTabledChecked = false;
// protected boolean containsHintsTable = false;
/* These fields are set from os/2 table info. */
private boolean supportsJA;
private boolean supportsCJK;
/* These are for faster access to the name of the font as
* typically exposed via API to applications.
*/
private Locale nameLocale;
private String localeFamilyName;
private String localeFullName;
/**
* - does basic verification of the file
* - reads the header table for this font (within a collection)
* - reads the names (full, family).
* - determines the style of the font.
* - initializes the CMAP
* @throws FontFormatException - if the font can't be opened
* or fails verification, or there's no usable cmap
*/
public TrueTypeFont(String platname, Object nativeNames, int fIndex,
boolean javaRasterizer)
throws FontFormatException {
super(platname, nativeNames);
useJavaRasterizer = javaRasterizer;
fontRank = Font2D.TTF_RANK;
try {
verify();
init(fIndex);
} catch (Throwable t) {
close();
if (t instanceof FontFormatException) {
throw (FontFormatException)t;
} else {
throw new FontFormatException("Unexpected runtime exception.");
}
}
Disposer.addObjectRecord(this, disposerRecord);
}
/* Enable natives just for fonts picked up from the platform that
* may have external bitmaps on Solaris. Could do this just for
* the fonts that are specified in font configuration files which
* would lighten the burden (think about that).
* The EBLCTag is used to skip natives for fonts that contain embedded
* bitmaps as there's no need to use X11 for those fonts.
* Skip all the latin fonts as they don't need this treatment.
* Further refine this to fonts that are natively accessible (ie
* as PCF bitmap fonts on the X11 font path).
* This method is called when creating the first strike for this font.
*/
@Override
protected boolean checkUseNatives() {
if (checkedNatives) {
return useNatives;
}
if (!FontUtilities.isSolaris || useJavaRasterizer ||
FontUtilities.useT2K || nativeNames == null ||
getDirectoryEntry(EBLCTag) != null ||
GraphicsEnvironment.isHeadless()) {
checkedNatives = true;
return false; /* useNatives is false */
} else if (nativeNames instanceof String) {
String name = (String)nativeNames;
/* Don't do do this for Latin fonts */
if (name.indexOf("8859") > 0) {
checkedNatives = true;
return false;
} else if (NativeFont.hasExternalBitmaps(name)) {
nativeFonts = new NativeFont[1];
try {
nativeFonts[0] = new NativeFont(name, true);
/* If reach here we have an non-latin font that has
* external bitmaps and we successfully created it.
*/
useNatives = true;
} catch (FontFormatException e) {
nativeFonts = null;
}
}
} else if (nativeNames instanceof String[]) {
String[] natNames = (String[])nativeNames;
int numNames = natNames.length;
boolean externalBitmaps = false;
for (int nn = 0; nn < numNames; nn++) {
if (natNames[nn].indexOf("8859") > 0) {
checkedNatives = true;
return false;
} else if (NativeFont.hasExternalBitmaps(natNames[nn])) {
externalBitmaps = true;
}
}
if (!externalBitmaps) {
checkedNatives = true;
return false;
}
useNatives = true;
nativeFonts = new NativeFont[numNames];
for (int nn = 0; nn < numNames; nn++) {
try {
nativeFonts[nn] = new NativeFont(natNames[nn], true);
} catch (FontFormatException e) {
useNatives = false;
nativeFonts = null;
}
}
}
if (useNatives) {
glyphToCharMap = new char[getMapper().getNumGlyphs()];
}
checkedNatives = true;
return useNatives;
}
/* This is intended to be called, and the returned value used,
* from within a block synchronized on this font object.
* ie the channel returned may be nulled out at any time by "close()"
* unless the caller holds a lock.
* Deadlock warning: FontManager.addToPool(..) acquires a global lock,
* which means nested locks may be in effect.
*/
private synchronized FileChannel open() throws FontFormatException {
if (disposerRecord.channel == null) {
if (FontUtilities.isLogging()) {
FontUtilities.getLogger().info("open TTF: " + platName);
}
try {
RandomAccessFile raf = (RandomAccessFile)
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction() {
public Object run() {
try {
return new RandomAccessFile(platName, "r");
} catch (FileNotFoundException ffne) {
}
return null;
}
});
disposerRecord.channel = raf.getChannel();
fileSize = (int)disposerRecord.channel.size();
FontManager fm = FontManagerFactory.getInstance();
if (fm instanceof SunFontManager) {
((SunFontManager) fm).addToPool(this);
}
} catch (NullPointerException e) {
close();
throw new FontFormatException(e.toString());
} catch (ClosedChannelException e) {
/* NIO I/O is interruptible, recurse to retry operation.
