Implementation of the Diligent::IDeviceContextGL interface. More...

Inheritance diagram for Diligent::DeviceContextGLImpl:

Public Member Functions
virtual void	QueryInterface (const Diligent::INTERFACE_ID &IID, IObject **ppInterface) override final
	Queries the specific interface, see IObject::QueryInterface() for details.

virtual void	SetPipelineState (IPipelineState *pPipelineState) override final
	Base implementation of IDeviceContext::SetPipelineState(); caches references to the pipeline state object.

virtual void	TransitionShaderResources (IPipelineState pPipelineState, IShaderResourceBinding pShaderResourceBinding) override final
	Transitions shader resources to the require states. More...

virtual void	CommitShaderResources (IShaderResourceBinding *pShaderResourceBinding, Uint32 Flags) override final
	Commits shader resources to the device context. More...

virtual void	SetStencilRef (Uint32 StencilRef) override final
	Sets the stencil reference value. More...

virtual void	SetBlendFactors (const float *pBlendFactors=nullptr) override final

virtual void	SetVertexBuffers (Uint32 StartSlot, Uint32 NumBuffersSet, IBuffer *ppBuffers, Uint32 pStrides, Uint32 *pOffsets, Uint32 Flags) override final
	Base implementation of IDeviceContext::SetVertexBuffers(); validates parameters and caches references to the buffers.

virtual void	ClearState () override final
	Clears the context state.

virtual void	SetIndexBuffer (IBuffer *pIndexBuffer, Uint32 ByteOffset) override final
	Base implementation of IDeviceContext::SetIndexBuffer(); caches the strong reference to the index buffer.

virtual void	SetViewports (Uint32 NumViewports, const Viewport *pViewports, Uint32 RTWidth, Uint32 RTHeight) override final
	Sets an array of viewports. More...

virtual void	SetScissorRects (Uint32 NumRects, const Rect *pRects, Uint32 RTWidth, Uint32 RTHeight) override final
	Sets active scissor rects. More...

virtual void	SetRenderTargets (Uint32 NumRenderTargets, ITextureView ppRenderTargets[], ITextureView pDepthStencil) override final
	Binds one or more render targets and the depth-stencil buffer to the pipeline. It also sets the viewport to match the first non-null render target or depth-stencil buffer. More...

virtual void	Draw (DrawAttribs &DrawAttribs) override final
	Executes a draw command. More...

virtual void	DispatchCompute (const DispatchComputeAttribs &DispatchAttrs) override final
	Executes a dispatch compute command. More...

virtual void	ClearDepthStencil (ITextureView *pView, Uint32 ClearFlags, float fDepth, Uint8 Stencil) override final
	Clears a depth-stencil view. More...

virtual void	ClearRenderTarget (ITextureView pView, const float RGBA) override final
	Clears a render target view. More...

virtual void	Flush () override final
	Flushes the command buffer.

virtual void	FinishCommandList (class ICommandList **ppCommandList) override final
	Finishes recording commands and generates a command list. More...

virtual void	ExecuteCommandList (class ICommandList *pCommandList) override final
	Executes recorded commands in a command list. More...

Public Member Functions inherited from Diligent::DeviceContextBase< IDeviceContextGL >
	DeviceContextBase (IMemoryAllocator &RawMemAllocator, IRenderDevice *pRenderDevice, bool bIsDeferred)

bool	CommitShaderResources (IShaderResourceBinding *pShaderResourceBinding, Uint32 Flags, int)
	Base implementation of IDeviceContext::CommitShaderResources(); validates parameters.

void	SetViewports (Uint32 NumViewports, const Viewport *pViewports, Uint32 &RTWidth, Uint32 &RTHeight)
	Caches the viewports.

void	SetScissorRects (Uint32 NumRects, const Rect *pRects, Uint32 &RTWidth, Uint32 &RTHeight)
	Caches the scissor rects.

bool	SetRenderTargets (Uint32 NumRenderTargets, ITextureView ppRenderTargets[], ITextureView pDepthStencil, Uint32 Dummy=0)
	Caches the render target and depth stencil views. Returns true if any view is different from the cached value and false otherwise.

void	SetSwapChain (ISwapChain *pSwapChain)
	Sets the strong pointer to the swap chain.

