BlurBitmapEffect.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / 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.
//------------------------------------------------------------------------------ 
//  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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