Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Core / CSharp / System / Windows / Media / Imaging / BitmapVisualManager.cs / 1 / BitmapVisualManager.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2003 // // File: BitmapVisualManager.cs // //----------------------------------------------------------------------------- using System; using System.Windows; using System.Threading; using System.Windows.Threading; using System.Diagnostics; using System.Collections; using System.Runtime.InteropServices; using System.IO; using MS.Internal; using System.Security; using System.Security.Permissions; using System.Windows.Media; using System.Windows.Media.Composition; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; using MS.Win32.PresentationCore; namespace System.Windows.Media.Imaging { #region public class BitmapVisualManager ////// BitmapVisualManager holds state and context for a drawing a visual to an bitmap. /// internal class BitmapVisualManager : DispatcherObject { #region Constructors private BitmapVisualManager() { } ////// Create an BitmapVisualManager for drawing a visual to the bitmap. /// /// Where the resulting bitmap is rendered public BitmapVisualManager(RenderTargetBitmap bitmapTarget) { if (bitmapTarget == null) { throw new ArgumentNullException("bitmapTarget"); } if (bitmapTarget.IsFrozen) { throw new ArgumentException(SR.Get(SRID.Image_CantBeFrozen, null)); } _bitmapTarget = bitmapTarget; } #endregion #region Public methods ////// Render visual to printer. /// /// Root of the visual to render public void Render(Visual visual) { Render(visual, Matrix.Identity, Rect.Empty, false); } ////// Render visual to printer. /// /// Root of the visual to render /// World transform to apply to the root visual /// The window clip of the outermost window or Empty /// True if we are rendering the visual /// to apply an effect to it /// ////// Critical - Deals with bitmap handles /// TreatAsSafe - validates all parameters, uses safe wrappers /// [SecurityCritical,SecurityTreatAsSafe] internal void Render(Visual visual, Matrix worldTransform, Rect windowClip, bool fRenderForBitmapEffect) { 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, fRenderForBitmapEffect); // // Release the synchronous channel. This way we can // re-use that channel later. // mctx.ReleaseSyncChannel(channel); } finally { UnsafeNativeMethods.MILUnknown.ReleaseInterface(ref pIRenderTargetBitmap); } _bitmapTarget.RenderTargetContentsChanged(); } #endregion #region Member Variables private RenderTargetBitmap _bitmapTarget = null; #endregion } #endregion } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation, 2003 // // File: BitmapVisualManager.cs // //----------------------------------------------------------------------------- using System; using System.Windows; using System.Threading; using System.Windows.Threading; using System.Diagnostics; using System.Collections; using System.Runtime.InteropServices; using System.IO; using MS.Internal; using System.Security; using System.Security.Permissions; using System.Windows.Media; using System.Windows.Media.Composition; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; using MS.Win32.PresentationCore; namespace System.Windows.Media.Imaging { #region public class BitmapVisualManager ////// BitmapVisualManager holds state and context for a drawing a visual to an bitmap. /// internal class BitmapVisualManager : DispatcherObject { #region Constructors private BitmapVisualManager() { } ////// Create an BitmapVisualManager for drawing a visual to the bitmap. /// /// Where the resulting bitmap is rendered public BitmapVisualManager(RenderTargetBitmap bitmapTarget) { if (bitmapTarget == null) { throw new