* The call to channel.size() above can throw this exception.
* Clear interrupts before recursing in case NIO didn't.
* Note that close() sets disposerRecord.channel to null.
*/
Thread.interrupted();
close();
open();
} catch (IOException e) {
close();
throw new FontFormatException(e.toString());
}
}
return disposerRecord.channel;
}
protected synchronized void close() {
disposerRecord.dispose();
}
int readBlock(ByteBuffer buffer, int offset, int length) {
int bread = 0;
try {
synchronized (this) {
if (disposerRecord.channel == null) {
open();
}
if (offset + length > fileSize) {
if (offset >= fileSize) {
/* Since the caller ensures that offset is < fileSize
* this condition suggests that fileSize is now
* different than the value we originally provided
* to native when the scaler was created.
* Also fileSize is updated every time we
* open() the file here, but in native the value
* isn't updated. If the file has changed whilst we
* are executing we want to bail, not spin.
*/
if (FontUtilities.isLogging()) {
String msg = "Read offset is " + offset +
" file size is " + fileSize+
" file is " + platName;
FontUtilities.getLogger().severe(msg);
}
return -1;
} else {
length = fileSize - offset;
}
}
buffer.clear();
disposerRecord.channel.position(offset);
while (bread < length) {
int cnt = disposerRecord.channel.read(buffer);
if (cnt == -1) {
String msg = "Unexpected EOF " + this;
int currSize = (int)disposerRecord.channel.size();
if (currSize != fileSize) {
msg += " File size was " + fileSize +
" and now is " + currSize;
}
if (FontUtilities.isLogging()) {
FontUtilities.getLogger().severe(msg);
}
// We could still flip() the buffer here because
// it's possible that we did read some data in
// an earlier loop, and we probably should
// return that to the caller. Although if
// the caller expected 8K of data and we return
// only a few bytes then maybe it's better instead to
// set bread = -1 to indicate failure.
// The following is therefore using arbitrary values
// but is meant to allow cases where enough
// data was read to probably continue.
if (bread > length/2 || bread > 16384) {
buffer.flip();
if (FontUtilities.isLogging()) {
msg = "Returning " + bread +
" bytes instead of " + length;
FontUtilities.getLogger().severe(msg);
}
} else {
bread = -1;
}
throw new IOException(msg);
}
bread += cnt;
}
buffer.flip();
if (bread > length) { // possible if buffer.size() > length
bread = length;
}
}
} catch (FontFormatException e) {
if (FontUtilities.isLogging()) {
FontUtilities.getLogger().severe(
"While reading " + platName, e);
}
bread = -1; // signal EOF
deregisterFontAndClearStrikeCache();
} catch (ClosedChannelException e) {
/* NIO I/O is interruptible, recurse to retry operation.
* Clear interrupts before recursing in case NIO didn't.
*/
Thread.interrupted();
close();
return readBlock(buffer, offset, length);
} catch (IOException e) {
/* If we did not read any bytes at all and the exception is
* not a recoverable one (ie is not ClosedChannelException) then
* we should indicate that there is no point in re-trying.
* Other than an attempt to read past the end of the file it
* seems unlikely this would occur as problems opening the
* file are handled as a FontFormatException.
*/
if (FontUtilities.isLogging()) {
FontUtilities.getLogger().severe(
"While reading " + platName, e);
}
if (bread == 0) {
bread = -1; // signal EOF
deregisterFontAndClearStrikeCache();
}
}
return bread;
}
ByteBuffer readBlock(int offset, int length) {
ByteBuffer buffer = ByteBuffer.allocate(length);
try {
synchronized (this) {
if (disposerRecord.channel == null) {
open();
}
if (offset + length > fileSize) {
if (offset > fileSize) {
return null; // assert?
