OpenGL state storage. More...

#include <vtkOpenGLState.h>

Inheritance diagram for vtkOpenGLState:

Collaboration diagram for vtkOpenGLState:

Classes
class	BufferBindingState

class	GLState

class	ScopedglActiveTexture

class	ScopedglBlendFuncSeparate

class	ScopedglClearColor

class	ScopedglColorMask

class	ScopedglDepthFunc

class	ScopedglDepthMask

class	ScopedglEnableDisable

class	ScopedglScissor

class	ScopedglViewport

class	ScopedValue

Public Types
typedef vtkObject	Superclass

Public Member Functions
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class.

vtkOpenGLState *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.

void	GetBlendFuncState (int *)

bool	GetEnumState (unsigned int name)

void	SetEnumState (unsigned int name, bool value)

void	ResetEnumState (unsigned int name)
	convenience method to reset an enum state from current openGL context

void	ActivateTexture (vtkTextureObject *)
	Activate a texture unit for this texture.

void	DeactivateTexture (vtkTextureObject *)
	Deactivate a previously activated texture.

int	GetTextureUnitForTexture (vtkTextureObject *)
	Get the texture unit for a given texture object.

void	VerifyNoActiveTextures ()
	Check to make sure no textures have been left active.

void	Initialize (vtkOpenGLRenderWindow *)
	Initialize OpenGL context using current state.

void	SetTextureUnitManager (vtkTextureUnitManager *textureUnitManager)
	Set the texture unit manager.

vtkTextureUnitManager *	GetTextureUnitManager ()
	Returns its texture unit manager object.

virtual vtkOpenGLShaderCache *	GetShaderCache ()

virtual vtkOpenGLVertexBufferObjectCache *	GetVBOCache ()

void	SetVBOCache (vtkOpenGLVertexBufferObjectCache *val)

int	GetDefaultTextureInternalFormat (int vtktype, int numComponents, bool needInteger, bool needFloat, bool needSRGB)
	Get a mapping of vtk data types to native texture formats for this window we put this on the RenderWindow so that every texture does not have to build these structures themselves.

void	GetCurrentDrawFramebufferState (unsigned int &drawBinding, unsigned int &drawBuffer)
	Get the current stored state of the draw buffer and binding.

void	vtkglBlitFramebuffer (int, int, int, int, int, int, int, int, unsigned int, unsigned int)
	Perform a blit but handle some driver bugs safely.

void	Reset ()
	Record the OpenGL state into this class.

void	Push ()
	Push all the recorded state onto the stack.

void	Pop ()
	Pop the state stack to restore a previous state.

std::string const &	GetVersion ()
	Return the opengl version for this context.

std::string const &	GetVendor ()
	Return the opengl vendor for this context.

std::string const &	GetRenderer ()
	Return the opengl renderer for this context.


void	vtkglClearColor (float red, float green, float blue, float alpha)

void	vtkglClearDepth (double depth)

void	vtkglDepthFunc (unsigned int val)

void	vtkglDepthMask (unsigned char flag)

void	vtkglColorMask (unsigned char r, unsigned char g, unsigned char b, unsigned char a)

void	vtkglViewport (int x, int y, int width, int height)

void	vtkglScissor (int x, int y, int width, int height)

void	vtkglEnable (unsigned int cap)

void	vtkglDisable (unsigned int cap)

void	vtkglBlendFunc (unsigned int sfactor, unsigned int dfactor)

void	vtkglBlendFuncSeparate (unsigned int sfactorRGB, unsigned int dfactorRGB, unsigned int sfactorAlpha, unsigned int dfactorAlpha)

void	vtkglBlendEquation (unsigned int val)

void	vtkglBlendEquationSeparate (unsigned int col, unsigned int alpha)

void	vtkglCullFace (unsigned int val)

void	vtkglActiveTexture (unsigned int)

void	vtkglBindFramebuffer (unsigned int target, unsigned int fb)

void	vtkglDrawBuffer (unsigned int)

void	vtkglDrawBuffers (unsigned int n, unsigned int *)

void	vtkglReadBuffer (unsigned int)

void	vtkglPointSize (float)

void	vtkglLineWidth (float)

void	vtkglStencilMaskSeparate (unsigned int face, unsigned int mask)

void	vtkglStencilMask (unsigned int mask)

void	vtkglStencilOpSeparate (unsigned int face, unsigned int sfail, unsigned int dpfail, unsigned int dppass)

