frameBuffer.cpp

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#include "frameBuffer.h"
 
namespace samurai
{
    namespace GL
    {
 
        void PikaFramebuffer::createFramebuffer(unsigned int w, unsigned int h)
        {
            glGenFramebuffers(1, &fbo);
            glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 
            glGenTextures(1, &texture);
            glBindTexture(GL_TEXTURE_2D, texture);
 
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
 
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
            glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
 
            //glDrawBuffer(GL_COLOR_ATTACHMENT0); //todo look into this function
 
            //glGenTextures(1, &depthtTexture); //todo add depth stuff
            //glBindTexture(GL_TEXTURE_2D, depthtTexture);
 
            //glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32, w, h, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, NULL);
 
            //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
            //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 
            //glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthtTexture, 0);
 
            glBindTexture(GL_TEXTURE_2D, 0);
            glBindFramebuffer(GL_FRAMEBUFFER, 0);
 
        }
 
        void PikaFramebuffer::deleteFramebuffer()
        {
            if (fbo)
            {
                glDeleteFramebuffers(1, &fbo);
                fbo = 0;
            }
 
            if (texture)
            {
                glDeleteTextures(1, &texture);
                texture = 0;
            }
        }
 
        void PikaFramebuffer::resizeFramebuffer(unsigned int w, unsigned int h)
        {
            glBindTexture(GL_TEXTURE_2D, texture);
            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
 
            //glBindTexture(GL_TEXTURE_2D, depthtTexture);
            //glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
            
            glBindTexture(GL_TEXTURE_2D, 0);
        }
 
    }
 
 
}