/// <summary>
/// Allows the SDL2Window to become transparent.
/// </summary>
/// <param name="handle">
/// Veldrid window handle in IntPtr format.
/// </param>
internal static void InitTransparency(IntPtr handle)
{
GWL_EXSTYLE_CLICKABLE = GetWindowLongPtr(handle, GWL_EXSTYLE);
GWL_EXSTYLE_NOT_CLICKABLE = new IntPtr(
GWL_EXSTYLE_CLICKABLE.ToInt64() | WS_EX_LAYERED | WS_EX_TRANSPARENT);
Margins margins = Margins.FromRectangle(new Rectangle(-1, -1, -1, -1));
DwmExtendFrameIntoClientArea(handle, ref margins);
}
public static void EnableTransparent(IntPtr handle, Rectangle size)
{
int windowLong = GetWindowLong(handle, GWL_EXSTYLE) | WS_EX_LAYERED | WS_EX_TRANSPARENT;
SetWindowLong(handle, GWL_EXSTYLE, new IntPtr(windowLong));
SetLayeredWindowAttributes(handle, 0, 255, LWA_ALPHA);
Margins margins = Margins.FromRectangle(size);
DwmExtendFrameIntoClientArea(handle, ref margins);
}
public static void EnableTransparentByColorRef(IntPtr handle, Rectangle size, int color)
{
var windowLong = GetWindowLong(handle, GWL_EXSTYLE) | WS_EX_LAYERED;
SetWindowLong(handle, GWL_EXSTYLE, new IntPtr(windowLong));
SetLayeredWindowAttributes(handle, (uint)color, 100, LWA_ALPHA | LWA_COLORKEY);
var margins = Margins.FromRectangle(size);
DwmExtendFrameIntoClientArea(handle, ref margins);
}
/// <summary>
/// Allows the SDL2Window to become transparent.
/// </summary>
/// <param name="handle">
/// Veldrid window handle in IntPtr format.
/// </param>
/// <param name="size">
/// Size of the SDL2Window.
/// </param>
public static void EnableTransparent(IntPtr handle, Rectangle size)
{
IntPtr windowLong = GetWindowLongPtr(handle, GWL_EXSTYLE);
windowLong = new IntPtr(windowLong.ToInt64() | WS_EX_LAYERED | WS_EX_TRANSPARENT);
SetWindowLongPtr(handle, GWL_EXSTYLE, windowLong);
Margins margins = Margins.FromRectangle(size);
DwmExtendFrameIntoClientArea(handle, ref margins);
}
