Encapsulates the current rendering state during a call to QSGMaterialShader::updateUniformData() and the other update type of functions. More...

#include <qsgmaterialshader.h>

Collaboration diagram for QSGMaterialShader::RenderState:

Public Types
enum	DirtyState { DirtyMatrix = 0x0001 , DirtyOpacity = 0x0002 , DirtyCachedMaterialData = 0x0004 , DirtyAll = 0xFFFF }
	\value DirtyMatrix Used to indicate that the matrix has changed and must be updated. More...

Public Member Functions
DirtyStates	dirtyStates () const
	Returns which rendering states that have changed and needs to be updated for geometry rendered with this material to conform to the current rendering state.

bool	isMatrixDirty () const
	Returns `true` if the dirtyStates() contain the dirty matrix state, otherwise returns `false`.

bool	isOpacityDirty () const
	Returns `true` if the dirtyStates() contains the dirty opacity state, otherwise returns `false`.

float	opacity () const
	\variable QSGMaterialShader::GraphicsPipelineState::blendEnable

QMatrix4x4	combinedMatrix () const
	Returns the matrix combined of modelview matrix and project matrix.

QMatrix4x4	combinedMatrix (qsizetype index) const

QMatrix4x4	modelViewMatrix () const
	Returns the model view matrix.

QMatrix4x4	projectionMatrix () const
	Returns the projection matrix.

QMatrix4x4	projectionMatrix (qsizetype index) const

qsizetype	projectionMatrixCount () const

QRect	viewportRect () const
	Returns the viewport rect of the surface being rendered to.

QRect	deviceRect () const
	Returns the device rect of the surface being rendered to.

float	determinant () const
	Returns the modelview determinant to be used for rendering.

float	devicePixelRatio () const
	Returns the ratio between physical pixels and device-independent pixels to be used for rendering.

QByteArray *	uniformData ()
	Returns a pointer to the data for the uniform (constant) buffer in the shader.

QRhiResourceUpdateBatch *	resourceUpdateBatch ()
	Returns a resource update batch to which upload and copy operatoins can be queued.

QRhi *	rhi ()
	Returns the current QRhi.

Friends
class	QSGRenderer

Detailed Description

Encapsulates the current rendering state during a call to QSGMaterialShader::updateUniformData() and the other update type of functions.

\inmodule QtQuick

Since: 5.14

The render state contains a number of accessors that the shader needs to respect in order to conform to the current state of the scene graph.

Definition at line 25 of file qsgmaterialshader.h.

Member Enumeration Documentation

◆ DirtyState

enum QSGMaterialShader::RenderState::DirtyState

\value DirtyMatrix Used to indicate that the matrix has changed and must be updated.

\value DirtyOpacity Used to indicate that the opacity has changed and must be updated.

\value DirtyCachedMaterialData Used to indicate that the cached material state has changed and must be updated.

\value DirtyAll Used to indicate that everything needs to be updated.

Enumerator
DirtyMatrix
DirtyOpacity
DirtyCachedMaterialData
DirtyAll

Definition at line 27 of file qsgmaterialshader.h.

Member Function Documentation

◆ combinedMatrix() [1/2]

QMatrix4x4 QSGMaterialShader::RenderState::combinedMatrix ( ) const

Returns the matrix combined of modelview matrix and project matrix.

Definition at line 818 of file qsgmaterialshader.cpp.

◆ combinedMatrix() [2/2]

QMatrix4x4 QSGMaterialShader::RenderState::combinedMatrix ( qsizetype index ) const

Definition at line 827 of file qsgmaterialshader.cpp.

◆ determinant()

float QSGMaterialShader::RenderState::determinant ( ) const

Returns the modelview determinant to be used for rendering.

Definition at line 809 of file qsgmaterialshader.cpp.

◆ devicePixelRatio()

float QSGMaterialShader::RenderState::devicePixelRatio ( ) const

Returns the ratio between physical pixels and device-independent pixels to be used for rendering.

Definition at line 837 of file qsgmaterialshader.cpp.

◆ deviceRect()

QRect QSGMaterialShader::RenderState::deviceRect ( ) const

Returns the device rect of the surface being rendered to.

Definition at line 902 of file qsgmaterialshader.cpp.

◆ dirtyStates()

DirtyStates QSGMaterialShader::RenderState::dirtyStates ( ) const

inline

Returns which rendering states that have changed and needs to be updated for geometry rendered with this material to conform to the current rendering state.

Definition at line 36 of file qsgmaterialshader.h.

◆ isMatrixDirty()

bool QSGMaterialShader::RenderState::isMatrixDirty ( ) const

inline

Returns true if the dirtyStates() contain the dirty matrix state, otherwise returns false.

Definition at line 38 of file qsgmaterialshader.h.

◆ isOpacityDirty()

bool QSGMaterialShader::RenderState::isOpacityDirty ( ) const

inline

Returns true if the dirtyStates() contains the dirty opacity state, otherwise returns false.

Definition at line 39 of file qsgmaterialshader.h.

◆ modelViewMatrix()

QMatrix4x4 QSGMaterialShader::RenderState::modelViewMatrix ( ) const

Returns the model view matrix.

If the material has the RequiresFullMatrix flag set, this is guaranteed to be the complete transform matrix calculated from the scenegraph.

However, if this flag is not set, the renderer may choose to alter this matrix. For example, it may pre-transform vertices on the CPU and set this matrix to identity.

In a situation such as the above, it is still possible to retrieve the actual matrix determinant by setting the RequiresDeterminant flag in the material and calling the determinant() accessor.

Definition at line 857 of file qsgmaterialshader.cpp.

◆ opacity()

float QSGMaterialShader::RenderState::opacity ( ) const

\variable QSGMaterialShader::GraphicsPipelineState::blendEnable

Since: 5.14

Enables blending.

Note: Changing this flag should be done with care, and is best avoided. Rather, materials should always use the QSGMaterial::Blend flag to indicate that they wish to use blending. Changing this value from false to true for a material that did not declare QSGMaterial::Blend can lead to unexpected visual results.

\variable QSGMaterialShader::GraphicsPipelineState::srcColor

Since: 5.14

Source blending factor, either RGB or RGBA depending on separateBlendFactors.

\variable QSGMaterialShader::GraphicsPipelineState::dstColor

Since: 5.14

Destination blending factor, either RGB or RGBA depending on separateBlendFactors.

\variable QSGMaterialShader::GraphicsPipelineState::colorWrite

Since: 5.14

Color write mask.

\variable QSGMaterialShader::GraphicsPipelineState::blendConstant

Since: 5.14

Blend constant applicable when a blending factor is set to use a constant value.

\variable QSGMaterialShader::GraphicsPipelineState::cullMode

Since: 5.14

Cull mode.

\variable QSGMaterialShader::GraphicsPipelineState::polygonMode

Since: 6.4

Polygon rasterization mode.

\variable QSGMaterialShader::GraphicsPipelineState::separateBlendFactors

Since: 6.5

Indicates that alpha blending factors are specified separately.

False by default, meaning both RGB and alpha blending factors are defined by srcColor and dstColor. When set to true, the alpha blending factors are taken from srcAlpha and dstAlpha instead, and srcColor and dstColor applies only to RGB.

\variable QSGMaterialShader::GraphicsPipelineState::srcAlpha

Since: 6.5

Source alpha blending factor.

Applies only when separateBlendFactors is set to true.

\variable QSGMaterialShader::GraphicsPipelineState::dstAlpha

Since: 6.5

Destination alpha blending factor.

Applies only when separateBlendFactors is set to true.

\variable QSGMaterialShader::GraphicsPipelineState::opColor

Since: 6.8

RGB blending operation.

\variable QSGMaterialShader::GraphicsPipelineState::opAlpha

Since: 6.8

Alpha blending operation.

Returns the accumulated opacity to be used for rendering.

Definition at line 800 of file qsgmaterialshader.cpp.

◆ projectionMatrix() [1/2]

QMatrix4x4 QSGMaterialShader::RenderState::projectionMatrix ( ) const

Returns the projection matrix.

Definition at line 866 of file qsgmaterialshader.cpp.

◆ projectionMatrix() [2/2]

QMatrix4x4 QSGMaterialShader::RenderState::projectionMatrix ( qsizetype index ) const

Definition at line 875 of file qsgmaterialshader.cpp.

◆ projectionMatrixCount()

qsizetype QSGMaterialShader::RenderState::projectionMatrixCount ( ) const

Definition at line 884 of file qsgmaterialshader.cpp.

◆ resourceUpdateBatch()

QRhiResourceUpdateBatch * QSGMaterialShader::RenderState::resourceUpdateBatch ( )

Returns a resource update batch to which upload and copy operatoins can be queued.

This is typically used by QSGMaterialShader::updateSampledImage() to enqueue texture image content updates.

Definition at line 940 of file qsgmaterialshader.cpp.

◆ rhi()

QRhi * QSGMaterialShader::RenderState::rhi ( )

Returns the current QRhi.

Definition at line 949 of file qsgmaterialshader.cpp.

◆ uniformData()

QByteArray * QSGMaterialShader::RenderState::uniformData ( )

Returns a pointer to the data for the uniform (constant) buffer in the shader.

Uniform data must only be updated from QSGMaterialShader::updateUniformData(). The return value is null in the other reimplementable functions, such as, QSGMaterialShader::updateSampledImage().

Note: It is strongly recommended to declare the uniform block with std140 in the shader, and to carefully study the standard uniform block layout as described in section 7.6.2.2 of the OpenGL specification. It is up to the QSGMaterialShader implementation to ensure data gets placed at the right location in this QByteArray, taking alignment requirements into account. Shader code translated to other shading languages is expected to use the same offsets for block members, even when the target language uses different packing rules by default.; Avoid copying from C++ POD types, such as, structs, in order to update multiple members at once, unless it has been verified that the layouts of the C++ struct and the GLSL uniform block match.

Definition at line 928 of file qsgmaterialshader.cpp.

◆ viewportRect()

QRect QSGMaterialShader::RenderState::viewportRect ( ) const

Returns the viewport rect of the surface being rendered to.

Definition at line 893 of file qsgmaterialshader.cpp.

Friends And Related Symbol Documentation

◆ QSGRenderer

friend class QSGRenderer

friend

Definition at line 58 of file qsgmaterialshader.h.

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

qtdeclarative/src/quick/scenegraph/coreapi/qsgmaterialshader.h (839716872b9d5f9300eea4d0ddc7bf0fa6168165)
qtdeclarative/src/quick/scenegraph/coreapi/qsgmaterialshader.cpp (839716872b9d5f9300eea4d0ddc7bf0fa6168165)

Public Types

Public Member Functions

Friends

Detailed Description

Member Enumeration Documentation

◆ DirtyState

Member Function Documentation

◆ combinedMatrix() [1/2]

◆ combinedMatrix() [2/2]

◆ determinant()

◆ devicePixelRatio()

◆ deviceRect()

◆ dirtyStates()

◆ isMatrixDirty()

◆ isOpacityDirty()

◆ modelViewMatrix()

◆ opacity()

◆ projectionMatrix() [1/2]

◆ projectionMatrix() [2/2]

◆ projectionMatrixCount()

◆ resourceUpdateBatch()

◆ rhi()

◆ uniformData()

◆ viewportRect()

Friends And Related Symbol Documentation

◆ QSGRenderer