public void display() {
// Create autorelease pool per frame to avoid possible deadlock
// situations
// because there are 3 CAMetalDrawables sitting in an autorelease pool.
try (NSAutoreleasePool pool = new NSAutoreleasePool()) {
// handle display changes here
if (layerSizeDidUpdate) {
// set the metal layer to the drawable size in case orientation
// or size changes
CGSize drawableSize = getBounds().getSize();
drawableSize.setWidth(drawableSize.getWidth() * this.getContentScaleFactor());
drawableSize.setHeight(drawableSize.getHeight() * this.getContentScaleFactor());
metalLayer.setDrawableSize(drawableSize);
// renderer delegate method so renderer can resize anything if
// needed
delegate.reshape(this);
layerSizeDidUpdate = false;
}
// rendering delegate method to ask renderer to draw this frame's
// content
delegate.render(this);
// do not retain current drawable beyond the frame.
// There should be no strong references to this object outside of
// this view class
((NSObject) currentDrawable).dispose();
currentDrawable = null;
}
}
public void computeConstantSize() {
CGSize minSize = CGSize.Zero();
CGSize intrinsicSize = CGSize.Zero();
for (Drawable drawable : drawables) {
CGSize min = drawable.getMinimumSize();
CGSize intrinsic = drawable.getIntrinsicSize();
if (min.getWidth() > minSize.getWidth()) minSize.setWidth(min.getWidth());
if (min.getHeight() > minSize.getHeight()) minSize.setHeight(min.getHeight());
if (intrinsic.getWidth() > intrinsicSize.getWidth())
intrinsicSize.setWidth(intrinsic.getWidth());
if (intrinsic.getHeight() > intrinsicSize.getHeight())
intrinsicSize.setHeight(intrinsic.getHeight());
}
this.constantIntrinsicSize = intrinsicSize;
this.constantMinimumSize = minSize;
this.constantSizeComputed = true;
}