void FrameBufferObject::setSize(unsigned int width, unsigned height)
{
if (initialized)
{
this->width = width;
this->height = height;
if(enableDepth)
initDepthBuffer();
if(enableColor)
initColorBuffer();
}
}
void fbo::initFrameBuffer(void){
initDepthBuffer(); // Initialize our frame buffer depth buffer
initTextureBuffer(); // Initialize our frame buffer texture
glGenFramebuffersEXT(1, &id); // Generate one frame buffer and store the ID in fbo
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, id); // Bind our frame buffer
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, texture_id, 0); // Attach the texture fbo_texture to the color buffer in our frame buffer
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, depth_id); // Attach the depth buffer fbo_depth to our frame buffer
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT); // Check that status of our generated frame buffer
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) // If the frame buffer does not report back as complete
{
std::cout << "Couldn't create frame buffer" << std::endl; // Output an error to the console
}
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); // Unbind our frame buffer
}
void FrameBufferObject::init(unsigned int width, unsigned height)
{
if (!initialized)
{
this->width = width;
this->height = height;
glGenFramebuffersEXT(1, &id);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, id);
if(enableDepth)
{
createDepthBuffer();
initDepthBuffer();
//choice between rendering depth into a texture or a renderbuffer
if(depthTexture)
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, depthTextureID, 0);
else
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, depthTextureID);
}
if(enableColor)
{
createColorBuffer();
initColorBuffer();
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, colorTextureID, 0);
}
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_defaultWindowFramebufferID);
if(enableColor)
{
glDrawBuffer(GL_BACK);
glReadBuffer(GL_BACK);;
}
#ifdef _DEBUG
checkFBO();
#endif
initialized=true;
glDisable(GL_TEXTURE_2D);
}
else
setSize(width, height);
}
