This class provides low level access to the GPU device. More...

#include <IVirtualDevice.h>

Inheritance diagram for IVirtualDevice:

Public Member Functions
virtual unsigned int	ThreadID ()=0
	Returns the thread id of the virtual device. More...

virtual bool	IsValid () const =0
	Gets the status of the device. More...

virtual bool	BeginFrame ()=0
	Begins a frame draw. More...

virtual bool	EndFrame ()=0
	Ends a frame draw. More...

virtual bool	BeginScene ()=0
	Begins a scene draw. More...

virtual bool	EndScene ()=0
	Ends a scene draw. More...

virtual const RasterizerState &	GetRasterizerState ()=0
	Gets the current rasterizer state. More...

virtual void	SetRasterizerState (const RasterizerState &newState)=0
	Sets the current rasterizer state. More...

virtual const DepthStencilState &	GetDepthStencilState ()=0
	Gets the current depth-stencil state. More...

virtual void	SetDepthStencilState (const DepthStencilState &newState)=0
	Sets the current depth stencil state. More...

virtual const BlendState &	GetBlendState ()=0
	Gets the current blend state. More...

virtual void	SetBlendState (const BlendState &newState)=0
	Sets the current depth stencil state. More...

virtual const Box2	Viewport ()=0
	Gets the pixel coordinate viewport for the drawing. More...

virtual void	Viewport (const Box2 *vp)=0
	Sets the pixel coordinate viewport for the drawing. More...

virtual const Point2	DepthRange () const =0
	Gets the depth range. More...

virtual void	DepthRange (const Point2 &depthRange)=0
	Sets the depth range. More...

virtual const Box2	ScissorBox ()=0
	Gets scissor box in pixels. More...

virtual void	ScissorBox (const Box2 *box)=0
	Sets the scissor box in pixels. More...

virtual size_t	VertexStreamCount () const =0
	Gets the number of vertex buffer streams. More...

virtual VertexBufferHandle	GetVertexStream (int nStream) const =0
	Gets the specified vertex buffer stream. More...

virtual void	SetVertexStreams (VertexBufferHandleArray &bufferArray, int *offsetArray=nullptr)=0
	Sets vertex buffer streams. More...

virtual void	SetStreamFormat (const MaxSDK::Graphics::MaterialRequiredStreams &format)=0

virtual int	OutputStreamCount () const =0
	Gets the number of current output vertex buffer streams. More...

virtual SmartHandle	GetOutputStream (int nStream) const =0
	Gets the specified output vertex buffer stream. More...

virtual void	SetOutputStreams (SmartHandleArray &bufferArray, int *offsetArray=nullptr)=0
	Sets the current output vertex buffer stream. More...

virtual void	SetTarget (TargetHandle &target, TargetHandle &zBuffer)=0
	Sets the render target at index 0. More...

virtual void	SetTargets (TargetHandleArray &targetArray, TargetHandle &zBuffer)=0
	Sets multiple render targets. More...

virtual TargetHandle	GetTarget (int index)=0
	Gets the specified render target. More...

virtual size_t	TargetCount ()=0
	Gets the current render target count. More...

virtual TargetHandle	GetZBuffer ()=0
	Gets the current z buffer. More...

virtual IndexBufferHandle	GetIndexBuffer () const =0
	Gets the current index buffer. More...

virtual void	SetIndexBuffer (IndexBufferHandle &indexBuffer)=0
	Sets the current index buffer. More...

virtual void	Draw (PrimitiveType type, int start, int primCount)=0
	Draws part of a set of primitives. More...

virtual void	DrawInstanced (PrimitiveType type, int instanceCount, int start, int primCount)=0
	Draws part of a set of primitives with an instance. More...

virtual void	Clear (BufferClearFlag flags, const AColor &color, float z, int stencil)=0
	Performs a full clear: target( nTargets ) to a given color, z to a given z, stencil to a given stencil. More...

virtual void	ClearRegion (const Box2 &rect, BufferClearFlag flags, const AColor &color, float z, int stencil)=0
	Performs a partial clear: a sub-region of the target/z/stencil is cleared. More...

virtual bool	SetTargetsAndUnorderedAccessViews (TargetHandleArray targets, TargetHandle &zBuffer, VertexBufferHandleArray uavs, unsigned int *initialUAVCounts)=0
	Set Render Targets and Unordered Access View targets. More...

virtual void	ClearUnorderedAccessView (VertexBufferHandle buffer, const unsigned int vals[4])=0
	Clear a Unordered Access View target with initial value. More...