} else {
buffer = ByteBuffer.allocate(fileSize-offset);
}
}
disposerRecord.channel.position(offset);
disposerRecord.channel.read(buffer);
buffer.flip();
}
} catch (FontFormatException e) {
return null;
} catch (ClosedChannelException e) {
/* NIO I/O is interruptible, recurse to retry operation.
* Clear interrupts before recursing in case NIO didn't.
*/
Thread.interrupted();
close();
readBlock(buffer, offset, length);
} catch (IOException e) {
return null;
}
return buffer;
}
/* This is used by native code which can't allocate a direct byte
* buffer because of bug 4845371. It, and references to it in native
* code in scalerMethods.c can be removed once that bug is fixed.
* 4845371 is now fixed but we'll keep this around as it doesn't cost
* us anything if its never used/called.
*/
byte[] readBytes(int offset, int length) {
ByteBuffer buffer = readBlock(offset, length);
if (buffer.hasArray()) {
return buffer.array();
} else {
byte[] bufferBytes = new byte[buffer.limit()];
buffer.get(bufferBytes);
return bufferBytes;
}
}
private void verify() throws FontFormatException {
open();
}
/* sizes, in bytes, of TT/TTC header records */
private static final int TTCHEADERSIZE = 12;
private static final int DIRECTORYHEADERSIZE = 12;
private static final int DIRECTORYENTRYSIZE = 16;
protected void init(int fIndex) throws FontFormatException {
int headerOffset = 0;
ByteBuffer buffer = readBlock(0, TTCHEADERSIZE);
try {
switch (buffer.getInt()) {
case ttcfTag:
buffer.getInt(); // skip TTC version ID
directoryCount = buffer.getInt();
if (fIndex >= directoryCount) {
throw new FontFormatException("Bad collection index");
}
fontIndex = fIndex;
buffer = readBlock(TTCHEADERSIZE+4*fIndex, 4);
headerOffset = buffer.getInt();
break;
case v1ttTag:
case trueTag:
case ottoTag:
break;
default:
throw new FontFormatException("Unsupported sfnt " +
getPublicFileName());
}
/* Now have the offset of this TT font (possibly within a TTC)
* After the TT version/scaler type field, is the short
* representing the number of tables in the table directory.
* The table directory begins at 12 bytes after the header.
* Each table entry is 16 bytes long (4 32-bit ints)
*/
buffer = readBlock(headerOffset+4, 2);
numTables = buffer.getShort();
directoryOffset = headerOffset+DIRECTORYHEADERSIZE;
ByteBuffer bbuffer = readBlock(directoryOffset,
numTables*DIRECTORYENTRYSIZE);
IntBuffer ibuffer = bbuffer.asIntBuffer();
DirectoryEntry table;
tableDirectory = new DirectoryEntry[numTables];
for (int i=0; i<numTables;i++) {
tableDirectory[i] = table = new DirectoryEntry();
table.tag = ibuffer.get();
/* checksum */ ibuffer.get();
table.offset = ibuffer.get();
table.length = ibuffer.get();
if (table.offset + table.length > fileSize) {
throw new FontFormatException("bad table, tag="+table.tag);
}
}
if (getDirectoryEntry(headTag) == null) {
throw new FontFormatException("missing head table");
}
if (getDirectoryEntry(maxpTag) == null) {
throw new FontFormatException("missing maxp table");
}
if (getDirectoryEntry(hmtxTag) != null
&& getDirectoryEntry(hheaTag) == null) {
throw new FontFormatException("missing hhea table");
}
initNames();
} catch (Exception e) {
if (FontUtilities.isLogging()) {
FontUtilities.getLogger().severe(e.toString());
}
if (e instanceof FontFormatException) {
throw (FontFormatException)e;
} else {
throw new FontFormatException(e.toString());
}
}
if (familyName == null || fullName == null) {
throw new FontFormatException("Font name not found");
}
/* The os2_Table is needed to gather some info, but we don't
* want to keep it around (as a field) so obtain it once and
* pass it to the code that needs it.
*/
ByteBuffer os2_Table = getTableBuffer(os_2Tag);
setStyle(os2_Table);
setCJKSupport(os2_Table);
}
/* The array index corresponds to a bit offset in the TrueType
* font's OS/2 compatibility table's code page ranges fields.
* These are two 32 bit unsigned int fields at offsets 78 and 82.