void	vtkglStencilOp (unsigned int sfail, unsigned int dpfail, unsigned int dppass)

void	vtkglStencilFuncSeparate (unsigned int face, unsigned int func, int ref, unsigned int mask)

void	vtkglStencilFunc (unsigned int func, int ref, unsigned int mask)

void	vtkBindFramebuffer (unsigned int target, vtkOpenGLFramebufferObject *fo)

void	vtkDrawBuffers (unsigned int n, unsigned int , vtkOpenGLFramebufferObject )

void	vtkReadBuffer (unsigned int, vtkOpenGLFramebufferObject *)

void	vtkglPixelStorei (unsigned int, int)


void	ResetGLClearColorState ()

void	ResetGLClearDepthState ()

void	ResetGLDepthFuncState ()

void	ResetGLDepthMaskState ()

void	ResetGLColorMaskState ()

void	ResetGLViewportState ()

void	ResetGLScissorState ()

void	ResetGLBlendFuncState ()

void	ResetGLBlendEquationState ()

void	ResetGLCullFaceState ()

void	ResetGLActiveTexture ()


void	vtkglClear (unsigned int mask)


void	vtkglGetBooleanv (unsigned int pname, unsigned char *params)

void	vtkglGetIntegerv (unsigned int pname, int *params)

void	vtkglGetDoublev (unsigned int pname, double *params)

void	vtkglGetFloatv (unsigned int pname, float *params)


void	PushFramebufferBindings ()
	Store/Restore the current framebuffer bindings and buffers.

void	PushDrawFramebufferBinding ()
	Store/Restore the current framebuffer bindings and buffers.

void	PushReadFramebufferBinding ()
	Store/Restore the current framebuffer bindings and buffers.

void	PopFramebufferBindings ()
	Store/Restore the current framebuffer bindings and buffers.

void	PopDrawFramebufferBinding ()
	Store/Restore the current framebuffer bindings and buffers.

void	PopReadFramebufferBinding ()
	Store/Restore the current framebuffer bindings and buffers.

void	ResetFramebufferBindings ()
	Store/Restore the current framebuffer bindings and buffers.

Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)

virtual void	DebugOn ()
	Turn debugging output on.

virtual void	DebugOff ()
	Turn debugging output off.

bool	GetDebug ()
	Get the value of the debug flag.

void	SetDebug (bool debugFlag)
	Set the value of the debug flag.

virtual void	Modified ()
	Update the modification time for this object.

virtual vtkMTimeType	GetMTime ()
	Return this object's modified time.

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

vtkTypeBool	HasObserver (unsigned long event)

vtkTypeBool	HasObserver (const char *event)

vtkTypeBool	InvokeEvent (unsigned long event)

vtkTypeBool	InvokeEvent (const char *event)

std::string	GetObjectDescription () const override
	The object description printed in messages and PrintSelf output.

unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkCommand *	GetCommand (unsigned long tag)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObserver (vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObservers (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObservers (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkTypeBool	HasObserver (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Allow user to set the AbortFlagOn() with the return value of the callback method.

vtkTypeBool	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not.

vtkTypeBool	InvokeEvent (const char event, void callData)
	This method invokes an event and return whether the event was aborted or not.

virtual void	SetObjectName (const std::string &objectName)
	Set/get the name of this object for reporting purposes.

virtual std::string	GetObjectName () const
	Set/get the name of this object for reporting purposes.

Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string.

virtual std::string	GetObjectDescription () const
	The object description printed in messages and PrintSelf output.

virtual vtkTypeBool	IsA (const char *name)
	Return 1 if this class is the same type of (or a subclass of) the named class.

virtual vtkIdType	GetNumberOfGenerationsFromBase (const char *name)
	Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

virtual void	Delete ()
	Delete a VTK object.

virtual void	FastDelete ()
	Delete a reference to this object.

void	InitializeObjectBase ()

void	Print (ostream &os)
	Print an object to an ostream.

void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object).

virtual void	UnRegister (vtkObjectBase *o)
	Decrease the reference count (release by another object).

int	GetReferenceCount ()
	Return the current reference count of this object.

void	SetReferenceCount (int)
	Sets the reference count.

bool	GetIsInMemkind () const
	A local state flag that remembers whether this object lives in the normal or extended memory space.

virtual void	PrintHeader (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.

virtual void	PrintTrailer (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.

virtual bool	UsesGarbageCollector () const
	Indicate whether the class uses `vtkGarbageCollector` or not.

