internal void CreateChannels()
{
Invariant.Assert(_asyncChannel == null);
Invariant.Assert(_asyncOutOfBandChannel == null);
// Create a channel into the async composition device.
// Pass in a reference to the global mediasystem channel so that it uses
// the same partition.
_asyncChannel = new DUCE.Channel(
System.Windows.Media.MediaSystem.ServiceChannel,
false, // not out of band
System.Windows.Media.MediaSystem.Connection,
false // [....] transport
);
_asyncOutOfBandChannel = new DUCE.Channel(
System.Windows.Media.MediaSystem.ServiceChannel,
true, // out of band
System.Windows.Media.MediaSystem.Connection,
false // [....] transport
);
}
internal abstract DUCE.ResourceHandle GetHandleCore(DUCE.Channel channel);
//------------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
#region Public Properties
#endregion Public Properties
//------------------------------------------------------
//
// Protected Methods
//
//------------------------------------------------------
#region Protected Methods
#endregion ProtectedMethods
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
internal abstract DUCE.ResourceHandle AddRefOnChannelCore(DUCE.Channel channel);
protected abstract void UpdateResourceCore(DUCE.Channel channel);
/// <summary>
/// This is only implemented by Visual and Visual3D.
/// </summary>
DUCE.ResourceHandle DUCE.IResource.Get3DHandle(DUCE.Channel channel)
{
throw new NotImplementedException();
}
//------------------------------------------------------
//
// 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
Transform3D vTransform = Transform;
// Obtain handles for properties that implement DUCE.IResource
DUCE.ResourceHandle hTransform;
if (vTransform == null ||
Object.ReferenceEquals(vTransform, Transform3D.Identity)
)
{
hTransform = DUCE.ResourceHandle.Null;
}
else
{
hTransform = ((DUCE.IResource)vTransform).GetHandle(channel);
}
// Obtain handles for animated properties
DUCE.ResourceHandle hNearPlaneDistanceAnimations = GetAnimationResourceHandle(NearPlaneDistanceProperty, channel);
DUCE.ResourceHandle hFarPlaneDistanceAnimations = GetAnimationResourceHandle(FarPlaneDistanceProperty, channel);
DUCE.ResourceHandle hPositionAnimations = GetAnimationResourceHandle(PositionProperty, channel);
DUCE.ResourceHandle hLookDirectionAnimations = GetAnimationResourceHandle(LookDirectionProperty, channel);
DUCE.ResourceHandle hUpDirectionAnimations = GetAnimationResourceHandle(UpDirectionProperty, channel);
DUCE.ResourceHandle hWidthAnimations = GetAnimationResourceHandle(WidthProperty, channel);
// Pack & send command packet
DUCE.MILCMD_ORTHOGRAPHICCAMERA data;
unsafe
{
data.Type = MILCMD.MilCmdOrthographicCamera;
data.Handle = _duceResource.GetHandle(channel);
data.htransform = hTransform;
if (hNearPlaneDistanceAnimations.IsNull)
{
data.nearPlaneDistance = NearPlaneDistance;
}
data.hNearPlaneDistanceAnimations = hNearPlaneDistanceAnimations;
if (hFarPlaneDistanceAnimations.IsNull)
{
data.farPlaneDistance = FarPlaneDistance;
}
data.hFarPlaneDistanceAnimations = hFarPlaneDistanceAnimations;
if (hPositionAnimations.IsNull)
{
data.position = CompositionResourceManager.Point3DToMilPoint3F(Position);
}
data.hPositionAnimations = hPositionAnimations;
if (hLookDirectionAnimations.IsNull)
{
data.lookDirection = CompositionResourceManager.Vector3DToMilPoint3F(LookDirection);
}
data.hLookDirectionAnimations = hLookDirectionAnimations;
if (hUpDirectionAnimations.IsNull)
{
data.upDirection = CompositionResourceManager.Vector3DToMilPoint3F(UpDirection);
}
data.hUpDirectionAnimations = hUpDirectionAnimations;
if (hWidthAnimations.IsNull)
{
data.width = Width;
}
data.hWidthAnimations = hWidthAnimations;
// Send packed command structure
channel.SendCommand(
(byte *)&data,
sizeof(DUCE.MILCMD_ORTHOGRAPHICCAMERA));
}
}
}
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
Transform3D vTransform = Transform;
// Obtain handles for properties that implement DUCE.IResource
DUCE.ResourceHandle hTransform;
if (vTransform == null ||
Object.ReferenceEquals(vTransform, Transform3D.Identity)
)
{
hTransform = DUCE.ResourceHandle.Null;
}
else
{
hTransform = ((DUCE.IResource)vTransform).GetHandle(channel);
}
// Obtain handles for animated properties
DUCE.ResourceHandle hColorAnimations = GetAnimationResourceHandle(ColorProperty, channel);
DUCE.ResourceHandle hPositionAnimations = GetAnimationResourceHandle(PositionProperty, channel);
DUCE.ResourceHandle hRangeAnimations = GetAnimationResourceHandle(RangeProperty, channel);
DUCE.ResourceHandle hConstantAttenuationAnimations = GetAnimationResourceHandle(ConstantAttenuationProperty, channel);
DUCE.ResourceHandle hLinearAttenuationAnimations = GetAnimationResourceHandle(LinearAttenuationProperty, channel);
DUCE.ResourceHandle hQuadraticAttenuationAnimations = GetAnimationResourceHandle(QuadraticAttenuationProperty, channel);
DUCE.ResourceHandle hDirectionAnimations = GetAnimationResourceHandle(DirectionProperty, channel);
DUCE.ResourceHandle hOuterConeAngleAnimations = GetAnimationResourceHandle(OuterConeAngleProperty, channel);
DUCE.ResourceHandle hInnerConeAngleAnimations = GetAnimationResourceHandle(InnerConeAngleProperty, channel);
// Pack & send command packet
DUCE.MILCMD_SPOTLIGHT data;
unsafe
{
data.Type = MILCMD.MilCmdSpotLight;
data.Handle = _duceResource.GetHandle(channel);
