private void InitializeResources(GraphicsDevice graphicsDevice, int width, int height)
{
try
{
Debug.Assert(_renderTarget == null, "Dispose previous back buffer before creating a new back buffer.");
// MonoGame
var format = _enableAlpha ? SurfaceFormat.Bgra32 : SurfaceFormat.Bgr32;
_renderTarget = new RenderTarget2D(graphicsDevice, width, height, false, format, DepthFormat.Depth24Stencil8, 0, RenderTargetUsage.DiscardContents);
// Direct3D 11
var device11 = (SharpDX.Direct3D11.Device)graphicsDevice.Handle;
var formatDXGI = D3D11Helper.ToD3D11(format);
_texture11 = D3D11Helper.CreateSharedResource(device11, width, height, formatDXGI);
_stagingResource11 = D3D11Helper.CreateStagingResource(device11, _texture11);
// Direct3D 9
_texture9 = _d3D9.CreateSharedTexture(_texture11);
_surface9 = _texture9.GetSurfaceLevel(0);
_stagingResource9 = _d3D9.CreateStagingResource(_texture11);
// Direct3D 11 event query.
Debug.Assert(_isFrameReady, "_isFrameReady should be true when uninitialized.");
var queryDescription = new SharpDX.Direct3D11.QueryDescription
{
Flags = SharpDX.Direct3D11.QueryFlags.None,
Type = SharpDX.Direct3D11.QueryType.Event
};
_query = new SharpDX.Direct3D11.Query(device11, queryDescription);
// Assign back buffer to D3DImage.
// The back buffer is still empty, however we need to set a valid back buffer
// for the layout logic. Otherwise, the size of the D3D11Image is (0, 0).
Lock();
#if NET45
SetBackBuffer(D3DResourceType.IDirect3DSurface9, _surface9.NativePointer, true);
#else
SetBackBuffer(D3DResourceType.IDirect3DSurface9, _surface9.NativePointer);
#endif
Unlock();
if (IsSynchronized)
{
// Issue a copy of the surface into the staging resource to see when the
// resource is no longer used by Direct3D 9.
_d3D9.Copy(_surface9, _stagingResource9);
_isAvailable9 = _d3D9.TryAccess(_stagingResource9);
}
}
catch
{
// GPU may run out of memory.
UninitializeResources();
throw;
}
}
/// <summary>
/// Unlocks the back buffer and disables render operations.
/// </summary>
/// <param name="graphicsDevice">The graphics device.</param>
public void EndRender(GraphicsDevice graphicsDevice)
{
if (!_isLocked) // May appear due to WPF bug (see above).
{
return;
}
ThrowIfDisposed();
var device11 = (SharpDX.Direct3D11.Device)graphicsDevice.Handle;
try
{
if (_renderTarget == null)
{
// BeginRender was unsuccessful. (GPU out-of-memory exception.)
return;
}
// Double-buffering: Copy MonoGame render target into shared resource.
D3D11Helper.Copy(device11, (SharpDX.Direct3D11.Texture2D)_renderTarget.Handle, _texture11);
// Place Direct3D 11 event query.
device11.ImmediateContext.End(_query);
SharpDX.Bool result;
_isFrameReady = device11.ImmediateContext.GetData(_query, out result) && result;
if (IsSynchronized)
{
// Issue a copy of the surface into the staging resource to see when the
// resource is no longer used by Direct3D 11.
D3D11Helper.Copy(device11, _texture11, _stagingResource11);
// Block until the surface is no longer used by Direct3D 11.
D3D11Helper.Access(device11, _stagingResource11);
}
else
{
// For optimal performance, explicitly flush command buffers.
graphicsDevice.Flush();
}
// Note: Redundant calls to SetBackBuffer() are a no-op.
#if NET45
SetBackBuffer(D3DResourceType.IDirect3DSurface9, _surface9.NativePointer, true);
#else
SetBackBuffer(D3DResourceType.IDirect3DSurface9, _surface9.NativePointer);
#endif
if (IsSynchronized)
{
// Issue a copy of the surface into the staging resource to see when the
// resource is no longer used by Direct3D 9.
_d3D9.Copy(_surface9, _stagingResource9);
_isAvailable9 = _d3D9.TryAccess(_stagingResource9);
}
AddDirtyRect(new Int32Rect(0, 0, PixelWidth, PixelHeight));
}
finally
{
Unlock();
_isLocked = false;
}
}