Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Core / CSharp / System / Windows / Media / Imaging / ImagingCache.cs / 1 / ImagingCache.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation // // File: ImagingCache.cs // //----------------------------------------------------------------------------- using System; using System.IO; using System.Collections; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Reflection; using MS.Internal; using System.Diagnostics; using System.Windows.Media; using System.Globalization; using System.Security; using System.Security.Permissions; using System.Runtime.InteropServices; using System.Windows.Media.Animation; using System.Windows.Media.Composition; using System.Windows.Media.Imaging; using MS.Win32; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace System.Windows.Media.Imaging { #region ImagingCache /// /// ImagingCache provides caching for different Imaging objects /// Caches are thread-safe. /// internal static class ImagingCache { #region Methods /// Adds an object to the image cache internal static void AddToImageCache(Uri uri, object obj) { AddToCache(uri, obj, _imageCache); } /// Removes an object from the image cache internal static void RemoveFromImageCache(Uri uri) { RemoveFromCache(uri, _imageCache); } /// Get object from the image cache internal static object CheckImageCache(Uri uri) { return CheckCache(uri, _imageCache); } /// Adds an object to the decoder cache internal static void AddToDecoderCache(Uri uri, object obj) { AddToCache(uri, obj, _decoderCache); } /// Removes an object from the decoder cache internal static void RemoveFromDecoderCache(Uri uri) { RemoveFromCache(uri, _decoderCache); } /// Get object from the image cache internal static object CheckDecoderCache(Uri uri) { return CheckCache(uri, _decoderCache); } /// Adds an object to a given table private static void AddToCache(Uri uri, object obj, Hashtable table) { lock(table) { // if entry is already there, exit if (table.Contains(uri)) { return; } // if the table has reached the max size, try to see if we can reduce its size if (table.Count == MAX_CACHE_SIZE) { ArrayList al = new ArrayList(); foreach (DictionaryEntry de in table) { // if the value is a WeakReference that has been GC'd, remove it WeakReference weakRef = de.Value as WeakReference; if ((weakRef != null) && (weakRef.Target == null)) { al.Add(de.Key); } } foreach (object o in al) { table.Remove(o); } } // if table is still maxed out, exit if (table.Count == MAX_CACHE_SIZE) { return; } // add it table[uri] = obj; } } /// Removes an object from a given table private static void RemoveFromCache(Uri uri, Hashtable table) { lock(table) { // if entry is there, remove it if (table.Contains(uri)) { table.Remove(uri); } } } /// Return an object from a given table private static object CheckCache(Uri uri, Hashtable table) { lock(table) { return table[uri]; } } #endregion #region Data Members /// image cache private static Hashtable _imageCache = new Hashtable(); /// decoder cache private static Hashtable _decoderCache = new Hashtable(); /// max size to limit the cache private static int MAX_CACHE_SIZE = 300; #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 // // File: ImagingCache.cs // //----------------------------------------------------------------------------- using System; using System.IO; using System.Collections; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Reflection; using MS.Internal; using System.Diagnostics; using System.Windows.Media; using System.Globalization; using System.Security; using System.Security.Permissions; using System.Runtime.InteropServices; using System.Windows.Media.Animation; using System.Windows.Media.Composition; using System.Windows.Media.Imaging; using MS.Win32; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace System.Windows.Media.Imaging { #region ImagingCache /// /// ImagingCache provides caching for different Imaging objects /// Caches are thread-safe. /// internal static class ImagingCache { #region Methods /// Adds an object to the image cache internal static void AddToImageCache(Uri uri, object obj) { AddToCache(uri, obj, _imageCache); } /// Removes an object from the image cache internal static void RemoveFromImageCache(Uri uri) { RemoveFromCache(uri, _imageCache); } /// Get object from the image cache internal static object CheckImageCache(Uri