Static Public Member Functions
static vtkOpenGLState *	New ()

static vtkTypeBool	IsTypeOf (const char *type)

static vtkOpenGLState *	SafeDownCast (vtkObjectBase *o)

Static Public Member Functions inherited from vtkObject
static vtkObject *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

static void	BreakOnError ()
	This method is called when vtkErrorMacro executes.

static void	SetGlobalWarningDisplay (vtkTypeBool val)
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static void	GlobalWarningDisplayOn ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static void	GlobalWarningDisplayOff ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static vtkTypeBool	GetGlobalWarningDisplay ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool	IsTypeOf (const char *name)
	Return 1 if this class type is the same type of (or a subclass of) the named class.

static vtkIdType	GetNumberOfGenerationsFromBaseType (const char *name)
	Given a the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

static void	SetMemkindDirectory (const char *directoryname)
	The name of a directory, ideally mounted -o dax, to memory map an extended memory space within.

static bool	GetUsingMemkind ()
	A global state flag that controls whether vtkObjects are constructed in the usual way (the default) or within the extended memory space.

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkOpenGLState ()

	~vtkOpenGLState () override

void	BlendFuncSeparate (std::array< unsigned int, 4 > val)

void	ClearColor (std::array< float, 4 > val)

void	ColorMask (std::array< unsigned char, 4 > val)

void	Scissor (std::array< int, 4 > val)

void	Viewport (std::array< int, 4 > val)

void	InitializeTextureInternalFormats ()

void	CheckState ()
	Check that this OpenGL state has consistent values with the current OpenGL context.

Protected Member Functions inherited from vtkObject
	vtkObject ()

	~vtkObject () override

void	RegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	InternalGrabFocus (vtkCommand mouseEvents, vtkCommand keypressEvents=nullptr)
	These methods allow a command to exclusively grab all events.

void	InternalReleaseFocus ()
	These methods allow a command to exclusively grab all events.

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	RegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	ReportReferences (vtkGarbageCollector *)

virtual void	ObjectFinalize ()

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Protected Attributes
int	TextureInternalFormats [VTK_OBJECT+1][3][5]

vtkTextureUnitManager *	TextureUnitManager

std::map< const vtkTextureObject *, int >	TextureResourceIds

std::list< BufferBindingState >	DrawBindings

std::list< BufferBindingState >	ReadBindings

int	MajorVersion

int	MinorVersion

int	MaxTessellationLevel

int	MaxTextureSize

std::string	Vendor

std::string	Renderer

std::string	Version

std::stack< GLState >	Stack

vtkOpenGLVertexBufferObjectCache *	VBOCache

vtkOpenGLShaderCache *	ShaderCache

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

std::string	ObjectName

Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t >	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Additional Inherited Members
Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction	GetCurrentMallocFunction ()

static vtkReallocingFunction	GetCurrentReallocFunction ()

static vtkFreeingFunction	GetCurrentFreeFunction ()

static vtkFreeingFunction	GetAlternateFreeFunction ()

Detailed Description

OpenGL state storage.

vtkOpenGLState is a class designed to keep track of the state of an OpenGL context. Applications using VTK have so much control over the rendering process that is can be difficult in VTK code to know if the OpenGL state is correct for your code. The two traditional solutions have been to set everything yourself and to save and restore OpenGL state that you change. The former makes your code work, the latter helps prevent your code from breaking something else. The problem is that the former results in tons of redundant OpenGL calls and the later is done by querying the OpenGL state which can cause a pipeline sync/stall which is very slow.

To address these issues this class stores OpenGL state for commonly used functions. Requests made to change state to the current state become no-ops. Queries of state can be done by querying the state stored in this class without impacting the OpenGL driver.

This class is designed to hold all context related values and could just as well be considered a representation of the OpenGL context.

To facilitate saving state and restoring it this class contains a number of nested classes named Scoped<glFunction> that store the state of that glFunction and when they go out of scope they restore it. This is useful when you want to change the OpenGL state and then automatically restore it when done. They can be used as follows

{ vtkOpenGLState *ostate = renWin->GetState(); vtkOpenGLState::ScopedglDepthMask dmsaved(ostate); // the prior state is now saved ... ostate->glDepthMask(GL_TRUE); // maybe change the state ... etc } // prior state will be restored here as it goes out of scope

You must use this class to make state changing OpenGL class otherwise the results will be undefined.

For convenience some OpenGL calls that do not impact state are also provided.

Definition at line 70 of file vtkOpenGLState.h.

