Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / Media / Effects / BitmapEffectDrawingContextWalker.cs / 1 / BitmapEffectDrawingContextWalker.cs
//----------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// File: BitmapEffectDrawingContextWalker.cs
//
// Description: This file contains the implementation of BitmapEffectDrawingContextWalker.
// This DrawingContextWalker is used to render the commands between
// PushEffect and Pop
//
// History:
// 07/25/2005 : [....] - Created it.
//
//---------------------------------------------------------------------------
using MS.Internal;
using MS.Utility;
using System;
using System.ComponentModel;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel.Design.Serialization;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Composition;
using System.Windows.Media.Effects;
using System.Windows.Media.Imaging;
using System.Windows.Media.Media3D;
using System.Security;
using System.Security.Permissions;
namespace System.Windows.Media.Effects
{
class BitmapEffectDrawingContextWalker : DrawingContextWalker
{
///
/// PushType enum - this defines the type of Pushes in a context, so that our
/// untyped Pops know what to Pop.
///
private enum PushType
{
Transform,
Clip,
Opacity,
OpacityMask,
BitmapEffect,
GuidelineSet,
GuidelineY1,
GuidelineY2
}
public BitmapEffectDrawingContextWalker()
{
_transform = Matrix.Identity;
_windowClip = Rect.Empty;
}
public BitmapEffectDrawingContextWalker(Matrix transform, Rect windowClip)
{
_transform = transform;
_windowClip = windowClip;
}
///
/// DrawLine -
/// Draws a line with the specified pen.
/// Note that this API does not accept a Brush, as there is no area to fill.
///
/// The Pen with which to stroke the line.
/// The start Point for the line.
/// The end Point for the line.
public override void DrawLine(
Pen pen,
Point point0,
Point point1)
{
if (_effectContext != null)
{
_effectContext.Context.DrawLine(
pen,
point0,
point1);
}
}
///
/// DrawLine -
/// Draws a line with the specified pen.
/// Note that this API does not accept a Brush, as there is no area to fill.
///
/// The Pen with which to stroke the line.
/// The start Point for the line.
/// Optional AnimationClock for point0.
/// The end Point for the line.
/// Optional AnimationClock for point1.
public override void DrawLine(
Pen pen,
Point point0,
AnimationClock point0Animations,
Point point1,
AnimationClock point1Animations)
{
if (_effectContext != null)
{
_effectContext.Context.DrawLine(
pen,
point0,
point0Animations,
point1,
point1Animations);
}
}
///
/// DrawRectangle -
/// Draw a rectangle with the provided Brush and/or Pen.
/// If both the Brush and Pen are null this call is a no-op.
///
///
/// The Brush with which to fill the rectangle.
/// This is optional, and can be null, in which case no fill is performed.
///
///
/// The Pen with which to stroke the rectangle.
/// This is optional, and can be null, in which case no stroke is performed.
///
/// The Rect to fill and/or stroke.
public override void DrawRectangle(
Brush brush,
Pen pen,
Rect rectangle)
{
if (_effectContext != null)
{
_effectContext.Context.DrawRectangle(
brush,
pen,
rectangle);
}
}
///
/// DrawRectangle -
/// Draw a rectangle with the provided Brush and/or Pen.
/// If both the Brush and Pen are null this call is a no-op.
///
///
/// The Brush with which to fill the rectangle.
/// This is optional, and can be null, in which case no fill is performed.
///
///
/// The Pen with which to stroke the rectangle.
/// This is optional, and can be null, in which case no stroke is performed.
///
/// The Rect to fill and/or stroke.
/// Optional AnimationClock for rectangle.
public override void DrawRectangle(
Brush brush,
Pen pen,
Rect rectangle,
AnimationClock rectangleAnimations)
{
if (_effectContext != null)
{
_effectContext.Context.DrawRectangle(
brush,
pen,
rectangle);
}
}
///
/// DrawRoundedRectangle -
/// Draw a rounded rectangle with the provided Brush and/or Pen.
