///<summary>
/// Callback method, used for adding a figure to the list
///</summary>
///<param name="isFilled">
/// The figure is filled
///</param>
///<param name="isClosed">
/// The figure is closed
///</param>
///<param name="pPoints">
/// The array of the figure's defining points
///</param>
///<param name="pointCount">
/// The size of the points array
///</param>
///<param name="pSegTypes">
/// The array of the figure's defining segment types
///</param>
///<param name="segmentCount">
/// The size of the types array
///</param>
internal unsafe void AddFigureToList(bool isFilled, bool isClosed, MilPoint2F *pPoints, UInt32 pointCount, byte *pSegTypes, UInt32 segmentCount)
{
if (pointCount >= 1 && segmentCount >= 1)
{
PathFigure figure = new PathFigure();
figure.IsFilled = isFilled;
figure.StartPoint = new Point(pPoints->X, pPoints->Y);
int pointIndex = 1;
int sameSegCount = 0;
for (int segIndex = 0; segIndex < segmentCount; segIndex += sameSegCount)
{
byte segType = (byte)(pSegTypes[segIndex] & (byte)MILCoreSegFlags.SegTypeMask);
sameSegCount = 1;
// Look for a run of same-type segments for a PolyXXXSegment.
while (((segIndex + sameSegCount) < segmentCount) &&
(pSegTypes[segIndex] == pSegTypes[segIndex + sameSegCount]))
{
sameSegCount++;
}
bool fStroked = (pSegTypes[segIndex] & (byte)MILCoreSegFlags.SegIsAGap) == (byte)0;
bool fSmooth = (pSegTypes[segIndex] & (byte)MILCoreSegFlags.SegSmoothJoin) != (byte)0;
if (segType == (byte)MILCoreSegFlags.SegTypeLine)
{
if (pointIndex + sameSegCount > pointCount)
{
throw new System.InvalidOperationException(SR.Get(SRID.PathGeometry_InternalReadBackError));
}
if (sameSegCount > 1)
{
PointCollection ptCollection = new PointCollection();
for (int i = 0; i < sameSegCount; i++)
{
ptCollection.Add(new Point(pPoints[pointIndex + i].X, pPoints[pointIndex + i].Y));
}
ptCollection.Freeze();
PolyLineSegment polySeg = new PolyLineSegment(ptCollection, fStroked, fSmooth);
polySeg.Freeze();
figure.Segments.Add(polySeg);
}
else
{
Debug.Assert(sameSegCount == 1);
figure.Segments.Add(new LineSegment(new Point(pPoints[pointIndex].X, pPoints[pointIndex].Y), fStroked, fSmooth));
}
pointIndex += sameSegCount;
}
else if (segType == (byte)MILCoreSegFlags.SegTypeBezier)
{
int pointBezierCount = sameSegCount * 3;
if (pointIndex + pointBezierCount > pointCount)
{
throw new System.InvalidOperationException(SR.Get(SRID.PathGeometry_InternalReadBackError));
}
if (sameSegCount > 1)
{
PointCollection ptCollection = new PointCollection();
for (int i = 0; i < pointBezierCount; i++)
{
ptCollection.Add(new Point(pPoints[pointIndex + i].X, pPoints[pointIndex + i].Y));
}
ptCollection.Freeze();
PolyBezierSegment polySeg = new PolyBezierSegment(ptCollection, fStroked, fSmooth);
polySeg.Freeze();
figure.Segments.Add(polySeg);
}
else
{
Debug.Assert(sameSegCount == 1);
figure.Segments.Add(new BezierSegment(
new Point(pPoints[pointIndex].X, pPoints[pointIndex].Y),
new Point(pPoints[pointIndex + 1].X, pPoints[pointIndex + 1].Y),
new Point(pPoints[pointIndex + 2].X, pPoints[pointIndex + 2].Y),
fStroked,
fSmooth));
}
pointIndex += pointBezierCount;
}
else
{
throw new System.InvalidOperationException(SR.Get(SRID.PathGeometry_InternalReadBackError));
}
}
if (isClosed)
{
figure.IsClosed = true;
}
figure.Freeze();
Figures.Add(figure);
// Do not bother adding empty figures.
}
}
/// <summary>
/// Captures this device to a particular element.
/// </summary>
/// <param name="element">The element this device will be captured to.</param>
/// <param name="captureMode">The type of capture to use.</param>
/// <returns>true if capture was changed, false otherwise.</returns>
public bool Capture(IInputElement element, CaptureMode captureMode)
{
VerifyAccess();
// If the element is null or captureMode is None, ensure
// that the other parameter is consistent.
if ((element == null) || (captureMode == CaptureMode.None))
{
element = null;
captureMode = CaptureMode.None;
}
UIElement uiElement;
ContentElement contentElement;
UIElement3D uiElement3D;
CastInputElement(element, out uiElement, out contentElement, out uiElement3D);
if ((element != null) && (uiElement == null) && (contentElement == null) && (uiElement3D == null))
{
throw new ArgumentException(SR.Get(SRID.Invalid_IInputElement, element.GetType()), "element");
}
if (_captured != element)
{
// Ensure that the new element is visible and enabled
if ((element == null) ||
(((uiElement != null) && uiElement.IsVisible && uiElement.IsEnabled) ||
((contentElement != null) && contentElement.IsEnabled) ||
((uiElement3D != null) && uiElement3D.IsVisible && uiElement3D.IsEnabled)))
{
IInputElement oldCapture = _captured;
_captured = element;
_captureMode = captureMode;
UIElement oldUIElement;
ContentElement oldContentElement;
UIElement3D oldUIElement3D;
CastInputElement(oldCapture, out oldUIElement, out oldContentElement, out oldUIElement3D);
if (oldUIElement != null)
{
oldUIElement.IsEnabledChanged -= OnReevaluateCapture;
oldUIElement.IsVisibleChanged -= OnReevaluateCapture;
oldUIElement.IsHitTestVisibleChanged -= OnReevaluateCapture;
}
else if (oldContentElement != null)
{
oldContentElement.IsEnabledChanged -= OnReevaluateCapture;
}
else if (oldUIElement3D != null)
{
oldUIElement3D.IsEnabledChanged -= OnReevaluateCapture;
oldUIElement3D.IsVisibleChanged -= OnReevaluateCapture;
oldUIElement3D.IsHitTestVisibleChanged -= OnReevaluateCapture;
}
if (uiElement != null)
{
uiElement.IsEnabledChanged += OnReevaluateCapture;
uiElement.IsVisibleChanged += OnReevaluateCapture;
uiElement.IsHitTestVisibleChanged += OnReevaluateCapture;
}
else if (contentElement != null)
{
contentElement.IsEnabledChanged += OnReevaluateCapture;
}
else if (uiElement3D != null)
{
uiElement3D.IsEnabledChanged += OnReevaluateCapture;
uiElement3D.IsVisibleChanged += OnReevaluateCapture;
uiElement3D.IsHitTestVisibleChanged += OnReevaluateCapture;
}
UpdateReverseInheritedProperty(/* capture = */ true, oldCapture, _captured);
if (oldCapture != null)
{
DependencyObject o = oldCapture as DependencyObject;
o.SetValue(UIElement.AreAnyTouchesCapturedPropertyKey,
BooleanBoxes.Box(AreAnyTouchesCapturedOrDirectlyOver(oldCapture, /* isCapture = */ true)));
}
if (_captured != null)
{
DependencyObject o = _captured as DependencyObject;
o.SetValue(UIElement.AreAnyTouchesCapturedPropertyKey, BooleanBoxes.TrueBox);
}
if (oldCapture != null)
{
RaiseLostCapture(oldCapture);
}
if (_captured != null)
{
RaiseGotCapture(_captured);
}
// Capture successfully moved, notify the subclass.
OnCapture(element, captureMode);
Synchronize();
return(true);
}
else
{
return(false);
}
}
else
{
return(true);
}
}
/// <summary>
/// Open Media
/// </summary>
private void OpenMedia(Uri source)
{
string toOpen = null;
if (source != null && source.IsAbsoluteUri && source.Scheme == PackUriHelper.UriSchemePack)
{
try
{
source = BaseUriHelper.ConvertPackUriToAbsoluteExternallyVisibleUri(source);
}
catch (InvalidOperationException)
{
source = null;
_mediaEventsHelper.RaiseMediaFailed(new System.NotSupportedException(SR.Get(SRID.Media_PackURIsAreNotSupported, null)));
}
}
// Setting a null source effectively disconects the MediaElement.
if (source != null)
{
// get the base directory of the application; never expose this
Uri appBase = SecurityHelper.GetBaseDirectory(AppDomain.CurrentDomain);
// this extracts the URI to open
Uri uriToOpen = ResolveUri(source, appBase);
toOpen = DemandPermissions(uriToOpen);
}
else
{
toOpen = null;
}
// We pass in exact same URI for which we demanded permissions so that we can be sure
// there is no discrepancy between the two.
