VideoDrawing.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / Media / VideoDrawing.cs / 1 / VideoDrawing.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
// Description: VideoDrawing represents a drawing operation that renders 
//              video into a destination rectangle.
// 
// History: 
//
//  2004/11/17 : [....] - Created it. 
//
//---------------------------------------------------------------------------

using System.Diagnostics; 

namespace System.Windows.Media 
{ 
    /// 
    /// The class definition for VideoDrawing 
    /// 
    public sealed partial class VideoDrawing : Drawing
    {
        #region Constructors 

        ///  
        /// Default VideoDrawing constructor. 
        /// Constructs an object with all properties set to their default values
        ///  
        public VideoDrawing()
        {
        }
 
        #endregion
 
        #region Internal methods 

        ///  
        /// Calls methods on the DrawingContext that are equivalent to the
        /// Drawing with the Drawing's current value.
        /// 
        internal override void WalkCurrentValue(DrawingContextWalker ctx) 
        {
            // We avoid unneccessary ShouldStopWalking checks based on assumptions 
            // about when ShouldStopWalking is set.  Guard that assumption with an 
            // assertion.  See DrawingGroup.WalkCurrentValue comment for more details.
            Debug.Assert(!ctx.ShouldStopWalking); 

            ctx.DrawVideo(
                Player,
                Rect 
                );
        } 
 
        /// 
        /// Video drawings don't require realization updates. 
        /// 
        internal override void PrecomputeCore()
        {
            RequiresRealizationUpdates = false; 
        }
 
        ///  
        /// Video drawings don't need realization updates.
        ///  
        internal override void UpdateRealizations(RealizationContext realizationContext)
        {
            Debug.Assert(RequiresRealizationUpdates == false);
        } 
        #endregion Internal methods
    } 
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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