X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Forg%2Fxwt%2FFont.java;h=dc4f41e84080ce8be5073ed478ce1aacd527948b;hb=9c2602143956cd39ecf5ef4c9eb31f5f56b5bd66;hp=9f1fad4165671f3685c899b0989d1d1c71fb1140;hpb=a7bc8922080f56017b141a3835c722344fa4cffc;p=org.ibex.core.git
diff --git a/src/org/xwt/Font.java b/src/org/xwt/Font.java
index 9f1fad4..dc4f41e 100644
--- a/src/org/xwt/Font.java
+++ b/src/org/xwt/Font.java
@@ -6,34 +6,40 @@ import org.xwt.js.*;
import java.util.*;
import java.io.*;
+/** encapsulates a single font (a set of Glyphs) */
public class Font {
- private Font(Res res, int pointsize) { this.res = res; this.pointsize = pointsize; }
-
- public final int pointsize;
- public final Res res;
- public int max_ascent;
- public int max_descent;
- boolean latinCharsPreloaded = true; ///< true if a request to preload ASCII 32-127 has begun
- Glyph[] glyphs = new Glyph[65535];
-
- public static class Glyph {
- public Glyph(char c, Font f) { this.c = c; font = f; }
- public char c;
- public int baseline; // within the picture, this is the y-coordinate of the baseline
- public int advance; // amount to increment the x-coordinate
- public Picture p;
+ private Font(Stream res, int pointsize) { this.res = res; this.pointsize = pointsize; }
+
+ private static boolean glyphRenderingTaskIsScheduled = false;
+
+ public final int pointsize; ///< the size of the font
+ public final Stream res; ///< the resource 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
+ 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 byte[] alphaChannel = null;
+ public int width = -1; ///< the width of the glyph
+ public int height = -1; ///< the height of the glyph
+ public byte[] data = null;
}
// Statics //////////////////////////////////////////////////////////////////////
private static final Freetype freetype = new Freetype();
- private static Cache sizeCache = new Cache(100);
static final Queue glyphsToBeRendered = new Queue(255);
private static Cache fontCache = new Cache(100);
- public static Font getFont(Res res, int pointsize) {
+ public static Font getFont(Stream res, int pointsize) {
Font ret = (Font)fontCache.get(res, new Integer(pointsize));
if (ret == null) fontCache.put(res, new Integer(pointsize), ret = new Font(res, pointsize));
return ret;
@@ -43,47 +49,63 @@ public class Font {
// Methods //////////////////////////////////////////////////////////////////////
/**
- * If the glyphs of text
are not yet loaded, spawn a
- * Task to load them and invoke callback.
+ * Rasterize the glyphs of text
.
*
- * returns the width (in the high-order int) and height (in the
- * low-order int) of the string's rasterization, or -1 if some
- * glyphs are not loaded.
+ * If all the glyphs of text
are not yet loaded,
+ * spawn a Task to load them and then invoke callback. If all
+ * the glyphs are loaded, rasterize them to the
+ * PixelBuffer (if non-null).
+ *
+ * @returns (width<<32)|height
if all glyphs are loaded; else -1
*/
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;
- int width = 0;
- int height = 0;
+ int width = 0, height = 0;
for(int i=0; i>> 32) & 0xffffffff); }
public int textheight(String s) { return (int)(textsize(s) & 0xffffffffL); }
public long textsize(String s) {
@@ -96,10 +118,12 @@ public class Font {
static final Scheduler.Task glyphRenderingTask = new Scheduler.Task() { public void perform() {
Glyph g = (Glyph)glyphsToBeRendered.remove(false);
- if (g == null) return;
- if (g.p != null) { perform(); return; }
- Log.log(Glyph.class, "rendering glyph " + g.c);
- try { freetype.renderGlyph(g); } catch (IOException e) { Log.log(Freetype.class, e); }
- Scheduler.add(this);
+ if (g == null) { glyphRenderingTaskIsScheduled = false; return; }
+ if (g.isLoaded) { perform(); /* tailcall to the next glyph */ return; }
+ //Log.info(Glyph.class, "rendering glyph " + g.c);
+ try { freetype.renderGlyph(g); } catch (IOException e) { Log.info(Freetype.class, e); }
+ g.isLoaded = true;
+ Scheduler.add(this); // keep ourselves in the queue until there are no glyphs to render
+ glyphRenderingTaskIsScheduled = true;
} };
}