HRESULT.Check(MILMedia.Open(_nativeMedia, toOpen));
}
internal static object Invoke(AutomationPeer peer, DispatcherOperationCallback work, object arg)
{
Dispatcher dispatcher = peer.Dispatcher;
// Null dispatcher likely means the visual is in bad shape!
if (dispatcher == null)
{
throw new ElementNotAvailableException();
}
Exception remoteException = null;
bool completed = false;
object retVal = dispatcher.Invoke(
DispatcherPriority.Send,
TimeSpan.FromMinutes(3),
(DispatcherOperationCallback) delegate(object unused)
{
try
{
return(work(arg));
}
catch (Exception e)
{
remoteException = e;
return(null);
}
catch //for non-CLS Compliant exceptions
{
remoteException = null;
return(null);
}
finally
{
completed = true;
}
},
null);
if (completed)
{
if (remoteException != null)
{
throw remoteException;
}
}
else
{
bool dispatcherInShutdown = dispatcher.HasShutdownStarted;
if (dispatcherInShutdown)
{
throw new InvalidOperationException(SR.Get(SRID.AutomationDispatcherShutdown));
}
else
{
throw new TimeoutException(SR.Get(SRID.AutomationTimeout));
}
}
return(retVal);
}
private void Init()
{
if (_ploc.Value == System.IntPtr.Zero)
{
// Initializing context
LsErr lserr = LsErr.None;
LsContextInfo contextInfo = new LsContextInfo();
LscbkRedefined lscbkRedef = new LscbkRedefined();
_callbacks = new LineServicesCallbacks();
_callbacks.PopulateContextInfo(ref contextInfo, ref lscbkRedef);
contextInfo.version = 4; // we should set this right, they might check it in the future
contextInfo.pols = IntPtr.Zero; // This will be filled in the un-managed code
contextInfo.cEstimatedCharsPerLine = TextStore.TypicalCharactersPerLine;
contextInfo.fDontReleaseRuns = 1; // dont waste time
// There are 3 justification priorities right now with one considered good
// and the other two provided for emergency expansion.
// Future development to enable international justification will likely change this.
// e.g. Kashida justification would require more than one good priorities.
contextInfo.cJustPriorityLim = 3;
// Fill up text configuration
contextInfo.wchNull = '\u0000';
contextInfo.wchUndef = '\u0001';
contextInfo.wchTab = '\u0009';
contextInfo.wchPosTab = contextInfo.wchUndef;
contextInfo.wchEndPara1 = TextStore.CharParaSeparator; // Unicode para separator
contextInfo.wchEndPara2 = contextInfo.wchUndef;
contextInfo.wchSpace = '\u0020';
contextInfo.wchHyphen = MS.Internal.Text.TextInterface.TextAnalyzer.CharHyphen; //'\x002d';
contextInfo.wchNonReqHyphen = '\u00AD';
contextInfo.wchNonBreakHyphen = '\u2011';
contextInfo.wchEnDash = '\u2013';
contextInfo.wchEmDash = '\u2014';
contextInfo.wchEnSpace = '\u2002';
contextInfo.wchEmSpace = '\u2003';
contextInfo.wchNarrowSpace = '\u2009';
contextInfo.wchJoiner = '\u200D';
contextInfo.wchNonJoiner = '\u200C';
contextInfo.wchVisiNull = '\u2050';
contextInfo.wchVisiAltEndPara = '\u2051';
contextInfo.wchVisiEndLineInPara = '\u2052';
contextInfo.wchVisiEndPara = '\u2053';
contextInfo.wchVisiSpace = '\u2054';
contextInfo.wchVisiNonBreakSpace = '\u2055';
contextInfo.wchVisiNonBreakHyphen = '\u2056';
contextInfo.wchVisiNonReqHyphen = '\u2057';
contextInfo.wchVisiTab = '\u2058';
contextInfo.wchVisiPosTab = contextInfo.wchUndef;
contextInfo.wchVisiEmSpace = '\u2059';
contextInfo.wchVisiEnSpace = '\u205A';
contextInfo.wchVisiNarrowSpace = '\u205B';
contextInfo.wchVisiOptBreak = '\u205C';
contextInfo.wchVisiNoBreak = '\u205D';
contextInfo.wchVisiFESpace = '\u205E';
contextInfo.wchFESpace = '\u3000';
contextInfo.wchEscAnmRun = TextStore.CharParaSeparator;
contextInfo.wchAltEndPara = contextInfo.wchUndef;
contextInfo.wchEndLineInPara = TextStore.CharLineSeparator;
contextInfo.wchSectionBreak = contextInfo.wchUndef;
contextInfo.wchNonBreakSpace = '\u00A0';
contextInfo.wchNoBreak = contextInfo.wchUndef;
contextInfo.wchColumnBreak = contextInfo.wchUndef;
contextInfo.wchPageBreak = contextInfo.wchUndef;
contextInfo.wchOptBreak = contextInfo.wchUndef;
contextInfo.wchToReplace = contextInfo.wchUndef;
contextInfo.wchReplace = contextInfo.wchUndef;
IntPtr ploc = IntPtr.Zero;
IntPtr ppenaltyModule = IntPtr.Zero;
lserr = UnsafeNativeMethods.LoCreateContext(
ref contextInfo,
ref lscbkRedef,
out ploc
);
if (lserr != LsErr.None)
{
ThrowExceptionFromLsError(SR.Get(SRID.CreateContextFailure, lserr), lserr);
}
if (_specialCharacters == null)
{
SetSpecialCharacters(ref contextInfo);
}
_ploc.Value = ploc;
GC.KeepAlive(contextInfo);
// There is a trick here to pass in this resolution as in twips
// (1/1440 an inch).
//
// LSCreateLine assumes the max width passed in is in twips so to
// allow its client to express their width in page unit. However
// it asks client to set up the real device resolution here so
// that it can internally translate the "twips" width into client
// actual device unit.
//
// We are not device dependent anyway, so instead of following the
// rule which will cause us to validate the context every time. We
// choose to cheat LS to think that our unit is twips.
//
LsDevRes devRes;
devRes.dxpInch = devRes.dxrInch = TwipsPerInch;
devRes.dypInch = devRes.dyrInch = TwipsPerInch;
SetDoc(
true, // Yes, we will be displaying
true, // Yes, reference and presentation are the same device
ref devRes // Device resolutions
);
SetBreaking(BreakStrategies.BreakCJK);
}
}
protected virtual void AddText(string childText)
{
throw new InvalidOperationException(SR.Get(SRID.Animation_NoTextChildren));
}
/// <summary>
/// Viewport3DVisual does not yet support Geometry hit testing.
/// </summary>
protected override GeometryHitTestResult HitTestCore(GeometryHitTestParameters hitTestParameters)
{
throw new NotSupportedException(SR.Get(SRID.HitTest_Invalid, typeof(GeometryHitTestParameters).Name, this.GetType().Name));
}
/// <summary>
/// Throw unexpected token exception
/// </summary>
private void ThrowBadToken()
{
throw new System.FormatException(SR.Get(SRID.Parser_UnexpectedToken, _pathString, _curIndex - 1));
}
/// <summary>
/// Sets a back buffer source for this D3DImage.
///
/// If enableSoftwareFallback is true, D3DImage will enable rendering of your surface
/// in software (TS, etc.).
///
/// You can only call this while locked. You only need to call this once, unless
/// IsFrontBufferAvailable goes from false -> true and then you MUST call this
/// again. When IsFrontBufferAvailable goes to false, we release our reference
/// to your back buffer, except when enableSoftwareFallBack is true, in which case
/// you are responsible for calling SetBackBuffer again with a null value to get us
/// to release the reference. In this case, you are responsible for checking your
/// device for device loss when rendering.