Protected Member Functions
virtual	~IVirtualDevice ()

Additional Inherited Members
Static Public Member Functions inherited from MaxHeapOperators
static UtilExport void *	operator new (size_t size)
	Standard new operator used to allocate objects If there is insufficient memory, an exception will be thrown. More...

static UtilExport void *	operator new (size_t size, const std::nothrow_t &e)
	Standard new operator used to allocate objects if there is insufficient memory, NULL will be returned. More...

static UtilExport void *	operator new (size_t size, const char *filename, int line)
	New operator used to allocate objects that takes the filename and line number where the new was called If there is insufficient memory, an exception will be thrown. More...

static UtilExport void *	operator new (size_t size, int block_type, const char *filename, int line)
	New operator used to allocate objects that takes the type of memory, filename and line number where the new was called If there is insufficient memory, an exception will be thrown. More...

static UtilExport void *	operator new (size_t size, const std::nothrow_t &e, const char *filename, int line)
	New operator used to allocate objects that takes the filename and line number where the new was called If there is insufficient memory, NULL will be returned. More...

static UtilExport void *	operator new (size_t size, unsigned long flags)
	New operator used to allocate objects that takes extra flags to specify special operations If there is insufficient memory, an exception will be thrown. More...

static UtilExport void *	operator new (size_t size, const std::nothrow_t &e, unsigned long flags)
	New operator used to allocate objects that takes extra flags to specify special operations If there is insufficient memory, NULL will be returned. More...

static UtilExport void *	operator new[] (size_t size)
	New operator used to allocate arrays of objects If there is insufficient memory, an exception will be thrown. More...

static UtilExport void *	operator new[] (size_t size, const std::nothrow_t &e)
	New operator used to allocate arrays of objects If there is insufficient memory, NULL will be returned. More...

static UtilExport void *	operator new[] (size_t size, const char *filename, int line)
	New operator used to allocate arrays of objects If there is insufficient memory, an exception will be thrown. More...

static UtilExport void *	operator new[] (size_t size, int block_type, const char *filename, int line)
	New operator used to allocate arrays of objects. More...

static UtilExport void *	operator new[] (size_t size, const std::nothrow_t &e, const char *filename, int line)
	New operator used to allocate arrays of objects If there is insufficient memory, NULL will be returned. More...

static UtilExport void *	operator new[] (size_t size, unsigned long flags)
	New operator used to allocate arrays of objects If there is insufficient memory, an exception will be thrown. More...

static UtilExport void *	operator new[] (size_t size, const std::nothrow_t &e, unsigned long flags)
	New operator used to allocate arrays of objects If there is insufficient memory, NULL will be returned. More...

static UtilExport void	operator delete (void *ptr)
	Standard delete operator used to deallocate an object If the pointer is invalid, an exception will be thrown. More...

static UtilExport void	operator delete (void *ptr, const std::nothrow_t &e)
	Standard delete operator used to deallocate an object If the pointer is invalid, nothing will happen. More...

static UtilExport void	operator delete (void ptr, const char filename, int line)
	Delete operator used to deallocate an object that takes the filename and line number where the delete was called If the pointer is invalid, an exception will be thrown. More...

static UtilExport void	operator delete (void ptr, int block_type, const char filename, int line)
	Delete operator used to deallocate an object that takes the type of memory, filename and line number where the delete was called If the pointer is invalid, an exception will be thrown. More...

static UtilExport void	operator delete (void ptr, const std::nothrow_t &e, const char filename, int line)
	Delete operator used to deallocate an object that takes the filename and line number where the delete was called If the pointer is invalid, nothing will happen. More...

static UtilExport void	operator delete (void *ptr, unsigned long flags)
	Delete operator used to deallocate an object that takes extra flags to specify special operations If the pointer is invalid, an exception will be thrown. More...

static UtilExport void	operator delete (void *ptr, const std::nothrow_t &e, unsigned long flags)
	Delete operator used to deallocate an object that takes extra flags to specify special operations If the pointer is invalid, nothing will happen. More...

