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///
/// Defines the part of the screen/render target that is rendered to.
///
#[derive(Debug, Copy, Clone, PartialEq)]
pub struct Viewport {
    /// The distance in pixels from the left edge of the screen/render target.
    pub x: i32,
    /// The distance in pixels from the top edge of the screen/render target.
    pub y: i32,
    /// The width of the viewport.
    pub width: u32,
    /// The height of the viewport.
    pub height: u32,
}

impl Viewport {
    ///
    /// New viewport which starts at origo (x and y are both zero).
    ///
    pub fn new_at_origo(width: u32, height: u32) -> Self {
        Self {
            x: 0,
            y: 0,
            width,
            height,
        }
    }

    ///
    /// Returns the aspect ratio of this viewport.
    ///
    pub fn aspect(&self) -> f32 {
        self.width as f32 / self.height as f32
    }
}