Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / CommonUI / System / Drawing / Region.cs / 1305376 / Region.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
namespace System.Drawing {
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System;
using Microsoft.Win32;
using System.ComponentModel;
using System.Drawing.Drawing2D;
using System.Drawing;
using System.Drawing.Internal;
using System.Globalization;
using System.Runtime.Versioning;
/**
* Represent a Region object
*/
///
///
/// Describes the interior of a graphics shape
/// composed of rectangles and paths.
///
///
public sealed class Region : MarshalByRefObject, IDisposable {
#if FINALIZATION_WATCH
private string allocationSite = Graphics.GetAllocationStack();
#endif
/**
* Construct a new region object
*/
///
///
/// Initializes a new instance of the
///
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public Region() {
IntPtr region = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipCreateRegion(out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
SetNativeRegion(region);
}
///
///
/// Initializes a new instance of the
///
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public Region(RectangleF rect) {
IntPtr region = IntPtr.Zero;
GPRECTF gprectf = rect.ToGPRECTF();
int status = SafeNativeMethods.Gdip.GdipCreateRegionRect(ref gprectf, out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
SetNativeRegion(region);
}
///
///
/// Initializes a new instance of the
///
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public Region(Rectangle rect) {
IntPtr region = IntPtr.Zero;
GPRECT gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipCreateRegionRectI(ref gprect, out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
SetNativeRegion(region);
}
///
///
/// Initializes a new instance of the
///
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public Region(GraphicsPath path) {
if (path == null)
throw new ArgumentNullException("path");
IntPtr region = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipCreateRegionPath(new HandleRef(path, path.nativePath), out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
SetNativeRegion(region);
}
///
/// Initializes a new instance of the
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public Region(RegionData rgnData) {
if (rgnData == null)
throw new ArgumentNullException("rgnData");
IntPtr region = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipCreateRegionRgnData(rgnData.Data,
rgnData.Data.Length,
out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
SetNativeRegion(region);
}
internal Region(IntPtr nativeRegion) {
SetNativeRegion(nativeRegion);
}
///
/// Initializes a new instance of the
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public static Region FromHrgn(IntPtr hrgn) {
IntSecurity.ObjectFromWin32Handle.Demand();
IntPtr region = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipCreateRegionHrgn(new HandleRef(null, hrgn), out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return new Region(region);
}
[System.Runtime.TargetedPatchingOptOutAttribute("Performance critical to inline across NGen image boundaries")]
private void SetNativeRegion(IntPtr nativeRegion) {
if (nativeRegion == IntPtr.Zero)
throw new ArgumentNullException("nativeRegion");
this.nativeRegion = nativeRegion;
}
/**
* Make a copy of the region object
*/
///
/// Creates an exact copy if this
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public Region Clone() {
IntPtr region = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipCloneRegion(new HandleRef(this, nativeRegion), out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return new Region(region);
}
/**
* Dispose of resources associated with the
*/
///
///
/// Cleans up Windows resources for this
///
///
public void Dispose() {
Dispose(true);
GC.SuppressFinalize(this);
}
void Dispose(bool disposing) {
#if FINALIZATION_WATCH
if (!disposing && nativeRegion != IntPtr.Zero)
Debug.WriteLine("**********************\nDisposed through finalization:\n" + allocationSite);
#endif
if (nativeRegion != IntPtr.Zero) {
try{
#if DEBUG
int status =
#endif
SafeNativeMethods.Gdip.GdipDeleteRegion(new HandleRef(this, nativeRegion));
#if DEBUG
Debug.Assert(status == SafeNativeMethods.Gdip.Ok, "GDI+ returned an error status: " + status.ToString(CultureInfo.InvariantCulture));
#endif
}
catch( Exception ex ){
if( ClientUtils.IsSecurityOrCriticalException( ex ) ) {
throw;
}
Debug.Fail( "Exception thrown during Dispose: " + ex.ToString() );
}
finally{
nativeRegion = IntPtr.Zero;
}
}
}
///
/// Cleans up Windows resources for this
///
~Region() {
Dispose(false);
}
/*
* Region operations
*/
///
/// Initializes this
public void MakeInfinite() {
int status = SafeNativeMethods.Gdip.GdipSetInfinite(new HandleRef(this, nativeRegion));
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Initializes this
public void MakeEmpty() {
int status = SafeNativeMethods.Gdip.GdipSetEmpty(new HandleRef(this, nativeRegion));
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// float version
///
/// Updates this
public void Intersect(RectangleF rect) {
GPRECTF gprectf = rect.ToGPRECTF();
int status = SafeNativeMethods.Gdip.GdipCombineRegionRect(new HandleRef(this, nativeRegion), ref gprectf, CombineMode.Intersect);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// int version
///
///
/// Updates this
///
public void Intersect(Rectangle rect) {
GPRECT gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRectI(new HandleRef(this, nativeRegion), ref gprect, CombineMode.Intersect);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
///
/// Updates this
///
public void Intersect(GraphicsPath path) {
if (path == null)
throw new ArgumentNullException("path");
int status = SafeNativeMethods.Gdip.GdipCombineRegionPath(new HandleRef(this, nativeRegion), new HandleRef(path, path.nativePath), CombineMode.Intersect);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
///
/// Updates this
///
public void Intersect(Region region) {
if (region == null)
throw new ArgumentNullException("region");
int status = SafeNativeMethods.Gdip.GdipCombineRegionRegion(new HandleRef(this, nativeRegion), new HandleRef(region, region.nativeRegion), CombineMode.Intersect);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Releases the handle to the region handle.