static UtilExport void	operator delete[] (void *ptr)
	Standard delete operator used to deallocate an array of objects If the pointer is invalid, an exception will be thrown. More...

static UtilExport void	operator delete[] (void *ptr, const std::nothrow_t &e)
	Standard delete operator used to deallocate an array of objects If the pointer is invalid, nothing will happen. More...

static UtilExport void	operator delete[] (void ptr, const char filename, int line)
	Delete operator used to deallocate an array of objects that takes the filename and line number where the delete was called If the pointer is invalid, an exception will be thrown. More...

static UtilExport void	operator delete[] (void ptr, int block_type, const char filename, int line)
	Delete operator used to deallocate an array of objects that takes the type of memory, filename and line number where the delete was called If the pointer is invalid, an exception will be thrown. More...

static UtilExport void	operator delete[] (void ptr, const std::nothrow_t &e, const char filename, int line)
	Delete operator used to deallocate an array of objects that takes the filename and line number where the delete was called If the pointer is invalid, nothing will happen. More...

static UtilExport void	operator delete[] (void *ptr, unsigned long flags)
	Delete operator used to deallocate an array of objects that takes extra flags to specify special operations If the pointer is invalid, an exception will be thrown. More...

static UtilExport void	operator delete[] (void *ptr, const std::nothrow_t &e, unsigned long flags)
	Delete operator used to deallocate an array of objects that takes extra flags to specify special operations If the pointer is invalid, an exception will be thrown. More...

static UtilExport void *	operator new (size_t size, void *placement_ptr)
	Placement new operator. More...

static UtilExport void	operator delete (void ptr, void placement_ptr)
	Placement delete operator. More...

static UtilExport void *	aligned_malloc (size_t size, size_t alignment)
	Allocates memory on a specified alignment boundary. More...

static UtilExport void *	aligned_realloc (void *ptr, size_t size, size_t alignment)
	Reallocates memory on a specified alignment boundary. More...

static UtilExport void	aligned_free (void *ptr)
	Frees a block of memory that was allocated with aligned_malloc/aligned_realloc. More...

Detailed Description

This class provides low level access to the GPU device.

It wraps the variable 3D API into an unified interface. This means you do not need to know whether the real device is actually Direct3D9, Direct3D11 or OpenGL. Similar to the device interface in Direct3D, this interface provides rendering functions such as Draw() and DrawInstanced(), and resource functions like SetVertexStreams(), SetIndexBuffer() and so on. You can also change render states via Get/SetBlendState(), Get/SetRasterizerState(), and Get/SetDepthStencilState(). For example, to change the Z-Bias of the next draw call, use RasterizerState::SetDepthBias() or RasterizerState::SetSlopeScaledDepthBias().

See also: For information about how to obtain the draw context and work with the Nitrous API, see Low-level Device API and About RenderItem. You should read all the topics on Nitrous before developing Nitrous plugins.

For an example of code that implements this interface, see the sample project in howto/Graphiccs/GPUParticle.

Example Code:

Typical usage of rendering geometry data may look like this:

class SampleItemDX9 : public ICustomRenderItem
  {
        ...
  };
  void SampleItemDX9::Display(DrawContext& dc)
  {
        IVirtualDevice& vd = drawContext.GetVirtualDevice();
        BaseMaterialHandle& material = const_cast<BaseMaterialHandle&>(drawContext.GetMaterial()); //Use draw contextâ€™s material
        vd.SetStreamFormat(const_cast<MaterialRequiredStreams&>(*material.GetRequiredStreams()));
        vd.SetVertexStreams(mVertexBuffer);
        vd.SetIndexBuffer(&mIndexBuffer);
        
        material.Activate(drawContext);
        unsigned int passCount = material.GetPassCount(drawContext);
        for (int pass = 0; pass < passCount; ++pass) //Loop through all passes
        {
             material.ActivatePass(drawContext, pass);
             vd.Draw(PrimitiveTriangleList, 0, (int)mPrimitiveCount);
        }
        material.Terminate(drawContext);
  }

Typical usage of stream-out data may look like this:

