public DxGlContext([NotNull] GLWpfControlSettings settings)
{
DXInterop.Direct3DCreate9Ex(DXInterop.DefaultSdkVersion, out var dxContextHandle);
DxContextHandle = dxContextHandle;
var deviceParameters = new PresentationParameters
{
Windowed = 1,
SwapEffect = SwapEffect.Discard,
DeviceWindowHandle = IntPtr.Zero,
PresentationInterval = 0,
BackBufferFormat = Format.X8R8G8B8, // this is like A8 R8 G8 B8, but avoids issues with Gamma correction being applied twice.
BackBufferWidth = 1,
BackBufferHeight = 1,
AutoDepthStencilFormat = Format.Unknown,
BackBufferCount = 1,
EnableAutoDepthStencil = 0,
Flags = 0,
FullScreen_RefreshRateInHz = 0,
MultiSampleQuality = 0,
MultiSampleType = MultisampleType.None
};
DXInterop.CreateDeviceEx(
dxContextHandle,
0,
DeviceType.HAL, // use hardware rasterization
IntPtr.Zero,
CreateFlags.HardwareVertexProcessing |
CreateFlags.Multithreaded |
CreateFlags.PureDevice,
ref deviceParameters,
IntPtr.Zero,
out var dxDeviceHandle);
DxDeviceHandle = dxDeviceHandle;
// if the graphics context is null, we use the shared context.
if (settings.ContextToUse != null)
{
GraphicsContext = settings.ContextToUse;
}
else
{
GraphicsContext = GetOrCreateSharedOpenGLContext(settings);
}
GlDeviceHandle = Wgl.DXOpenDeviceNV(dxDeviceHandle);
}
protected bool RegisterDxDevice()
{
// Device already registered?
if (_glDeviceHandle != IntPtr.Zero)
{
return(true);
}
// No device or DXInterop not supported, fallback to base
// implementation of rendering to a GL texture.
if (_dxDevice == null || !Wgl.CurrentExtensions.DXInterop_NV)
{
_glDeviceHandle = IntPtr.Zero;
return(false);
}
// Register the dx device
_glDeviceHandle = Wgl.DXOpenDeviceNV(_dxDevice.NativePointer);
return(_glDeviceHandle != IntPtr.Zero);
}
