/* * Copyright (c) 2003, 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.font; import java.awt.Font;import java.awt.font.FontRenderContext;import java.awt.geom.AffineTransform;import java.lang.ref.Reference;import java.lang.ref.SoftReference;import java.util.concurrent.ConcurrentHashMap;import java.util.Locale; public abstract class Font2D { /* Note: JRE and FONT_CONFIG ranks are identical. I don't know of a reason * to distingish these. Possibly if a user adds fonts to the JRE font * directory that are the same font as the ones specified in the font * configuration but that is more likely to be the legitimate intention * than a problem. One reason why these should be the same is that on * Linux the JRE fonts ARE the font configuration fonts, and although I * believe all are assigned FONT_CONFIG rank, it is conceivable that if * this were not so, that some JRE font would not be allowed to joint the * family of its siblings which were assigned FONT_CONFIG rank. Giving * them the same rank is the easy solution for now at least. */ public static final int FONT_CONFIG_RANK = 2; public static final int JRE_RANK = 2; public static final int TTF_RANK = 3; public static final int TYPE1_RANK = 4; public static final int NATIVE_RANK = 5; public static final int UNKNOWN_RANK = 6; public static final int DEFAULT_RANK = 4; private static final String[] boldNames = { "bold", "demibold", "demi-bold", "demi bold", "negreta", "demi", }; private static final String[] italicNames = { "italic", "cursiva", "oblique", "inclined", }; private static final String[] boldItalicNames = { "bolditalic", "bold-italic", "bold italic", "boldoblique", "bold-oblique", "bold oblique", "demibold italic", "negreta cursiva","demi oblique", }; private static final FontRenderContext DEFAULT_FRC = new FontRenderContext(null, false, false); public Font2DHandle handle; protected String familyName; /* Family font name (english) */ protected String fullName; /* Full font name (english) */ protected int style = Font.PLAIN; protected FontFamily family; protected int fontRank = DEFAULT_RANK; /* * A mapper can be independent of the strike. * Perhaps the reference to the mapper ought to be held on the * scaler, as it may be implemented via scaler functionality anyway * and so the mapper would be useless if its native portion was * freed when the scaler was GC'd. */ protected CharToGlyphMapper mapper; /* * The strike cache is maintained per "Font2D" as that is the * principal object by which you look up fonts. * It means more Hashmaps, but look ups can be quicker because * the map will have fewer entries, and there's no need to try to * make the Font2D part of the key. */ protected ConcurrentHashMap<FontStrikeDesc, Reference> strikeCache = new ConcurrentHashMap<FontStrikeDesc, Reference>(); /* Store the last Strike in a Reference object. * Similarly to the strike that was stored on a C++ font object, * this is an optimisation which helps if multiple clients (ie * typically SunGraphics2D instances) are using the same font, then * as may be typical of many UIs, they are probably using it in the * same style, so it can be a win to first quickly check if the last * strike obtained from this Font2D satifies the needs of the next * client too. * This pre-supposes that a FontStrike is a shareable object, which * it should. */ protected Reference lastFontStrike = new SoftReference(null); /* * POSSIBLE OPTIMISATION: * Array of length 1024 elements of 64 bits indicating if a font * contains these. This kind of information can be shared between * all point sizes. * if corresponding bit in knownBitmaskMap is set then canDisplayBitmaskMap * is valid. This is 16Kbytes of data per composite font style. * What about UTF-32 and surrogates? * REMIND: This is too much storage. Probably can only cache this * information for latin range, although possibly OK to store all * for just the "logical" fonts. * Or instead store arrays of subranges of 1024 bits (128 bytes) in * the range below surrogate pairs. */// protected long[] knownBitmaskMap;// protected long[] canDisplayBitmaskMap; /* Returns the "real" style of this Font2D. Eg the font face * Lucida Sans Bold" has a real style of Font.BOLD, even though * it may be able to used to simulate bold italic */ public int getStyle() { return style; } protected void setStyle() { String fName = fullName.toLowerCase(); for (int i=0; i < boldItalicNames.length; i++) { if (fName.indexOf(boldItalicNames[i]) != -1) { style = Font.BOLD|Font.ITALIC; return; } } for (int i=0; i < italicNames.length; i++) { if (fName.indexOf(italicNames[i]) != -1) { style = Font.ITALIC; return; } } for (int i=0; i < boldNames.length; i++) { if (fName.indexOf(boldNames[i]) != -1 ) { style = Font.BOLD; return; } } } int getRank() { return fontRank; } void setRank(int rank) { fontRank = rank; } abstract CharToGlyphMapper getMapper(); /* This isn't very efficient but its infrequently used. * StandardGlyphVector uses it when the client assigns the glyph codes. * These may not be valid. This validates them substituting the missing * glyph elsewhere. */ protected int getValidatedGlyphCode(int glyphCode) { if (glyphCode < 0 || glyphCode >= getMapper().getNumGlyphs()) { glyphCode = getMapper().getMissingGlyphCode(); } return glyphCode; } /* * Creates an appropriate strike for the Font2D subclass */ abstract FontStrike createStrike(FontStrikeDesc desc); /* this may be useful for APIs like canDisplay where the answer * is dependent on the font and its scaler, but not the strike. * If no strike has ever been returned, then create a one that matches * this font with the default FRC. It will become the lastStrike and * there's a good chance that the next call will be to get exactly that * strike. */ public FontStrike getStrike(Font font) { FontStrike strike = (FontStrike)lastFontStrike.get(); if (strike != null) { return strike; } else { return getStrike(font, DEFAULT_FRC); } } /* SunGraphics2D has font, tx, aa and fm. From this info * can get a Strike object from the cache, creating it if necessary. * This code is designed for multi-threaded access. * For that reason it creates a local FontStrikeDesc rather than filling * in a shared one. Up to two AffineTransforms and one FontStrikeDesc will * be created by every lookup. This appears to perform more than * adequately. But it may make sense to expose FontStrikeDesc * as a parameter so a caller can use its own. * In such a case if a FontStrikeDesc is stored as a key then * we would need to use a private copy. * * Note that this code doesn't prevent two threads from creating * two different FontStrike instances and having one of the threads * overwrite the other in the map. This is likely to be a rare * occurrence and the only consequence is that these callers will have * different instances of the strike, and there'd be some duplication of * population of the strikes. However since users of these strikes are * transient, then the one that was overwritten would soon be freed. * If there is any problem then a small synchronized block would be * required with its attendant consequences for MP scaleability. */ public FontStrike getStrike(Font font, AffineTransform devTx, int aa, int fm) { /* Create the descriptor which is used to identify a strike * in the strike cache/map. A strike is fully described by * the attributes of this descriptor. */ /* REMIND: generating garbage and doing computation here in order * to include pt size in the tx just for a lookup! Figure out a * better way. */ double ptSize = font.getSize2D(); AffineTransform glyphTx = (AffineTransform)devTx.clone(); glyphTx.scale(ptSize, ptSize); if (font.isTransformed()) { glyphTx.concatenate(font.getTransform()); } if (glyphTx.getTranslateX() != 0 || glyphTx.getTranslateY() != 0) { glyphTx.setTransform(glyphTx.getScaleX(), glyphTx.getShearY(), glyphTx.getShearX(), glyphTx.getScaleY(), 0.0, 0.0); } FontStrikeDesc desc = new FontStrikeDesc(devTx, glyphTx, font.getStyle(), aa, fm); return getStrike(desc, false); } public FontStrike getStrike(Font font, AffineTransform devTx, AffineTransform glyphTx, int aa, int fm) { /* Create the descriptor which is used to identify a strike * in the strike cache/map. A strike is fully described by * the attributes of this descriptor. */ FontStrikeDesc desc = new FontStrikeDesc(devTx, glyphTx, font.getStyle(), aa, fm); return getStrike(desc, false); } public FontStrike getStrike(Font font, FontRenderContext frc) { AffineTransform at = frc.getTransform(); double ptSize = font.getSize2D(); at.scale(ptSize, ptSize); if (font.isTransformed()) { at.concatenate(font.getTransform()); if (at.getTranslateX() != 0 || at.getTranslateY() != 0) { at.setTransform(at.getScaleX(), at.getShearY(), at.getShearX(), at.getScaleY(), 0.0, 0.0); } } int aa = FontStrikeDesc.getAAHintIntVal(this, font, frc); int fm = FontStrikeDesc.getFMHintIntVal(frc.getFractionalMetricsHint()); FontStrikeDesc