private static unsafe Bitmap[] CaptureCompositeScreenshot(ref ScreenshotTask data)
{
// Generate a rectangle with the size of all monitors combined
Rectangle totalSize = Rectangle.Empty;
foreach (Screen s in Screen.AllScreens)
{
totalSize = Rectangle.Union(totalSize, s.Bounds);
}
var rct = new WindowsRect();
if (WindowsApi.DwmGetWindowAttribute(data.WindowHandle, DwmWindowAttribute.ExtendedFrameBounds, ref rct, sizeof(WindowsRect)) != 0)
{
// DwmGetWindowAttribute() failed, usually means Aero is disabled so we fall back to GetWindowRect()
WindowsApi.GetWindowRect(data.WindowHandle, ref rct);
}
else
{
// DwmGetWindowAttribute() succeeded
}
// Get DPI of the window (this only works properly on Win 10 1607+) but it is not really needed until Win 11 anyway
int DPI = 96;
try
{
DPI = WindowsApi.GetDpiForWindow(data.WindowHandle);
}
catch { }
// Adjust margin for DPI
double scalingFactor = DPI / 96;
int backdropOffset = Convert.ToInt32(100 * scalingFactor);
// Add a 100px margin for window shadows. Excess transparency is trimmed out later
rct.Left -= backdropOffset;
rct.Right += backdropOffset;
rct.Top -= backdropOffset;
rct.Bottom += backdropOffset;
// These next 4 checks handle if the window is outside of the visible screen
if (rct.Left < totalSize.Left)
{
rct.Left = totalSize.Left;
}
if (rct.Right > totalSize.Right)
{
rct.Right = totalSize.Right;
}
if (rct.Top < totalSize.Top)
{
rct.Top = totalSize.Top;
}
if (rct.Bottom > totalSize.Bottom)
{
rct.Bottom = totalSize.Bottom;
}
// Spawning backdrop
// Handling as much as possible in the constructor makes this easier to render, which makes capture less likely to fail on underpowered PCs
Color tmpColor = Color.White;
var backdrop = new Form
{
BackColor = tmpColor,
FormBorderStyle = FormBorderStyle.None,
ShowInTaskbar = false,
//Opacity = 0,
Size = new Size(rct.Right - rct.Left, rct.Bottom - rct.Top),
StartPosition = FormStartPosition.Manual,
Location = new Point(rct.Left, rct.Top)
};
WindowsApi.ShowWindow(backdrop.Handle, 4);
if (!WindowsApi.SetWindowPos(backdrop.Handle, data.WindowHandle, rct.Left, rct.Top, rct.Right - rct.Left, rct.Bottom - rct.Top, SWP_NOACTIVATE))
{
// We are unable to put backdrop directly behind the window, so we will put it into the foreground and then put the original window on top of it
// This likely happens because the program we're trying to capture is running as administrator
WindowsApi.SetWindowPos(backdrop.Handle, IntPtr.Zero, rct.Left, rct.Top, rct.Right - rct.Left, rct.Bottom - rct.Top, SWP_NOACTIVATE);
WindowsApi.SetForegroundWindow(data.WindowHandle).ToString();
}
RefreshBackdrop();
// Capture screenshot with white background
Bitmap whiteShot = CaptureScreenRegion(new Rectangle(rct.Left, rct.Top, rct.Right - rct.Left, rct.Bottom - rct.Top));
backdrop.BackColor = Color.Black;
RefreshBackdrop();
// Capture screenshot with black background
