Controller for the post process effects in your application. More...

#include <PostProcessor.h>

Collaboration diagram for PostProcessor:

Public Member Functions
	PostProcessor ()
	ctor
	PostProcessor (int _w, int _h, GLuint _vao)
	arg ctor
	~PostProcessor ()
	dtor
void	init ()
	initialize the post processor
void	addEffect (const std::string &_effectName, Effect _e)
	add a user effect to the post process chain
void	start ()
	start the postprocess chain
void	finish ()
	end the postprocessor
void	doEffect (const std::string &_effectName)
	explcict call to invoke effect
GLuint	getFinalComposite ()
	return the last drawn effect
Private Attributes
GLuint	m_finalComposite
	the most recently drawn effect
ScreenQuad	m_screenQuad
	the full screen quad
std::map< std::string, Effect >	m_effects
	the effects chain
int	m_width
	fbo w/h
int	m_height
FrameBufferObject	m_fbo
	the post process fbo
GLuint	m_vao
	the quad vao
int	m_currentAttachment
	the index of the current effect

Detailed Description

Controller for the post process effects in your application.

Definition at line 17 of file PostProcessor.h.

Constructor & Destructor Documentation

PostProcessor::PostProcessor ( ) [inline]

ctor

Definition at line 21 of file PostProcessor.h.

{}

PostProcessor::PostProcessor	(	int	_w,
		int	_h,
		GLuint	_vao
	)

arg ctor

Parameters:

[in]	_w	fbo width
[in]	_h	fbo height
[in]	_vao	the full screen quad vao

Definition at line 6 of file PostProcessor.cpp.

References FrameBufferObject::create(), Texture::generateEmpty(), Texture::id, and m_fbo.

                                                       :
                             m_screenQuad(0.0f, 0.0f, 0.5f, 1.0f),
                             m_width(_w),
                             m_height(_h),
                             m_fbo(_w,_h),
                             m_vao(_vao),
                             m_currentAttachment(0)
{
    Texture tmp("tmp");
    tmp.generateEmpty(_w, _h);
    m_fbo.create(tmp.id);
}

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PostProcessor::~PostProcessor ( ) [inline]

dtor

Definition at line 30 of file PostProcessor.h.

{}

Member Function Documentation

void PostProcessor::addEffect	(	const std::string &	_effectName,
		Effect	_e
	)

add a user effect to the post process chain

Definition at line 19 of file PostProcessor.cpp.

References m_effects.

{
    m_effects.insert(std::pair<std::string, Effect>(_effectName, _e));
}

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void PostProcessor::doEffect ( const std::string & _effectName )

explcict call to invoke effect

Definition at line 32 of file PostProcessor.cpp.

References FrameBufferObject::activateTarget(), FrameBufferObject::bindTextureSlot(), ScreenQuad::draw(), m_currentAttachment, m_effects, m_fbo, m_finalComposite, m_screenQuad, and m_vao.

{
    m_fbo.bindTextureSlot(m_currentAttachment, m_effects[_effectName].getOutputId());
    m_fbo.activateTarget(m_currentAttachment);

    m_currentAttachment++;
    if(m_currentAttachment > 3)
        m_currentAttachment = 0;

    m_effects[_effectName].prepare();

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    m_screenQuad.draw(m_effects[_effectName].getShaderName(), m_vao);

    m_finalComposite = m_effects[_effectName].getOutputId();
}

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void PostProcessor::finish ( ) [inline]

end the postprocessor

Definition at line 42 of file PostProcessor.h.

References m_fbo, and FrameBufferObject::unbind().

{m_fbo.unbind();}

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GLuint PostProcessor::getFinalComposite ( ) [inline]

return the last drawn effect

Definition at line 48 of file PostProcessor.h.

References m_finalComposite.

{return m_finalComposite;}

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void PostProcessor::init ( )

initialize the post processor

void PostProcessor::start ( )

start the postprocess chain

Definition at line 24 of file PostProcessor.cpp.

References FrameBufferObject::bind(), and m_fbo.

{
    m_fbo.bind();

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
}

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