use std::{fmt::Display, str::FromStr}; use gemini_engine::elements::{    containers::CanShade,    view::{ColChar, Colour, Modifier},    Pixel,}; #[derive(Debug, Clone, Copy)]pub enum MultiShader {    None,    Invert,    FlatColour(Colour),    Solid,} impl Display for MultiShader {    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {        write!(f, "{}", format!("{self:?}").to_lowercase())    }} impl FromStr for MultiShader {    type Err = String;     fn from_str(s: &str) -> Result<Self, Self::Err> {        match s {            "none" => Ok(Self::None),            "invert" => Ok(Self::Invert),            s if s.starts_with("flat-") => {                let colour: Colour = s.replace("flat-", "").parse()?;                 Ok(Self::FlatColour(colour))            }            "solid" => Ok(Self::Solid),            _ => Err(String::from("Invalid shader name")),        }    }} impl CanShade for MultiShader {    fn shade(&mut self, pixel: Pixel) -> Pixel {        match self {            Self::None => pixel,            Self::Invert => {                let modifier = match pixel.fill_char.modifier {                    Modifier::Colour(colour) => {                        Modifier::from_rgb(255 - colour.r, 255 - colour.g, 255 - colour.b)                    }                    _ => Modifier::from_rgb(0, 0, 0),                };                 Pixel::new(pixel.pos, ColChar::new(pixel.fill_char.text_char, modifier))            }            Self::FlatColour(colour) => Pixel::new(                pixel.pos,                ColChar::new(pixel.fill_char.text_char, Modifier::Colour(*colour)),            ),            Self::Solid => Pixel::new(pixel.pos, ColChar::SOLID.with_mod(pixel.fill_char.modifier)),        }    }}