ColorConvertedBitmap.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 / ColorConvertedBitmap.cs / 1 / ColorConvertedBitmap.cs
                        
                        
                            //------------------------------------------------------------------------------ 
//  Microsoft Avalon
//  Copyright (c) Microsoft Corporation.  All Rights Reserved.
//
//  File: ColorConvertedBitmap.cs 
//
//----------------------------------------------------------------------------- 
 

using System; 
using System.IO;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel; 
using System.ComponentModel.Design.Serialization;
using System.Reflection; 
using MS.Internal; 
using MS.Win32.PresentationCore;
using System.Security; 
using System.Security.Permissions;
using System.Diagnostics;
using System.Windows.Media;
using System.Globalization; 
using System.Runtime.InteropServices;
using System.Windows.Media.Animation; 
using System.Windows.Media.Composition; 

using SR=MS.Internal.PresentationCore.SR; 
using SRID=MS.Internal.PresentationCore.SRID;

namespace System.Windows.Media.Imaging
{ 
    #region ColorConvertedBitmap
    ///  
    /// ColorConvertedBitmap provides caching functionality for a BitmapSource. 
    /// 
    public sealed partial class ColorConvertedBitmap : Imaging.BitmapSource, ISupportInitialize 
    {
        /// 
        /// Constructor
        ///  
        public ColorConvertedBitmap() : base(true)
        { 
        } 

        ///  
        /// Construct a ColorConvertedBitmap
        /// 
        /// Input BitmapSource to color convert
        /// Source Color Context 
        /// Destination Color Context
        /// Destination Pixel format 
        public ColorConvertedBitmap(BitmapSource source, ColorContext sourceColorContext, ColorContext destinationColorContext, PixelFormat format) 
            : base(true) // Use base class virtuals
        { 
            if (source == null)
            {
                throw new ArgumentNullException("source");
            } 

            if (sourceColorContext == null) 
            { 
                throw new ArgumentNullException("sourceColorContext");
            } 

            if (destinationColorContext == null)
            {
                throw new ArgumentNullException("destinationColorContext"); 
            }
 
            _bitmapInit.BeginInit(); 

            Source = source; 
            SourceColorContext = sourceColorContext;
            DestinationColorContext = destinationColorContext;
            DestinationFormat = format;
 
            _bitmapInit.EndInit();
            FinalizeCreation(); 
        } 

        // ISupportInitialize 

        /// 
        /// Prepare the bitmap to accept initialize paramters.
        ///  
        public void BeginInit()
        { 
            WritePreamble(); 
            _bitmapInit.BeginInit();
        } 

        /// 
        /// Prepare the bitmap to accept initialize paramters.
        ///  
        /// 
        /// Critical - access critical resources 
        /// PublicOK - All inputs verified 
        /// 
        [SecurityCritical ] 
        public void EndInit()
        {
            WritePreamble();
            _bitmapInit.EndInit(); 

            if (Source == null) 
            { 
                throw new InvalidOperationException(SR.Get(SRID.Image_NoArgument, "Source"));
            } 

            if ( SourceColorContext == null)
            {
                throw new InvalidOperationException(SR.Get(SRID.Color_NullColorContext)); 
            }
 
            if (DestinationColorContext == null) 
            {
                throw new InvalidOperationException(SR.Get(SRID.Image_NoArgument, "DestinationColorContext")); 
            }

            FinalizeCreation();
        } 

        private void ClonePrequel(ColorConvertedBitmap otherColorConvertedBitmap) 
        { 
            BeginInit();
        } 

        private void ClonePostscript(ColorConvertedBitmap otherColorConvertedBitmap)
        {
            EndInit(); 
        }
 
        /// 
        /// Create the unmanaged resources
        /// 
        /// 
        /// Critical - access critical resource
        /// 
        [SecurityCritical] 
        internal override void FinalizeCreation()
        { 
            _bitmapInit.EnsureInitializedComplete(); 
            BitmapSourceSafeMILHandle wicConverter = null;
 