/// If both the Brush and Pen are null this call is a no-op.
///
///
/// The Brush with which to fill the rectangle.
/// This is optional, and can be null, in which case no fill is performed.
///
///
/// The Pen with which to stroke the rectangle.
/// This is optional, and can be null, in which case no stroke is performed.
///
/// The Rect to fill and/or stroke.
///
/// The radius in the X dimension of the rounded corners of this
/// rounded Rect. This value will be clamped to the range [0..rectangle.Width/2]
///
///
/// The radius in the Y dimension of the rounded corners of this
/// rounded Rect. This value will be clamped to the range [0..rectangle.Height/2].
///
public override void DrawRoundedRectangle(
Brush brush,
Pen pen,
Rect rectangle,
Double radiusX,
Double radiusY)
{
if (_effectContext != null)
{
_effectContext.Context.DrawRoundedRectangle(
brush,
pen,
rectangle,
radiusX,
radiusY);
}
}
///
/// DrawRoundedRectangle -
/// Draw a rounded rectangle with the provided Brush and/or Pen.
/// If both the Brush and Pen are null this call is a no-op.
///
///
/// The Brush with which to fill the rectangle.
/// This is optional, and can be null, in which case no fill is performed.
///
///
/// The Pen with which to stroke the rectangle.
/// This is optional, and can be null, in which case no stroke is performed.
///
/// The Rect to fill and/or stroke.
/// Optional AnimationClock for rectangle.
///
/// The radius in the X dimension of the rounded corners of this
/// rounded Rect. This value will be clamped to the range [0..rectangle.Width/2]
///
/// Optional AnimationClock for radiusX.
///
/// The radius in the Y dimension of the rounded corners of this
/// rounded Rect. This value will be clamped to the range [0..rectangle.Height/2].
///
/// Optional AnimationClock for radiusY.
public override void DrawRoundedRectangle(
Brush brush,
Pen pen,
Rect rectangle,
AnimationClock rectangleAnimations,
Double radiusX,
AnimationClock radiusXAnimations,
Double radiusY,
AnimationClock radiusYAnimations)
{
if (_effectContext != null)
{
_effectContext.Context.DrawRoundedRectangle(
brush,
pen,
rectangle,
rectangleAnimations,
radiusX,
radiusXAnimations,
radiusY,
radiusYAnimations);
}
}
///
/// DrawEllipse -
/// Draw an ellipse with the provided Brush and/or Pen.
/// If both the Brush and Pen are null this call is a no-op.
///
///
/// The Brush with which to fill the ellipse.
/// This is optional, and can be null, in which case no fill is performed.
///
///
/// The Pen with which to stroke the ellipse.
/// This is optional, and can be null, in which case no stroke is performed.
///
///
/// The center of the ellipse to fill and/or stroke.
///
///
/// The radius in the X dimension of the ellipse.
/// The absolute value of the radius provided will be used.
///
///
/// The radius in the Y dimension of the ellipse.
/// The absolute value of the radius provided will be used.
///
public override void DrawEllipse(
Brush brush,
Pen pen,
Point center,
Double radiusX,
Double radiusY)
{
if (_effectContext != null)
{
_effectContext.Context.DrawEllipse(
brush,
pen,
center,
radiusX,
radiusY);
}
}
///
/// DrawEllipse -
/// Draw an ellipse with the provided Brush and/or Pen.
/// If both the Brush and Pen are null this call is a no-op.
///
///
/// The Brush with which to fill the ellipse.
/// This is optional, and can be null, in which case no fill is performed.
///
///
/// The Pen with which to stroke the ellipse.
/// This is optional, and can be null, in which case no stroke is performed.
///
///
/// The center of the ellipse to fill and/or stroke.
///
/// Optional AnimationClock for center.
///
/// The radius in the X dimension of the ellipse.
/// The absolute value of the radius provided will be used.
///
/// Optional AnimationClock for radiusX.
///
/// The radius in the Y dimension of the ellipse.
/// The absolute value of the radius provided will be used.
