//------------------------------------------------------------------------------
//  Microsoft Avalon
//  Copyright (c) Microsoft Corporation, All Rights Reserved
//
//  File: UnknownBitmapEncoder.cs
//
//------------------------------------------------------------------------------
 
using System;
using System.Collections;
using System.Security;
using System.Security.Permissions;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Reflection;
using MS.Internal;
using MS.Win32.PresentationCore;
using System.Diagnostics;
using System.Windows.Media;
using System.Globalization;
using System.Windows.Media.Imaging;
 
namespace System.Windows.Media.Imaging
{
    #region UnknownBitmapEncoder
 
    /// <summary>
    /// Built-in Encoder for Unknown files.
    /// </summary>
    internal sealed class UnknownBitmapEncoder : BitmapEncoder
    {
        #region Constructors
 
        /// <summary>
        /// Constructor for UnknownBitmapEncoder
        /// </summary>
        /// <SecurityNote>
        /// Critical - will eventually create unmanaged resources based on guid
        /// </SecurityNote>
        [SecurityCritical]
        public UnknownBitmapEncoder(Guid containerFormat) :
            base(true)
        {
            _containerFormat = containerFormat;
 
            // Assume it supports everything
            _supportsPreview = true;
            _supportsGlobalThumbnail = true;
            _supportsGlobalMetadata = false;
            _supportsFrameThumbnails = true;
            _supportsMultipleFrames = true;
            _supportsFrameMetadata = true;
        }
 
        #endregion
 
        #region Internal Properties / Methods
 
        /// <summary>
        /// Returns the container format for this encoder
        /// </summary>
        /// <SecurityNote>
        /// Critical - uses guid to create unmanaged resources
        /// </SecurityNote>
        internal override Guid ContainerFormat
        {
            [SecurityCritical]
            get
            {
                return _containerFormat;
            }
        }
 
        /// <summary>
        /// Setups the encoder and other properties before encoding each frame
        /// </summary>
        /// <SecurityNote>
        /// Critical - Accesses unmanaged code
        /// TreatAsSafe - All parameters passed in are safe (null, 0 and safehandle)
        /// </SecurityNote>
        [SecurityCritical, SecurityTreatAsSafe]
        internal override void SetupFrame(SafeMILHandle frameEncodeHandle, SafeMILHandle encoderOptions)
        {
            HRESULT.Check(UnsafeNativeMethods.WICBitmapFrameEncode.Initialize(
                frameEncodeHandle,
                encoderOptions
                ));
        }
 
        #endregion
 
        #region Internal Abstract
 
        /// Need to implement this to derive from the "sealed" object
        internal override void SealObject()
        {
            throw new NotImplementedException();
        }
 
        #endregion
 
        #region Data Members
 
        /// <SecurityNote>
        /// Critical - CLSID used for creation of critical resources
        /// </SecurityNote>
        [SecurityCritical]
        private Guid _containerFormat;
 
        #endregion
    }
 
    #endregion // UnknownBitmapEncoder
}