Create NSImageRep from CGImage

Question

hi there! I’m trying to pinvoke the AppKit from C#. Any help would be appreciated.

I’m trying to create a new NSBitmapImageRep from a CGImage using the following constructor:
https://developer.apple.com/documentation/appkit/nsbitmapimagerep/1395423-init

I’m trying the following C# code with no luck:

var nsBitmapImageRep = objc_getClass("NSBitmapImageRep");

 var nsBitmapImage = objc_msgSend_retIntPtr_IntPtr(
     nsBitmapImageRep,
     GetSelector("initWithCGImage:"),
     cgImage);

I’m not sure if this is the correct way to construct a new object …

Answer 1

Hello,

If you are using AppKit and you want to create a new NSBitmapImageRep from a CGImage using the constructor in your Xamarin.Mac project, you could refer to the following code:

var image = new NSImage("setting.png");// I create a NSImage to get the CGImage  
var nsBitmapImageRep = new NSBitmapImageRep(image.CGImage);// this parameter is your CGImage   

You also could check the API at https://learn.microsoft.com/en-us/dotnet/api/appkit.nsbitmapimagerep?view=xamarin-mac-sdk-14

Best Regards,
Wenyan Zhang

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