| /* GdkFontPeer.java -- Implements FontPeer with GTK+ |
| Copyright (C) 1999, 2004, 2005, 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.peer.gtk; |
| |
| import gnu.java.awt.peer.ClasspathFontPeer; |
| import gnu.java.awt.font.opentype.NameDecoder; |
| |
| import java.awt.Font; |
| import java.awt.FontMetrics; |
| import java.awt.Toolkit; |
| import java.awt.font.FontRenderContext; |
| import java.awt.font.GlyphVector; |
| import java.awt.font.GlyphMetrics; |
| import java.awt.font.LineMetrics; |
| import java.awt.geom.Rectangle2D; |
| import java.text.CharacterIterator; |
| import java.util.Locale; |
| import java.util.Map; |
| import java.util.ResourceBundle; |
| import java.nio.ByteBuffer; |
| import java.util.HashMap; |
| |
| public class GdkFontPeer extends ClasspathFontPeer |
| { |
| static native void initStaticState(); |
| private final int native_state = GtkGenericPeer.getUniqueInteger (); |
| private static ResourceBundle bundle; |
| |
| /** |
| * Cache GlyphMetrics objects. |
| */ |
| private HashMap metricsCache; |
| |
| static |
| { |
| System.loadLibrary("gtkpeer"); |
| |
| initStaticState (); |
| |
| try |
| { |
| bundle = ResourceBundle.getBundle ("gnu.java.awt.peer.gtk.font"); |
| } |
| catch (Throwable ignored) |
| { |
| bundle = null; |
| } |
| } |
| |
| private ByteBuffer nameTable = null; |
| |
| private native void initState (); |
| private native void dispose (); |
| private native void setFont (String family, int style, int size); |
| |
| native void getFontMetrics(double [] metrics); |
| native void getTextMetrics(String str, double [] metrics); |
| |
| native void releasePeerGraphicsResource(); |
| |
| |
| protected void finalize () |
| { |
| releasePeerGraphicsResource(); |
| dispose (); |
| } |
| |
| /* |
| * Helpers for the 3-way overloading that this class seems to suffer |
| * from. Remove them if you feel like they're a performance bottleneck, |
| * for the time being I prefer my code not be written and debugged in |
| * triplicate. |
| */ |
| |
| private String buildString(CharacterIterator iter) |
| { |
| StringBuffer sb = new StringBuffer(); |
| for(char c = iter.first(); c != CharacterIterator.DONE; c = iter.next()) |
| sb.append(c); |
| return sb.toString(); |
| } |
| |
| private String buildString(CharacterIterator iter, int begin, int limit) |
| { |
| StringBuffer sb = new StringBuffer(); |
| int i = 0; |
| for(char c = iter.first(); c != CharacterIterator.DONE; c = iter.next(), i++) |
| { |
| if (begin <= i) |
| sb.append(c); |
| if (limit <= i) |
| break; |
| } |
| return sb.toString(); |
| } |
| |
| private String buildString(char[] chars, int begin, int limit) |
| { |
| return new String(chars, begin, limit - begin); |
| } |
| |
| /* Public API */ |
| |
| public GdkFontPeer (String name, int style) |
| { |
| // All fonts get a default size of 12 if size is not specified. |
| this(name, style, 12); |
| } |
| |
| public GdkFontPeer (String name, int style, int size) |
| { |
| super(name, style, size); |
| initState (); |
| setFont (this.familyName, this.style, (int)this.size); |
| metricsCache = new HashMap(); |
| } |
| |
| public GdkFontPeer (String name, Map attributes) |
| { |
| super(name, attributes); |
| initState (); |
| setFont (this.familyName, this.style, (int)this.size); |
| metricsCache = new HashMap(); |
| } |
| |
| /** |
| * Unneeded, but implemented anyway. |
| */ |
| public String getSubFamilyName(Font font, Locale locale) |
| { |
| String name; |
| |
| if (locale == null) |
| locale = Locale.getDefault(); |
| |
| name = getName(NameDecoder.NAME_SUBFAMILY, locale); |
| if (name == null) |
| { |
| name = getName(NameDecoder.NAME_SUBFAMILY, Locale.ENGLISH); |
| if ("Regular".equals(name)) |
| name = null; |
| } |
| |
| return name; |
| } |
| |
| /** |
| * Returns the bytes belonging to a TrueType/OpenType table, |
| * Parameters n,a,m,e identify the 4-byte ASCII tag of the table. |
| * |
| * Returns null if the font is not TT, the table is nonexistant, |
| * or if some other unexpected error occured. |
| * |
| */ |
| private native byte[] getTrueTypeTable(byte n, byte a, byte m, byte e); |
| |
| /** |
| * Returns the PostScript name of the font, defaults to the familyName if |
| * a PS name could not be retrieved. |
| */ |
| public String getPostScriptName(Font font) |
| { |
| String name = getName(NameDecoder.NAME_POSTSCRIPT, |
| /* any language */ null); |
| if( name == null ) |
| return this.familyName; |
| |
| return name; |
| } |
| |
| /** |
| * Extracts a String from the font’s name table. |
| * |
| * @param name the numeric TrueType or OpenType name ID. |
| * |
| * @param locale the locale for which names shall be localized, or |
| * <code>null</code> if the locale does mot matter because the name |
