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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/java/awt/font/OpenTypeFontPeer.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/java/awt/font/OpenTypeFontPeer.java | 565 |
1 files changed, 565 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/awt/font/OpenTypeFontPeer.java b/gcc-4.4.3/libjava/classpath/gnu/java/awt/font/OpenTypeFontPeer.java new file mode 100644 index 000000000..e8124528e --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/java/awt/font/OpenTypeFontPeer.java @@ -0,0 +1,565 @@ +/* XFontPeer2.java -- A Java based TTF font peer for X + Copyright (C) 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt.font; + + +import gnu.java.awt.peer.ClasspathFontPeer; +import gnu.java.lang.CPStringBuilder; + +import java.awt.Font; +import java.awt.FontMetrics; +import java.awt.font.FontRenderContext; +import java.awt.font.GlyphVector; +import java.awt.font.LineMetrics; +import java.awt.font.TextAttribute; +import java.awt.geom.AffineTransform; +import java.awt.geom.Point2D; +import java.awt.geom.Rectangle2D; +import java.io.File; +import java.io.FileInputStream; +import java.io.IOException; +import java.io.InputStream; +import java.nio.ByteBuffer; +import java.nio.channels.FileChannel; +import java.text.CharacterIterator; +import java.text.StringCharacterIterator; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Locale; +import java.util.Map; +import java.util.Properties; +import java.util.Set; + +public class OpenTypeFontPeer + extends ClasspathFontPeer +{ + + /** + * The font mapping as specified in the file fonts.properties. + */ + private static Properties fontProperties; + + /** + * The available font family names. + */ + private static Set<String> availableFontNames; + + /** + * Font spec to file mapping. + */ + private static Map<String,Map<String,String>> fontToFileMap; + + static + { + fontProperties = new Properties(); + InputStream in = OpenTypeFontPeer.class.getResourceAsStream("fonts.properties"); + try + { + fontProperties.load(in); + } + catch (IOException e) + { + e.printStackTrace(); + } + } + + private class XLineMetrics + extends LineMetrics + { + + private Font font; + private GlyphVector glyphVector; +// private CharacterIterator characterIterator; +// private int begin; +// private int limit; + private FontRenderContext fontRenderContext; + XLineMetrics(Font f, CharacterIterator ci, int b, int l, + FontRenderContext rc) + { + font = f; +// characterIterator = ci; +// begin = b; +// limit = l; + fontRenderContext = rc; + glyphVector = fontDelegate.createGlyphVector(font, fontRenderContext, + ci); + } + + public float getAscent() + { + return fontDelegate.getAscent(font.getSize(), fontRenderContext.getTransform(), + fontRenderContext.isAntiAliased(), + fontRenderContext.usesFractionalMetrics(), true); + } + + public int getBaselineIndex() + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public float[] getBaselineOffsets() + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public float getDescent() + { + return (int) fontDelegate.getDescent(font.getSize(), IDENDITY, false, + false, false); + } + + public float getHeight() + { + return (float) glyphVector.getLogicalBounds().getHeight(); + } + + public float getLeading() + { + return getHeight() - getAscent() - getDescent(); + } + + public int getNumChars() + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public float getStrikethroughOffset() + { + return 0.F; + } + + public float getStrikethroughThickness() + { + return 0.F; + } + + public float getUnderlineOffset() + { + return 0.F; + } + + public float getUnderlineThickness() + { + return 0.F; + } + + } + + private class XFontMetrics + extends FontMetrics + { + /** + * A cached point instance, to be used in #charWidth(). + */ + private Point2D cachedPoint = new Point2D.Double(); + + XFontMetrics(Font f) + { + super(f); + } + + public int getAscent() + { + return (int) fontDelegate.getAscent(getFont().getSize(), IDENDITY, + false, false, false); + } + + public int getDescent() + { + return (int) fontDelegate.getDescent(getFont().getSize(), IDENDITY, + false, false, false); + } + + public int getHeight() + { + GlyphVector gv = fontDelegate.createGlyphVector(getFont(), + new FontRenderContext(IDENDITY, false, false), + new StringCharacterIterator("m")); + Rectangle2D b = gv.getVisualBounds(); + return (int) b.getHeight(); + } + + public int charWidth(char c) + { + int code = fontDelegate.getGlyphIndex(c); + Point2D advance = cachedPoint; + fontDelegate.getAdvance(code, font.getSize2D(), IDENDITY, + false, false, true, advance); + return (int) advance.getX(); + } + + public int charsWidth(char[] chars, int offs, int len) + { + return stringWidth(new String(chars, offs, len)); + } + + public int stringWidth(String s) + { + GlyphVector gv = fontDelegate.createGlyphVector(getFont(), + new FontRenderContext(IDENDITY, false, false), + new StringCharacterIterator(s)); + Rectangle2D b = gv.getVisualBounds(); + return (int) b.getWidth(); + } + } + + /** + * The indendity transform, to be used in several methods. + */ + private static final AffineTransform IDENDITY = new AffineTransform(); + + private FontDelegate fontDelegate; + + public OpenTypeFontPeer(String name, int style, int size) + { + super(name, style, size); + try + { + String fontSpec = encodeFont(name, style); + String filename = mapFontToFilename(fontSpec); + File fontfile = new File(filename); + FileInputStream in = new FileInputStream(fontfile); + FileChannel ch = in.getChannel(); + ByteBuffer buffer = ch.map(FileChannel.MapMode.READ_ONLY, 0, + fontfile.length()); + fontDelegate = FontFactory.createFonts(buffer)[0]; + } + catch (Exception ex) + { + ex.printStackTrace(); + } + } + + public OpenTypeFontPeer(String name, Map atts) + { + super(name, atts); + try + { + String fontSpec = encodeFont(name, atts); + String filename = mapFontToFilename(fontSpec); + File fontfile = new File(filename); + FileInputStream in = new FileInputStream(fontfile); + FileChannel ch = in.getChannel(); + ByteBuffer buffer = ch.map(FileChannel.MapMode.READ_ONLY, 0, + fontfile.length()); + fontDelegate = FontFactory.createFonts(buffer)[0]; + } + catch (Exception ex) + { + ex.printStackTrace(); + } + } + + public boolean canDisplay(Font font, int c) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public int canDisplayUpTo(Font font, CharacterIterator i, int start, int limit) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public String getSubFamilyName(Font font, Locale locale) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public String getPostScriptName(Font font) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public int getNumGlyphs(Font font) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public int getMissingGlyphCode(Font font) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public byte getBaselineFor(Font font, char c) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public String getGlyphName(Font font, int glyphIndex) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public GlyphVector createGlyphVector(Font font, FontRenderContext frc, CharacterIterator ci) + { + return fontDelegate.createGlyphVector(font, frc, ci); + } + + public GlyphVector createGlyphVector(Font font, FontRenderContext ctx, int[] glyphCodes) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public GlyphVector layoutGlyphVector(Font font, FontRenderContext frc, char[] chars, int start, int limit, int flags) + { + StringCharacterIterator i = new StringCharacterIterator(new String(chars), start, limit, 0); + return fontDelegate.createGlyphVector(font, frc, i); + } + + public FontMetrics getFontMetrics(Font font) + { + return new XFontMetrics(font); + } + + public boolean hasUniformLineMetrics(Font font) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public LineMetrics getLineMetrics(Font font, CharacterIterator ci, int begin, int limit, FontRenderContext rc) + { + return new XLineMetrics(font, ci, begin, limit, rc); + } + + public Rectangle2D getMaxCharBounds(Font font, FontRenderContext rc) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + /** + * Encodes a font name + style + size specification into a X logical font + * description (XLFD) as described here: + * + * http://www.meretrx.com/e93/docs/xlfd.html + * + * This is implemented to look up the font description in the + * fonts.properties of this package. + * + * @param name the font name + * @param atts the text attributes + * + * @return the encoded font description + */ + public static String encodeFont(String name, Map atts) + { + String family = name; + if (family == null || family.equals("")) + family = (String) atts.get(TextAttribute.FAMILY); + if (family == null) + family = "SansSerif"; + + int style = 0; + // Detect italic attribute. + Float posture = (Float) atts.get(TextAttribute.POSTURE); + if (posture != null && !posture.equals(TextAttribute.POSTURE_REGULAR)) + style |= Font.ITALIC; + + // Detect bold attribute. + Float weight = (Float) atts.get(TextAttribute.WEIGHT); + if (weight != null && weight.compareTo(TextAttribute.WEIGHT_REGULAR) > 0) + style |= Font.BOLD; + + return encodeFont(name, style); + } + + /** + * Encodes a font name + style into a combined string. + * + * This is implemented to look up the font description in the + * fonts.properties of this package. + * + * @param name the font name + * @param style the font style + * + * @return the encoded font description + */ + static String encodeFont(String name, int style) + { + CPStringBuilder key = new CPStringBuilder(); + key.append(validName(name)); + key.append('/'); + switch (style) + { + case Font.BOLD: + key.append("b"); + break; + case Font.ITALIC: + key.append("i"); + break; + case (Font.BOLD | Font.ITALIC): + key.append("bi"); + break; + case Font.PLAIN: + default: + key.append("p"); + + } + + return key.toString(); + } + + /** + * Checks the specified font name for a valid font name. If the font name + * is not known, then this returns 'sansserif' as fallback. + * + * @param name the font name to check + * + * @return a valid font name + */ + static String validName(String name) + { + String retVal; + Set<String> fontNames = getFontNames(); + if (fontNames.contains(name)) + { + retVal = name; + } + else + { + retVal = "SansSerif"; + } + return retVal; + } + + public static String[] getAvailableFontFamilyNames(Locale l) + { + Set<String> fontNames = getFontNames(); + int numNames = fontNames.size(); + String[] ret = fontNames.toArray(new String[numNames]); + return ret; + } + + private static synchronized Set<String> getFontNames() + { + if (availableFontNames == null) + { + HashSet<String> familyNames = new HashSet<String>(); + for (Object o : fontProperties.keySet()) + { + if (o instanceof String) + { + String key = (String) o; + int slashIndex = key.indexOf('/'); + String name = key.substring(0, slashIndex); + familyNames.add(name); + } + } + availableFontNames = familyNames; + } + return availableFontNames; + } + + /** + * Takes a font spec as returned by {@link #encodeFont(String, int)}, + * and returns the corresponding font file, or <code>null</code> if no such + * font mapping exists. + * + * @param fontSpec font name and style as returned by + * {@link #encodeFont(String, int)} + * + * @return filename of the corresponding font file + */ + private synchronized String mapFontToFilename(String fontSpec) + { + if (fontToFileMap == null) + { + fontToFileMap = new HashMap<String,Map<String,String>>(); + + // Initialize font spec to file mapping according to the + // font.properties. + for (Object o : fontProperties.keySet()) + { + if (o instanceof String) + { + String key = (String) o; + int slashIndex = key.indexOf('/'); + String name = key.substring(0, slashIndex); + String spec = key.substring(slashIndex + 1); + // Handle aliases in the 2nd pass below. + if (! spec.equals("a")) + { + Map<String,String> specToFileMap = fontToFileMap.get(name); + if (specToFileMap == null) + { + specToFileMap = new HashMap<String,String>(); + fontToFileMap.put(name, specToFileMap); + } + specToFileMap.put(spec, fontProperties.getProperty(key)); + } + } + } + // 2nd pass for handling aliases. + for (Object o : fontProperties.keySet()) + { + if (o instanceof String) + { + String key = (String) o; + int slashIndex = key.indexOf('/'); + String name = key.substring(0, slashIndex); + String spec = key.substring(slashIndex + 1); + // Handle aliases in the 2nd pass below. + if (spec.equals("a")) + { + String alias = fontProperties.getProperty(key); + Map<String,String> specToFileMap = fontToFileMap.get(alias); + fontToFileMap.put(name, specToFileMap); + } + } + } + } + // Look up font file. + int slashIndex = fontSpec.indexOf('/'); + String name = fontSpec.substring(0, slashIndex); + String spec = fontSpec.substring(slashIndex + 1); + return fontToFileMap.get(name).get(spec); + } +} |