public Element ElementAdd(Update update, Display display, int layer, Rectangle dest_rect, Resource resource, Rectangle src_rect, Protection protection, Alpha alpha, Clamp clamp, DISPMANX_TRANSFORM_T transform)
{
if (update == null)
{
throw new ArgumentNullException(nameof(update));
}
if (display == null)
{
throw new ArgumentNullException(nameof(display));
}
if (protection == null)
{
throw new ArgumentNullException(nameof(protection));
}
VC_RECT_T d = dest_rect;
VC_RECT_T s = src_rect;
VC_DISPMANX_ALPHA_T nativeAlpha = alpha?.Native;
DISPMANX_CLAMP_T nativeClamp = clamp?.Native;
DISPMANX_RESOURCE_HANDLE_T resHandle = resource?.Handle ?? DISPMANX_RESOURCE_HANDLE_T.Null;
DISPMANX_ELEMENT_HANDLE_T handle = NativeMethods.ElementAdd(update.Handle, display.Handle, layer, ref d, resHandle, ref s, protection.Handle, ref nativeAlpha, ref nativeClamp, transform);
if (handle.Handle == IntPtr.Zero)
{
return(null);
}
return(new Element(handle));
}
/// <summary>
/// Start a new update
/// </summary>
/// <param name="priority"></param>
/// <returns></returns>
public Update UpdateStart(int priority)
{
DISPMANX_UPDATE_HANDLE_T handle = NativeMethods.UpdateStart(priority);
if (handle.Handle == IntPtr.Zero)
{
return(null);
}
return(new Update(handle));
}
/// <summary>
/// Create a new resource
/// </summary>
/// <param name="type"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
public Resource CreateResource(VC_IMAGE_TYPE_T type, int width, int height)
{
DISPMANX_RESOURCE_HANDLE_T handle = NativeMethods.ResourceCreate(type, (uint)width, (uint)height, out IntPtr imagePtr);
if (handle.Handle == IntPtr.Zero)
{
return(null);
}
return(new Resource(handle, type, imagePtr));
}
/// <summary>
/// Opens an offscreen display
/// </summary>
/// <param name="dest"></param>
/// <param name="orientation"></param>
/// <returns></returns>
public Display DisplayOpenOffscreen(Resource dest, DISPMANX_TRANSFORM_T orientation)
{
DISPMANX_DISPLAY_HANDLE_T handle = NativeMethods.DisplayOpenOffscreen(dest.Handle, orientation);
if (handle.Handle == IntPtr.Zero)
{
return(null);
}
return(new Display(handle));
}
/// <summary>
/// Opens a display on the given device
/// </summary>
/// <param name="device"></param>
/// <returns></returns>
public Display DisplayOpen(Screen device)
{
DISPMANX_DISPLAY_HANDLE_T handle = NativeMethods.DisplayOpen((DISPMAN_ID)(int)device);
if (handle.Handle == IntPtr.Zero)
{
return(null);
}
return(new Display(handle));
}
public bool ElementRemove(Update update, Element element)
{
if (update == null)
{
throw new ArgumentNullException(nameof(update));
}
if (element == null)
{
throw new ArgumentNullException(nameof(element));
}
var status = NativeMethods.ElementRemove(update.Handle, element.Handle);
return(status == DISPMANX_STATUS_T.SUCCESS);
}