* We are only interested in determining if the font supports
* the windows encodings we expect as the default encoding in
* supported locales, so we only map the first of these fields.
*/
static final String encoding_mapping[] = {
"cp1252", /* 0:Latin 1 */
"cp1250", /* 1:Latin 2 */
"cp1251", /* 2:Cyrillic */
"cp1253", /* 3:Greek */
"cp1254", /* 4:Turkish/Latin 5 */
"cp1255", /* 5:Hebrew */
"cp1256", /* 6:Arabic */
"cp1257", /* 7:Windows Baltic */
"", /* 8:reserved for alternate ANSI */
"", /* 9:reserved for alternate ANSI */
"", /* 10:reserved for alternate ANSI */
"", /* 11:reserved for alternate ANSI */
"", /* 12:reserved for alternate ANSI */
"", /* 13:reserved for alternate ANSI */
"", /* 14:reserved for alternate ANSI */
"", /* 15:reserved for alternate ANSI */
"ms874", /* 16:Thai */
"ms932", /* 17:JIS/Japanese */
"gbk", /* 18:PRC GBK Cp950 */
"ms949", /* 19:Korean Extended Wansung */
"ms950", /* 20:Chinese (Taiwan, Hongkong, Macau) */
"ms1361", /* 21:Korean Johab */
"", /* 22 */
"", /* 23 */
"", /* 24 */
"", /* 25 */
"", /* 26 */
"", /* 27 */
"", /* 28 */
"", /* 29 */
"", /* 30 */
"", /* 31 */
};
/* This maps two letter language codes to a Windows code page.
* Note that eg Cp1252 (the first subarray) is not exactly the same as
* Latin-1 since Windows code pages are do not necessarily correspond.
* There are two codepages for zh and ko so if a font supports
* only one of these ranges then we need to distinguish based on
* country. So far this only seems to matter for zh.
* REMIND: Unicode locales such as Hindi do not have a code page so
* this whole mechanism needs to be revised to map languages to
* the Unicode ranges either when this fails, or as an additional
* validating test. Basing it on Unicode ranges should get us away
* from needing to map to this small and incomplete set of Windows
* code pages which looks odd on non-Windows platforms.
*/
private static final String languages[][] = {
/* cp1252/Latin 1 */
{ "en", "ca", "da", "de", "es", "fi", "fr", "is", "it",
"nl", "no", "pt", "sq", "sv", },
/* cp1250/Latin2 */
{ "cs", "cz", "et", "hr", "hu", "nr", "pl", "ro", "sk",
"sl", "sq", "sr", },
/* cp1251/Cyrillic */
{ "bg", "mk", "ru", "sh", "uk" },
/* cp1253/Greek*/
{ "el" },
/* cp1254/Turkish,Latin 5 */
{ "tr" },
/* cp1255/Hebrew */
{ "he" },
/* cp1256/Arabic */
{ "ar" },
/* cp1257/Windows Baltic */
{ "et", "lt", "lv" },
/* ms874/Thai */
{ "th" },
/* ms932/Japanese */
{ "ja" },
/* gbk/Chinese (PRC GBK Cp950) */
{ "zh", "zh_CN", },
/* ms949/Korean Extended Wansung */
{ "ko" },
/* ms950/Chinese (Taiwan, Hongkong, Macau) */
{ "zh_HK", "zh_TW", },
/* ms1361/Korean Johab */
{ "ko" },
};
private static final String codePages[] = {
"cp1252",
"cp1250",
"cp1251",
"cp1253",
"cp1254",
"cp1255",
"cp1256",
"cp1257",
"ms874",
"ms932",
"gbk",
"ms949",
"ms950",
"ms1361",
};
private static String defaultCodePage = null;
static String getCodePage() {
if (defaultCodePage != null) {
return defaultCodePage;
}
if (FontUtilities.isWindows) {
defaultCodePage =
(String)java.security.AccessController.doPrivileged(
new sun.security.action.GetPropertyAction("file.encoding"));
} else {
if (languages.length != codePages.length) {
throw new InternalError("wrong code pages array length");
}
Locale locale = sun.awt.SunToolkit.getStartupLocale();
String language = locale.getLanguage();
if (language != null) {
if (language.equals("zh")) {
String country = locale.getCountry();
if (country != null) {
language = language + "_" + country;
}
}
for (int i=0; i<languages.length;i++) {
for (int l=0;l<languages[i].length; l++) {
if (language.equals(languages[i][l])) {
defaultCodePage = codePages[i];
return defaultCodePage;
}
}
}
}
}
if (defaultCodePage == null) {
defaultCodePage = "";
}
return defaultCodePage;
}
/* Theoretically, reserved bits must not be set, include symbol bits */
public static final int reserved_bits1 = 0x80000000;
public static final int reserved_bits2 = 0x0000ffff;
@Override
boolean supportsEncoding(String encoding) {
if (encoding == null) {
encoding = getCodePage();
}
if ("".equals(encoding)) {
return false;
}
encoding = encoding.toLowerCase();
/* java_props_md.c has a couple of special cases
* if language packs are installed. In these encodings the
* fontconfig files pick up different fonts :
* SimSun-18030 and MingLiU_HKSCS. Since these fonts will
* indicate they support the base encoding, we need to rewrite
* these encodings here before checking the map/array.
