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//! Color modification for a [`Surface`].

use crate::color::Rgb;
use crate::{bind, Sdl};

use super::{RawSurface, Surface};

/// A color modified [`Surface`].
#[derive(Debug)]
pub struct ColorMod<S> {
    surface: S,
    color: Rgb,
}

impl<S> ColorMod<S> {
    /// Returns the color modification value.
    pub fn color(&self) -> &Rgb {
        &self.color
    }
}

impl<S: Surface> ColorMod<S> {
    pub(super) fn new(surface: S, color: Rgb) -> Self {
        unsafe {
            let ret =
                bind::SDL_SetSurfaceColorMod(surface.as_ptr().as_ptr(), color.r, color.g, color.b);
            if ret != 0 {
                Sdl::error_then_panic("Setting surface color mod");
            }
        }
        Self { surface, color }
    }
}

impl<S: Surface> Surface for ColorMod<S> {
    fn as_ptr(&self) -> std::ptr::NonNull<RawSurface> {
        self.surface.as_ptr()
    }
}