src/org/xwt/translators/Font.java

   1 package org.xwt.translators;
   2 import org.xwt.*;
   3 import org.xwt.util.*;
   4 import java.io.*;
   5
   6 // FEATURE: use streams, not memoryfont's
   7 // FEATURE: kerning pairs
   8 public class Font {
   9
  10     Font() { }
  11
  12     private static org.xwt.mips.Interpreter vm = null;
  13
  14     public static synchronized void renderGlyphs(Res res, int pointsize, int firstGlyph, int lastGlyph, Cache glyphCache) {
  15         try {
  16             if (vm == null) {
  17                 vm = new org.xwt.mips.Interpreter("freetype.mips");
  18                 vm.start(new String[]{ "freetype.mips"});
  19                 vm.execute();
  20             }
  21
  22             int FONT_RESERVED = 256*1024;
  23             int baseAddr = vm.sbrk(FONT_RESERVED);
  24
  25             byte[] fontstream = Resources.isToByteArray(res.getInputStream());
  26             vm.copyout(fontstream, baseAddr, fontstream.length);
  27             vm.setUserInfo(0, baseAddr);
  28             vm.setUserInfo(1, fontstream.length);
  29             vm.setUserInfo(2, firstGlyph);
  30             vm.setUserInfo(3, lastGlyph);
  31             vm.setUserInfo(4, pointsize);
  32
  33             long start = System.currentTimeMillis();
  34
  35             for(int g = firstGlyph; g <= lastGlyph; g++) {
  36                 vm.execute();
  37
  38                 Glyph glyph = new Glyph();
  39                 glyph.max_ascent = vm.getUserInfo(8);
  40                 glyph.max_descent = vm.getUserInfo(9) - glyph.max_ascent;
  41                 glyph.baseline = vm.getUserInfo(10);
  42                 glyph.advance = vm.getUserInfo(11);
  43                 glyph.c = (char)g;
  44
  45                 gid.width = vm.getUserInfo(6);
  46                 gid.height = vm.getUserInfo(7);
  47                 if (gid.data == null || gid.data.length < gid.width * gid.height)
  48                     gid.data = new int[gid.width * gid.height];
  49                 int addr = vm.getUserInfo(5);
  50
  51                 for(int i=0; i<gid.width * gid.height; i += 4) {
  52                     int val = vm.memRead(addr + i);
  53                     for (int k = 3; k >= 0; k--) {
  54                         if (i + k < gid.width * gid.height)
  55                             gid.data[i + k] = (val & 0xff) << 24;
  56                         val >>>= 8;
  57                     }
  58                 }
  59
  60                 glyph.p = Platform.createPicture(gid);
  61                 glyphCache.put(res, new Integer((g << 16) | pointsize), glyph);
  62             }
  63         } catch (Exception e) {
  64             Log.log(Font.class, e);
  65         }
  66     }
  67
  68     private static GlyphImageDecoder gid = new GlyphImageDecoder();
  69     private static class GlyphImageDecoder extends ImageDecoder {
  70         int[] data = null;
  71         int width, height;
  72         public int getWidth() { return width; }
  73         public int getHeight() { return height; }
  74         public int[] getData() { return data; }
  75     }
  76 }