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 import java.util.zip.*;
   6
   7 // FEATURE: use streams, not memoryfont's
   8 // FEATURE: kerning pairs
   9 public class Font {
  10
  11     Font() { }
  12
  13     private static org.xwt.mips.Interpreter vm = null;
  14
  15     public static synchronized void renderGlyphs(Res res, int pointsize, int firstGlyph, int lastGlyph, Cache glyphCache) {
  16         try {
  17
  18             if (vm == null) {
  19
  20                 InputStream bis = Platform.getBuiltinInputStream();
  21                 ZipInputStream zis = new ZipInputStream(bis);
  22                 for(ZipEntry ze = zis.getNextEntry(); ze != null && !ze.getName().equals("freetype.mips"); ze = zis.getNextEntry());
  23                 byte[] image = Resources.isToByteArray(zis);
  24                 vm = new org.xwt.mips.Interpreter(image);
  25                 vm.start(new String[]{ "freetype.mips" });
  26                 vm.execute();
  27             }
  28
  29             int FONT_RESERVED = 256*1024;
  30             int baseAddr = vm.sbrk(FONT_RESERVED);
  31
  32             byte[] fontstream = Resources.isToByteArray(res.getInputStream());
  33             vm.copyout(fontstream, baseAddr, fontstream.length);
  34             vm.setUserInfo(0, baseAddr);
  35             vm.setUserInfo(1, fontstream.length);
  36             vm.setUserInfo(2, firstGlyph);
  37             vm.setUserInfo(3, lastGlyph);
  38             vm.setUserInfo(4, pointsize);
  39
  40             long start = System.currentTimeMillis();
  41
  42             for(int g = firstGlyph; g <= lastGlyph; g++) {
  43                 vm.execute();
  44
  45                 Glyph glyph = new Glyph();
  46                 glyph.max_ascent = vm.getUserInfo(8);
  47                 glyph.max_descent = vm.getUserInfo(9) - glyph.max_ascent;
  48                 glyph.baseline = vm.getUserInfo(10);
  49                 glyph.advance = vm.getUserInfo(11);
  50                 glyph.c = (char)g;
  51
  52                 gid.width = vm.getUserInfo(6);
  53                 gid.height = vm.getUserInfo(7);
  54                 if (gid.data == null || gid.data.length < gid.width * gid.height)
  55                     gid.data = new int[gid.width * gid.height];
  56                 int addr = vm.getUserInfo(5);
  57
  58                 for(int i=0; i<gid.width * gid.height; i += 4) {
  59                     int val = vm.memRead(addr + i);
  60                     for (int k = 3; k >= 0; k--) {
  61                         if (i + k < gid.width * gid.height)
  62                             gid.data[i + k] = (val & 0xff) << 24;
  63                         val >>>= 8;
  64                     }
  65                 }
  66
  67                 glyph.p = Platform.createPicture(gid);
  68                 glyphCache.put(res, new Integer((g << 16) | pointsize), glyph);
  69             }
  70         } catch (Exception e) {
  71             Log.log(Font.class, e);
  72         }
  73     }
  74
  75     private static GlyphImageDecoder gid = new GlyphImageDecoder();
  76     private static class GlyphImageDecoder extends ImageDecoder {
  77         int[] data = null;
  78         int width, height;
  79         public int getWidth() { return width; }
  80         public int getHeight() { return height; }
  81         public int[] getData() { return data; }
  82     }
  83 }