Open CASCADE Technology  7.4.1.dev
Public Member Functions
OpenGl_IndexBuffer Class Reference

Index buffer is just a VBO with special target (GL_ELEMENT_ARRAY_BUFFER). More...

#include <OpenGl_IndexBuffer.hxx>

Inheritance diagram for OpenGl_IndexBuffer:
Inheritance graph
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Public Member Functions

 OpenGl_IndexBuffer ()
 
virtual GLenum GetTarget () const override
 
virtual void DumpJson (Standard_OStream &theOStream, Standard_Integer theDepth=-1) const override
 Dumps the content of me into the stream. More...
 
- Public Member Functions inherited from OpenGl_VertexBuffer
 OpenGl_VertexBuffer ()
 Create uninitialized VBO. More...
 
virtual ~OpenGl_VertexBuffer ()
 Destroy object. More...
 
virtual bool IsVirtual () const
 Return TRUE if this is a virtual (for backward compatibility) VBO object. More...
 
bool IsValid () const
 
GLuint GetComponentsNb () const
 
GLsizei GetElemsNb () const
 
void SetElemsNb (GLsizei theNbElems)
 Overrides the number of vertex attributes / number of vertexes. It is up to user specifying this number correct (e.g. below initial value)! More...
 
GLenum GetDataType () const
 
GLubyte * GetDataOffset () const
 
virtual bool Create (const Handle< OpenGl_Context > &theGlCtx)
 Creates VBO name (id) if not yet generated. Data should be initialized by another method. More...
 
virtual void Release (OpenGl_Context *theGlCtx) override
 Destroy object - will release GPU memory if any. More...
 
virtual void Bind (const Handle< OpenGl_Context > &theGlCtx) const
 Bind this VBO. More...
 
virtual void Unbind (const Handle< OpenGl_Context > &theGlCtx) const
 Unbind this VBO. More...
 
bool Init (const Handle< OpenGl_Context > &theGlCtx, const GLuint theComponentsNb, const GLsizei theElemsNb, const GLfloat *theData)
 Notice that VBO will be unbound after this call. More...
 
bool Init (const Handle< OpenGl_Context > &theGlCtx, const GLuint theComponentsNb, const GLsizei theElemsNb, const GLuint *theData)
 Notice that VBO will be unbound after this call. More...
 
bool Init (const Handle< OpenGl_Context > &theGlCtx, const GLuint theComponentsNb, const GLsizei theElemsNb, const GLushort *theData)
 Notice that VBO will be unbound after this call. More...
 
bool Init (const Handle< OpenGl_Context > &theGlCtx, const GLuint theComponentsNb, const GLsizei theElemsNb, const GLubyte *theData)
 Notice that VBO will be unbound after this call. More...
 
bool SubData (const Handle< OpenGl_Context > &theGlCtx, const GLsizei theElemFrom, const GLsizei theElemsNb, const GLfloat *theData)
 Notice that VBO will be unbound after this call. Function replaces portion of data within this VBO using glBufferSubData(). The VBO should be initialized before call. More...
 
bool GetSubData (const Handle< OpenGl_Context > &theGlCtx, const GLsizei theElemFrom, const GLsizei theElemsNb, GLfloat *theData)
 Read back buffer sub-range. Notice that VBO will be unbound after this call. Function reads portion of data from this VBO using glGetBufferSubData(). More...
 
bool SubData (const Handle< OpenGl_Context > &theGlCtx, const GLsizei theElemFrom, const GLsizei theElemsNb, const GLuint *theData)
 Notice that VBO will be unbound after this call. Function replaces portion of data within this VBO using glBufferSubData(). The VBO should be initialized before call. More...
 
bool GetSubData (const Handle< OpenGl_Context > &theGlCtx, const GLsizei theElemFrom, const GLsizei theElemsNb, GLuint *theData)
 Read back buffer sub-range. Notice that VBO will be unbound after this call. Function reads portion of data from this VBO using glGetBufferSubData(). More...
 
bool SubData (const Handle< OpenGl_Context > &theGlCtx, const GLsizei theElemFrom, const GLsizei theElemsNb, const GLushort *theData)
 Notice that VBO will be unbound after this call. Function replaces portion of data within this VBO using glBufferSubData(). The VBO should be initialized before call. More...
 
bool GetSubData (const Handle< OpenGl_Context > &theGlCtx, const GLsizei theElemFrom, const GLsizei theElemsNb, GLushort *theData)
 Read back buffer sub-range. Notice that VBO will be unbound after this call. Function reads portion of data from this VBO using glGetBufferSubData(). More...
 
bool SubData (const Handle< OpenGl_Context > &theGlCtx, const GLsizei theElemFrom, const GLsizei theElemsNb, const GLubyte *theData)
 Notice that VBO will be unbound after this call. Function replaces portion of data within this VBO using glBufferSubData(). The VBO should be initialized before call. More...
 
bool GetSubData (const Handle< OpenGl_Context > &theGlCtx, const GLsizei theElemFrom, const GLsizei theElemsNb, GLubyte *theData)
 Read back buffer sub-range. Notice that VBO will be unbound after this call. Function reads portion of data from this VBO using glGetBufferSubData(). More...
 
