GeometryGroup.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Core / CSharp / System / Windows / Media / Generated / GeometryGroup.cs / 1 / GeometryGroup.cs

                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// This file was generated, please do not edit it directly. 
// 
// Please see http://wiki/default.aspx/Microsoft.Projects.Avalon/MilCodeGen.html for more information.
// 
//---------------------------------------------------------------------------

using MS.Internal;
using MS.Internal.KnownBoxes; 
using MS.Internal.Collections;
using MS.Internal.PresentationCore; 
using MS.Utility; 
using System;
using System.Collections; 
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Globalization; 
using System.Reflection;
using System.Runtime.InteropServices; 
using System.ComponentModel.Design.Serialization; 
using System.Text;
using System.Windows; 
using System.Windows.Media;
using System.Windows.Media.Effects;
using System.Windows.Media.Media3D;
using System.Windows.Media.Animation; 
using System.Windows.Media.Composition;
using System.Windows.Media.Imaging; 
using System.Windows.Markup; 
using System.Windows.Media.Converters;
using System.Security; 
using System.Security.Permissions;
using SR=MS.Internal.PresentationCore.SR;
using SRID=MS.Internal.PresentationCore.SRID;
// These types are aliased to match the unamanaged names used in interop 
using BOOL = System.UInt32;
using WORD = System.UInt16; 
using Float = System.Single; 

namespace System.Windows.Media 
{


 
    sealed partial class GeometryGroup : Geometry
    { 
        //----------------------------------------------------- 
        //
        //  Public Methods 
        //
        //-----------------------------------------------------

        #region Public Methods 

        ///  
        ///     Shadows inherited Clone() with a strongly typed 
        ///     version for convenience.
        ///  
        public new GeometryGroup Clone()
        {
            return (GeometryGroup)base.Clone();
        } 

        ///  
        ///     Shadows inherited CloneCurrentValue() with a strongly typed 
        ///     version for convenience.
        ///  
        public new GeometryGroup CloneCurrentValue()
        {
            return (GeometryGroup)base.CloneCurrentValue();
        } 

 
 

        #endregion Public Methods 

        //------------------------------------------------------
        //
        //  Public Properties 
        //
        //----------------------------------------------------- 
 
        private static void FillRulePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        { 
            GeometryGroup target = ((GeometryGroup) d);


            target.PropertyChanged(FillRuleProperty); 
        }
        private static void ChildrenPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) 
        { 

 


            // The first change to the default value of a mutable collection property (e.g. GeometryGroup.Children)
            // will promote the property value from a default value to a local value. This is technically a sub-property 
            // change because the collection was changed and not a new collection set (GeometryGroup.Children.
            // Add versus GeometryGroup.Children = myNewChildrenCollection). However, we never marshalled 
            // the default value to the compositor. If the property changes from a default value, the new local value 
            // needs to be marshalled to the compositor. We detect this scenario with the second condition
            // e.OldValueSource != e.NewValueSource. Specifically in this scenario the OldValueSource will be 
            // Default and the NewValueSource will be Local.
            if (e.IsASubPropertyChange &&
               (e.OldValueSource == e.NewValueSource))
            { 
                return;
            } 
 

            GeometryGroup target = ((GeometryGroup) d); 


            // If this is both non-null and mutable, we need to unhook the Changed event.
            GeometryCollection oldCollection = null; 
            GeometryCollection newCollection = null;
 
            if ((e.OldValueSource != BaseValueSourceInternal.Default) || e.IsOldValueModified) 
            {
                oldCollection = (GeometryCollection) e.OldValue; 
                if ((oldCollection != null) && !oldCollection.IsFrozen)
                {
                    oldCollection.ItemRemoved -= target.ChildrenItemRemoved;
                    oldCollection.ItemInserted -= target.ChildrenItemInserted; 
                }
            } 
 