//Turn off Z-Buffer
vd.SetDepthStencilState(mDepthOffState);
streamOutEffect.Activate(drawContext);
streamOutEffect.ActivatePass(drawContext, 0);
vd.SetStreamFormat(streamOutEffect.GetStreamFormat());
vd.SetIndexBuffer(nullptr);
vd.SetVertexStreams(mRawDataBuffers);
vd.SetOutputStreams(&mStreamOutBuffers);
vd.Draw(PrimitivePointList, 0, (int)vertexCount);
vd.SetOutputStreams(nullptr);
streamOutEffect.PassesFinished(drawContext);
streamOutEffect.Terminate();
//Restore Z-Buffer state
vd.SetDepthStencilState(mBackupState);

Constructor & Destructor Documentation

◆ ~IVirtualDevice()

virtual ~IVirtualDevice ( )

inlineprotectedvirtual

94 {}

Member Function Documentation

◆ ThreadID()

virtual unsigned int ThreadID ( )

pure virtual

Returns the thread id of the virtual device.

Returns: Return 0 for DirectX9, the real thread id for DirectX11.

◆ IsValid()

virtual bool IsValid ( ) const

pure virtual

Gets the status of the device.

Note: When IsValid is false, all device-related resources may be invalid. Sometimes plugins may attempt to dispose after Nitrous has already done so. At this time, any calls to device resources may cause a crash. Therefore, plugins should check this flag to make sure the device is valid before releasing the resources.

Returns: true if the device is valid. false if not.

◆ BeginFrame()

virtual bool BeginFrame ( )

pure virtual

Begins a frame draw.

Should be paired with EndFrame(). Brackets sets of drawing calls, only 1 level deep allowed.

◆ EndFrame()

virtual bool EndFrame ( )

pure virtual

Ends a frame draw.

Should be paired with BeginFrame().

◆ BeginScene()

virtual bool BeginScene ( )

pure virtual

Begins a scene draw.

Brackets sets of drawing calls. Only 1 level deep allowed.

◆ EndScene()

virtual bool EndScene ( )

pure virtual

Ends a scene draw.

◆ GetRasterizerState()

virtual const RasterizerState& GetRasterizerState ( )

pure virtual

Gets the current rasterizer state.

Returns: The rasterizer state handle.

◆ SetRasterizerState()

virtual void SetRasterizerState ( const RasterizerState & newState )

pure virtual

Sets the current rasterizer state.

Parameters

[in] newState the new rasterizer state.

◆ GetDepthStencilState()

virtual const DepthStencilState& GetDepthStencilState ( )

pure virtual

Gets the current depth-stencil state.

Returns: The depth stencil state handle.

◆ SetDepthStencilState()

virtual void SetDepthStencilState ( const DepthStencilState & newState )

pure virtual

Sets the current depth stencil state.

Parameters

[in] newState The new depth stencil state handle.

◆ GetBlendState()

virtual const BlendState& GetBlendState ( )

pure virtual

Gets the current blend state.

Returns: The current blend state handle.

◆ SetBlendState()

virtual void SetBlendState ( const BlendState & newState )

pure virtual

Sets the current depth stencil state.

Parameters

[in] newState The new blend state handle.

◆ Viewport() [1/2]

virtual const Box2 Viewport ( )

pure virtual

Gets the pixel coordinate viewport for the drawing.

Returns: The viewport's {0,0,w,h}, or {0,0,0,0} if no target is defined.

◆ Viewport() [2/2]

virtual void Viewport ( const Box2 * vp )

pure virtual

Sets the pixel coordinate viewport for the drawing.

Parameters

[in] vp The desired viewport size, or nullptr which means "use the full screen".

◆ DepthRange() [1/2]

virtual const Point2 DepthRange ( ) const

pure virtual

Gets the depth range.

Returns: The depth range, normally between 0.0 to 1.0.

◆ DepthRange() [2/2]

virtual void DepthRange ( const Point2 & depthRange )

pure virtual

Sets the depth range.

Parameters

[in] depthRange The depth range, depthRange.x means near distance, depthRange.y means far distance. Normally the values are in the range 0.0 to 1.0.

◆ ScissorBox() [1/2]

virtual const Box2 ScissorBox ( )

pure virtual

Gets scissor box in pixels.

Returns: The scissor box. The default value is the current render target size.

◆ ScissorBox() [2/2]

virtual void ScissorBox ( const Box2 * box )

pure virtual

Sets the scissor box in pixels.

Parameters

[in] box The scissor box, nullptr means no scissor clip.

