Automatic support for all fonts available to the Java2D subsystem for all Java2D-descendant renderers (TIFF, PNG, print, AWT).

Improvements in the adapter for Java2D/AWT font metrics.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@406950 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/render/java2d/FontSetup.java

@@ -19,21 +19,49 @@
 package org.apache.fop.render.java2d;
 
 // FOP
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 import org.apache.fop.fonts.FontInfo;
 import org.apache.fop.fonts.Font;
+import org.apache.fop.fonts.FontTriplet;
 
 // Java
 import java.awt.Graphics2D;
+import java.awt.GraphicsEnvironment;
+import java.util.Set;
 
 /**
- * Sets up the AWT fonts. It is similar to
- * org.apache.fop.render.pdf.FontSetup.
+ * Sets up the Java2D/AWT fonts. It is similar to
+ * org.apache.fop.render.fonts.FontSetup.
  * Assigns the font (with metrics) to internal names like "F1" and
  * assigns family-style-weight triplets to the fonts.
  */
 public class FontSetup {
 
+    /** logging instance */
+    protected static Log log = LogFactory.getLog(FontSetup.class);
+    
+    private static final int LAST_PREDEFINED_FONT_NUMBER = 14;
 
+    private static final Set HARDCODED_FONT_NAMES;
+    
+    static {
+        HARDCODED_FONT_NAMES = new java.util.HashSet();
+        HARDCODED_FONT_NAMES.add("any");
+        HARDCODED_FONT_NAMES.add("sans-serif");
+        HARDCODED_FONT_NAMES.add("serif");
+        HARDCODED_FONT_NAMES.add("monospace");
+        
+        HARDCODED_FONT_NAMES.add("Helvetica");
+        HARDCODED_FONT_NAMES.add("Times");
+        HARDCODED_FONT_NAMES.add("Courier");
+        HARDCODED_FONT_NAMES.add("Symbol");
+        HARDCODED_FONT_NAMES.add("ZapfDingbats");
+        HARDCODED_FONT_NAMES.add("Times Roman");
+        HARDCODED_FONT_NAMES.add("Times-Roman");
+        HARDCODED_FONT_NAMES.add("Computer-Modern-Typewriter");
+    }
+    
     /**
      * Sets up the font info object.
      *
@@ -177,7 +205,63 @@ public class FontSetup {
         fontInfo.addFontProperties("F8", "Times Roman", "italic", Font.BOLD);
         fontInfo.addFontProperties("F9", "Computer-Modern-Typewriter",
                                    "normal", Font.NORMAL);
+        
+        configureInstalledAWTFonts(fontInfo, graphics, LAST_PREDEFINED_FONT_NUMBER + 1);
+    }
+
+    private static void configureInstalledAWTFonts(FontInfo fontInfo, Graphics2D graphics, 
+            int startNumber) {
+        int num = startNumber;
+        GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
+        String[] allFontFamilies = env.getAvailableFontFamilyNames();
+        for (int i = 0; i < allFontFamilies.length; i++) {
+            String family = allFontFamilies[i];
+            if (HARDCODED_FONT_NAMES.contains(family)) {
+                continue; //skip
+            }
+
+            if (log.isDebugEnabled()) {
+                log.debug("Registering: " + family);
+            }
+            
+            //Java does not give info about what variants of a font is actually supported, so
+            //we simply register all the basic variants. If we use GraphicsEnvironment.getAllFonts()
+            //we don't get reliable info whether a font is italic or bold or both.
+            int fontStyle;
+            fontStyle = java.awt.Font.PLAIN;
+            registerFontTriplet(fontInfo, family, fontStyle, "F" + num, graphics);
+            num++;
+
+            fontStyle = java.awt.Font.ITALIC;
+            registerFontTriplet(fontInfo, family, fontStyle, "F" + num, graphics);
+            num++;
+
+            fontStyle = java.awt.Font.BOLD;
+            registerFontTriplet(fontInfo, family, fontStyle, "F" + num, graphics);
+            num++;
+
+            fontStyle = java.awt.Font.BOLD | java.awt.Font.ITALIC;
+            registerFontTriplet(fontInfo, family, fontStyle, "F" + num, graphics);
+            num++;
+        }
     }
 
