J:/Caro/C++_Coding/HierarchicalEdgeBundle/HierarchicalEdgeBundle/header/FBO.h

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#pragma once
#include <glew.h >
#include <windows.h>
#include <stdlib.h>
#include <io.h>
#include <stdio.h>
#include <vector>


class FBO
{
public:
        FBO(int g_iWidth, int g_iHeight, int numTex)
        {
                bool bit32 =true;
                GLenum FBOstatus;
                
                glGenTextures(1, &depthbuffer1);
                glBindTexture(GL_TEXTURE_2D, depthbuffer1);
                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
                glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );
                glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );  
                glTexImage2D( GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, g_iWidth, g_iHeight, 0, GL_DEPTH_COMPONENT, GL_FLOAT, 0);
                glBindTexture(GL_TEXTURE_2D, 0);
        
                tex1.resize(numTex);
                for(unsigned int i = 0; i < tex1.size(); i++)
                {
                        glGenTextures(1,&tex1[i]);
                        glBindTexture(GL_TEXTURE_2D, tex1[i]);
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
        
                        // Remove artefa3ct on the edges of the shadowmap
                        glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );
                        glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );

                        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, g_iWidth, g_iHeight, 0, GL_RGBA, GL_FLOAT, 0);
                        glBindTexture(GL_TEXTURE_2D, 0);
                }

                glGenFramebuffersEXT(1, &fbo1);
                glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo1);
                glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT ,GL_TEXTURE_2D, depthbuffer1, 0); 

                buffers.resize(tex1.size());
                for(unsigned int i = 0; i < tex1.size(); i++)
                {
                        glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT+i,GL_TEXTURE_2D, tex1[i], 0);
                        buffers[i] = GL_COLOR_ATTACHMENT0_EXT+i;
                }               
                
        
                FBOstatus = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
                if(FBOstatus != GL_FRAMEBUFFER_COMPLETE_EXT) CheckFBO(FBOstatus);
                glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
        };

        ~FBO()
        {
                glDeleteFramebuffersEXT(1, &fbo1);
                glDeleteRenderbuffersEXT(1, &depthbuffer1);
                for(unsigned int i = 0; i < tex1.size(); i++)   glDeleteTextures(1, &tex1[i]);
                tex1.clear();
        };

        void CheckFBO(GLenum FBOstatus)
        {
                if(FBOstatus == GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT)                       printf("Incomplete attachment\n");
                if(FBOstatus == GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT)       printf("Missing attachment\n");
                if(FBOstatus == GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT)       printf("Incomplete dimensions\n");
                if(FBOstatus == GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT)                       printf("Incomplete formats\n");
                if(FBOstatus == GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT)                          printf("Incomplete draw buffer\n");
                if(FBOstatus == GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT)                      printf("Incomplete read buffer\n");
                if(FBOstatus == GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT)                      printf("GL_FRAMEBUFFER_COMPLETE_EXT für Blur Effekt konnte ned benutzt werden\n");
                if(FBOstatus == GL_FRAMEBUFFER_UNSUPPORTED_EXT)                                         printf("Framebufferobjects unsupported\n");
        };

        void Bind()
        {
                glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo1); //FRAMEBUFFEROBJECT START!!!
        };

        void Unbind()
        {
                glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
        };

        void BindColorAttachementAtTextureAndEnable(unsigned int i)
        {
                glActiveTexture(GL_TEXTURE0+i);
                glBindTexture(GL_TEXTURE_2D, tex1[0]);
                glEnable(GL_TEXTURE_2D);
        };

        void BindDepthBufferAtTextureAndEnable(unsigned int i)
        {
                glActiveTexture(GL_TEXTURE0+i);
                glBindTexture(GL_TEXTURE_2D, depthbuffer1);
                glEnable(GL_TEXTURE_2D);
        };

        void DrawBuffers()
        {
                glDrawBuffers(buffers.size(), &buffers[0]);
        }

        GLuint fbo1;
        GLuint depthbuffer1;
        std::vector<GLuint> tex1;
        std::vector<GLenum> buffers;

};