QNullGraphicsPipeline Struct Reference

#include <qrhinull_p.h>

Inheritance diagram for QNullGraphicsPipeline:

Collaboration diagram for QNullGraphicsPipeline:

Public Member Functions
	QNullGraphicsPipeline (QRhiImplementation *rhi)
	~QNullGraphicsPipeline ()
void	destroy () override
	Releases (or requests deferred releasing of) the underlying native graphics resources.
bool	create () override
	Creates the corresponding native graphics resources.
Public Member Functions inherited from QRhiGraphicsPipeline
QRhiResource::Type	resourceType () const override
Flags	flags () const
void	setFlags (Flags f)
	Sets the flags f.
Topology	topology () const
void	setTopology (Topology t)
	Sets the primitive topology t.
CullMode	cullMode () const
void	setCullMode (CullMode mode)
	Sets the specified face culling mode.
FrontFace	frontFace () const
void	setFrontFace (FrontFace f)
	Sets the front face mode f.
void	setTargetBlends (std::initializer_list< TargetBlend > list)
	Sets the list of render target blend settings.
template<typename InputIterator >
void	setTargetBlends (InputIterator first, InputIterator last)
	Sets the list of render target blend settings from the iterators first and last.
const TargetBlend *	cbeginTargetBlends () const
const TargetBlend *	cendTargetBlends () const
const TargetBlend *	targetBlendAt (qsizetype index) const
qsizetype	targetBlendCount () const
bool	hasDepthTest () const
void	setDepthTest (bool enable)
	Enables or disables depth testing based on enable.
bool	hasDepthWrite () const
void	setDepthWrite (bool enable)
	Controls the writing out of depth data into the depth buffer based on enable.
CompareOp	depthOp () const
void	setDepthOp (CompareOp op)
	Sets the depth comparison function op.
bool	hasStencilTest () const
void	setStencilTest (bool enable)
	Enables or disables stencil tests based on enable.
StencilOpState	stencilFront () const
void	setStencilFront (const StencilOpState &state)
	Sets the stencil test state for front faces.
StencilOpState	stencilBack () const
void	setStencilBack (const StencilOpState &state)
	Sets the stencil test state for back faces.
quint32	stencilReadMask () const
void	setStencilReadMask (quint32 mask)
	Sets the stencil read mask.
quint32	stencilWriteMask () const
void	setStencilWriteMask (quint32 mask)
	Sets the stencil write mask.
int	sampleCount () const
void	setSampleCount (int s)
	Sets the sample count.
float	lineWidth () const
void	setLineWidth (float width)
	Sets the line width.
int	depthBias () const
void	setDepthBias (int bias)
	Sets the depth bias.
float	slopeScaledDepthBias () const
void	setSlopeScaledDepthBias (float bias)
	Sets the slope scaled depth bias.
void	setShaderStages (std::initializer_list< QRhiShaderStage > list)
	Sets the list of shader stages.
template<typename InputIterator >
void	setShaderStages (InputIterator first, InputIterator last)
	Sets the list of shader stages from the iterators first and last.
const QRhiShaderStage *	cbeginShaderStages () const
const QRhiShaderStage *	cendShaderStages () const
const QRhiShaderStage *	shaderStageAt (qsizetype index) const
qsizetype	shaderStageCount () const
QRhiVertexInputLayout	vertexInputLayout () const
void	setVertexInputLayout (const QRhiVertexInputLayout &layout)
	Specifies the vertex input layout.
QRhiShaderResourceBindings *	shaderResourceBindings () const
void	setShaderResourceBindings (QRhiShaderResourceBindings *srb)
	Associates with srb describing the resource binding layout and the resources (QRhiBuffer, QRhiTexture) themselves.
QRhiRenderPassDescriptor *	renderPassDescriptor () const
void	setRenderPassDescriptor (QRhiRenderPassDescriptor *desc)
	Associates with the specified QRhiRenderPassDescriptor desc.
int	patchControlPointCount () const
void	setPatchControlPointCount (int count)
	Sets the number of patch control points to count.
PolygonMode	polygonMode () const
void	setPolygonMode (PolygonMode mode)
	Sets the polygon mode.
int	multiViewCount () const
void	setMultiViewCount (int count)
	Sets the view count for multiview rendering.
Public Member Functions inherited from QRhiResource
virtual	~QRhiResource ()
	Destructor.
void	deleteLater ()
	When called without a frame being recorded, this function is equivalent to deleting the object.
QByteArray	name () const
void	setName (const QByteArray &name)
	Sets a name for the object.
quint64	globalResourceId () const
QRhi *	rhi () const

