内容

• 公共类型
• 特性
• 公共函数
• 公共槽
• 信号
• 静态公共成员
• 重实现保护函数
• 详细描述

QShaderProgram Class

class Qt3DRender ::QShaderProgram

Encapsulates a Shader Program. 更多...

头：	#include <QShaderProgram>
qmake:	QT += 3drender
Since:	Qt 5.5
实例化：	ShaderProgram
继承：	Qt3DCore::QNode

该类在 Qt 5.5 引入。

• 所有成员列表，包括继承成员

公共类型

enum	Format { GLSL, SPIRV }
enum	ShaderType { Vertex, Fragment, TessellationControl, TessellationEvaluation, Geometry, Compute }
enum	Status { NotReady, Ready, Error }

特性

computeShaderCode : QByteArray format : Format fragmentShaderCode : QByteArray geometryShaderCode : QByteArray log : const QString

status : const Status tessellationControlShaderCode : QByteArray tessellationEvaluationShaderCode : QByteArray vertexShaderCode : QByteArray

公共函数

QByteArray	computeShaderCode () const
Qt3DRender::QShaderProgram::Format	format () const
QByteArray	fragmentShaderCode () const
QByteArray	geometryShaderCode () const
QString	log () const
void	setFormat (Qt3DRender::QShaderProgram::Format format )
void	setShaderCode (Qt3DRender::QShaderProgram::ShaderType type , const QByteArray & shaderCode )
QByteArray	shaderCode (Qt3DRender::QShaderProgram::ShaderType type ) const
Qt3DRender::QShaderProgram::Status	status () const
QByteArray	tessellationControlShaderCode () const
QByteArray	tessellationEvaluationShaderCode () const
QByteArray	vertexShaderCode () const

公共槽

void	setComputeShaderCode (const QByteArray & computeShaderCode )
void	setFragmentShaderCode (const QByteArray & fragmentShaderCode )
void	setGeometryShaderCode (const QByteArray & geometryShaderCode )
void	setTessellationControlShaderCode (const QByteArray & tessellationControlShaderCode )
void	setTessellationEvaluationShaderCode (const QByteArray & tessellationEvaluationShaderCode )
void	setVertexShaderCode (const QByteArray & vertexShaderCode )

信号

void	computeShaderCodeChanged (const QByteArray & computeShaderCode )
void	formatChanged (Qt3DRender::QShaderProgram::Format format )
void	fragmentShaderCodeChanged (const QByteArray & fragmentShaderCode )
void	geometryShaderCodeChanged (const QByteArray & geometryShaderCode )
void	logChanged (const QString & log )
void	statusChanged (Qt3DRender::QShaderProgram::Status status )
void	tessellationControlShaderCodeChanged (const QByteArray & tessellationControlShaderCode )
void	tessellationEvaluationShaderCodeChanged (const QByteArray & tessellationEvaluationShaderCode )
void	vertexShaderCodeChanged (const QByteArray & vertexShaderCode )

静态公共成员

QByteArray

loadSource (const QUrl & sourceUrl )

重实现保护函数

virtual void

sceneChangeEvent (const Qt3DCore::QSceneChangePtr & change ) override

详细描述

A shader program consists of several different shaders, such as vertex and fragment shaders.

Qt3D will automatically populate a set of default uniforms if they are encountered during the shader instrospection phase.

Default Uniform	Associated Qt3D Parameter name		GLSL declaration
ModelMatrix	modelMatrix		uniform mat4 modelMatrix;
ViewMatrix	viewMatrix		uniform mat4 viewMatrix;
ProjectionMatrix	projectionMatrix		uniform mat4 projectionMatrix;
ModelViewMatrix	modelView		uniform mat4 modelView;
ViewProjectionMatrix	viewProjectionMatrix		uniform mat4 viewProjectionMatrix;
ModelViewProjectionMatrix	modelViewProjection mvp		uniform mat4 modelViewProjection; uniform mat4 mvp;
InverseModelMatrix	inverseModelMatrix		uniform mat4 inverseModelMatrix;
InverseViewMatrix	inverseViewMatrix		uniform mat4 inverseViewMatrix;
InverseProjectionMatrix	inverseProjectionMatrix		uniform mat4 inverseProjectionMatrix;
InverseModelViewMatrix	inverseModelView		uniform mat4 inverseModelView;
InverseViewProjectionMatrix	inverseViewProjectionMatrix		uniform mat4 inverseViewProjectionMatrix;
InverseModelViewProjectionMatrix	inverseModelViewProjection		uniform mat4 inverseModelViewProjection;
ModelNormalMatrix	modelNormalMatrix		uniform mat3 modelNormalMatrix;
ModelViewNormalMatrix	modelViewNormal		uniform mat3 modelViewNormal;
ViewportMatrix	viewportMatrix		uniform mat4 viewportMatrix;
InverseViewportMatrix	inverseViewportMatrix		uniform mat4 inverseViewportMatrix;
AspectRatio (surface width / surface height)	aspectRatio		uniform float aspectRatio;
Exposure	exposure		uniform float exposure;
Gamma	gamma		uniform float gamma;
Time (in nano seconds)	time		uniform float time;
EyePosition	eyePosition		uniform vec3 eyePosition;
SkinningPalette	skinningPalette[0]		const int maxJoints = 100; uniform mat4 skinningPalette[maxJoints];

成员类型文档编制

enum QShaderProgram:: Format

This enum identifies the format of the shader code used.

