Scaffold iced_tiny_skia and connect it to iced_renderer

tiny_skia/src/window/compositor.rs

@@ -0,0 +1,96 @@
+use crate::{Backend, Color, Error, Renderer, Settings, Viewport};
+
+use iced_graphics::window::compositor::{self, Information, SurfaceError};
+use iced_graphics::Primitive;
+
+use raw_window_handle::{HasRawDisplayHandle, HasRawWindowHandle};
+use std::marker::PhantomData;
+
+pub struct Compositor<Theme> {
+    _theme: PhantomData<Theme>,
+}
+
+pub struct Surface;
+
+impl<Theme> iced_graphics::window::Compositor for Compositor<Theme> {
+    type Settings = Settings;
+    type Renderer = Renderer<Theme>;
+    type Surface = Surface;
+
+    fn new<W: HasRawWindowHandle + HasRawDisplayHandle>(
+        settings: Self::Settings,
+        _compatible_window: Option<&W>,
+    ) -> Result<(Self, Self::Renderer), Error> {
+        let (compositor, backend) = new(settings);
+
+        Ok((compositor, Renderer::new(backend)))
+    }
+
+    fn create_surface<W: HasRawWindowHandle + HasRawDisplayHandle>(
+        &mut self,
+        _window: &W,
+    ) -> Surface {
+        // TODO
+        Surface
+    }
+
+    fn configure_surface(
+        &mut self,
+        _surface: &mut Surface,
+        _width: u32,
+        _height: u32,
+    ) {
+        // TODO
+    }
+
+    fn fetch_information(&self) -> Information {
+        Information {
+            adapter: String::from("CPU"),
+            backend: String::from("tiny-skia"),
+        }
+    }
+
+    fn present<T: AsRef<str>>(
+        &mut self,
+        renderer: &mut Self::Renderer,
+        surface: &mut Self::Surface,
+        viewport: &Viewport,
+        background_color: Color,
+        overlay: &[T],
+    ) -> Result<(), SurfaceError> {
+        renderer.with_primitives(|backend, primitives| {
+            present(
+                self,
+                backend,
+                surface,
+                primitives,
+                viewport,
+                background_color,
+                overlay,
+            )
+        })
+    }
+}
+
+pub fn new<Theme>(settings: Settings) -> (Compositor<Theme>, Backend) {
+    // TODO
+    (
+        Compositor {
+            _theme: PhantomData,
+        },
+        Backend::new(settings),
+    )
+}
+
+pub fn present<Theme, T: AsRef<str>>(
+    _compositor: &mut Compositor<Theme>,
+    _backend: &mut Backend,
+    _surface: &mut Surface,
+    _primitives: &[Primitive],
+    _viewport: &Viewport,
+    _background_color: Color,
+    _overlay: &[T],
+) -> Result<(), compositor::SurfaceError> {
+    // TODO
+    Ok(())
+}