uri) { return CheckCache(uri, _imageCache); } /// Adds an object to the decoder cache internal static void AddToDecoderCache(Uri uri, object obj) { AddToCache(uri, obj, _decoderCache); } /// Removes an object from the decoder cache internal static void RemoveFromDecoderCache(Uri uri) { RemoveFromCache(uri, _decoderCache); } /// Get object from the image cache internal static object CheckDecoderCache(Uri uri) { return CheckCache(uri, _decoderCache); } /// Adds an object to a given table private static void AddToCache(Uri uri, object obj, Hashtable table) { lock(table) { // if entry is already there, exit if (table.Contains(uri)) { return; } // if the table has reached the max size, try to see if we can reduce its size if (table.Count == MAX_CACHE_SIZE) { ArrayList al = new ArrayList(); foreach (DictionaryEntry de in table) { // if the value is a WeakReference that has been GC'd, remove it WeakReference weakRef = de.Value as WeakReference; if ((weakRef != null) && (weakRef.Target == null)) { al.Add(de.Key); } } foreach (object o in al) { table.Remove(o); } } // if table is still maxed out, exit if (table.Count == MAX_CACHE_SIZE) { return; } // add it table[uri] = obj; } } /// Removes an object from a given table private static void RemoveFromCache(Uri uri, Hashtable table) { lock(table) { // if entry is there, remove it if (table.Contains(uri)) { table.Remove(uri); } } } /// Return an object from a given table private static object CheckCache(Uri uri, Hashtable table) { lock(table) { return table[uri]; } } #endregion #region Data Members /// image cache private static Hashtable _imageCache = new Hashtable(); /// decoder cache private static Hashtable _decoderCache = new Hashtable(); /// max size to limit the cache private static int MAX_CACHE_SIZE = 300; #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
- MultiPageTextView.cs
- ManagementObjectCollection.cs
- SoapEnumAttribute.cs
- PartialCachingAttribute.cs
- ColumnHeaderConverter.cs
- Policy.cs
- TrustManager.cs
- _SpnDictionary.cs
- BaseAppDomainProtocolHandler.cs
- ClientType.cs
- BaseValidatorDesigner.cs
- IDictionary.cs
- ClientType.cs
- BmpBitmapEncoder.cs
- XmlSerializerVersionAttribute.cs
- ControlUtil.cs
- RegisteredHiddenField.cs
- _LazyAsyncResult.cs
- RegistrationServices.cs
- ElementsClipboardData.cs
- MouseCaptureWithinProperty.cs
- DataBoundControlHelper.cs
- ResourceExpressionBuilder.cs
- XmlSchemaImporter.cs
- ObjectQuery_EntitySqlExtensions.cs
- LambdaExpression.cs
- assemblycache.cs
- ServiceModelConfigurationSectionCollection.cs
- ProcessThreadDesigner.cs
- CodeDomComponentSerializationService.cs
- DataSourceSerializationException.cs
- FacetValueContainer.cs
- adornercollection.cs
- SettingsContext.cs
- LinqDataSourceView.cs
- KeysConverter.cs
- ApplicationBuildProvider.cs
- SimpleRecyclingCache.cs
- TableParaClient.cs
- InstanceCollisionException.cs
- TransformationRules.cs
- InstanceCreationEditor.cs
- DesignerActionPanel.cs
- RadioButtonStandardAdapter.cs
- XmlNavigatorStack.cs
- SimpleWorkerRequest.cs
- SystemIPAddressInformation.cs
- Model3DCollection.cs
- EventWaitHandleSecurity.cs
- MimeFormatExtensions.cs
- OracleSqlParser.cs
- XmlQualifiedName.cs
- DefaultBinder.cs
- IndicFontClient.cs
- WebBrowserNavigatingEventHandler.cs
- SoapIncludeAttribute.cs
- RouteValueExpressionBuilder.cs
- PrintingPermission.cs
- MatrixAnimationUsingKeyFrames.cs
- EncodingStreamWrapper.cs
- WebServiceMethodData.cs
- EntityCodeGenerator.cs
- EntityDataSourceState.cs
- RepeaterItemCollection.cs
- ISSmlParser.cs
- RouteData.cs
- FileLevelControlBuilderAttribute.cs
- ScriptManager.cs
- ThrowHelper.cs
- Scalars.cs
- DecoderReplacementFallback.cs
- AttachedPropertyMethodSelector.cs
- EmptyCollection.cs
- WebMessageEncodingElement.cs
- OdbcErrorCollection.cs
- SqlDataSourceCommandParser.cs
- GridSplitter.cs
- HttpRuntime.cs
- SiteMapNodeItemEventArgs.cs
- PassportPrincipal.cs
- ProvidersHelper.cs
- GlyphTypeface.cs
- SqlClientWrapperSmiStream.cs
- Point4DValueSerializer.cs
- WebPartMenuStyle.cs
- InvalidateEvent.cs
- UpdateExpressionVisitor.cs
- XmlSecureResolver.cs
- XmlAttributes.cs
- Profiler.cs
- WmlObjectListAdapter.cs
- ArraySubsetEnumerator.cs
- ProviderSettingsCollection.cs
- XmlSiteMapProvider.cs
- TableItemProviderWrapper.cs
- MasterPageParser.cs
- SHA384Managed.cs
- unitconverter.cs
- Listbox.cs
- SqlBulkCopy.cs