| * is known to be language-independent (for example, because it is |
| * the PostScript name). |
| */ |
| private String getName(int name, Locale locale) |
| { |
| if (nameTable == null) |
| { |
| byte[] data = getTrueTypeTable((byte)'n', (byte) 'a', |
| (byte) 'm', (byte) 'e'); |
| if( data == null ) |
| return null; |
| |
| nameTable = ByteBuffer.wrap( data ); |
| } |
| |
| return NameDecoder.getName(nameTable, name, locale); |
| } |
| |
| public boolean canDisplay (Font font, char c) |
| { |
| // FIXME: inquire with pango |
| return true; |
| } |
| |
| public int canDisplayUpTo (Font font, CharacterIterator i, int start, int limit) |
| { |
| // FIXME: inquire with pango |
| return -1; |
| } |
| |
| public GlyphVector createGlyphVector (Font font, |
| FontRenderContext ctx, |
| CharacterIterator i) |
| { |
| return new FreetypeGlyphVector(font, buildString (i), ctx); |
| } |
| |
| public GlyphVector createGlyphVector (Font font, |
| FontRenderContext ctx, |
| int[] glyphCodes) |
| { |
| return new FreetypeGlyphVector(font, glyphCodes, ctx); |
| } |
| |
| public byte getBaselineFor (Font font, char c) |
| { |
| // FIXME: Actually check. |
| return Font.ROMAN_BASELINE; |
| } |
| |
| private static class GdkFontLineMetrics extends LineMetrics |
| { |
| private FontMetrics fm; |
| private int nchars; |
| private float strikethroughOffset, strikethroughThickness, |
| underlineOffset, underlineThickness; |
| |
| public GdkFontLineMetrics (GdkFontPeer fp, FontMetrics m, int n) |
| { |
| fm = m; |
| nchars = n; |
| strikethroughOffset = 0f; |
| underlineOffset = 0f; |
| strikethroughThickness = ((float)fp.getSize(null)) / 12f; |
| underlineThickness = strikethroughThickness; |
| } |
| |
| public float getAscent() |
| { |
| return (float) fm.getAscent (); |
| } |
| |
| public int getBaselineIndex() |
| { |
| // FIXME |
| return Font.ROMAN_BASELINE; |
| } |
| |
| public float[] getBaselineOffsets() |
| { |
| return new float[3]; |
| } |
| |
| public float getDescent() |
| { |
| return (float) fm.getDescent (); |
| } |
| |
| public float getHeight() |
| { |
| return (float) fm.getHeight (); |
| } |
| |
| public float getLeading() { return 0.f; } |
| public int getNumChars() { return nchars; } |
| public float getStrikethroughOffset() { return 0.f; } |
| public float getStrikethroughThickness() { return 0.f; } |
| public float getUnderlineOffset() { return 0.f; } |
| public float getUnderlineThickness() { return 0.f; } |
| |
| } |
| |
| public LineMetrics getLineMetrics (Font font, CharacterIterator ci, |
| int begin, int limit, FontRenderContext rc) |
| { |
| return new GdkFontLineMetrics (this, getFontMetrics (font), limit - begin); |
| } |
| |
| public Rectangle2D getMaxCharBounds (Font font, FontRenderContext rc) |
| { |
| throw new UnsupportedOperationException (); |
| } |
| |
| public int getMissingGlyphCode (Font font) |
| { |
| throw new UnsupportedOperationException (); |
| } |
| |
| public String getGlyphName (Font font, int glyphIndex) |
| { |
| throw new UnsupportedOperationException (); |
| } |
| |
| public int getNumGlyphs (Font font) |
| { |
| byte[] data = getTrueTypeTable((byte)'m', (byte) 'a', |
| (byte)'x', (byte) 'p'); |
| if( data == null ) |
| return -1; |
| |
| ByteBuffer buf = ByteBuffer.wrap( data ); |
| return buf.getShort(4); |
| } |
| |
| public Rectangle2D getStringBounds (Font font, CharacterIterator ci, |
| int begin, int limit, FontRenderContext frc) |
| { |
| GlyphVector gv = new FreetypeGlyphVector( font, |
| buildString(ci, begin, limit), |
| frc); |
| return gv.getVisualBounds(); |
| } |
| |
| public boolean hasUniformLineMetrics (Font font) |
| { |
| return true; |
| } |
| |
| public GlyphVector layoutGlyphVector (Font font, FontRenderContext frc, |
| char[] chars, int start, int limit, |
| int flags) |
| { |
| return new FreetypeGlyphVector( font, new String( chars, start, |
| limit - start), |
| frc, flags); |
| } |
| |
| public LineMetrics getLineMetrics (Font font, String str, |
| FontRenderContext frc) |
| { |
| return new GdkFontLineMetrics (this, getFontMetrics (font), str.length ()); |
| } |
| |
| public FontMetrics getFontMetrics (Font font) |
| { |
| // Get the font metrics through GtkToolkit to take advantage of |
| // the metrics cache. |
| return Toolkit.getDefaultToolkit().getFontMetrics (font); |
| } |
| |
| /** |
| * Returns a cached GlyphMetrics object for a given glyphcode, |
| * or null if it doesn't exist in the cache. |
| */ |
| GlyphMetrics getGlyphMetrics( int glyphCode ) |
| { |
| return (GlyphMetrics)metricsCache.get( new Integer( glyphCode ) ); |
| } |
| |
| /** |
| * Put a GlyphMetrics object in the cache. |
| */ |
| void putGlyphMetrics( int glyphCode, Object metrics ) |
| { |
| metricsCache.put( new Integer( glyphCode ), metrics ); |
| } |
| } |