/* |
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* Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.font; |
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import java.nio.ByteBuffer; |
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import java.util.Locale; |
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public class TrueTypeGlyphMapper extends CharToGlyphMapper { |
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static final char REVERSE_SOLIDUS = 0x005c; // the backslash char. |
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static final char JA_YEN = 0x00a5; |
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static final char JA_FULLWIDTH_TILDE_CHAR = 0xff5e; |
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static final char JA_WAVE_DASH_CHAR = 0x301c; |
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/* if running on Solaris and default Locale is ja_JP then |
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* we map need to remap reverse solidus (backslash) to Yen as |
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* apparently expected there. |
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*/ |
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static final boolean isJAlocale = Locale.JAPAN.equals(Locale.getDefault()); |
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private final boolean needsJAremapping; |
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private boolean remapJAWaveDash; |
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TrueTypeFont font; |
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CMap cmap; |
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int numGlyphs; |
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public TrueTypeGlyphMapper(TrueTypeFont font) { |
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this.font = font; |
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try { |
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cmap = CMap.initialize(font); |
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} catch (Exception e) { |
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cmap = null; |
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} |
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if (cmap == null) { |
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handleBadCMAP(); |
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} |
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missingGlyph = 0; /* standard for TrueType fonts */ |
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ByteBuffer buffer = font.getTableBuffer(TrueTypeFont.maxpTag); |
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if (buffer != null && buffer.capacity() >= 6) { |
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numGlyphs = buffer.getChar(4); // offset 4 bytes in MAXP table. |
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} else { |
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handleBadCMAP(); |
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} |
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if (FontUtilities.isSolaris && isJAlocale && font.supportsJA()) { |
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needsJAremapping = true; |
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if (FontUtilities.isSolaris8 && |
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getGlyphFromCMAP(JA_WAVE_DASH_CHAR) == missingGlyph) { |
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remapJAWaveDash = true; |
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} |
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} else { |
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needsJAremapping = false; |
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} |
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} |
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public int getNumGlyphs() { |
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return numGlyphs; |
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} |
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private char getGlyphFromCMAP(int charCode) { |
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try { |
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char glyphCode = cmap.getGlyph(charCode); |
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if (glyphCode < numGlyphs || |
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glyphCode >= FileFontStrike.INVISIBLE_GLYPHS) { |
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return glyphCode; |
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} else { |
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if (FontUtilities.isLogging()) { |
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FontUtilities.getLogger().warning |
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(font + " out of range glyph id=" + |
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Integer.toHexString((int)glyphCode) + |
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" for char " + Integer.toHexString(charCode)); |
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} |
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return (char)missingGlyph; |
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} |
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} catch(Exception e) { |
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handleBadCMAP(); |
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return (char) missingGlyph; |
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} |
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} |
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private void handleBadCMAP() { |
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if (FontUtilities.isLogging()) { |
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FontUtilities.getLogger().severe("Null Cmap for " + font + |
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"substituting for this font"); |
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} |
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SunFontManager.getInstance().deRegisterBadFont(font); |
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/* The next line is not really a solution, but might |
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* reduce the exceptions until references to this font2D |
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* are gone. |
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*/ |
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cmap = CMap.theNullCmap; |
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} |
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private final char remapJAChar(char unicode) { |
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switch (unicode) { |
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case REVERSE_SOLIDUS: |
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return JA_YEN; |
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/* This is a workaround for bug 4533422. |
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* Japanese wave dash missing from Solaris JA TrueType fonts. |
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*/ |
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case JA_WAVE_DASH_CHAR: |
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if (remapJAWaveDash) { |
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return JA_FULLWIDTH_TILDE_CHAR; |
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} |
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default: return unicode; |
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} |
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} |
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private final int remapJAIntChar(int unicode) { |
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switch (unicode) { |
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case REVERSE_SOLIDUS: |
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return JA_YEN; |
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/* This is a workaround for bug 4533422. |
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* Japanese wave dash missing from Solaris JA TrueType fonts. |
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*/ |
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case JA_WAVE_DASH_CHAR: |
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if (remapJAWaveDash) { |
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return JA_FULLWIDTH_TILDE_CHAR; |
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} |
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default: return unicode; |
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} |
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} |
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public int charToGlyph(char unicode) { |
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if (needsJAremapping) { |
