TGLContext Class Reference

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

Definition at line 30 of file TGLContext.h.

Public Member Functions
	TGLContext (TGLWidget *glWidget, Bool_t shareDefault=kTRUE, const TGLContext *shareList=nullptr)
	TGLContext ctor "from" TGLWidget.
virtual	~TGLContext ()
	TGLContext dtor.
Bool_t	ClearCurrent ()
	Reset current context.
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.
virtual TClass *	IsA () const
Bool_t	IsValid () const
Bool_t	MakeCurrent ()
	If context is valid (TGLPaintDevice, for which context was created still exists), make it current.
void	Release ()
	Make the context invalid and (do thread switch, if needed) free resources.
void	SetContext (TGLWidget *widget, const TGLContext *shareList)
	X11 gl-context creation.
virtual void	Streamer (TBuffer &)
void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
void	SwapBuffers ()
	If context is valid (TGLPaintDevice, for which context was created still exists), swap buffers (in case of P-buffer call glFinish()).

Static Public Member Functions
static TClass *	Class ()
static const char *	Class_Name ()
static constexpr Version_t	Class_Version ()
static const char *	DeclFileName ()
static TGLContext *	GetCurrent ()
	Ask TGLContextPrivate to lookup context in its internal map.
static void	GlewInit ()
	Initialize GLEW - static private function.

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

Private Attributes
TGLPaintDevice *	fDevice
Bool_t	fFromCtor
TGLContextIdentity *	fIdentity
std::unique_ptr< TGLContextPrivate >	fPimpl
Bool_t	fValid

Static Private Attributes
static Bool_t	fgGlewInitDone = kFALSE

Friends
class	TGLContextPrivate
class	TGLWidget

#include <TGLContext.h>

Constructor & Destructor Documentation

TGLContext() [1/2]

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

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 52 of file TGLContext.cxx.

~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 429 of file TGLContext.cxx.

TGLContext() [2/2]

TGLContext::TGLContext ( const TGLContext &  )

private

Member Function Documentation

Class()

static TClass * TGLContext::Class ( )

static

Returns

TClass describing this class

Class_Name()

static const char * TGLContext::Class_Name ( )

static

Returns

Name of this class

Class_Version()

static constexpr Version_t TGLContext::Class_Version ( )

inlinestaticconstexpr

Returns

Version of this class

Definition at line 74 of file TGLContext.h.

ClearCurrent()

Bool_t TGLContext::ClearCurrent

(

)

Reset current context.

Definition at line 387 of file TGLContext.cxx.

DeclFileName()

static const char * TGLContext::DeclFileName ( )

inlinestatic

Returns

Name of the file containing the class declaration

Definition at line 74 of file TGLContext.h.

GetCurrent()

TGLContext * TGLContext::GetCurrent ( )

static

Ask TGLContextPrivate to lookup context in its internal map.

Definition at line 452 of file TGLContext.cxx.

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 444 of file TGLContext.cxx.

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.

IsA()

virtual TClass * TGLContext::IsA ( ) const

inlinevirtual

Returns

TClass describing current object

Definition at line 74 of file TGLContext.h.

IsValid()

Bool_t TGLContext::IsValid ( ) const

inline

Definition at line 65 of file TGLContext.h.

MakeCurrent()

Bool_t TGLContext::MakeCurrent

(

)

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

Definition at line 363 of file TGLContext.cxx.

operator=()

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

private

Release()

void TGLContext::Release

(

)

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

Definition at line 413 of file TGLContext.cxx.

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 330 of file TGLContext.cxx.

Streamer()

virtual void TGLContext::Streamer ( TBuffer &  )

virtual

StreamerNVirtual()

void TGLContext::StreamerNVirtual ( TBuffer &  ClassDef_StreamerNVirtual_b )

inline

Definition at line 74 of file TGLContext.h.

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 396 of file TGLContext.cxx.

Friends And Related Symbol Documentation

TGLContextPrivate

friend class TGLContextPrivate

friend

Definition at line 32 of file TGLContext.h.

TGLWidget

friend class TGLWidget

friend

Definition at line 33 of file TGLContext.h.

Member Data Documentation

fDevice

TGLPaintDevice* TGLContext::fDevice

private

Definition at line 37 of file TGLContext.h.

fFromCtor

Bool_t TGLContext::fFromCtor

private

Definition at line 40 of file TGLContext.h.

fgGlewInitDone

Bool_t TGLContext::fgGlewInitDone = kFALSE

staticprivate

Definition at line 45 of file TGLContext.h.

fIdentity

TGLContextIdentity* TGLContext::fIdentity

private

Definition at line 43 of file TGLContext.h.

fPimpl

std::unique_ptr<TGLContextPrivate> TGLContext::fPimpl

private

Definition at line 38 of file TGLContext.h.

fValid

Bool_t TGLContext::fValid

private

Definition at line 41 of file TGLContext.h.

Libraries for 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