Code:
/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / Media / Imaging / InteropBitmapSource.cs / 2 / InteropBitmapSource.cs
//------------------------------------------------------------------------------ // Microsoft Avalon // Copyright (c) Microsoft Corporation. All Rights Reserved. // // File: InteropBitmap.cs // //----------------------------------------------------------------------------- using System; using System.IO; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Reflection; using MS.Internal; using MS.Win32.PresentationCore; using System.Security; using System.Security.Permissions; using System.Diagnostics; using System.Windows.Media; using System.Globalization; using System.Runtime.InteropServices; using System.Windows.Media.Animation; using System.Windows.Media.Composition; using MS.Internal.PresentationCore; // SecurityHelper using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; using System.Windows.Media.Imaging; namespace System.Windows.Interop { #region InteropBitmap ////// InteropBitmap provides caching functionality for a BitmapSource. /// public sealed class InteropBitmap : BitmapSource { ////// ////// Critical - Indirectly sets critical resources /// TreatAsSafe - No inputs, does not touch any critical data with external input. /// [SecurityCritical, SecurityTreatAsSafe] private InteropBitmap() : base(true) { SecurityHelper.DemandUnmanagedCode(); } ////// Construct a BitmapSource from an HBITMAP. /// /// /// /// /// /// ////// Critical - access unsafe code, accepts handle parameters /// [SecurityCritical] internal InteropBitmap(IntPtr hbitmap, IntPtr hpalette, Int32Rect sourceRect, BitmapSizeOptions sizeOptions, WICBitmapAlphaChannelOption alphaOptions) : base(true) // Use virtuals { InitializeFromHBitmap(hbitmap, hpalette, sourceRect, sizeOptions, alphaOptions); } ////// Critical - access unsafe code, accepts handle parameters /// [SecurityCritical] private void InitializeFromHBitmap(IntPtr hbitmap, IntPtr hpalette, Int32Rect sourceRect, BitmapSizeOptions sizeOptions, WICBitmapAlphaChannelOption alphaOptions) { _bitmapInit.BeginInit(); using (FactoryMaker myFactory = new FactoryMaker ()) { HRESULT.Check(UnsafeNativeMethods.WICImagingFactory.CreateBitmapFromHBITMAP( myFactory.ImagingFactoryPtr, hbitmap, hpalette, alphaOptions, out _unmanagedSource)); Debug.Assert (_unmanagedSource != null && !_unmanagedSource.IsInvalid); } _unmanagedSource.CalculateSize(); _sizeOptions = sizeOptions; _sourceRect = sourceRect; _syncObject = _unmanagedSource; _bitmapInit.EndInit(); FinalizeCreation(); } ////// Construct a BitmapSource from an HICON. /// /// /// /// ////// Critical - access unmanaged objects/resources, accepts unmanaged handle as argument /// TreatAsSafe - demands unmanaged code permission /// [SecurityCritical, SecurityTreatAsSafe] internal InteropBitmap(IntPtr hicon, Int32Rect sourceRect, BitmapSizeOptions sizeOptions) : base(true) // Use virtuals { SecurityHelper.DemandUnmanagedCode(); _bitmapInit.BeginInit(); using (FactoryMaker myFactory = new FactoryMaker()) { HRESULT.Check(UnsafeNativeMethods.WICImagingFactory.CreateBitmapFromHICON( myFactory.ImagingFactoryPtr, hicon, out _unmanagedSource)); Debug.Assert (_unmanagedSource != null && !