// Copyright 2000-2005 the Contributors, as shown in the revision logs.
// Licensed under the GNU General Public License version 2 ("the License").
// You may not use this file except in compliance with the License.
package org.ibex.graphics;
import org.ibex.util.*;
import java.io.*;
import java.util.Hashtable;
import org.ibex.js.*;
import org.ibex.nestedvm.*;
import org.ibex.plat.*;
import org.ibex.nestedvm.Runtime;
// FEATURE: this could be cleaner
/** encapsulates a single font (a set of Glyphs) */
public class Font {
private Font(JS stream, int pointsize) { this.stream = stream; this.pointsize = pointsize; }
public final int pointsize; ///< the size of the font
public final JS stream; ///< the stream from which this font was loaded
public int max_ascent; ///< the maximum ascent, in pixels
public int max_descent; ///< the maximum descent, in pixels
boolean latinCharsPreloaded = false; ///< true if a request to preload ASCII 32-127 has begun
public Glyph[] glyphs = new Glyph[65535]; ///< the glyphs that comprise this font
public abstract static class Glyph {
protected Glyph(Font font, char c) { this.font = font; this.c = c; }
public final Font font;
public final char c;
public int baseline; ///< within the alphamask, this is the y-coordinate of the baseline
public int advance; ///< amount to increment the x-coordinate
public boolean isLoaded = false; ///< true iff the glyph is loaded
public int width = -1; ///< the width of the glyph
public int height = -1; ///< the height of the glyph
public byte[] data = null; ///< the alpha channel samples for this font
public String path = null; // FIXME this should be shared across point sizes
void render() {
if (!isLoaded) try { renderGlyph(this); } catch (IOException e) { Log.info(Font.class, e); }
isLoaded = true;
}
}
// Statics //////////////////////////////////////////////////////////////////////
static final Queue toBeRasterized = new Queue(300);
static final Queue toBeDisplayed = new Queue(300);
private static Basket.Map fonts = new Basket.Hash();
public static Font getFont(JS stream, int pointsize) {
Basket.Map m = (Basket.Map)fonts.get(stream);
Font ret = null;
if (m != null) ret = (Font)m.get(new Integer(pointsize));
else fonts.put(stream, m = new Basket.Hash());
if (ret == null) m.put(new Integer(pointsize), ret = new Font(stream, pointsize));
return ret;
}
// Methods //////////////////////////////////////////////////////////////////////
/**
* Rasterize the glyphs of text
.
* @returns (width<<32)|height
*/
public String rasterizeGlyphs(String text) {
StringBuffer path = new StringBuffer(text.length() * 50);
for(int i=0; i>> 32) & 0xffffffff); }
public int textheight(String s) { return (int)(textsize(s) & 0xffffffffL); }
public long textsize(String s) {
Long l = (Long)sizeCache.get(s);
if (l != null) return ((Long)l).longValue();
long ret = rasterizeGlyphs(s, null, null, null, null, 0, 0);
sizeCache.put(s, new Long(ret));
return ret;
}
public Glyph getGlyph(char c) {
rasterizeGlyphs(c+"", null, null, null, null, 0, 0);
Glyph g = glyphs[c];
g.render();
return g;
}
static { new Thread() { public void run() {
while(true) {
Glyph g = (Glyph)toBeRasterized.remove(true);
if (g == null) continue;
Log.debug(Font.class, "glyphRenderingTask rendering " + g.c + " of " + g.font);
g.render();
Log.debug(Glyph.class, " done rendering glyph " + g.c);
}
} }.start(); }
// FreeType Interface //////////////////////////////////////////////////////////////////////////////
// FEATURE: use streams, not memoryfont's
// FEATURE: kerning pairs
private static final Runtime rt;
private static JS loadedStream;
private static int loadedStreamAddr;
static {
try {
rt = (Runtime)Class.forName("org.ibex.util.MIPSApps").newInstance();
} catch(Exception e) {
throw new Error("Error instantiating freetype: " + e);
}
rt.start(new String[]{"freetype"});
rt.execute();
rtCheck();
}
private static void rtCheck() { if(rt.getState() != Runtime.PAUSED) throw new Error("Freetype exited " + rt.exitStatus()); }
private static void loadFontByteStream(JS res) {
if(loadedStream == res) return;
try {
Log.info(Font.class, "loading font " + JSU.str(res));
InputStream is = JSU.getInputStream(res);
byte[] fontstream = InputStreamToByteArray.convert(is);
rt.free(loadedStreamAddr);
loadedStreamAddr = rt.xmalloc(fontstream.length);
rt.copyout(fontstream, loadedStreamAddr, fontstream.length);
if(rt.call("load_font", loadedStreamAddr, fontstream.length) != 0)
throw new RuntimeException("load_font failed"); // FEATURE: better error
rtCheck();
loadedStream = res;
} catch (Exception e) {
// FEATURE: Better error reporting (thow an exception?)
Log.info(Font.class, e);
}
}
private static synchronized void renderGlyph(Font.Glyph glyph) throws IOException {
try {
Log.debug(Font.class, "rasterizing glyph " + glyph.c + " of font " + glyph.font);
if (loadedStream != glyph.font.stream) loadFontByteStream(glyph.font.stream);
long start = System.currentTimeMillis();
rt.call("render",glyph.c,glyph.font.pointsize);
rtCheck();
glyph.font.max_ascent = rt.getUserInfo(3);
glyph.font.max_descent = rt.getUserInfo(4);
glyph.baseline = rt.getUserInfo(5);
glyph.advance = rt.getUserInfo(6);
glyph.width = rt.getUserInfo(1);
glyph.height = rt.getUserInfo(2);
glyph.data = new byte[glyph.width * glyph.height];
int addr = rt.getUserInfo(0);
rt.copyin(addr, glyph.data, glyph.width * glyph.height);
byte[] path = new byte[rt.getUserInfo(8)];
rt.copyin(rt.getUserInfo(7), path, rt.getUserInfo(8));
glyph.path = new String(path);
glyph.path += " m " + (64 * glyph.advance) + " 0 ";
glyph.isLoaded = true;
} catch (Exception e) {
// FEATURE: Better error reporting (thow an exception?)
Log.info(Font.class, e);
}
}
}