TGLContext Class Reference

This class encapsulates window-system specific information about a GL-context and alows their proper management in ROOT.

Definition at line 33 of file TGLContext.h.

Public Member Functions
	TGLContext (TGLWidget *glWidget, Bool_t shareDefault=kTRUE, const TGLContext *shareList=0)
	TGLContext ctor "from" TGLWidget. More...
TGLContextIdentity *	GetIdentity () const
	We can have several shared contexts, and gl-scene wants to know, if some context (defined by its identity) can be used. More...
virtual	~TGLContext ()
	TGLContext dtor. More...
Bool_t	MakeCurrent ()
	If context is valid (TGLPaintDevice, for which context was created still exists), make it current. More...
Bool_t	ClearCurrent ()
	Reset current context. More...
void	SwapBuffers ()
	If context is valid (TGLPaintDevice, for which context was created still exists), swap buffers (in case of P-buffer call glFinish()). More...
void	SetContext (TGLWidget *widget, const TGLContext *shareList)
	X11 gl-context creation. More...
void	Release ()
	Make the context invalid and (do thread switch, if needed) free resources. More...
Bool_t	IsValid () const

Static Public Member Functions
static TGLContext *	GetCurrent ()
	Ask TGLContextPrivate to lookup context in its internal map. More...
static void	GlewInit ()
	Initialize GLEW - static private function. More...

Private Member Functions
	TGLContext (const TGLContext &)
TGLContext &	operator= (const TGLContext &)

Private Attributes
TGLPaintDevice *	fDevice
TGLContextPrivate *	fPimpl
Bool_t	fFromCtor
Bool_t	fValid
TGLContextIdentity *	fIdentity

Static Private Attributes
static Bool_t	fgGlewInitDone = kFALSE

Friends
class	TGLContextPrivate
class	TGLWidget

#include <TGLContext.h>

Collaboration diagram for TGLContext:

Constructor & Destructor Documentation

TGLContext() [1/2]

TGLContext::TGLContext	(	TGLWidget *	wid,
		Bool_t	shareDefault = kTRUE,
		const TGLContext *	shareList = 0
	)

TGLContext ctor "from" TGLWidget.

Is shareDefault is true, the shareList is set from default context-identity. Otherwise the given shareList is used (can be null). Makes thread switching.

Definition at line 51 of file TGLContext.cxx.

Referenced by IsValid().

~TGLContext()

TGLContext::~TGLContext ( )

virtual

TGLContext dtor.

If it's called before TGLPaintDevice's dtor (context is valid) resource will be freed and context un-registered.

Definition at line 434 of file TGLContext.cxx.

TGLContext() [2/2]

TGLContext::TGLContext ( const TGLContext &  )

private

Member Function Documentation

ClearCurrent()

Bool_t TGLContext::ClearCurrent

(

)

Reset current context.

Definition at line 392 of file TGLContext.cxx.

Referenced by TGLWidget::ClearCurrent(), and GlewInit().

GetCurrent()

TGLContext * TGLContext::GetCurrent ( )

static

Ask TGLContextPrivate to lookup context in its internal map.

Definition at line 459 of file TGLContext.cxx.

Referenced by TGLContextIdentity::GetCurrent(), IsValid(), and TGLContextIdentity::IsValid().

GetIdentity()

TGLContextIdentity * TGLContext::GetIdentity

(

)

const

We can have several shared contexts, and gl-scene wants to know, if some context (defined by its identity) can be used.

Definition at line 451 of file TGLContext.cxx.

Referenced by TGLContextIdentity::GetCurrent(), and TGLContext().

GlewInit()

void TGLContext::GlewInit ( )

static

Initialize GLEW - static private function.

Called immediately after creation of the first GL context.

Definition at line 86 of file TGLContext.cxx.

Referenced by IsValid(), and MakeCurrent().

IsValid()

Bool_t TGLContext::IsValid ( ) const

inline

Definition at line 68 of file TGLContext.h.

Referenced by TGLContextPrivate::RegisterContext(), and TGLContextPrivate::RemoveContext().

MakeCurrent()

Bool_t TGLContext::MakeCurrent

(

)

If context is valid (TGLPaintDevice, for which context was created still exists), make it current.

Definition at line 368 of file TGLContext.cxx.

Referenced by GlewInit(), TGLWidget::MakeCurrent(), and TGLPaintDevice::~TGLPaintDevice().

operator=()

TGLContext& TGLContext::operator= ( const TGLContext &  )

private

Referenced by IsValid().

Release()

void TGLContext::Release

(

)

Make the context invalid and (do thread switch, if needed) free resources.

Definition at line 418 of file TGLContext.cxx.

Referenced by GlewInit(), and ~TGLContext().

SetContext()

void TGLContext::SetContext	(	TGLWidget *	widget,
		const TGLContext *	shareList
	)

X11 gl-context creation.

Defined as a member-function (this code removed from ctor) to make WIN32/X11 separation cleaner. This function is public only for calls via gROOT and called from ctor.

Definition at line 333 of file TGLContext.cxx.

Referenced by GlewInit(), and TGLContext().

SwapBuffers()

void TGLContext::SwapBuffers

(

)

If context is valid (TGLPaintDevice, for which context was created still exists), swap buffers (in case of P-buffer call glFinish()).

Definition at line 401 of file TGLContext.cxx.

Referenced by GlewInit(), TGLWidget::SwapBuffers(), and TGLPaintDevice::~TGLPaintDevice().

Friends And Related Function Documentation

TGLContextPrivate

friend class TGLContextPrivate

friend

Definition at line 35 of file TGLContext.h.

TGLWidget

friend class TGLWidget

friend

Definition at line 36 of file TGLContext.h.

Member Data Documentation

fDevice

TGLPaintDevice* TGLContext::fDevice

private

Definition at line 40 of file TGLContext.h.

Referenced by GlewInit(), SetContext(), and ~TGLContext().

fFromCtor

Bool_t TGLContext::fFromCtor

private

Definition at line 43 of file TGLContext.h.

Referenced by GlewInit(), SetContext(), and TGLContext().

fgGlewInitDone

Bool_t TGLContext::fgGlewInitDone = kFALSE

staticprivate

Definition at line 48 of file TGLContext.h.

Referenced by GlewInit(), and MakeCurrent().

fIdentity

TGLContextIdentity* TGLContext::fIdentity

private

Definition at line 46 of file TGLContext.h.

Referenced by GetIdentity(), GlewInit(), MakeCurrent(), TGLContext(), and ~TGLContext().

fPimpl

TGLContextPrivate* TGLContext::fPimpl

private

Definition at line 41 of file TGLContext.h.

Referenced by ClearCurrent(), GlewInit(), MakeCurrent(), TGLContextPrivate::RegisterContext(), Release(), TGLContextPrivate::RemoveContext(), SetContext(), SwapBuffers(), and ~TGLContext().

fValid

Bool_t TGLContext::fValid

private

Definition at line 44 of file TGLContext.h.

Referenced by GlewInit(), IsValid(), MakeCurrent(), Release(), SetContext(), SwapBuffers(), and ~TGLContext().

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

• graf3d/gl/inc/TGLContext.h
• graf3d/gl/src/TGLContext.cxx