常量	值	描述
Qt3DRender::QShaderProgram::GLSL	0	OpenGL
Qt3DRender::QShaderProgram::SPIRV	1	Vulkan, OpenGL 5

该枚举在 Qt 5.15 引入或被修改。

enum QShaderProgram:: ShaderType

This enum identifies the type of shader used.

常量	值	描述
Qt3DRender::QShaderProgram::Vertex	0	Vertex shader
Qt3DRender::QShaderProgram::Fragment	1	Fragment shader
Qt3DRender::QShaderProgram::TessellationControl	2	Tesselation control shader
Qt3DRender::QShaderProgram::TessellationEvaluation	3	Tesselation evaluation shader
Qt3DRender::QShaderProgram::Geometry	4	Geometry shader
Qt3DRender::QShaderProgram::Compute	5	Compute shader

enum QShaderProgram:: Status

This enum identifies the status of shader used.

常量	值	描述
Qt3DRender::QShaderProgram::NotReady	0	The shader hasn't been compiled and linked yet
Qt3DRender::QShaderProgram::Ready	1	The shader was successfully compiled
Qt3DRender::QShaderProgram::Error	2	An error occurred while compiling the shader

特性文档编制

computeShaderCode : QByteArray

Holds the compute shader code used by this shader program.

访问函数：

QByteArray	computeShaderCode () const
void	setComputeShaderCode (const QByteArray & computeShaderCode )

通知程序信号：

void	computeShaderCodeChanged (const QByteArray & computeShaderCode )

format : Format

Holds the format of the code provided on the ShaderProgram 。默认为 ShaderProgram .GLSL

该特性在 Qt 5.15 引入。

访问函数：

Qt3DRender::QShaderProgram::Format	format () const
void	setFormat (Qt3DRender::QShaderProgram::Format format )

通知程序信号：

void	formatChanged (Qt3DRender::QShaderProgram::Format format )

fragmentShaderCode : QByteArray

Holds the fragment shader code used by this shader program.

访问函数：

QByteArray	fragmentShaderCode () const
void	setFragmentShaderCode (const QByteArray & fragmentShaderCode )

通知程序信号：

void	fragmentShaderCodeChanged (const QByteArray & fragmentShaderCode )

geometryShaderCode : QByteArray

Holds the geometry shader code used by this shader program.

访问函数：

QByteArray	geometryShaderCode () const
void	setGeometryShaderCode (const QByteArray & geometryShaderCode )

通知程序信号：

void	geometryShaderCodeChanged (const QByteArray & geometryShaderCode )

log : const QString

Holds the log of the current shader program. This is useful to diagnose a compilation failure of the shader program.

访问函数：

QString

log () const

通知程序信号：

void	logChanged (const QString & log )

status : const Status

Holds the status of the current shader program.

访问函数：

Qt3DRender::QShaderProgram::Status

status () const

通知程序信号：

void	statusChanged (Qt3DRender::QShaderProgram::Status status )

tessellationControlShaderCode : QByteArray

Holds the tesselation control shader code used by this shader program.

访问函数：

QByteArray	tessellationControlShaderCode () const
void	setTessellationControlShaderCode (const QByteArray & tessellationControlShaderCode )

通知程序信号：

void	tessellationControlShaderCodeChanged (const QByteArray & tessellationControlShaderCode )

tessellationEvaluationShaderCode : QByteArray

Holds the tesselation evaluation shader code used by this shader program.

访问函数：

QByteArray	tessellationEvaluationShaderCode () const
void	setTessellationEvaluationShaderCode (const QByteArray & tessellationEvaluationShaderCode )

通知程序信号：

void	tessellationEvaluationShaderCodeChanged (const QByteArray & tessellationEvaluationShaderCode )

vertexShaderCode : QByteArray

Holds the vertex shader code used by this shader program.

访问函数：

QByteArray	vertexShaderCode () const
void	setVertexShaderCode (const QByteArray & vertexShaderCode )

通知程序信号：

void	vertexShaderCodeChanged (const QByteArray & vertexShaderCode )

成员函数文档编制

[static] QByteArray QShaderProgram:: loadSource (const QUrl & sourceUrl )

Returns the shader code loaded from sourceUrl .

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

[override virtual protected] void QShaderProgram:: sceneChangeEvent (const Qt3DCore::QSceneChangePtr & change )

重实现： QNode::sceneChangeEvent (const Qt3DCore::QSceneChangePtr &change).

Posts a scene change with parameter change .

void QShaderProgram:: setShaderCode ( Qt3DRender::QShaderProgram::ShaderType type , const QByteArray & shaderCode )

Sets the shader code for type of shader to the shaderCode .

另请参阅 shaderCode ().

QByteArray QShaderProgram:: shaderCode ( Qt3DRender::QShaderProgram::ShaderType type ) const

Returns the shader code for type .

另请参阅 setShaderCode ().

Qt3DRender::QShaderProgram::Status QShaderProgram:: status () const

Returns the status of the current shader program.

注意： Getter 函数对于特性 status。