postProcessor

gistfile1.txt

PostProcessor::PostProcessor(teShader* shader, GLuint width, GLuint height)
	: myShader(shader), myTexture(), myWidth(width), myHeight(height), Confuse(GL_FALSE), Chaos(GL_FALSE), Shake(GL_FALSE)
{
	/*
	Framebuffer MSFBO has:
	 - RenderBufferStorageMultisample RBO_Color
	 - RenderbufferStorageMultisample RBO_Depth

	Framebuffer FBO has:
	 - FramebufferTexture2D myTexture.ID
	*/

	// Initialize renderbuffer/framebuffer object
	glGenFramebuffers(1, &this->myMSFBO);
	glGenRenderbuffers(1, &this->myRBO_Color);
	glGenRenderbuffers(1, &this->myRBO_Depth);

	glGenFramebuffers(1, &this->myFBO);


	// Initialize renderbuffer storage with a multisampled color buffer (don't need a depth/stencil buffer)
	glBindFramebuffer(GL_FRAMEBUFFER, this->myMSFBO);

	glBindRenderbuffer(GL_RENDERBUFFER, this->myRBO_Color);
	glRenderbufferStorageMultisample(GL_RENDERBUFFER, 4, GL_RGB, width, height); // Allocate storage for render buffer object

	glBindRenderbuffer(GL_RENDERBUFFER, this->myRBO_Depth);
	glRenderbufferStorageMultisample(GL_RENDERBUFFER, 4, GL_DEPTH_COMPONENT24, width, height);

	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, this->myRBO_Color); // Attach MS render buffer object to framebuffer
	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,  GL_RENDERBUFFER, this->myRBO_Depth); // Attach MS render buffer object to framebuffer
	
	if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
		std::cout << "ERROR::POSTPROCESSOR: Failed to initialize MSFBO" << std::endl;
	else
		std::cout << "PostProcessor MSFBO creation complete\n";



	// Also initialize the FBO/texture to blit multisampled color-buffer to; used for shader operations (for postprocessing effects)
	glBindFramebuffer(GL_FRAMEBUFFER, this->myFBO);
	this->myTexture.Generate(width, height, NULL);
	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, this->myTexture.ID, 0); // Attach texture to framebuffer as its color attachment
	if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
		std::cout << "ERROR::POSTPROCESSOR: Failed to initialize FBO" << std::endl;
	else
		std::cout << "PostProcessor FBO creation complete\n";