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unicode = remapJAChar(unicode); |
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} |
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int glyph = getGlyphFromCMAP(unicode); |
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if (font.checkUseNatives() && glyph < font.glyphToCharMap.length) { |
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font.glyphToCharMap[glyph] = unicode; |
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} |
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return glyph; |
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} |
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public int charToGlyph(int unicode) { |
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if (needsJAremapping) { |
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unicode = remapJAIntChar(unicode); |
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} |
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int glyph = getGlyphFromCMAP(unicode); |
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if (font.checkUseNatives() && glyph < font.glyphToCharMap.length) { |
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font.glyphToCharMap[glyph] = (char)unicode; |
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} |
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return glyph; |
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} |
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public void charsToGlyphs(int count, int[] unicodes, int[] glyphs) { |
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for (int i=0;i<count;i++) { |
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if (needsJAremapping) { |
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glyphs[i] = getGlyphFromCMAP(remapJAIntChar(unicodes[i])); |
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} else { |
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glyphs[i] = getGlyphFromCMAP(unicodes[i]); |
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} |
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if (font.checkUseNatives() && |
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glyphs[i] < font.glyphToCharMap.length) { |
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font.glyphToCharMap[glyphs[i]] = (char)unicodes[i]; |
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} |
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} |
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} |
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public void charsToGlyphs(int count, char[] unicodes, int[] glyphs) { |
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for (int i=0; i<count; i++) { |
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int code; |
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if (needsJAremapping) { |
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code = remapJAChar(unicodes[i]); |
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} else { |
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code = unicodes[i]; // char is unsigned. |
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} |
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if (code >= HI_SURROGATE_START && |
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code <= HI_SURROGATE_END && i < count - 1) { |
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char low = unicodes[i + 1]; |
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if (low >= LO_SURROGATE_START && |
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low <= LO_SURROGATE_END) { |
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code = (code - HI_SURROGATE_START) * |
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0x400 + low - LO_SURROGATE_START + 0x10000; |
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glyphs[i] = getGlyphFromCMAP(code); |
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i += 1; // Empty glyph slot after surrogate |
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glyphs[i] = INVISIBLE_GLYPH_ID; |
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continue; |
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} |
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} |
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glyphs[i] = getGlyphFromCMAP(code); |
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if (font.checkUseNatives() && |
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glyphs[i] < font.glyphToCharMap.length) { |
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font.glyphToCharMap[glyphs[i]] = (char)code; |
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} |
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} |
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} |
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/* This variant checks if shaping is needed and immediately |
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* returns true if it does. A caller of this method should be expecting |
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* to check the return type because it needs to know how to handle |
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* the character data for display. |
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*/ |
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public boolean charsToGlyphsNS(int count, char[] unicodes, int[] glyphs) { |
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for (int i=0; i<count; i++) { |
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int code; |
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if (needsJAremapping) { |
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code = remapJAChar(unicodes[i]); |
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} else { |
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code = unicodes[i]; // char is unsigned. |
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} |
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if (code >= HI_SURROGATE_START && |
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code <= HI_SURROGATE_END && i < count - 1) { |
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char low = unicodes[i + 1]; |
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if (low >= LO_SURROGATE_START && |
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low <= LO_SURROGATE_END) { |
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code = (code - HI_SURROGATE_START) * |
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0x400 + low - LO_SURROGATE_START + 0x10000; |
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glyphs[i + 1] = INVISIBLE_GLYPH_ID; |
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} |
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} |
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glyphs[i] = getGlyphFromCMAP(code); |
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if (font.checkUseNatives() && |
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glyphs[i] < font.glyphToCharMap.length) { |
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font.glyphToCharMap[glyphs[i]] = (char)code; |
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} |
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if (code < FontUtilities.MIN_LAYOUT_CHARCODE) { |
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continue; |
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} |
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else if (FontUtilities.isComplexCharCode(code)) { |
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return true; |
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} |
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else if (code >= 0x10000) { |
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i += 1; // Empty glyph slot after surrogate |
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continue; |
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} |
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} |
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return false; |
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} |
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/* A pretty good heuristic is that the cmap we are using |
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* supports 32 bit character codes. |
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*/ |
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boolean hasSupplementaryChars() { |
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return |
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cmap instanceof CMap.CMapFormat8 || |
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cmap instanceof CMap.CMapFormat10 || |
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cmap instanceof CMap.CMapFormat12; |
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} |
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} |