#include "Framebuffer.h"
#include <iostream>

Framebuffer::Framebuffer() 
{
	glGenFramebuffers(1, &Id);
	glBindFramebuffer(GL_FRAMEBUFFER, Id);

	// Create a colour texture!
	glGenTextures(1, &ColourAttachment);
	glBindTexture(GL_TEXTURE_2D, ColourAttachment);

	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 800, 600, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);

	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	
	glBindTexture(GL_TEXTURE_2D, 0);

	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, ColourAttachment, 0);



	// Create a depth buffer 
	glGenTextures(1, &DepthAttachment);
	glBindTexture(GL_TEXTURE_2D, DepthAttachment);

	glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, 800, 600, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, NULL);
	
	glBindTexture(GL_TEXTURE_2D, 0);

	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, DepthAttachment, 0);


	/*
	* // Render buffer 
		glGenRenderbuffers(1, &DepthAttachment);
		glBindRenderbuffer(GL_RENDERBUFFER, DepthAttachment);

		glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, 800, 600);


		glBindRenderbuffer(GL_RENDERBUFFER, 0);
		
		glFramebufferRenderbuffer(GL_RENDERBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, DepthAttachment);

	*/
	
	



	if (!glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE)
	{
		std::cout << "Framebuffer is incomplete!" << std::endl;
	}
	else {
		std::cout << "Framebuffer is complete!" << std::endl;
	}

	glBindFramebuffer(GL_FRAMEBUFFER, 0);
	

}

Framebuffer::~Framebuffer() 
{
	glDeleteTextures(1, &ColourAttachment);
	glDeleteRenderbuffers(1, &DepthAttachment);
	glDeleteFramebuffers(1, &Id);
}