OSDL: OSDL::Rendering::VideoRenderer Class Reference

Its rendering is mainly triggered by the root renderer, if it exists and if this video renderer has been registered to this root renderer.

Specialized video renderers can take in charge for example multiple viewports and cameras, BSP trees, etc.

Definition at line 41 of file OSDLVideoRenderer.h.


Public Member Functions
	VideoRenderer (bool registerToRootRenderer=true) throw ( RenderingException )
	Constructs a new video renderer.
virtual	~VideoRenderer () throw ()
	Virtual destructor, no view is destroyed.
virtual void	render (Events::RenderingTick currentRenderingTick=0) throw ()
	Triggers the actual video rendering of all views, for specified rendering tick, if any.
virtual void	onRenderingSkipped (Events::RenderingTick skippedRenderingTick) throw ()
	Allows the video renderer to be aware that a rendering step has to be skipped.
virtual const std::string	toString (Ceylan::VerbosityLevels level=Ceylan::high) const throw ()
	Returns an user-friendly description of the state of this object.
Static Public Member Functions
static bool	HasExistingRootRenderer () throw ()
	Tells whether a root renderer is available.
static Renderer &	GetExistingRootRenderer () throw ( RenderingException )
	Returns the one and only one root renderer instance that may be already available.
static void	DeleteExistingRootRenderer () throw ( RenderingException )
	Deletes the existing root renderer.
static void	DeleteRootRenderer () throw ()
	Deletes the root renderer, if any.
Protected Attributes
RenderCount	_renderingDone
	Counts the number of renderings achieved.
RenderCount	_renderingSkipped
	Counts the number of renderings skipped.
Events::RenderingTick	_lastRender
	Records the last rendering tick.
Private Member Functions
	VideoRenderer (const VideoRenderer &source) throw ()
	Copy constructor made private to ensure that it will never be called.
VideoRenderer &	operator= (const VideoRenderer &source) throw ()
	Assignment operator made private to ensure that it will never be called.

Constructor & Destructor Documentation

VideoRenderer::VideoRenderer ( bool registerToRootRenderer = true ) throw ( RenderingException ) [explicit]

Constructs a new video renderer.

Parameters:

registerToRootRenderer

iff true, this video renderer will register itself automatically to the root renderer, which must implement the MultimediaRenderer interface so that this video renderer can be plugged.

Exceptions:

RenderingException

if registerToRootRenderer is true and no root renderer is available, or if the root renderer is not able to register video renderers (which means it is not a Multimedia renderer).

See also:: MultimediaRenderer

Definition at line 37 of file OSDLVideoRenderer.cc.

VideoRenderer::~VideoRenderer ( ) throw () [virtual]

Virtual destructor, no view is destroyed.

Definition at line 80 of file OSDLVideoRenderer.cc.

OSDL::Rendering::VideoRenderer::VideoRenderer ( const VideoRenderer & source ) throw () [private]

Copy constructor made private to ensure that it will never be called.

The compiler should complain whenever this undefined constructor is called, implicitly or not.

Member Function Documentation

void VideoRenderer::render ( Events::RenderingTick currentRenderingTick = 0 ) throw () [virtual]

Triggers the actual video rendering of all views, for specified rendering tick, if any.

Parameters:

currentRenderingTick

the rendering tick corresponding to this render step.

If the renderer is called from a basic event loop (no scheduler is used), then the rendering tick is meaningless and is always zero.

Reimplemented from OSDL::Rendering::Renderer.

Definition at line 115 of file OSDLVideoRenderer.cc.

References OSDL_VIDEO_RENDER_LOG.

void VideoRenderer::onRenderingSkipped ( Events::RenderingTick skippedRenderingTick ) throw () [virtual]

Allows the video renderer to be aware that a rendering step has to be skipped.

It may be a chance for it to trigger counter-measures, such as decreasing the level of detail in order not to slow down the whole process.

Parameters:

skippedRenderingTick

the rendering tick that had to be skipped.

Reimplemented from OSDL::Rendering::Renderer.

Definition at line 130 of file OSDLVideoRenderer.cc.

References OSDL_VIDEO_RENDER_LOG.

const string VideoRenderer::toString ( Ceylan::VerbosityLevels level = Ceylan::high ) const throw () [virtual]

Returns an user-friendly description of the state of this object.

Parameters:

level

the requested verbosity level.

Note:: Text output format is determined from overall settings.

See also:: Ceylan::TextDisplayable

Reimplemented from OSDL::Rendering::Renderer.

Definition at line 141 of file OSDLVideoRenderer.cc.

References OSDL::Video::Pixels::toString().

VideoRenderer& OSDL::Rendering::VideoRenderer::operator= ( const VideoRenderer & source ) throw () [private]

Assignment operator made private to ensure that it will never be called.

The compiler should complain whenever this undefined operator is called, implicitly or not.

bool Renderer::HasExistingRootRenderer ( ) throw () [static, inherited]

Tells whether a root renderer is available.

Returns:: true iff a root renderer is already available.

Definition at line 123 of file OSDLRenderer.cc.

References OSDL::Rendering::Renderer::_internalRootRenderer.

Referenced by OSDL::Events::EventsModule::enterBasicMainLoop().

Renderer & Renderer::GetExistingRootRenderer ( ) throw ( RenderingException ) [static, inherited]

Returns the one and only one root renderer instance that may be already available.

Note:: The returned value is a reference and not a pointer, to avoid any abnormal deallocation by its users, that should never deallocate the root renderer.

Exceptions:

RenderingException

if there is no root renderer already available.

Note:: There is no 'GetRootRenderer' method that would create a root renderer if none was already set, since various renderers could be chosen as the root one.

Definition at line 131 of file OSDLRenderer.cc.

References OSDL::Rendering::Renderer::_internalRootRenderer.

Referenced by OSDL::Events::EventsModule::enterBasicMainLoop().

void Renderer::DeleteExistingRootRenderer ( ) throw ( RenderingException ) [static, inherited]

Deletes the existing root renderer.

Exceptions:

RenderingException

if not renderer was available.

Definition at line 142 of file OSDLRenderer.cc.

References OSDL::Rendering::Renderer::_internalRootRenderer.

void Renderer::DeleteRootRenderer ( ) throw () [static, inherited]

Deletes the root renderer, if any.