///
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly")]
public void ReleaseHrgn(IntPtr regionHandle) {
IntSecurity.ObjectFromWin32Handle.Demand();
if (regionHandle == IntPtr.Zero) {
throw new ArgumentNullException("regionHandle");
}
SafeNativeMethods.IntDeleteObject(new HandleRef(this, regionHandle));
}
// float version
///
///
/// Updates this
///
public void Union(RectangleF rect) {
GPRECTF gprectf = new GPRECTF(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRect(new HandleRef(this, nativeRegion), ref gprectf, CombineMode.Union);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// int version
///
/// Updates this
public void Union(Rectangle rect) {
GPRECT gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRectI(new HandleRef(this, nativeRegion), ref gprect, CombineMode.Union);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Updates this
public void Union(GraphicsPath path) {
if (path == null)
throw new ArgumentNullException("path");
int status = SafeNativeMethods.Gdip.GdipCombineRegionPath(new HandleRef(this, nativeRegion), new HandleRef(path, path.nativePath), CombineMode.Union);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
///
/// Updates this
///
public void Union(Region region) {
if (region == null)
throw new ArgumentNullException("region");
int status = SafeNativeMethods.Gdip.GdipCombineRegionRegion(new HandleRef(this, nativeRegion), new HandleRef(region, region.nativeRegion), CombineMode.Union);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// float version
///
/// Updates this
public void Xor(RectangleF rect) {
GPRECTF gprectf = new GPRECTF(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRect(new HandleRef(this, nativeRegion), ref gprectf, CombineMode.Xor);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// int version
///
/// Updates this
public void Xor(Rectangle rect) {
GPRECT gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRectI(new HandleRef(this, nativeRegion), ref gprect, CombineMode.Xor);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Updates this
public void Xor(GraphicsPath path) {
if (path == null)
throw new ArgumentNullException("path");
int status = SafeNativeMethods.Gdip.GdipCombineRegionPath(new HandleRef(this, nativeRegion), new HandleRef(path, path.nativePath), CombineMode.Xor);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Updates this
public void Xor(Region region) {
if (region == null)
throw new ArgumentNullException("region");
int status = SafeNativeMethods.Gdip.GdipCombineRegionRegion(new HandleRef(this, nativeRegion), new HandleRef(region, region.nativeRegion), CombineMode.Xor);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// float version
///
/// Updates this
public void Exclude(RectangleF rect) {
GPRECTF gprectf = new GPRECTF(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRect(new HandleRef(this, nativeRegion), ref gprectf, CombineMode.Exclude);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// int version
///
/// Updates this
public void Exclude(Rectangle rect) {
GPRECT gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRectI(new HandleRef(this, nativeRegion), ref gprect, CombineMode.Exclude);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Updates this
public void Exclude(GraphicsPath path) {
if (path == null)
throw new ArgumentNullException("path");
int status = SafeNativeMethods.Gdip.GdipCombineRegionPath(new HandleRef(this, nativeRegion), new HandleRef(path, path.nativePath),
CombineMode.Exclude);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Updates this
public void Exclude(Region region) {
if (region == null)
throw new ArgumentNullException("region");
int status = SafeNativeMethods.Gdip.GdipCombineRegionRegion(new HandleRef(this, nativeRegion), new HandleRef(region, region.nativeRegion),
CombineMode.Exclude);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// float version
///
/// Updates this
public void Complement(RectangleF rect) {
GPRECTF gprectf = rect.ToGPRECTF();
int status = SafeNativeMethods.Gdip.GdipCombineRegionRect(new HandleRef(this, nativeRegion), ref gprectf, CombineMode.Complement);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// int version
///
/// Updates this
public void Complement(Rectangle rect) {
GPRECT gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRectI(new HandleRef(this, nativeRegion), ref gprect, CombineMode.Complement);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Updates this
