Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / Media / Renderer.cs / 3 / Renderer.cs
//------------------------------------------------------------------------------ // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: // Though called "Renderer", this is used only for the 'rendering // to a BitmapImage' case, and not when rendering to an HwndTarget. // //----------------------------------------------------------------------------- using System; using System.Windows; using System.Collections.Generic; using System.Windows.Threading; using System.Diagnostics; using MS.Internal; using System.Windows.Media; using System.Windows.Media.Composition; using MS.Win32; using System.Security; using System.Security.Permissions; namespace System.Windows.Media { static internal class Renderer { ////// Critical - unmanaged pointer arguments, access critical resources, calls unmanaged code /// [SecurityCritical] static public void Render( IntPtr pRenderTarget, DUCE.Channel channel, Visual visual, int width, int height, double dpiX, double dpiY) { Render(pRenderTarget, channel, visual, width, height, dpiX, dpiY, Matrix.Identity, Rect.Empty, false); } ////// If fRenderForBitmapEffect is true, the method calls special methods on visual /// to render it specifically for an effect to be applied to it. It excludes /// properties such as transform, clip, offset and guidelines. /// ////// Critical - unmanaged pointer arguments, access critical resources, calls unmanaged code /// [SecurityCritical] static internal void Render( IntPtr pRenderTarget, DUCE.Channel channel, Visual visual, int width, int height, double dpiX, double dpiY, Matrix worldTransform, Rect windowClip, bool fRenderForBitmapEffect ) { DUCE.Resource target = new DUCE.Resource(); DUCE.Resource root = new DUCE.Resource(); DUCE.ResourceHandle targetHandle = DUCE.ResourceHandle.Null; DUCE.ResourceHandle rootHandle = DUCE.ResourceHandle.Null; Matrix deviceTransform = new Matrix( dpiX * (1.0 / 96.0), 0, 0, dpiY * (1.0 / 96.0), 0, 0); deviceTransform = worldTransform * deviceTransform; MatrixTransform mtDeviceTransform = new MatrixTransform(deviceTransform); DUCE.ResourceHandle deviceTransformHandle = ((DUCE.IResource)mtDeviceTransform).AddRefOnChannel(channel); try { // ----------------------------------------------------------- // Create the composition target and root visual resources. target.CreateOrAddRefOnChannel(channel, DUCE.ResourceType.TYPE_GENERICRENDERTARGET); targetHandle = target.Handle; DUCE.CompositionTarget.PrintInitialize( targetHandle, pRenderTarget, width, height, channel); root.CreateOrAddRefOnChannel(channel, DUCE.ResourceType.TYPE_VISUAL); rootHandle = root.Handle; DUCE.CompositionNode.SetTransform( rootHandle, deviceTransformHandle, channel); DUCE.CompositionTarget.SetRoot( targetHandle, rootHandle, channel); channel.Commit(); // ----------------------------------------------------------- // Render the freshly created target. RenderContext renderContext = new RenderContext(); renderContext.Initialize(channel, rootHandle); visual.Precompute(); if (fRenderForBitmapEffect) { visual.RenderForBitmapEffect(renderContext, 0); } else { visual.Render(renderContext, 0); } // Mark the visible realizations. RealizationContext realizationContext = new RealizationContext(); realizationContext.WindowClip = (windowClip.IsEmpty) ? new Rect(0, 0, width, height) : windowClip; Listchannels = new List (); DUCE.ChannelSet channelSet = new DUCE.ChannelSet(); channelSet.Channel = channel; channels.Add(channelSet); realizationContext.BeginFrame(false /* full walk */, true /* walk for BitmapRenderTarget */); realizationContext.Channels = channels; realizationContext.TransformStack.Push(ref deviceTransform, /* combine */ false); if (fRenderForBitmapEffect) { visual.MarkVisibleRealizationsForBitmapEffect(realizationContext); } else { visual.MarkVisibleRealizations(realizationContext); } realizationContext.TransformStack.Pop(); // Execute the realization updates. realizationContext.ExecuteRealizationsUpdateSchedule(); // ------------------------------------------------------------ // Flush the channel and present the