///
/// Requirements on backBuffer by type:
/// IDirect3DSurface9
/// D3DFMT_A8R8G8B8 or D3DFMT_X8R8G8B8
/// D3DUSAGE_RENDERTARGET
/// D3DPOOL_DEFAULT
/// Multisampling is allowed on 9Ex only
/// Lockability is optional but has performance impact (see below)
///
/// For best performance by type:
/// IDirect3DSurface9
/// Vista WDDM: non-lockable, created on IDirect3DDevice9Ex with
/// D3DDEVCAPS2_CAN_STRETCHRECT_FROM_TEXTURES and
/// D3DCAPS2_CANSHARERESOURCE support.
/// Vista XDDM: Doesn't matter. Software copying is fastest.
/// non-Vista: Lockable with GetDC support for the pixel format and
/// D3DDEVCAPS2_CAN_STRETCHRECT_FROM_TEXTURES support.
///
/// </summary>
public void SetBackBuffer(D3DResourceType backBufferType, IntPtr backBuffer, bool enableSoftwareFallback)
{
WritePreamble();
if (_lockCount == 0)
{
throw new InvalidOperationException(SR.Get(SRID.Image_MustBeLocked));
}
// In case the user passed in something like "(D3DResourceType)-1"
if (backBufferType != D3DResourceType.IDirect3DSurface9)
{
throw new ArgumentOutOfRangeException("backBufferType");
}
// Early-out if the current back buffer equals the new one. If the front buffer
// is not available and software fallback is not enabled, _pUserSurfaceUnsafe
// will be null and this check will fail. We don't want a null backBuffer to
// early-out when the front buffer isn't available.
if (backBuffer != IntPtr.Zero && backBuffer == _pUserSurfaceUnsafe)
{
return;
}
SafeMILHandle newBitmap = null;
uint newPixelWidth = 0;
uint newPixelHeight = 0;
// Create a new CInteropDeviceBitmap. Note that a null backBuffer will result
// in a null _pInteropDeviceBitmap at the end
if (backBuffer != IntPtr.Zero)
{
HRESULT.Check(UnsafeNativeMethods.InteropDeviceBitmap.Create(
backBuffer,
_dpiX,
_dpiY,
++_version,
_availableCallback,
enableSoftwareFallback,
out newBitmap,
out newPixelWidth,
out newPixelHeight
));
}
//
// We need to completely disassociate with the old interop bitmap if it
// exists because it won't be deleted until the composition thread is done
// with it or until the garbage collector runs.
//
if (_pInteropDeviceBitmap != null)
{
// 1. Tell the old bitmap to stop sending front buffer messages because
// our new back buffer may be on a different adapter. Plus, tell the
// bitmap to release the back buffer in case the user wants to delete
// it immediately.
UnsafeNativeMethods.InteropDeviceBitmap.Detach(_pInteropDeviceBitmap);
// 2. If we were waiting for a present, unhook from commit
UnsubscribeFromCommittingBatch();
// 3. We are no longer dirty
_isDirty = false;
// Note: We don't need to do anything to the event because we're under
// the protection of Lock
}
// If anything about the new surface were unacceptible, we would have recieved
// a bad HRESULT from Create() so everything must be good
_pInteropDeviceBitmap = newBitmap;
_pUserSurfaceUnsafe = backBuffer;
_pixelWidth = newPixelWidth;
_pixelHeight = newPixelHeight;
_isSoftwareFallbackEnabled = enableSoftwareFallback;
// AddDirtyRect is usually what triggers Changed, but AddDirtyRect isn't allowed with
// no back buffer so we mark for Changed here
if (_pInteropDeviceBitmap == null)
{
_isChangePending = true;
}
RegisterForAsyncUpdateResource();
_waitingForUpdateResourceBecauseBitmapChanged = true;
// WritePostscript will happen at Unlock
}
/// <summary>
/// Subtract operator - substracts each channel of the second color from each channel of the
/// first and returns the result
/// </summary>
/// <param name='color1'>The minuend</param>
/// <param name='color2'>The subtrahend</param>
/// <returns>Returns the unclamped differnce</returns>
public static Color operator -(Color color1, Color color2)
{
if (color1.context == null && color2.context == null)
{
Color c1 = FromScRgb(
color1.scRgbColor.a - color2.scRgbColor.a,
color1.scRgbColor.r - color2.scRgbColor.r,
color1.scRgbColor.g - color2.scRgbColor.g,
color1.scRgbColor.b - color2.scRgbColor.b
);
return(c1);
}
else if (color1.context == null || color2.context == null)
{
throw new ArgumentException(SR.Get(SRID.Color_ColorContextTypeMismatch, null));
}
else if (color1.context == color2.context)
{
Color c1 = new Color();
c1.context = color1.context;
#pragma warning suppress 6506 // c1.context is obviously not null - both color1.context AND color2.context are not null
c1.nativeColorValue = new float[c1.context.NumChannels];
for (int i = 0; i < c1.nativeColorValue.GetLength(0); i++)
{
c1.nativeColorValue[i] = color1.nativeColorValue[i] - color2.nativeColorValue[i];
}
Color c2 = Color.FromRgb(0, 0, 0);
c2.context = new ColorContext(PixelFormats.Bgra32);
ColorTransform colorTransform = new ColorTransform(c1.context, c2.context);
float[] sRGBValue = new float[3];
colorTransform.Translate(c1.nativeColorValue, sRGBValue);
if (sRGBValue[0] < 0.0f)
{
c1.sRgbColor.r = 0;
}
else if (sRGBValue[0] > 1.0f)
{
c1.sRgbColor.r = 255;
}
else
{
c1.sRgbColor.r = (byte)((sRGBValue[0] * 255.0f) + 0.5f);
}
if (sRGBValue[1] < 0.0f)
{
c1.sRgbColor.g = 0;
}
else if (sRGBValue[1] > 1.0f)
{
c1.sRgbColor.g = 255;
}
else
{
c1.sRgbColor.g = (byte)((sRGBValue[1] * 255.0f) + 0.5f);
}
if (sRGBValue[2] < 0.0f)
{
c1.sRgbColor.b = 0;
}
else if (sRGBValue[2] > 1.0f)
{
c1.sRgbColor.b = 255;
}
else
{
c1.sRgbColor.b = (byte)((sRGBValue[2] * 255.0f) + 0.5f);
}
c1.scRgbColor.r = sRgbToScRgb(c1.sRgbColor.r);
c1.scRgbColor.g = sRgbToScRgb(c1.sRgbColor.g);
c1.scRgbColor.b = sRgbToScRgb(c1.sRgbColor.b);
c1.scRgbColor.a = color1.scRgbColor.a - color2.scRgbColor.a;
if (c1.scRgbColor.a < 0.0f)
{
c1.scRgbColor.a = 0.0f;
c1.sRgbColor.a = 0;
}
else if (c1.scRgbColor.a > 1.0f)
{
c1.scRgbColor.a = 1.0f;
c1.sRgbColor.a = 255;
}
else
{
c1.sRgbColor.a = (byte)((c1.scRgbColor.a * 255.0f) + 0.5f);
}
return(c1);
}
else
{
throw new ArgumentException(SR.Get(SRID.Color_ColorContextTypeMismatch, null));
}
}
// NOTE: The code here is highly similar to RemoveChildCore in ModelVisual3D,
// but slightly different because the parent is 2D here.
void IVisual3DContainer.RemoveChild(Visual3D child)
{
int index = child.ParentIndex;
// It is invalid to modify the children collection that we
// might be iterating during a property invalidation tree walk.
if (IsVisualChildrenIterationInProgress)
{
throw new InvalidOperationException(SR.Get(SRID.CannotModifyVisualChildrenDuringTreeWalk));
}
// invalid during a VisualTreeChanged event
VisualDiagnostics.VerifyVisualTreeChange(this);
Debug.Assert(child != null);
Debug.Assert(child.InternalVisualParent == this);
VisualDiagnostics.OnVisualChildChanged(this, child, false);
child.SetParent(/* newParent = */ (Visual)null); // CS0121: Call is ambigious without casting null to Visual.
// remove the inheritance context
if (_inheritanceContextForChildren != null)
{
_inheritanceContextForChildren.RemoveSelfAsInheritanceContext(child, null);
}
//
// Remove the child on all channels this visual is marshalled to.