desc = new FontStrikeDesc(frc.getTransform(), at, font.getStyle(), aa, fm); return getStrike(desc, false); } FontStrike getStrike(FontStrikeDesc desc) { return getStrike(desc, true); } private FontStrike getStrike(FontStrikeDesc desc, boolean copy) { /* Before looking in the map, see if the descriptor matches the * last strike returned from this Font2D. This should often be a win * since its common for the same font, in the same size to be * used frequently, for example in many parts of a UI. * * If its not the same then we use the descriptor to locate a * Reference to the strike. If it exists and points to a strike, * then we update the last strike to refer to that and return it. * * If the key isn't in the map, or its reference object has been * collected, then we create a new strike, put it in the map and * set it to be the last strike. */ FontStrike strike = (FontStrike)lastFontStrike.get(); if (strike != null && desc.equals(strike.desc)) { //strike.lastlookupTime = System.currentTimeMillis(); return strike; } else { Reference strikeRef = strikeCache.get(desc); if (strikeRef != null) { strike = (FontStrike)strikeRef.get(); if (strike != null) { //strike.lastlookupTime = System.currentTimeMillis(); lastFontStrike = new SoftReference(strike); StrikeCache.refStrike(strike); return strike; } } /* When we create a new FontStrike instance, we *must* * ask the StrikeCache for a reference. We must then ensure * this reference remains reachable, by storing it in the * Font2D's strikeCache map. * So long as the Reference is there (reachable) then if the * reference is cleared, it will be enqueued for disposal. * If for some reason we explicitly remove this reference, it * must only be done when holding a strong reference to the * referent (the FontStrike), or if the reference is cleared, * then we must explicitly "dispose" of the native resources. * The only place this currently happens is in this same method, * where we find a cleared reference and need to overwrite it * here with a new reference. * Clearing the whilst holding a strong reference, should only * be done if the */ if (copy) { desc = new FontStrikeDesc(desc); } strike = createStrike(desc); //StrikeCache.addStrike(); /* If we are creating many strikes on this font which * involve non-quadrant rotations, or more general * transforms which include shears, then force the use * of weak references rather than soft references. * This means that it won't live much beyond the next GC, * which is what we want for what is likely a transient strike. */ int txType = desc.glyphTx.getType(); if (txType == AffineTransform.TYPE_GENERAL_TRANSFORM || (txType & AffineTransform.TYPE_GENERAL_ROTATION) != 0 && strikeCache.size() > 10) { strikeRef = StrikeCache.getStrikeRef(strike, true); } else { strikeRef = StrikeCache.getStrikeRef(strike); } strikeCache.put(desc, strikeRef); //strike.lastlookupTime = System.currentTimeMillis(); lastFontStrike = new SoftReference(strike); StrikeCache.refStrike(strike); return strike; } } void removeFromCache(FontStrikeDesc desc) { Reference ref = strikeCache.get(desc); if (ref != null) { Object o = ref.get(); if (o == null) { strikeCache.remove(desc); } } } /** * The length of the metrics array must be >= 8. This method will * store the following elements in that array before returning: * metrics[0]: ascent * metrics[1]: descent * metrics[2]: leading * metrics[3]: max advance * metrics[4]: strikethrough offset * metrics[5]: strikethrough thickness * metrics[6]: underline offset * metrics[7]: underline thickness */ public void getFontMetrics(Font font, AffineTransform at, Object aaHint, Object fmHint, float metrics[]) { /* This is called in just one place in Font with "at" == identity. * Perhaps this can be eliminated. */ int aa = FontStrikeDesc.getAAHintIntVal(aaHint, this, font.getSize()); int fm = FontStrikeDesc.getFMHintIntVal(fmHint); FontStrike strike = getStrike(font, at, aa, fm); StrikeMetrics strikeMetrics = strike.getFontMetrics(); metrics[0] = strikeMetrics.getAscent(); metrics[1] = strikeMetrics.getDescent(); metrics[2] = strikeMetrics.getLeading(); metrics[3] = strikeMetrics.getMaxAdvance(); getStyleMetrics(font.getSize2D(), metrics, 4); } /** * The length of the metrics array must be >= offset+4, and offset must be * >= 0. Typically offset is 4. This method will * store the following elements in that array before returning: * metrics[off+0]: strikethrough offset * metrics[off+1]: strikethrough thickness * metrics[off+2]: underline offset * metrics[off+3]: underline thickness * * Note that this implementation simply returns default values; * subclasses can override this method to provide more accurate values. */ public void getStyleMetrics(float pointSize, float[] metrics, int offset) { metrics[offset] = -metrics[0] / 2.5f; metrics[offset+1] = pointSize / 12; metrics[offset+2] = metrics[offset+1] / 1.5f; metrics[offset+3] = metrics[offset+1]; } /** * The length of the metrics array must be >= 4. This method will * store the following elements in that array before returning: * metrics[0]: ascent * metrics[1]: descent * metrics[2]: leading * metrics[3]: max advance */ public void getFontMetrics(Font font, FontRenderContext frc, float metrics[]) { StrikeMetrics strikeMetrics = getStrike(font, frc).getFontMetrics(); metrics[0] = strikeMetrics.getAscent(); metrics[1] = strikeMetrics.getDescent(); metrics[2] = strikeMetrics.getLeading(); metrics[3] = strikeMetrics.getMaxAdvance(); } /* Currently the layout code calls this. May be better for layout code * to check the font class before attempting to run, rather than needing * to promote this method up from TrueTypeFont */ byte[] getTableBytes(int tag) { return null; } /* for layout code */ protected long getUnitsPerEm() { return 2048; } boolean supportsEncoding(String encoding) { return false; } public boolean canDoStyle(int style) { return (style == this.style); } /* * All the important subclasses override this which is principally for * the TrueType 'gasp' table. */ public boolean useAAForPtSize(int ptsize) { return true; } public boolean hasSupplementaryChars() { return false; } /* The following methods implement public methods on java.awt.Font */ public String getPostscriptName() { return fullName; } public String getFontName(Locale l) { return fullName; } public String getFamilyName(Locale l) { return familyName; } public int getNumGlyphs() { return getMapper().getNumGlyphs(); } public int charToGlyph(int wchar) { return getMapper().charToGlyph(wchar); } public int getMissingGlyphCode() { return getMapper().getMissingGlyphCode();Lines 1–500 of 534. 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/* * Copyright (c) 2003, 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.font; import java.awt.Font; import java.awt.font.FontRenderContext; import java.awt.geom.AffineTransform; import java.lang.ref.Reference; import java.lang.ref.SoftReference; import java.util.concurrent.ConcurrentHashMap; import java.util.Locale; public abstract class Font2D { /* Note: JRE and FONT_CONFIG ranks are identical. I don't know of a reason * to distingish these. Possibly if a user adds fonts to the JRE font * directory that are the same font as the ones specified in the font * configuration but that is more likely to be the legitimate intention * than a problem. One reason why these should be the same is that on * Linux the JRE fonts ARE the font configuration fonts, and although I * believe all are assigned FONT_CONFIG rank, it is conceivable that if * this were not so, that some JRE font would not be allowed to joint the * family of its siblings which were assigned FONT_CONFIG rank. Giving * them the same rank is the easy solution for now at least. */ public static final int FONT_CONFIG_RANK = 2; public static final int JRE_RANK = 2; public static final int TTF_RANK = 3; public static final int TYPE1_RANK = 4; public static final int NATIVE_RANK = 5; public static final int UNKNOWN_RANK = 6; public static final int DEFAULT_RANK = 4; private static final String[] boldNames = { "bold", "demibold", "demi-bold", "demi bold", "negreta", "demi", }; private static final String[] italicNames = { "italic", "cursiva", "oblique", "inclined", }; private static final String[] boldItalicNames = { "bolditalic", "bold-italic", "bold italic", "boldoblique", "bold-oblique", "bold oblique", "demibold italic", "negreta cursiva","demi oblique", }; private static final FontRenderContext DEFAULT_FRC = new FontRenderContext(null, false, false); public Font2DHandle handle; protected String familyName; /* Family font name (english) */ protected String fullName; /* Full font name (english) */ protected int style = Font.PLAIN; protected FontFamily family; protected int fontRank = DEFAULT_RANK; /* * A mapper can be independent of the strike. * Perhaps the reference to the mapper ought to