            HRESULT.Check(UnsafeNativeMethods.WICCodec.CreateColorTransform(
                    out wicConverter));

            lock (_syncObject) 
            {
                Guid fmtDestFmt = DestinationFormat.Guid; 
 
                HRESULT.Check(UnsafeNativeMethods.WICColorTransform.Initialize(
                        wicConverter, 
                        Source.WicSourceHandle,
                        SourceColorContext.ColorContextHandle,
                        DestinationColorContext.ColorContextHandle,
                        ref fmtDestFmt)); 
            }
 
            WicSourceHandle = wicConverter; 
            _isSourceCached = Source.IsSourceCached;
 
            CreationCompleted = true;
            UpdateCachedSettings();
        }
 
        /// 
        ///     Notification on source changing. 
        ///  
        private void SourcePropertyChangedHook(DependencyPropertyChangedEventArgs e)
        { 
            if (!e.IsASubPropertyChange)
            {
                BitmapSource newSource = e.NewValue as BitmapSource;
                _source = newSource; 
                _syncObject = (newSource != null) ? newSource.SyncObject : _bitmapInit;
            } 
        } 

        ///  
        ///     Notification on source colorcontext changing.
        /// 
        private void SourceColorContextPropertyChangedHook(DependencyPropertyChangedEventArgs e)
        { 
            if (!e.IsASubPropertyChange)
            { 
                _sourceColorContext = e.NewValue as ColorContext; 
            }
        } 

        /// 
        ///     Notification on destination colorcontext changing.
        ///  
        private void DestinationColorContextPropertyChangedHook(DependencyPropertyChangedEventArgs e)
        { 
            if (!e.IsASubPropertyChange) 
            {
                _destinationColorContext = e.NewValue as ColorContext; 
            }
        }

        ///  
        ///     Notification on destination format changing.
        ///  
        private void DestinationFormatPropertyChangedHook(DependencyPropertyChangedEventArgs e) 
        {
            if (!e.IsASubPropertyChange) 
            {
                _destinationFormat = (PixelFormat)e.NewValue;
            }
        } 

        ///  
        ///     Coerce Source 
        /// 
        private static object CoerceSource(DependencyObject d, object value) 
        {
            ColorConvertedBitmap bitmap = (ColorConvertedBitmap)d;
            if (!bitmap._bitmapInit.IsInInit)
            { 
                return bitmap._source;
            } 
            else 
            {
                return value; 
            }
        }

        ///  
        ///     Coerce SourceColorContext
        ///  
        private static object CoerceSourceColorContext(DependencyObject d, object value) 
        {
            ColorConvertedBitmap bitmap = (ColorConvertedBitmap)d; 
            if (!bitmap._bitmapInit.IsInInit)
            {
                return bitmap._sourceColorContext;
            } 
            else
            { 
                return value; 
            }
        } 

        /// 
        ///     Coerce DestinationColorContext
        ///  
        private static object CoerceDestinationColorContext(DependencyObject d, object value)
        { 
            ColorConvertedBitmap bitmap = (ColorConvertedBitmap)d; 
            if (!bitmap._bitmapInit.IsInInit)
            { 
                return bitmap._destinationColorContext;
            }
            else
            { 
                return value;
            } 
        } 

        ///  
        ///     Coerce DestinationFormat
        /// 
        private static object CoerceDestinationFormat(DependencyObject d, object value)
        { 
            ColorConvertedBitmap bitmap = (ColorConvertedBitmap)d;
            if (!bitmap._bitmapInit.IsInInit) 
            { 
                return bitmap._destinationFormat;
            } 
            else
            {
                return value;
            } 
        }
 
        #region Data members 

        private BitmapSource _source; 

        private ColorContext _sourceColorContext;

        private ColorContext _destinationColorContext; 

        private PixelFormat _destinationFormat; 
 
        #endregion
 
    }

    #endregion // ColorConvertedBitmap
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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ColorConvertedBitmap.cs source code in C# .NET

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