//
for (int i = 0, limit = _proxy3D.Count; i < limit; i++)
{
DUCE.Channel channel = _proxy3D.GetChannel(i);
if (child.CheckFlagsAnd(channel, VisualProxyFlags.IsConnectedToParent))
{
child.SetFlags(channel, false, VisualProxyFlags.IsConnectedToParent);
DUCE.IResource childResource = (DUCE.IResource)child;
childResource.RemoveChildFromParent(this, channel);
childResource.ReleaseOnChannel(channel);
}
}
SetFlagsOnAllChannels(true, VisualProxyFlags.IsContentDirty);
//
// Force a full precompute and render pass for this visual.
//
Visual.PropagateFlags(
this,
VisualFlags.IsSubtreeDirtyForPrecompute,
VisualProxyFlags.IsSubtreeDirtyForRender);
// We do not currently support layout in 3D
// UIElement.PropagateSuspendLayout(child);
child.FireOnVisualParentChanged(this);
OnVisualChildrenChanged(/* visualAdded = */ null, child);
}
private const int BUFFERSIZE = 4096; // the maximum size of the buffer used for loading from stream
private void LegacyLoadFromStream(Stream cursorStream)
{
//Generate a temporal file based on the memory stream.
// GetTempFileName requires unrestricted Environment permission
// FileIOPermission.Write permission. However, since we don't
// know the path of the file to be created we have to give
// unrestricted permission here.
// GetTempFileName documentation does not mention that it throws
// any exception. However, if it does, CLR reverts the assert.
string filePath = Path.GetTempFileName();
try
{
using (BinaryReader reader = new BinaryReader(cursorStream))
{
using (FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Write, FileShare.None))
{
// Read the bytes from the stream, up to BUFFERSIZE
byte[] cursorData = reader.ReadBytes(BUFFERSIZE);
int dataSize;
// If the buffer is filled up, then write those bytes out and read more bytes up to BUFFERSIZE
for (dataSize = cursorData.Length;
dataSize >= BUFFERSIZE;
dataSize = reader.Read(cursorData, 0 /*index in array*/, BUFFERSIZE /*bytes to read*/))
{
fileStream.Write(cursorData, 0 /*index in array*/, BUFFERSIZE /*bytes to write*/);
}
// Write any remaining bytes
fileStream.Write(cursorData, 0 /*index in array*/, dataSize /*bytes to write*/);
}
}
// This method is called with File Write permission still asserted.
// However, this method just reads this file into an icon.
_cursorHandle = UnsafeNativeMethods.LoadImageCursor(IntPtr.Zero,
filePath,
NativeMethods.IMAGE_CURSOR,
0, 0,
NativeMethods.LR_DEFAULTCOLOR |
NativeMethods.LR_LOADFROMFILE |
(_scaleWithDpi? NativeMethods.LR_DEFAULTSIZE : 0x0000));
if (_cursorHandle == null || _cursorHandle.IsInvalid)
{
throw new ArgumentException(SR.Get(SRID.Cursor_InvalidStream));
}
}
finally
{
try
{
File.Delete(filePath);
}
catch (System.IO.IOException)
{
// We may not be able to delete the file if it's being used by some other process (e.g. Anti-virus check).
// There's nothing we can do in that case, so just eat the exception and leave the file behind
}
}
}
internal static IList <TextBreakpoint> CreateMultiple(
TextParagraphCache paragraphCache,
int firstCharIndex,
int maxLineWidth,
TextLineBreak previousLineBreak,
IntPtr penaltyRestriction,
out int bestFitIndex
)
{
Invariant.Assert(paragraphCache != null);
// grab full text state from paragraph cache
FullTextState fullText = paragraphCache.FullText;
Invariant.Assert(fullText != null);
FormatSettings settings = fullText.TextStore.Settings;
Invariant.Assert(settings != null);
// update formatting parameters at line start
settings.UpdateSettingsForCurrentLine(
maxLineWidth,
previousLineBreak,
(firstCharIndex == fullText.TextStore.CpFirst)
);
Invariant.Assert(settings.Formatter != null);
// acquiring LS context
TextFormatterContext context = settings.Formatter.AcquireContext(fullText, IntPtr.Zero);
IntPtr previousBreakRecord = IntPtr.Zero;
if (settings.PreviousLineBreak != null)
{
previousBreakRecord = settings.PreviousLineBreak.BreakRecord.Value;
}
// need not consider marker as tab since marker does not affect line metrics and it wasnt drawn.
fullText.SetTabs(context);
LsBreaks lsbreaks = new LsBreaks();
LsErr lserr = context.CreateBreaks(
fullText.GetBreakpointInternalCp(firstCharIndex),
previousBreakRecord,
paragraphCache.Ploparabreak.Value, // para breaking session
penaltyRestriction,
ref lsbreaks,
out bestFitIndex
);
// get the exception in context before it is released
Exception callbackException = context.CallbackException;
// release the context
context.Release();
if (lserr != LsErr.None)
{
if (callbackException != null)
{
// rethrow exception thrown in callbacks
throw callbackException;
}
else
{
// throw with LS error codes
TextFormatterContext.ThrowExceptionFromLsError(SR.Get(SRID.CreateBreaksFailure, lserr), lserr);
}
}
// keep context alive at least till here
GC.KeepAlive(context);
TextBreakpoint[] breakpoints = new TextBreakpoint[lsbreaks.cBreaks];
for (int i = 0; i < lsbreaks.cBreaks; i++)
{
breakpoints[i] = new FullTextBreakpoint(
fullText,
firstCharIndex,
maxLineWidth,
ref lsbreaks,
i // the current break
);
}
return(breakpoints);
}
/// <summary>
/// Verify all text formatting arguments
/// </summary>
private void VerifyTextFormattingArguments(
TextSource textSource,
int firstCharIndex,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextRunCache textRunCache
)
{
if (textSource == null)
{
throw new ArgumentNullException("textSource");
}
if (textRunCache == null)
{
throw new ArgumentNullException("textRunCache");
}
if (paragraphProperties == null)
{
throw new ArgumentNullException("paragraphProperties");
}
if (paragraphProperties.DefaultTextRunProperties == null)
{
throw new ArgumentNullException("paragraphProperties.DefaultTextRunProperties");
}
if (paragraphProperties.DefaultTextRunProperties.Typeface == null)
{
throw new ArgumentNullException("paragraphProperties.DefaultTextRunProperties.Typeface");
}
if (DoubleUtil.IsNaN(paragraphWidth))
{
throw new ArgumentOutOfRangeException("paragraphWidth", SR.Get(SRID.ParameterValueCannotBeNaN));
}
if (double.IsInfinity(paragraphWidth))
{
throw new ArgumentOutOfRangeException("paragraphWidth", SR.Get(SRID.ParameterValueCannotBeInfinity));
}
if (paragraphWidth < 0 ||
paragraphWidth > Constants.RealInfiniteWidth)
{
throw new ArgumentOutOfRangeException("paragraphWidth", SR.Get(SRID.ParameterMustBeBetween, 0, Constants.RealInfiniteWidth));
}
double realMaxFontRenderingEmSize = Constants.RealInfiniteWidth / Constants.GreatestMutiplierOfEm;
if (paragraphProperties.DefaultTextRunProperties.FontRenderingEmSize < 0 ||
paragraphProperties.DefaultTextRunProperties.FontRenderingEmSize > realMaxFontRenderingEmSize)
{
throw new ArgumentOutOfRangeException("paragraphProperties.DefaultTextRunProperties.FontRenderingEmSize", SR.Get(SRID.ParameterMustBeBetween, 0, realMaxFontRenderingEmSize));
}
if (paragraphProperties.Indent > Constants.RealInfiniteWidth)
{
throw new ArgumentOutOfRangeException("paragraphProperties.Indent", SR.Get(SRID.ParameterCannotBeGreaterThan, Constants.RealInfiniteWidth));
}
if (paragraphProperties.LineHeight > Constants.RealInfiniteWidth)
{
throw new ArgumentOutOfRangeException("paragraphProperties.LineHeight", SR.Get(SRID.ParameterCannotBeGreaterThan, Constants.RealInfiniteWidth));
}
if (paragraphProperties.DefaultIncrementalTab < 0 ||
paragraphProperties.DefaultIncrementalTab > Constants.RealInfiniteWidth)
{
throw new ArgumentOutOfRangeException("paragraphProperties.DefaultIncrementalTab", SR.Get(SRID.ParameterMustBeBetween, 0, Constants.RealInfiniteWidth));
}
}
internal TextFormatterContext AcquireContext(
object owner,
IntPtr ploc
)
{
Invariant.Assert(owner != null);
TextFormatterContext context = null;
int c;
int contextCount = _contextList.Count;
for (c = 0; c < contextCount; c++)
{
context = (TextFormatterContext)_contextList[c];
if (ploc == IntPtr.Zero)
{
if (context.Owner == null)
{
break;
}
}
else if (ploc == context.Ploc.Value)
{
// LS requires that we use the exact same context for line
// destruction or hittesting (part of the reason is that LS
// actually caches some run info in the context). So here
// we use the actual PLSC as the context signature so we
// locate the one we want.