*/
if (encoding.equals("gb18030")) {
encoding = "gbk";
} else if (encoding.equals("ms950_hkscs")) {
encoding = "ms950";
}
ByteBuffer buffer = getTableBuffer(os_2Tag);
/* required info is at offsets 78 and 82 */
if (buffer == null || buffer.capacity() < 86) {
return false;
}
int range1 = buffer.getInt(78); /* ulCodePageRange1 */
int range2 = buffer.getInt(82); /* ulCodePageRange2 */
/* This test is too stringent for Arial on Solaris (and perhaps
* other fonts). Arial has at least one reserved bit set for an
* unknown reason.
*/
// if (((range1 & reserved_bits1) | (range2 & reserved_bits2)) != 0) {
// return false;
// }
for (int em=0; em<encoding_mapping.length; em++) {
if (encoding_mapping[em].equals(encoding)) {
if (((1 << em) & range1) != 0) {
return true;
}
}
}
return false;
}
/* Use info in the os_2Table to test CJK support */
private void setCJKSupport(ByteBuffer os2Table) {
/* required info is in ulong at offset 46 */
if (os2Table == null || os2Table.capacity() < 50) {
return;
}
int range2 = os2Table.getInt(46); /* ulUnicodeRange2 */
/* Any of these bits set in the 32-63 range indicate a font with
* support for a CJK range. We aren't looking at some other bits
* in the 64-69 range such as half width forms as its unlikely a font
* would include those and none of these.
*/
supportsCJK = ((range2 & 0x29bf0000) != 0);
/* This should be generalised, but for now just need to know if
* Hiragana or Katakana ranges are supported by the font.
* In the 4 longs representing unicode ranges supported
* bits 49 & 50 indicate hiragana and katakana
* This is bits 17 & 18 in the 2nd ulong. If either is supported
* we presume this is a JA font.
*/
supportsJA = ((range2 & 0x60000) != 0);
}
boolean supportsJA() {
return supportsJA;
}
ByteBuffer getTableBuffer(int tag) {
DirectoryEntry entry = null;
for (int i=0;i<numTables;i++) {
if (tableDirectory[i].tag == tag) {
entry = tableDirectory[i];
break;
}
}
if (entry == null || entry.length == 0 ||
entry.offset+entry.length > fileSize) {
return null;
}
int bread = 0;
ByteBuffer buffer = ByteBuffer.allocate(entry.length);
synchronized (this) {
try {
if (disposerRecord.channel == null) {
open();
}
disposerRecord.channel.position(entry.offset);
bread = disposerRecord.channel.read(buffer);
buffer.flip();
} catch (ClosedChannelException e) {
/* NIO I/O is interruptible, recurse to retry operation.
* Clear interrupts before recursing in case NIO didn't.
