Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / Media / RadialGradientBrush.cs / 1305600 / RadialGradientBrush.cs
//---------------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // Description: This file contains the implementation of RadialGradientBrush. // The RadialGradientBrush is a GradientBrush which defines its // Gradient as a radial interpolation within an Ellipse. // // History: // 05/08/2003 : [....] - Created it. // 09/21/2004 : timothyc - Added GradientStopCollection constructor. // //--------------------------------------------------------------------------- using MS.Internal; using MS.Internal.PresentationCore; using System; using System.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Diagnostics; using System.Reflection; using System.Runtime.InteropServices; using System.Windows; using System.Windows.Media.Animation; using System.Windows.Media.Composition; using System.Security; using System.Security.Permissions; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace System.Windows.Media { ////// RadialGradientBrush - This GradientBrush defines its Gradient as an interpolation /// within an Ellipse. /// public sealed partial class RadialGradientBrush : GradientBrush { #region Constructors ////// Default constructor for RadialGradientBrush. The resulting brush has no content. /// public RadialGradientBrush() : base() { } ////// RadialGradientBrush Constructor /// Constructs a RadialGradientBrush with two colors specified for GradientStops at /// offsets 0.0 and 1.0. /// /// The Color at offset 0.0. /// The Color at offset 1.0. public RadialGradientBrush(Color startColor, Color endColor) : base() { GradientStops.Add(new GradientStop(startColor, 0.0)); GradientStops.Add(new GradientStop(endColor, 1.0)); } ////// RadialGradientBrush Constructor /// Constructs a RadialGradientBrush with GradientStops set to the passed-in /// collection. /// /// GradientStopCollection to set on this brush. public RadialGradientBrush(GradientStopCollection gradientStopCollection) : base(gradientStopCollection) { } #endregion Constructors ////// Critical: This code acceses an unsafe code block /// TreatAsSafe: This does not expose any data uses all local variables. /// Sending instructions to the channel is considered a safe operation.Also /// all calls to copybytes have been verified so the operation is safe /// [SecurityCritical,SecurityTreatAsSafe] private void ManualUpdateResource(DUCE.Channel channel, bool skipOnChannelCheck) { // If we're told we can skip the channel check, then we must be on channel Debug.Assert(!skipOnChannelCheck || _duceResource.IsOnChannel(channel)); if (skipOnChannelCheck || _duceResource.IsOnChannel(channel)) { Transform vTransform = Transform; Transform vRelativeTransform = RelativeTransform; GradientStopCollection vGradientStops = GradientStops; DUCE.ResourceHandle hTransform; if (vTransform == null || Object.ReferenceEquals(vTransform, Transform.Identity) ) { hTransform = DUCE.ResourceHandle.Null; } else { hTransform = ((DUCE.IResource)vTransform).GetHandle(channel); } DUCE.ResourceHandle hRelativeTransform; if (vRelativeTransform == null || Object.ReferenceEquals(vRelativeTransform, Transform.Identity) ) { hRelativeTransform = DUCE.ResourceHandle.Null; } else { hRelativeTransform = ((DUCE.IResource)vRelativeTransform).GetHandle(channel); } DUCE.ResourceHandle hOpacityAnimations = GetAnimationResourceHandle(OpacityProperty, channel); DUCE.ResourceHandle hCenterAnimations = GetAnimationResourceHandle(CenterProperty, channel); DUCE.ResourceHandle hRadiusXAnimations = GetAnimationResourceHandle(RadiusXProperty, channel); DUCE.ResourceHandle hRadiusYAnimations = GetAnimationResourceHandle(RadiusYProperty, channel); DUCE.ResourceHandle hGradientOriginAnimations = GetAnimationResourceHandle(GradientOriginProperty, channel); DUCE.MILCMD_RADIALGRADIENTBRUSH data; unsafe { data.Type = MILCMD.MilCmdRadialGradientBrush; data.Handle = _duceResource.GetHandle(channel); double tempOpacity = Opacity; DUCE.CopyBytes((byte*)&data.Opacity, (byte*)&tempOpacity, 8); data.hOpacityAnimations = hOpacityAnimations; data.hTransform = hTransform; data.hRelativeTransform = hRelativeTransform; data.ColorInterpolationMode = ColorInterpolationMode; data.MappingMode = MappingMode; data.SpreadMethod = SpreadMethod; Point tempCenter = Center; DUCE.CopyBytes((byte*)&data.Center, (byte*)&tempCenter, 16); data.hCenterAnimations = hCenterAnimations; double tempRadiusX = RadiusX; DUCE.CopyBytes((byte*)&data.RadiusX, (byte*)&tempRadiusX, 8); data.hRadiusXAnimations = hRadiusXAnimations; double tempRadiusY = RadiusY; DUCE.CopyBytes((byte*)&data.RadiusY, (byte*)&tempRadiusY, 8); data.hRadiusYAnimations = hRadiusYAnimations; Point tempGradientOrigin = GradientOrigin; DUCE.CopyBytes((byte*)&data.GradientOrigin, (byte*)&tempGradientOrigin, 16); data.hGradientOriginAnimations = hGradientOriginAnimations; // NTRAID#Longhorn-1011154-2004/8/12-asecchia GradientStopCollection: Need to enforce upper-limit of gradient stop capacity int count = (vGradientStops == null) ? 0 : vGradientStops.Count; data.GradientStopsSize = (UInt32)(sizeof(DUCE.MIL_GRADIENTSTOP)*count); channel.BeginCommand( (byte*)&data, sizeof(DUCE.MILCMD_RADIALGRADIENTBRUSH), sizeof(DUCE.MIL_GRADIENTSTOP)*count ); for (int i=0; i
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