Debug.Assert(context.Owner == null);
break;
}
}
if (c == contextCount)
{
if (contextCount == 0 || !_multipleContextProhibited)
{
// no free one exists, create a new one
context = new TextFormatterContext();
_contextList.Add(context);
}
else
{
// This instance of TextFormatter only allows a single context, reentering the
// same TextFormatter in this case is not allowed.
//
// This requirement is currently enforced only during optimal break computation.
// Client implementing nesting of optimal break content inside another must create
// a separate TextFormatter instance for each content in different nesting level.
throw new InvalidOperationException(SR.Get(SRID.TextFormatterReentranceProhibited));
}
}
Debug.Assert(context != null);
context.Owner = owner;
return(context);
}
/// <summary>
/// Removes a handler for the SourceChanged event to the element.
/// </summary>
/// <param name="e">The element to remove the handler from.</param>
/// <param name="handler">The hander to remove.</param>
/// <remarks>
/// Even though this is a routed event handler, there are special
/// restrictions placed on this event.
/// 1) You cannot use the UIElement or ContentElement RemoveHandler() method.
/// </remarks>
public static void RemoveSourceChangedHandler(IInputElement e, SourceChangedEventHandler handler)
{
if (e == null)
{
throw new ArgumentNullException("e");
}
if (!InputElement.IsValid(e))
{
throw new ArgumentException(SR.Get(SRID.Invalid_IInputElement), "e");
}
DependencyObject o = (DependencyObject)e;
// o.VerifyAccess();
// I would rather throw an exception here, but the CLR doesn't
// so we won't either.
if (handler != null)
{
FrugalObjectList <RoutedEventHandlerInfo> info = null;
EventHandlersStore store;
// Either UIElement or ContentElement.
if (InputElement.IsUIElement(o))
{
UIElement uie = o as UIElement;
uie.RemoveHandler(SourceChangedEvent, handler);
store = uie.EventHandlersStore;
if (store != null)
{
info = store[SourceChangedEvent];
}
if (info == null || info.Count == 0)
{
uie.VisualAncestorChanged -= new Visual.AncestorChangedEventHandler(uie.OnVisualAncestorChanged);;
RemoveElementFromWatchList(uie);
}
}
else if (InputElement.IsUIElement3D(o))
{
UIElement3D uie3D = o as UIElement3D;
uie3D.RemoveHandler(SourceChangedEvent, handler);
store = uie3D.EventHandlersStore;
if (store != null)
{
info = store[SourceChangedEvent];
}
if (info == null || info.Count == 0)
{
uie3D.VisualAncestorChanged -= new Visual.AncestorChangedEventHandler(uie3D.OnVisualAncestorChanged);;
RemoveElementFromWatchList(uie3D);
}
}
else
{
ContentElement ce = o as ContentElement;
ce.RemoveHandler(SourceChangedEvent, handler);
store = ce.EventHandlersStore;
if (store != null)
{
info = store[SourceChangedEvent];
}
if (info == null || info.Count == 0)
{
RemoveElementFromWatchList(ce);
}
}
}
}
/// <summary>
/// Recognize the strokes.
/// </summary>
/// <param name="strokes"></param>
/// <returns></returns>
internal GestureRecognitionResult[] Recognize(StrokeCollection strokes)
{
if (_disposed)
{
throw new ObjectDisposedException("NativeRecognizer");
}
//
// note that we validate this argument from GestureRecognizer
// but since this is marked TAS, we want to do it here as well
//
if (strokes == null)
{
throw new ArgumentNullException("strokes"); // Null is not allowed as the argument value
}
if (strokes.Count > 2)
{
throw new ArgumentException(SR.Get(SRID.StrokeCollectionCountTooBig), "strokes");
}
// Create an empty result.
GestureRecognitionResult[] recResults = new GestureRecognitionResult[] {};
if (strokes.Count == 0)
{
return(recResults);
}
int hr = 0;
try
{
// Reset the context
hr = MS.Win32.Recognizer.UnsafeNativeMethods.ResetContext(_hContext);
if (HRESULT.Failed(hr))
{
//finally block will clean up and throw
return(recResults);
}
// Add strokes
hr = AddStrokes(_hContext, strokes);
if (HRESULT.Failed(hr))
{
//AddStrokes's finally block will clean up this finally block will throw
return(recResults);
}
// recognize the ink
bool bIncremental;
hr = MS.Win32.Recognizer.UnsafeNativeMethods.Process(_hContext, out bIncremental);
if (HRESULT.Succeeded(hr))
{
if (s_GetAlternateListExists)
{
recResults = InvokeGetAlternateList();
}
else
{
recResults = InvokeGetLatticePtr();
}
}
}
finally
{
// Check if we should report any error.
if (HRESULT.Failed(hr))
{
//don't throw a com exception here, we don't need to pass out any details
throw new InvalidOperationException(SR.Get(SRID.UnspecifiedGestureException));
}
}
return(recResults);
}
//
// /// <summary>
// /// See if the current token matches the string s. If so, advance and
// /// return true. Else, return false.
// /// </summary>
// bool TryAdvance(string s)
// {
// Debug.Assert(s.Length != 0);
//
// bool match = false;
// if (More() && _pathString[_currentIndex] == s[0])
// {
// //
// // Don't bother reading subsequent characters, as the CLR parser will
// // do this for us later.
// //
// _currentIndex = Math.Min(_currentIndex + s.Length, _pathLength);
//
// match = true;
// }
//
// return match;
// }
//
/// <summary>
/// Read a floating point number
/// </summary>
/// <returns></returns>
double ReadNumber(bool allowComma)
{
if (!IsNumber(allowComma))
{
ThrowBadToken();
}
bool simple = true;
int start = _curIndex;
//
// Allow for a sign
//
// There are numbers that cannot be preceded with a sign, for instance, -NaN, but it's
// fine to ignore that at this point, since the CLR parser will catch this later.
//
if (More() && ((_pathString[_curIndex] == '-') || _pathString[_curIndex] == '+'))
{
_curIndex++;
}
// Check for Infinity (or -Infinity).
if (More() && (_pathString[_curIndex] == 'I'))
{
//
// Don't bother reading the characters, as the CLR parser will
// do this for us later.
//
_curIndex = Math.Min(_curIndex + 8, _pathLength); // "Infinity" has 8 characters
simple = false;
}
// Check for NaN
else if (More() && (_pathString[_curIndex] == 'N'))
{
//
// Don't bother reading the characters, as the CLR parser will
// do this for us later.
//
_curIndex = Math.Min(_curIndex + 3, _pathLength); // "NaN" has 3 characters
simple = false;
}
else
{
SkipDigits(!AllowSign);
// Optional period, followed by more digits
if (More() && (_pathString[_curIndex] == '.'))