data.htransform = hTransform;
if (hColorAnimations.IsNull)
{
data.color = CompositionResourceManager.ColorToMilColorF(Color);
}
data.hColorAnimations = hColorAnimations;
if (hPositionAnimations.IsNull)
{
data.position = CompositionResourceManager.Point3DToMilPoint3F(Position);
}
data.hPositionAnimations = hPositionAnimations;
if (hRangeAnimations.IsNull)
{
data.range = Range;
}
data.hRangeAnimations = hRangeAnimations;
if (hConstantAttenuationAnimations.IsNull)
{
data.constantAttenuation = ConstantAttenuation;
}
data.hConstantAttenuationAnimations = hConstantAttenuationAnimations;
if (hLinearAttenuationAnimations.IsNull)
{
data.linearAttenuation = LinearAttenuation;
}
data.hLinearAttenuationAnimations = hLinearAttenuationAnimations;
if (hQuadraticAttenuationAnimations.IsNull)
{
data.quadraticAttenuation = QuadraticAttenuation;
}
data.hQuadraticAttenuationAnimations = hQuadraticAttenuationAnimations;
if (hDirectionAnimations.IsNull)
{
data.direction = CompositionResourceManager.Vector3DToMilPoint3F(Direction);
}
data.hDirectionAnimations = hDirectionAnimations;
if (hOuterConeAngleAnimations.IsNull)
{
data.outerConeAngle = OuterConeAngle;
}
data.hOuterConeAngleAnimations = hOuterConeAngleAnimations;
if (hInnerConeAngleAnimations.IsNull)
{
data.innerConeAngle = InnerConeAngle;
}
data.hInnerConeAngleAnimations = hInnerConeAngleAnimations;
// Send packed command structure
channel.SendCommand(
(byte *)&data,
sizeof(DUCE.MILCMD_SPOTLIGHT));
}
}
}
internal DUCE.ResourceHandle GetAnimationResourceHandle(DependencyProperty dp, DUCE.Channel channel)
{
if (channel != null && IAnimatable_HasAnimatedProperties)
{
return(IndependentAnimationStorage.GetResourceHandle(this, dp, channel));
}
else
{
return(DUCE.ResourceHandle.Null);
}
}
//------------------------------------------------------
//
// 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
Transform vTransform = Transform;
Transform vRelativeTransform = RelativeTransform;
BitmapCache vBitmapCache = BitmapCache;
Visual vInternalTarget = InternalTarget;
// 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);
}
DUCE.ResourceHandle hRelativeTransform;
if (vRelativeTransform == null ||
Object.ReferenceEquals(vRelativeTransform, Transform.Identity)
)
{
hRelativeTransform = DUCE.ResourceHandle.Null;
}
else
{
hRelativeTransform = ((DUCE.IResource)vRelativeTransform).GetHandle(channel);
}
DUCE.ResourceHandle hBitmapCache = vBitmapCache != null ? ((DUCE.IResource)vBitmapCache).GetHandle(channel) : DUCE.ResourceHandle.Null;
// Obtain handles for properties that implement DUCE.IResource
DUCE.ResourceHandle hInternalTarget = vInternalTarget != null ? ((DUCE.IResource)vInternalTarget).GetHandle(channel) : DUCE.ResourceHandle.Null;
// Obtain handles for animated properties
DUCE.ResourceHandle hOpacityAnimations = GetAnimationResourceHandle(OpacityProperty, channel);
// Pack & send command packet
DUCE.MILCMD_BITMAPCACHEBRUSH data;
unsafe
{
data.Type = MILCMD.MilCmdBitmapCacheBrush;
data.Handle = _duceResource.GetHandle(channel);
if (hOpacityAnimations.IsNull)
{
data.Opacity = Opacity;
}
data.hOpacityAnimations = hOpacityAnimations;
data.hTransform = hTransform;
data.hRelativeTransform = hRelativeTransform;
data.hBitmapCache = hBitmapCache;
data.hInternalTarget = hInternalTarget;
// Send packed command structure
channel.SendCommand(
(byte *)&data,
sizeof(DUCE.MILCMD_BITMAPCACHEBRUSH));
}
}
}
public void Invalidate(Int32Rect?dirtyRect)
{
SecurityHelper.DemandUnmanagedCode();
// A null dirty rect indicates the entire bitmap should be
// invalidated, while a value indicates that only a dirty rect
// should be invalidated.
if (dirtyRect.HasValue)
{
dirtyRect.Value.ValidateForDirtyRect("dirtyRect", _pixelWidth, _pixelHeight);
if (!dirtyRect.Value.HasArea)
{
// Nothing needs done.
return;
}
}
WritePreamble();
if (_unmanagedSource != null)
{
if (UsableWithoutCache)
{
// For bitmap sources that do not require caching on the
// UI thread, we can just add a dirty rect to the
// CWICWrapperBitmap. The render thread will respond by
// updating the affected realizations by copying from this
// bitmap. Since this bitmap is not cached, it will get
// the most current bits.
unsafe
{
for (int i = 0, numChannels = _duceResource.GetChannelCount(); i < numChannels; ++i)
{
DUCE.Channel channel = _duceResource.GetChannel(i);
DUCE.MILCMD_BITMAP_INVALIDATE data;
data.Type = MILCMD.MilCmdBitmapInvalidate;
data.Handle = _duceResource.GetHandle(channel);
bool useDirtyRect = dirtyRect.HasValue;
if (useDirtyRect)
{
data.DirtyRect.left = dirtyRect.Value.X;
data.DirtyRect.top = dirtyRect.Value.Y;
data.DirtyRect.right = dirtyRect.Value.X + dirtyRect.Value.Width;
data.DirtyRect.bottom = dirtyRect.Value.Y + dirtyRect.Value.Height;
}
data.UseDirtyRect = (uint)(useDirtyRect ? 1 : 0);
channel.SendCommand((byte *)&data, sizeof(DUCE.MILCMD_BITMAP_INVALIDATE));
}
}
}
else
{
// For bitmap sources that require caching on the
// UI thread, we can't just add a dirty rect to the
// CWICWrapperBitmap because it will just read the cached
// contents again. We really need a caching bitmap
// implementation that understands dirty rects and will
// update its cache. Unfortunately, today the caching
// bitmap is a standard WIC implementation, and does not
// support this functionality.