public void Complement(GraphicsPath path) {
if (path == null)
throw new ArgumentNullException("path");
int status = SafeNativeMethods.Gdip.GdipCombineRegionPath(new HandleRef(this, nativeRegion), new HandleRef(path, path.nativePath), CombineMode.Complement);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
///
/// Updates this
///
public void Complement(Region region) {
if (region == null)
throw new ArgumentNullException("region");
int status = SafeNativeMethods.Gdip.GdipCombineRegionRegion(new HandleRef(this, nativeRegion), new HandleRef(region, region.nativeRegion), CombineMode.Complement);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
/**
* Transform operations
*/
///
/// Offsets the coordinates of this
public void Translate(float dx, float dy) {
int status = SafeNativeMethods.Gdip.GdipTranslateRegion(new HandleRef(this, nativeRegion), dx, dy);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Offsets the coordinates of this
public void Translate(int dx, int dy) {
int status = SafeNativeMethods.Gdip.GdipTranslateRegionI(new HandleRef(this, nativeRegion), dx, dy);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Transforms this
public void Transform(Matrix matrix) {
if (matrix == null)
throw new ArgumentNullException("matrix");
int status = SafeNativeMethods.Gdip.GdipTransformRegion(new HandleRef(this, nativeRegion),
new HandleRef(matrix, matrix.nativeMatrix));
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
/**
* Get region attributes
*/
///
/// Returns a
public RectangleF GetBounds(Graphics g) {
if (g == null)
throw new ArgumentNullException("g");
GPRECTF gprectf = new GPRECTF();
int status = SafeNativeMethods.Gdip.GdipGetRegionBounds(new HandleRef(this, nativeRegion), new HandleRef(g, g.NativeGraphics), ref gprectf);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return gprectf.ToRectangleF();
}
///
/// Returns a Windows handle to this
public IntPtr GetHrgn(Graphics g) {
if (g == null)
throw new ArgumentNullException("g");
IntPtr hrgn = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipGetRegionHRgn(new HandleRef(this, nativeRegion), new HandleRef(g, g.NativeGraphics), out hrgn);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return hrgn;
}
///
///
/// Tests whether this
///
public bool IsEmpty(Graphics g) {
if (g == null)
throw new ArgumentNullException("g");
int isEmpty;
int status = SafeNativeMethods.Gdip.GdipIsEmptyRegion(new HandleRef(this, nativeRegion), new HandleRef(g, g.NativeGraphics), out isEmpty);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isEmpty != 0;
}
///
///
/// Tests whether this
///
public bool IsInfinite(Graphics g) {
if (g == null)
throw new ArgumentNullException("g");
int isInfinite;
int status = SafeNativeMethods.Gdip.GdipIsInfiniteRegion(new HandleRef(this, nativeRegion), new HandleRef(g, g.NativeGraphics), out isInfinite);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isInfinite != 0;
}
///
///
/// Tests whether the specified
///
public bool Equals(Region region, Graphics g) {
if (g == null)
throw new ArgumentNullException("g");
if (region == null)
throw new ArgumentNullException("region");
int isEqual;
int status = SafeNativeMethods.Gdip.GdipIsEqualRegion(new HandleRef(this, nativeRegion), new HandleRef(region, region.nativeRegion), new HandleRef(g, g.NativeGraphics), out isEqual);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isEqual != 0;
}
///
/// Returns a
public RegionData GetRegionData() {
int regionSize = 0;
int status = SafeNativeMethods.Gdip.GdipGetRegionDataSize(new HandleRef(this, nativeRegion), out regionSize);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
if (regionSize == 0)
return null;
byte[] regionData = new byte[regionSize];
status = SafeNativeMethods.Gdip.GdipGetRegionData(new HandleRef(this, nativeRegion), regionData, regionSize, out regionSize);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return new RegionData(regionData);
}
/*
* Hit testing operations
*/
// float version
///
///
/// Tests whether the specified point is
/// contained within this
///
public bool IsVisible(float x, float y) {
return IsVisible(new PointF(x, y), null);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(PointF point) {
return IsVisible(point, null);
}
///
///
/// Tests whether the specified point is contained within this
///
