SplashScreenNativeMethods.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Base / MS / Internal / SplashScreenNativeMethods.cs / 1305600 / SplashScreenNativeMethods.cs
                        
                        
                             

using System;
using System.Runtime.ConstrainedExecution;
using System.Runtime.InteropServices; 
using System.Security;
using System.Windows; 
using Microsoft.Internal; 

namespace MS.Win32 
{
    internal sealed partial class UnsafeNativeMethods
    {
        [SecurityCritical(SecurityCriticalScope.Everything), SuppressUnmanagedCodeSecurity] 
        internal class WIC
        { 
            #region Constants 
            internal const int WINCODEC_SDK_VERSION = 0x0236;
            internal static readonly Guid WICPixelFormat32bppPBGRA = new Guid(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x10); 
            #endregion

            [DllImport(DllImport.WindowsCodecs, EntryPoint = "WICCreateImagingFactory_Proxy")]
            internal static extern int CreateImagingFactory( 
                UInt32 SDKVersion,
                out IntPtr ppICodecFactory); 
 
            [DllImport(DllImport.WindowsCodecs, EntryPoint = "IWICImagingFactory_CreateStream_Proxy")]
            internal static extern int /* HRESULT */ CreateStream( 
                IntPtr pICodecFactory,
                out IntPtr /* IWICBitmapStream */ ppIStream);

            [DllImport(DllImport.WindowsCodecs, EntryPoint = "IWICStream_InitializeFromMemory_Proxy")] 
            internal static extern int /*HRESULT*/ InitializeStreamFromMemory(
                IntPtr pIWICStream, 
                IntPtr pbBuffer, 
                uint cbSize);
 
            [DllImport(DllImport.WindowsCodecs, EntryPoint = "IWICImagingFactory_CreateDecoderFromStream_Proxy")]
            internal static extern int /*HRESULT*/ CreateDecoderFromStream(
                IntPtr pICodecFactory,
                IntPtr /* IStream */ pIStream, 
                ref Guid guidVendor,
                UInt32 metadataFlags, 
                out IntPtr /* IWICBitmapDecoder */ ppIDecode); 

            [DllImport(DllImport.WindowsCodecs, EntryPoint = "IWICBitmapDecoder_GetFrame_Proxy")] 
            internal static extern int /* HRESULT */ GetFrame(
                IntPtr /* IWICBitmapDecoder */ THIS_PTR,
                UInt32 index,
                out IntPtr /* IWICBitmapFrameDecode */ ppIFrameDecode); 

            [DllImport(DllImport.WindowsCodecs, EntryPoint = "IWICImagingFactory_CreateFormatConverter_Proxy")] 
            internal static extern int /* HRESULT */ CreateFormatConverter( 
                IntPtr pICodecFactory,
                out IntPtr /* IWICFormatConverter */ ppFormatConverter); 

            [DllImport(DllImport.WindowsCodecs, EntryPoint = "IWICFormatConverter_Initialize_Proxy")]
            internal static extern int /* HRESULT */ InitializeFormatConverter(
                IntPtr /* IWICFormatConverter */ THIS_PTR, 
                IntPtr /* IWICBitmapSource */ source,
                ref Guid dstFormat, 
                int dither, 
                IntPtr /* IWICBitmapPalette */ bitmapPalette,
                double alphaThreshold, 
                WICPaletteType paletteTranslate);

            [DllImport(DllImport.WindowsCodecs, EntryPoint = "IWICImagingFactory_CreateBitmapFlipRotator_Proxy")]
            internal static extern int /* HRESULT */ CreateBitmapFlipRotator( 
                IntPtr pICodecFactory,
                out IntPtr /* IWICBitmapFlipRotator */ ppBitmapFlipRotator); 
 
            [DllImport(DllImport.WindowsCodecs, EntryPoint = "IWICBitmapFlipRotator_Initialize_Proxy")]
            internal static extern int /* HRESULT */ InitializeBitmapFlipRotator( 
                IntPtr /* IWICBitmapFlipRotator */ THIS_PTR,
                IntPtr /* IWICBitmapSource */ source,
                WICBitmapTransformOptions options);
 
            [DllImport(DllImport.WindowsCodecs, EntryPoint = "IWICBitmapSource_GetSize_Proxy")]
            internal static extern int /* HRESULT */ GetBitmapSize( 
                IntPtr /* IWICBitmapSource */ THIS_PTR, 
                out Int32 puiWidth,
                out Int32 puiHeight); 

            [DllImport(DllImport.WindowsCodecs, EntryPoint = "IWICBitmapSource_CopyPixels_Proxy")]
            internal static extern int /* HRESULT */ CopyPixels(
                IntPtr /* IWICBitmapSource */ THIS_PTR, 
                ref Int32Rect prc,
                Int32 cbStride, 
                Int32 cbBufferSize, 
                IntPtr /* BYTE* */ pvPixels);
 

            #region enums

            internal enum WICBitmapTransformOptions 
            {
                WICBitmapTransformRotate0 = 0, 
                WICBitmapTransformRotate90 = 0x1, 
                WICBitmapTransformRotate180 = 0x2,
                WICBitmapTransformRotate270 = 0x3, 
                WICBitmapTransformFlipHorizontal = 0x8,
                WICBitmapTransformFlipVertical = 0x10
            }
 
            internal enum WICPaletteType
            { 
                WICPaletteTypeCustom = 0, 
                WICPaletteTypeOptimal = 1,
                WICPaletteTypeFixedBW = 2, 
                WICPaletteTypeFixedHalftone8 = 3,
                WICPaletteTypeFixedHalftone27 = 4,
                WICPaletteTypeFixedHalftone64 = 5,
                WICPaletteTypeFixedHalftone125 = 6, 
                WICPaletteTypeFixedHalftone216 = 7,
                WICPaletteTypeFixedWebPalette = 7, 
                WICPaletteTypeFixedHalftone252 = 8, 
                WICPaletteTypeFixedHalftone256 = 9,
                WICPaletteTypeFixedGray4 = 10, 
                WICPaletteTypeFixedGray16 = 11,
                WICPaletteTypeFixedGray256 = 12
            };
 
            #endregion
        } 
 
        internal class HRESULT
        { 
            /// 
            /// Critical: This calls into Marshal.ThrowExceptionForHR which has a link demand
            /// Safe:  Throwing an exception is deemed as a safe operation (throwing exceptions is allowed in Partial Trust).
            ///        We ensure the call to ThrowExceptionForHR is safe since we pass an IntPtr that has a value of -1 so that 
            ///        ThrowExceptionForHR ignores IErrorInfo of the current thread, which could reveal critical information otherwise.
            ///  
            [SecuritySafeCritical] 
            public static void Check(int hr)
            { 
                if (hr >= 0)
                {
                    return;
                } 
                else
                { 
                    // PresentationCore (wgx_render.cs) has a more complete system 
                    // for converting hresults to exceptions for MIL and windows codecs
                    // but for splash screen we don't want to take a dependency on core. 
                    Marshal.ThrowExceptionForHR(hr, (IntPtr)(-1));
                }
            }
        } 
    }
} 

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

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