// Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
package org.ibex;
-import org.xwt.translators.*;
+import org.ibex.translators.*;
import org.ibex.util.*;
import java.io.*;
+import java.util.Hashtable;
+
+import org.ibex.js.JSExn;
// FEATURE: this could be cleaner
/** encapsulates a single font (a set of Glyphs) */
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
+ void render() {
+ if (!isLoaded) try { freetype.renderGlyph(this); } catch (IOException e) { Log.info(Freetype.class, e); }
+ isLoaded = true;
+ }
}
// Statics //////////////////////////////////////////////////////////////////////
- private static final Freetype freetype = new Freetype();
- static final Queue glyphsToBeRendered = new Queue(255);
+ static final Freetype freetype = new Freetype();
+ static final Hashtable glyphsToBeCached = new Hashtable();
+ static final Hashtable glyphsToBeDisplayed = new Hashtable();
private static Cache fontCache = new Cache(100);
public static Font getFont(Stream stream, int pointsize) {
Font ret = (Font)fontCache.get(stream, new Integer(pointsize));
/**
* Rasterize the glyphs of <code>text</code>.
- *
- * If all the glyphs of <code>text</code> are not yet loaded,
- * spawn a Task to load them and then invoke callback. If all
- * the glyphs <i>are</i> loaded, rasterize them to the
- * PixelBuffer (if non-null).
- *
- * @returns <code>(width<<32)|height</code> if all glyphs are loaded; else -1
+ * @returns <code>(width<<32)|height</code>
*/
- public long rasterizeGlyphs(final String text, PixelBuffer pb, int textcolor,
- int x, int y, int cx1, int cy1, int cx2, int cy2,
- final Scheduler.Task callback) {
- boolean encounteredUnrenderedGlyph = false;
+ public long rasterizeGlyphs(String text, PixelBuffer pb, int textcolor, int x, int y, int cx1, int cy1, int cx2, int cy2) {
int width = 0, height = 0;
- for(int i=0; i<text.length(); i++) {
- final char c = text.charAt(i);
- Glyph g = glyphs[c];
- if (g == null) {
- g = Platform.createGlyph(this, c);
- glyphs[c] = g;
- }
- if (!g.isLoaded) {
- //Log.debug(Font.class, "rasterizeGlyphs encountered unrasterized glyph " + g.c + " of font " + this);
- //System.out.println("rasterizeGlyphs encountered unrasterized glyph " + g.c + " of font " + this);
- glyphsToBeRendered.prepend(g); // even if it's already in the queue, boost its priority
- encounteredUnrenderedGlyph = true;
- } else if (!encounteredUnrenderedGlyph) {
- if (pb != null) pb.drawGlyph(g, x + width, y + g.font.max_ascent - g.baseline, cx1, cy1, cx2, cy2, textcolor);
- width += g.advance;
- height = java.lang.Math.max(height, max_ascent + max_descent);
+ if (!latinCharsPreloaded) { // preload the Latin-1 charset with low priority (we'll probably want it)
+ for(int i=48; i<57; i++) if (glyphs[i]==null) glyphsToBeCached.put(glyphs[i]=Platform.createGlyph(this, (char)i),"");
+ for(int i=32; i<47; i++) if (glyphs[i]==null) glyphsToBeCached.put(glyphs[i]=Platform.createGlyph(this, (char)i),"");
+ for(int i=57; i<128; i++) if (glyphs[i]==null) glyphsToBeCached.put(glyphs[i]=Platform.createGlyph(this, (char)i),"");
+ if (!glyphRenderingTaskIsScheduled) {
+ Scheduler.add(glyphRenderingTask);
+ glyphRenderingTaskIsScheduled = true;
}
- }
-
- if (!encounteredUnrenderedGlyph) return ((((long)width) << 32) | (long)(height & 0xffffffffL));
-
- if (callback != null) Scheduler.add(new Scheduler.Task() {
- public void perform() throws Exception {
- // FEATURE this isn't terribly efficient... perhaps the task should go on the last glyph?
- for(int i=0; i<text.length(); i++) {
- Glyph g = glyphs[text.charAt(i)];
- if (g == null || !g.isLoaded) { Scheduler.add(this); return; }
- }
- callback.perform();
- }});
-
- // preload the Latin-1 charset with low priority (we'll probably want it)
- if (!latinCharsPreloaded) {
- for(int i=48; i<57; i++) glyphsToBeRendered.append(glyphs[i] = Platform.createGlyph(this, (char)i));
- for(int i=32; i<47; i++) glyphsToBeRendered.append(glyphs[i] = Platform.createGlyph(this, (char)i));
- for(int i=57; i<128; i++) glyphsToBeRendered.append(glyphs[i] = Platform.createGlyph(this, (char)i));
latinCharsPreloaded = true;
}
- if (!glyphRenderingTaskIsScheduled) {
- Scheduler.add(glyphRenderingTask);
- glyphRenderingTaskIsScheduled = true;
+ for(int i=0; i<text.length(); i++) {
+ final char c = text.charAt(i);
+ Glyph g = glyphs[c];
+ if (g == null) glyphs[c] = g = Platform.createGlyph(this, c);
+ g.render();
+ if (pb != null) pb.drawGlyph(g, x + width, y + g.font.max_ascent - g.baseline, cx1, cy1, cx2, cy2, textcolor);
+ width += g.advance;
+ height = java.lang.Math.max(height, max_ascent + max_descent);
}
- return -1;
+ return ((((long)width) << 32) | (long)(height & 0xffffffffL));
}
// FEATURE do we really need to be caching sizes?
public long textsize(String s) {
Long l = (Long)sizeCache.get(s);
if (l != null) return ((Long)l).longValue();
- long ret = rasterizeGlyphs(s, null, 0, 0, 0, 0, 0, 0, 0, null);
- if (ret != -1) sizeCache.put(s, new Long(ret));
- return ret == -1 ? 0 : ret;
+ long ret = rasterizeGlyphs(s, null, 0, 0, 0, 0, 0, 0, 0);
+ sizeCache.put(s, new Long(ret));
+ return ret;
}
static final Scheduler.Task glyphRenderingTask = new Scheduler.Task() { public void perform() {
- Glyph g = (Glyph)glyphsToBeRendered.remove(false);
- if (g == null) { glyphRenderingTaskIsScheduled = false; return; }
- Log.debug(Font.class, "glyphRenderingTask dequeued glyph " + g.c + " of font " + g.font);
- if (g.isLoaded) { perform(); /* tailcall to the next glyph */ return; }
- Log.debug(Glyph.class, "rendering glyph " + g.c);
- try { freetype.renderGlyph(g); } catch (IOException e) { Log.info(Freetype.class, e); }
- Scheduler.add(this); // keep ourselves in the queue until there are no glyphs to render
+ // FIXME: this should be a low-priority task
+ glyphRenderingTaskIsScheduled = false;
+ if (glyphsToBeCached.isEmpty()) return;
+ Glyph g = (Glyph)glyphsToBeCached.keys().nextElement();
+ if (g == null) return;
+ glyphsToBeCached.remove(g);
+ Log.debug(Font.class, "glyphRenderingTask rendering " + g.c + " of " + g.font);
+ g.render();
+ Log.debug(Glyph.class, " done rendering glyph " + g.c);
glyphRenderingTaskIsScheduled = true;
+ Scheduler.add(this);
} };
}
projects / org.ibex.core.git / blobdiff