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	/*
	* Copyright (c) 1996, 2010, 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.awt;

	import java.awt.peer.FontPeer;
	import java.util.Locale;
	import java.util.Vector;
	import sun.font.SunFontManager;
	import sun.java2d.FontSupport;
	import java.nio.CharBuffer;
	import java.nio.ByteBuffer;

	public abstract class PlatformFont implements FontPeer {

	static {
	NativeLibLoader.loadLibraries();
	initIDs();
	}

	protected FontDescriptor[] componentFonts;
	protected char defaultChar;
	protected FontConfiguration fontConfig;

	protected FontDescriptor defaultFont;

	protected String familyName;

	private Object[] fontCache;

	// Maybe this should be a property that is set based
	// on the locale?
	protected static int FONTCACHESIZE = 256;
	protected static int FONTCACHEMASK = PlatformFont.FONTCACHESIZE - 1;
	protected static String osVersion;

	public PlatformFont(String name, int style){
	SunFontManager sfm = SunFontManager.getInstance();
	if (sfm instanceof FontSupport) {
	fontConfig = ((FontSupport)sfm).getFontConfiguration();
	}
	if (fontConfig == null) {
	return;
	}

	// map given font name to a valid logical font family name
	familyName = name.toLowerCase(Locale.ENGLISH);
	if (!FontConfiguration.isLogicalFontFamilyName(familyName)) {
	familyName = fontConfig.getFallbackFamilyName(familyName, "sansserif");
	}

	componentFonts = fontConfig.getFontDescriptors(familyName, style);

	// search default character
	//
	char missingGlyphCharacter = getMissingGlyphCharacter();

	defaultChar = '?';
	if (componentFonts.length > 0)
	defaultFont = componentFonts[0];

	for (int i = 0; i < componentFonts.length; i++){
	if (componentFonts[i].isExcluded(missingGlyphCharacter)) {
	continue;
	}

	if (componentFonts[i].encoder.canEncode(missingGlyphCharacter)) {
	defaultFont = componentFonts[i];
	defaultChar = missingGlyphCharacter;
	break;
	}
	}
	}

	/**
	* Returns the character that should be rendered when a glyph
	* is missing.
	*/
	protected abstract char getMissingGlyphCharacter();

	/**
	* make a array of CharsetString with given String.
	*/
	public CharsetString[] makeMultiCharsetString(String str){
	return makeMultiCharsetString(str.toCharArray(), 0, str.length(), true);
	}

	/**
	* make a array of CharsetString with given String.
	*/
	public CharsetString[] makeMultiCharsetString(String str, boolean allowdefault){
	return makeMultiCharsetString(str.toCharArray(), 0, str.length(), allowdefault);
	}

	/**
	* make a array of CharsetString with given char array.
	* @param str The char array to convert.
	* @param offset offset of first character of interest
	* @param len number of characters to convert
	*/
	public CharsetString[] makeMultiCharsetString(char str[], int offset, int len) {
	return makeMultiCharsetString(str, offset, len, true);
	}

	/**
	* make a array of CharsetString with given char array.
	* @param str The char array to convert.
	* @param offset offset of first character of interest
	* @param len number of characters to convert
	* @param allowDefault whether to allow the default char.
	* Setting this to true overloads the meaning of this method to
	* return non-null only if all chars can be converted.
	* @return array of CharsetString or if allowDefault is false and any
	* of the returned chars would have been converted to a default char,
	* then return null.
	* This is used to choose alternative means of displaying the text.
	*/
	public CharsetString[] makeMultiCharsetString(char str[], int offset, int len,
	boolean allowDefault) {

	if (len < 1) {
	return new CharsetString[0];
	}
	Vector mcs = null;
	char[] tmpStr = new char[len];
	char tmpChar = defaultChar;
	boolean encoded = false;

	FontDescriptor currentFont = defaultFont;


	for (int i = 0; i < componentFonts.length; i++) {
	if (componentFonts[i].isExcluded(str[offset])){
	continue;
	}