_unmanagedSource.IsInvalid); } _unmanagedSource.CalculateSize(); _sourceRect = sourceRect; _sizeOptions = sizeOptions; _syncObject = _unmanagedSource; _bitmapInit.EndInit(); FinalizeCreation(); } ////// Construct a BitmapSource from a memory section. /// /// /// /// /// /// /// ////// Critical - access unmanaged objects/resources, accepts unmanaged handle as argument /// TreatAsSafe - demands unmanaged code permission /// [SecurityCritical, SecurityTreatAsSafe] internal InteropBitmap( IntPtr section, int pixelWidth, int pixelHeight, PixelFormat format, int stride, int offset) : base(true) // Use virtuals { SecurityHelper.DemandUnmanagedCode(); _bitmapInit.BeginInit(); if (pixelWidth <= 0) { throw new ArgumentOutOfRangeException("pixelWidth", SR.Get(SRID.ParameterMustBeGreaterThanZero)); } if (pixelHeight <= 0) { throw new ArgumentOutOfRangeException("pixelHeight", SR.Get(SRID.ParameterMustBeGreaterThanZero)); } Guid formatGuid = format.Guid; HRESULT.Check(UnsafeNativeMethods.WindowsCodecApi.CreateBitmapFromSection( (uint)pixelWidth, (uint)pixelHeight, ref formatGuid, section, (uint)stride, (uint)offset, out _unmanagedSource )); Debug.Assert (_unmanagedSource != null && !_unmanagedSource.IsInvalid); _unmanagedSource.CalculateSize(); _sourceRect = Int32Rect.Empty; _sizeOptions = null; _syncObject = _unmanagedSource; _bitmapInit.EndInit(); FinalizeCreation(); } ////// Implementation of ///Freezable.CreateInstanceCore . ///The new Freezable. ////// Critical - accesses critical code. /// TreatAsSafe - method only produces clone of original image. /// [SecurityCritical, SecurityTreatAsSafe] protected override Freezable CreateInstanceCore() { return new InteropBitmap(); } ////// Common Copy method used to implement CloneCore() and CloneCurrentValueCore(), /// GetAsFrozenCore(), and GetCurrentValueAsFrozenCore(). /// ////// Critical - calls unmanaged objects /// [SecurityCritical] private void CopyCommon(InteropBitmap sourceBitmapSource) { // Avoid Animatable requesting resource updates for invalidations that occur during construction Animatable_IsResourceInvalidationNecessary = false; _unmanagedSource = sourceBitmapSource._unmanagedSource; _sourceRect = sourceBitmapSource._sourceRect; _sizeOptions = sourceBitmapSource._sizeOptions; InitFromWICSource(sourceBitmapSource.WicSourceHandle); // The next invalidation will cause Animatable to register an UpdateResource callback Animatable_IsResourceInvalidationNecessary = true; } ////// Implementation of ///Freezable.CloneCore . ////// Critical - accesses critical code. /// TreatAsSafe - method only produces clone of original image. /// [SecurityCritical, SecurityTreatAsSafe] protected override void CloneCore(Freezable sourceFreezable) { InteropBitmap sourceBitmapSource = (InteropBitmap)sourceFreezable; base.CloneCore(sourceFreezable); CopyCommon(sourceBitmapSource); } ////// Implementation of ///Freezable.CloneCurrentValueCore . ////// Critical - accesses critical code. /// TreatAsSafe - method only produces clone of original image. /// [SecurityCritical, SecurityTreatAsSafe] protected override void CloneCurrentValueCore(Freezable sourceFreezable) { InteropBitmap sourceBitmapSource = (InteropBitmap)sourceFreezable; base.CloneCurrentValueCore(sourceFreezable); CopyCommon(sourceBitmapSource); } ////// Implementation of ///Freezable.GetAsFrozenCore . ////// Critical - accesses critical code. /// TreatAsSafe - method only produces GetAsFrozen of original image. /// [SecurityCritical, SecurityTreatAsSafe] protected override void GetAsFrozenCore(Freezable sourceFreezable) { InteropBitmap sourceBitmapSource = (InteropBitmap)sourceFreezable; base.GetAsFrozenCore(sourceFreezable); CopyCommon(sourceBitmapSource); } ////// Implementation of ///Freezable.GetCurrentValueAsFrozenCore . ////// Critical - accesses critical code. /// TreatAsSafe - method only produces GetCurrentValueAsFrozen of original image. /// [SecurityCritical, SecurityTreatAsSafe] protected override void GetCurrentValueAsFrozenCore(Freezable sourceFreezable) { InteropBitmap sourceBitmapSource = (InteropBitmap)sourceFreezable; base.GetCurrentValueAsFrozenCore(sourceFreezable); CopyCommon(sourceBitmapSource); } /// /// Create from WICBitmapSource /// ////// Critical - calls unmanaged objects /// [SecurityCritical] private void InitFromWICSource( SafeMILHandle wicSource ) { _bitmapInit.BeginInit(); BitmapSourceSafeMILHandle bitmapSource = null; lock (_syncObject) { using (FactoryMaker factoryMaker = new FactoryMaker()) { HRESULT.Check(UnsafeNativeMethods.WICImagingFactory.CreateBitmapFromSource( factoryMaker.ImagingFactoryPtr, wicSource, WICBitmapCreateCacheOptions.WICBitmapCacheOnLoad, out bitmapSource)); } bitmapSource.CalculateSize(); } WicSourceHandle = bitmapSource; _isSourceCached = true; _bitmapInit.EndInit(); UpdateCachedSettings(); } ////// Invalidates the bitmap source. /// ////// Critical - calls critical code, access unmanaged resources /// PublicOK - demands unmanaged code permission /// [SecurityCritical] public void Invalidate() { SecurityHelper.DemandUnmanagedCode(); WritePreamble(); if (_unmanagedSource != null) { HRESULT.Check(UnsafeNativeMethods.WICBitmap.SetResolution(_unmanagedSource, 96, 96)); RegisterForAsyncUpdateResource(); } WritePostscript(); } // ISupportInitialize /// /// Create the unmanaged resources /// ////// Critical - access unmanaged objects/resources /// [SecurityCritical] internal override void FinalizeCreation() { BitmapSourceSafeMILHandle wicClipper = null; BitmapSourceSafeMILHandle wicTransformer = null; BitmapSourceSafeMILHandle transformedSource = _unmanagedSource; HRESULT.Check(UnsafeNativeMethods.WICBitmap.SetResolution(_unmanagedSource, 96, 96)); using (FactoryMaker factoryMaker = new FactoryMaker()) { IntPtr wicFactory = factoryMaker.ImagingFactoryPtr; if (!_sourceRect.IsEmpty) { HRESULT.Check(UnsafeNativeMethods.WICImagingFactory.CreateBitmapClipper( wicFactory, out wicClipper)); lock (_syncObject) { HRESULT.Check(UnsafeNativeMethods.WICBitmapClipper.Initialize( wicClipper, transformedSource, ref _sourceRect)); } transformedSource = wicClipper; } if (_sizeOptions != null) { if (_sizeOptions.DoesScale) { Debug.Assert(_sizeOptions.Rotation == Rotation.Rotate0); uint width, height; _sizeOptions.GetScaledWidthAndHeight( (uint)_sizeOptions.PixelWidth, (uint)_sizeOptions.PixelHeight, out width, out height); HRESULT.Check(UnsafeNativeMethods.WICImagingFactory.CreateBitmapScaler( wicFactory, out wicTransformer)); lock (_syncObject) { HRESULT.Check(UnsafeNativeMethods.WICBitmapScaler.Initialize( wicTransformer, transformedSource, width, height, WICInterpolationMode.Fant)); } } else if (_sizeOptions.Rotation != Rotation.Rotate0) { HRESULT.Check(UnsafeNativeMethods.WICImagingFactory.CreateBitmapFlipRotator( wicFactory, out wicTransformer)); lock (_syncObject) { HRESULT.Check(UnsafeNativeMethods.WICBitmapFlipRotator.Initialize( wicTransformer, transformedSource, _sizeOptions.WICTransformOptions)); } } if (wicTransformer != null) transformedSource = wicTransformer; } lock (_syncObject) { transformedSource.CalculateSize(); } WicSourceHandle = transformedSource; // Since the original source is an HICON, HBITMAP or section, we know it's cached. // FlipRotate and Clipper do not affect our cache performance. _isSourceCached = true; } CreationCompleted = true; UpdateCachedSettings(); } ////// Critical - unmanaged resource - not safe to hand out /// [SecurityCritical] private BitmapSourceSafeMILHandle /* IWICBitmapSource */ _unmanagedSource = null; private Int32Rect _sourceRect = Int32Rect.Empty; private BitmapSizeOptions _sizeOptions = null; } #endregion // InteropBitmap } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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