            // If this is both non-null and mutable, we need to hook the Changed event.
            if ((e.NewValueSource != BaseValueSourceInternal.Default) || e.IsNewValueModified) 
            {
                newCollection = (GeometryCollection) e.NewValue;
                if ((newCollection != null) && !newCollection.IsFrozen)
                { 
                    newCollection.ItemInserted += target.ChildrenItemInserted;
                    newCollection.ItemRemoved += target.ChildrenItemRemoved; 
                } 
            }
            if (oldCollection != newCollection && target.Dispatcher != null) 
            {
                using (CompositionEngineLock.Acquire())
                {
                    DUCE.IResource targetResource = (DUCE.IResource)target; 
                    int channelCount = targetResource.GetChannelCount();
 
                    for (int channelIndex = 0; channelIndex < channelCount; channelIndex++) 
                    {
                        DUCE.Channel channel = targetResource.GetChannel(channelIndex); 
                        Debug.Assert(!channel.IsOutOfBandChannel);
                        Debug.Assert(!targetResource.GetHandle(channel).IsNull);
                        // resource shouldn't be null because
                        // 1) If the field is one of our collections, we don't allow null elements 
                        // 2) Codegen already made sure the collection contains DUCE.IResources
                        // ... so we'll Assert it 
 
                        if (newCollection != null)
                        { 
                            int count = newCollection.Count;
                            for (int i = 0; i < count; i++)
                            {
                                DUCE.IResource resource = newCollection.Internal_GetItem(i) as DUCE.IResource; 
                                Debug.Assert(resource != null);
                                resource.AddRefOnChannel(channel); 
                            } 
                        }
 
                        if (oldCollection != null)
                        {
                            int count = oldCollection.Count;
                            for (int i = 0; i < count; i++) 
                            {
                                DUCE.IResource resource = oldCollection.Internal_GetItem(i) as DUCE.IResource; 
                                Debug.Assert(resource != null); 
                                resource.ReleaseOnChannel(channel);
                            } 
                        }
                    }
                }
            } 
            target.PropertyChanged(ChildrenProperty);
        } 
 

        #region Public Properties 

        /// 
        ///     FillRule - FillRule.  Default value is FillRule.EvenOdd.
        ///  
        public FillRule FillRule
        { 
            get 
            {
                return (FillRule) GetValue(FillRuleProperty); 
            }
            set
            {
                SetValueInternal(FillRuleProperty, FillRuleBoxes.Box(value)); 
            }
        } 
 
        /// 
        ///     Children - GeometryCollection.  Default value is new FreezableDefaultValueFactory(GeometryCollection.Empty). 
        /// 
        public GeometryCollection Children
        {
            get 
            {
                return (GeometryCollection) GetValue(ChildrenProperty); 
            } 
            set
            { 
                SetValueInternal(ChildrenProperty, value);
            }
        }
 
        #endregion Public Properties
 
        //------------------------------------------------------ 
        //
        //  Protected Methods 
        //
        //------------------------------------------------------

        #region Protected Methods 

        ///  
        /// Implementation of Freezable.CreateInstanceCore. 
        /// 
        /// The new Freezable. 
        protected override Freezable CreateInstanceCore()
        {
            return new GeometryGroup();
        } 

 
 
        #endregion ProtectedMethods
 
        //-----------------------------------------------------
        //
        //  Internal Methods
        // 
        //------------------------------------------------------
 
        #region Internal Methods 

        ///  
        ///     Critical: This code calls into an unsafe code block
        ///     TreatAsSafe: This code does not return any critical data.It is ok to expose
        ///     Channels are safe to call into and do not go cross domain and cross process
        ///  
        [SecurityCritical,SecurityTreatAsSafe]
        internal override void UpdateResource(DUCE.Channel channel, bool skipOnChannelCheck) 
        { 
            // If we're told we can skip the channel check, then we must be on channel
            Debug.Assert(!skipOnChannelCheck || _duceResource.IsOnChannel(channel)); 

            if (skipOnChannelCheck || _duceResource.IsOnChannel(channel))
            {
                base.UpdateResource(channel, skipOnChannelCheck); 

                // Read values of properties into local variables 
                Transform vTransform = Transform; 
                GeometryCollection vChildren = Children;
 
                // Obtain handles for properties that implement DUCE.IResource
                DUCE.ResourceHandle hTransform;
                if (vTransform == null ||
                    Object.ReferenceEquals(vTransform, Transform.Identity) 
                    )
                { 
                    hTransform = DUCE.ResourceHandle.Null; 
                }
                else 
                {
                    hTransform = ((DUCE.IResource)vTransform).GetHandle(channel);
                }
 