public bool IsVisible(float x, float y, Graphics g) {
return IsVisible(new PointF(x, y), g);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(PointF point, Graphics g) {
int isVisible;
int status = SafeNativeMethods.Gdip.GdipIsVisibleRegionPoint(new HandleRef(this, nativeRegion), point.X, point.Y,
new HandleRef(g, (g==null) ? IntPtr.Zero : g.NativeGraphics),
out isVisible);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isVisible != 0;
}
///
///
/// Tests whether the specified rectangle is contained within this
///
public bool IsVisible(float x, float y, float width, float height) {
return IsVisible(new RectangleF(x, y, width, height), null);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(RectangleF rect) {
return IsVisible(rect, null);
}
///
///
/// Tests whether the specified rectangle is contained within this
///
public bool IsVisible(float x, float y, float width, float height, Graphics g) {
return IsVisible(new RectangleF(x, y, width, height), g);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(RectangleF rect, Graphics g) {
int isVisible = 0;
int status = SafeNativeMethods.Gdip.GdipIsVisibleRegionRect(new HandleRef(this, nativeRegion), rect.X, rect.Y,
rect.Width, rect.Height,
new HandleRef(g, (g==null) ? IntPtr.Zero : g.NativeGraphics),
out isVisible);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isVisible != 0;
}
// int version
///
///
/// Tests whether the specified point is contained within this
///
public bool IsVisible(int x, int y, Graphics g) {
return IsVisible(new Point(x, y), g);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(Point point) {
return IsVisible(point, null);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(Point point, Graphics g) {
int isVisible = 0;
int status = SafeNativeMethods.Gdip.GdipIsVisibleRegionPointI(new HandleRef(this, nativeRegion), point.X, point.Y,
new HandleRef(g, (g == null) ? IntPtr.Zero : g.NativeGraphics),
out isVisible);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isVisible != 0;
}
///
///
/// Tests whether the specified rectangle is contained within this
///
public bool IsVisible(int x, int y, int width, int height) {
return IsVisible(new Rectangle(x, y, width, height), null);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(Rectangle rect) {
return IsVisible(rect, null);
}
///
///
/// Tests whether the specified rectangle is contained within this
///
public bool IsVisible(int x, int y, int width, int height, Graphics g) {
return IsVisible(new Rectangle(x, y, width, height), g);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(Rectangle rect, Graphics g) {
int isVisible = 0;
int status = SafeNativeMethods.Gdip.GdipIsVisibleRegionRectI(new HandleRef(this, nativeRegion), rect.X, rect.Y,
rect.Width, rect.Height,
new HandleRef(g, (g == null) ? IntPtr.Zero : g.NativeGraphics),
out isVisible);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isVisible != 0;
}
///
///
/// Returns an array of
///
[SuppressMessage("Microsoft.Performance", "CA1808:AvoidCallsThatBoxValueTypes")]
public RectangleF[] GetRegionScans(Matrix matrix) {
if (matrix == null)
throw new ArgumentNullException("matrix");
int count = 0;
// call first time to get actual count of rectangles
int status = SafeNativeMethods.Gdip.GdipGetRegionScansCount(new HandleRef(this, nativeRegion),
out count,
new HandleRef(matrix, matrix.nativeMatrix));
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
RectangleF[] rectangles;
int rectsize = (int)Marshal.SizeOf(typeof(GPRECTF));
IntPtr memoryRects = Marshal.AllocHGlobal(rectsize*count);
try {
status = SafeNativeMethods.Gdip.GdipGetRegionScans(new HandleRef(this, nativeRegion),
memoryRects,
out count,
new HandleRef(matrix, matrix.nativeMatrix));
if (status != SafeNativeMethods.Gdip.Ok) {
throw SafeNativeMethods.Gdip.StatusException(status);
}
int index;
GPRECTF gprectf = new GPRECTF();
rectangles = new RectangleF[count];
for (index=0; index
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
namespace System.Drawing {
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System;
using Microsoft.Win32;
using System.ComponentModel;
using System.Drawing.Drawing2D;
using System.Drawing;
using System.Drawing.Internal;
using System.Globalization;
using System.Runtime.Versioning;
/**
* Represent a Region object
*/
///
///
/// Describes the interior of a graphics shape
/// composed of rectangles and paths.
