Imaging.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / InterOp / Imaging.cs / 2 / Imaging.cs
                        
                        
                            //------------------------------------------------------------------------------ 
//  Microsoft Avalon
//  Copyright (c) Microsoft Corporation, All Rights Reserved.
//
//  File: Imaging.cs 
//
//----------------------------------------------------------------------------- 
using System; 
using System.Security;
using System.Security.Permissions; 
using MS.Internal;
using System.Diagnostics;
using System.Windows;
using System.Windows.Media.Imaging; 
using Microsoft.Win32.SafeHandles;
using MS.Internal.PresentationCore;                        // SecurityHelper 
using System.Windows.Interop; 

namespace System.Windows.Interop 
{
    /// 
    /// Managed/Unmanaged Interop for Imaging.
    ///  
    public static class Imaging
    { 
        ///  
        /// Construct an Bitmap from a HBITMAP.
        ///  
        /// 
        /// 
        /// 
        ///  
        /// 
        ///     Callers must have UnmanagedCode permission to call this API. 
        ///  
        /// 
        /// Critical - calls critical code, access unmanaged resources 
        /// PublicOK - demands unmanaged code permission
        /// 
        [SecurityCritical]
        unsafe public static BitmapSource CreateBitmapSourceFromHBitmap( 
            IntPtr bitmap,
            IntPtr palette, 
            Int32Rect sourceRect, 
            BitmapSizeOptions sizeOptions)
        { 
            SecurityHelper.DemandUnmanagedCode();

            // CR: [....] (1681459)
            return CriticalCreateBitmapSourceFromHBitmap(bitmap, palette, sourceRect, sizeOptions, WICBitmapAlphaChannelOption.WICBitmapUseAlpha); 
        }
 
        ///  
        /// Construct an Bitmap from a HBITMAP.
        ///  
        /// 
        /// 
        /// 
        ///  
        /// 
        ///  
        /// Critical - calls critical code, access unmanaged resources 
        /// 
        [SecurityCritical] 
        unsafe internal static BitmapSource CriticalCreateBitmapSourceFromHBitmap(
            IntPtr bitmap,
            IntPtr palette,
            Int32Rect sourceRect, 
            BitmapSizeOptions sizeOptions,
            WICBitmapAlphaChannelOption alphaOptions) 
        { 
            if (bitmap == IntPtr.Zero)
            { 
                throw new ArgumentNullException("bitmap");
            }

            return new InteropBitmap(bitmap, palette, sourceRect, sizeOptions, alphaOptions); // use the critical version 
        }
 
        ///  
        /// Construct an Bitmap from a HICON.
        ///  
        /// 
        /// 
        /// 
        ///  
        ///     Callers must have UnmanagedCode permission to call this API.
        ///  
        ///  
        /// Critical - calls critical code, access unmanaged resources
        /// PublicOK - demands unmanaged code permission 
        /// 
        [SecurityCritical ]
        unsafe public static BitmapSource CreateBitmapSourceFromHIcon(
            IntPtr icon, 
            Int32Rect sourceRect,
            BitmapSizeOptions sizeOptions) 
        { 
            SecurityHelper.DemandUnmanagedCode();
 
            if (icon == IntPtr.Zero)
            {
                throw new ArgumentNullException("icon");
            } 

            return new InteropBitmap(icon, sourceRect, sizeOptions); 
        } 

        ///  
        /// Construct an Bitmap from a section handle.
        /// 
        /// 
        ///  
        /// 
        ///  
        ///  
        /// 
        ///  
        ///     Callers must have UnmanagedCode permission to call this API.
        /// 
        /// 
        /// Critical - calls critical code, access unmanaged resources 
        /// PublicOK - demands unmanaged code permission
        ///  
        [SecurityCritical ] 
        unsafe public static BitmapSource CreateBitmapSourceFromMemorySection(
            IntPtr section, 
            int pixelWidth,
            int pixelHeight,
            Media.PixelFormat format,
            int stride, 
            int offset)
        { 
            SecurityHelper.DemandUnmanagedCode(); 

            if (section == IntPtr.Zero) 
            {
                throw new ArgumentNullException("section");
            }
 
            return new InteropBitmap(section, pixelWidth, pixelHeight, format, stride, offset);
        } 
 
    }
} 


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