{
simple = false;
_curIndex++;
SkipDigits(!AllowSign);
}
// Exponent
if (More() && ((_pathString[_curIndex] == 'E') || (_pathString[_curIndex] == 'e')))
{
simple = false;
_curIndex++;
SkipDigits(AllowSign);
}
}
if (simple && (_curIndex <= (start + 8))) // 32-bit integer
{
int sign = 1;
if (_pathString[start] == '+')
{
start++;
}
else if (_pathString[start] == '-')
{
start++;
sign = -1;
}
int value = 0;
while (start < _curIndex)
{
value = value * 10 + (_pathString[start] - '0');
start++;
}
return(value * sign);
}
else
{
ReadOnlySpan <char> slice = _pathString.AsSpan(start, _curIndex - start);
try
{
return(double.Parse(slice, provider: _formatProvider));
}
catch (FormatException except)
{
throw new System.FormatException(SR.Get(SRID.Parser_UnexpectedToken, _pathString, start), except);
}
}
}
internal static ApplicationGesture[] GetApplicationGestureArrayAndVerify(IEnumerable <ApplicationGesture> applicationGestures)
{
if (applicationGestures == null)
{
// Null is not allowed as the argument value
throw new ArgumentNullException("applicationGestures");
}
uint count = 0;
//we need to make a disconnected copy
ICollection <ApplicationGesture> collection = applicationGestures as ICollection <ApplicationGesture>;
if (collection != null)
{
count = (uint)collection.Count;
}
else
{
foreach (ApplicationGesture gesture in applicationGestures)
{
count++;
}
}
// Cannot be empty
if (count == 0)
{
// An empty array is not allowed.
throw new ArgumentException(SR.Get(SRID.ApplicationGestureArrayLengthIsZero), "applicationGestures");
}
bool foundAllGestures = false;
List <ApplicationGesture> gestures = new List <ApplicationGesture>();
foreach (ApplicationGesture gesture in applicationGestures)
{
if (!ApplicationGestureHelper.IsDefined(gesture))
{
throw new ArgumentException(SR.Get(SRID.ApplicationGestureIsInvalid), "applicationGestures");
}
//check for allgestures
if (gesture == ApplicationGesture.AllGestures)
{
foundAllGestures = true;
}
//check for dupes
if (gestures.Contains(gesture))
{
throw new ArgumentException(SR.Get(SRID.DuplicateApplicationGestureFound), "applicationGestures");
}
gestures.Add(gesture);
}
// AllGesture cannot be specified with other gestures
if (foundAllGestures && gestures.Count != 1)
{
// no dupes allowed
throw new ArgumentException(SR.Get(SRID.AllGesturesMustExistAlone), "applicationGestures");
}
return(gestures.ToArray());
}
/// <summary>
/// Captures the stylus to a particular element.
/// </summary>
internal override bool Capture(IInputElement element, CaptureMode captureMode)
{
int timeStamp = Environment.TickCount;
VerifyAccess();
if (!(captureMode == CaptureMode.None || captureMode == CaptureMode.Element || captureMode == CaptureMode.SubTree))
{
throw new System.ComponentModel.InvalidEnumArgumentException("captureMode", (int)captureMode, typeof(CaptureMode));
}
if (element == null)
{
captureMode = CaptureMode.None;
}
if (captureMode == CaptureMode.None)
{
element = null;
}
// Validate that element is either a UIElement or a ContentElement
DependencyObject doStylusCapture = element as DependencyObject;
if (doStylusCapture != null && !InputElement.IsValid(element))
{
throw new InvalidOperationException(SR.Get(SRID.Invalid_IInputElement, doStylusCapture.GetType()));
}
doStylusCapture?.VerifyAccess();
bool success = false;
// The element we are capturing to must be both enabled and visible.
UIElement e = element as UIElement;
if ((e?.IsVisible ?? false) || (e?.IsEnabled ?? false))
{
success = true;
}
else
{
ContentElement ce = element as ContentElement;
if (ce?.IsEnabled ?? false)
{
success = true;
}
else
{
// Setting capture to null.
success = true;
}
}
if (success)
{
ChangeStylusCapture(element, captureMode, timeStamp);
}
return(success);
}
/// <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");
}
}
internal static void BeginDownload(
BitmapDecoder decoder,
Uri uri,
RequestCachePolicy uriCachePolicy,
Stream stream
)
{
lock (_syncLock)
{
if (!_thread.IsAlive)
{
_thread.IsBackground = true;
_thread.Start();
}
}
QueueEntry entry;
// If there is already a download for this uri, just add the decoder to the list
if (uri != null)
{
lock (_syncLock)
{
if (_uriTable[uri] != null)
{
entry = (QueueEntry)_uriTable[uri];
entry.decoders.Add(new WeakReference(decoder));
return;
}
}
}
entry = new QueueEntry();
entry.decoders = new List <WeakReference>();
lock (_syncLock)
{
entry.decoders.Add(new WeakReference(decoder));
}
entry.inputUri = uri;
entry.inputStream = stream;
string cacheFolder = MS.Win32.WinInet.InternetCacheFolder.LocalPath;
bool passed = false;
new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Assert(); // BlessedAssert
try
{
// Get the file path
StringBuilder tmpFileName = new StringBuilder(NativeMethods.MAX_PATH);
MS.Win32.UnsafeNativeMethods.GetTempFileName(cacheFolder, "WPF", 0, tmpFileName);
try
{
string pathToUse = tmpFileName.ToString();
SafeFileHandle fileHandle = MS.Win32.UnsafeNativeMethods.CreateFile(
pathToUse,
NativeMethods.GENERIC_READ | NativeMethods.GENERIC_WRITE, /* dwDesiredAccess */
0, /* dwShare */
null, /* lpSecurityAttributes */
NativeMethods.CREATE_ALWAYS, /* dwCreationDisposition */
NativeMethods.FILE_ATTRIBUTE_TEMPORARY |
NativeMethods.FILE_FLAG_DELETE_ON_CLOSE, /* dwFlagsAndAttributes */
IntPtr.Zero /* hTemplateFile */
);
if (fileHandle.IsInvalid)
{
throw new Win32Exception();
}
entry.outputStream = new FileStream(fileHandle, FileAccess.ReadWrite);
entry.streamPath = pathToUse;
passed = true;
}
catch (Exception e)
{
if (CriticalExceptions.IsCriticalException(e))
{
throw;
}
}
}
finally
{
SecurityPermission.RevertAssert();
}
if (!passed)
{
throw new IOException(SR.Get(SRID.Image_CannotCreateTempFile));
}
entry.readBuffer = new byte[READ_SIZE];
entry.contentLength = -1;
entry.contentType = string.Empty;
entry.lastPercent = 0;
// Add the entry to the table if we know the uri
if (uri != null)
{
lock (_syncLock)
{
_uriTable[uri] = entry;
}
}
if (stream == null)
{
bool fElevate = false;
if (uri.Scheme == Uri.UriSchemeHttp || uri.Scheme == Uri.UriSchemeHttps)
{
SecurityHelper.BlockCrossDomainForHttpsApps(uri);
// In this case we first check to see if the consumer has media permissions for
// safe media (Site of Origin + Cross domain), if it
// does we assert and run the code that requires the assert
if (SecurityHelper.CallerHasMediaPermission(MediaPermissionAudio.NoAudio,
MediaPermissionVideo.NoVideo,
MediaPermissionImage.SafeImage))
{
fElevate = true;
}
}
// This is the case where we are accessing an http image from an http site and we have media permission
if (fElevate)
{
(new WebPermission(NetworkAccess.Connect, BindUriHelper.UriToString(uri))).Assert(); // BlessedAssert
}
try
{
entry.webRequest = WpfWebRequestHelper.CreateRequest(uri);
if (uriCachePolicy != null)
{
entry.webRequest.CachePolicy = uriCachePolicy;
}
}
finally
{
if (fElevate)
{
WebPermission.RevertAssert();
}
}
entry.webRequest.BeginGetResponse(_responseCallback, entry);
}
else
{
_workQueue.Enqueue(entry);
// Signal
_waitEvent.Set();
}
}
/// <summary>
/// Derived class must implement to support Visual children. The method must return
/// the child at the specified index. Index must be between 0 and GetVisualChildrenCount-1.
///
/// By default a Visual3D does not have any children.
///
/// Remark:
/// Need to lock down Visual tree during the callbacks.
/// During this virtual call it is not valid to modify the Visual tree.