///
///
public sealed class Region : MarshalByRefObject, IDisposable {
#if FINALIZATION_WATCH
private string allocationSite = Graphics.GetAllocationStack();
#endif
/**
* Construct a new region object
*/
///
///
/// Initializes a new instance of the
///
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public Region() {
IntPtr region = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipCreateRegion(out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
SetNativeRegion(region);
}
///
///
/// Initializes a new instance of the
///
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public Region(RectangleF rect) {
IntPtr region = IntPtr.Zero;
GPRECTF gprectf = rect.ToGPRECTF();
int status = SafeNativeMethods.Gdip.GdipCreateRegionRect(ref gprectf, out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
SetNativeRegion(region);
}
///
///
/// Initializes a new instance of the
///
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public Region(Rectangle rect) {
IntPtr region = IntPtr.Zero;
GPRECT gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipCreateRegionRectI(ref gprect, out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
SetNativeRegion(region);
}
///
///
/// Initializes a new instance of the
///
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public Region(GraphicsPath path) {
if (path == null)
throw new ArgumentNullException("path");
IntPtr region = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipCreateRegionPath(new HandleRef(path, path.nativePath), out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
SetNativeRegion(region);
}
///
/// Initializes a new instance of the
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public Region(RegionData rgnData) {
if (rgnData == null)
throw new ArgumentNullException("rgnData");
IntPtr region = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipCreateRegionRgnData(rgnData.Data,
rgnData.Data.Length,
out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
SetNativeRegion(region);
}
internal Region(IntPtr nativeRegion) {
SetNativeRegion(nativeRegion);
}
///
/// Initializes a new instance of the
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public static Region FromHrgn(IntPtr hrgn) {
IntSecurity.ObjectFromWin32Handle.Demand();
IntPtr region = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipCreateRegionHrgn(new HandleRef(null, hrgn), out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return new Region(region);
}
[System.Runtime.TargetedPatchingOptOutAttribute("Performance critical to inline across NGen image boundaries")]
private void SetNativeRegion(IntPtr nativeRegion) {
if (nativeRegion == IntPtr.Zero)
throw new ArgumentNullException("nativeRegion");
this.nativeRegion = nativeRegion;
}
/**
* Make a copy of the region object
*/
///
/// Creates an exact copy if this
[ResourceExposure(ResourceScope.Process)]
[ResourceConsumption(ResourceScope.Process)]
public Region Clone() {
IntPtr region = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipCloneRegion(new HandleRef(this, nativeRegion), out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return new Region(region);
}
/**
* Dispose of resources associated with the
*/
///
///
/// Cleans up Windows resources for this
///
///
public void Dispose() {
Dispose(true);
GC.SuppressFinalize(this);
}
void Dispose(bool disposing) {
#if FINALIZATION_WATCH
if (!disposing && nativeRegion != IntPtr.Zero)
Debug.WriteLine("**********************\nDisposed through finalization:\n" + allocationSite);
#endif
if (nativeRegion != IntPtr.Zero) {
try{
#if DEBUG
int status =
#endif
SafeNativeMethods.Gdip.GdipDeleteRegion(new HandleRef(this, nativeRegion));
#if DEBUG
Debug.Assert(status == SafeNativeMethods.Gdip.Ok, "GDI+ returned an error status: " + status.ToString(CultureInfo.InvariantCulture));
#endif
}
catch( Exception ex ){
if( ClientUtils.IsSecurityOrCriticalException( ex ) ) {
throw;
}
Debug.Fail( "Exception thrown during Dispose: " + ex.ToString() );
}
finally{
nativeRegion = IntPtr.Zero;
}
}
}
///
/// Cleans up Windows resources for this
///
~Region() {
Dispose(false);
}
/*
* Region operations
*/
///
/// Initializes this
public void MakeInfinite() {
int status = SafeNativeMethods.Gdip.GdipSetInfinite(new HandleRef(this, nativeRegion));
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Initializes this
public void MakeEmpty() {
int status = SafeNativeMethods.Gdip.GdipSetEmpty(new HandleRef(this, nativeRegion));
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// float version
///
/// Updates this
public void Intersect(RectangleF rect) {
GPRECTF gprectf = rect.ToGPRECTF();
int status = SafeNativeMethods.Gdip.GdipCombineRegionRect(new HandleRef(this, nativeRegion), ref gprectf, CombineMode.Intersect);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// int version
///
///
/// Updates this
///
public void Intersect(Rectangle rect) {
GPRECT gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRectI(new HandleRef(this, nativeRegion), ref gprect, CombineMode.Intersect);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
///
/// Updates this
///
public void Intersect(GraphicsPath path) {
if (path == null)
throw new ArgumentNullException("path");
int status = SafeNativeMethods.Gdip.GdipCombineRegionPath(new HandleRef(this, nativeRegion), new HandleRef(path, path.nativePath), CombineMode.Intersect);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
///
/// Updates this
///
public void Intersect(Region region) {
if (region == null)
throw new ArgumentNullException("region");
int status = SafeNativeMethods.Gdip.GdipCombineRegionRegion(new HandleRef(this, nativeRegion), new HandleRef(region, region.nativeRegion), CombineMode.Intersect);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Releases the handle to the region handle.
