public RectangleF GetBounds()
{
lock (SyncRoot) {
using (SystemLayer.NullGraphics nullGraphics = new SystemLayer.NullGraphics()) {
return(gdiRegion.GetBounds(nullGraphics.Graphics));
}
}
}
/// <summary>
/// Retrieves an array of rectangles that approximates a region, and computes the
/// pixel area of it. This method is necessary to work around some bugs in .NET
/// and to increase performance for the way in which we typically use this data.
/// </summary>
/// <param name="region">The Region to retrieve data from.</param>
/// <param name="scans">An array of Rectangle to put the scans into.</param>
/// <param name="area">An integer to write the computed area of the region into.</param>
/// <remarks>
/// Note to implementors: Simple implementations may simple call region.GetRegionScans()
/// and process the data for the 'out' variables.</remarks>
public static void GetRegionScans(Region region, out Rectangle[] scans, out int area)
{
using (NullGraphics nullGraphics = new NullGraphics()) {
IntPtr hRgn = IntPtr.Zero;
try {
hRgn = region.GetHrgn(nullGraphics.Graphics);
GetRegionScans(hRgn, out scans, out area);
} finally {
if (hRgn != IntPtr.Zero)
{
SafeNativeMethods.DeleteObject(hRgn);
hRgn = IntPtr.Zero;
}
}
}
GC.KeepAlive(region);
}
/// <summary>
/// Retrieves an array of rectangles that approximates a region, and computes the
/// pixel area of it. This method is necessary to work around some bugs in .NET
/// and to increase performance for the way in which we typically use this data.
/// </summary>
/// <param name="region">The Region to retrieve data from.</param>
/// <param name="scans">An array of Rectangle to put the scans into.</param>
/// <param name="area">An integer to write the computed area of the region into.</param>
/// <remarks>
/// Note to implementors: Simple implementations may simple call region.GetRegionScans()
/// and process the data for the 'out' variables.</remarks>
public static void GetRegionScans(Region region, out Rectangle[] scans, out int area)
{
using (NullGraphics nullGraphics = new NullGraphics())
{
IntPtr hRgn = IntPtr.Zero;
try
{
hRgn = region.GetHrgn(nullGraphics.Graphics);
GetRegionScans(hRgn, out scans, out area);
}
finally
{
if (hRgn != IntPtr.Zero)
{
SafeNativeMethods.DeleteObject(hRgn);
hRgn = IntPtr.Zero;
}
}
}
GC.KeepAlive(region);
}
public RectangleF GetBounds()
{
lock (SyncRoot)
{
using (SystemLayer.NullGraphics nullGraphics = new SystemLayer.NullGraphics())
{
return gdiRegion.GetBounds(nullGraphics.Graphics);
}
}
}