Member Typedef Documentation

◆ Superclass

typedef vtkObject vtkOpenGLState::Superclass

Definition at line 74 of file vtkOpenGLState.h.

Constructor & Destructor Documentation

◆ vtkOpenGLState()

vtkOpenGLState::vtkOpenGLState ( )

protected

◆ ~vtkOpenGLState()

vtkOpenGLState::~vtkOpenGLState ( )

overrideprotected

Member Function Documentation

◆ New()

static vtkOpenGLState * vtkOpenGLState::New ( )

static

◆ IsTypeOf()

static vtkTypeBool vtkOpenGLState::IsTypeOf ( const char * type )

static

◆ IsA()

virtual vtkTypeBool vtkOpenGLState::IsA ( const char * name )

virtual

Return 1 if this class is the same type of (or a subclass of) the named class.

Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkObjectBase.

◆ SafeDownCast()

static vtkOpenGLState * vtkOpenGLState::SafeDownCast ( vtkObjectBase * o )

static

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkOpenGLState::NewInstanceInternal ( ) const

protectedvirtual

◆ NewInstance()

vtkOpenGLState * vtkOpenGLState::NewInstance ( ) const

◆ PrintSelf()

void vtkOpenGLState::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

overridevirtual

Methods invoked by print to print information about the object including superclasses.

Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkObject.

◆ vtkglClearColor()

void vtkOpenGLState::vtkglClearColor	(	float	red,
		float	green,
		float	blue,
		float	alpha
	)

◆ vtkglClearDepth()

void vtkOpenGLState::vtkglClearDepth ( double depth )

◆ vtkglDepthFunc()

void vtkOpenGLState::vtkglDepthFunc ( unsigned int val )

◆ vtkglDepthMask()

void vtkOpenGLState::vtkglDepthMask ( unsigned char flag )

◆ vtkglColorMask()

void vtkOpenGLState::vtkglColorMask	(	unsigned char	r,
		unsigned char	g,
		unsigned char	b,
		unsigned char	a
	)

◆ vtkglViewport()

void vtkOpenGLState::vtkglViewport	(	int	x,
		int	y,
		int	width,
		int	height
	)

◆ vtkglScissor()

void vtkOpenGLState::vtkglScissor	(	int	x,
		int	y,
		int	width,
		int	height
	)

◆ vtkglEnable()

void vtkOpenGLState::vtkglEnable ( unsigned int cap )

◆ vtkglDisable()

void vtkOpenGLState::vtkglDisable ( unsigned int cap )

◆ vtkglBlendFunc()

void vtkOpenGLState::vtkglBlendFunc	(	unsigned int	sfactor,
		unsigned int	dfactor
	)

inline

Definition at line 91 of file vtkOpenGLState.h.

◆ vtkglBlendFuncSeparate()

void vtkOpenGLState::vtkglBlendFuncSeparate	(	unsigned int	sfactorRGB,
		unsigned int	dfactorRGB,
		unsigned int	sfactorAlpha,
		unsigned int	dfactorAlpha
	)

◆ vtkglBlendEquation()

void vtkOpenGLState::vtkglBlendEquation ( unsigned int val )

◆ vtkglBlendEquationSeparate()

void vtkOpenGLState::vtkglBlendEquationSeparate	(	unsigned int	col,
		unsigned int	alpha
	)

◆ vtkglCullFace()

void vtkOpenGLState::vtkglCullFace ( unsigned int val )

◆ vtkglActiveTexture()

void vtkOpenGLState::vtkglActiveTexture ( unsigned int )

◆ vtkglBindFramebuffer()

void vtkOpenGLState::vtkglBindFramebuffer	(	unsigned int	target,
		unsigned int	fb
	)

◆ vtkglDrawBuffer()

void vtkOpenGLState::vtkglDrawBuffer ( unsigned int )

◆ vtkglDrawBuffers()

void vtkOpenGLState::vtkglDrawBuffers	(	unsigned int	n,
		unsigned int *
	)

◆ vtkglReadBuffer()

void vtkOpenGLState::vtkglReadBuffer ( unsigned int )

◆ vtkglPointSize()

void vtkOpenGLState::vtkglPointSize ( float )

◆ vtkglLineWidth()

void vtkOpenGLState::vtkglLineWidth ( float )

◆ vtkglStencilMaskSeparate()

void vtkOpenGLState::vtkglStencilMaskSeparate	(	unsigned int	face,
		unsigned int	mask
	)

◆ vtkglStencilMask()

void vtkOpenGLState::vtkglStencilMask ( unsigned int mask )