///
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly")]
public void ReleaseHrgn(IntPtr regionHandle) {
IntSecurity.ObjectFromWin32Handle.Demand();
if (regionHandle == IntPtr.Zero) {
throw new ArgumentNullException("regionHandle");
}
SafeNativeMethods.IntDeleteObject(new HandleRef(this, regionHandle));
}
// float version
///
///
/// Updates this
///
public void Union(RectangleF rect) {
GPRECTF gprectf = new GPRECTF(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRect(new HandleRef(this, nativeRegion), ref gprectf, CombineMode.Union);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// int version
///
/// Updates this
public void Union(Rectangle rect) {
GPRECT gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRectI(new HandleRef(this, nativeRegion), ref gprect, CombineMode.Union);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Updates this
public void Union(GraphicsPath path) {
if (path == null)
throw new ArgumentNullException("path");
int status = SafeNativeMethods.Gdip.GdipCombineRegionPath(new HandleRef(this, nativeRegion), new HandleRef(path, path.nativePath), CombineMode.Union);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
///
/// Updates this
///
public void Union(Region region) {
if (region == null)
throw new ArgumentNullException("region");
int status = SafeNativeMethods.Gdip.GdipCombineRegionRegion(new HandleRef(this, nativeRegion), new HandleRef(region, region.nativeRegion), CombineMode.Union);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// float version
///
/// Updates this
public void Xor(RectangleF rect) {
GPRECTF gprectf = new GPRECTF(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRect(new HandleRef(this, nativeRegion), ref gprectf, CombineMode.Xor);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// int version
///
/// Updates this
public void Xor(Rectangle rect) {
GPRECT gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRectI(new HandleRef(this, nativeRegion), ref gprect, CombineMode.Xor);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Updates this
public void Xor(GraphicsPath path) {
if (path == null)
throw new ArgumentNullException("path");
int status = SafeNativeMethods.Gdip.GdipCombineRegionPath(new HandleRef(this, nativeRegion), new HandleRef(path, path.nativePath), CombineMode.Xor);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Updates this
public void Xor(Region region) {
if (region == null)
throw new ArgumentNullException("region");
int status = SafeNativeMethods.Gdip.GdipCombineRegionRegion(new HandleRef(this, nativeRegion), new HandleRef(region, region.nativeRegion), CombineMode.Xor);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// float version
///
/// Updates this
public void Exclude(RectangleF rect) {
GPRECTF gprectf = new GPRECTF(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRect(new HandleRef(this, nativeRegion), ref gprectf, CombineMode.Exclude);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// int version
///
/// Updates this
public void Exclude(Rectangle rect) {
GPRECT gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRectI(new HandleRef(this, nativeRegion), ref gprect, CombineMode.Exclude);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Updates this
public void Exclude(GraphicsPath path) {
if (path == null)
throw new ArgumentNullException("path");
int status = SafeNativeMethods.Gdip.GdipCombineRegionPath(new HandleRef(this, nativeRegion), new HandleRef(path, path.nativePath),
CombineMode.Exclude);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Updates this
public void Exclude(Region region) {
if (region == null)
throw new ArgumentNullException("region");
int status = SafeNativeMethods.Gdip.GdipCombineRegionRegion(new HandleRef(this, nativeRegion), new HandleRef(region, region.nativeRegion),
CombineMode.Exclude);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// float version
///
/// Updates this
public void Complement(RectangleF rect) {
GPRECTF gprectf = rect.ToGPRECTF();
int status = SafeNativeMethods.Gdip.GdipCombineRegionRect(new HandleRef(this, nativeRegion), ref gprectf, CombineMode.Complement);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
// int version
///
/// Updates this
public void Complement(Rectangle rect) {
GPRECT gprect = new GPRECT(rect);