//
// For now, we just recreate the caching bitmap. Setting
// _needsUpdate to true will cause BitmapSource to throw
// away the old DUCECompatiblePtr, and create a new caching
// bitmap to send to the render thread. Since the render
// thread sees a brand new bitmap, it will copy the bits out.
_needsUpdate = true;
RegisterForAsyncUpdateResource();
}
}
WritePostscript();
}
private void SendPresent(object sender, EventArgs args)
{
Debug.Assert(_isDirty);
Debug.Assert(_isWaitingForPresent);
Debug.Assert(_lockCount == 0);
//
// If we were waiting for present when the bitmap changed, SetBackBuffer removed
// us from waiting for present. So if this is true then the NEW bitmap has been
// dirtied before it has been sent to the render thread. We need to delay the
// present until after the update resource because the D3DImage resource is still
// referencing the old bitmap.
//
if (_waitingForUpdateResourceBecauseBitmapChanged)
{
return;
}
UnsubscribeFromCommittingBatch();
unsafe
{
DUCE.MILCMD_D3DIMAGE_PRESENT data;
DUCE.Channel channel = sender as DUCE.Channel;
Debug.Assert(_duceResource.IsOnChannel(channel));
data.Type = MILCMD.MilCmdD3DImagePresent;
data.Handle = _duceResource.GetHandle(channel);
// We need to make sure the event stays alive in case we get collected before
// the composition thread processes the packet
IntPtr hDuplicate;
IntPtr hCurrentProc = MS.Win32.UnsafeNativeMethods.GetCurrentProcess();
if (!MS.Win32.UnsafeNativeMethods.DuplicateHandle(
hCurrentProc,
_canWriteEvent.SafeWaitHandle,
hCurrentProc,
out hDuplicate,
0,
false,
MS.Win32.UnsafeNativeMethods.DUPLICATE_SAME_ACCESS
))
{
throw new Win32Exception();
}
data.hEvent = (ulong)hDuplicate.ToPointer();
// Send packed command structure
// Note that the command is sent in its own batch (sendInSeparateBatch == true) because this method is called under the
// context of the MediaContext.CommitChannel and the command needs to make it into the current set of changes which are
// being commited to the compositor. If the command would not be added to a separate batch, it would go into the
// "future" batch which would not get submitted this time around. This leads to a dead-lock situation which occurs when
// the app calls Lock on the D3DImage because Lock waits on _canWriteEvent which the compositor sets when it sees the
// Present command. However, since the compositor does not get the Present command, it will not set the event and the
// UI thread will wait forever on the compositor which will cause the application to stop responding.
channel.SendCommand(
(byte *)&data,
sizeof(DUCE.MILCMD_D3DIMAGE_PRESENT),
true /* sendInSeparateBatch */
);
}
_isDirty = false;
// Block on next Lock
_canWriteEvent.Reset();
}
/// <summary>
/// This should be called at the end of any method that alters the
/// storage in any way. This method will make sure the peer dp is
/// set correctly and notify Animatables if something changes.
/// </summary>
internal void WritePostscript()
{
DependencyObject d = (DependencyObject)_dependencyObject.Target;
if (d == null)
{
return;
}
FrugalMap animatedPropertyMap = AnimatedPropertyMapField.GetValue(d);
if (animatedPropertyMap.Count == 0 ||
animatedPropertyMap[_dependencyProperty.GlobalIndex] == DependencyProperty.UnsetValue)
{
if (!IsEmpty)
{
// This is kind of tricky:
//
// Because FrugalMap is a struct instead of a class, we must
// be sure to add this AnimationStorage to the map before
// setting the FrugalMap into the UncommonField storage. If
// we don't and the FrugalMap is empty then an empty FrugalMap
// will be set into the UncommonField storage. If we were to
// then add our AnimationStorage to the local FrugalMap, it
// would only allocate its own internal storage at that point
// which would not apply to the FrugalMap we set into the
// UncommonField storage. Once a FrugalMap has allocated its
// internal storage, though, that storage is copied with the
// FrugalMap. This is what will happen when we add our
// AnimationStorage to the FrugalMap first as we do below:
animatedPropertyMap[_dependencyProperty.GlobalIndex] = this;
// Since FrugalMap is a struct and adding a new value to it
// may re-allocate the storage, we need to set this value
// each time we make a change to the map.
AnimatedPropertyMapField.SetValue(d, animatedPropertyMap);
if (animatedPropertyMap.Count == 1)
{
d.IAnimatable_HasAnimatedProperties = true;
}
// If this the target is an Animatable we'll need to
// invalidate it so that the animation resource for this
// newly animated property will be passed across to the UCE.
Animatable a = d as Animatable;
if (a != null)
{
a.RegisterForAsyncUpdateResource();
}
// If this AnimationStorage is a resource, add it to the
// channel now.
