public static DXGI_MODE_DESC1?FindClosestMatchingMode1(this IDXGIOutput1 output, DXGI_MODE_DESC1 modeToMatch, object concernedDevice)
{
if (output == null)
{
throw new ArgumentNullException(nameof(output));
}
if (output.FindClosestMatchingMode1(ref modeToMatch, out var closest, ComObject.Unwrap(concernedDevice)).IsError)
{
return(null);
}
return(closest);
}
public static ComObject <IDXGIOutputDuplication> DuplicateOutput(this IDXGIOutput1 output, object device, bool throwOnError = true)
{
if (output == null)
{
throw new ArgumentNullException(nameof(output));
}
if (device == null)
{
throw new ArgumentNullException(nameof(device));
}
device = ComObject.Unwrap(device);
// this wonderful magic (mess) is because of a horrible bug in DXGI
// https://social.msdn.microsoft.com/Forums/windowsdesktop/en-US/0c28328a-100a-4d6f-9a08-44a452d3ca6a/idxgioutputduplication-implementation-bug?forum=windowssdk#0c28328a-100a-4d6f-9a08-44a452d3ca6a
output.DuplicateOutput(device, out var unk).ThrowOnError(throwOnError);
if (unk == IntPtr.Zero)
{
return(null);
}
// we copy the original COM's vtable to our process
var vtablePtr = Marshal.ReadIntPtr(unk);
var vtable = new IDXGIOutputDuplicationVTable();
Marshal.PtrToStructure(vtablePtr, vtable);
// patch QueryInterface so it works (route to our code)
var wrapper = new Wrapper(unk);
vtable.QueryInterfacePtr = Marshal.GetFunctionPointerForDelegate <QueryInterfaceFn>(wrapper.QueryInterface);
using (var newVtablePtr = new ComMemory(Marshal.SizeOf <IDXGIOutputDuplicationVTable>()))
{
Marshal.StructureToPtr(vtable, newVtablePtr.Pointer, false);
// create a new vtable for the CLR
using (var newUnk = new ComMemory(IntPtr.Size))
{
Marshal.WriteIntPtr(newUnk.Pointer, newVtablePtr.Pointer);
var dup = (IDXGIOutputDuplication)Marshal.GetObjectForIUnknown(newUnk.Pointer);
return(new ComObject <IDXGIOutputDuplication>(dup));
}
}
}
public static IComObject <T> CreateSwapChainForComposition <T>(this IDXGIFactory2 factory,
IDXGIDevice1 device,
DXGI_SWAP_CHAIN_DESC1 desc,
IDXGIOutput1 restrictToOutput = null) where T : IDXGISwapChain1
{
if (factory == null)
{
throw new ArgumentNullException(nameof(factory));
}
if (device == null)
{
throw new ArgumentNullException(nameof(device));
}
factory.CreateSwapChainForComposition(device, ref desc, restrictToOutput, out var swapChain).ThrowOnError();
return(new ComObject <T>((T)swapChain));
}
public static IReadOnlyList <DXGI_MODE_DESC1> GetDisplayModeList1(this IDXGIOutput1 output, DXGI_FORMAT format, DXGI_ENUM_MODES modes)
{
if (output == null)
{
throw new ArgumentNullException(nameof(output));
}
var list = new List <DXGI_MODE_DESC1>();
uint num = 0;
output.GetDisplayModeList(format, (uint)modes, ref num, null);
if (num > 0)
{
var array = new DXGI_MODE_DESC1[num];
output.GetDisplayModeList1(format, (uint)modes, ref num, array);
list.AddRange(array);
}
return(list);
}
public static ComObject <T> CreateSwapChainForHwnd <T>(this IDXGIFactory2 factory,
IDXGIDevice1 device,
IntPtr hwnd,
DXGI_SWAP_CHAIN_DESC1 desc,
DXGI_SWAP_CHAIN_FULLSCREEN_DESC?fullScreenDesc = null,
IDXGIOutput1 restrictToOutput = null) where T : IDXGISwapChain1
{
if (factory == null)
{
throw new ArgumentNullException(nameof(factory));
}
if (device == null)
{
throw new ArgumentNullException(nameof(device));
}
using (var mem = fullScreenDesc.StructureToMemory())
{
factory.CreateSwapChainForHwnd(device, hwnd, ref desc, mem.Pointer, restrictToOutput, out var swapChain).ThrowOnError();
return(new ComObject <T>((T)swapChain));
}
}
