//! The official renderer for iced.
#![cfg_attr(docsrs, feature(doc_auto_cfg))]
#[cfg(feature = "wgpu")]
pub use iced_wgpu as wgpu;

pub mod fallback;

pub use iced_graphics as graphics;
pub use iced_graphics::core;

#[cfg(feature = "geometry")]
pub use iced_graphics::geometry;

/// The default graphics renderer for [`iced`].
///
/// [`iced`]: https://github.com/iced-rs/iced
pub type Renderer = renderer::Renderer;

/// The default graphics compositor for [`iced`].
///
/// [`iced`]: https://github.com/iced-rs/iced
pub type Compositor = renderer::Compositor;

#[cfg(all(feature = "wgpu", feature = "tiny-skia"))]
mod renderer {
    use crate::core::renderer;
    use crate::core::{Color, Font, Pixels, Size};

    pub type Renderer = crate::fallback::Renderer<
        iced_wgpu::Renderer,
        iced_tiny_skia::Renderer,
    >;

    pub type Compositor = crate::fallback::Compositor<
        iced_wgpu::window::Compositor,
        iced_tiny_skia::window::Compositor,
    >;

    impl renderer::Headless for Renderer {
        fn new(default_font: Font, default_text_size: Pixels) -> Self {
            Self::Secondary(iced_tiny_skia::Renderer::new(
                default_font,
                default_text_size,
            ))
        }

        fn screenshot(
            &mut self,
            size: Size<u32>,
            scale_factor: f32,
            background_color: Color,
        ) -> Vec<u8> {
            match self {
                crate::fallback::Renderer::Primary(_) => unreachable!(
                    "iced_wgpu does not support headless mode yet!"
                ),
                crate::fallback::Renderer::Secondary(renderer) => {
                    renderer.screenshot(size, scale_factor, background_color)
                }
            }
        }
    }
}

#[cfg(all(feature = "wgpu", not(feature = "tiny-skia")))]
mod renderer {
    pub type Renderer = iced_wgpu::Renderer;
    pub type Compositor = iced_wgpu::window::Compositor;
}

#[cfg(all(not(feature = "wgpu"), feature = "tiny-skia"))]
mod renderer {
    pub type Renderer = iced_tiny_skia::Renderer;
    pub type Compositor = iced_tiny_skia::window::Compositor;
}

#[cfg(not(any(feature = "wgpu", feature = "tiny-skia")))]
mod renderer {
    #[cfg(not(debug_assertions))]
    compile_error!(
        "Cannot compile `iced_renderer` in release mode \
        without a renderer feature enabled. \
        Enable either the `wgpu` or `tiny-skia` feature, or both."
    );

    pub type Renderer = ();
    pub type Compositor = ();
}