better-genshin-impact/Vision.WindowCapture/GraphicsCapture/Helpers/CaptureHelper.cs

//  ---------------------------------------------------------------------------------
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//  The MIT License (MIT)
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//  of this software and associated documentation files (the "Software"), to deal
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using System;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Graphics.Capture;
using WinRT;

namespace Vision.WindowCapture.GraphicsCapture.Helpers
{
    public static class CaptureHelper
    {
        static readonly Guid GraphicsCaptureItemGuid = new Guid("79C3F95B-31F7-4EC2-A464-632EF5D30760");

        [ComImport]
        [Guid("3E68D4BD-7135-4D10-8018-9FB6D9F33FA1")]
        [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
        [ComVisible(true)]
        interface IInitializeWithWindow
        {
            void Initialize(
                IntPtr hwnd);
        }

        [ComImport]
        [Guid("3628E81B-3CAC-4C60-B7F4-23CE0E0C3356")]
        [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
        [ComVisible(true)]
        interface IGraphicsCaptureItemInterop
        {
            IntPtr CreateForWindow(
                [In] IntPtr window,
                [In] ref Guid iid);

            IntPtr CreateForMonitor(
                [In] IntPtr monitor,
                [In] ref Guid iid);
        }

        public static void SetWindow(this GraphicsCapturePicker picker, IntPtr hwnd)
        {
            var interop = picker.As<IInitializeWithWindow>();
            interop.Initialize(hwnd);
        }

        public static GraphicsCaptureItem CreateItemForWindow(IntPtr hwnd)
        {
            var factory = WinrtModule.GetActivationFactory("Windows.Graphics.Capture.GraphicsCaptureItem");
            var interop = factory.AsInterface<IGraphicsCaptureItemInterop>();
            var itemPointer = interop.CreateForWindow(hwnd, GraphicsCaptureItemGuid);
            return GraphicsCaptureItem.FromAbi(itemPointer);
        }

        //public static GraphicsCaptureItem CreateItemForMonitor(IntPtr hmon)
        //{
        //    var factory = WindowsRuntimeMarshal.GetActivationFactory(typeof(GraphicsCaptureItem));
        //    var interop = (IGraphicsCaptureItemInterop)factory;
        //    var temp = typeof(GraphicsCaptureItem);         
        //    var itemPointer = interop.CreateForMonitor(hmon, GraphicsCaptureItemGuid);
        //    var item = Marshal.GetObjectForIUnknown(itemPointer) as GraphicsCaptureItem;
        //    Marshal.Release(itemPointer);

        //    return item;
        //}
    }
}