Class implements FrameBuffer Object (FBO) resource intended for off-screen rendering. More...

#include <OpenGl_FrameBuffer.hxx>

Inheritance diagram for OpenGl_FrameBuffer:

Public Member Functions
	OpenGl_FrameBuffer (GLint theTextureFormat=GL_RGBA8)
	Empty constructor. More...

virtual	~OpenGl_FrameBuffer ()
	Destructor. More...

virtual void	Release (const OpenGl_Context *theGlCtx)
	Destroy object - will release GPU memory if any. More...

GLsizei	GetSizeX () const
	Texture width. More...

GLsizei	GetSizeY () const
	Texture height. More...

GLsizei	GetVPSizeX () const
	Viewport width. More...

GLsizei	GetVPSizeY () const
	Viewport height. More...

Standard_Boolean	IsValid () const
	Returns true if current object was initialized. More...

Standard_Boolean	Init (const Handle< OpenGl_Context > &theGlCtx, const GLsizei theViewportSizeX, const GLsizei theViewportSizeY, const GLboolean toForcePowerOfTwo=GL_FALSE)
	Notice! Obsolete hardware (GeForce FX etc) doesn't support rectangular textures! There are 3 possible results if you are trying to create non power-of-two FBO on these cards: 1) FBO creation will fail, current implementation will try to generate compatible FBO; 2) FBO rendering will be done in software mode (ForceWare 'hack'); 3) FBO rendering will be incorrect (some obsolete Catalyst drivers). More...

void	SetupViewport (const Handle< OpenGl_Context > &theGlCtx)
	Setup viewport to render into FBO. More...

void	ChangeViewport (const GLsizei theVPSizeX, const GLsizei theVPSizeY)
	Override viewport settings. More...

void	BindBuffer (const Handle< OpenGl_Context > &theGlCtx)
	Bind frame buffer (to render into the texture). More...

void	UnbindBuffer (const Handle< OpenGl_Context > &theGlCtx)
	Unbind frame buffer. More...

void	BindTexture (const Handle< OpenGl_Context > &theGlCtx)
	Bind the texture. More...

void	UnbindTexture (const Handle< OpenGl_Context > &theGlCtx)
	Unbind the texture. 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_Transient &	operator= (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 void	ShallowDump (Standard_OStream &) const

virtual const Handle_Standard_Type &	DynamicType () const
	Returns a type information object about this object. More...

Standard_Boolean	IsInstance (const 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 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...

virtual Handle_Standard_Transient	This () const
	Returns a Handle which references this object. Must never be called to objects created in stack. More...

Standard_Integer	GetRefCount () const
	Get the reference counter of this object. More...

Static Public Attributes
static const GLuint	NO_TEXTURE = 0
	Helpful constants. More...

static const GLuint	NO_FRAMEBUFFER = 0

static const GLuint	NO_RENDERBUFFER = 0

Detailed Description

Class implements FrameBuffer Object (FBO) resource intended for off-screen rendering.

Constructor & Destructor Documentation

OpenGl_FrameBuffer::OpenGl_FrameBuffer ( GLint theTextureFormat = GL_RGBA8 )

Empty constructor.

virtual OpenGl_FrameBuffer::~OpenGl_FrameBuffer ( )

virtual

Destructor.

Member Function Documentation

void OpenGl_FrameBuffer::BindBuffer ( const Handle< OpenGl_Context > & theGlCtx )

Bind frame buffer (to render into the texture).

void OpenGl_FrameBuffer::BindTexture ( const Handle< OpenGl_Context > & theGlCtx )

Bind the texture.

void OpenGl_FrameBuffer::ChangeViewport	(	const GLsizei	theVPSizeX,
		const GLsizei	theVPSizeY
	)

Override viewport settings.

GLsizei OpenGl_FrameBuffer::GetSizeX ( ) const

inline

Texture width.

GLsizei OpenGl_FrameBuffer::GetSizeY ( ) const

inline

Texture height.

GLsizei OpenGl_FrameBuffer::GetVPSizeX ( ) const

inline

Viewport width.

GLsizei OpenGl_FrameBuffer::GetVPSizeY ( ) const

inline

Viewport height.

Standard_Boolean OpenGl_FrameBuffer::Init	(	const Handle< OpenGl_Context > &	theGlCtx,
		const GLsizei	theViewportSizeX,
		const GLsizei	theViewportSizeY,
		const GLboolean	toForcePowerOfTwo = `GL_FALSE`
	)

Notice! Obsolete hardware (GeForce FX etc) doesn't support rectangular textures! There are 3 possible results if you are trying to create non power-of-two FBO on these cards: 1) FBO creation will fail, current implementation will try to generate compatible FBO; 2) FBO rendering will be done in software mode (ForceWare 'hack'); 3) FBO rendering will be incorrect (some obsolete Catalyst drivers).

Standard_Boolean OpenGl_FrameBuffer::IsValid ( ) const

inline

Returns true if current object was initialized.

virtual void OpenGl_FrameBuffer::Release ( const OpenGl_Context * theGlCtx )

virtual

Destroy object - will release GPU memory if any.

Implements OpenGl_Resource.

void OpenGl_FrameBuffer::SetupViewport ( const Handle< OpenGl_Context > & theGlCtx )

Setup viewport to render into FBO.

void OpenGl_FrameBuffer::UnbindBuffer ( const Handle< OpenGl_Context > & theGlCtx )

Unbind frame buffer.

void OpenGl_FrameBuffer::UnbindTexture ( const Handle< OpenGl_Context > & theGlCtx )

Unbind the texture.

Field Documentation

const GLuint OpenGl_FrameBuffer::NO_FRAMEBUFFER = 0

static

const GLuint OpenGl_FrameBuffer::NO_RENDERBUFFER = 0

static

const GLuint OpenGl_FrameBuffer::NO_TEXTURE = 0

static

Helpful constants.

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

OpenGl_FrameBuffer.hxx

Public Member Functions

Static Public Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Field Documentation