QShaderProgramBuilder Class

class Qt3DRender::QShaderProgramBuilder

Generates a Shader Program content from loaded graphs. More...

Header: #include <QShaderProgramBuilder>
qmake: QT += 3drender
Since: Qt 5.10
Instantiated By: ShaderProgramBuilder
Inherits: Qt3DCore::QNode

This class was introduced in Qt 5.10.

Properties

Public Functions

QByteArray computeShaderCode() const
QUrl computeShaderGraph() const
QStringList enabledLayers() const
QByteArray fragmentShaderCode() const
QUrl fragmentShaderGraph() const
QByteArray geometryShaderCode() const
QUrl geometryShaderGraph() const
Qt3DRender::QShaderProgram *shaderProgram() const
QByteArray tessellationControlShaderCode() const
QUrl tessellationControlShaderGraph() const
QByteArray tessellationEvaluationShaderCode() const
QUrl tessellationEvaluationShaderGraph() const
QByteArray vertexShaderCode() const
QUrl vertexShaderGraph() const

Public Slots

void setComputeShaderGraph(const QUrl &computeShaderGraph)
void setEnabledLayers(const QStringList &layers)
void setFragmentShaderGraph(const QUrl &fragmentShaderGraph)
void setGeometryShaderGraph(const QUrl &geometryShaderGraph)
void setShaderProgram(Qt3DRender::QShaderProgram *program)
void setTessellationControlShaderGraph(const QUrl &tessellationControlShaderGraph)
void setTessellationEvaluationShaderGraph(const QUrl &tessellationEvaluationShaderGraph)
void setVertexShaderGraph(const QUrl &vertexShaderGraph)

Signals

void computeShaderCodeChanged(const QByteArray &computeShaderCode)
void computeShaderGraphChanged(const QUrl &computeShaderGraph)
void enabledLayersChanged(const QStringList &layers)
void fragmentShaderCodeChanged(const QByteArray &fragmentShaderCode)
void fragmentShaderGraphChanged(const QUrl &fragmentShaderGraph)
void geometryShaderCodeChanged(const QByteArray &geometryShaderCode)
void geometryShaderGraphChanged(const QUrl &geometryShaderGraph)
void shaderProgramChanged(Qt3DRender::QShaderProgram *shaderProgram)
void tessellationControlShaderCodeChanged(const QByteArray &tessellationControlShaderCode)
void tessellationControlShaderGraphChanged(const QUrl &tessellationControlShaderGraph)
void tessellationEvaluationShaderCodeChanged(const QByteArray &tessellationEvaluationShaderCode)
void tessellationEvaluationShaderGraphChanged(const QUrl &tessellationEvaluationShaderGraph)
void vertexShaderCodeChanged(const QByteArray &vertexShaderCode)
void vertexShaderGraphChanged(const QUrl &vertexShaderGraph)

Detailed Description

A shader program builder consists of several different shader graphs used to generate shader code.

A cache of generated shader code is maintained. Generated shaders are by defaults saved in QStandardPaths::writableLocation(QStandardPaths::TempLocation)). This path can be overridden by setting environment variable QT3D_WRITABLE_CACHE_PATH to a valid writable path.

The use of the cache can be disabled by setting environment variable QT3D_DISABLE_SHADER_CACHE.

In most cases, changes made to a graph are detected by Qt 3D and a new cache entry will be generated. One case were this will not happen is when code snippets included by a graphs are changed. To work around that, clearing the cache directory or setting environment variable QT3D_REBUILD_SHADER_CACHE can be used to force shader code to be generated again.

Property Documentation

computeShaderCode : const QByteArray

Holds the generate compute shader code.

This property was introduced in Qt 5.13.

Access functions:

QByteArray computeShaderCode() const

Notifier signal:

void computeShaderCodeChanged(const QByteArray &computeShaderCode)

computeShaderGraph : QUrl

Holds the URL to the compute shader graph used by this shader program builder.

Access functions:

QUrl computeShaderGraph() const
void setComputeShaderGraph(const QUrl &computeShaderGraph)

Notifier signal:

void computeShaderGraphChanged(const QUrl &computeShaderGraph)

enabledLayers : QStringList

Holds the list of layers this builder will activate on the shader graphs during code generation.

Access functions:

QStringList enabledLayers() const
void setEnabledLayers(const QStringList &layers)

Notifier signal:

void enabledLayersChanged(const QStringList &layers)

fragmentShaderCode : const QByteArray

Holds the generate fragment shader code.

This property was introduced in Qt 5.13.

Access functions:

QByteArray fragmentShaderCode() const

Notifier signal:

void fragmentShaderCodeChanged(const QByteArray &fragmentShaderCode)

fragmentShaderGraph : QUrl

Holds the URL to the fragment shader graph used by this shader program builder.

Access functions:

QUrl fragmentShaderGraph() const
void setFragmentShaderGraph(const QUrl &fragmentShaderGraph)

Notifier signal:

void fragmentShaderGraphChanged(const QUrl &fragmentShaderGraph)

geometryShaderCode : const QByteArray

Holds the generate geometry shader code.

This property was introduced in Qt 5.13.

Access functions:

QByteArray geometryShaderCode() const

Notifier signal:

void geometryShaderCodeChanged(const QByteArray &geometryShaderCode)

geometryShaderGraph : QUrl

Holds the URL to the geometry shader graph used by this shader program builder.

Access functions:

QUrl geometryShaderGraph() const
void setGeometryShaderGraph(const QUrl &geometryShaderGraph)

Notifier signal:

void geometryShaderGraphChanged(const QUrl &geometryShaderGraph)

shaderProgram : Qt3DRender::QShaderProgram*

Holds the shader program on which this builder generates code.

Access functions:

Qt3DRender::QShaderProgram *shaderProgram() const
void setShaderProgram(Qt3DRender::QShaderProgram *program)

Notifier signal:

void shaderProgramChanged(Qt3DRender::QShaderProgram *shaderProgram)

tessellationControlShaderCode : const QByteArray

Holds the generate tessellation control shader code.

This property was introduced in Qt 5.13.

Access functions:

QByteArray tessellationControlShaderCode() const

Notifier signal:

void tessellationControlShaderCodeChanged(const QByteArray &tessellationControlShaderCode)

tessellationControlShaderGraph : QUrl

Holds the URL to the tesselation control shader graph used by this shader program builder.

Access functions:

QUrl tessellationControlShaderGraph() const
void setTessellationControlShaderGraph(const QUrl &tessellationControlShaderGraph)

Notifier signal:

void tessellationControlShaderGraphChanged(const QUrl &tessellationControlShaderGraph)

tessellationEvaluationShaderCode : const QByteArray

Holds the generate tessellation evaluation shader code.

This property was introduced in Qt 5.13.

Access functions:

QByteArray tessellationEvaluationShaderCode() const

Notifier signal:

void tessellationEvaluationShaderCodeChanged(const QByteArray &tessellationEvaluationShaderCode)

tessellationEvaluationShaderGraph : QUrl

Holds the URL to the tesselation evaluation shader graph used by this shader program builder.

Access functions:

QUrl tessellationEvaluationShaderGraph() const
void setTessellationEvaluationShaderGraph(const QUrl &tessellationEvaluationShaderGraph)

Notifier signal:

void tessellationEvaluationShaderGraphChanged(const QUrl &tessellationEvaluationShaderGraph)

vertexShaderCode : const QByteArray

Holds the generate vertex shader code.

This property was introduced in Qt 5.13.

Access functions:

QByteArray vertexShaderCode() const

Notifier signal:

void vertexShaderCodeChanged(const QByteArray &vertexShaderCode)

vertexShaderGraph : QUrl

Holds the URL to the vertex shader graph used by this shader program builder.

Access functions:

QUrl vertexShaderGraph() const
void setVertexShaderGraph(const QUrl &vertexShaderGraph)

Notifier signal:

void vertexShaderGraphChanged(const QUrl &vertexShaderGraph)

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