+    private static void registerFontTriplet(FontInfo fontInfo, String family, int fontStyle, 
+            String fontKey, Graphics2D graphics) {
+        FontMetricsMapper metric = new FontMetricsMapper(family, fontStyle, graphics);
+        fontInfo.addMetrics(fontKey, metric);
+        
+        int weight = Font.NORMAL;
+        if ((fontStyle & java.awt.Font.BOLD) != 0) {
+            weight = Font.BOLD;
+        }
+        String style = "normal";
+        if ((fontStyle & java.awt.Font.ITALIC) != 0) {
+            style = "italic";
+        }
+        FontTriplet triplet = FontInfo.createFontKey(family, style, weight);
+        fontInfo.addFontProperties(fontKey, triplet);
+    }
+    
 }
 

src/java/org/apache/fop/render/java2d/Java2DFontMetrics.java

@@ -56,10 +56,20 @@ public class Java2DFontMetrics {
     private int[] width = null;
 
     /**
-     * The typical height of a small cap latter
+     * The typical height of a small cap latter (often derived from "x", value in mpt)
      */
     private int xHeight = 0;
-
+    
+    /**
+     * The highest point of the font above the baseline (usually derived from "d", value in mpt)
+     */
+    private int ascender = 0;
+    
+    /**
+     * The lowest point of the font under the baseline (usually derived from "p", value in mpt)
+     */
+    private int descender = 0;
+    
     /**
      * Buffered font.
      * f1 is bufferd for metric measurements during layout.
@@ -111,7 +121,7 @@ public class Java2DFontMetrics {
      */
     public int getAscender(String family, int style, int size) {
         setFont(family, style, size);
-        // return (int)(FONT_FACTOR * fmt.getAscent());
+        return ascender * 1000;
 
         // workaround for sun bug on FontMetrics.getAscent()
         // http://developer.java.sun.com/developer/bugParade/bugs/4399887.html
@@ -132,9 +142,11 @@ public class Java2DFontMetrics {
          * 
          * xxxxx@xxxxx 2001-05-15
          */
+        /* I don't think this is right.
         int realAscent = fmt.getAscent()
                          - (fmt.getDescent() + fmt.getLeading());
         return FONT_FACTOR * realAscent;
+        */
     }
 
 
@@ -161,7 +173,7 @@ public class Java2DFontMetrics {
      */
     public int getDescender(String family, int style, int size) {
         setFont(family, style, size);
-        return (-1 * FONT_FACTOR * fmt.getDescent());
+        return descender * 1000;
     }
 
     /**
@@ -174,7 +186,7 @@ public class Java2DFontMetrics {
      */
     public int getXHeight(String family, int style, int size) {
         setFont(family, style, size);
-        return (int)(FONT_FACTOR * xHeight);
+        return xHeight * 1000;
     }
 
     /**
@@ -232,10 +244,9 @@ public class Java2DFontMetrics {
      */
     private boolean setFont(String family, int style, int size) {
         boolean changed = false;
-        Rectangle2D rect;
-        TextLayout layout;
         //TODO this seems bad. It rounds font sizes down to the next integer value (=pt)
         int s = (int)(size / 1000f);
+        //int s = size;
 
         if (f1 == null) {
             f1 = new Font(family, style, s);
@@ -255,9 +266,23 @@ public class Java2DFontMetrics {
             // else the font is unchanged from last time
         }
         if (changed) {
-            layout = new TextLayout("m", f1, graphics.getFontRenderContext());
+            //x-Height
+            TextLayout layout = new TextLayout("x", f1, graphics.getFontRenderContext());
+            Rectangle2D rect = layout.getBounds();
+            xHeight = (int)Math.round(-rect.getY() * 1000);
+            
+            //PostScript-compatible ascent
+            layout = new TextLayout("d", f1, graphics.getFontRenderContext());
+            rect = layout.getBounds();
+            ascender = (int)Math.round(-rect.getY() * 1000);
+            
+            //PostScript-compatible descent
+            layout = new TextLayout("p", f1, graphics.getFontRenderContext());
             rect = layout.getBounds();
-            xHeight = (int)rect.getHeight();
+            descender = (int)Math.round((rect.getY() + rect.getHeight()) * -1000);
+            
+            //Alternative way to get metrics but the ascender is again wrong for our purposes
+            //lineMetrics = f1.getLineMetrics("", graphics.getFontRenderContext());
         }
         // save the family and style for later comparison
         this.family = family;

status.xml

@@ -27,6 +27,10 @@
 
   <changes>
     <release version="FOP Trunk">
+      <action context="Code" dev="JM" type="add">
+       Automatic support for all fonts available to the Java2D subsystem for all
+       Java2D-descendant renderers (TIFF, PNG, print, AWT).
+     </action>
       <action context="Code" dev="JM" type="fix">
         Bugfix: Improved baseline detection in TTFReader for TrueType fonts.
       </action>