///
/// Optional AnimationClock for radiusY.
public override void DrawEllipse(
Brush brush,
Pen pen,
Point center,
AnimationClock centerAnimations,
Double radiusX,
AnimationClock radiusXAnimations,
Double radiusY,
AnimationClock radiusYAnimations)
{
if (_effectContext != null)
{
_effectContext.Context.DrawEllipse(
brush,
pen,
center,
centerAnimations,
radiusX,
radiusXAnimations,
radiusY,
radiusYAnimations);
}
}
///
/// DrawGeometry -
/// Draw a Geometry with the provided Brush and/or Pen.
/// If both the Brush and Pen are null this call is a no-op.
///
///
/// The Brush with which to fill the Geometry.
/// This is optional, and can be null, in which case no fill is performed.
///
///
/// The Pen with which to stroke the Geometry.
/// This is optional, and can be null, in which case no stroke is performed.
///
/// The Geometry to fill and/or stroke.
public override void DrawGeometry(
Brush brush,
Pen pen,
Geometry geometry)
{
if (_effectContext != null)
{
_effectContext.Context.DrawGeometry(
brush,
pen,
geometry);
}
}
///
/// DrawImage -
/// Draw an Image into the region specified by the Rect.
/// The Image will potentially be stretched and distorted to fit the Rect.
/// For more fine grained control, consider filling a Rect with an ImageBrush via
/// DrawRectangle.
///
/// The ImageSource to draw.
///
/// The Rect into which the ImageSource will be fit.
///
public override void DrawImage(
ImageSource imageSource,
Rect rectangle)
{
if (_effectContext != null)
{
_effectContext.Context.DrawImage(
imageSource,
rectangle);
}
}
///
/// DrawImage -
/// Draw an Image into the region specified by the Rect.
/// The Image will potentially be stretched and distorted to fit the Rect.
/// For more fine grained control, consider filling a Rect with an ImageBrush via
/// DrawRectangle.
///
/// The ImageSource to draw.
///
/// The Rect into which the ImageSource will be fit.
///
/// Optional AnimationClock for rectangle.
public override void DrawImage(
ImageSource imageSource,
Rect rectangle,
AnimationClock rectangleAnimations)
{
if (_effectContext != null)
{
_effectContext.Context.DrawImage(
imageSource,
rectangle,
rectangleAnimations);
}
}
///
/// DrawGlyphRun -
/// Draw a GlyphRun
///
///
/// Foreground brush to draw the GlyphRun with.
///
/// The GlyphRun to draw.
public override void DrawGlyphRun(
Brush foregroundBrush,
GlyphRun glyphRun)
{
if (_effectContext != null)
{
_effectContext.Context.DrawGlyphRun(
foregroundBrush,
glyphRun);
}
}
///
/// DrawDrawing -
/// Draw a Drawing by appending a sub-Drawing to the current Drawing.
///
/// The drawing to draw.
public override void DrawDrawing(
Drawing drawing)
{
if (_effectContext != null)
{
_effectContext.Context.DrawDrawing(drawing);
}
}
///
/// DrawVideo -
/// Draw a Video into the region specified by the Rect.
/// The Video will potentially be stretched and distorted to fit the Rect.
/// For more fine grained control, consider filling a Rect with an VideoBrush via
/// DrawRectangle.
///
/// The MediaPlayer to draw.
///
/// The Rect into which the MediaClock will be fit.
///
public override void DrawVideo(
MediaPlayer player,
Rect rectangle)
{
if (_effectContext != null)
{
_effectContext.Context.DrawVideo(
player,
rectangle);
}
}
///
/// DrawVideo -
/// Draw a Video into the region specified by the Rect.
/// The Video will potentially be stretched and distorted to fit the Rect.
/// For more fine grained control, consider filling a Rect with an VideoBrush via
/// DrawRectangle.
///
/// The MediaPlayer to draw.
///
/// The Rect into which the MediaClock will be fit.
