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pub use self::{
    camera::Camera,
    manager::GraphicsManager,
    mesh::{Mesh, MeshBuilder},
    shaders::{Program, Shader},
    sprites::{Sprite, SpriteSheet},
};
use gl;
use maths::Vector2u;
use std::cmp::Ordering;

mod batches;
mod camera;
mod manager;
mod mesh;
mod shaders;
mod sprites;

///ID of loaded OpenGL Texture
pub type TextureID = gl::types::GLuint;

///ID of loaded OpenGL Program
pub type ProgramID = gl::types::GLuint;

///Represents a texture loaded in OpenGL.
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub struct Texture {
    id: TextureID,
    size: Vector2u,
}

impl PartialOrd for Texture {
    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
        Some(self.cmp(other))
    }
}

impl Ord for Texture {
    fn cmp(&self, other: &Self) -> Ordering {
        self.id.cmp(&other.id)
    }
}

impl Texture {
    pub fn id(&self) -> TextureID {
        self.id
    }

    pub fn size(&self) -> Vector2u {
        self.size
    }

    pub fn width(&self) -> u32 {
        self.size.x
    }

    pub fn height(&self) -> u32 {
        self.size.y
    }
}