*/
Thread.interrupted();
close();
return getTableBuffer(tag);
} catch (IOException e) {
return null;
} catch (FontFormatException e) {
return null;
}
if (bread < entry.length) {
return null;
} else {
return buffer;
}
}
}
/* NB: is it better to move declaration to Font2D? */
long getLayoutTableCache() {
try {
return getScaler().getLayoutTableCache();
} catch(FontScalerException fe) {
return 0L;
}
}
@Override
byte[] getTableBytes(int tag) {
ByteBuffer buffer = getTableBuffer(tag);
if (buffer == null) {
return null;
} else if (buffer.hasArray()) {
try {
return buffer.array();
} catch (Exception re) {
}
}
byte []data = new byte[getTableSize(tag)];
buffer.get(data);
return data;
}
int getTableSize(int tag) {
for (int i=0;i<numTables;i++) {
if (tableDirectory[i].tag == tag) {
return tableDirectory[i].length;
}
}
return 0;
}
int getTableOffset(int tag) {
for (int i=0;i<numTables;i++) {
if (tableDirectory[i].tag == tag) {
return tableDirectory[i].offset;
}
}
return 0;
}
DirectoryEntry getDirectoryEntry(int tag) {
for (int i=0;i<numTables;i++) {
if (tableDirectory[i].tag == tag) {
return tableDirectory[i];
}
}
return null;
}
/* Used to determine if this size has embedded bitmaps, which
* for CJK fonts should be used in preference to LCD glyphs.
*/
boolean useEmbeddedBitmapsForSize(int ptSize) {
if (!supportsCJK) {
return false;
}
if (getDirectoryEntry(EBLCTag) == null) {
return false;
}
ByteBuffer eblcTable = getTableBuffer(EBLCTag);
int numSizes = eblcTable.getInt(4);
/* The bitmapSizeTable's start at offset of 8.
* Each bitmapSizeTable entry is 48 bytes.
* The offset of ppemY in the entry is 45.
*/
for (int i=0;i<numSizes;i++) {
int ppemY = eblcTable.get(8+(i*48)+45) &0xff;
if (ppemY == ptSize) {
return true;
}
}
return false;
}
public String getFullName() {
return fullName;
}
/* This probably won't get called but is there to support the
* contract() of setStyle() defined in the superclass.
*/
@Override
protected void setStyle() {
setStyle(getTableBuffer(os_2Tag));
}
/* TrueTypeFont can use the fsSelection fields of OS/2 table
* to determine the style. In the unlikely case that doesn't exist,
* can use macStyle in the 'head' table but simpler to
* fall back to super class algorithm of looking for well known string.
* A very few fonts don't specify this information, but I only
* came across one: Lucida Sans Thai Typewriter Oblique in
* /usr/openwin/lib/locale/th_TH/X11/fonts/TrueType/lucidai.ttf
* that explicitly specified the wrong value. It says its regular.
* I didn't find any fonts that were inconsistent (ie regular plus some
* other value).
*/
private static final int fsSelectionItalicBit = 0x00001;
private static final int fsSelectionBoldBit = 0x00020;
private static final int fsSelectionRegularBit = 0x00040;
private void setStyle(ByteBuffer os_2Table) {
/* fsSelection is unsigned short at buffer offset 62 */
if (os_2Table == null || os_2Table.capacity() < 64) {
super.setStyle();
return;
}
int fsSelection = os_2Table.getChar(62) & 0xffff;
int italic = fsSelection & fsSelectionItalicBit;
int bold = fsSelection & fsSelectionBoldBit;
int regular = fsSelection & fsSelectionRegularBit;
// System.out.println("platname="+platName+" font="+fullName+
// " family="+familyName+
// " R="+regular+" I="+italic+" B="+bold);
if (regular!=0 && ((italic|bold)!=0)) {
/* This is inconsistent. Try using the font name algorithm */
super.setStyle();
return;
} else if ((regular|italic|bold) == 0) {
/* No style specified. Try using the font name algorithm */
super.setStyle();
return;
}
switch (bold|italic) {
case fsSelectionItalicBit:
style = Font.ITALIC;
break;
case fsSelectionBoldBit:
if (FontUtilities.isSolaris && platName.endsWith("HG-GothicB.ttf")) {
/* Workaround for Solaris's use of a JA font that's marked as
* being designed bold, but is used as a PLAIN font.