                // Store the count of this resource's contained collections in local variables.
                int ChildrenCount = (vChildren == null) ? 0 : vChildren.Count; 
 
                // Pack & send command packet
                DUCE.MILCMD_GEOMETRYGROUP data; 
                unsafe
                {
                    data.Type = MILCMD.MilCmdGeometryGroup;
                    data.Handle = _duceResource.GetHandle(channel); 
                    data.hTransform = hTransform;
                    data.FillRule = FillRule; 
                    data.ChildrenSize = (uint)(sizeof(DUCE.ResourceHandle) * ChildrenCount); 

                    channel.BeginCommand( 
                        (byte*)&data,
                        sizeof(DUCE.MILCMD_GEOMETRYGROUP),
                        (int)(data.ChildrenSize)
                        ); 

 
                    // Copy this collection's elements (or their handles) to reserved data 
                    for(int i = 0; i < ChildrenCount; i++)
                    { 
                        DUCE.ResourceHandle resource = ((DUCE.IResource)vChildren.Internal_GetItem(i)).GetHandle(channel);;
                        channel.AppendCommandData(
                            (byte*)&resource,
                            sizeof(DUCE.ResourceHandle) 
                            );
                    } 
 
                    channel.EndCommand();
                } 
            }
        }
        internal override DUCE.ResourceHandle AddRefOnChannelCore(DUCE.Channel channel)
        { 

                if (_duceResource.CreateOrAddRefOnChannel(channel, System.Windows.Media.Composition.DUCE.ResourceType.TYPE_GEOMETRYGROUP)) 
                { 
                    Transform vTransform = Transform;
                    if (vTransform != null) ((DUCE.IResource)vTransform).AddRefOnChannel(channel); 

                    GeometryCollection vChildren = Children;

                    if (vChildren != null) 
                    {
                        int count = vChildren.Count; 
                        for (int i = 0; i < count; i++) 
                        {
                            ((DUCE.IResource) vChildren.Internal_GetItem(i)).AddRefOnChannel(channel); 
                        }
                    }
                    AddRefOnChannelAnimations(channel);
 

                    UpdateResource(channel, true /* skip "on channel" check - we already know that we're on channel */ ); 
                } 

                return _duceResource.GetHandle(channel); 

        }
        internal override void ReleaseOnChannelCore(DUCE.Channel channel)
        { 

                Debug.Assert(_duceResource.IsOnChannel(channel)); 
 
                if (_duceResource.ReleaseOnChannel(channel))
                { 
                    Transform vTransform = Transform;
                    if (vTransform != null) ((DUCE.IResource)vTransform).ReleaseOnChannel(channel);

                    GeometryCollection vChildren = Children; 

                    if (vChildren != null) 
                    { 
                        int count = vChildren.Count;
                        for (int i = 0; i < count; i++) 
                        {
                            ((DUCE.IResource) vChildren.Internal_GetItem(i)).ReleaseOnChannel(channel);
                        }
                    } 
                    ReleaseOnChannelAnimations(channel);
 
                } 

        } 
        internal override DUCE.ResourceHandle GetHandleCore(DUCE.Channel channel)
        {
            // Note that we are in a lock here already.
            return _duceResource.GetHandle(channel); 
        }
        internal override int GetChannelCountCore() 
        { 
            // must already be in composition lock here
            return _duceResource.GetChannelCount(); 
        }
        internal override DUCE.Channel GetChannelCore(int index)
        {
            // Note that we are in a lock here already. 
            return _duceResource.GetChannel(index);
        } 
 
        private void ChildrenItemInserted(object sender, object item)
        { 
            if (this.Dispatcher != null)
            {
                DUCE.IResource thisResource = (DUCE.IResource)this;
                using (CompositionEngineLock.Acquire()) 
                {
                    int channelCount = thisResource.GetChannelCount(); 
 
                    for (int channelIndex = 0; channelIndex < channelCount; channelIndex++)
                    { 
                        DUCE.Channel channel = thisResource.GetChannel(channelIndex);
                        Debug.Assert(!channel.IsOutOfBandChannel);
                        Debug.Assert(!thisResource.GetHandle(channel).IsNull);
 