ISwapChain *	GetSwapChain ()
	Returns the swap chain.

bool	IsDefaultFBBound ()
	Returns true if currently bound frame buffer is the default frame buffer.

void	GetPipelineState (IPipelineState *ppPSO, float BlendFactors, Uint32 &StencilRef)
	Returns currently bound pipeline state and blend factors.

void	GetRenderTargets (Uint32 &NumRenderTargets, ITextureView ppRTVs, ITextureView ppDSV)
	Returns currently bound render targets.

void	GetViewports (Uint32 &NumViewports, Viewport *pViewports)
	Returns currently set viewports.

IRenderDevice *	GetDevice ()
	Returns the render device.

Public Member Functions inherited from Diligent::RefCountedObject< IDeviceContextGL, IMemoryAllocator >
virtual IReferenceCounters *	GetReferenceCounters () const override final

virtual Atomics::Long	AddRef () override

virtual Atomics::Long	Release () override

Additional Inherited Members
Protected Member Functions inherited from Diligent::DeviceContextBase< IDeviceContextGL >
void	GetRenderTargetSize (Uint32 &RTWidth, Uint32 &RTHeight)
	Returns the size of the currently bound render target.

void	ClearStateCache ()
	Clears all cached resources.

Protected Attributes inherited from Diligent::DeviceContextBase< IDeviceContextGL >
RefCntAutoPtr< IRenderDevice >	m_pDevice
	Strong reference to the device.

RefCntAutoPtr< ISwapChain >	m_pSwapChain
	Strong reference to the swap chain. Swap chain holds weak reference to the immediate context.

VertexStreamInfo	m_VertexStreams [MaxBufferSlots]
	Vertex streams. Every stream holds strong reference to the buffer.

Uint32	m_NumVertexStreams
	Number of bound vertex streams.

RefCntAutoPtr< IPipelineState >	m_pPipelineState
	Strong reference to the bound pipeline state object.

RefCntAutoPtr< IBuffer >	m_pIndexBuffer
	Strong reference to the bound index buffer.

Uint32	m_IndexDataStartOffset
	Offset from the beginning of the index buffer to the start of the index data, in bytes.

Uint32	m_StencilRef
	Current stencil reference value.

Float32	m_BlendFactors [4]
	Curent blend factors.

Viewport	m_Viewports [MaxRenderTargets]
	Current viewports.

Uint32	m_NumViewports
	Number of current viewports.

Rect	m_ScissorRects [MaxRenderTargets]
	Current scissor rects.

Uint32	m_NumScissorRects
	Number of current scissor rects.

RefCntAutoPtr< ITextureView >	m_pBoundRenderTargets [MaxRenderTargets]
	Vector of strong references to the bound render targets.

Uint32	m_NumBoundRenderTargets
	Number of bound render targets.

RefCntAutoPtr< ITextureView >	m_pBoundDepthStencil
	Strong references to the bound depth stencil view.

Detailed Description

Implementation of the Diligent::IDeviceContextGL interface.

Member Function Documentation

void Diligent::DeviceContextGLImpl::ClearDepthStencil	(	ITextureView *	pView,
		Uint32	ClearFlags,
		float	fDepth,
		Uint8	Stencil
	)

finaloverridevirtual

Clears a depth-stencil view.

Parameters

[in]	pView	- Pointer to ITextureView interface to clear. The view type must be Diligent::TEXTURE_VIEW_DEPTH_STENCIL.
[in]	ClearFlags	- Idicates which parts of the buffer to clear, see Diligent::CLEAR_DEPTH_STENCIL_FLAGS.
[in]	fDepth	- Value to clear depth part of the view with.
[in]	Stencil	- Value to clear stencil part of the view with.

Remarks: The full extent of the view is always cleared. Viewport and scissor settings are not applied.

Note: The depth-stencil view must be bound to the pipeline for clear operation to be performed.

