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 &)

	ClassDef (TGLContext, 0)

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>

Constructor & Destructor Documentation

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.

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::TGLContext ( const TGLContext & )

private

Member Function Documentation

TGLContext::ClassDef	(	TGLContext	,
		0
	)

private

Bool_t TGLContext::ClearCurrent ( )

Reset current context.

Definition at line 392 of file TGLContext.cxx.

Referenced by TGLWidget::ClearCurrent().

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().

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().

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 MakeCurrent().

Bool_t TGLContext::IsValid ( ) const

inline

Definition at line 68 of file TGLContext.h.

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

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 TGLWidget::MakeCurrent().

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

private

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 ~TGLContext().

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 TGLContext().

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 TGLWidget::SwapBuffers().