◆ vtkglStencilOpSeparate()

void vtkOpenGLState::vtkglStencilOpSeparate	(	unsigned int	face,
		unsigned int	sfail,
		unsigned int	dpfail,
		unsigned int	dppass
	)

◆ vtkglStencilOp()

void vtkOpenGLState::vtkglStencilOp	(	unsigned int	sfail,
		unsigned int	dpfail,
		unsigned int	dppass
	)

◆ vtkglStencilFuncSeparate()

void vtkOpenGLState::vtkglStencilFuncSeparate	(	unsigned int	face,
		unsigned int	func,
		int	ref,
		unsigned int	mask
	)

◆ vtkglStencilFunc()

void vtkOpenGLState::vtkglStencilFunc	(	unsigned int	func,
		int	ref,
		unsigned int	mask
	)

◆ vtkBindFramebuffer()

void vtkOpenGLState::vtkBindFramebuffer	(	unsigned int	target,
		vtkOpenGLFramebufferObject *	fo
	)

◆ vtkDrawBuffers()

void vtkOpenGLState::vtkDrawBuffers	(	unsigned int	n,
		unsigned int *	,
		vtkOpenGLFramebufferObject *
	)

◆ vtkReadBuffer()

void vtkOpenGLState::vtkReadBuffer	(	unsigned int	,
		vtkOpenGLFramebufferObject *
	)

◆ vtkglPixelStorei()

void vtkOpenGLState::vtkglPixelStorei	(	unsigned int	,
		int
	)

◆ ResetGLClearColorState()

void vtkOpenGLState::ResetGLClearColorState ( )

◆ ResetGLClearDepthState()

void vtkOpenGLState::ResetGLClearDepthState ( )

◆ ResetGLDepthFuncState()

void vtkOpenGLState::ResetGLDepthFuncState ( )

◆ ResetGLDepthMaskState()

void vtkOpenGLState::ResetGLDepthMaskState ( )

◆ ResetGLColorMaskState()

void vtkOpenGLState::ResetGLColorMaskState ( )

◆ ResetGLViewportState()

void vtkOpenGLState::ResetGLViewportState ( )

◆ ResetGLScissorState()

void vtkOpenGLState::ResetGLScissorState ( )

◆ ResetGLBlendFuncState()

void vtkOpenGLState::ResetGLBlendFuncState ( )

◆ ResetGLBlendEquationState()

void vtkOpenGLState::ResetGLBlendEquationState ( )

◆ ResetGLCullFaceState()

void vtkOpenGLState::ResetGLCullFaceState ( )

◆ ResetGLActiveTexture()

void vtkOpenGLState::ResetGLActiveTexture ( )

◆ vtkglClear()

void vtkOpenGLState::vtkglClear ( unsigned int mask )

◆ vtkglGetBooleanv()

void vtkOpenGLState::vtkglGetBooleanv	(	unsigned int	pname,
		unsigned char *	params
	)

◆ vtkglGetIntegerv()

void vtkOpenGLState::vtkglGetIntegerv	(	unsigned int	pname,
		int *	params
	)

◆ vtkglGetDoublev()

void vtkOpenGLState::vtkglGetDoublev	(	unsigned int	pname,
		double *	params
	)

◆ vtkglGetFloatv()

void vtkOpenGLState::vtkglGetFloatv	(	unsigned int	pname,
		float *	params
	)

◆ GetBlendFuncState()

void vtkOpenGLState::GetBlendFuncState ( int * )

◆ GetEnumState()

bool vtkOpenGLState::GetEnumState ( unsigned int name )

◆ SetEnumState()

void vtkOpenGLState::SetEnumState	(	unsigned int	name,
		bool	value
	)

◆ ResetEnumState()

void vtkOpenGLState::ResetEnumState ( unsigned int name )

convenience method to reset an enum state from current openGL context

◆ ActivateTexture()

void vtkOpenGLState::ActivateTexture ( vtkTextureObject * )

Activate a texture unit for this texture.

◆ DeactivateTexture()

void vtkOpenGLState::DeactivateTexture ( vtkTextureObject * )

Deactivate a previously activated texture.

◆ GetTextureUnitForTexture()

int vtkOpenGLState::GetTextureUnitForTexture ( vtkTextureObject * )

Get the texture unit for a given texture object.

◆ VerifyNoActiveTextures()

void vtkOpenGLState::VerifyNoActiveTextures ( )

Check to make sure no textures have been left active.