Implements Diligent::IDeviceContext.

void Diligent::DeviceContextGLImpl::ClearRenderTarget	(	ITextureView *	pView,
		const float *	RGBA
	)

finaloverridevirtual

Clears a render target view.

Parameters

[in]	pView	- Pointer to ITextureView interface to clear. The view type must be Diligent::TEXTURE_VIEW_RENDER_TARGET.
[in]	RGBA	- A 4-component array that represents the color to fill the render target with. If nullptr is provided, the default array {0,0,0,0} will be used.

Remarks: The full extent of the view is always cleared. Viewport and scissor settings are not applied.

Note: The render target view must be bound to the pipeline for clear operation to be performed.

Implements Diligent::IDeviceContext.

void Diligent::DeviceContextGLImpl::CommitShaderResources	(	IShaderResourceBinding *	pShaderResourceBinding,
		Uint32	Flags
	)

finaloverridevirtual

Commits shader resources to the device context.

Parameters

[in]	pShaderResourceBinding	- Shader resource binding whose resources will be committed. If pipeline state contains no shader resources, this parameter can be null.
[in]	Flags	- Additional flags for the operation. See Diligent::COMMIT_SHADER_RESOURCES_FLAG for a list of allowed values.

Remarks: Pipeline state object that was used to create the shader resource binding must be bound to the pipeline when CommitShaderResources() is called. If no pipeline state object is bound or the pipeline state object does not match shader resource binding, the method will fail.
If Diligent::COMMIT_SHADER_RESOURCES_FLAG_TRANSITION_RESOURCES flag is specified, the engine will also transition all shader resources to the correct state. If the flag is not specified, it is assumed that all resources are already in correct states.
Resources can be explicitly transitioned to the required states by calling IDeviceContext::TransitionShaderResources()

Implements Diligent::IDeviceContext.

void Diligent::DeviceContextGLImpl::DispatchCompute ( const DispatchComputeAttribs & DispatchAttrs )

finaloverridevirtual

Executes a dispatch compute command.

Parameters

[in] DispatchAttrs - Structure describing dispatch command attributes, see DispatchComputeAttribs for details.

Implements Diligent::IDeviceContext.

void Diligent::DeviceContextGLImpl::Draw ( DrawAttribs & DrawAttribs )

finaloverridevirtual

Executes a draw command.

Parameters

[in] DrawAttribs - Structure describing draw command attributes, see DrawAttribs for details.

Implements Diligent::IDeviceContext.

void Diligent::DeviceContextGLImpl::ExecuteCommandList ( class ICommandList * pCommandList )

finaloverridevirtual

Executes recorded commands in a command list.

Parameters

[in] pCommandList - Pointer to the command list to executre.

Remarks: After command list is executed, it is no longer valid and should be released.

Implements Diligent::IDeviceContext.

void Diligent::DeviceContextGLImpl::FinishCommandList ( class ICommandList ** ppCommandList )

finaloverridevirtual

Finishes recording commands and generates a command list.

Parameters

[out] ppCommandList - Memory location where pointer to the recorded command list will be written.

Implements Diligent::IDeviceContext.

void Diligent::DeviceContextGLImpl::SetBlendFactors ( const float * pBlendFactors = nullptr )

finaloverridevirtual

Parameters

[in] pBlendFactors - Array of four blend factors, one for each RGBA component. Theses factors are used if the blend state uses one of the Diligent::BLEND_FACTOR_BLEND_FACTOR or Diligent::BLEND_FACTOR_INV_BLEND_FACTOR blend factors. If nullptr is provided, default blend factors array {1,1,1,1} will be used.

Implements Diligent::IDeviceContext.

void Diligent::DeviceContextGLImpl::SetRenderTargets	(	Uint32	NumRenderTargets,
		ITextureView *	ppRenderTargets[],
		ITextureView *	pDepthStencil
	)

finaloverridevirtual

Binds one or more render targets and the depth-stencil buffer to the pipeline. It also sets the viewport to match the first non-null render target or depth-stencil buffer.

