*/
public class Picture {
- public Picture() { this.res = null; }
- public Picture(JS r) { this.res = r; }
+ public Picture() { this.stream = null; }
+ public Picture(JS r) { this.stream = r; }
private static Cache cache = new Cache(100); ///< Picture, keyed by the Stream that loaded them
- public JS res = null; ///< the resource we were loaded from
+ public JS stream = null; ///< the stream we were loaded from
public int width = -1; ///< the width of the image
public int height = -1; ///< the height of the image
public int[] data = null; ///< argb samples
public boolean isLoaded = false; ///< true iff the image is fully loaded
-
- /** turns a resource into a Picture.Source and passes it to the callback */
- public static Picture load(JS rr, final Scheduler.Task callback) {
- final JS r = rr;
- Picture ret = (Picture)cache.get(r);
- if (ret == null) cache.put(r, ret = Platform.createPicture(r));
+
+ /** invoked when an image is fully loaded; subclasses can use this to initialize platform-specific constructs */
+ protected void loaded() { isLoaded = true; }
+
+ /** turns a stream into a Picture.Source and passes it to the callback */
+ public static Picture load(final JS stream, final Scheduler.Task callback) {
+ Picture ret = (Picture)cache.get(stream);
+ if (ret == null) cache.put(stream, ret = Platform.createPicture(stream));
final Picture p = ret;
- if (!ret.isLoaded && callback != null)
+ if (!ret.isLoaded && callback != null) {
+ final XWT.Blessing b = XWT.Blessing.getBlessing(stream);
new java.lang.Thread() { public void run() {
- // get the InputStream for the image
InputStream in = null;
try {
- in = (r instanceof XWT.Blessing) ? ((XWT.Blessing)r).getImage() : Stream.getInputStream(r);
- } catch (IOException e) {
- Log.error(Picture.class, r);
- } catch (JSExn e) {
- Log.error(Picture.class, r);
+ in = b == null ? Stream.getInputStream(stream) : b.getImage();
+ } catch (IOException e) { Log.error(Picture.class, stream);
+ } catch (JSExn e) { Log.error(Picture.class, stream);
}
-
- // could not find image
- if (in == null) { Log.info(Picture.class, "couldn't load image for resource " + r); return; }
-
+ if (in == null) { Log.warn(Picture.class, "couldn't load image for stream " + stream); return; }
try {
PushbackInputStream pbis = new PushbackInputStream(in);
int firstByte = pbis.read();
else if ((firstByte & 0xff) == 137) PNG.load(pbis, p);
else if ((firstByte & 0xff) == 0xff) Platform.decodeJPEG(pbis, p);
else throw new JSExn("couldn't figure out image type from first byte");
- p.isLoaded = true;
+ p.loaded();
Scheduler.add(callback);
} catch (Exception e) {
Log.info(this, "exception while loading image");
Log.info(this, e);
}
} }.start();
-
+ }
return ret;
}
}