ArgumentNullException("bitmapTarget"); } if (bitmapTarget.IsFrozen) { throw new ArgumentException(SR.Get(SRID.Image_CantBeFrozen, null)); } _bitmapTarget = bitmapTarget; } #endregion #region Public methods ////// Render visual to printer. /// /// Root of the visual to render public void Render(Visual visual) { Render(visual, Matrix.Identity, Rect.Empty, false); } ////// Render visual to printer. /// /// Root of the visual to render /// World transform to apply to the root visual /// The window clip of the outermost window or Empty /// True if we are rendering the visual /// to apply an effect to it /// ////// Critical - Deals with bitmap handles /// TreatAsSafe - validates all parameters, uses safe wrappers /// [SecurityCritical,SecurityTreatAsSafe] internal void Render(Visual visual, Matrix worldTransform, Rect windowClip, bool fRenderForBitmapEffect) { 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, fRenderForBitmapEffect); // // Release the synchronous channel. This way we can // re-use that channel later. // mctx.ReleaseSyncChannel(channel); } finally { UnsafeNativeMethods.MILUnknown.ReleaseInterface(ref pIRenderTargetBitmap); } _bitmapTarget.RenderTargetContentsChanged(); } #endregion #region Member Variables private RenderTargetBitmap _bitmapTarget = null; #endregion } #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
- MsmqQueue.cs
- AutomationElementIdentifiers.cs
- RSAOAEPKeyExchangeFormatter.cs
- LinkButton.cs
- ByteViewer.cs
- SecurityPolicySection.cs
- HebrewCalendar.cs
- XmlDataSourceView.cs
- ToolStripContainerDesigner.cs
- VisualBasic.cs
- HttpModule.cs
- TextStore.cs
- ConstructorBuilder.cs
- SqlUserDefinedAggregateAttribute.cs
- NetworkCredential.cs
- WindowsEditBoxRange.cs
- XpsThumbnail.cs
- GuidConverter.cs
- Line.cs
- ObjectDisposedException.cs
- DynamicQueryStringParameter.cs
- JsonUriDataContract.cs
- StylusEventArgs.cs
- BaseHashHelper.cs
- XPathException.cs
- MultipleViewPattern.cs
- OdbcError.cs
- WebPartEventArgs.cs
- GridViewRowEventArgs.cs
- CodeCatchClauseCollection.cs
- GeometryCombineModeValidation.cs
- TextProperties.cs
- ServicePointManagerElement.cs
- CounterSample.cs
- IsolationInterop.cs
- WindowsRegion.cs
- DataGridViewComboBoxCell.cs
- ReadOnlyHierarchicalDataSourceView.cs
- QueryableDataSource.cs
- SqlDataReader.cs
- DateTimeConverter2.cs
- NamedObject.cs
- XPathNodeIterator.cs
- RijndaelManaged.cs
- RelationshipType.cs
- XmlTextAttribute.cs
- IFlowDocumentViewer.cs
- PrePostDescendentsWalker.cs
- EntityWithChangeTrackerStrategy.cs
- _FixedSizeReader.cs
- DataColumnMappingCollection.cs
- CodeSubDirectory.cs
- SqlNodeAnnotations.cs
- GregorianCalendar.cs
- NativeMethods.cs
- MsmqBindingFilter.cs
- ScrollChrome.cs
- ResourceExpressionEditorSheet.cs
- Window.cs
- FilterUserControlBase.cs
- StylusButtonEventArgs.cs
- CollectionViewGroupRoot.cs
- RealizationDrawingContextWalker.cs
- Int32.cs
- IncrementalCompileAnalyzer.cs
- UserInitiatedNavigationPermission.cs
- MimeMultiPart.cs
- ServicePoint.cs
- TraceEventCache.cs
- CaseExpr.cs
- HttpListenerContext.cs
- MultiBinding.cs
- TogglePattern.cs
- TryExpression.cs
- DefaultTraceListener.cs
- TextTreeExtractElementUndoUnit.cs
- PropertyCondition.cs
- SqlTypeConverter.cs
- LayoutDump.cs
- DetailsViewPagerRow.cs
- StructuralCache.cs
- KeyEventArgs.cs
- OleDbInfoMessageEvent.cs
- GatewayDefinition.cs
- XPathMultyIterator.cs
- QuinticEase.cs
- ProviderException.cs
- ListViewGroup.cs
- CodeDOMUtility.cs
- HttpHandlerActionCollection.cs
- AtomicFile.cs
- DirectoryObjectSecurity.cs
- ExpressionEditorAttribute.cs
- X509ThumbprintKeyIdentifierClause.cs
- ClrPerspective.cs
- XPathNavigator.cs
- BamlRecordReader.cs
- FloatUtil.cs
- ProcessModule.cs
- VariableQuery.cs