LOutputFramebuffer Class Reference

An output framebuffer. More...

Inheritance diagram for LOutputFramebuffer:

Public Member Functions
Float32	scale () const noexcept override
	Gets the scale by which the framebuffer dimensions must be interpreted. More...
const LSize &	sizeB () const noexcept override
	Gets the size of the framebuffer in buffer coordinates. More...
const LRect &	rect () const noexcept override
	Gets the position and size of the framebuffer in surface coordinates. More...
GLuint	id () const noexcept override
	Gets the OpenGL framebuffer ID. More...
Int32	bufferAge () const noexcept override
	Gets the current buffer age. More...
Int32	buffersCount () const noexcept override
	Gets the number of internal framebuffers. More...
Int32	currentBufferIndex () const noexcept override
	Gets the index of the current internal framebuffer. More...
LTexture *	texture (Int32 index=0) const noexcept override
	Gets the OpenGL texture ID of a specific framebuffer index. More...
void	setFramebufferDamage (const LRegion *damage) noexcept override
	Set the damaged region. More...
LTransform	transform () const noexcept override
	Gets the framebuffer transform. More...
Public Member Functions inherited from LFramebuffer
Type	type () const noexcept
	Gets the type of LFramebuffer. More...
Public Member Functions inherited from LObject
	LObject (const LObject &) noexcept
	Copy constructor. More...
LObject &	operator= (const LObject &) noexcept
	Assignment operator (each object has its own individual LWeak reference count). More...
void	setUserData (UIntPtr data) const noexcept
	Store an unsigned integer value/pointer. More...
UIntPtr	userData () const noexcept
	Retrieves the stored unsigned integer value/pointer. More...

Additional Inherited Members
Public Types inherited from LFramebuffer
enum	Type
	Types of framebuffer. More...
Protected Member Functions inherited from LObject
	LObject () noexcept=default
	Constructor of the LObject class. More...
virtual	~LObject () noexcept
	Destructor of the LObject class. More...
void	notifyDestruction () noexcept
	Notifies the object destruction. More...

Detailed Description

An output framebuffer.

An LOutputFramebuffer is a specific type of framebuffer used by an LOutput and managed by the graphic backend.

Note

This class is primarily used internally by Louvre and may have limited utility for library users.

It's advisable to use the interface provided by LOutput instead of directly accessing the methods associated with this class.

See also

LOutput::framebuffer()

LOutput::currentBuffer()

LOutput::buffersCount()

LOutput::bufferTexture()

LOutput::hasBufferDamageSupport()

LOutput::setBufferDamage()

Member Function Documentation

scale()

Float32 scale ( ) const

overridevirtualnoexcept

Gets the scale by which the framebuffer dimensions must be interpreted.

This method must return the scale factor used to interpret the dimensions of the framebuffer.
For example, HiDPI pixmaps/displays may have a scale of 2, whereas low DPI pixmaps/displays may have a scale of 1.

Returns

The scale factor for the framebuffer.

Implements LFramebuffer.

sizeB()

const LSize & sizeB ( ) const

overridevirtualnoexcept

Gets the size of the framebuffer in buffer coordinates.

This method must return the size of the framebuffer in buffer coordinates.

Returns

The size of the framebuffer in buffer coordinates.

Implements LFramebuffer.

rect()

const LRect & rect ( ) const

overridevirtualnoexcept

Gets the position and size of the framebuffer in surface coordinates.

This method must return the position and size of the framebuffer in surface coordinates.

Returns

The rect representing the position and size of the framebuffer in surface coordinates.

Implements LFramebuffer.

id()

GLuint id ( ) const

overridevirtualnoexcept

Gets the OpenGL framebuffer ID.

This method must return the current OpenGL framebuffer ID associated with the instance.

Returns

The OpenGL framebuffer ID.

Implements LFramebuffer.

bufferAge()

Int32 bufferAge ( ) const

overridevirtualnoexcept

Gets the current buffer age.

Reimplemented from LFramebuffer.

buffersCount()

Int32 buffersCount ( ) const

overridevirtualnoexcept

Gets the number of internal framebuffers.

This method is used in implementations like LOutputFramebuffer, which may contain more than one internal framebuffer associated with an LFramebuffer, for example, when double or triple buffering is used.

Returns

The number of internal framebuffers.

Implements LFramebuffer.

currentBufferIndex()

Int32 currentBufferIndex ( ) const

overridevirtualnoexcept

Gets the index of the current internal framebuffer.

This method must return the index of the current internal framebuffer (where the rendered content will be stored).

Returns

The index of the framebuffer used for rendering.

Implements LFramebuffer.

texture()

LTexture * texture ( Int32  index = 0 ) const

overridevirtualnoexcept

Gets the OpenGL texture ID of a specific framebuffer index.

This method must return the OpenGL texture ID associated with the specified framebuffer index or 0 if not available.

Parameters

index

The index of the framebuffer.

Returns

The OpenGL texture ID of the specified framebuffer index or 0 if not available.

Implements LFramebuffer.

setFramebufferDamage()

void setFramebufferDamage ( const LRegion *  damage )

overridevirtualnoexcept

Set the damaged region.

This method sets the region in surface coordinates that indicates the parts of the framebuffer that have changed since the last painting was performed.

Parameters

damage

A pointer to the LRegion object representing the changed region.

Implements LFramebuffer.

transform()

LTransform transform ( ) const

overridevirtualnoexcept

Gets the framebuffer transform.

Implements LFramebuffer.