*/
style = Font.PLAIN;
} else {
style = Font.BOLD;
}
break;
case fsSelectionBoldBit|fsSelectionItalicBit:
style = Font.BOLD|Font.ITALIC;
}
}
private float stSize, stPos, ulSize, ulPos;
private void setStrikethroughMetrics(ByteBuffer os_2Table, int upem) {
if (os_2Table == null || os_2Table.capacity() < 30 || upem < 0) {
stSize = .05f;
stPos = -.4f;
return;
}
ShortBuffer sb = os_2Table.asShortBuffer();
stSize = sb.get(13) / (float)upem;
stPos = -sb.get(14) / (float)upem;
}
private void setUnderlineMetrics(ByteBuffer postTable, int upem) {
if (postTable == null || postTable.capacity() < 12 || upem < 0) {
ulSize = .05f;
ulPos = .1f;
return;
}
ShortBuffer sb = postTable.asShortBuffer();
ulSize = sb.get(5) / (float)upem;
ulPos = -sb.get(4) / (float)upem;
}
@Override
public void getStyleMetrics(float pointSize, float[] metrics, int offset) {
if (ulSize == 0f && ulPos == 0f) {
ByteBuffer head_Table = getTableBuffer(headTag);
int upem = -1;
if (head_Table != null && head_Table.capacity() >= 18) {
ShortBuffer sb = head_Table.asShortBuffer();
upem = sb.get(9) & 0xffff;
if (upem < 16 || upem > 16384) {
upem = 2048;
}
}
ByteBuffer os2_Table = getTableBuffer(os_2Tag);
setStrikethroughMetrics(os2_Table, upem);
ByteBuffer post_Table = getTableBuffer(postTag);
setUnderlineMetrics(post_Table, upem);
}
metrics[offset] = stPos * pointSize;
metrics[offset+1] = stSize * pointSize;
metrics[offset+2] = ulPos * pointSize;
metrics[offset+3] = ulSize * pointSize;
}
private String makeString(byte[] bytes, int len, short encoding) {
/* Check for fonts using encodings 2->6 is just for
* some old DBCS fonts, apparently mostly on Solaris.
* Some of these fonts encode ascii names as double-byte characters.
* ie with a leading zero byte for what properly should be a
* single byte-char.
*/
if (encoding >=2 && encoding <= 6) {
byte[] oldbytes = bytes;
int oldlen = len;
bytes = new byte[oldlen];
len = 0;
for (int i=0; i<oldlen; i++) {
if (oldbytes[i] != 0) {
bytes[len++] = oldbytes[i];
}
}
}
String charset;
switch (encoding) {
case 1: charset = "UTF-16"; break; // most common case first.
case 0: charset = "UTF-16"; break; // symbol uses this
case 2: charset = "SJIS"; break;
case 3: charset = "GBK"; break;
case 4: charset = "MS950"; break;
case 5: charset = "EUC_KR"; break;
case 6: charset = "Johab"; break;
default: charset = "UTF-16"; break;
}
try {
return new String(bytes, 0, len, charset);
} catch (UnsupportedEncodingException e) {
if (FontUtilities.isLogging()) {
FontUtilities.getLogger().warning(e + " EncodingID=" + encoding);
}
return new String(bytes, 0, len);
} catch (Throwable t) {
return null;
}
}
protected void initNames() {
byte[] name = new byte[256];
ByteBuffer buffer = getTableBuffer(nameTag);
if (buffer != null) {
ShortBuffer sbuffer = buffer.asShortBuffer();
sbuffer.get(); // format - not needed.
short numRecords = sbuffer.get();
/* The name table uses unsigned shorts. Many of these
* are known small values that fit in a short.
* The values that are sizes or offsets into the table could be
* greater than 32767, so read and store those as ints
*/
int stringPtr = sbuffer.get() & 0xffff;
nameLocale = sun.awt.SunToolkit.getStartupLocale();
short nameLocaleID = getLCIDFromLocale(nameLocale);
for (int i=0; i<numRecords; i++) {
short platformID = sbuffer.get();
if (platformID != MS_PLATFORM_ID) {
sbuffer.position(sbuffer.position()+5);
continue; // skip over this record.