void BindVertexAttrib (const Handle< OpenGl_Context > &theGlCtx, const GLuint theAttribLoc) const
 Bind this VBO to active GLSL program. More...
 
void UnbindVertexAttrib (const Handle< OpenGl_Context > &theGlCtx, const GLuint theAttribLoc) const
 Unbind any VBO from active GLSL program. More...
 
void BindAttribute (const Handle< OpenGl_Context > &theCtx, const Graphic3d_TypeOfAttribute theMode) const
 Bind this VBO and enable specified attribute in OpenGl_Context::ActiveProgram() or FFP. More...
 
void UnbindAttribute (const Handle< OpenGl_Context > &theCtx, const Graphic3d_TypeOfAttribute theMode) const
 Unbind this VBO and disable specified attribute in OpenGl_Context::ActiveProgram() or FFP. More...
 
virtual bool HasColorAttribute () const
 
virtual bool HasNormalAttribute () const
 
virtual void BindAllAttributes (const Handle< OpenGl_Context > &theGlCtx) const
 Bind all vertex attributes to active program OpenGl_Context::ActiveProgram() or for FFP. Default implementation does nothing. More...
 
virtual void BindPositionAttribute (const Handle< OpenGl_Context > &theGlCtx) const
 Bind vertex position attribute only. Default implementation does nothing. More...
 
virtual void UnbindAllAttributes (const Handle< OpenGl_Context > &theGlCtx) const
 Unbind all vertex attributes. Default implementation does nothing. More...
 
virtual Standard_Size EstimatedDataSize () const override
 Returns estimated GPU memory usage for holding data without considering overheads and allocation alignment rules. More...
 
virtual bool init (const Handle< OpenGl_Context > &theGlCtx, const GLuint theComponentsNb, const GLsizei theElemsNb, const void *theData, const GLenum theDataType, const GLsizei theStride)
 Initialize buffer with new data. More...
 
bool init (const Handle< OpenGl_Context > &theGlCtx, const GLuint theComponentsNb, const GLsizei theElemsNb, const void *theData, const GLenum theDataType)
 Initialize buffer with new data. More...
 
virtual bool subData (const Handle< OpenGl_Context > &theGlCtx, const GLsizei theElemFrom, const GLsizei theElemsNb, const void *theData, const GLenum theDataType)
 Update part of the buffer with new data. More...
 
virtual bool getSubData (const Handle< OpenGl_Context > &theGlCtx, const GLsizei theElemFrom, const GLsizei theElemsNb, void *theData, const GLenum theDataType)
 Read back buffer sub-range. More...
 
- Public Member Functions inherited from OpenGl_Resource
 OpenGl_Resource ()
 Empty constructor. More...
 
virtual ~OpenGl_Resource ()
 Destructor. Inheritors should call Clean (NULL) within it. 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...
 

Additional Inherited Members

- Public Types inherited from Standard_Transient
typedef void base_type
 Returns a type descriptor about this object. More...
 
- Static Public Member Functions inherited from OpenGl_VertexBuffer
static size_t sizeOfGlType (const GLenum theType)
 
static void bindAttribute (const Handle< OpenGl_Context > &theGlCtx, const Graphic3d_TypeOfAttribute theMode, const GLint theNbComp, const GLenum theDataType, const GLsizei theStride, const GLvoid *theOffset)
 Setup array pointer - either for active GLSL program OpenGl_Context::ActiveProgram() or for FFP using bindFixed() when no program bound. More...
 
static void unbindAttribute (const Handle< OpenGl_Context > &theGlCtx, const Graphic3d_TypeOfAttribute theMode)
 Disable GLSL array pointer - either for active GLSL program OpenGl_Context::ActiveProgram() or for FFP using unbindFixed() when no program bound. 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...
 
- Static Public Attributes inherited from OpenGl_VertexBuffer
static const GLuint NO_BUFFER = 0
 Helpful constants. More...
 
- Protected Attributes inherited from OpenGl_VertexBuffer
GLubyte * myOffset
 offset to data More...
 
GLuint myBufferId
 VBO name (index) More...
 
GLuint myComponentsNb
 Number of components per generic vertex attribute, must be 1, 2, 3, or 4. More...
 
GLsizei myElemsNb
 Number of vertex attributes / number of vertices. More...
 
GLenum myDataType
 Data type (GL_FLOAT, GL_UNSIGNED_INT, GL_UNSIGNED_BYTE etc.) More...
 

Detailed Description

Index buffer is just a VBO with special target (GL_ELEMENT_ARRAY_BUFFER).

Constructor & Destructor Documentation

◆ OpenGl_IndexBuffer()

OpenGl_IndexBuffer::OpenGl_IndexBuffer ( )

Member Function Documentation

◆ DumpJson()

virtual void OpenGl_IndexBuffer::DumpJson ( Standard_OStream theOStream,
Standard_Integer  theDepth = -1 
) const
overridevirtual

Dumps the content of me into the stream.

Reimplemented from OpenGl_VertexBuffer.

◆ GetTarget()

virtual GLenum OpenGl_IndexBuffer::GetTarget ( ) const
overridevirtual

Reimplemented from OpenGl_VertexBuffer.


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