InplaceBitmapMetadataWriter.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / Media / Imaging / InplaceBitmapMetadataWriter.cs / 1 / InplaceBitmapMetadataWriter.cs
                        
                        
                            //------------------------------------------------------------------------------ 
//  Microsoft Avalon
//  Copyright (c) Microsoft Corporation, All Rights Reserved
//
//  File: InPlaceBitmapMetadataWriter.cs 
//
//----------------------------------------------------------------------------- 
 
using System;
using System.Collections; 
using System.Collections.Generic;
using System.Collections.Specialized;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization; 
using System.Reflection;
using MS.Internal; 
using MS.Win32.PresentationCore; 
using System.Diagnostics;
using System.Globalization; 
using System.Runtime.InteropServices;
using System.Xml;
using System.IO;
using System.Security; 
using System.Security.Permissions;
using System.Windows.Media.Imaging; 
using System.Windows.Threading; 
using System.Text;
using MS.Internal.PresentationCore;                        // SecurityHelper 

namespace System.Windows.Media.Imaging
{
    #region InPlaceBitmapMetadataWriter 

    ///  
    /// Metadata Class for BitmapImage. 
    /// 
    sealed public partial class InPlaceBitmapMetadataWriter : BitmapMetadata 
    {
        #region Constructors

        ///  
        ///
        ///  
        private InPlaceBitmapMetadataWriter() 
        {
        } 

        /// 
        ///
        ///  
        /// 
        /// Critical - Accesses critical resources 
        ///  
        [SecurityCritical]
        internal InPlaceBitmapMetadataWriter( 
            SafeMILHandle /* IWICFastMetadataEncoder */ fmeHandle,
            SafeMILHandle /* IWICMetadataQueryWriter */ metadataHandle,
            object syncObject
        ) : base(metadataHandle, false, false, syncObject) 
        {
            _fmeHandle = fmeHandle; 
        } 

        ///  
        ///
        /// 
        /// 
        /// Critical - Accesses unmanaged code 
        /// TreatAsSafe - inputs are verified or safe
        ///  
        [SecurityCritical, SecurityTreatAsSafe] 
        static internal InPlaceBitmapMetadataWriter CreateFromFrameDecode(BitmapSourceSafeMILHandle frameHandle, object syncObject)
        { 
            Invariant.Assert(frameHandle != null);

            SafeMILHandle /* IWICFastMetadataEncoder */ fmeHandle = null;
            SafeMILHandle /* IWICMetadataQueryWriter */ metadataHandle = null; 

            using (FactoryMaker factoryMaker = new FactoryMaker()) 
            { 
                lock (syncObject)
                { 
                    HRESULT.Check(UnsafeNativeMethods.WICImagingFactory.CreateFastMetadataEncoderFromFrameDecode(
                            factoryMaker.ImagingFactoryPtr,
                            frameHandle,
                            out fmeHandle)); 
                }
            } 
 
            HRESULT.Check(UnsafeNativeMethods.WICFastMetadataEncoder.GetMetadataQueryWriter(
                    fmeHandle, 
                    out metadataHandle));

            return new InPlaceBitmapMetadataWriter(fmeHandle, metadataHandle, syncObject);
        } 

        ///  
        /// 
        /// 
        ///  
        /// Critical - Accesses unmanaged code
        /// TreatAsSafe - inputs are verified or safe
        /// 
        [SecurityCritical, SecurityTreatAsSafe] 
        static internal InPlaceBitmapMetadataWriter CreateFromDecoder(SafeMILHandle decoderHandle, object syncObject)
        { 
            Invariant.Assert(decoderHandle != null); 

            SafeMILHandle /* IWICFastMetadataEncoder */ fmeHandle = null; 
            SafeMILHandle /* IWICMetadataQueryWriter */ metadataHandle = null;

            using (FactoryMaker factoryMaker = new FactoryMaker())
            { 
                lock (syncObject)
                { 
                    HRESULT.Check(UnsafeNativeMethods.WICImagingFactory.CreateFastMetadataEncoderFromDecoder( 
                            factoryMaker.ImagingFactoryPtr,
                            decoderHandle, 
                            out fmeHandle));
                }
            }
 
            HRESULT.Check(UnsafeNativeMethods.WICFastMetadataEncoder.GetMetadataQueryWriter(
                    fmeHandle, 
                    out metadataHandle)); 

            return new InPlaceBitmapMetadataWriter(fmeHandle, metadataHandle, syncObject); 
        }

        /// 
        /// 
        /// 
        ///  
        /// Critical - Accesses unmanaged code 
        /// PublicOK - inputs are verified or safe
        ///  
        [SecurityCritical ]
        public bool TrySave()
        {
            int hr; 

            Invariant.Assert(_fmeHandle != null); 
 
            lock (SyncObject)
            { 
                hr = UnsafeNativeMethods.WICFastMetadataEncoder.Commit(_fmeHandle);
            }

            return HRESULT.Succeeded(hr); 
        }
 
        #endregion 

        #region Freezable 

        /// 
        ///     Shadows inherited Copy() with a strongly typed
        ///     version for convenience. 
        /// 
        public new InPlaceBitmapMetadataWriter Clone() 
        { 
            return (InPlaceBitmapMetadataWriter)base.Clone();
        } 

        /// 
        /// Implementation of Freezable.CreateInstanceCore.
        ///  
        /// The new Freezable.
        protected override Freezable CreateInstanceCore() 
        { 
            throw new InvalidOperationException(SR.Get(SRID.Image_InplaceMetadataNoCopy));
        } 

        /// 
        /// Implementation of Freezable.CloneCore.
        ///  
        protected override void CloneCore(Freezable sourceFreezable)
        { 
            throw new InvalidOperationException(SR.Get(SRID.Image_InplaceMetadataNoCopy)); 
        }
 
        /// 
        /// Implementation of Freezable.CloneCurrentValueCore.
        /// 
        protected override void CloneCurrentValueCore(Freezable sourceFreezable) 
        {
            throw new InvalidOperationException(SR.Get(SRID.Image_InplaceMetadataNoCopy)); 
        } 

        ///  
        /// Implementation of Freezable.GetAsFrozenCore.
        /// 
        protected override void GetAsFrozenCore(Freezable sourceFreezable)
        { 
            throw new InvalidOperationException(SR.Get(SRID.Image_InplaceMetadataNoCopy));
        } 
 
        /// 
        /// Implementation of Freezable.GetCurrentValueAsFrozenCore. 
        /// 
        protected override void GetCurrentValueAsFrozenCore(Freezable sourceFreezable)
        {
            throw new InvalidOperationException(SR.Get(SRID.Image_InplaceMetadataNoCopy)); 
        }
        #endregion 
 
        /// 
        /// Critical - pointer to an unmanaged object that methods are called on. 
        /// 
        [SecurityCritical]
        private SafeMILHandle _fmeHandle;
    } 

    #endregion 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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InplaceBitmapMetadataWriter.cs source code in C# .NET

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