                        // We're on a channel, which means our dependents are also on the channel.
                        DUCE.IResource addResource = item as DUCE.IResource; 
                        if (addResource != null) 
                        {
                            addResource.AddRefOnChannel(channel); 
                        }

                        UpdateResource(channel, true /* skip on channel check */);
                    } 
                }
            } 
        } 

        private void ChildrenItemRemoved(object sender, object item) 
        {
            if (this.Dispatcher != null)
            {
                DUCE.IResource thisResource = (DUCE.IResource)this; 
                using (CompositionEngineLock.Acquire())
                { 
                    int channelCount = thisResource.GetChannelCount(); 

                    for (int channelIndex = 0; channelIndex < channelCount; channelIndex++) 
                    {
                        DUCE.Channel channel = thisResource.GetChannel(channelIndex);
                        Debug.Assert(!channel.IsOutOfBandChannel);
                        Debug.Assert(!thisResource.GetHandle(channel).IsNull); 

                        UpdateResource(channel, true /* is on channel check */); 
 
                        // We're on a channel, which means our dependents are also on the channel.
                        DUCE.IResource releaseResource = item as DUCE.IResource; 
                        if (releaseResource != null)
                        {
                            releaseResource.ReleaseOnChannel(channel);
                        } 
                    }
                } 
            } 
        }
 
        #endregion Internal Methods

        //-----------------------------------------------------
        // 
        //  Internal Properties
        // 
        //----------------------------------------------------- 

        #region Internal Properties 

        //
        //  This property finds the correct initial size for the _effectiveValues store on the
        //  current DependencyObject as a performance optimization 
        //
        //  This includes: 
        //    Children 
        //
        internal override int EffectiveValuesInitialSize 
        {
            get
            {
                return 1; 
            }
        } 
 

 
        #endregion Internal Properties

        //-----------------------------------------------------
        // 
        //  Dependency Properties
        // 
        //------------------------------------------------------ 

        #region Dependency Properties 

        /// 
        ///     The DependencyProperty for the GeometryGroup.FillRule property.
        ///  
        public static readonly DependencyProperty FillRuleProperty;
        ///  
        ///     The DependencyProperty for the GeometryGroup.Children property. 
        /// 
        public static readonly DependencyProperty ChildrenProperty; 

        #endregion Dependency Properties

        //----------------------------------------------------- 
        //
        //  Internal Fields 
        // 
        //------------------------------------------------------
 
        #region Internal Fields


 
        internal System.Windows.Media.Composition.DUCE.MultiChannelResource _duceResource = new System.Windows.Media.Composition.DUCE.MultiChannelResource();
 
        internal const FillRule c_FillRule = FillRule.EvenOdd; 
        internal static GeometryCollection s_Children = GeometryCollection.Empty;
 
        #endregion Internal Fields


 
        #region Constructors
 
        //------------------------------------------------------ 
        //
        //  Constructors 
        //
        //-----------------------------------------------------

        static GeometryGroup() 
        {
            // We check our static default fields which are of type Freezable 
            // to make sure that they are not mutable, otherwise we will throw 
            // if these get touched by more than one thread in the lifetime
            // of your app.  (Windows OS Bug #947272) 
            //
            Debug.Assert(s_Children == null || s_Children.IsFrozen,
                "Detected context bound default value GeometryGroup.s_Children (See OS Bug #947272).");
 

            // Initializations 
            Type typeofThis = typeof(GeometryGroup); 
            FillRuleProperty =
                  RegisterProperty("FillRule", 
                                   typeof(FillRule),
                                   typeofThis,
                                   FillRule.EvenOdd,
                                   new PropertyChangedCallback(FillRulePropertyChanged), 
                                   new ValidateValueCallback(System.Windows.Media.ValidateEnums.IsFillRuleValid),
                                   /* isIndependentlyAnimated  = */ false, 
                                   /* coerceValueCallback */ null); 
            ChildrenProperty =
                  RegisterProperty("Children", 
                                   typeof(GeometryCollection),
                                   typeofThis,
                                   new FreezableDefaultValueFactory(GeometryCollection.Empty),
                                   new PropertyChangedCallback(ChildrenPropertyChanged), 
                                   null,
                                   /* isIndependentlyAnimated  = */ false, 
                                   /* coerceValueCallback */ null); 
        }
 