DUCE.IResource animationResource = this as DUCE.IResource;
if (animationResource != null)
{
DUCE.IResource targetResource = d as DUCE.IResource;
if (targetResource != null)
{
using (CompositionEngineLock.Acquire())
{
int channelCount = targetResource.GetChannelCount();
for (int i = 0; i < channelCount; i++)
{
DUCE.Channel channel = targetResource.GetChannel(i);
if (!targetResource.GetHandle(channel).IsNull)
{
animationResource.AddRefOnChannel(channel);
}
}
}
}
}
}
}
else
{
Debug.Assert(animatedPropertyMap.Count > 0);
Debug.Assert(animatedPropertyMap[_dependencyProperty.GlobalIndex] != DependencyProperty.UnsetValue);
if (IsEmpty)
{
// If this AnimationStorage is a resource, release it from
// the channel now.
DUCE.IResource animationResource = this as DUCE.IResource;
if (animationResource != null)
{
DUCE.IResource targetResource = d as DUCE.IResource;
if (targetResource != null)
{
using (CompositionEngineLock.Acquire())
{
int channelCount = targetResource.GetChannelCount();
for (int i = 0; i < channelCount; i++)
{
DUCE.Channel channel = targetResource.GetChannel(i);
if (!targetResource.GetHandle(channel).IsNull)
{
animationResource.ReleaseOnChannel(channel);
}
}
}
}
}
// If this the target is an Animatable we'll need to
// invalidate it so that the animation resource for this
// no longer animated property will no longer be passed
// across to the UCE.
Animatable a = d as Animatable;
if (a != null)
{
a.RegisterForAsyncUpdateResource();
}
animatedPropertyMap[_dependencyProperty.GlobalIndex] = DependencyProperty.UnsetValue;
if (animatedPropertyMap.Count == 0)
{
AnimatedPropertyMapField.ClearValue(d);
d.IAnimatable_HasAnimatedProperties = false;
}
else
{
AnimatedPropertyMapField.SetValue(d, animatedPropertyMap);
}
// We've removed animation storage for this DP, so if we were storing the local
// base value here then it has to go back to its non-animated storage spot.
if (_baseValue != DependencyProperty.UnsetValue)
{
d.SetValue(_dependencyProperty, _baseValue);
}
}
}
// recompute animated value
d.InvalidateProperty(_dependencyProperty);
}
//------------------------------------------------------
//
// 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
Point3DCollection vPositions = Positions;
Vector3DCollection vNormals = Normals;
PointCollection vTextureCoordinates = TextureCoordinates;
Int32Collection vTriangleIndices = TriangleIndices;
// Store the count of this resource's contained collections in local variables.
int PositionsCount = (vPositions == null) ? 0 : vPositions.Count;
int NormalsCount = (vNormals == null) ? 0 : vNormals.Count;
int TextureCoordinatesCount = (vTextureCoordinates == null) ? 0 : vTextureCoordinates.Count;
int TriangleIndicesCount = (vTriangleIndices == null) ? 0 : vTriangleIndices.Count;
// Pack & send command packet
DUCE.MILCMD_MESHGEOMETRY3D data;
unsafe
{
data.Type = MILCMD.MilCmdMeshGeometry3D;
data.Handle = _duceResource.GetHandle(channel);
data.PositionsSize = (uint)(sizeof(MilPoint3F) * PositionsCount);
data.NormalsSize = (uint)(sizeof(MilPoint3F) * NormalsCount);
data.TextureCoordinatesSize = (uint)(sizeof(Point) * TextureCoordinatesCount);
data.TriangleIndicesSize = (uint)(sizeof(Int32) * TriangleIndicesCount);
channel.BeginCommand(
(byte *)&data,
sizeof(DUCE.MILCMD_MESHGEOMETRY3D),
(int)(data.PositionsSize +
data.NormalsSize +
data.TextureCoordinatesSize +
data.TriangleIndicesSize)
);
// Copy this collection's elements (or their handles) to reserved data
for (int i = 0; i < PositionsCount; i++)
{
MilPoint3F resource = CompositionResourceManager.Point3DToMilPoint3F(vPositions.Internal_GetItem(i));
channel.AppendCommandData(
(byte *)&resource,
sizeof(MilPoint3F)
);
}
// Copy this collection's elements (or their handles) to reserved data
for (int i = 0; i < NormalsCount; i++)
{
MilPoint3F resource = CompositionResourceManager.Vector3DToMilPoint3F(vNormals.Internal_GetItem(i));
channel.AppendCommandData(
(byte *)&resource,
sizeof(MilPoint3F)
);
}
// Copy this collection's elements (or their handles) to reserved data
for (int i = 0; i < TextureCoordinatesCount; i++)
{
Point resource = vTextureCoordinates.Internal_GetItem(i);
channel.AppendCommandData(
(byte *)&resource,
sizeof(Point)
);
}
// Copy this collection's elements (or their handles) to reserved data
for (int i = 0; i < TriangleIndicesCount; i++)
{
Int32 resource = vTriangleIndices.Internal_GetItem(i);
channel.AppendCommandData(
(byte *)&resource,
sizeof(Int32)
);
}
channel.EndCommand();
}
}
}
private static void ConnectTransport()
{
if (IsTransportConnected)
{
throw new System.InvalidOperationException(SR.Get(SRID.MediaSystem_OutOfOrderConnectOrDisconnect));
}
//
// Create a default transport to be used by this media system.
// If creation fails, fall back to a local transport.
//
HRESULT.Check(UnsafeNativeMethods.WgxConnection_Create(
false, // false means asynchronous transport
out s_pConnection));
// Create service channel used by global glyph cache. This channel is
// the first channel created for the app, and by creating it with
// a null channel reference it creates a new partition.
// All subsequent channel creates will pass in a reference to this
// channel thus using its partition.
s_serviceChannel = new DUCE.Channel(
null,
false, // not out of band
s_pConnection,
false);
IsTransportConnected = true;
}
internal override DUCE.ResourceHandle GetHandleCore(DUCE.Channel channel)
{
// Note that we are in a lock here already.
return(_duceResource.GetHandle(channel));
}
/// <summary>
/// If the visual is on channel, its reference count is increased.