}
short encodingID = sbuffer.get();
short langID = sbuffer.get();
short nameID = sbuffer.get();
int nameLen = ((int) sbuffer.get()) & 0xffff;
int namePtr = (((int) sbuffer.get()) & 0xffff) + stringPtr;
String tmpName = null;
switch (nameID) {
case FAMILY_NAME_ID:
if (familyName == null || langID == ENGLISH_LOCALE_ID ||
langID == nameLocaleID)
{
buffer.position(namePtr);
buffer.get(name, 0, nameLen);
tmpName = makeString(name, nameLen, encodingID);
if (familyName == null || langID == ENGLISH_LOCALE_ID){
familyName = tmpName;
}
if (langID == nameLocaleID) {
localeFamilyName = tmpName;
}
}
/*
for (int ii=0;ii<nameLen;ii++) {
int val = (int)name[ii]&0xff;
System.err.print(Integer.toHexString(val)+ " ");
}
System.err.println();
System.err.println("familyName="+familyName +
" nameLen="+nameLen+
" langID="+langID+ " eid="+encodingID +
" str len="+familyName.length());
*/
break;
case FULL_NAME_ID:
if (fullName == null || langID == ENGLISH_LOCALE_ID ||
langID == nameLocaleID)
{
buffer.position(namePtr);
buffer.get(name, 0, nameLen);
tmpName = makeString(name, nameLen, encodingID);
if (fullName == null || langID == ENGLISH_LOCALE_ID) {
fullName = tmpName;
}
if (langID == nameLocaleID) {
localeFullName = tmpName;
}
}
break;
}
}
if (localeFamilyName == null) {
localeFamilyName = familyName;
}
if (localeFullName == null) {
localeFullName = fullName;
}
}
}
/* Return the requested name in the requested locale, for the
* MS platform ID. If the requested locale isn't found, return US
* English, if that isn't found, return null and let the caller
* figure out how to handle that.
*/
protected String lookupName(short findLocaleID, int findNameID) {
String foundName = null;
byte[] name = new byte[1024];
ByteBuffer buffer = getTableBuffer(nameTag);
if (buffer != null) {
ShortBuffer sbuffer = buffer.asShortBuffer();
sbuffer.get(); // format - not needed.
short numRecords = sbuffer.get();
/* The name table uses unsigned shorts. Many of these
* are known small values that fit in a short.
* The values that are sizes or offsets into the table could be
* greater than 32767, so read and store those as ints
*/
int stringPtr = ((int) sbuffer.get()) & 0xffff;
for (int i=0; i<numRecords; i++) {
short platformID = sbuffer.get();
if (platformID != MS_PLATFORM_ID) {
sbuffer.position(sbuffer.position()+5);
continue; // skip over this record.
}
short encodingID = sbuffer.get();
short langID = sbuffer.get();
short nameID = sbuffer.get();
int nameLen = ((int) sbuffer.get()) & 0xffff;
int namePtr = (((int) sbuffer.get()) & 0xffff) + stringPtr;
if (nameID == findNameID &&
((foundName == null && langID == ENGLISH_LOCALE_ID)
|| langID == findLocaleID)) {
buffer.position(namePtr);
buffer.get(name, 0, nameLen);
foundName = makeString(name, nameLen, encodingID);
if (langID == findLocaleID) {
return foundName;
}
}
}
}
return foundName;
}
/**
* @return number of logical fonts. Is "1" for all but TTC files
*/
public int getFontCount() {
return directoryCount;
}
protected synchronized FontScaler getScaler() {
if (scaler == null) {
scaler = FontScaler.getScaler(this, fontIndex,
supportsCJK, fileSize);
}
return scaler;
}
/* Postscript name is rarely requested. Don't waste cycles locating it
* as part of font creation, nor storage to hold it. Get it only on demand.
*/
@Override
public String getPostscriptName() {
String name = lookupName(ENGLISH_LOCALE_ID, POSTSCRIPT_NAME_ID);
if (name == null) {
return fullName;
} else {
return name;
}
}
@Override
public String getFontName(Locale locale) {
if (locale == null) {
return fullName;
} else if (locale.equals(nameLocale) && localeFullName != null) {
return localeFullName;
} else {
short localeID = getLCIDFromLocale(locale);
String name = lookupName(localeID, FULL_NAME_ID);
if (name == null) {
return fullName;
} else {
return name;
}
}
}
// Return a Microsoft LCID from the given Locale.
// Used when getting localized font data.
private static void addLCIDMapEntry(Map<String, Short> map,
String key, short value) {
map.put(key, Short.valueOf(value));
}
private static synchronized void createLCIDMap() {
if (lcidMap != null) {
return;
}
Map<String, Short> map = new HashMap
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