-// Copyright 2003 Adam Megacz, see the COPYING file for licensing [GPL]
+// Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
package org.xwt;
import java.io.*;
import org.xwt.js.*;
*/
public class Picture {
- public Picture() { this.res = null; }
- public Picture(Stream 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 Stream 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(final Stream r, final Scheduler.Task callback) {
- 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.getInputStream();
- } catch (IOException e) {
- in = null;
- if (r instanceof Stream.Ref) {
- // add extensions to the resource, looking for the image
- Stream.Ref ref = (Stream.Ref)r;
- Stream newr;
-
- String[] exts = new String[] { ".png", ".jpeg", ".gif" };
- for (int i=0; i < exts.length && in == null; i++) {
- newr = ref.addExtension(exts[i]);
- try { in = newr.getInputStream(); }
- catch (IOException f) { in = null; }
- }
- }
+ 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;
}
}