/// Otherwise, a new resource is created on that channel.
/// </summary>
internal bool CreateOrAddRefOnChannel(
object instance,
DUCE.Channel channel,
DUCE.ResourceType resourceType)
{
int index = Find(channel);
int count = Count;
if (index == PROXY_NOT_FOUND)
{
//
// This is the case where we have to create a new resource.
//
if (_head.Channel == null)
{
//
// We're adding the first proxy.
//
// Before: [empty]
// After insert: [ head]
//
Debug.Assert(count == 0);
_head.Channel = channel;
_head.Flags = VisualProxyFlags.None;
channel.CreateOrAddRefOnChannel(
instance,
ref _head.Handle,
resourceType);
}
else
{
if (_tail == null)
{
//
// We're adding the second proxy.
//
// Before: [head]
// After resize: [head] [ empty] [empty]
// After insert: [head] [tail 0] [empty]
// ----------------
Debug.Assert(count == 1);
_tail = new Proxy[2];
}
else if (count > _tail.Length)
{
//
// Increase the tail size by 2.
//
// Before: [head] [tail 0] ... [tail c-2]
// After resize: [head] [tail 0] ... [tail c-2] [ empty] [empty]
// After insert: [head] [tail 0] ... [tail c-3] [tail c-2] [empty]
// ------------------------------------------
//
ResizeTail(2);
}
//
// Now that we have a tail, fill in the first free element.
//
Proxy proxy;
proxy.Channel = channel;
proxy.Flags = VisualProxyFlags.None;
proxy.Handle = DUCE.ResourceHandle.Null;
channel.CreateOrAddRefOnChannel(
instance,
ref proxy.Handle,
resourceType);
_tail[count - 1] = proxy;
}
return /* created */ (true);
}
else if (index == PROXY_STORED_INLINE)
{
//
// We simply need to increase the reference count on head...
//
channel.CreateOrAddRefOnChannel(
instance,
ref _head.Handle,
resourceType);
}
else
{
//
// Increase the reference count on one of the tail proxies...
//
channel.CreateOrAddRefOnChannel(
instance,
ref _tail[index].Handle,
resourceType);
}
return /* not created */ (false);
}
/// <summary>
/// If visual is on channel, its reference count is increased.
/// Otherwise, a new resource is created on that channel.
/// </summary>
internal bool ReleaseOnChannel(DUCE.Channel channel)
{
int index = Find(channel);
bool proxyRemoved = false;
int count = Count;
if (index == PROXY_STORED_INLINE)
{
if (channel.ReleaseOnChannel(_head.Handle))
{
//
// Need to move the last of the non-empty tail to head
// or clear the head. Erase the head if that was the last
// proxy.
//
if (count == 1)
{
_head = new Proxy();
}
else
{
_head = _tail[count - 2];
}
proxyRemoved = true;
}
}
else if (index >= 0)
{
if (channel.ReleaseOnChannel(_tail[index].Handle))
{
//
// Need to move the last of the non-empty tail to the
// removed index. Avoid in-place copying.
//
if (index != count - 2)
{
_tail[index] = _tail[count - 2];
}
proxyRemoved = true;
}
}
else
{
Debug.Assert(index != PROXY_NOT_FOUND);
return(false);
}
if (proxyRemoved)
{
if (_tail != null)
{
//
// Keep the tail short. We allow for one extra free element
// in tail to avoid constant allocations / reallocations.
//
if (count == 2)
{
// ------------------
// Before removal: [head] [tail c-1] [empty]
// Here and now: [head] [ deleted] [empty]
// After removal: [head]
//
_tail = null;
}
else if (count == _tail.Length)
{
// ---------------------------------------------------
// Before removal: [head] [tail 0] [tail 1] ... [tail c-3] [tail c-2] [empty]
// Here and now: [head] [tail 0] [tail 1] ... [tail c-3] [ deleted] [empty]
// After removal: [head] [tail 0] [tail 1] ... [tail c-3]
//
ResizeTail(-2);
}
else
{
// ------------------------------------------------------
// Before removal: [head] [tail 0] [tail 1] ... [tail c-4] [tail c-3] [tail c-2]
// Here and now: [head] [tail 0] [tail 1] ... [tail c-4] [tail c-3] [ deleted]
// After removal: [head] [tail 0] [tail 1] ... [tail c-4] [tail c-3] [ empty]
//
_tail[count - 2] = new Proxy();
}
}
}
return(proxyRemoved);
}
/// <summary>
/// UpdateResource - this implements the prototype required by ResourcesUpdatedHandler
/// The method which implements this prototype is also often called in situations where
/// the resource is known to be "on channel" - in those cases, "true" is passed for the second
/// parameter (allowing the implementation to skip the check).
/// </summary>
internal virtual void UpdateResource(DUCE.Channel channel, bool skipOnChannelCheck)
{
Animatable_IsResourceInvalidationNecessary = true;
}
// ----------------------------------------------------------------
//
// Internal Methods: resource handle getters
//
// ----------------------------------------------------------------
#region Internal Methods: resource handle getters
/// <summary>
/// Returns the handle the visual has on a specific channel.
/// </summary>
internal DUCE.ResourceHandle GetHandle(DUCE.Channel channel)
{
return(GetHandle(Find(channel) + 1)); // Find's results are -1 based, adjust by one.
}
/// <summary>
/// Render visual to printer.