be held on the * scaler, as it may be implemented via scaler functionality anyway * and so the mapper would be useless if its native portion was * freed when the scaler was GC'd. */ protected CharToGlyphMapper mapper; /* * The strike cache is maintained per "Font2D" as that is the * principal object by which you look up fonts. * It means more Hashmaps, but look ups can be quicker because * the map will have fewer entries, and there's no need to try to * make the Font2D part of the key. */ protected ConcurrentHashMap<FontStrikeDesc, Reference> strikeCache = new ConcurrentHashMap<FontStrikeDesc, Reference>(); /* Store the last Strike in a Reference object. * Similarly to the strike that was stored on a C++ font object, * this is an optimisation which helps if multiple clients (ie * typically SunGraphics2D instances) are using the same font, then * as may be typical of many UIs, they are probably using it in the * same style, so it can be a win to first quickly check if the last * strike obtained from this Font2D satifies the needs of the next * client too. * This pre-supposes that a FontStrike is a shareable object, which * it should. */ protected Reference lastFontStrike = new SoftReference(null); /* * POSSIBLE OPTIMISATION: * Array of length 1024 elements of 64 bits indicating if a font * contains these. This kind of information can be shared between * all point sizes. * if corresponding bit in knownBitmaskMap is set then canDisplayBitmaskMap * is valid. This is 16Kbytes of data per composite font style. * What about UTF-32 and surrogates? * REMIND: This is too much storage. Probably can only cache this * information for latin range, although possibly OK to store all * for just the "logical" fonts. * Or instead store arrays of subranges of 1024 bits (128 bytes) in * the range below surrogate pairs. */ // protected long[] knownBitmaskMap; // protected long[] canDisplayBitmaskMap; /* Returns the "real" style of this Font2D. Eg the font face * Lucida Sans Bold" has a real style of Font.BOLD, even though * it may be able to used to simulate bold italic */ public int getStyle() { return style; } protected void setStyle() { String fName = fullName.toLowerCase(); for (int i=0; i < boldItalicNames.length; i++) { if (fName.indexOf(boldItalicNames[i]) != -1) { style = Font.BOLD|Font.ITALIC; return; } } for (int i=0; i < italicNames.length; i++) { if (fName.indexOf(italicNames[i]) != -1) { style = Font.ITALIC; return; } } for (int i=0; i < boldNames.length; i++) { if (fName.indexOf(boldNames[i]) != -1 ) { style = Font.BOLD; return; } } } int getRank() { return fontRank; } void setRank(int rank) { fontRank = rank; } abstract CharToGlyphMapper getMapper(); /* This isn't very efficient but its infrequently used. * StandardGlyphVector uses it when the client assigns the glyph codes. * These may not be valid. This validates them substituting the missing * glyph elsewhere. */ protected int getValidatedGlyphCode(int glyphCode) { if (glyphCode < 0 || glyphCode >= getMapper().getNumGlyphs()) { glyphCode = getMapper().getMissingGlyphCode(); } return glyphCode; } /* * Creates an appropriate strike for the Font2D subclass */ abstract FontStrike createStrike(FontStrikeDesc desc); /* this may be useful for APIs like canDisplay where the answer * is dependent on the font and its scaler, but not the strike. * If no strike has ever been returned, then create a one that matches * this font with the default FRC. It will become the lastStrike and * there's a good chance that the next call will be to get exactly that * strike. */ public FontStrike getStrike(Font font) { FontStrike strike = (FontStrike)lastFontStrike.get(); if (strike != null) { return strike; } else { return getStrike(font, DEFAULT_FRC); } } /* SunGraphics2D has font, tx, aa and fm. From this info * can get a Strike object from the cache, creating it if necessary. * This code is designed for multi-threaded access. * For that reason it creates a local FontStrikeDesc rather than filling * in a shared one. Up to two AffineTransforms and one FontStrikeDesc will * be created by every lookup. This appears to perform more than * adequately. But it may make sense to expose FontStrikeDesc * as a parameter so a caller can use its own. * In such a case if a FontStrikeDesc is stored as a key then * we would need to use a private copy. * * Note that this code doesn't prevent two threads from creating * two different FontStrike instances