Implement `iced_glutin` :tada:

4 files changed, 32 insertions, 0 deletions

diff --git a/graphics/Cargo.toml b/graphics/Cargo.toml
index 12ad3f14..675bcb60 100644
--- a/graphics/Cargo.toml
+++ b/graphics/Cargo.toml
@@ -9,6 +9,7 @@ canvas = ["lyon"]
 font-source = ["font-kit"]
 font-fallback = []
 font-icons = []
+opengl = []
 
 [dependencies]
 bytemuck = "1.2"
diff --git a/graphics/src/layer.rs b/graphics/src/layer.rs
index 916b5c83..59b792f0 100644
--- a/graphics/src/layer.rs
+++ b/graphics/src/layer.rs
@@ -6,6 +6,7 @@ use crate::{
     Vector, VerticalAlignment, Viewport,
 };
 
+#[derive(Debug, Clone)]
 pub struct Layer<'a> {
     pub bounds: Rectangle,
     pub quads: Vec<Quad>,
diff --git a/graphics/src/window.rs b/graphics/src/window.rs
index a7c8911b..380efb8c 100644
--- a/graphics/src/window.rs
+++ b/graphics/src/window.rs
@@ -1,3 +1,9 @@
 mod compositor;
 
+#[cfg(feature = "opengl")]
+mod gl_compositor;
+
 pub use compositor::Compositor;
+
+#[cfg(feature = "opengl")]
+pub use gl_compositor::GLCompositor;
diff --git a/graphics/src/window/gl_compositor.rs b/graphics/src/window/gl_compositor.rs
new file mode 100644
index 00000000..979d891e
--- /dev/null
+++ b/graphics/src/window/gl_compositor.rs
@@ -0,0 +1,24 @@
+use crate::{Size, Viewport};
+use iced_native::mouse;
+
+use core::ffi::c_void;
+
+pub trait GLCompositor: Sized {
+    type Renderer: iced_native::Renderer;
+    type Settings: Default;
+
+    unsafe fn new(
+        settings: Self::Settings,
+        loader_function: impl FnMut(&str) -> *const c_void,
+    ) -> (Self, Self::Renderer);
+
+    fn resize_viewport(&mut self, physical_size: Size<u32>);
+
+    fn draw<T: AsRef<str>>(
+        &mut self,
+        renderer: &mut Self::Renderer,
+        viewport: &Viewport,
+        output: &<Self::Renderer as iced_native::Renderer>::Output,
+        overlay: &[T],
+    ) -> mouse::Interaction;
+}