Parameters

[in]	NumRenderTargets	- Number of render targets to bind.
[in]	ppRenderTargets	- Array of pointers to ITextureView that represent the render targets to bind to the device. The type of each view in the array must be Diligent::TEXTURE_VIEW_RENDER_TARGET.
[in]	pDepthStencil	- Pointer to the ITextureView that represents the depth stencil to bind to the device. The view type must be Diligent::TEXTURE_VIEW_DEPTH_STENCIL.

Remarks

The device context will keep strong references to all bound render target and depth-stencil views. Thus these views (and consequently referenced textures) cannot be released until they are unbound from the context.
Any render targets not defined by this call are set to nullptr.

You can set the default render target and depth stencil using the following call:

pContext->SetRenderTargets(0, nullptr, nullptr);

Implements Diligent::IDeviceContext.

void Diligent::DeviceContextGLImpl::SetScissorRects	(	Uint32	NumRects,
		const Rect *	pRects,
		Uint32	RTWidth,
		Uint32	RTHeight
	)

finaloverridevirtual

Sets active scissor rects.

Parameters

[in]	NumRects	- Number of scissor rectangles to set.
[in]	pRects	- An array of Rect structures describing the scissor rectangles to bind.
[in]	RTWidth	- Render target width. If 0 is provided, width of the currently bound render target will be used.
[in]	RTHeight	- Render target height. If 0 is provided, height of the currently bound render target will be used.

Remarks: DirectX and OpenGL use different window coordinate systems. In DirectX, the coordinate system origin is in the left top corner of the screen with Y axis pointing down. In OpenGL, the origin is in the left bottom corener of the screen with Y axis pointing up. Render target size is required to convert viewport from DirectX to OpenGL coordinate system if OpenGL device is used.

All scissor rects must be set atomically as one operation. Any rects not defined by the call are disabled.

Implements Diligent::IDeviceContext.

void Diligent::DeviceContextGLImpl::SetStencilRef ( Uint32 StencilRef )

finaloverridevirtual

Sets the stencil reference value.

Parameters

[in] StencilRef - Stencil reference value.

Implements Diligent::IDeviceContext.

void Diligent::DeviceContextGLImpl::SetViewports	(	Uint32	NumViewports,
		const Viewport *	pViewports,
		Uint32	RTWidth,
		Uint32	RTHeight
	)

finaloverridevirtual

Sets an array of viewports.

Parameters

[in]	NumViewports	- Number of viewports to set.
[in]	pViewports	- An array of Viewport structures describing the viewports to bind.
[in]	RTWidth	- Render target width. If 0 is provided, width of the currently bound render target will be used.
[in]	RTHeight-	Render target height. If 0 is provided, height of the currently bound render target will be used.

Remarks

DirectX and OpenGL use different window coordinate systems. In DirectX, the coordinate system origin is in the left top corner of the screen with Y axis pointing down. In OpenGL, the origin is in the left bottom corener of the screen with Y axis pointing up. Render target size is required to convert viewport from DirectX to OpenGL coordinate system if OpenGL device is used.

All viewports must be set atomically as one operation. Any viewports not defined by the call are disabled.

You can set the viewport size to match the currently bound render target using the following call:

pContext->SetViewports(1, nullptr, 0, 0);

Implements Diligent::IDeviceContext.

void Diligent::DeviceContextGLImpl::TransitionShaderResources	(	IPipelineState *	pPipelineState,
		IShaderResourceBinding *	pShaderResourceBinding
	)

finaloverridevirtual

Transitions shader resources to the require states.

Parameters

[in]	pPipelineState	- Pipeline state object that was used to create the shader resource binding.
[in]	pShaderResourceBinding	- Shader resource binding whose resources will be transitioned.

Remarks: This method explicitly transitiones all resources to the correct states. If this method was called, there is no need to specify Diligent::COMMIT_SHADER_RESOURCES_FLAG_TRANSITION_RESOURCES when calling IDeviceContext::CommitShaderResources()

Implements Diligent::IDeviceContext.

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation