| /* 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); |
| } |
| } |