        #endregion Constructors
 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// This file was generated, please do not edit it directly. 
// 
// Please see http://wiki/default.aspx/Microsoft.Projects.Avalon/MilCodeGen.html for more information.
// 
//---------------------------------------------------------------------------

using MS.Internal;
using MS.Internal.KnownBoxes; 
using MS.Internal.Collections;
using MS.Internal.PresentationCore; 
using MS.Utility; 
using System;
using System.Collections; 
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Globalization; 
using System.Reflection;
using System.Runtime.InteropServices; 
using System.ComponentModel.Design.Serialization; 
using System.Text;
using System.Windows; 
using System.Windows.Media;
using System.Windows.Media.Effects;
using System.Windows.Media.Media3D;
using System.Windows.Media.Animation; 
using System.Windows.Media.Composition;
using System.Windows.Media.Imaging; 
using System.Windows.Markup; 
using System.Windows.Media.Converters;
using System.Security; 
using System.Security.Permissions;
using SR=MS.Internal.PresentationCore.SR;
using SRID=MS.Internal.PresentationCore.SRID;
// These types are aliased to match the unamanaged names used in interop 
using BOOL = System.UInt32;
using WORD = System.UInt16; 
using Float = System.Single; 

namespace System.Windows.Media 
{


 
    sealed partial class GeometryGroup : Geometry
    { 
        //----------------------------------------------------- 
        //
        //  Public Methods 
        //
        //-----------------------------------------------------

        #region Public Methods 

        ///  
        ///     Shadows inherited Clone() with a strongly typed 
        ///     version for convenience.
        ///  
        public new GeometryGroup Clone()
        {
            return (GeometryGroup)base.Clone();
        } 

        ///  
        ///     Shadows inherited CloneCurrentValue() with a strongly typed 
        ///     version for convenience.
        ///  
        public new GeometryGroup CloneCurrentValue()
        {
            return (GeometryGroup)base.CloneCurrentValue();
        } 

 
 

        #endregion Public Methods 

        //------------------------------------------------------
        //
        //  Public Properties 
        //
        //----------------------------------------------------- 
 
        private static void FillRulePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        { 
            GeometryGroup target = ((GeometryGroup) d);


            target.PropertyChanged(FillRuleProperty); 
        }
        private static void ChildrenPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) 
        { 

 


            // The first change to the default value of a mutable collection property (e.g. GeometryGroup.Children)
            // will promote the property value from a default value to a local value. This is technically a sub-property 
            // change because the collection was changed and not a new collection set (GeometryGroup.Children.
            // Add versus GeometryGroup.Children = myNewChildrenCollection). However, we never marshalled 
            // the default value to the compositor. If the property changes from a default value, the new local value 
            // needs to be marshalled to the compositor. We detect this scenario with the second condition
            // e.OldValueSource != e.NewValueSource. Specifically in this scenario the OldValueSource will be 
            // Default and the NewValueSource will be Local.
            if (e.IsASubPropertyChange &&
               (e.OldValueSource == e.NewValueSource))
            { 
                return;
            } 
 

            GeometryGroup target = ((GeometryGroup) d); 


            // If this is both non-null and mutable, we need to unhook the Changed event.
            GeometryCollection oldCollection = null; 
            GeometryCollection newCollection = null;
 
            if ((e.OldValueSource != BaseValueSourceInternal.Default) || e.IsOldValueModified) 
            {
                oldCollection = (GeometryCollection) e.OldValue; 
                if ((oldCollection != null) && !oldCollection.IsFrozen)
                {
                    oldCollection.ItemRemoved -= target.ChildrenItemRemoved;
                    oldCollection.ItemInserted -= target.ChildrenItemInserted; 
                }
            } 
 