/// </summary>
/// <param name="visual">Root of the visual to render</param>
/// <param name="worldTransform">World transform to apply to the root visual</param>
/// <param name="windowClip">The window clip of the outermost window or Empty</param>
/// <param name="fRenderForBitmapEffect">True if we are rendering the visual
/// to apply an effect to it</param>
///
internal void Render(Visual visual, Matrix worldTransform, Rect windowClip)
{
if (visual == null)
{
throw new ArgumentNullException("visual");
}
// If the bitmapTarget we're writing to is frozen then we can't proceed. Note that
// it's possible for the BitmapVisualManager to be constructed with a mutable BitmapImage
// and for the app to later freeze it. Such an application is misbehaving if
// they subsequently try to render to the BitmapImage.
if (_bitmapTarget.IsFrozen)
{
throw new ArgumentException(SR.Get(SRID.Image_CantBeFrozen));
}
int sizeX = _bitmapTarget.PixelWidth;
int sizeY = _bitmapTarget.PixelHeight;
double dpiX = _bitmapTarget.DpiX;
double dpiY = _bitmapTarget.DpiY;
Debug.Assert((sizeX > 0) && (sizeY > 0));
Debug.Assert((dpiX > 0) && (dpiY > 0));
// validate the data
if ((sizeX <= 0) || (sizeY <= 0))
{
return; // nothing to draw
}
if ((dpiX <= 0) || (dpiY <= 0))
{
dpiX = 96;
dpiY = 96;
}
SafeMILHandle renderTargetBitmap = _bitmapTarget.MILRenderTarget;
Debug.Assert(renderTargetBitmap != null, "Render Target is null");
IntPtr pIRenderTargetBitmap = IntPtr.Zero;
try
{
//
// Allocate a fresh synchronous channel.
//
MediaContext mctx = MediaContext.CurrentMediaContext;
DUCE.Channel channel = mctx.AllocateSyncChannel();
//
// Acquire the target bitmap.
//
Guid iidRTB = MILGuidData.IID_IMILRenderTargetBitmap;
HRESULT.Check(UnsafeNativeMethods.MILUnknown.QueryInterface(
renderTargetBitmap,
ref iidRTB,
out pIRenderTargetBitmap));
//
// Render the visual on the synchronous channel.
//
Renderer.Render(
pIRenderTargetBitmap,
channel,
visual,
sizeX,
sizeY,
dpiX,
dpiY,
worldTransform,
windowClip);
//
// Release the synchronous channel. This way we can
// re-use that channel later.
//
mctx.ReleaseSyncChannel(channel);
}
finally
{
UnsafeNativeMethods.MILUnknown.ReleaseInterface(ref pIRenderTargetBitmap);
}
_bitmapTarget.RenderTargetContentsChanged();
}
// ----------------------------------------------------------------
//
// Internal Methods: visual proxy flags
//
// ----------------------------------------------------------------
#region Internal Methods: visual proxy flags
/// <summary>
/// Returns the flags the visual has on a specific channel.
/// </summary>
internal VisualProxyFlags GetFlags(DUCE.Channel channel)
{
return(GetFlags(Find(channel) + 1)); // Find's results are -1 based, adjust by one.
}
/// <summary>
/// This is only implemented by Visual and Visual3D.
/// </summary>
void DUCE.IResource.RemoveChildFromParent(DUCE.IResource parent, DUCE.Channel channel)
{
throw new NotImplementedException();
}
//------------------------------------------------------
//
// 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
Transform vTransform = Transform;
Transform vRelativeTransform = RelativeTransform;
Visual vVisual = Visual;
// 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);
}
DUCE.ResourceHandle hRelativeTransform;
if (vRelativeTransform == null ||
Object.ReferenceEquals(vRelativeTransform, Transform.Identity)
)
{
hRelativeTransform = DUCE.ResourceHandle.Null;
}
else
{
hRelativeTransform = ((DUCE.IResource)vRelativeTransform).GetHandle(channel);
}
// Obtain handles for properties that implement DUCE.IResource
DUCE.ResourceHandle hVisual = vVisual != null ? ((DUCE.IResource)vVisual).GetHandle(channel) : DUCE.ResourceHandle.Null;
// Obtain handles for animated properties
DUCE.ResourceHandle hOpacityAnimations = GetAnimationResourceHandle(OpacityProperty, channel);
DUCE.ResourceHandle hViewportAnimations = GetAnimationResourceHandle(ViewportProperty, channel);
DUCE.ResourceHandle hViewboxAnimations = GetAnimationResourceHandle(ViewboxProperty, channel);
// Pack & send command packet
DUCE.MILCMD_VISUALBRUSH data;
unsafe
{
data.Type = MILCMD.MilCmdVisualBrush;
data.Handle = _duceResource.GetHandle(channel);
if (hOpacityAnimations.IsNull)
{
data.Opacity = Opacity;
}
data.hOpacityAnimations = hOpacityAnimations;
data.hTransform = hTransform;
data.hRelativeTransform = hRelativeTransform;
data.ViewportUnits = ViewportUnits;
data.ViewboxUnits = ViewboxUnits;
if (hViewportAnimations.IsNull)
{
data.Viewport = Viewport;
}
data.hViewportAnimations = hViewportAnimations;
if (hViewboxAnimations.IsNull)
{
data.Viewbox = Viewbox;
}
data.hViewboxAnimations = hViewboxAnimations;
data.Stretch = Stretch;
data.TileMode = TileMode;
data.AlignmentX = AlignmentX;
data.AlignmentY = AlignmentY;
data.CachingHint = (CachingHint)GetValue(RenderOptions.CachingHintProperty);
data.CacheInvalidationThresholdMinimum = (double)GetValue(RenderOptions.CacheInvalidationThresholdMinimumProperty);
data.CacheInvalidationThresholdMaximum = (double)GetValue(RenderOptions.CacheInvalidationThresholdMaximumProperty);
data.hVisual = hVisual;
// Send packed command structure
channel.SendCommand(
(byte *)&data,
sizeof(DUCE.MILCMD_VISUALBRUSH));
}
}
}
internal static DUCE.ResourceHandle GetResourceHandle(DependencyObject d, DependencyProperty dp, DUCE.Channel channel)
{
Debug.Assert(d != null);
Debug.Assert(dp != null);