Additional Inherited Members
Public Types inherited from QRhiGraphicsPipeline
enum	Flag { UsesBlendConstants = 1 << 0 , UsesStencilRef = 1 << 1 , UsesScissor = 1 << 2 , CompileShadersWithDebugInfo = 1 << 3 }
	Flag values for describing the dynamic state of the pipeline, and other options. More...
enum	Topology {   Triangles , TriangleStrip , TriangleFan , Lines ,   LineStrip , Points , Patches }
	Specifies the primitive topology. More...
enum	CullMode { None , Front , Back }
	Specifies the culling mode. More...
enum	FrontFace { CCW , CW }
	Specifies the front face winding order. More...
enum	ColorMaskComponent { R = 1 << 0 , G = 1 << 1 , B = 1 << 2 , A = 1 << 3 }
	Flag values for specifying the color write mask. More...
enum	BlendFactor {   Zero , One , SrcColor , OneMinusSrcColor ,   DstColor , OneMinusDstColor , SrcAlpha , OneMinusSrcAlpha ,   DstAlpha , OneMinusDstAlpha , ConstantColor , OneMinusConstantColor ,   ConstantAlpha , OneMinusConstantAlpha , SrcAlphaSaturate , Src1Color ,   OneMinusSrc1Color , Src1Alpha , OneMinusSrc1Alpha }
	Specifies the blend factor. More...
enum	BlendOp {   Add , Subtract , ReverseSubtract , Min ,   Max }
	Specifies the blend operation. More...
enum	CompareOp {   Never , Less , Equal , LessOrEqual ,   Greater , NotEqual , GreaterOrEqual , Always }
	Specifies the depth or stencil comparison function. More...
enum	StencilOp {   StencilZero , Keep , Replace , IncrementAndClamp ,   DecrementAndClamp , Invert , IncrementAndWrap , DecrementAndWrap }
	Specifies the stencil operation. More...
enum	PolygonMode { Fill , Line }
	Specifies the polygon rasterization mode. More...
Public Types inherited from QRhiResource
enum	Type {   Buffer , Texture , Sampler , RenderBuffer ,   RenderPassDescriptor , SwapChainRenderTarget , TextureRenderTarget , ShaderResourceBindings ,   GraphicsPipeline , SwapChain , ComputePipeline , CommandBuffer }
	Specifies type of the resource. More...
Protected Member Functions inherited from QRhiGraphicsPipeline
	QRhiGraphicsPipeline (QRhiImplementation *rhi)
	\variable QRhiGraphicsPipeline::StencilOpState::failOp
Protected Member Functions inherited from QRhiResource
	QRhiResource (QRhiImplementation *rhi)
Protected Attributes inherited from QRhiGraphicsPipeline
Flags	m_flags
Topology	m_topology = Triangles
CullMode	m_cullMode = None
FrontFace	m_frontFace = CCW
QVarLengthArray< TargetBlend, 8 >	m_targetBlends
bool	m_depthTest = false
bool	m_depthWrite = false
CompareOp	m_depthOp = Less
bool	m_stencilTest = false
StencilOpState	m_stencilFront
StencilOpState	m_stencilBack
quint32	m_stencilReadMask = 0xFF
quint32	m_stencilWriteMask = 0xFF
int	m_sampleCount = 1
float	m_lineWidth = 1.0f
int	m_depthBias = 0
float	m_slopeScaledDepthBias = 0.0f
int	m_patchControlPointCount = 3
PolygonMode	m_polygonMode = Fill
int	m_multiViewCount = 0
QVarLengthArray< QRhiShaderStage, 4 >	m_shaderStages
QRhiVertexInputLayout	m_vertexInputLayout
QRhiShaderResourceBindings *	m_shaderResourceBindings = nullptr
QRhiRenderPassDescriptor *	m_renderPassDesc = nullptr
Protected Attributes inherited from QRhiResource
QRhiImplementation *	m_rhi = nullptr
quint64	m_id
QByteArray	m_objectName

