/* * 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);    }}