	/* Need "encoded" variable to distinguish the case when
	* the default char is the same as the encoded char.
	* The defaultChar on Linux is '?' so it is needed there.
	*/
	if (componentFonts[i].encoder.canEncode(str[offset])){
	currentFont = componentFonts[i];
	tmpChar = str[offset];
	encoded = true;
	break;
	}
	}
	if (!allowDefault && !encoded) {
	return null;
	} else {
	tmpStr[0] = tmpChar;
	}

	int lastIndex = 0;
	for (int i = 1; i < len; i++){
	char ch = str[offset + i];
	FontDescriptor fd = defaultFont;
	tmpChar = defaultChar;
	encoded = false;
	for (int j = 0; j < componentFonts.length; j++){
	if (componentFonts[j].isExcluded(ch)){
	continue;
	}

	if (componentFonts[j].encoder.canEncode(ch)){
	fd = componentFonts[j];
	tmpChar = ch;
	encoded = true;
	break;
	}
	}
	if (!allowDefault && !encoded) {
	return null;
	} else {
	tmpStr[i] = tmpChar;
	}
	if (currentFont != fd){
	if (mcs == null) {
	mcs = new Vector(3);
	}
	mcs.addElement(new CharsetString(tmpStr, lastIndex,
	i-lastIndex, currentFont));
	currentFont = fd;
	fd = defaultFont;
	lastIndex = i;
	}
	}
	CharsetString[] result;
	CharsetString cs = new CharsetString(tmpStr, lastIndex,
	len-lastIndex, currentFont);
	if (mcs == null) {
	result = new CharsetString[1];
	result[0] = cs;
	} else {
	mcs.addElement(cs);
	result = new CharsetString[mcs.size()];
	for (int i = 0; i < mcs.size(); i++){
	result[i] = (CharsetString)mcs.elementAt(i);
	}
	}
	return result;
	}

	/**
	* Is it possible that this font's metrics require the multi-font calls?
	* This might be true, for example, if the font supports kerning.
	**/
	public boolean mightHaveMultiFontMetrics() {
	return fontConfig != null;
	}

	/**
	* Specialized fast path string conversion for AWT.
	*/
	public Object[] makeConvertedMultiFontString(String str)
	{
	return makeConvertedMultiFontChars(str.toCharArray(),0,str.length());
	}

	public Object[] makeConvertedMultiFontChars(char[] data,
	int start, int len)
	{
	Object[] result = new Object[2];
	Object[] workingCache;
	byte[] convertedData = null;
	int stringIndex = start;
	int convertedDataIndex = 0;
	int resultIndex = 0;
	int cacheIndex;
	FontDescriptor currentFontDescriptor = null;
	FontDescriptor lastFontDescriptor = null;
	char currentDefaultChar;
	PlatformFontCache theChar;

	// Simple bounds check
	int end = start + len;
	if (start < 0 \|\| end > data.length) {
	throw new ArrayIndexOutOfBoundsException();
	}

	if(stringIndex >= end) {
	return null;
	}

	// coversion loop
	while(stringIndex < end)
	{
	currentDefaultChar = data[stringIndex];

	// Note that cache sizes must be a power of two!
	cacheIndex = (int)(currentDefaultChar & this.FONTCACHEMASK);

	theChar = (PlatformFontCache)getFontCache()[cacheIndex];

	// Is the unicode char we want cached?
	if(theChar == null \|\| theChar.uniChar != currentDefaultChar)
	{
	/* find a converter that can convert the current character */
	currentFontDescriptor = defaultFont;
	currentDefaultChar = defaultChar;
	char ch = (char)data[stringIndex];
	int componentCount = componentFonts.length;

	for (int j = 0; j < componentCount; j++) {
	FontDescriptor fontDescriptor = componentFonts[j];

	fontDescriptor.encoder.reset();
	//fontDescriptor.encoder.onUnmappleCharacterAction(...);

	if (fontDescriptor.isExcluded(ch)) {
	continue;
	}
	if (fontDescriptor.encoder.canEncode(ch)) {
	currentFontDescriptor = fontDescriptor;
	currentDefaultChar = ch;
	break;
	}
	}
	try {
	char[] input = new char[1];
	input[0] = currentDefaultChar;

	theChar = new PlatformFontCache();
	if (currentFontDescriptor.useUnicode()) {
	/*
	currentFontDescriptor.unicodeEncoder.encode(CharBuffer.wrap(input),
	theChar.bb,
	true);
	*/
	if (currentFontDescriptor.isLE) {
	theChar.bb.put((byte)(input[0] & 0xff));
	theChar.bb.put((byte)(input[0] >>8));
	} else {
	theChar.bb.put((byte)(input[0] >> 8));
	theChar.bb.put((byte)(input[0] & 0xff));
	}
	}
	else {
	currentFontDescriptor.encoder.encode(CharBuffer.wrap(input),
	theChar.bb,
	true);
	}
	theChar.fontDescriptor = currentFontDescriptor;
	theChar.uniChar = data[stringIndex];
	getFontCache()[cacheIndex] = theChar;
	} catch(Exception e){
	// Should never happen!
	System.err.println(e);
	e.printStackTrace();
	return null;
	}
	}

	// Check to see if we've changed fonts.
	if(lastFontDescriptor != theChar.fontDescriptor) {
	if(lastFontDescriptor != null) {
	result[resultIndex++] = lastFontDescriptor;
	result[resultIndex++] = convertedData;
	// Add the size to the converted data field.
	if(convertedData != null) {
	convertedDataIndex -= 4;
	convertedData[0] = (byte)(convertedDataIndex >> 24);
	convertedData[1] = (byte)(convertedDataIndex >> 16);
	convertedData[2] = (byte)(convertedDataIndex >> 8);
	convertedData[3] = (byte)convertedDataIndex;
	}

	if(resultIndex >= result.length) {
	Object[] newResult = new Object[result.length * 2];

	System.arraycopy(result, 0, newResult, 0,
	result.length);
	result = newResult;
	}
	}

	if (theChar.fontDescriptor.useUnicode()) {
	convertedData = new byte[(end - stringIndex + 1) *
	(int)theChar.fontDescriptor.unicodeEncoder.maxBytesPerChar()
	+ 4];
	}
	else {
	convertedData = new byte[(end - stringIndex + 1) *
	(int)theChar.fontDescriptor.encoder.maxBytesPerChar()
	+ 4];
	}

	convertedDataIndex = 4;

	lastFontDescriptor = theChar.fontDescriptor;
	}

	byte[] ba = theChar.bb.array();
	int size = theChar.bb.position();
	if(size == 1) {
	convertedData[convertedDataIndex++] = ba[0];
	}
	else if(size == 2) {
	convertedData[convertedDataIndex++] = ba[0];
	convertedData[convertedDataIndex++] = ba[1];
	} else if(size == 3) {
	convertedData[convertedDataIndex++] = ba[0];
	convertedData[convertedDataIndex++] = ba[1];
	convertedData[convertedDataIndex++] = ba[2];
	} else if(size == 4) {
	convertedData[convertedDataIndex++] = ba[0];
	convertedData[convertedDataIndex++] = ba[1];
	convertedData[convertedDataIndex++] = ba[2];
	convertedData[convertedDataIndex++] = ba[3];
	}
	stringIndex++;
	}

	result[resultIndex++] = lastFontDescriptor;
	result[resultIndex] = convertedData;

	// Add the size to the converted data field.
	if(convertedData != null) {
	convertedDataIndex -= 4;
	convertedData[0] = (byte)(convertedDataIndex >> 24);
	convertedData[1] = (byte)(convertedDataIndex >> 16);
	convertedData[2] = (byte)(convertedDataIndex >> 8);
	convertedData[3] = (byte)convertedDataIndex;
	}
	return result;
	}

	/*
	* Create fontCache on demand instead of during construction to
	* reduce overall memory consumption.
	*
	* This method is declared final so that its code can be inlined
	* by the compiler.
	*/
	protected final Object[] getFontCache() {
	// This method is not MT-safe by design. Since this is just a
	// cache anyways, it's okay if we occasionally allocate the array
	// twice or return an array which will be dereferenced and gced
	// right away.
	if (fontCache == null) {
	fontCache = new Object[this.FONTCACHESIZE];
	}

	return fontCache;
	}

	/**
	* Initialize JNI field and method IDs
	*/
	private static native void initIDs();

	class PlatformFontCache
	{
	char uniChar;
	FontDescriptor fontDescriptor;
	ByteBuffer bb = ByteBuffer.allocate(4);
	}
	}

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