///
/// Optional AnimationClock for rectangle.
public override void DrawVideo(
MediaPlayer player,
Rect rectangle,
AnimationClock rectangleAnimations)
{
if (_effectContext != null)
{
_effectContext.Context.DrawVideo(
player,
rectangle,
rectangleAnimations);
}
}
///
/// DrawScene3D -
/// Draw a Scene3D (internal object encapsulating a 3D scene)
///
/// The Scene3D to draw.
internal override void DrawScene3D(
Scene3D scene3D)
{
if (_effectContext != null)
{
_effectContext.Context.DrawScene3D(scene3D);
}
}
///
/// PushGuidelineSet -
/// Push a set of guidelines which will apply to all drawing operations until the
/// corresponding Pop.
///
/// The GuidelineSet to push.
public override void PushGuidelineSet(
GuidelineSet guidelines)
{
if (_effectContext != null)
{
_effectContext.Context.PushGuidelineSet(guidelines);
}
// Ensure the type stack
if (_pushTypeStack == null)
{
_pushTypeStack = new Stack(2);
}
_pushTypeStack.Push(PushType.GuidelineSet);
}
///
/// PushGuidelineY1 -
/// Explicitly push one horizontal guideline.
///
/// The coordinate of leading guideline.
internal override void PushGuidelineY1(
Double coordinate)
{
if (_effectContext != null)
{
_effectContext.Context.PushGuidelineY1(coordinate);
}
// Ensure the type stack
if (_pushTypeStack == null)
{
_pushTypeStack = new Stack(2);
}
_pushTypeStack.Push(PushType.GuidelineY1);
}
///
/// PushGuidelineY2 -
/// Explicitly push a pair of horizontal guidelines.
///
///
/// The coordinate of leading guideline.
///
///
/// The offset from leading guideline to driven guideline.
///
internal override void PushGuidelineY2(
Double leadingCoordinate,
Double offsetToDrivenCoordinate)
{
if (_effectContext != null)
{
_effectContext.Context.PushGuidelineY2(leadingCoordinate,
offsetToDrivenCoordinate);
}
// Ensure the type stack
if (_pushTypeStack == null)
{
_pushTypeStack = new Stack(2);
}
_pushTypeStack.Push(PushType.GuidelineY2);
}
///
/// Push an opacity mask
///
///
/// The opacity mask
///
public override void PushOpacityMask(Brush brush)
{
if (_effectContext != null)
{
_effectContext.Context.PushOpacityMask(brush);
}
// Ensure the type stack
if (_pushTypeStack == null)
{
_pushTypeStack = new Stack(2);
}
_pushTypeStack.Push(PushType.OpacityMask);
}
///
/// PushClip -
/// Push a clip region, which will apply to all drawing primitives until the
/// corresponding Pop call.
///
/// The Geometry to which we will clip.
public override void PushClip(
Geometry clipGeometry)
{
if (_effectContext != null)
{
_effectContext.Context.PushClip(clipGeometry);
}
// Ensure the type stack
if (_pushTypeStack == null)
{
_pushTypeStack = new Stack(2);
}
_pushTypeStack.Push(PushType.Clip);
}
///
/// PushOpacity -
/// Push an opacity which will blend the composite of all drawing primitives added
/// until the corresponding Pop call.
///
///
/// The opacity with which to blend - 0 is transparent, 1 is opaque.
///
public override void PushOpacity(
Double opacity)
{
if (_effectContext != null)
{
_effectContext.Context.PushOpacity(opacity);
}
// Ensure the type stack
if (_pushTypeStack == null)
{
_pushTypeStack = new Stack(2);
}
_pushTypeStack.Push(PushType.Opacity);
}
///
/// PushOpacity -
/// Push an opacity which will blend the composite of all drawing primitives added
/// until the corresponding Pop call.
///
///
/// The opacity with which to blend - 0 is transparent, 1 is opaque.