Detailed Description

Definition at line 128 of file qrhinull_p.h.

Constructor & Destructor Documentation

QNullGraphicsPipeline()

QNullGraphicsPipeline::QNullGraphicsPipeline

(

QRhiImplementation *

rhi

)

Definition at line 909 of file qrhinull.cpp.

~QNullGraphicsPipeline()

QNullGraphicsPipeline::~QNullGraphicsPipeline

(

)

Definition at line 914 of file qrhinull.cpp.

References destroy().

Here is the call graph for this function:

Member Function Documentation

create()

bool QNullGraphicsPipeline::create ( )

overridevirtual

Creates the corresponding native graphics resources.

If there are already resources present due to an earlier create() with no corresponding destroy(), then destroy() is called implicitly first.

Returns

true when successful, false when a graphics operation failed. Regardless of the return value, calling destroy() is always safe.

Note

This may be, depending on the underlying graphics API, an expensive operation, especially when shaders get compiled/optimized from source or from an intermediate bytecode format to the GPU's own instruction set. Where applicable, the QRhi backend automatically sets up the relevant non-persistent facilities to accelerate this, for example the Vulkan backend automatically creates a VkPipelineCache to improve data reuse during the lifetime of the application.

Drivers may also employ various persistent (disk-based) caching strategies for shader and pipeline data, which is hidden to and is outside of Qt's control. In some cases, depending on the graphics API and the QRhi backend, there are facilities within QRhi for manually managing such a cache, allowing the retrieval of a serializable blob that can then be reloaded in the future runs of the application to ensure faster pipeline creation times. See QRhi::pipelineCacheData() and QRhi::setPipelineCacheData() for details. Note also that when working with a QRhi instance managed by a higher level Qt framework, such as Qt Quick, it is possible that such disk-based caching is taken care of automatically, for example QQuickWindow uses a disk-based pipeline cache by default (which comes in addition to any driver-level caching).

Implements QRhiGraphicsPipeline.

Definition at line 926 of file qrhinull.cpp.

References QRHI_RES_RHI.

destroy()

void QNullGraphicsPipeline::destroy ( )

overridevirtual

Releases (or requests deferred releasing of) the underlying native graphics resources.

Safe to call multiple times, subsequent invocations will be a no-op then.

Once destroy() is called, the QRhiResource instance can be reused, by calling create() again. That will then result in creating new native graphics resources underneath.

Note

Resources referenced by commands for the current frame should not be released until the frame is submitted by QRhi::endFrame().

The QRhiResource destructor also performs the same task, so calling this function is not necessary before deleting a QRhiResource.

See also

deleteLater()

Implements QRhiResource.

Definition at line 919 of file qrhinull.cpp.

References QRHI_RES_RHI.

Referenced by ~QNullGraphicsPipeline().

Here is the caller graph for this function:

---

The documentation for this struct was generated from the following files:

• qtbase/src/gui/rhi/qrhinull_p.h (1dd8b5ceec3a1cde987372a7f993c07f30e5af95)
• qtbase/src/gui/rhi/qrhinull.cpp (684070bc342ac8e041c7156f0aa594b89b2265db)