Open CASCADE Technology  7.0.0
Public Types | Public Member Functions | Static Public Member Functions
Graphic3d_ShaderProgram Class Reference

This class is responsible for managing shader programs. More...

#include <Graphic3d_ShaderProgram.hxx>

Inheritance diagram for Graphic3d_ShaderProgram:
Inheritance graph
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Public Types

enum  ShaderName { ShaderName_UNKNOWN, ShaderName_Phong }
 The list of built-in GLSL programs. More...
 
- Public Types inherited from Standard_Transient
typedef void base_type
 Returns a type descriptor about this object. More...
 

Public Member Functions

 Graphic3d_ShaderProgram ()
 Creates new empty program object. More...
 
 Graphic3d_ShaderProgram (const Graphic3d_ShaderProgram::ShaderName theName)
 Creates program object from pre-defined shaders. Raises Standard_Failure exception if shader resources are unavailable. More...
 
virtual ~Graphic3d_ShaderProgram ()
 Releases resources of program object. More...
 
void Destroy () const
 Releases resources of program object. More...
 
virtual Standard_Boolean IsDone () const
 Checks if the program object is valid or not. More...
 
const TCollection_AsciiStringGetId () const
 Returns unique ID used to manage resource in graphic driver. More...
 
const TCollection_AsciiStringHeader () const
 Returns GLSL header (version code and extensions). More...
 
void SetHeader (const TCollection_AsciiString &theHeader)
 Setup GLSL header containing language version code and used extensions. Will be prepended to the very beginning of the source code. Example: More...
 
Standard_Boolean AttachShader (const Handle< Graphic3d_ShaderObject > &theShader)
 Attaches shader object to the program object. More...
 
Standard_Boolean DetachShader (const Handle< Graphic3d_ShaderObject > &theShader)
 Detaches shader object from the program object. More...
 
const Graphic3d_ShaderObjectListShaderObjects () const
 Returns list of attached shader objects. More...
 
const Graphic3d_ShaderVariableListVariables () const
 The list of currently pushed but not applied custom uniform variables. This list is automatically cleared after applying to GLSL program. More...
 
const Graphic3d_ShaderAttributeListVertexAttributes () const
 Return the list of custom vertex attributes. More...
 
void SetVertexAttributes (const Graphic3d_ShaderAttributeList &theAttributes)
 Assign the list of custom vertex attributes. Should be done before GLSL program initialization. More...
 
template<class T >
Standard_Boolean PushVariable (const TCollection_AsciiString &theName, const T &theValue)
 Pushes custom uniform variable to the program. The list of pushed variables is automatically cleared after applying to GLSL program. Thus after program recreation even unchanged uniforms should be pushed anew. More...
 
void ClearVariables ()
 Removes all custom uniform variables from the program. More...
 
Standard_Boolean PushVariableFloat (const TCollection_AsciiString &theName, const float theValue)
 Pushes float uniform. More...
 
Standard_Boolean PushVariableVec2 (const TCollection_AsciiString &theName, const Graphic3d_Vec2 &theValue)
 Pushes vec2 uniform. More...
 
Standard_Boolean PushVariableVec3 (const TCollection_AsciiString &theName, const Graphic3d_Vec3 &theValue)
 Pushes vec3 uniform. More...
 
Standard_Boolean PushVariableVec4 (const TCollection_AsciiString &theName, const Graphic3d_Vec4 &theValue)
 Pushes vec4 uniform. More...
 
Standard_Boolean PushVariableInt (const TCollection_AsciiString &theName, const int theValue)
 Pushes int uniform. More...
 
Standard_Boolean PushVariableVec2i (const TCollection_AsciiString &theName, const Graphic3d_Vec2i &theValue)
 Pushes vec2i uniform. More...
 
Standard_Boolean PushVariableVec3i (const TCollection_AsciiString &theName, const Graphic3d_Vec3i &theValue)
 Pushes vec3i uniform. More...
 
Standard_Boolean PushVariableVec4i (const TCollection_AsciiString &theName, const Graphic3d_Vec4i &theValue)
 Pushes vec4i uniform. More...
 
- Public Member Functions inherited from Standard_Transient
 Standard_Transient ()
 Empty constructor. More...
 
 Standard_Transient (const Standard_Transient &)
 Copy constructor – does nothing. More...
 
Standard_Transientoperator= (const Standard_Transient &)
 Assignment operator, needed to avoid copying reference counter. More...
 
virtual ~Standard_Transient ()
 Destructor must be virtual. More...
 
virtual void Delete () const
 Memory deallocator for transient classes. More...
 
virtual const opencascade::handle< Standard_Type > & DynamicType () const
 Returns a type descriptor about this object. More...
 
Standard_Boolean IsInstance (const opencascade::handle< Standard_Type > &theType) const
 Returns a true value if this is an instance of Type. More...
 
Standard_Boolean IsInstance (const Standard_CString theTypeName) const
 Returns a true value if this is an instance of TypeName. More...
 
Standard_Boolean IsKind (const opencascade::handle< Standard_Type > &theType) const
 Returns true if this is an instance of Type or an instance of any class that inherits from Type. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...
 
Standard_Boolean IsKind (const Standard_CString theTypeName) const
 Returns true if this is an instance of TypeName or an instance of any class that inherits from TypeName. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...
 
Standard_TransientThis () const
 Returns non-const pointer to this object (like const_cast). For protection against creating handle to objects allocated in stack or call from constructor, it will raise exception Standard_ProgramError if reference counter is zero. More...
 
Standard_Integer GetRefCount () const
 Get the reference counter of this object. More...
 
void IncrementRefCounter () const
 Increments the reference counter of this object. More...
 
Standard_Integer DecrementRefCounter () const
 Decrements the reference counter of this object; returns the decremented value. More...
 

Static Public Member Functions

static const TCollection_AsciiStringShadersFolder ()
 The path to GLSL programs determined from CSF_ShadersDirectory or CASROOT environment variables. More...
 
- Static Public Member Functions inherited from Standard_Transient
static const char * get_type_name ()
 Returns a type descriptor about this object. More...
 
static const opencascade::handle< Standard_Type > & get_type_descriptor ()
 Returns type descriptor of Standard_Transient class. More...
 

Detailed Description

This class is responsible for managing shader programs.

Member Enumeration Documentation

The list of built-in GLSL programs.

Enumerator
ShaderName_UNKNOWN 

undefined program

ShaderName_Phong 

per-pixel lighting (Phong shading)

Constructor & Destructor Documentation

Graphic3d_ShaderProgram::Graphic3d_ShaderProgram ( )

Creates new empty program object.

Graphic3d_ShaderProgram::Graphic3d_ShaderProgram ( const Graphic3d_ShaderProgram::ShaderName  theName)

Creates program object from pre-defined shaders. Raises Standard_Failure exception if shader resources are unavailable.

virtual Graphic3d_ShaderProgram::~Graphic3d_ShaderProgram ( )
virtual

Releases resources of program object.

Member Function Documentation

Standard_Boolean Graphic3d_ShaderProgram::AttachShader ( const Handle< Graphic3d_ShaderObject > &  theShader)

Attaches shader object to the program object.

void Graphic3d_ShaderProgram::ClearVariables ( )

Removes all custom uniform variables from the program.

void Graphic3d_ShaderProgram::Destroy ( ) const

Releases resources of program object.

Standard_Boolean Graphic3d_ShaderProgram::DetachShader ( const Handle< Graphic3d_ShaderObject > &  theShader)

Detaches shader object from the program object.

const TCollection_AsciiString& Graphic3d_ShaderProgram::GetId ( ) const
inline

Returns unique ID used to manage resource in graphic driver.

const TCollection_AsciiString& Graphic3d_ShaderProgram::Header ( ) const
inline

Returns GLSL header (version code and extensions).

virtual Standard_Boolean Graphic3d_ShaderProgram::IsDone ( ) const
virtual

Checks if the program object is valid or not.

template<class T >
Standard_Boolean Graphic3d_ShaderProgram::PushVariable ( const TCollection_AsciiString theName,
const T &  theValue 
)
inline

Pushes custom uniform variable to the program. The list of pushed variables is automatically cleared after applying to GLSL program. Thus after program recreation even unchanged uniforms should be pushed anew.

Standard_Boolean Graphic3d_ShaderProgram::PushVariableFloat ( const TCollection_AsciiString theName,
const float  theValue 
)
inline

Pushes float uniform.

Standard_Boolean Graphic3d_ShaderProgram::PushVariableInt ( const TCollection_AsciiString theName,
const int  theValue 
)
inline

Pushes int uniform.

Standard_Boolean Graphic3d_ShaderProgram::PushVariableVec2 ( const TCollection_AsciiString theName,
const Graphic3d_Vec2 theValue 
)
inline

Pushes vec2 uniform.

Standard_Boolean Graphic3d_ShaderProgram::PushVariableVec2i ( const TCollection_AsciiString theName,
const Graphic3d_Vec2i theValue 
)
inline

Pushes vec2i uniform.

Standard_Boolean Graphic3d_ShaderProgram::PushVariableVec3 ( const TCollection_AsciiString theName,
const Graphic3d_Vec3 theValue 
)
inline

Pushes vec3 uniform.

Standard_Boolean Graphic3d_ShaderProgram::PushVariableVec3i ( const TCollection_AsciiString theName,
const Graphic3d_Vec3i theValue 
)
inline

Pushes vec3i uniform.

Standard_Boolean Graphic3d_ShaderProgram::PushVariableVec4 ( const TCollection_AsciiString theName,
const Graphic3d_Vec4 theValue 
)
inline

Pushes vec4 uniform.

Standard_Boolean Graphic3d_ShaderProgram::PushVariableVec4i ( const TCollection_AsciiString theName,
const Graphic3d_Vec4i theValue 
)
inline

Pushes vec4i uniform.

void Graphic3d_ShaderProgram::SetHeader ( const TCollection_AsciiString theHeader)
inline

Setup GLSL header containing language version code and used extensions. Will be prepended to the very beginning of the source code. Example:

#version 300 es
#extension GL_ARB_bindless_texture : require
void Graphic3d_ShaderProgram::SetVertexAttributes ( const Graphic3d_ShaderAttributeList theAttributes)

Assign the list of custom vertex attributes. Should be done before GLSL program initialization.

const Graphic3d_ShaderObjectList& Graphic3d_ShaderProgram::ShaderObjects ( ) const
inline

Returns list of attached shader objects.

static const TCollection_AsciiString& Graphic3d_ShaderProgram::ShadersFolder ( )
static

The path to GLSL programs determined from CSF_ShadersDirectory or CASROOT environment variables.

Returns
the root folder with default GLSL programs.
const Graphic3d_ShaderVariableList& Graphic3d_ShaderProgram::Variables ( ) const
inline

The list of currently pushed but not applied custom uniform variables. This list is automatically cleared after applying to GLSL program.

const Graphic3d_ShaderAttributeList& Graphic3d_ShaderProgram::VertexAttributes ( ) const
inline

Return the list of custom vertex attributes.


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