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use generational_arena::Index;
use rin::graphics;
use std::fmt::{self, Debug};

#[derive(Clone,Copy,Debug,Component,Eq,PartialEq, Ord, PartialOrd)]
#[debug_as_string]
pub struct ProgramRef(Index);

impl ProgramRef {
    pub fn new(index: Index) -> ProgramRef {
        ProgramRef(index)
    }
}


#[derive(OneToNComponent)]
#[debug_as_string]
pub struct RenderPlane{
    pub fbo: glin::Fbo,
    pub camera_ubo: glin::Buffer<graphics::mvp::CameraData>
}

impl<'a> glin::OffscreenBuffer for &'a RenderPlane{
    type ColorAttach = glin::fbo::ColorAttachment;
    type DepthAttach = glin::fbo::DepthAttachment;

    fn render_buffer(&self) -> &glin::Fbo{
        &self.fbo
    }

    fn color_attachment(&self, idx: usize) -> Option<&glin::fbo::ColorAttachment>{
        self.fbo.color_attachment(idx)
    }

    fn depth_attachment(&self) -> Option<&glin::fbo::DepthAttachment>{
        self.fbo.depth_attachment()
    }
}

impl Debug for RenderPlane{
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result{
        fmt.debug_struct("mutiny::renderer::RenderPlane")
            .field("fbo", &self.fbo.id())
            .field("camera_ubo", &self.camera_ubo.id())
            .finish()
    }
}