#include <qrhinull_p.h>

Inheritance diagram for QNullTextureRenderTarget:

Collaboration diagram for QNullTextureRenderTarget:

Public Member Functions
	QNullTextureRenderTarget (QRhiImplementation *rhi, const QRhiTextureRenderTargetDescription &desc, Flags flags)

	~QNullTextureRenderTarget ()

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

QSize	pixelSize () const override

float	devicePixelRatio () const override

int	sampleCount () const override

QRhiRenderPassDescriptor *	newCompatibleRenderPassDescriptor () override

bool	create () override
	Creates the corresponding native graphics resources.

Public Member Functions inherited from QRhiTextureRenderTarget
QRhiResource::Type	resourceType () const override

QRhiTextureRenderTargetDescription	description () const

void	setDescription (const QRhiTextureRenderTargetDescription &desc)
	Sets the render target description desc.

Flags	flags () const

void	setFlags (Flags f)
	Sets the flags to f.

virtual QRhiRenderPassDescriptor *	newCompatibleRenderPassDescriptor ()=0

virtual bool	create ()=0
	Creates the corresponding native graphics resources.

Public Member Functions inherited from QRhiRenderTarget
virtual QSize	pixelSize () const =0

virtual float	devicePixelRatio () const =0

virtual int	sampleCount () const =0

QRhiRenderPassDescriptor *	renderPassDescriptor () const

void	setRenderPassDescriptor (QRhiRenderPassDescriptor *desc)
	Sets the QRhiRenderPassDescriptor desc for use with this render target.

Public Member Functions inherited from QRhiResource
virtual	~QRhiResource ()
	Destructor.

virtual Type	resourceType () const =0

virtual void	destroy ()=0
	Releases (or requests deferred releasing of) the underlying native graphics resources.

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

Public Attributes
QNullRenderTargetData	d

Additional Inherited Members
Public Types inherited from QRhiTextureRenderTarget
enum	Flag { PreserveColorContents = 1 << 0 , PreserveDepthStencilContents = 1 << 1 }
	Flag values describing the load/store behavior for the render target. 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 QRhiTextureRenderTarget
	QRhiTextureRenderTarget (QRhiImplementation *rhi, const QRhiTextureRenderTargetDescription &desc_, Flags flags_)

Protected Member Functions inherited from QRhiRenderTarget
	QRhiRenderTarget (QRhiImplementation *rhi)

Protected Member Functions inherited from QRhiResource
	QRhiResource (QRhiImplementation *rhi)

Protected Attributes inherited from QRhiTextureRenderTarget
QRhiTextureRenderTargetDescription	m_desc

Flags	m_flags

Protected Attributes inherited from QRhiRenderTarget
QRhiRenderPassDescriptor *	m_renderPassDesc = nullptr

Protected Attributes inherited from QRhiResource
QRhiImplementation *	m_rhi = nullptr

quint64	m_id

QByteArray	m_objectName

Detailed Description

Definition at line 103 of file qrhinull_p.h.

Constructor & Destructor Documentation

◆ QNullTextureRenderTarget()

QNullTextureRenderTarget::QNullTextureRenderTarget	(	QRhiImplementation *	rhi,
		const QRhiTextureRenderTargetDescription &	desc,
		Flags	flags
	)

Definition at line 810 of file qrhinull.cpp.

◆ ~QNullTextureRenderTarget()

QNullTextureRenderTarget::~QNullTextureRenderTarget ( )

Definition at line 818 of file qrhinull.cpp.

References destroy().

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Member Function Documentation

◆ create()

bool QNullTextureRenderTarget::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.

Note: renderPassDescriptor() must be set before calling create(). To obtain a QRhiRenderPassDescriptor compatible with the render target, call newCompatibleRenderPassDescriptor() before create() but after setting all other parameters, such as description() and flags(). To save resources, reuse the same QRhiRenderPassDescriptor with multiple QRhiTextureRenderTarget instances, whenever possible. Sharing the same render pass descriptor is only possible when the render targets have the same number and type of attachments (the actual textures can differ) and the same flags.; resources, such as QRhiTexture instances, referenced in description() must already have create() called on them.

