osg::BlendFunc Class Reference

Inheritance diagram for osg::BlendFunc:


Public Types
	DST_ALPHA = GL_DST_ALPHA
	DST_COLOR = GL_DST_COLOR
	ONE = GL_ONE
	ONE_MINUS_DST_ALPHA = GL_ONE_MINUS_DST_ALPHA
	ONE_MINUS_DST_COLOR = GL_ONE_MINUS_DST_COLOR
	ONE_MINUS_SRC_ALPHA = GL_ONE_MINUS_SRC_ALPHA
	ONE_MINUS_SRC_COLOR = GL_ONE_MINUS_SRC_COLOR
	SRC_ALPHA = GL_SRC_ALPHA
	SRC_ALPHA_SATURATE = GL_SRC_ALPHA_SATURATE
	SRC_COLOR = GL_SRC_COLOR
	CONSTANT_COLOR = GL_CONSTANT_COLOR
	ONE_MINUS_CONSTANT_COLOR = GL_ONE_MINUS_CONSTANT_COLOR
	CONSTANT_ALPHA = GL_CONSTANT_ALPHA
	ONE_MINUS_CONSTANT_ALPHA = GL_ONE_MINUS_CONSTANT_ALPHA
	ZERO = GL_ZERO
enum	BlendFuncMode { DST_ALPHA = GL_DST_ALPHA, DST_COLOR = GL_DST_COLOR, ONE = GL_ONE, ONE_MINUS_DST_ALPHA = GL_ONE_MINUS_DST_ALPHA, ONE_MINUS_DST_COLOR = GL_ONE_MINUS_DST_COLOR, ONE_MINUS_SRC_ALPHA = GL_ONE_MINUS_SRC_ALPHA, ONE_MINUS_SRC_COLOR = GL_ONE_MINUS_SRC_COLOR, SRC_ALPHA = GL_SRC_ALPHA, SRC_ALPHA_SATURATE = GL_SRC_ALPHA_SATURATE, SRC_COLOR = GL_SRC_COLOR, CONSTANT_COLOR = GL_CONSTANT_COLOR, ONE_MINUS_CONSTANT_COLOR = GL_ONE_MINUS_CONSTANT_COLOR, CONSTANT_ALPHA = GL_CONSTANT_ALPHA, ONE_MINUS_CONSTANT_ALPHA = GL_ONE_MINUS_CONSTANT_ALPHA, ZERO = GL_ZERO }
Public Member Functions
	BlendFunc ()
	BlendFunc (GLenum source, GLenum destination)
	BlendFunc (GLenum source, GLenum destination, GLenum source_alpha, GLenum destination_alpha)
	BlendFunc (const BlendFunc &trans, const CopyOp &copyop=CopyOp::SHALLOW_COPY)
	META_StateAttribute (osg, BlendFunc, BLENDFUNC)
virtual int	compare (const StateAttribute &sa) const
virtual bool	getModeUsage (ModeUsage &usage) const
void	setFunction (GLenum source, GLenum destination)
void	setFunction (GLenum source_rgb, GLenum destination_rgb, GLenum source_alpha, GLenum destination_alpha)
void	setSource (GLenum source)
GLenum	getSource () const
void	setSourceRGB (GLenum source)
GLenum	getSourceRGB () const
void	setSourceAlpha (GLenum source)
GLenum	getSourceAlpha () const
void	setDestination (GLenum destination)
GLenum	getDestination () const
void	setDestinationRGB (GLenum destination)
GLenum	getDestinationRGB () const
void	setDestinationAlpha (GLenum destination)
GLenum	getDestinationAlpha () const
virtual void	apply (State &state) const
Static Public Member Functions
static Extensions *	getExtensions (unsigned int contextID, bool createIfNotInitalized)
static void	setExtensions (unsigned int contextID, Extensions *extensions)
Protected Member Functions
virtual	~BlendFunc ()
Protected Attributes
GLenum	_source_factor
GLenum	_destination_factor
GLenum	_source_factor_alpha
GLenum	_destination_factor_alpha
Classes
class	Extensions

Detailed Description

Encapsulates OpenGL blend/transparency state.

Member Enumeration Documentation

enum osg::BlendFunc::BlendFuncMode

Enumerator:

DST_ALPHA
DST_COLOR
ONE
ONE_MINUS_DST_ALPHA
ONE_MINUS_DST_COLOR
ONE_MINUS_SRC_ALPHA
ONE_MINUS_SRC_COLOR
SRC_ALPHA
SRC_ALPHA_SATURATE
SRC_COLOR
CONSTANT_COLOR
ONE_MINUS_CONSTANT_COLOR
CONSTANT_ALPHA
ONE_MINUS_CONSTANT_ALPHA
ZERO

Constructor & Destructor Documentation

osg::BlendFunc::BlendFunc ( )

osg::BlendFunc::BlendFunc	(	GLenum	source,
		GLenum	destination
	)

osg::BlendFunc::BlendFunc	(	GLenum	source,
		GLenum	destination,
		GLenum	source_alpha,
		GLenum	destination_alpha
	)

osg::BlendFunc::BlendFunc	(	const BlendFunc &	trans,
		const CopyOp &	copyop = `CopyOp::SHALLOW_COPY`
	)			`[inline]`

Copy constructor using CopyOp to manage deep vs shallow copy.

virtual osg::BlendFunc::~BlendFunc ( ) [protected, virtual]

Member Function Documentation

virtual void osg::BlendFunc::apply ( State & state ) const [virtual]

apply the OpenGL state attributes. The global state for the current OpenGL context is passed in to allow the StateAttribute to obtain details on the the current context and state.

Implements osg::StateAttribute.

virtual int osg::BlendFunc::compare ( const StateAttribute & sa ) const [inline, virtual]

Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs.

Implements osg::StateAttribute.

GLenum osg::BlendFunc::getDestination ( ) const [inline]

GLenum osg::BlendFunc::getDestinationAlpha ( ) const [inline]

GLenum osg::BlendFunc::getDestinationRGB ( ) const [inline]

static Extensions* osg::BlendFunc::getExtensions	(	unsigned int	contextID,
		bool	createIfNotInitalized
	)			`[static]`

Returns the Extensions object for the given context. If createIfNotInitalized is true and the Exentsions object doesn't exist, getExtensions() creates it on the given context. Returns NULL if createIfNotInitalized is false and the Extensions object doesn't exist.

virtual bool osg::BlendFunc::getModeUsage ( ModeUsage & usage ) const [inline, virtual]

GLenum osg::BlendFunc::getSource ( ) const [inline]

GLenum osg::BlendFunc::getSourceAlpha ( ) const [inline]

GLenum osg::BlendFunc::getSourceRGB ( ) const [inline]

osg::BlendFunc::META_StateAttribute	(	osg	,
		BlendFunc	,
		BLENDFUNC
	)

void osg::BlendFunc::setDestination ( GLenum destination ) [inline]

void osg::BlendFunc::setDestinationAlpha ( GLenum destination ) [inline]

void osg::BlendFunc::setDestinationRGB ( GLenum destination ) [inline]

static void osg::BlendFunc::setExtensions	(	unsigned int	contextID,
		Extensions *	extensions
	)			`[static]`

setExtensions() allows users to override the extensions across graphics contexts. Typically used when you have different extensions supported across graphics pipes, but need to ensure that they all use the same low common denominator extensions.