///
/// It is okay to type this protected API to the 2D Visual. The only 2D Visual with
/// 3D childern is the Viewport3DVisual which is sealed. -- [....] 01/17/06
/// </summary>
protected override Visual3D GetVisual3DChild(int index)
{
throw new ArgumentOutOfRangeException("index", index, SR.Get(SRID.Visual_ArgumentOutOfRange));
}
/// <summary>
/// Creates a TransformCollection with all of the same elements as collection
/// </summary>
public TransformCollection(IEnumerable <Transform> collection)
{
// The WritePreamble and WritePostscript aren't technically necessary
// in the constructor as of 1/20/05 but they are put here in case
// their behavior changes at a later date
WritePreamble();
if (collection != null)
{
bool needsItemValidation = true;
ICollection <Transform> icollectionOfT = collection as ICollection <Transform>;
if (icollectionOfT != null)
{
_collection = new FrugalStructList <Transform>(icollectionOfT);
}
else
{
ICollection icollection = collection as ICollection;
if (icollection != null) // an IC but not and IC<T>
{
_collection = new FrugalStructList <Transform>(icollection);
}
else // not a IC or IC<T> so fall back to the slower Add
{
_collection = new FrugalStructList <Transform>();
foreach (Transform item in collection)
{
if (item == null)
{
throw new System.ArgumentException(SR.Get(SRID.Collection_NoNull));
}
Transform newValue = item;
OnFreezablePropertyChanged(/* oldValue = */ null, newValue);
_collection.Add(newValue);
OnInsert(newValue);
}
needsItemValidation = false;
}
}
if (needsItemValidation)
{
foreach (Transform item in collection)
{
if (item == null)
{
throw new System.ArgumentException(SR.Get(SRID.Collection_NoNull));
}
OnFreezablePropertyChanged(/* oldValue = */ null, item);
OnInsert(item);
}
}
WritePostscript();
}
else
{
throw new ArgumentNullException("collection");
}
}
///
/// Begin a download
///
internal static void BeginDownload(
BitmapDecoder decoder,
Uri uri,
RequestCachePolicy uriCachePolicy,
Stream stream
)
{
lock (_syncLock)
{
if (!_thread.IsAlive)
{
_thread.IsBackground = true;
_thread.Start();
}
}
QueueEntry entry;
// If there is already a download for this uri, just add the decoder to the list
if (uri != null)
{
lock (_syncLock)
{
if (_uriTable[uri] != null)
{
entry = (QueueEntry)_uriTable[uri];
entry.decoders.Add(new WeakReference(decoder));
return;
}
}
}
entry = new QueueEntry();
entry.decoders = new List <WeakReference>();
lock (_syncLock)
{
entry.decoders.Add(new WeakReference(decoder));
}
entry.inputUri = uri;
entry.inputStream = stream;
string cacheFolder = MS.Win32.WinInet.InternetCacheFolder.LocalPath;
bool passed = false;
new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Assert(); // BlessedAssert
try
{
// Get the file path
StringBuilder tmpFileName = new StringBuilder(NativeMethods.MAX_PATH);
MS.Win32.UnsafeNativeMethods.GetTempFileName(cacheFolder, "WPF", 0, tmpFileName);
try
{
string pathToUse = tmpFileName.ToString();
SafeFileHandle fileHandle = MS.Win32.UnsafeNativeMethods.CreateFile(
pathToUse,
NativeMethods.GENERIC_READ | NativeMethods.GENERIC_WRITE, /* dwDesiredAccess */
0, /* dwShare */
null, /* lpSecurityAttributes */
NativeMethods.CREATE_ALWAYS, /* dwCreationDisposition */
NativeMethods.FILE_ATTRIBUTE_TEMPORARY |
NativeMethods.FILE_FLAG_DELETE_ON_CLOSE, /* dwFlagsAndAttributes */
IntPtr.Zero /* hTemplateFile */
);
if (fileHandle.IsInvalid)
{
throw new Win32Exception();
}
entry.outputStream = new FileStream(fileHandle, FileAccess.ReadWrite);
entry.streamPath = pathToUse;
passed = true;
}
catch (Exception e)
{
if (CriticalExceptions.IsCriticalException(e))
{
throw;
}
}
}
finally
{
SecurityPermission.RevertAssert();
}
if (!passed)
{
throw new IOException(SR.Get(SRID.Image_CannotCreateTempFile));
}
entry.readBuffer = new byte[READ_SIZE];
entry.contentLength = -1;
entry.contentType = string.Empty;
entry.lastPercent = 0;
// Add the entry to the table if we know the uri
if (uri != null)
{
lock (_syncLock)
{
_uriTable[uri] = entry;
}
}
if (stream == null)
{
entry.webRequest = WpfWebRequestHelper.CreateRequest(uri);
if (uriCachePolicy != null)
{
entry.webRequest.CachePolicy = uriCachePolicy;
}
entry.webRequest.BeginGetResponse(_responseCallback, entry);
}
else
{
_workQueue.Enqueue(entry);
// Signal
_waitEvent.Set();
}
}
internal override void FinalizeCreation()
{
_bitmapInit.EnsureInitializedComplete();
Uri uri = UriSource;
if (_baseUri != null)
{
uri = new Uri(_baseUri, UriSource);
}
if ((CreateOptions & BitmapCreateOptions.IgnoreImageCache) != 0)
{
ImagingCache.RemoveFromImageCache(uri);
}
BitmapImage bitmapImage = CheckCache(uri);
if (bitmapImage != null &&
bitmapImage.CheckAccess() &&
bitmapImage.SourceRect.Equals(SourceRect) &&
bitmapImage.DecodePixelWidth == DecodePixelWidth &&
bitmapImage.DecodePixelHeight == DecodePixelHeight &&
bitmapImage.Rotation == Rotation &&
(bitmapImage.CreateOptions & BitmapCreateOptions.IgnoreColorProfile) ==
(CreateOptions & BitmapCreateOptions.IgnoreColorProfile)
)
{
_syncObject = bitmapImage.SyncObject;
lock (_syncObject)
{
WicSourceHandle = bitmapImage.WicSourceHandle;
IsSourceCached = bitmapImage.IsSourceCached;
_convertedDUCEPtr = bitmapImage._convertedDUCEPtr;
//
// We nee d to keep the strong reference to the cached image for a few reasons:
//
// The application may release the original cached image and then keep a
// reference to this image only, in which case, the cache can be collected.
// This will cause a few undesirable results:
// 1. The application may choose to decode the same URI again in which case
// we will not retrieve it from the cache even though we have a copy already
// decoded.
// 2. The original cached image holds onto the file stream indirectly which if
// collected can cause bad behavior if the entire image is not loaded into
// memory.
//
_cachedBitmapImage = bitmapImage;
}
UpdateCachedSettings();
return;
}
BitmapDecoder decoder = null;
if (_decoder == null)
{
// Note: We do not want to insert in the cache if there is a chance that
// the decode pixel width/height may cause the decoder LOD to change
decoder = BitmapDecoder.CreateFromUriOrStream(
_baseUri,
UriSource,
StreamSource,
CreateOptions & ~BitmapCreateOptions.DelayCreation,
BitmapCacheOption.None, // do not cache the frames since we will do that here
_uriCachePolicy,
false
);
if (decoder.IsDownloading)
{
_isDownloading = true;
_decoder = decoder;
decoder.DownloadProgress += OnDownloadProgress;
decoder.DownloadCompleted += OnDownloadCompleted;
decoder.DownloadFailed += OnDownloadFailed;
}
else
{
Debug.Assert(decoder.SyncObject != null);
}
}
else
{
// We already had a decoder, meaning we were downloading
Debug.Assert(!_decoder.IsDownloading);
decoder = _decoder;
_decoder = null;
}
if (decoder.Frames.Count == 0)
{
throw new System.ArgumentException(SR.Get(SRID.Image_NoDecodeFrames));
}
BitmapFrame frame = decoder.Frames[0];
BitmapSource source = frame;
Int32Rect sourceRect = SourceRect;
if (sourceRect.X == 0 && sourceRect.Y == 0 &&
sourceRect.Width == source.PixelWidth &&
sourceRect.Height == source.PixelHeight)
{
sourceRect = Int32Rect.Empty;
}
if (!sourceRect.IsEmpty)
{
CroppedBitmap croppedSource = new CroppedBitmap();
croppedSource.BeginInit();
croppedSource.Source = source;
croppedSource.SourceRect = sourceRect;
croppedSource.EndInit();
source = croppedSource;
if (_isDownloading)
{
// Unregister the download events because this is a dummy image. See comment below.
source.UnregisterDownloadEventSource();
}
}
int finalWidth = DecodePixelWidth;
int finalHeight = DecodePixelHeight;
if (finalWidth == 0 && finalHeight == 0)
{
finalWidth = source.PixelWidth;
finalHeight = source.PixelHeight;
}
else if (finalWidth == 0)
{
finalWidth = (source.PixelWidth * finalHeight) / source.PixelHeight;
}
else if (finalHeight == 0)
{
finalHeight = (source.PixelHeight * finalWidth) / source.PixelWidth;
}
if (finalWidth != source.PixelWidth || finalHeight != source.PixelHeight ||
Rotation != Rotation.Rotate0)
{
TransformedBitmap transformedSource = new TransformedBitmap();
transformedSource.BeginInit();
transformedSource.Source = source;
TransformGroup transformGroup = new TransformGroup();
if (finalWidth != source.PixelWidth || finalHeight != source.PixelHeight)
{
int oldWidth = source.PixelWidth;
int oldHeight = source.PixelHeight;
Debug.Assert(oldWidth > 0 && oldHeight > 0);
transformGroup.Children.Add(
new ScaleTransform(
(1.0 * finalWidth) / oldWidth,
(1.0 * finalHeight) / oldHeight));
}
if (Rotation != Rotation.Rotate0)
{
double rotation = 0.0;
switch (Rotation)
{
case Rotation.Rotate0:
rotation = 0.0;
break;
case Rotation.Rotate90:
rotation = 90.0;
break;
case Rotation.Rotate180:
rotation = 180.0;
break;
case Rotation.Rotate270:
rotation = 270.0;
break;
default:
Debug.Assert(false);
break;
}
transformGroup.Children.Add(new RotateTransform(rotation));
}
transformedSource.Transform = transformGroup;
transformedSource.EndInit();
source = transformedSource;
if (_isDownloading)
{
//
// If we're currently downloading, then the BitmapFrameDecode isn't actually
// the image, it's just a 1x1 placeholder. The chain we're currently building
// will be replaced with another chain once download completes, so there's no
// need to have this chain handle DownloadCompleted.
