Hello,

I'm using the http://www.gicentre.org/utils/ zooming/panning library and want to write static content into a buffered image after zooming/panning ended.

I'm using Processing in a Swing-Application and normally update to an
offscreen buffer with:

1.  /** Update items as well as the buffered offscreen image. */
    void update() {
    LOGWRAPPER.debug("[update()]: Available permits: " +
   mLock.availablePermits());
    LOGWRAPPER.debug("parent width: " + mParent.width + " parent
   height: " + mParent.height);
    mBuffer = mParent.createGraphics(mParent.width, mParent.height,
   PConstants.JAVA2D);
    mBuffer.beginDraw();
    updateBuffer();
    mBuffer.endDraw();
    mParent.noLoop();
   
    try {
    mLock.acquire();
    mImg = mBuffer.get(0, 0, mBuffer.width, mBuffer.height);
    } catch (final InterruptedException e) {
    LOGWRAPPER.warn(e.getMessage(), e);
    } finally {
    mLock.release();
    mParent.loop();
    }
    }

This works before zooming or panning, but after zooming/panning ended
I'm doing the following inside public void draw() at the end:

1. if (mZoomPanEnded) {
2.       update();
3.       mZoomPanEnded = false;
4. }

mZoomPanEnded is volatile (I'm pretty sure it doesn't have to) and is
updated in

1. /** Class for responding to the end of a zoom or pan action. */
2. private final class MyListener implements ZoomPanListener {
3.       @Override
4.       public void panEnded() {
5.             LOGWRAPPER.debug("Pan ended!");
6.             mZoomPanEnded = true;
7.       }
8.       @Override
9.       public void zoomEnded() {
10.             LOGWRAPPER.debug("Zoom ended!");
11.             mZoomPanEnded = true;
12.       }
13. }

But it seems the buffered image is crappy, though I'm sure it's because
of mImg = mBuffer.get(0, 0, mBuffer.width, mBuffer.height);

I just want to replace the zoomed/panned drawing with a buffered image
(except for some mouseover-effects). I've included mZoomer.tranform() at
the beginning, but well, I'm pretty sure I mess something up:

1. /**
2. * Draws into an off-screen buffer.
3. */
4. private void updateBuffer() {
5.       mBuffer.pushMatrix();
6.       mZoomer.transform();
7.       mBuffer.colorMode(PConstants.HSB, 360, 100, 100, 100);
8.       mBuffer.background(0, 0, mBackgroundBrightness);
9.       mBuffer.noFill();
10.       mBuffer.ellipseMode(PConstants.RADIUS);
11.       mBuffer.strokeCap(PConstants.SQUARE);
12.       mBuffer.smooth();
13.        mBuffer.translate((float)mParent.width / 2f,
14.       (float)mParent.height / 2f);
15.       // Draw items.
16.       drawItems(EDraw.UPDATEBUFFER);
17.        mBuffer.popMatrix();
18. }

regards,
Johannes