private static async Task OpenClipboard()
{
while (!Win32UnmanagedMethods.OpenClipboard(IntPtr.Zero))
{
await Task.Delay(100);
}
}
private static async Task SetBitmapAsync(System.Drawing.Bitmap systemBitmap)
{
//var bitmapStream = new MemoryStream();
//systemBitmapPng.Save(bitmapStream, ImageFormat.Bmp);
//var systemBitmap = new System.Drawing.Bitmap(bitmapStream); // .bmp version imports clearer than .png
var hBitmap = systemBitmap.GetHbitmap();
IntPtr screenDC = Win32UnmanagedMethods.GetDC(IntPtr.Zero);
using var sourceDC = Gdi32UnmanagedMethods.CreateCompatibleDCScoped(screenDC);
if (sourceDC.HDC == IntPtr.Zero)
{
return;
}
IntPtr sourceBitmapSelection = Gdi32UnmanagedMethods.SelectObject(sourceDC, hBitmap);
if (sourceBitmapSelection == IntPtr.Zero)
{
return;
}
using var destDC = Gdi32UnmanagedMethods.CreateCompatibleDCScoped(screenDC);
if (destDC.HDC == IntPtr.Zero)
{
return;
}
IntPtr compatibleBitmap = Gdi32UnmanagedMethods.CreateCompatibleBitmap(screenDC, systemBitmap.Width, systemBitmap.Height);
if (compatibleBitmap == IntPtr.Zero)
{
return;
}
IntPtr destinationBitmapSelection = Gdi32UnmanagedMethods.SelectObject(destDC, compatibleBitmap);
if (destinationBitmapSelection == IntPtr.Zero)
{
return;
}
if (!Gdi32UnmanagedMethods.BitBlt(
destDC,
0,
0,
systemBitmap.Width,
systemBitmap.Height,
sourceDC,
0,
0,
SRCCOPY))
{
throw new Exception("BitBlt failed");
}
try
{
await OpenClipboard();
Win32UnmanagedMethods.EmptyClipboard();
IntPtr result = Win32UnmanagedMethods.SetClipboardData(Win32UnmanagedMethods.ClipboardFormat.CF_BITMAP, compatibleBitmap);
if (result == IntPtr.Zero)
{
int errno = Marshal.GetLastWin32Error();
throw new Exception("SetClipboardData failed: Error = " + errno);
}
}
finally
{
Win32UnmanagedMethods.CloseClipboard();
}
}
