Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media / Effects / BlurBitmapEffect.cs / 1407647 / BlurBitmapEffect.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2005 // // File: BlurBitmapEffect.cs //----------------------------------------------------------------------------- using MS.Internal; using System; using System.IO; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Diagnostics; using System.Reflection; using System.Runtime.InteropServices; using System.Windows; using System.Windows.Media; using System.Windows.Markup; using System.Windows.Media.Animation; using System.Windows.Media.Composition; using MS.Internal.PresentationCore; using System.Security; namespace System.Windows.Media.Effects { ////// BlurBitmapEffectPrimitive /// public sealed partial class BlurBitmapEffect : BitmapEffect { ////// Constructor /// public BlurBitmapEffect() { } ////// Creates the unmanaged effect handle /// ////// Critical - returns a security critical type SafeHandle. /// Safe - Always returns null. /// [SecuritySafeCritical] [Obsolete(MS.Internal.Media.VisualTreeUtils.BitmapEffectObsoleteMessage)] unsafe protected override SafeHandle CreateUnmanagedEffect() { return null; } ////// Update (propagetes) properties to the unmanaged effect /// ////// This method demands permission because effects should not be run /// in partial trust. /// /// SecurityCritical - because SetValue has a link demand /// SecutiryTreatAsSafe - because it demans UIWindow permission /// [SecurityCritical, SecurityTreatAsSafe] [Obsolete(MS.Internal.Media.VisualTreeUtils.BitmapEffectObsoleteMessage)] protected override void UpdateUnmanagedPropertyState(SafeHandle unmanagedEffect) { SecurityHelper.DemandUIWindowPermission(); } ////// An ImageEffect can be used to emulate a BlurBitmapEffect with certain restrictions. This /// method returns true when it is possible to emulate the BlurBitmapEffect using an ImageEffect. /// internal override bool CanBeEmulatedUsingEffectPipeline() { return (Radius <= 100.0); } ////// Returns a Effect that emulates this BlurBitmapEffect. /// internal override Effect GetEmulatingEffect() { if (_imageEffectEmulation != null && _imageEffectEmulation.IsFrozen) { return _imageEffectEmulation; } if (_imageEffectEmulation == null) { _imageEffectEmulation = new BlurEffect(); } double radius = Radius; if (_imageEffectEmulation.Radius != radius) { _imageEffectEmulation.Radius = radius; } KernelType kernelType = KernelType; if (_imageEffectEmulation.KernelType != kernelType) { _imageEffectEmulation.KernelType = kernelType; } _imageEffectEmulation.RenderingBias = RenderingBias.Performance; if (this.IsFrozen) { _imageEffectEmulation.Freeze(); } return _imageEffectEmulation; } BlurEffect _imageEffectEmulation; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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