Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Core / CSharp / System / Windows / Media / ImageDrawing.cs / 1 / ImageDrawing.cs
//---------------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // Description: ImageDrawing represents a drawing operation that renders // an image into a destination rectangle. // // History: // // 2004/11/17 : timothyc - Created it. // //--------------------------------------------------------------------------- using System.Diagnostics; using System.Windows.Media.Imaging; using MS.Internal; namespace System.Windows.Media { ////// ImageDrawing represents a drawing operation that renders an image into /// a destination rectangle /// public sealed partial class ImageDrawing : Drawing { #region Constructors ////// Default ImageDrawing constructor. /// Constructs an object with all properties set to their default values /// public ImageDrawing() { } ////// Two-argument ImageDrawing constructor. /// Constructs an object with the ImageSource and Rect properties /// set to the value of their respective arguments. /// public ImageDrawing(ImageSource imageSource, Rect rect) { ImageSource = imageSource; Rect = rect; } #endregion #region Internal methods ////// Calls methods on the DrawingContext that are equivalent to the /// Drawing with the Drawing's current value. /// internal override void WalkCurrentValue(DrawingContextWalker ctx) { // We avoid unneccessary ShouldStopWalking checks based on assumptions // about when ShouldStopWalking is set. Guard that assumption with an // assertion. See DrawingGroup.WalkCurrentValue comment for more details. ctx.DrawImage( ImageSource, Rect ); } ////// Image drawings require realization updates if the image source is a DrawingImage. /// internal override void PrecomputeCore() { ImageSource source = ImageSource; if (source != null) { source.Precompute(); RequiresRealizationUpdates = source.RequiresRealizationUpdates; } else { RequiresRealizationUpdates = false; } } ////// Pushes realization updates into DrawingImage ImageSources. /// internal override void UpdateRealizations(RealizationContext realizationContext) { if (RequiresRealizationUpdates) { ImageSource imageSource = ImageSource; Debug.Assert(imageSource != null, "Otherwise RequiresRealizationUpdates would be false."); Rect rectangle = Rect; Size imageSize = imageSource.Size; if (!DoubleUtil.AreClose(imageSize.Width, 0) && !DoubleUtil.AreClose(imageSize.Height, 0)) { Matrix scale = Matrix.CreateScaling( rectangle.Width / imageSize.Width, rectangle.Height / imageSize.Height); realizationContext.TransformStack.Push(ref scale, true); imageSource.UpdateRealizations(realizationContext); realizationContext.TransformStack.Pop(); } } } #endregion Internal methods } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // Description: ImageDrawing represents a drawing operation that renders // an image into a destination rectangle. // // History: // // 2004/11/17 : timothyc - Created it. // //--------------------------------------------------------------------------- using System.Diagnostics; using System.Windows.Media.Imaging; using MS.Internal; namespace System.Windows.Media { ////// ImageDrawing represents a drawing operation that renders an image into /// a destination rectangle /// public sealed partial class ImageDrawing : Drawing { #region Constructors ////// Default ImageDrawing constructor. /// Constructs an object with all properties set to their default values /// public ImageDrawing() { } ////// Two-argument ImageDrawing constructor. /// Constructs an object with the ImageSource and Rect properties /// set to the value of their respective arguments. /// public ImageDrawing(ImageSource imageSource, Rect rect) { ImageSource = imageSource; Rect = rect; } #endregion #region Internal methods ////// Calls methods on the DrawingContext that are equivalent to the /// Drawing