src/org/ibex/translators/Freetype.java

   1 package org.ibex.translators;
   2 import org.ibex.*;
   3 import org.ibex.util.*;
   4 import java.io.*;
   5 import java.util.zip.*;
   6 import java.util.*;
   7 import org.bouncycastle.util.encoders.Base64;
   8
   9 import org.xwt.mips.Runtime;
  10
  11 // FEATURE: use streams, not memoryfont's
  12 // FEATURE: kerning pairs
  13 public class Freetype {
  14
  15     public Freetype() { }
  16
  17     private int mem_allocated = 0;
  18     private Runtime vm = null;
  19
  20     private Stream loadedStream = null;
  21
  22     public void loadFontByteStream(Stream res) {
  23         try {
  24             Log.info(this, "loading font " + res);
  25             loadedStream = res;
  26             InputStream is = Stream.getInputStream(res);
  27             byte[] fontstream = InputStreamToByteArray.convert(is);
  28             vm = (Runtime)Class.forName("org.ibex.translators.MIPSApps").newInstance();
  29             int baseAddr = vm.sbrk(fontstream.length);
  30             vm.copyout(fontstream, baseAddr, fontstream.length);
  31             vm.setUserInfo(0, baseAddr);
  32             vm.setUserInfo(1, fontstream.length);
  33             vm.start(new String[]{ "freetype" });
  34             vm.execute();
  35             if(vm.getState() == Runtime.DONE) throw new Error("Freetype VM exited: " + vm.exitStatus());
  36         } catch (Exception e) {
  37             Log.info(this, e);
  38         }
  39     }
  40
  41     public synchronized void renderGlyph(Font.Glyph glyph) throws IOException {
  42         try {
  43             Log.debug(this, "rasterizing glyph " + glyph.c + " of font " + glyph.font);
  44             if (loadedStream != glyph.font.stream) loadFontByteStream(glyph.font.stream);
  45             vm.setUserInfo(2, (int)glyph.c);
  46             vm.setUserInfo(3, (int)glyph.c);
  47             vm.setUserInfo(4, glyph.font.pointsize);
  48             long start = System.currentTimeMillis();
  49             vm.execute();
  50             glyph.font.max_ascent = vm.getUserInfo(8);
  51             glyph.font.max_descent = vm.getUserInfo(9);
  52             glyph.baseline = vm.getUserInfo(10);
  53             glyph.advance = vm.getUserInfo(11);
  54
  55             glyph.width = vm.getUserInfo(6);
  56             glyph.height = vm.getUserInfo(7);
  57
  58             glyph.data = new byte[glyph.width * glyph.height];
  59             int addr = vm.getUserInfo(5);
  60             vm.copyin(addr, glyph.data, glyph.width * glyph.height);
  61             glyph.isLoaded = true;
  62
  63         } catch (Exception e) {
  64             Log.info(this, e);
  65         }
  66     }
  67 }