int status = SafeNativeMethods.Gdip.GdipCombineRegionRectI(new HandleRef(this, nativeRegion), ref gprect, CombineMode.Complement);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Updates this
public void Complement(GraphicsPath path) {
if (path == null)
throw new ArgumentNullException("path");
int status = SafeNativeMethods.Gdip.GdipCombineRegionPath(new HandleRef(this, nativeRegion), new HandleRef(path, path.nativePath), CombineMode.Complement);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
///
/// Updates this
///
public void Complement(Region region) {
if (region == null)
throw new ArgumentNullException("region");
int status = SafeNativeMethods.Gdip.GdipCombineRegionRegion(new HandleRef(this, nativeRegion), new HandleRef(region, region.nativeRegion), CombineMode.Complement);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
/**
* Transform operations
*/
///
/// Offsets the coordinates of this
public void Translate(float dx, float dy) {
int status = SafeNativeMethods.Gdip.GdipTranslateRegion(new HandleRef(this, nativeRegion), dx, dy);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Offsets the coordinates of this
public void Translate(int dx, int dy) {
int status = SafeNativeMethods.Gdip.GdipTranslateRegionI(new HandleRef(this, nativeRegion), dx, dy);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
///
/// Transforms this
public void Transform(Matrix matrix) {
if (matrix == null)
throw new ArgumentNullException("matrix");
int status = SafeNativeMethods.Gdip.GdipTransformRegion(new HandleRef(this, nativeRegion),
new HandleRef(matrix, matrix.nativeMatrix));
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
}
/**
* Get region attributes
*/
///
/// Returns a
public RectangleF GetBounds(Graphics g) {
if (g == null)
throw new ArgumentNullException("g");
GPRECTF gprectf = new GPRECTF();
int status = SafeNativeMethods.Gdip.GdipGetRegionBounds(new HandleRef(this, nativeRegion), new HandleRef(g, g.NativeGraphics), ref gprectf);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return gprectf.ToRectangleF();
}
///
/// Returns a Windows handle to this
public IntPtr GetHrgn(Graphics g) {
if (g == null)
throw new ArgumentNullException("g");
IntPtr hrgn = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipGetRegionHRgn(new HandleRef(this, nativeRegion), new HandleRef(g, g.NativeGraphics), out hrgn);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return hrgn;
}
///
///
/// Tests whether this
///
public bool IsEmpty(Graphics g) {
if (g == null)
throw new ArgumentNullException("g");
int isEmpty;
int status = SafeNativeMethods.Gdip.GdipIsEmptyRegion(new HandleRef(this, nativeRegion), new HandleRef(g, g.NativeGraphics), out isEmpty);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isEmpty != 0;
}
///
///
/// Tests whether this
///
public bool IsInfinite(Graphics g) {
if (g == null)
throw new ArgumentNullException("g");
int isInfinite;
int status = SafeNativeMethods.Gdip.GdipIsInfiniteRegion(new HandleRef(this, nativeRegion), new HandleRef(g, g.NativeGraphics), out isInfinite);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isInfinite != 0;
}
///
///
/// Tests whether the specified
///
public bool Equals(Region region, Graphics g) {
if (g == null)
throw new ArgumentNullException("g");
if (region == null)
throw new ArgumentNullException("region");
int isEqual;
int status = SafeNativeMethods.Gdip.GdipIsEqualRegion(new HandleRef(this, nativeRegion), new HandleRef(region, region.nativeRegion), new HandleRef(g, g.NativeGraphics), out isEqual);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isEqual != 0;
}
///
/// Returns a
public RegionData GetRegionData() {
int regionSize = 0;
int status = SafeNativeMethods.Gdip.GdipGetRegionDataSize(new HandleRef(this, nativeRegion), out regionSize);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
if (regionSize == 0)
return null;
byte[] regionData = new byte[regionSize];
status = SafeNativeMethods.Gdip.GdipGetRegionData(new HandleRef(this, nativeRegion), regionData, regionSize, out regionSize);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return new RegionData(regionData);
}
/*
* Hit testing operations
*/
// float version
///
///
/// Tests whether the specified point is
/// contained within this
