internal Enumerator(MaterialCollection list)
{
Debug.Assert(list != null, "list may not be null.");
_list = list;
_version = list._version;
_index = -1;
_current = default(Material);
}
/// <summary>
/// Implementation of Freezable.GetCurrentValueAsFrozenCore()
/// </summary>
protected override void GetCurrentValueAsFrozenCore(Freezable source)
{
MaterialCollection sourceMaterialCollection = (MaterialCollection)source;
base.GetCurrentValueAsFrozenCore(source);
int count = sourceMaterialCollection._collection.Count;
_collection = new FrugalStructList <Material>(count);
for (int i = 0; i < count; i++)
{
Material newValue = (Material)sourceMaterialCollection._collection[i].GetCurrentValueAsFrozen();
OnFreezablePropertyChanged(/* oldValue = */ null, newValue);
_collection.Add(newValue);
OnInsert(newValue);
}
}
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
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
MaterialCollection vChildren = Children;
// 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_MATERIALGROUP data;
unsafe
{
data.Type = MILCMD.MilCmdMaterialGroup;
data.Handle = _duceResource.GetHandle(channel);
data.ChildrenSize = (uint)(sizeof(DUCE.ResourceHandle) * ChildrenCount);
channel.BeginCommand(
(byte *)&data,
sizeof(DUCE.MILCMD_MATERIALGROUP),
(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 void ReleaseOnChannelCore(DUCE.Channel channel)
{
Debug.Assert(_duceResource.IsOnChannel(channel));
if (_duceResource.ReleaseOnChannel(channel))
{
MaterialCollection 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 AddRefOnChannelCore(DUCE.Channel channel)
{
if (_duceResource.CreateOrAddRefOnChannel(this, channel, System.Windows.Media.Composition.DUCE.ResourceType.TYPE_MATERIALGROUP))
{
MaterialCollection 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));
}
//------------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
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;
}
MaterialGroup target = ((MaterialGroup)d);
// If this is both non-null and mutable, we need to unhook the Changed event.
MaterialCollection oldCollection = null;
MaterialCollection newCollection = null;
if ((e.OldValueSource != BaseValueSourceInternal.Default) || e.IsOldValueModified)
{
oldCollection = (MaterialCollection)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 = (MaterialCollection)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);
}
/// <summary>
/// Replaces any instances of the sentinal brush with the internal brush
/// </summary>
/// <param name="material">The material to look through</param>
private void SwapInCyclicBrush(Material material)
{
int numMaterialsSwapped = 0;
Stack <Material> materialStack = new Stack <Material>();
materialStack.Push(material);
Brush internalBrush = (CacheMode as BitmapCache != null) ? (Brush)InternalBitmapCacheBrush : (Brush)InternalVisualBrush;
while (materialStack.Count > 0)
{
Material currMaterial = materialStack.Pop();
if (currMaterial is DiffuseMaterial)
{
DiffuseMaterial diffMaterial = (DiffuseMaterial)currMaterial;
if ((Boolean)diffMaterial.GetValue(Viewport2DVisual3D.IsVisualHostMaterialProperty))
{
diffMaterial.Brush = internalBrush;
numMaterialsSwapped++;
}
}
else if (currMaterial is EmissiveMaterial)
{
EmissiveMaterial emmMaterial = (EmissiveMaterial)currMaterial;
if ((Boolean)emmMaterial.GetValue(Viewport2DVisual3D.IsVisualHostMaterialProperty))
{
emmMaterial.Brush = internalBrush;
numMaterialsSwapped++;
}
}
else if (currMaterial is SpecularMaterial)
{
SpecularMaterial specMaterial = (SpecularMaterial)currMaterial;
if ((Boolean)specMaterial.GetValue(Viewport2DVisual3D.IsVisualHostMaterialProperty))
{
specMaterial.Brush = internalBrush;
numMaterialsSwapped++;
}
}
else if (currMaterial is MaterialGroup)
{
MaterialGroup matGroup = (MaterialGroup)currMaterial;
// the IsVisualHostMaterialProperty should not be set on a MaterialGroup - verify that
if ((Boolean)matGroup.GetValue(Viewport2DVisual3D.IsVisualHostMaterialProperty))
{
throw new ArgumentException(SR.Get(SRID.Viewport2DVisual3D_MaterialGroupIsInteractiveMaterial), "material");
}
// iterate over the children and put them on the stack of materials to modify
MaterialCollection children = matGroup.Children;
if (children != null)
{
for (int i = 0, count = children.Count; i < count; i++)
{
Material m = children[i];
materialStack.Push(m);
}
}
}
else
{
Invariant.Assert(true, "Unexpected Material type encountered. V2DV3D handles DiffuseMaterial, EmissiveMaterial, SpecularMaterial, and MaterialGroup.");
}
}
// throw if there is more than 1 interactive material
if (numMaterialsSwapped > 1)
{
throw new ArgumentException(SR.Get(SRID.Viewport2DVisual3D_MultipleInteractiveMaterials), "material");
}
}