◆ VertexStreamCount()

virtual size_t VertexStreamCount ( ) const

pure virtual

Gets the number of vertex buffer streams.

Returns: The current number of active streams.

◆ GetVertexStream()

virtual VertexBufferHandle GetVertexStream ( int nStream ) const

pure virtual

Gets the specified vertex buffer stream.

Parameters

[in] nStream The stream index of the vertex buffer.

Returns: The vertex buffer handle at nStream.

◆ SetVertexStreams()

virtual void SetVertexStreams	(	VertexBufferHandleArray &	bufferArray,
		int *	offsetArray = `nullptr`
	)

pure virtual

Sets vertex buffer streams.

Parameters

[in]	bufferArray	The vertex buffer array.
[in]	offsetArray	offset of each vertex buffer, must have same size as the buffer

◆ SetStreamFormat()

virtual void SetStreamFormat ( const MaxSDK::Graphics::MaterialRequiredStreams & format )

pure virtual

◆ OutputStreamCount()

virtual int OutputStreamCount ( ) const

pure virtual

Gets the number of current output vertex buffer streams.

Returns: The number of current output vertex buffer streams.

◆ GetOutputStream()

virtual SmartHandle GetOutputStream ( int nStream ) const

pure virtual

Gets the specified output vertex buffer stream.

Note: this function only works for DX11 devices.

Parameters

[in] nStream The index of the stream.

Returns: The vertex buffer handle at output nStream. For dx9 devices (feature level < LEVEL_4_0), an invalid handle is returned. Use VertexBufferHandle::IsValid() to check the validity.

◆ SetOutputStreams()

virtual void SetOutputStreams	(	SmartHandleArray &	bufferArray,
		int *	offsetArray = `nullptr`
	)

pure virtual

Sets the current output vertex buffer stream.

Note: The max number of output streams is 0 for DX9 devices, 4 for DX11 devices.

Parameters

[in]	bufferArray	Sets output streams. Use `nullptr` to clear output streams.
[in]	offsetArray	offset of each vertex buffer, must have same size as the buffer. Specify -1 to append to last stream out position.

◆ SetTarget()

virtual void SetTarget	(	TargetHandle &	target,
		TargetHandle &	zBuffer
	)

pure virtual

Sets the render target at index 0.

Parameters

[in]	target	A pointer for the render target handle.
[in]	zBuffer	A pointer for the z buffer handle. The size of zBuffer must be equal to or larger than the target. Can be `nullptr`.

◆ SetTargets()

virtual void SetTargets	(	TargetHandleArray &	targetArray,
		TargetHandle &	zBuffer
	)

pure virtual

Sets multiple render targets.

Parameters

[in]	targetArray	The render targets to be set. All targets must have the same size.
[in]	zBuffer	A pointer to the z buffer handle. The size of zBuffer must be equal to or larger than the render targets. Can be `nullptr`.

◆ GetTarget()

virtual TargetHandle GetTarget ( int index )

pure virtual

Gets the specified render target.

Parameters

[in] index The index of the target. For DX9, the maximum number of the index is 4, for DX11, it's 8.

Returns: The target handle. The handle might be invalid if the corresponding index doesn't exist.

◆ TargetCount()

virtual size_t TargetCount ( )

pure virtual

Gets the current render target count.

Returns: The current target count.

◆ GetZBuffer()

virtual TargetHandle GetZBuffer ( )

pure virtual

Gets the current z buffer.

Returns: The current z buffer. The handle might be invalid if the z buffer doesn't exist.

◆ GetIndexBuffer()

virtual IndexBufferHandle GetIndexBuffer ( ) const

pure virtual

Gets the current index buffer.

Returns: The current index buffer handle.

◆ SetIndexBuffer()

virtual void SetIndexBuffer ( IndexBufferHandle & indexBuffer )

pure virtual

Sets the current index buffer.

Parameters

[in] indexBuffer The index buffer handle. Pass nullptr to clear the current index buffer.

◆ Draw()

virtual void Draw	(	PrimitiveType	type,
		int	start,
		int	primCount
	)

pure virtual

Draws part of a set of primitives.

Parameters

[in]	type	The primitive type.
[in]	start	The start vertex index in the current vertex buffer.
[in]	primCount	The number of primitives to draw.

