using System.Runtime.CompilerServices; using Windows.Win32; using Windows.Win32.Graphics.GdiPlus; namespace System.Drawing.Imaging.Effects { public abstract class Effect : IDisposable { private unsafe CGpEffect* _nativeEffect; internal unsafe CGpEffect* NativeEffect => _nativeEffect; private protected unsafe Effect(Guid guid) { CGpEffect* nativeEffect = default(CGpEffect*); PInvokeGdiPlus.GdipCreateEffect(guid, &nativeEffect).ThrowIfFailed(); _nativeEffect = nativeEffect; } public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } private protected unsafe void SetParameters<[IsUnmanaged] T>(ref T parameters) where T : struct { fixed (T* params = &parameters) { PInvokeGdiPlus.GdipSetEffectParameters(NativeEffect, params, (uint)sizeof(T)).ThrowIfFailed(); GC.KeepAlive(this); } } ~Effect() { Dispose(false); } protected unsafe virtual void Dispose(bool disposing) { if (_nativeEffect != null) { PInvokeGdiPlus.GdipDeleteEffect(_nativeEffect); _nativeEffect = null; } } } }