Debug.Assert(d is Animatable ? ((Animatable)d).HasAnimatedProperties : true);
IndependentAnimationStorage storage = AnimationStorage.GetStorage(d, dp) as IndependentAnimationStorage;
if (storage == null)
{
return(DUCE.ResourceHandle.Null);
}
else
{
Debug.Assert(storage._duceResource.IsOnChannel(channel));
return(((DUCE.IResource)storage).GetHandle(channel));
}
}
private void ManualUpdateResource(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))
{
Transform vTransform = Transform;
Transform vRelativeTransform = RelativeTransform;
GradientStopCollection vGradientStops = GradientStops;
DUCE.ResourceHandle hTransform;
if (vTransform == null ||
Object.ReferenceEquals(vTransform, Transform.Identity)
)
{
hTransform = DUCE.ResourceHandle.Null;
}
else
{
hTransform = ((DUCE.IResource)vTransform).GetHandle(channel);
}
DUCE.ResourceHandle hRelativeTransform;
if (vRelativeTransform == null ||
Object.ReferenceEquals(vRelativeTransform, Transform.Identity)
)
{
hRelativeTransform = DUCE.ResourceHandle.Null;
}
else
{
hRelativeTransform = ((DUCE.IResource)vRelativeTransform).GetHandle(channel);
}
DUCE.ResourceHandle hOpacityAnimations = GetAnimationResourceHandle(OpacityProperty, channel);
DUCE.ResourceHandle hCenterAnimations = GetAnimationResourceHandle(CenterProperty, channel);
DUCE.ResourceHandle hRadiusXAnimations = GetAnimationResourceHandle(RadiusXProperty, channel);
DUCE.ResourceHandle hRadiusYAnimations = GetAnimationResourceHandle(RadiusYProperty, channel);
DUCE.ResourceHandle hGradientOriginAnimations = GetAnimationResourceHandle(GradientOriginProperty, channel);
DUCE.MILCMD_RADIALGRADIENTBRUSH data;
unsafe
{
data.Type = MILCMD.MilCmdRadialGradientBrush;
data.Handle = _duceResource.GetHandle(channel);
double tempOpacity = Opacity;
DUCE.CopyBytes((byte *)&data.Opacity, (byte *)&tempOpacity, 8);
data.hOpacityAnimations = hOpacityAnimations;
data.hTransform = hTransform;
data.hRelativeTransform = hRelativeTransform;
data.ColorInterpolationMode = ColorInterpolationMode;
data.MappingMode = MappingMode;
data.SpreadMethod = SpreadMethod;
Point tempCenter = Center;
DUCE.CopyBytes((byte *)&data.Center, (byte *)&tempCenter, 16);
data.hCenterAnimations = hCenterAnimations;
double tempRadiusX = RadiusX;
DUCE.CopyBytes((byte *)&data.RadiusX, (byte *)&tempRadiusX, 8);
data.hRadiusXAnimations = hRadiusXAnimations;
double tempRadiusY = RadiusY;
DUCE.CopyBytes((byte *)&data.RadiusY, (byte *)&tempRadiusY, 8);
data.hRadiusYAnimations = hRadiusYAnimations;
Point tempGradientOrigin = GradientOrigin;
DUCE.CopyBytes((byte *)&data.GradientOrigin, (byte *)&tempGradientOrigin, 16);
data.hGradientOriginAnimations = hGradientOriginAnimations;
// NTRAID#Longhorn-1011154-2004/8/12-asecchia GradientStopCollection: Need to enforce upper-limit of gradient stop capacity
int count = (vGradientStops == null) ? 0 : vGradientStops.Count;
data.GradientStopsSize = (UInt32)(sizeof(DUCE.MIL_GRADIENTSTOP) * count);
channel.BeginCommand(
(byte *)&data,
sizeof(DUCE.MILCMD_RADIALGRADIENTBRUSH),
sizeof(DUCE.MIL_GRADIENTSTOP) * count
);
for (int i = 0; i < count; i++)
{
DUCE.MIL_GRADIENTSTOP stopCmd;
GradientStop gradStop = vGradientStops.Internal_GetItem(i);
double temp = gradStop.Offset;
DUCE.CopyBytes((byte *)&stopCmd.Position, (byte *)&temp, sizeof(double));
stopCmd.Color = CompositionResourceManager.ColorToMilColorF(gradStop.Color);
channel.AppendCommandData(
(byte *)&stopCmd,
sizeof(DUCE.MIL_GRADIENTSTOP)
);
}
channel.EndCommand();
}
}
}
internal override void UpdateResource(DUCE.Channel channel, bool skipOnChannelCheck)
{
ManualUpdateResource(channel, skipOnChannelCheck);
base.UpdateResource(channel, skipOnChannelCheck);
}
//------------------------------------------------------
//
// 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);
// Obtain handles for animated properties
DUCE.ResourceHandle hScaleXAnimations = GetAnimationResourceHandle(ScaleXProperty, channel);
DUCE.ResourceHandle hScaleYAnimations = GetAnimationResourceHandle(ScaleYProperty, channel);
DUCE.ResourceHandle hScaleZAnimations = GetAnimationResourceHandle(ScaleZProperty, channel);
DUCE.ResourceHandle hCenterXAnimations = GetAnimationResourceHandle(CenterXProperty, channel);
DUCE.ResourceHandle hCenterYAnimations = GetAnimationResourceHandle(CenterYProperty, channel);
DUCE.ResourceHandle hCenterZAnimations = GetAnimationResourceHandle(CenterZProperty, channel);
// Pack & send command packet
DUCE.MILCMD_SCALETRANSFORM3D data;
unsafe
{
data.Type = MILCMD.MilCmdScaleTransform3D;
data.Handle = _duceResource.GetHandle(channel);
if (hScaleXAnimations.IsNull)
{
data.scaleX = ScaleX;
}
data.hScaleXAnimations = hScaleXAnimations;
if (hScaleYAnimations.IsNull)
{
data.scaleY = ScaleY;
}
data.hScaleYAnimations = hScaleYAnimations;
if (hScaleZAnimations.IsNull)
{
data.scaleZ = ScaleZ;
}
data.hScaleZAnimations = hScaleZAnimations;
if (hCenterXAnimations.IsNull)
{
data.centerX = CenterX;
}
data.hCenterXAnimations = hCenterXAnimations;
if (hCenterYAnimations.IsNull)
{
data.centerY = CenterY;
}
data.hCenterYAnimations = hCenterYAnimations;
if (hCenterZAnimations.IsNull)
{
data.centerZ = CenterZ;
}
data.hCenterZAnimations = hCenterZAnimations;
// Send packed command structure
channel.SendCommand(
(byte *)&data,
sizeof(DUCE.MILCMD_SCALETRANSFORM3D));
}
}
}
internal abstract void ReleaseOnChannelCore(DUCE.Channel channel);
/// <summary>
/// Derived classes implement this function.