///
/// Optional AnimationClock for opacity.
public override void PushOpacity(
Double opacity,
AnimationClock opacityAnimations)
{
if (_effectContext != null)
{
_effectContext.Context.PushOpacity(
opacity,
opacityAnimations);
}
// Ensure the type stack
if (_pushTypeStack == null)
{
_pushTypeStack = new Stack(2);
}
_pushTypeStack.Push(PushType.Opacity);
}
///
/// PushTransform -
/// Push a Transform which will apply to all drawing operations until the corresponding
/// Pop.
///
/// The Transform to push.
public override void PushTransform(
Transform transform)
{
if (_effectContext != null)
{
_effectContext.Context.PushTransform(transform);
}
// Ensure the transform stack
if (_transformStack == null)
{
_transformStack = new Stack(2);
}
// Push the old transform.
_transformStack.Push(_transform);
// Ensure the type stack
if (_pushTypeStack == null)
{
_pushTypeStack = new Stack(2);
}
// Push the transform type
_pushTypeStack.Push(PushType.Transform);
Matrix newValue = Matrix.Identity;
// Retrieve the new transform as a matrix if it exists
if ((transform != null) && !transform.IsIdentity)
{
// If the transform is degeneraate, we can skip all instructions until the
// corresponding Pop.
newValue = transform.Value;
}
// Update the current transform
_transform = newValue * _transform;
}
///
/// PushEffect -
/// Push a BitmapEffect which will apply to all drawing operations until the
/// corresponding Pop.
///
/// The BitmapEffect to push.
/// The BitmapEffectInput.
public override void PushEffect(
BitmapEffect effect,
BitmapEffectInput effectInput)
{
// create new context
if (_effectContext == null)
{
_effectContext = new BitmapEffectDrawingContextState(effect, effectInput);
}
else
{
_effectContext.Context.PushEffect(effect, effectInput);
}
// Ensure the type stack
if (_pushTypeStack == null)
{
_pushTypeStack = new Stack(2);
}
_pushTypeStack.Push(PushType.BitmapEffect);
_effectStackDepth++;
}
///
/// Pop
///
public override void Pop(
)
{
// We must have a type stack and it must not be empty.
Debug.Assert(_pushTypeStack != null);
Debug.Assert(_pushTypeStack.Count > 0);
// Retrieve the PushType to figure out what what this Pop is.
PushType pushType = _pushTypeStack.Pop();
switch (pushType)
{
case PushType.Transform:
// We must have a Transform stack and it must not be empty.
Debug.Assert(_transformStack != null);
Debug.Assert(_transformStack.Count > 0);
// Restore the transform
_transform = _transformStack.Pop();
break;
case PushType.BitmapEffect:
Debug.Assert(_effectStackDepth > 0, "We should have pushed an effect first");
Debug.Assert(_effectContext != null, "We should have created a context");
_effectStackDepth--;
// render only if it is a toplevel effect
if (_effectStackDepth == 0)
{
_effectContext.Context.Close();
Matrix worldTransform = _transform;
BitmapSource effectImage = _effectContext.RenderBitmapEffect(ref worldTransform, _windowClip);
ImageDrawing drawing = new ImageDrawing();
if (effectImage != null)
{
drawing.ImageSource = effectImage;
drawing.Rect = new Rect(0, 0, effectImage.Width, effectImage.Height);
}
DrawingGroup group = new DrawingGroup();
group.Children.Add(drawing);
group.Transform = new MatrixTransform(worldTransform);
BitmapEffectDrawing.Drawings.Add(group);
BitmapEffectDrawing.WorldTransforms.Add(new MatrixTransform(_transform));
_effectContext = null;
}
break;
default:
// Ignore the rest
break;
}
if (_effectContext != null)
{
_effectContext.Context.Pop();
}
}
internal BitmapEffectDrawing BitmapEffectDrawing
{
get
{
if (_bitmapEffectDrawing == null)
{
_bitmapEffectDrawing = new BitmapEffectDrawing();
}
return _bitmapEffectDrawing;
}
}
#region Private Fields
private BitmapEffectDrawing _bitmapEffectDrawing;
// The current local->world Transform as a matrix.
private Matrix _transform;
private Rect _windowClip = Rect.Empty;
// The Type stack for our Push/Pop calls. This tells whether a given Pop corresponds
// to a Transform, Clip, etc.
private Stack _pushTypeStack;
// This stack contains the Matrices encountered during our walk.
