internal static NSImage TakeSnapshot(NSView view, object data)
{
NSImage snapshot = null;
if (data is IDataObject idata)
{
if (idata.GetData("DragAndDropImage") is Drawing.Image image)
{
snapshot = image.ToNSImage();
}
}
if (snapshot == null && view is MonoView)
{
snapshot = CreateSwatch(new CGSize(32, 22));
}
if (snapshot == null)
{
var b = view.BitmapImageRepForCachingDisplayInRect(view.Bounds);
view.CacheDisplay(view.Bounds, b);
snapshot = new NSImage(view.Bounds.Size);
snapshot.AddRepresentation(b);
}
return(snapshot);
}
public static XIR.Image RemoteRepresentation(this NSView nsview)
{
var bitmap = nsview.BitmapImageRepForCachingDisplayInRect(nsview.Bounds);
if (bitmap == null)
{
return(null);
}
nsview.CacheDisplay(nsview.Bounds, bitmap);
return(bitmap.RemoteRepresentation());
}
protected override void UpdateCapturedImage()
{
if (view != null && layer == null)
{
var bitmap = view.BitmapImageRepForCachingDisplayInRect(view.Bounds);
if (bitmap == null)
{
return;
}
view.CacheDisplay(view.Bounds, bitmap);
var data = bitmap.RepresentationUsingTypeProperties(NSBitmapImageFileType.Png);
CapturedImage = data.ToArray();
}
else if (layer != null)
{
var scale = layer.ContentsScale;
nint h = (nint)(layer.Bounds.Height * scale);
nint w = (nint)(layer.Bounds.Width * scale);
nint bytesPerRow = w * 4;
if (h <= 0 || w <= 0)
{
return;
}
using (var colorSpace = CGColorSpace.CreateGenericRgb())
using (var context = new CGBitmapContext(IntPtr.Zero, w, h, 8, bytesPerRow, colorSpace, CGImageAlphaInfo.PremultipliedLast)) {
// Apply a flipping transform because layers are apparently weird.
var transform = new CGAffineTransform(scale, 0, 0, -scale, 0, h);
context.ConcatCTM(transform);
layer.RenderInContext(context);
using (var image = context.ToImage())
using (var bitmap = new NSBitmapImageRep(image)) {
var data = bitmap.RepresentationUsingTypeProperties(NSBitmapImageFileType.Png);
CapturedImage = data.ToArray();
}
}
}
}