◆ DrawInstanced()

virtual void DrawInstanced	(	PrimitiveType	type,
		int	instanceCount,
		int	start,
		int	primCount
	)

pure virtual

Draws part of a set of primitives with an instance.

Note: you need call VertexBufferHandle::SetInstanceCount() to set the instance count of the instance data stream.

Parameters

[in]	type	The primitive type.
[in]	instanceCount	The number of instances.
[in]	start	The start vertex index in the current vertex buffer.
[in]	primCount	The number of primitives to draw.

◆ Clear()

virtual void Clear	(	BufferClearFlag	flags,
		const AColor &	color,
		float	z,
		int	stencil
	)

pure virtual

Performs a full clear: target( nTargets ) to a given color, z to a given z, stencil to a given stencil.

The target (or MRT targets), instead of the viewport, is cleared. The clear operation is not affected by the scissor box.

Parameters

[in]	flags	The components to clear.
[in]	color	The color after the clear. Available when ClearBackbuffer or ClearAll is set.
[in]	z	The z value after the clear. Available when ClearDepthBuffer or ClearAll is set.
[in]	stencil	The stencil value after clear. Available when ClearStencilBuffer or ClearAll is set.

◆ ClearRegion()

virtual void ClearRegion	(	const Box2 &	rect,
		BufferClearFlag	flags,
		const AColor &	color,
		float	z,
		int	stencil
	)

pure virtual

Performs a partial clear: a sub-region of the target/z/stencil is cleared.

The region is clipped to the bounds of the viewport rectangle, and the clear operation is not affected by the scissor box.

Parameters

[in]	rect	The region to clear.
[in]	flags	The components to clear.
[in]	color	The color after the clear. Available when ClearBackbuffer or ClearAll is set.
[in]	z	The z value after the clear. Available when ClearDepthBuffer or ClearAll is set.
[in]	stencil	The stencil value after the clear. Available when ClearStencilBuffer or ClearAll is set.

◆ SetTargetsAndUnorderedAccessViews()

virtual bool SetTargetsAndUnorderedAccessViews	(	TargetHandleArray	targets,
		TargetHandle &	zBuffer,
		VertexBufferHandleArray	uavs,
		unsigned int *	initialUAVCounts
	)

pure virtual

Set Render Targets and Unordered Access View targets.

Parameters

[in]	targets	render targets array
[in]	zBuffer	z buffer, can be nullptr
[in]	uavs	UAV targets
[in]	initialUAVCounts	Initial count array of the UAV. The array should be same size as uavs.

◆ ClearUnorderedAccessView()

virtual void ClearUnorderedAccessView	(	VertexBufferHandle	buffer,
		const unsigned int	vals[4]
	)

pure virtual

Clear a Unordered Access View target with initial value.

This API wraps DX11 API, it works on FLOAT, UNORM, and SNORM unordered access views (UAVs), with format conversion from FLOAT to *NORM where appropriate.

Parameters

[in]	buffer	uav buffer to clear
[in]	vals	4 unsigned int values to copy to corresponding UAV's RGBA channels.

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ~IVirtualDevice()

Member Function Documentation

◆ ThreadID()

◆ IsValid()

◆ BeginFrame()

◆ EndFrame()

◆ BeginScene()

◆ EndScene()

◆ GetRasterizerState()

◆ SetRasterizerState()

◆ GetDepthStencilState()

◆ SetDepthStencilState()

◆ GetBlendState()

◆ SetBlendState()

◆ Viewport() [1/2]

◆ Viewport() [2/2]

◆ DepthRange() [1/2]

◆ DepthRange() [2/2]

◆ ScissorBox() [1/2]

◆ ScissorBox() [2/2]

◆ VertexStreamCount()

◆ GetVertexStream()

◆ SetVertexStreams()

◆ SetStreamFormat()

◆ OutputStreamCount()

◆ GetOutputStream()

◆ SetOutputStreams()

◆ SetTarget()

◆ SetTargets()

◆ GetTarget()

◆ TargetCount()

◆ GetZBuffer()

◆ GetIndexBuffer()

◆ SetIndexBuffer()

◆ Draw()

◆ DrawInstanced()

◆ Clear()

◆ ClearRegion()

◆ SetTargetsAndUnorderedAccessViews()

◆ ClearUnorderedAccessView()