composition target. channel.Commit(); channel.Present(); MediaContext mediaContext = MediaContext.CurrentMediaContext; mediaContext.NotifySyncChannelMessage(channel); // // Note: RealizationContext.EndFrame does not need to be called // here because we don't cache the realization context. // } finally { // ----------------------------------------------------------- // Clean up and release the root visual. if (!rootHandle.IsNull) { DUCE.CompositionNode.RemoveAllChildren( rootHandle, channel); if (fRenderForBitmapEffect) { visual.ReleaseOnChannelForBitmapEffect(channel); } else { ((DUCE.IResource)visual).ReleaseOnChannel(channel); } root.ReleaseOnChannel(channel); } // ------------------------------------------------------------ // Release the world transform. if (!deviceTransformHandle.IsNull) { ((DUCE.IResource)mtDeviceTransform).ReleaseOnChannel(channel); } // ------------------------------------------------------------ // Clean up and release the composition target. if (!targetHandle.IsNull) { DUCE.CompositionTarget.SetRoot( targetHandle, DUCE.ResourceHandle.Null, channel); target.ReleaseOnChannel(channel); } // // Since we initiate ReleaseOnChannel from the root, that // should not enqueue any delayed release. // Debug.Assert(channel.IsRemoveAndReleaseQueueEmpty()); // ----------------------------------------------------------- // Flush the channel and present the composition target. channel.Commit(); channel.Present(); MediaContext mediaContext = MediaContext.CurrentMediaContext; mediaContext.NotifySyncChannelMessage(channel); } } } } // 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
- IProducerConsumerCollection.cs
- EventSinkHelperWriter.cs
- InteropExecutor.cs
- EntityDataSourceChangingEventArgs.cs
- DataFormats.cs
- HTMLTagNameToTypeMapper.cs
- ConfigurationErrorsException.cs
- ProtocolsConfiguration.cs
- SystemParameters.cs
- SignatureGenerator.cs
- SymbolType.cs
- GridViewCommandEventArgs.cs
- IteratorAsyncResult.cs
- InkCanvasFeedbackAdorner.cs
- ErrorHandler.cs
- ScriptModule.cs
- GridViewRowEventArgs.cs
- NativeMethods.cs
- IOThreadTimer.cs
- InkCanvasInnerCanvas.cs
- PasswordRecovery.cs
- ReliabilityContractAttribute.cs
- TableLayoutPanelCellPosition.cs
- XmlNodeReader.cs
- TextDecorationUnitValidation.cs
- WebScriptMetadataMessageEncoderFactory.cs
- SettingsBindableAttribute.cs
- Splitter.cs
- ClassImporter.cs
- ArraySet.cs
- NavigationPropertySingletonExpression.cs
- TileModeValidation.cs
- LambdaExpression.cs
- SafeNativeMethodsMilCoreApi.cs
- SkinIDTypeConverter.cs
- MetadataWorkspace.cs
- DocumentApplicationJournalEntry.cs
- SecureConversationSecurityTokenParameters.cs
- CompositionCommandSet.cs
- ServiceOperationListItemList.cs
- EpmSourcePathSegment.cs
- DesignTimeData.cs
- DataSourceViewSchemaConverter.cs
- AutomationElementIdentifiers.cs
- WebServiceTypeData.cs
- CollectionBuilder.cs
- CaseInsensitiveComparer.cs
- ServiceInstanceProvider.cs
- XmlStringTable.cs
- CustomLineCap.cs
- DataSourceConverter.cs
- CallbackValidator.cs
- HttpEncoder.cs
- BaseProcessor.cs
- PrimitiveOperationFormatter.cs
- UnsafeNativeMethods.cs
- XmlAttribute.cs
- ClientScriptManagerWrapper.cs
- XmlSerializerNamespaces.cs
- HttpHandlerActionCollection.cs
- TextTreeFixupNode.cs
- HttpResponseHeader.cs
- OdbcConnectionString.cs
- TemplateControlBuildProvider.cs
- Form.cs
- ClientBuildManagerCallback.cs
- TableColumnCollection.cs
- BeginEvent.cs
- CodeObjectCreateExpression.cs
- GreenMethods.cs
- ValueUtilsSmi.cs
- Panel.cs
- WebPartCatalogCloseVerb.cs
- SoapSchemaExporter.cs
- HashHelper.cs
- DecimalStorage.cs
- EventMap.cs
- InternalMappingException.cs
- ColumnBinding.cs
- SQLSingleStorage.cs
- EventlogProvider.cs
- FirstMatchCodeGroup.cs
- Transactions.cs
- TypeResolver.cs
- PropertyAccessVisitor.cs
- DuplexClientBase.cs
- TimeSpanOrInfiniteConverter.cs
- DecoderNLS.cs
- ServerValidateEventArgs.cs
- DiscoveryExceptionDictionary.cs
- InvalidEnumArgumentException.cs
- CapabilitiesSection.cs
- OracleConnectionFactory.cs
- MappingSource.cs
- SecurityPolicySection.cs
- XmlReflectionImporter.cs
- Recipient.cs
- SelectionRange.cs
- OracleTimeSpan.cs
- LoginDesignerUtil.cs