with the Drawing's current value. /// internal override void WalkCurrentValue(DrawingContextWalker ctx) { // We avoid unneccessary ShouldStopWalking checks based on assumptions // about when ShouldStopWalking is set. Guard that assumption with an // assertion. See DrawingGroup.WalkCurrentValue comment for more details. ctx.DrawImage( ImageSource, Rect ); } ////// Image drawings require realization updates if the image source is a DrawingImage. /// internal override void PrecomputeCore() { ImageSource source = ImageSource; if (source != null) { source.Precompute(); RequiresRealizationUpdates = source.RequiresRealizationUpdates; } else { RequiresRealizationUpdates = false; } } ////// Pushes realization updates into DrawingImage ImageSources. /// internal override void UpdateRealizations(RealizationContext realizationContext) { if (RequiresRealizationUpdates) { ImageSource imageSource = ImageSource; Debug.Assert(imageSource != null, "Otherwise RequiresRealizationUpdates would be false."); Rect rectangle = Rect; Size imageSize = imageSource.Size; if (!DoubleUtil.AreClose(imageSize.Width, 0) && !DoubleUtil.AreClose(imageSize.Height, 0)) { Matrix scale = Matrix.CreateScaling( rectangle.Width / imageSize.Width, rectangle.Height / imageSize.Height); realizationContext.TransformStack.Push(ref scale, true); imageSource.UpdateRealizations(realizationContext); realizationContext.TransformStack.Pop(); } } } #endregion Internal methods } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- DateTimeFormatInfoScanner.cs
- SchemaElementLookUpTable.cs
- DbConnectionPoolGroupProviderInfo.cs
- SafeUserTokenHandle.cs
- ChangeProcessor.cs
- WebEncodingValidator.cs
- MailMessageEventArgs.cs
- XmlObjectSerializerWriteContextComplexJson.cs
- ByteRangeDownloader.cs
- SQLInt32Storage.cs
- ZipFileInfo.cs
- CompilationLock.cs
- ParserExtension.cs
- Common.cs
- ConsumerConnectionPointCollection.cs
- AddDataControlFieldDialog.cs
- XPathScanner.cs
- ClockController.cs
- ItemChangedEventArgs.cs
- FormatterConverter.cs
- HttpAsyncResult.cs
- TextPointer.cs
- LingerOption.cs
- SortDescription.cs
- ConfigurationSectionCollection.cs
- iisPickupDirectory.cs
- TextBounds.cs
- ListViewItem.cs
- DataGridState.cs
- mansign.cs
- SByte.cs
- AtomParser.cs
- EntityContainer.cs
- ToolStripDropDown.cs
- WarningException.cs
- RoutedUICommand.cs
- ILGenerator.cs
- AttachedPropertiesService.cs
- MasterPage.cs
- MembershipUser.cs
- FastEncoderWindow.cs
- ParameterReplacerVisitor.cs
- PreProcessInputEventArgs.cs
- recordstate.cs
- CommandLineParser.cs
- ProcessModelInfo.cs
- SelectionChangedEventArgs.cs
- ToolStripSystemRenderer.cs
- DataGridViewComboBoxEditingControl.cs
- AddInIpcChannel.cs
- AttachedPropertyBrowsableAttribute.cs
- ReferenceEqualityComparer.cs
- PropertyEntry.cs
- DebugInfo.cs
- StructuredProperty.cs
- IISUnsafeMethods.cs
- FocusTracker.cs
- SqlGenerator.cs
- MembershipUser.cs
- NonBatchDirectoryCompiler.cs
- KeyConverter.cs
- Calendar.cs
- LowerCaseStringConverter.cs
- DataBindingCollectionEditor.cs
- CodeDOMUtility.cs
- Grid.cs
- Int32Converter.cs
- UnionCqlBlock.cs
- MimeMapping.cs
- KeyGestureValueSerializer.cs
- GeneralEndpointIdentity.cs
- ColorPalette.cs
- xsdvalidator.cs
- BaseTemplateParser.cs
- ECDsaCng.cs
- File.cs
- Stack.cs
- DbConnectionHelper.cs
- WebPartsPersonalizationAuthorization.cs
- EntityConnectionStringBuilder.cs
- BoundField.cs
- GetPageCompletedEventArgs.cs
- OracleParameterBinding.cs
- GregorianCalendarHelper.cs
- SqlAggregateChecker.cs
- ObjectDataSourceView.cs
- IncrementalCompileAnalyzer.cs
- FlowDocumentPageViewerAutomationPeer.cs
- ThicknessAnimation.cs
- BinaryHeap.cs
- BehaviorService.cs
- BoolExpr.cs
- EventLogger.cs
- EntryPointNotFoundException.cs
- IPGlobalProperties.cs
- XmlChildNodes.cs
- AssemblyInfo.cs
- ObfuscateAssemblyAttribute.cs
- DynamicQueryableWrapper.cs
- MonitorWrapper.cs