public static extern int DwmGetWindowAttribute(IntPtr hwnd, int dwAttribute, out RECT lpRect, int size);
public bool Equals(RECT Rectangle)
{
return Rectangle.Left == _Left && Rectangle.Top == _Top && Rectangle.Right == _Right && Rectangle.Bottom == _Bottom;
}
public RECT(RECT rectangle)
: this(rectangle.Left, rectangle.Top, rectangle.Right, rectangle.Bottom)
{
}
private static extern int GdipBitmapApplyEffect(IntPtr bitmap, IntPtr effect, ref RECT rectOfInterest, bool useAuxData, IntPtr auxData, int auxDataSize);
/// <summary>
/// Use the GDI+ blur effect on the bitmap
/// </summary>
/// <param name="destinationBitmap">Bitmap to apply the effect to</param>
/// <param name="area">Rectangle to apply the blur effect to</param>
/// <param name="radius">0-255</param>
/// <param name="expandEdges">bool true if the edges are expanded with the radius</param>
/// <returns>false if there is no GDI+ available or an exception occured</returns>
public static bool ApplyBlur(Bitmap destinationBitmap, Rectangle area, int radius, bool expandEdges)
{
if (!IsBlurPossible(radius))
{
return false;
}
IntPtr hBlurParams = IntPtr.Zero;
IntPtr hEffect = IntPtr.Zero;
try
{
// Create a BlurParams struct and set the values
BlurParams blurParams = new BlurParams();
blurParams.Radius = radius;
blurParams.ExpandEdges = expandEdges;
// Allocate space in unmanaged memory
hBlurParams = Marshal.AllocHGlobal(Marshal.SizeOf(blurParams));
// Copy the structure to the unmanaged memory
Marshal.StructureToPtr(blurParams, hBlurParams, false);
// Create the GDI+ BlurEffect, using the Guid
int status = GdipCreateEffect(BlurEffectGuid, out hEffect);
// Set the blurParams to the effect
GdipSetEffectParameters(hEffect, hBlurParams, (uint)Marshal.SizeOf(blurParams));
// Somewhere it said we can use destinationBitmap.GetHbitmap(), this doesn't work!!
// Get the private nativeImage property from the Bitmap
IntPtr hBitmap = GetNativeImage(destinationBitmap);
// Create a RECT from the Rectangle
RECT rec = new RECT(area);
// Apply the effect to the bitmap in the specified area
GdipBitmapApplyEffect(hBitmap, hEffect, ref rec, false, IntPtr.Zero, 0);
// Everything worked, return true
return true;
}
catch (Exception ex)
{
isBlurEnabled = false;
LOG.Error("Problem using GdipBitmapApplyEffect: ", ex);
return false;
}
finally
{
try
{
if (hEffect != IntPtr.Zero)
{
// Delete the effect
GdipDeleteEffect(hEffect);
}
if (hBlurParams != IntPtr.Zero)
{
// Free the memory
Marshal.FreeHGlobal(hBlurParams);
}
}
catch (Exception ex)
{
isBlurEnabled = false;
LOG.Error("Problem cleaning up ApplyBlur: ", ex);
}
}
}
public static extern int GetWindowRect(IntPtr hWnd, out RECT lpRect);
public static extern int GetClientRect(IntPtr hWnd, out RECT lpRect);
public static extern int GetClipBox(IntPtr hdc, out RECT lprc);