// The current transform is stored in _transform and not in the Stack.
private Stack _transformStack;
// this contains the effect drawing context
private BitmapEffectDrawingContextState _effectContext;
private long _effectStackDepth;
#endregion
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- NamespaceList.cs
- ObjectDataSourceMethodEventArgs.cs
- AnnotationComponentManager.cs
- ControlBuilder.cs
- TextEditorLists.cs
- AsyncResult.cs
- ValueSerializerAttribute.cs
- RpcResponse.cs
- FigureHelper.cs
- SqlParameterizer.cs
- VirtualPathProvider.cs
- DBCSCodePageEncoding.cs
- InfoCardRSAOAEPKeyExchangeDeformatter.cs
- LocalizabilityAttribute.cs
- DelayLoadType.cs
- ProfileParameter.cs
- SerializationUtility.cs
- GridViewRowCollection.cs
- ReaderContextStackData.cs
- GroupBox.cs
- DependencyPropertyChangedEventArgs.cs
- CommunicationObject.cs
- AnnotationComponentChooser.cs
- MdiWindowListStrip.cs
- COM2IVsPerPropertyBrowsingHandler.cs
- StylusPlugin.cs
- WebScriptMetadataFormatter.cs
- TdsParserStaticMethods.cs
- PropertyGridEditorPart.cs
- AttachedPropertyBrowsableAttribute.cs
- SafeBitVector32.cs
- ClientSideProviderDescription.cs
- XPathNavigator.cs
- CodeDirectiveCollection.cs
- CurrentChangedEventManager.cs
- DataSourceIDConverter.cs
- RuleRef.cs
- ServiceHostingEnvironmentSection.cs
- FacetChecker.cs
- __TransparentProxy.cs
- PageContentCollection.cs
- InputMethodStateTypeInfo.cs
- ModuleBuilderData.cs
- ExpressionVisitor.cs
- IxmlLineInfo.cs
- sqlnorm.cs
- JsonGlobals.cs
- DropDownHolder.cs
- TextTreeText.cs
- EdmToObjectNamespaceMap.cs
- NavigatorInput.cs
- RelationshipManager.cs
- RegexCode.cs
- Token.cs
- BigIntegerStorage.cs
- X509Certificate2.cs
- BuildProviderCollection.cs
- FillErrorEventArgs.cs
- XmlSchemaSubstitutionGroup.cs
- OperationDescription.cs
- CompilationRelaxations.cs
- MethodRental.cs
- AutomationPeer.cs
- InternalPermissions.cs
- FileInfo.cs
- SessionPageStateSection.cs
- Array.cs
- AsyncSerializedWorker.cs
- XmlAnyElementAttributes.cs
- XmlNodeChangedEventManager.cs
- CodeTypeConstructor.cs
- TextTreeObjectNode.cs
- ToolboxItemWrapper.cs
- ProtocolViolationException.cs
- SessionParameter.cs
- ObjectHelper.cs
- ConfigurationErrorsException.cs
- DispatcherSynchronizationContext.cs
- ListItemCollection.cs
- UncommonField.cs
- MonitoringDescriptionAttribute.cs
- EndpointDiscoveryBehavior.cs
- PropertyIdentifier.cs
- ZeroOpNode.cs
- SetIterators.cs
- XslNumber.cs
- Dictionary.cs
- ServerValidateEventArgs.cs
- RuleSettings.cs
- NotConverter.cs
- Rotation3DKeyFrameCollection.cs
- TabletDevice.cs
- ProviderCollection.cs
- SQLSingleStorage.cs
- StorageComplexTypeMapping.cs
- HealthMonitoringSectionHelper.cs
- Matrix3D.cs
- TemplateControlBuildProvider.cs
- COMException.cs
- AppDomainProtocolHandler.cs