            // If this is both non-null and mutable, we need to hook the Changed event.
            if ((e.NewValueSource != BaseValueSourceInternal.Default) || e.IsNewValueModified) 
            {
                newCollection = (GeometryCollection) e.NewValue;
                if ((newCollection != null) && !newCollection.IsFrozen)
                { 
                    newCollection.ItemInserted += target.ChildrenItemInserted;
                    newCollection.ItemRemoved += target.ChildrenItemRemoved; 
                } 
            }
            if (oldCollection != newCollection && target.Dispatcher != null) 
            {
                using (CompositionEngineLock.Acquire())
                {
                    DUCE.IResource targetResource = (DUCE.IResource)target; 
                    int channelCount = targetResource.GetChannelCount();
 
                    for (int channelIndex = 0; channelIndex < channelCount; channelIndex++) 
                    {
                        DUCE.Channel channel = targetResource.GetChannel(channelIndex); 
                        Debug.Assert(!channel.IsOutOfBandChannel);
                        Debug.Assert(!targetResource.GetHandle(channel).IsNull);
                        // resource shouldn't be null because
                        // 1) If the field is one of our collections, we don't allow null elements 
                        // 2) Codegen already made sure the collection contains DUCE.IResources
                        // ... so we'll Assert it 
 
                        if (newCollection != null)
                        { 
                            int count = newCollection.Count;
                            for (int i = 0; i < count; i++)
                            {
                                DUCE.IResource resource = newCollection.Internal_GetItem(i) as DUCE.IResource; 
                                Debug.Assert(resource != null);
                                resource.AddRefOnChannel(channel); 
                            } 
                        }
 
                        if (oldCollection != null)
                        {
                            int count = oldCollection.Count;
                            for (int i = 0; i < count; i++) 
                            {
                                DUCE.IResource resource = oldCollection.Internal_GetItem(i) as DUCE.IResource; 
                                Debug.Assert(resource != null); 
                                resource.ReleaseOnChannel(channel);
                            } 
                        }
                    }
                }
            } 
            target.PropertyChanged(ChildrenProperty);
        } 
 

        #region Public Properties 

        /// 
        ///     FillRule - FillRule.  Default value is FillRule.EvenOdd.
        ///  
        public FillRule FillRule
        { 
            get 
            {
                return (FillRule) GetValue(FillRuleProperty); 
            }
            set
            {
                SetValueInternal(FillRuleProperty, FillRuleBoxes.Box(value)); 
            }
        } 
 
        /// 
        ///     Children - GeometryCollection.  Default value is new FreezableDefaultValueFactory(GeometryCollection.Empty). 
        /// 
        public GeometryCollection Children
        {
            get 
            {
                return (GeometryCollection) GetValue(ChildrenProperty); 
            } 
            set
            { 
                SetValueInternal(ChildrenProperty, value);
            }
        }
 
        #endregion Public Properties
 
        //------------------------------------------------------ 
        //
        //  Protected Methods 
        //
        //------------------------------------------------------

        #region Protected Methods 

        ///  
        /// Implementation of Freezable.CreateInstanceCore. 
        /// 
        /// The new Freezable. 
        protected override Freezable CreateInstanceCore()
        {
            return new GeometryGroup();
        } 

 
 
        #endregion ProtectedMethods
 
        //-----------------------------------------------------
        //
        //  Internal Methods
        // 
        //------------------------------------------------------
 
        #region Internal Methods 

        ///  
        ///     Critical: This code calls into an unsafe code block
        ///     TreatAsSafe: This code does not return any critical data.It is ok to expose
        ///     Channels are safe to call into and do not go cross domain and cross process
        ///  
        [SecurityCritical,SecurityTreatAsSafe]
        internal override void UpdateResource(DUCE.Channel channel, bool skipOnChannelCheck) 
        { 
            // If we're told we can skip the channel check, then we must be on channel
            Debug.Assert(!skipOnChannelCheck || _duceResource.IsOnChannel(channel)); 

            if (skipOnChannelCheck || _duceResource.IsOnChannel(channel))
            {
                base.UpdateResource(channel, skipOnChannelCheck); 

                // Read values of properties into local variables 
                Transform vTransform = Transform; 
                GeometryCollection vChildren = Children;
 
                // Obtain handles for properties that implement DUCE.IResource
                DUCE.ResourceHandle hTransform;
                if (vTransform == null ||
                    Object.ReferenceEquals(vTransform, Transform.Identity) 
                    )
                { 
                    hTransform = DUCE.ResourceHandle.Null; 
                }
                else 
                {
                    hTransform = ((DUCE.IResource)vTransform).GetHandle(channel);
                }
 