//
// Having this chain handle DownloadCompleted is actually a bad thing. Because
// the dummy is just 1x1, the TransformedBitmap we're building here will have
// a large scaling factor (to scale the image from 1x1 up to whatever
// DecodePixelWidth/Height specifies). When the TransformedBitmap receives
// DownloadCompleted from the BFD, it will call into WIC to create a new
// bitmap scaler using the same large scaling factor, which can produce a huge
// bitmap (since the BFD is now no longer 1x1). This problem is made worse if
// this BitmapImage has BitmapCacheOption.OnLoad, since that will put a
// CachedBitmap after the TransformedBitmap. When DownloadCompleted propagates
// from the TransformedBitmap down to the CachedBitmap, the CachedBitmap will
// call CreateBitmapFromSource using the TransformedBitmap, which calls
// CopyPixels on the huge TransformedBitmap. We want to avoid chewing up the
// CPU and the memory, so we unregister the download event handlers here.
//
source.UnregisterDownloadEventSource();
}
}
//
// If the original image has a color profile and IgnoreColorProfile is not one of the create options,
// apply the profile so bits are color-corrected.
//
if ((CreateOptions & BitmapCreateOptions.IgnoreColorProfile) == 0 &&
frame.ColorContexts != null &&
frame.ColorContexts[0] != null &&
frame.ColorContexts[0].IsValid &&
source.Format.Format != PixelFormatEnum.Extended
)
{
// NOTE: Never do this for a non-MIL pixel format, because the format converter has
// special knowledge to deal with the profile
PixelFormat duceFormat = BitmapSource.GetClosestDUCEFormat(source.Format, source.Palette);
bool changeFormat = (source.Format != duceFormat);
ColorContext destinationColorContext;
// We need to make sure, we can actually create the ColorContext for the destination duceFormat
// If the duceFormat is gray or scRGB, the following is not supported, so we cannot
// create the ColorConvertedBitmap
try
{
destinationColorContext = new ColorContext(duceFormat);
}
catch (NotSupportedException)
{
destinationColorContext = null;
}
if (destinationColorContext != null)
{
bool conversionSuccess = false;
bool badColorContext = false;
// First try if the color converter can handle the source format directly
// Its possible that the color converter does not support certain pixelformats, so put a try/catch here.
try
{
ColorConvertedBitmap colorConvertedBitmap = new ColorConvertedBitmap(
source,
frame.ColorContexts[0],
destinationColorContext,
duceFormat
);
source = colorConvertedBitmap;
if (_isDownloading)
{
// Unregister the download events because this is a dummy image. See comment above.
source.UnregisterDownloadEventSource();
}
conversionSuccess = true;
}
catch (NotSupportedException)
{
}
catch (FileFormatException)
{
// If the file contains a bad color context, we catch the exception here
// and don't bother trying the color conversion below, since color transform isn't possible
// with the given color context.
badColorContext = true;
}
if (!conversionSuccess && !badColorContext && changeFormat)
{ // If the conversion failed, we first use
// a FormatConvertedBitmap, and then Color Convert that one...
FormatConvertedBitmap formatConvertedBitmap = new FormatConvertedBitmap(source, duceFormat, source.Palette, 0.0);
ColorConvertedBitmap colorConvertedBitmap = new ColorConvertedBitmap(
formatConvertedBitmap,
frame.ColorContexts[0],
destinationColorContext,
duceFormat
);
source = colorConvertedBitmap;
if (_isDownloading)
{
// Unregister the download events because this is a dummy image. See comment above.
source.UnregisterDownloadEventSource();
}
}
}
}
if (CacheOption != BitmapCacheOption.None)
{
try
{
// The bitmaps bits could be corrupt, and this will cause an exception if the CachedBitmap forces a decode.
CachedBitmap cachedSource = new CachedBitmap(source, CreateOptions & ~BitmapCreateOptions.DelayCreation, CacheOption);
source = cachedSource;
if (_isDownloading)
{
// Unregister the download events because this is a dummy image. See comment above.
source.UnregisterDownloadEventSource();
}
}
catch (Exception e)
{
RecoverFromDecodeFailure(e);
CreationCompleted = true; // we're bailing out because the decode failed
return;
}
}
// If CacheOption == OnLoad, no need to keep the stream around
if (decoder != null && CacheOption == BitmapCacheOption.OnLoad)
{
decoder.CloseStream();
}
else if (CacheOption != BitmapCacheOption.OnLoad)
{
//ensure that we don't GC the source
_finalSource = source;
}
WicSourceHandle = source.WicSourceHandle;
IsSourceCached = source.IsSourceCached;
CreationCompleted = true;
UpdateCachedSettings();
// Only insert in the imaging cache if download is complete
if (!IsDownloading)
{
InsertInCache(uri);
}
}
/// <summary>
/// Open Media
/// </summary>
private void OpenMedia(Uri source)
{
string toOpen = null;
if (source != null && source.IsAbsoluteUri && source.Scheme == PackUriHelper.UriSchemePack)
{
try
{
source = BaseUriHelper.ConvertPackUriToAbsoluteExternallyVisibleUri(source);
}
catch (InvalidOperationException)
{
source = null;
_mediaEventsHelper.RaiseMediaFailed(new System.NotSupportedException(SR.Get(SRID.Media_PackURIsAreNotSupported, null)));
}
}
// Setting a null source effectively disconects the MediaElement.
if (source != null)
{
// keep whether we asserted permissions or not
bool elevated = false;
// get the base directory of the application; never expose this
Uri appBase = SecurityHelper.GetBaseDirectory(AppDomain.CurrentDomain);
// this extracts the URI to open
Uri uriToOpen = ResolveUri(source, appBase);
// access is allowed in the following cases (only 1 & 2 require elevation):
// 1) to any HTTPS media if app is NOT coming from HTTPS
// 2) to URI in the current directory of the fusion cache
// 3) to site of origin media
if (SecurityHelper.AreStringTypesEqual(uriToOpen.Scheme, Uri.UriSchemeHttps))
{
// target is HTTPS. Then, elevate ONLY if we are NOT coming from HTTPS (=XDomain HTTPS app to HTTPS media disallowed)
Uri appDeploymentUri = SecurityHelper.ExtractUriForClickOnceDeployedApp();
if (!SecurityHelper.AreStringTypesEqual(appDeploymentUri.Scheme, Uri.UriSchemeHttps))
{
new WebPermission(NetworkAccess.Connect, BindUriHelper.UriToString(uriToOpen)).Assert();
elevated = true;
}
}
else
{
// elevate to allow access to media in the app's directory in the fusion cache.
new FileIOPermission(FileIOPermissionAccess.Read, appBase.LocalPath).Assert();// BlessedAssert
elevated = true;
}
// demand permissions. if demands succeds, it means we are in one of the cases above.
try
{
toOpen = DemandPermissions(uriToOpen);
}
finally
{
if (elevated)
{
CodeAccessPermission.RevertAssert();
}
}
}
else
{
toOpen = null;
}
// We pass in exact same URI for which we demanded permissions so that we can be sure
// there is no discrepancy between the two.
HRESULT.Check(MILMedia.Open(_nativeMedia, toOpen));
}
