BitmapEffectGeneralTransform.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / Media / Effects / BitmapEffectGeneralTransform.cs / 1 / BitmapEffectGeneralTransform.cs
                        
                        
                            /****************************************************************************\ 
*
* File: BitmapEffectGeneralTransform.cs
*
* Description: 
* BitmapEffectGeneralTransform.cs defines the "BitmapEffectGeneralTransform" object
* 
* Copyright (C) 2002 by Microsoft Corporation.  All rights reserved. 
*
\***************************************************************************/ 

using MS.Internal;
using System;
using System.Collections; 
using System.ComponentModel;
using System.ComponentModel.Design.Serialization; 
using System.Diagnostics; 
using System.Globalization;
using System.Reflection; 
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Permissions;
using System.Windows; 
using System.Windows.Media.Animation;
using System.Windows.Media.Composition; 
using System.Windows.Markup; 
using MS.Internal.PresentationCore;
using SR = MS.Internal.PresentationCore.SR; 
using SRID = MS.Internal.PresentationCore.SRID;

namespace System.Windows.Media.Effects
{ 
    /// 
    /// This is a general transform wrapper for a bitmap effect 
    ///  
    internal partial class BitmapEffectGeneralTransform : GeneralTransform
    { 
        private bool _fInverse = false;
        private Rect _visualBounds = Rect.Empty;

        ///  
        /// Constructor
        ///  
        public BitmapEffectGeneralTransform() { } 

        ///  
        /// Constructor
        /// 
        /// bitmap effect
        /// bitmap effect input 
        /// Inverse transform
        /// The bounds of the visual for 
        public BitmapEffectGeneralTransform(BitmapEffect effect, BitmapEffectInput input, bool fInverse, Rect visualBounds) 
        {
            if (effect == null) 
                throw new InvalidOperationException(SR.Get(SRID.Transform_No_Effect, null));

            this.BitmapEffect = effect.Clone();
            this.BitmapEffectInput = (input != null) ? input.Clone() : new BitmapEffectInput(); 
            _fInverse = fInverse;
            _visualBounds = visualBounds; 
        } 

        ///  
        /// Returns true if the transform is an inverse
        /// 
        internal bool IsInverse
        { 
            get { return _fInverse; }
            set { _fInverse = value; } 
        } 

        ///  
        /// Implementation of Freezable.CloneCore.
        /// 
        /// 
        protected override void CloneCore(Freezable sourceFreezable) 
        {
            BitmapEffectGeneralTransform transform = (BitmapEffectGeneralTransform)sourceFreezable; 
            base.CloneCore(sourceFreezable); 
            CopyCommon(transform);
        } 


        /// 
        /// Implementation of Freezable.CloneCurrentValueCore. 
        /// 
        ///  
        protected override void CloneCurrentValueCore(Freezable sourceFreezable) 
        {
            BitmapEffectGeneralTransform transform = (BitmapEffectGeneralTransform)sourceFreezable; 
            base.CloneCurrentValueCore(sourceFreezable);
            CopyCommon(transform);
        }
 

        ///  
        /// Implementation of Freezable.GetAsFrozenCore. 
        /// 
        ///  
        protected override void GetAsFrozenCore(Freezable sourceFreezable)
        {
            BitmapEffectGeneralTransform transform = (BitmapEffectGeneralTransform)sourceFreezable;
            base.GetAsFrozenCore(sourceFreezable); 
            CopyCommon(transform);
        } 
 

        ///  
        /// Implementation of Freezable.GetCurrentValueAsFrozenCore.
        /// 
        /// 
        protected override void GetCurrentValueAsFrozenCore(Freezable sourceFreezable) 
        {
            BitmapEffectGeneralTransform transform = (BitmapEffectGeneralTransform)sourceFreezable; 
            base.GetCurrentValueAsFrozenCore(sourceFreezable); 
            CopyCommon(transform);
        } 

        /// 
        /// Transforms a point
        ///  
        /// input point
        /// output point 
        /// false if the point cannot be transformed 
        public override bool TryTransform(Point inPoint, out Point result)
        { 
            if (BitmapEffect == null)
                throw new InvalidOperationException(SR.Get(SRID.Transform_No_Effect, null));

            if (BitmapEffectInput == null) 
                throw new InvalidOperationException(SR.Get(SRID.Transform_No_Effect_Input, null));
 
            BitmapEffect.VisualBounds = _visualBounds; 
            return BitmapEffect.TransformPoint(BitmapEffectInput, inPoint, out result, _fInverse);
        } 

        /// 
        /// Transform the rect bounds into the smallest axis alligned bounding box that
        /// contains all the point in the original bounds. 
        /// 
        ///  
        ///  
        public override Rect TransformBounds(Rect rect)
        { 
            if (BitmapEffect == null)
                throw new InvalidOperationException(SR.Get(SRID.Transform_No_Effect, null));

            if (BitmapEffectInput == null) 
                throw new InvalidOperationException(SR.Get(SRID.Transform_No_Effect_Input, null));
 
            return BitmapEffect.TransformRect(BitmapEffectInput, rect, _fInverse); 
        }
 
        /// 
        /// Returns the inverse transform if there is one, null otherwise
        /// 
        public override GeneralTransform Inverse 
        {
            get 
            { 
                ReadPreamble();
 
                if (!BitmapEffect.IsInverseTransform)
                    return null;

                BitmapEffectGeneralTransform inverse = Clone(); 
                inverse.IsInverse = !_fInverse;
 
                return inverse; 
            }
        } 

        /// 
        /// Returns a best effort affine transform
        ///  
        internal override Transform AffineTransform
        { 
            [FriendAccessAllowed] // Built into Core, also used by Framework. 
            get
            { 
                return null;
            }
        }
 

        ///  
        /// Clones values that do not have corresponding DPs 
        /// 
        ///  
        private void CopyCommon(BitmapEffectGeneralTransform transform)
        {
            _fInverse = transform._fInverse;
            _visualBounds = transform._visualBounds; 
        }
    } 
} 

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

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