/// <summary>
/// Create a <see cref="NSImage"/> from a file.
/// </summary>
/// <param name="filename">The filename.</param>
/// <returns>An autoreleased <see cref="NSImage"/> instance</returns>
public static NSImage ImageFromFile(NSString filename)
{
NSImage result = null;
if (filename != null)
{
NSData data = NSData.DataWithContentsOfFile(filename);
result = new NSImage(data);
result.Autorelease();
}
return result;
}
/// <summary>
/// Create a <see cref="NSImage"/> from a stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>An autoreleased <see cref="NSImage"/> instance</returns>
public static NSImage ImageFromStream(Stream stream)
{
NSImage result = null;
if (stream != null)
{
byte[] buffer = new byte[stream.Length];
stream.Read(buffer, 0, (int)stream.Length);
NSData data = new NSData(buffer);
result = new NSImage(data);
data.Release();
result.Autorelease();
}
return result;
}
public NSImage Snapshot(NSRect sourceRect)
{
NSImage snapshot = new NSImage(sourceRect.size);
this.LockFocus();
NSBitmapImageRep rep = new NSBitmapImageRep(sourceRect).SafeAutorelease();
this.UnlockFocus();
snapshot.AddRepresentation(rep);
snapshot.Autorelease();
return snapshot;
}
/// <summary>
/// Returns an autoreleased NSImage, consisting of the selected portion of the reciever's image.
/// If there's no selection, this method will return the original image.
/// </summary>
public NSImage CroppedImage()
{
NSRect sourceImageRect = RectCoveredByImageInBounds(this.Cell.CastTo<NSImageCell>(), this.Bounds);
NSRect newImageBounds = NSRect.NSIntersectionRect(this.selectionMarker.SelectedRect, sourceImageRect);
if (!NSRect.NSIsEmptyRect(newImageBounds))
{
NSImage newImage = new NSImage(sourceImageRect.size);
NSAffineTransform pathAdjustment = NSAffineTransform.Transform;
NSBezierPath croppingPath = this.selectionMarker.SelectedPath;
pathAdjustment.TranslateXByYBy(-NSRect.NSMinX(sourceImageRect), -NSRect.NSMinY(sourceImageRect));
croppingPath = pathAdjustment.TransformBezierPath(croppingPath);
newImage.LockFocus();
NSGraphicsContext.CurrentContext.ShouldAntialias = this.shouldAntiAlias;
NSColor.BlackColor.Set();
croppingPath.Fill();
this.Image.CompositeToPointOperation(NSPoint.NSZeroPoint, NSCompositingOperation.NSCompositeSourceIn);
newImage.UnlockFocus();
newImage.Autorelease();
return newImage;
}
return this.Image;
}