                // Store the count of this resource's contained collections in local variables.
                int ChildrenCount = (vChildren == null) ? 0 : vChildren.Count; 
 
                // Pack & send command packet
                DUCE.MILCMD_GEOMETRYGROUP data; 
                unsafe
                {
                    data.Type = MILCMD.MilCmdGeometryGroup;
                    data.Handle = _duceResource.GetHandle(channel); 
                    data.hTransform = hTransform;
                    data.FillRule = FillRule; 
                    data.ChildrenSize = (uint)(sizeof(DUCE.ResourceHandle) * ChildrenCount); 

                    channel.BeginCommand( 
                        (byte*)&data,
                        sizeof(DUCE.MILCMD_GEOMETRYGROUP),
                        (int)(data.ChildrenSize)
                        ); 

 
                    // Copy this collection's elements (or their handles) to reserved data 
                    for(int i = 0; i < ChildrenCount; i++)
                    { 
                        DUCE.ResourceHandle resource = ((DUCE.IResource)vChildren.Internal_GetItem(i)).GetHandle(channel);;
                        channel.AppendCommandData(
                            (byte*)&resource,
                            sizeof(DUCE.ResourceHandle) 
                            );
                    } 
 
                    channel.EndCommand();
                } 
            }
        }
        internal override DUCE.ResourceHandle AddRefOnChannelCore(DUCE.Channel channel)
        { 

                if (_duceResource.CreateOrAddRefOnChannel(channel, System.Windows.Media.Composition.DUCE.ResourceType.TYPE_GEOMETRYGROUP)) 
                { 
                    Transform vTransform = Transform;
                    if (vTransform != null) ((DUCE.IResource)vTransform).AddRefOnChannel(channel); 

                    GeometryCollection vChildren = Children;

                    if (vChildren != null) 
                    {
                        int count = vChildren.Count; 
                        for (int i = 0; i < count; i++) 
                        {
                            ((DUCE.IResource) vChildren.Internal_GetItem(i)).AddRefOnChannel(channel); 
                        }
                    }
                    AddRefOnChannelAnimations(channel);
 

                    UpdateResource(channel, true /* skip "on channel" check - we already know that we're on channel */ ); 
                } 

                return _duceResource.GetHandle(channel); 

        }
        internal override void ReleaseOnChannelCore(DUCE.Channel channel)
        { 

                Debug.Assert(_duceResource.IsOnChannel(channel)); 
 
                if (_duceResource.ReleaseOnChannel(channel))
                { 
                    Transform vTransform = Transform;
                    if (vTransform != null) ((DUCE.IResource)vTransform).ReleaseOnChannel(channel);

                    GeometryCollection vChildren = Children; 

                    if (vChildren != null) 
                    { 
                        int count = vChildren.Count;
                        for (int i = 0; i < count; i++) 
                        {
                            ((DUCE.IResource) vChildren.Internal_GetItem(i)).ReleaseOnChannel(channel);
                        }
                    } 
                    ReleaseOnChannelAnimations(channel);
 
                } 

        } 
        internal override DUCE.ResourceHandle GetHandleCore(DUCE.Channel channel)
        {
            // Note that we are in a lock here already.
            return _duceResource.GetHandle(channel); 
        }
        internal override int GetChannelCountCore() 
        { 
            // must already be in composition lock here
            return _duceResource.GetChannelCount(); 
        }
        internal override DUCE.Channel GetChannelCore(int index)
        {
            // Note that we are in a lock here already. 
            return _duceResource.GetChannel(index);
        } 
 
        private void ChildrenItemInserted(object sender, object item)
        { 
            if (this.Dispatcher != null)
            {
                DUCE.IResource thisResource = (DUCE.IResource)this;
                using (CompositionEngineLock.Acquire()) 
                {
                    int channelCount = thisResource.GetChannelCount(); 
 
                    for (int channelIndex = 0; channelIndex < channelCount; channelIndex++)
                    { 
                        DUCE.Channel channel = thisResource.GetChannel(channelIndex);
                        Debug.Assert(!channel.IsOutOfBandChannel);
                        Debug.Assert(!thisResource.GetHandle(channel).IsNull);
 
                        // We're on a channel, which means our dependents are also on the channel.
                        DUCE.IResource addResource = item as DUCE.IResource; 
                        if (addResource != null) 
                        {
                            addResource.AddRefOnChannel(channel); 
                        }