///
public bool IsVisible(float x, float y) {
return IsVisible(new PointF(x, y), null);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(PointF point) {
return IsVisible(point, null);
}
///
///
/// Tests whether the specified point is contained within this
///
public bool IsVisible(float x, float y, Graphics g) {
return IsVisible(new PointF(x, y), g);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(PointF point, Graphics g) {
int isVisible;
int status = SafeNativeMethods.Gdip.GdipIsVisibleRegionPoint(new HandleRef(this, nativeRegion), point.X, point.Y,
new HandleRef(g, (g==null) ? IntPtr.Zero : g.NativeGraphics),
out isVisible);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isVisible != 0;
}
///
///
/// Tests whether the specified rectangle is contained within this
///
public bool IsVisible(float x, float y, float width, float height) {
return IsVisible(new RectangleF(x, y, width, height), null);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(RectangleF rect) {
return IsVisible(rect, null);
}
///
///
/// Tests whether the specified rectangle is contained within this
///
public bool IsVisible(float x, float y, float width, float height, Graphics g) {
return IsVisible(new RectangleF(x, y, width, height), g);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(RectangleF rect, Graphics g) {
int isVisible = 0;
int status = SafeNativeMethods.Gdip.GdipIsVisibleRegionRect(new HandleRef(this, nativeRegion), rect.X, rect.Y,
rect.Width, rect.Height,
new HandleRef(g, (g==null) ? IntPtr.Zero : g.NativeGraphics),
out isVisible);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isVisible != 0;
}
// int version
///
///
/// Tests whether the specified point is contained within this
///
public bool IsVisible(int x, int y, Graphics g) {
return IsVisible(new Point(x, y), g);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(Point point) {
return IsVisible(point, null);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(Point point, Graphics g) {
int isVisible = 0;
int status = SafeNativeMethods.Gdip.GdipIsVisibleRegionPointI(new HandleRef(this, nativeRegion), point.X, point.Y,
new HandleRef(g, (g == null) ? IntPtr.Zero : g.NativeGraphics),
out isVisible);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isVisible != 0;
}
///
///
/// Tests whether the specified rectangle is contained within this
///
public bool IsVisible(int x, int y, int width, int height) {
return IsVisible(new Rectangle(x, y, width, height), null);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(Rectangle rect) {
return IsVisible(rect, null);
}
///
///
/// Tests whether the specified rectangle is contained within this
///
public bool IsVisible(int x, int y, int width, int height, Graphics g) {
return IsVisible(new Rectangle(x, y, width, height), g);
}
///
///
/// Tests whether the specified
///
public bool IsVisible(Rectangle rect, Graphics g) {
int isVisible = 0;
int status = SafeNativeMethods.Gdip.GdipIsVisibleRegionRectI(new HandleRef(this, nativeRegion), rect.X, rect.Y,
rect.Width, rect.Height,
new HandleRef(g, (g == null) ? IntPtr.Zero : g.NativeGraphics),
out isVisible);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
return isVisible != 0;
}
///
///
/// Returns an array of
///
[SuppressMessage("Microsoft.Performance", "CA1808:AvoidCallsThatBoxValueTypes")]
public RectangleF[] GetRegionScans(Matrix matrix) {
if (matrix == null)
throw new ArgumentNullException("matrix");
int count = 0;
// call first time to get actual count of rectangles
int status = SafeNativeMethods.Gdip.GdipGetRegionScansCount(new HandleRef(this, nativeRegion),
out count,
new HandleRef(matrix, matrix.nativeMatrix));
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
RectangleF[] rectangles;
int rectsize = (int)Marshal.SizeOf(typeof(GPRECTF));
IntPtr memoryRects = Marshal.AllocHGlobal(rectsize*count);
try {
status = SafeNativeMethods.Gdip.GdipGetRegionScans(new HandleRef(this, nativeRegion),
memoryRects,
out count,
new HandleRef(matrix, matrix.nativeMatrix));
if (status != SafeNativeMethods.Gdip.Ok) {
throw SafeNativeMethods.Gdip.StatusException(status);
}
int index;
GPRECTF gprectf = new GPRECTF();
rectangles = new RectangleF[count];
for (index=0; index
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