Bitmap blackShot = CaptureScreenRegion(new Rectangle(rct.Left, rct.Top, rct.Right - rct.Left, rct.Bottom - rct.Top));
Bitmap transparentImage;
Bitmap transparentInactiveImage = null;
Bitmap transparentWhiteImage = null;
Bitmap transparentWhiteInactiveImage = null;
Bitmap transparentMaskImage = null;
Bitmap transparentTransparentImage = null;
Bitmap transparentTransparentInactiveImage = null;
transparentImage = DifferentiateAlpha(whiteShot, blackShot, false);
if (data.SaveActiveLight)
{
transparentWhiteImage = DifferentiateAlpha(whiteShot, blackShot, true);
}
whiteShot.Dispose();
blackShot.Dispose();
//Capture black mask screenshot
if (data.SaveMask)
{
int minAlpha = 0;
bool isCompositing = false;
bool ShadowToggled = false;
bool ColorToggled = false;
try
{
WindowsApi.DwmIsCompositionEnabled(out isCompositing);
}
catch (Exception)
{
//OS doesn't have a supported version of DWM
}
//We can't disable shadows on Vista without disabling DWM, which would cause the mask to be inaccurate
UInt32 ColorizationColor = 0;
bool fOpaque = true;
if (isCompositing && (VersionHelpers.IsWindowsVista() || VersionHelpers.IsWindows11()))
{
minAlpha = 254;
WindowsApi.DwmGetColorizationColor(out ColorizationColor, out fOpaque);
if (fOpaque == false)
{
WindowsApi.DwmpSetColorization(ColorizationColor, true, 0xFF);
ColorToggled = true;
}
}
else if (ShadowEnabled())
{
WindowsApi.SystemParametersInfo(SPI_SETDROPSHADOW, 0, false, 0);
ShadowToggled = true;
}
backdrop.BackColor = Color.White;
RefreshBackdrop();
Bitmap whiteMaskShot = CaptureScreenRegion(new Rectangle(rct.Left, rct.Top, rct.Right - rct.Left, rct.Bottom - rct.Top));
backdrop.BackColor = Color.Black;
RefreshBackdrop();
Bitmap blackMaskShot = CaptureScreenRegion(new Rectangle(rct.Left, rct.Top, rct.Right - rct.Left, rct.Bottom - rct.Top));
transparentMaskImage = CreateMask(DifferentiateAlpha(whiteMaskShot, blackMaskShot, false), minAlpha);
if (ShadowToggled)
{
WindowsApi.SystemParametersInfo(SPI_SETDROPSHADOW, 0, true, 0);
}
if (ColorToggled)
{
WindowsApi.DwmpSetColorization(ColorizationColor, fOpaque, 0xFF);
}
whiteMaskShot.Dispose();
blackMaskShot.Dispose();
}
//Capture active fully transparent
if (data.SaveActiveTransparent)
{
try
{
//win 7
WindowsApi.DWM_COLORIZATION_PARAMS parameters, originalParameters = new WindowsApi.DWM_COLORIZATION_PARAMS();
//win vista
UInt32 ColorizationColor = 0;
bool fOpaque = true;
if (VersionHelpers.IsWindowsVista())
{
WindowsApi.DwmGetColorizationColor(out ColorizationColor, out fOpaque);
if (fOpaque == false)
{
WindowsApi.DwmpSetColorization(0xFFFFFF, false, 0xFF);
}
}
else
{
WindowsApi.DwmGetColorizationParameters(out parameters);
WindowsApi.DwmGetColorizationParameters(out originalParameters);
//Set custom fully transparent parameters
parameters.clrAfterGlowBalance = 0;
parameters.clrBlurBalance = 100;
parameters.nIntensity = 0;
// Call the DwmSetColorizationParameters to make the change take effect.