/// </summary>
void DUCE.IResource.ReleaseOnChannel(DUCE.Channel channel)
{
// Just return instead of throwing an exception, since some
// derived classes like BitmapEffect do their own addref/release.
}
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
DrawingCollection vChildren = Children;
Geometry vClipGeometry = ClipGeometry;
Brush vOpacityMask = OpacityMask;
Transform vTransform = Transform;
GuidelineSet vGuidelineSet = GuidelineSet;
// Obtain handles for properties that implement DUCE.IResource
DUCE.ResourceHandle hClipGeometry = vClipGeometry != null ? ((DUCE.IResource)vClipGeometry).GetHandle(channel) : DUCE.ResourceHandle.Null;
DUCE.ResourceHandle hOpacityMask = vOpacityMask != null ? ((DUCE.IResource)vOpacityMask).GetHandle(channel) : DUCE.ResourceHandle.Null;
DUCE.ResourceHandle hTransform;
if (vTransform == null ||
Object.ReferenceEquals(vTransform, Transform.Identity)
)
{
hTransform = DUCE.ResourceHandle.Null;
}
else
{
hTransform = ((DUCE.IResource)vTransform).GetHandle(channel);
}
DUCE.ResourceHandle hGuidelineSet = vGuidelineSet != null ? ((DUCE.IResource)vGuidelineSet).GetHandle(channel) : DUCE.ResourceHandle.Null;
// Obtain handles for animated properties
DUCE.ResourceHandle hOpacityAnimations = GetAnimationResourceHandle(OpacityProperty, 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_DRAWINGGROUP data;
unsafe
{
data.Type = MILCMD.MilCmdDrawingGroup;
data.Handle = _duceResource.GetHandle(channel);
data.ChildrenSize = (uint)(sizeof(DUCE.ResourceHandle) * ChildrenCount);
data.hClipGeometry = hClipGeometry;
if (hOpacityAnimations.IsNull)
{
data.Opacity = Opacity;
}
data.hOpacityAnimations = hOpacityAnimations;
data.hOpacityMask = hOpacityMask;
data.hTransform = hTransform;
data.hGuidelineSet = hGuidelineSet;
data.EdgeMode = (EdgeMode)GetValue(RenderOptions.EdgeModeProperty);
data.bitmapScalingMode = (BitmapScalingMode)GetValue(RenderOptions.BitmapScalingModeProperty);
data.ClearTypeHint = (ClearTypeHint)GetValue(RenderOptions.ClearTypeHintProperty);
channel.BeginCommand(
(byte *)&data,
sizeof(DUCE.MILCMD_DRAWINGGROUP),
(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();
}
}
}
/// <summary>
/// Derived classes implement this function.
/// </summary>
DUCE.ResourceHandle DUCE.IResource.GetHandle(DUCE.Channel channel)
{
// Just return null instead of throwing an exception, since some
// derived classes like BitmapEffect do their own addref/release.
return(DUCE.ResourceHandle.Null);
}
//------------------------------------------------------
//
// 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;
}
DrawingGroup target = ((DrawingGroup)d);
// If this is both non-null and mutable, we need to unhook the Changed event.
DrawingCollection oldCollection = null;
DrawingCollection newCollection = null;
if ((e.OldValueSource != BaseValueSourceInternal.Default) || e.IsOldValueModified)
{
oldCollection = (DrawingCollection)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 = (DrawingCollection)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);
}
internal DUCE.Channel AllocateSyncChannel()
{
DUCE.Channel syncChannel;
if (_pSyncConnection == IntPtr.Zero)
{
HRESULT.Check(UnsafeNativeMethods.WgxConnection_Create(
true, // true means synchronous transport
out _pSyncConnection));
}
if (_freeSyncChannels == null)
{
//
// Ensure the free [....] channels queue...
//
_freeSyncChannels = new Queue<DUCE.Channel>(3);
}
if (_freeSyncChannels.Count > 0)
{
//
// If there is a free [....] channel in the queue, we're done:
//
return _freeSyncChannels.Dequeue();
}
else
{
//
// Otherwise, create a new channel. We will try to cache it
// when the ReleaseSyncChannel call is made. Also ensure the
// synchronous service channel and glyph cache.
//
if (_syncServiceChannel == null)
{
_syncServiceChannel = new DUCE.Channel(
null,
false, // not out of band
_pSyncConnection,
true // synchronous
);
}
syncChannel = new DUCE.Channel(
_syncServiceChannel,
false, // not out of band
_pSyncConnection,
true // synchronous
);
return syncChannel;
}
}