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
// Statics //////////////////////////////////////////////////////////////////////
private static final Freetype freetype = new Freetype();
- static final Queue glyphsToBeRendered = new Queue(255);
+ 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));
final Scheduler.Task callback) {
boolean encounteredUnrenderedGlyph = false;
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 (!encounteredUnrenderedGlyph) return ((((long)width) << 32) | (long)(height & 0xffffffffL));
-
- if (callback != null) Scheduler.add(new Scheduler.Task() {
- public void perform() throws IOException, JSExn {
- // 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) {
+ for(int i=48; i<57; i++) glyphsToBeCached.put(glyphs[i] = Platform.createGlyph(this, (char)i),"");
+ for(int i=32; i<47; i++) glyphsToBeCached.put(glyphs[i] = Platform.createGlyph(this, (char)i),"");
+ for(int i=57; i<128; i++) glyphsToBeCached.put(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) {
+ g = Platform.createGlyph(this, c);
+ glyphs[c] = g;
+ }
+ if (!g.isLoaded) {
+ if (!glyphsToBeDisplayed.contains(g)) {
+ glyphsToBeDisplayed.put(g, ""); // move glyph to the display hash
+ glyphsToBeCached.remove(g);
+ 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 (!encounteredUnrenderedGlyph) return ((((long)width) << 32) | (long)(height & 0xffffffffL));
+
+ if (callback != null) Scheduler.add(new Scheduler.Task() {
+ public void perform() throws IOException, JSExn {
+ // 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();
+ }});
return -1;
}
}
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) {
- Log.debug(Glyph.class, "rendering glyph " + g.c);
+ Glyph g = null;
+ if (!glyphsToBeDisplayed.isEmpty()) {
+ g = (Glyph)glyphsToBeDisplayed.keys().nextElement();
+ glyphsToBeDisplayed.remove(g);
+ Log.debug(Font.class, "glyphRenderingTask removed glyph " + g.c + " of font " /*+ g.font*/ + " from glyphsToBeDisplayed");
+ }
+ else if (!glyphsToBeCached.isEmpty()) {
+ g = (Glyph)glyphsToBeCached.keys().nextElement();
+ glyphsToBeCached.remove(g);
+ Log.debug(Font.class, "glyphRenderingTask removed glyph " + g.c + " of font " /*+ g.font*/ + " from glyphsToBeCached");
+ }
+ if (g != null) {
+ Log.debug(Glyph.class, "rendering glyph " + g);
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
+ glyphRenderingTaskIsScheduled = true;
+ }
+ else {
+ glyphRenderingTaskIsScheduled = false;
+ return;
}
- Scheduler.add(this); // keep ourselves in the queue until there are no glyphs to render
- glyphRenderingTaskIsScheduled = true;
} };
}