WindowsApi.DwmSetColorizationParameters(ref parameters, false);
}
backdrop.BackColor = Color.White;
RefreshBackdrop();
Bitmap whiteTransparentShot = CaptureScreenRegion(new Rectangle(rct.Left, rct.Top, rct.Right - rct.Left, rct.Bottom - rct.Top));
backdrop.BackColor = Color.Black;
RefreshBackdrop();
Bitmap blackTransparentShot = CaptureScreenRegion(new Rectangle(rct.Left, rct.Top, rct.Right - rct.Left, rct.Bottom - rct.Top));
transparentTransparentImage = DifferentiateAlpha(whiteTransparentShot, blackTransparentShot, false);
whiteTransparentShot.Dispose();
blackTransparentShot.Dispose();
if (VersionHelpers.IsWindowsVista())
{
WindowsApi.DwmpSetColorization(ColorizationColor, fOpaque, 0xFF);
}
else
{
WindowsApi.DwmSetColorizationParameters(ref originalParameters, false);
}
}
catch (Exception)
{
transparentTransparentImage = new Bitmap(transparentImage);
}
}
//Show form to steal focus
var emptyForm = new Form
{
FormBorderStyle = FormBorderStyle.None,
ShowInTaskbar = false,
Opacity = 0,
};
WindowsApi.ShowWindow(emptyForm.Handle, 5);
WindowsApi.SetWindowPos(emptyForm.Handle, data.WindowHandle, rct.Left, rct.Top, rct.Right - rct.Left, rct.Bottom - rct.Top, 0);
WindowsApi.SetForegroundWindow(emptyForm.Handle);
// Capture inactive screenshots
if (data.SaveInactiveDark || data.SaveInactiveLight)
{
backdrop.BackColor = Color.White;
RefreshBackdrop();
// Capture inactive screenshot with white background
Bitmap whiteInactiveShot = CaptureScreenRegion(new Rectangle(rct.Left, rct.Top, rct.Right - rct.Left, rct.Bottom - rct.Top));
backdrop.BackColor = Color.Black;
RefreshBackdrop();
// Capture inactive screenshot with black background
Bitmap blackInactiveShot = CaptureScreenRegion(new Rectangle(rct.Left, rct.Top, rct.Right - rct.Left, rct.Bottom - rct.Top));
if (data.SaveInactiveDark)
{
transparentInactiveImage = DifferentiateAlpha(whiteInactiveShot, blackInactiveShot, false);
}
if (data.SaveInactiveLight)
{
transparentWhiteInactiveImage = DifferentiateAlpha(whiteInactiveShot, blackInactiveShot, true);
}
whiteInactiveShot.Dispose();
blackInactiveShot.Dispose();
}
//Capture inactive fully transparent
if (data.SaveInactiveTransparent)
{
try
{
//Get original colorization parameters
WindowsApi.DWM_COLORIZATION_PARAMS parameters, originalParameters;
WindowsApi.DwmGetColorizationParameters(out parameters);
WindowsApi.DwmGetColorizationParameters(out originalParameters);
//Set custom fully transparent parameters
parameters.clrAfterGlowBalance = 0;
parameters.clrBlurBalance = 100;
parameters.nIntensity = 0;
// Call the DwmSetColorizationParameters to make the change take effect.
WindowsApi.DwmSetColorizationParameters(ref parameters, false);
backdrop.BackColor = Color.White;
RefreshBackdrop();
Bitmap whiteTransparentInactiveShot = CaptureScreenRegion(new Rectangle(rct.Left, rct.Top, rct.Right - rct.Left, rct.Bottom - rct.Top));
backdrop.BackColor = Color.Black;
RefreshBackdrop();
Bitmap blackTransparentInactiveShot = CaptureScreenRegion(new Rectangle(rct.Left, rct.Top, rct.Right - rct.Left, rct.Bottom - rct.Top));
transparentTransparentInactiveImage = DifferentiateAlpha(whiteTransparentInactiveShot, blackTransparentInactiveShot, false);
whiteTransparentInactiveShot.Dispose();
blackTransparentInactiveShot.Dispose();
WindowsApi.DwmSetColorizationParameters(ref originalParameters, false);
}
catch (Exception)
{
transparentTransparentInactiveImage = new Bitmap(transparentInactiveImage);
}
}
backdrop.Dispose();
emptyForm.Dispose();
if (data.CaptureMouse)
{
DrawCursorToBitmap(transparentImage, new Point(rct.Left, rct.Top));
}
Bitmap[] final = CropEmptyEdges(new[] { transparentImage, transparentInactiveImage, transparentWhiteImage, transparentWhiteInactiveImage, transparentMaskImage, transparentTransparentImage, transparentTransparentInactiveImage }, Color.FromArgb(0, 0, 0, 0), ref data);
// Returns a bitmap with transparency, calculated by differentiating the white and black screenshots
return(final);
}