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

Implements QRhiTextureRenderTarget.

Definition at line 838 of file qrhinull.cpp.

References QRhiTextureRenderTargetDescription::cbeginColorAttachments(), QRhiTextureRenderTargetDescription::cendColorAttachments(), QNullRenderTargetData::currentResIdList, d, QRhiTextureRenderTargetDescription::depthStencilBuffer(), QRhiTextureRenderTargetDescription::depthTexture(), QRhiColorAttachment::level(), QRhiTextureRenderTarget::m_desc, QRhiRenderTarget::m_renderPassDesc, QRhiTexture::pixelSize(), QRhiRenderBuffer::pixelSize(), QNullRenderTargetData::pixelSize, QRHI_RES, QRHI_RES_RHI, QRhiColorAttachment::renderBuffer(), QNullRenderTargetData::rp, and QRhiColorAttachment::texture().

Referenced by QRhiNull::beginPass(), and pixelSize().

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◆ destroy()

void QNullTextureRenderTarget::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 823 of file qrhinull.cpp.

References QRHI_RES_RHI.

Referenced by ~QNullTextureRenderTarget().

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◆ devicePixelRatio()

float QNullTextureRenderTarget::devicePixelRatio ( ) const

overridevirtual

Returns

the device pixel ratio. For QRhiTextureRenderTarget this is always

For targets retrieved from a QRhiSwapChain the value reflects the \l{QWindow::devicePixelRatio()}{device pixel ratio} of the targeted QWindow.

Implements QRhiRenderTarget.

Definition at line 865 of file qrhinull.cpp.

References d, and QNullRenderTargetData::dpr.

◆ newCompatibleRenderPassDescriptor()

QRhiRenderPassDescriptor * QNullTextureRenderTarget::newCompatibleRenderPassDescriptor ( )

overridevirtual

Returns: a new QRhiRenderPassDescriptor that is compatible with this render target.

The returned value is used in two ways: it can be passed to setRenderPassDescriptor() and QRhiGraphicsPipeline::setRenderPassDescriptor(). A render pass descriptor describes the attachments (color, depth/stencil) and the load/store behavior that can be affected by flags(). A QRhiGraphicsPipeline can only be used in combination with a render target that has a \l{QRhiRenderPassDescriptor::isCompatible()}{compatible} QRhiRenderPassDescriptor set.

Two QRhiTextureRenderTarget instances can share the same render pass descriptor as long as they have the same number and type of attachments. The associated QRhiTexture or QRhiRenderBuffer instances are not part of the render pass descriptor so those can differ in the two QRhiTextureRenderTarget instances.

Note: resources, such as QRhiTexture instances, referenced in description() must already have create() called on them.

See also: create()

Implements QRhiTextureRenderTarget.

Definition at line 830 of file qrhinull.cpp.

References QRhiResource::m_rhi, and QRHI_RES_RHI.

◆ pixelSize()

QSize QNullTextureRenderTarget::pixelSize ( ) const

overridevirtual

Returns: the size in pixels.

Valid only after create() has been called successfully. Until then the result is a default-constructed QSize.

With QRhiTextureRenderTarget the returned size is the size of the associated attachments at the time of create(), in practice the size of the first color attachment, or the depth/stencil buffer if there are no color attachments. If the associated textures or renderbuffers are resized and rebuilt afterwards, then pixelSize() performs an implicit call to create() in order to rebuild the underlying data structures. This implicit check is similar to what QRhiCommandBuffer::beginPass() does, and ensures that the returned size is always up-to-date.

Implements QRhiRenderTarget.

Definition at line 857 of file qrhinull.cpp.

References create(), QNullRenderTargetData::currentResIdList, d, QRhiTextureRenderTarget::m_desc, and QNullRenderTargetData::pixelSize.

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