and having one of the threads * overwrite the other in the map. This is likely to be a rare * occurrence and the only consequence is that these callers will have * different instances of the strike, and there'd be some duplication of * population of the strikes. However since users of these strikes are * transient, then the one that was overwritten would soon be freed. * If there is any problem then a small synchronized block would be * required with its attendant consequences for MP scaleability. */ public FontStrike getStrike(Font font, AffineTransform devTx, int aa, int fm) { /* Create the descriptor which is used to identify a strike * in the strike cache/map. A strike is fully described by * the attributes of this descriptor. */ /* REMIND: generating garbage and doing computation here in order * to include pt size in the tx just for a lookup! Figure out a * better way. */ double ptSize = font.getSize2D(); AffineTransform glyphTx = (AffineTransform)devTx.clone(); glyphTx.scale(ptSize, ptSize); if (font.isTransformed()) { glyphTx.concatenate(font.getTransform()); } if (glyphTx.getTranslateX() != 0 || glyphTx.getTranslateY() != 0) { glyphTx.setTransform(glyphTx.getScaleX(), glyphTx.getShearY(), glyphTx.getShearX(), glyphTx.getScaleY(), 0.0, 0.0); } FontStrikeDesc desc = new FontStrikeDesc(devTx, glyphTx, font.getStyle(), aa, fm); return getStrike(desc, false); } public FontStrike getStrike(Font font, AffineTransform devTx, AffineTransform glyphTx, int aa, int fm) { /* Create the descriptor which is used to identify a strike * in the strike cache/map. A strike is fully described by * the attributes of this descriptor. */ FontStrikeDesc desc = new FontStrikeDesc(devTx, glyphTx, font.getStyle(), aa, fm); return getStrike(desc, false); } public FontStrike getStrike(Font font, FontRenderContext frc) { AffineTransform at = frc.getTransform(); double ptSize = font.getSize2D(); at.scale(ptSize, ptSize); if (font.isTransformed()) { at.concatenate(font.getTransform()); if (at.getTranslateX() != 0 || at.getTranslateY() != 0) { at.setTransform(at.getScaleX(), at.getShearY(), at.getShearX(), at.getScaleY(), 0.0, 0.0); } } int aa = FontStrikeDesc.getAAHintIntVal(this, font, frc); int fm = FontStrikeDesc.getFMHintIntVal(frc.getFractionalMetricsHint()); FontStrikeDesc desc = new FontStrikeDesc(frc.getTransform(), at, font.getStyle(), aa, fm); return getStrike(desc, false); } FontStrike getStrike(FontStrikeDesc desc) { return getStrike(desc, true); } private FontStrike getStrike(FontStrikeDesc desc, boolean copy) { /* Before looking in the map, see if the descriptor matches the * last strike returned from this Font2D. This should often be a win * since its common for the same font, in the same size to be * used frequently, for example in many parts of a UI. * * If its not the same then we use the descriptor to locate a * Reference to the strike. If it exists and points to a strike, * then we update the last strike to refer to that and return it. * * If the key isn't in the map, or its reference object has been * collected, then we create a new strike, put it in the map and * set it to be the last strike. */ FontStrike strike = (FontStrike)lastFontStrike.get(); if (strike != null && desc.equals(strike.desc)) { //strike.lastlookupTime = System.currentTimeMillis(); return strike; } else { Reference strikeRef = strikeCache.get(desc); if (strikeRef != null) { strike = (FontStrike)strikeRef.get(); if (strike != null) { //strike.lastlookupTime = System.currentTimeMillis(); lastFontStrike = new SoftReference(strike); StrikeCache.refStrike(strike); return strike; } } /* When we create a new FontStrike instance, we *must* * ask the StrikeCache for a reference. We must then ensure * this reference remains reachable, by storing it in the * Font2D's strikeCache map. * So long as the Reference is there (reachable) then if the * reference is cleared, it will be enqueued for disposal. * If for some reason we explicitly remove this reference, it * must only be done when holding a strong reference to the * referent (the FontStrike), or if the reference is cleared, * then we must explicitly "dispose" of the native resources. * The only place this currently happens is in this same method, * where we find a cleared reference and need to overwrite it * here with a new reference. * Clearing the whilst holding a strong reference, should only * be done if the */ if (copy) { desc = new FontStrikeDesc(desc); } strike = createStrike(desc); //StrikeCache.addStrike(); /* If we are creating many strikes on this font which * involve non-quadrant rotations, or more general * transforms which include shears, then force the use * of weak references rather than soft references. * This means that it won't live much beyond the next GC, * which is what we want for what is likely a transient strike. */ int txType = desc.glyphTx.getType(); if (txType == AffineTransform.TYPE_GENERAL_TRANSFORM || (txType & AffineTransform.TYPE_GENERAL_ROTATION) != 0 && strikeCache.size() > 10) { strikeRef = StrikeCache.getStrikeRef(strike, true); } else { strikeRef = StrikeCache.getStrikeRef(strike); } strikeCache.put(desc, strikeRef); //strike.lastlookupTime = System.currentTimeMillis(); lastFontStrike = new SoftReference(strike); StrikeCache.refStrike(strike); return strike; } } void removeFromCache(FontStrikeDesc desc) { Reference ref = strikeCache.get(desc); if (ref != null) { Object o = ref.get(); if (o == null) { strikeCache.remove(desc); } } } /** * The length of the metrics array must be >= 8. This method will * store the following elements in that array before returning: * metrics[0]: ascent * metrics[1]: descent * metrics[2]: leading * metrics[3]: max advance * metrics[4]: strikethrough offset * metrics[5]: strikethrough thickness * metrics[6]: underline offset * metrics[7]: underline thickness */ public void getFontMetrics(Font font, AffineTransform at, Object aaHint, Object fmHint, float metrics[]) { /* This is called in just one place in Font with "at" == identity. * Perhaps this can be eliminated. */ int aa = FontStrikeDesc.getAAHintIntVal(aaHint, this, font.getSize()); int fm = FontStrikeDesc.getFMHintIntVal(fmHint); FontStrike strike = getStrike(font, at, aa, fm); StrikeMetrics strikeMetrics = strike.getFontMetrics(); metrics[0] = strikeMetrics.getAscent(); metrics[1] = strikeMetrics.getDescent(); metrics[2] = strikeMetrics.getLeading(); metrics[3] = strikeMetrics.getMaxAdvance(); getStyleMetrics(font.getSize2D(), metrics, 4); } /** * The length of the metrics array must be >= offset+4, and offset must be * >= 0. Typically offset is 4. This method will * store the following elements in that array before returning: * metrics[off+0]: strikethrough offset * metrics[off+1]: strikethrough thickness * metrics[off+2]: underline offset * metrics[off+3]: underline thickness * * Note that this implementation simply returns default values; * subclasses can override this method to provide more accurate values. */ public void getStyleMetrics(float pointSize, float[] metrics, int offset) { metrics[offset] = -metrics[0] / 2.5f; metrics[offset+1] = pointSize / 12; metrics[offset+2] = metrics[offset+1] / 1.5f; metrics[offset+3] = metrics[offset+1]; } /** * The length of the metrics array must be >= 4. This method will * store the following elements in that array before returning: * metrics[0]: ascent * metrics[1]: descent * metrics[2]: leading * metrics[3]: max advance */ public void getFontMetrics(Font font, FontRenderContext frc, float metrics[]) { StrikeMetrics strikeMetrics = getStrike(font, frc).getFontMetrics(); metrics[0] = strikeMetrics.getAscent(); metrics[1] = strikeMetrics.getDescent(); metrics[2] = strikeMetrics.getLeading(); metrics[3] = strikeMetrics.getMaxAdvance(); } /* Currently the layout code calls this. May be better for layout code * to check the font class before attempting to run, rather than needing * to promote this method up from TrueTypeFont */ byte[] getTableBytes(int tag) { return null; } /* for layout code */ protected long getUnitsPerEm() { return 2048; } boolean supportsEncoding(String encoding) { return false; } public boolean canDoStyle(int style) { return (style == this.style); } /* * All the important subclasses override this which is principally for * the TrueType 'gasp' table. */ public boolean useAAForPtSize(int ptsize) { return true; } public boolean hasSupplementaryChars() { return false; } /* The following methods implement public methods on java.awt.Font */ public String getPostscriptName() { return fullName; } public String getFontName(Locale l) { return fullName; } public String getFamilyName(Locale l) { return familyName; } public int getNumGlyphs() { return getMapper().getNumGlyphs(); } public int charToGlyph(int wchar) { return getMapper().charToGlyph(wchar); } public int getMissingGlyphCode() { return getMapper().getMissingGlyphCode();