                        UpdateResource(channel, true /* skip on channel check */);
                    } 
                }
            } 
        } 

        private void ChildrenItemRemoved(object sender, object item) 
        {
            if (this.Dispatcher != null)
            {
                DUCE.IResource thisResource = (DUCE.IResource)this; 
                using (CompositionEngineLock.Acquire())
                { 
                    int channelCount = thisResource.GetChannelCount(); 

                    for (int channelIndex = 0; channelIndex < channelCount; channelIndex++) 
                    {
                        DUCE.Channel channel = thisResource.GetChannel(channelIndex);
                        Debug.Assert(!channel.IsOutOfBandChannel);
                        Debug.Assert(!thisResource.GetHandle(channel).IsNull); 

                        UpdateResource(channel, true /* is on channel check */); 
 
                        // We're on a channel, which means our dependents are also on the channel.
                        DUCE.IResource releaseResource = item as DUCE.IResource; 
                        if (releaseResource != null)
                        {
                            releaseResource.ReleaseOnChannel(channel);
                        } 
                    }
                } 
            } 
        }
 
        #endregion Internal Methods

        //-----------------------------------------------------
        // 
        //  Internal Properties
        // 
        //----------------------------------------------------- 

        #region Internal Properties 

        //
        //  This property finds the correct initial size for the _effectiveValues store on the
        //  current DependencyObject as a performance optimization 
        //
        //  This includes: 
        //    Children 
        //
        internal override int EffectiveValuesInitialSize 
        {
            get
            {
                return 1; 
            }
        } 
 

 
        #endregion Internal Properties

        //-----------------------------------------------------
        // 
        //  Dependency Properties
        // 
        //------------------------------------------------------ 

        #region Dependency Properties 

        /// 
        ///     The DependencyProperty for the GeometryGroup.FillRule property.
        ///  
        public static readonly DependencyProperty FillRuleProperty;
        ///  
        ///     The DependencyProperty for the GeometryGroup.Children property. 
        /// 
        public static readonly DependencyProperty ChildrenProperty; 

        #endregion Dependency Properties

        //----------------------------------------------------- 
        //
        //  Internal Fields 
        // 
        //------------------------------------------------------
 
        #region Internal Fields


 
        internal System.Windows.Media.Composition.DUCE.MultiChannelResource _duceResource = new System.Windows.Media.Composition.DUCE.MultiChannelResource();
 
        internal const FillRule c_FillRule = FillRule.EvenOdd; 
        internal static GeometryCollection s_Children = GeometryCollection.Empty;
 
        #endregion Internal Fields


 
        #region Constructors
 
        //------------------------------------------------------ 
        //
        //  Constructors 
        //
        //-----------------------------------------------------

        static GeometryGroup() 
        {
            // We check our static default fields which are of type Freezable 
            // to make sure that they are not mutable, otherwise we will throw 
            // if these get touched by more than one thread in the lifetime
            // of your app.  (Windows OS Bug #947272) 
            //
            Debug.Assert(s_Children == null || s_Children.IsFrozen,
                "Detected context bound default value GeometryGroup.s_Children (See OS Bug #947272).");
 

            // Initializations 
            Type typeofThis = typeof(GeometryGroup); 
            FillRuleProperty =
                  RegisterProperty("FillRule", 
                                   typeof(FillRule),
                                   typeofThis,
                                   FillRule.EvenOdd,
                                   new PropertyChangedCallback(FillRulePropertyChanged), 
                                   new ValidateValueCallback(System.Windows.Media.ValidateEnums.IsFillRuleValid),
                                   /* isIndependentlyAnimated  = */ false, 
                                   /* coerceValueCallback */ null); 
            ChildrenProperty =
                  RegisterProperty("Children", 
                                   typeof(GeometryCollection),
                                   typeofThis,
                                   new FreezableDefaultValueFactory(GeometryCollection.Empty),
                                   new PropertyChangedCallback(ChildrenPropertyChanged), 
                                   null,
                                   /* isIndependentlyAnimated  = */ false, 
                                   /* coerceValueCallback */ null); 
        }
 


        #endregion Constructors
 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
                        

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