Remove trait-specific draw logic in iced_native

wgpu/src/backend.rs

@@ -8,7 +8,6 @@ use iced_graphics::font;
 use iced_graphics::layer::Layer;
 use iced_graphics::{Primitive, Viewport};
 use iced_native::alignment;
-use iced_native::mouse;
 use iced_native::{Font, Size};
 
 #[cfg(any(feature = "image_rs", feature = "svg"))]
@@ -28,6 +27,7 @@ pub struct Backend {
     image_pipeline: image::Pipeline,
 
     default_text_size: u16,
+    primitive: Primitive,
 }
 
 impl Backend {
@@ -60,6 +60,7 @@ impl Backend {
             image_pipeline,
 
             default_text_size: settings.default_text_size,
+            primitive: Primitive::None,
         }
     }
 
@@ -67,16 +68,16 @@ impl Backend {
     ///
     /// The text provided as overlay will be rendered on top of the primitives.
     /// This is useful for rendering debug information.
-    pub fn draw<T: AsRef<str>>(
+    pub fn present<T: AsRef<str>>(
         &mut self,
         device: &wgpu::Device,
         staging_belt: &mut wgpu::util::StagingBelt,
         encoder: &mut wgpu::CommandEncoder,
         frame: &wgpu::TextureView,
+        primitive: &Primitive,
         viewport: &Viewport,
-        (primitive, mouse_interaction): &(Primitive, mouse::Interaction),
         overlay_text: &[T],
-    ) -> mouse::Interaction {
+    ) {
         log::debug!("Drawing");
 
         let target_size = viewport.physical_size();
@@ -102,8 +103,6 @@ impl Backend {
 
         #[cfg(any(feature = "image_rs", feature = "svg"))]
         self.image_pipeline.trim_cache();
-
-        *mouse_interaction
     }
 
     fn flush(

wgpu/src/window/compositor.rs

@@ -1,7 +1,7 @@
 use crate::{Backend, Color, Error, Renderer, Settings, Viewport};
 
 use futures::task::SpawnExt;
-use iced_native::{futures, mouse};
+use iced_native::futures;
 use raw_window_handle::HasRawWindowHandle;
 
 /// A window graphics backend for iced powered by `wgpu`.
@@ -132,15 +132,14 @@ impl iced_graphics::window::Compositor for Compositor {
         );
     }
 
-    fn draw<T: AsRef<str>>(
+    fn present<T: AsRef<str>>(
         &mut self,
         renderer: &mut Self::Renderer,
         surface: &mut Self::Surface,
         viewport: &Viewport,
         background_color: Color,
-        output: &<Self::Renderer as iced_native::Renderer>::Output,
         overlay: &[T],
-    ) -> Result<mouse::Interaction, iced_graphics::window::SurfaceError> {
+    ) -> Result<(), iced_graphics::window::SurfaceError> {
         match surface.get_current_frame() {
             Ok(frame) => {
                 let mut encoder = self.device.create_command_encoder(
@@ -180,15 +179,17 @@ impl iced_graphics::window::Compositor for Compositor {
                         depth_stencil_attachment: None,
                     });
 
-                let mouse_interaction = renderer.backend_mut().draw(
-                    &mut self.device,
-                    &mut self.staging_belt,
-                    &mut encoder,
-                    view,
-                    viewport,
-                    output,
-                    overlay,
-                );
+                renderer.present(|backend, primitive| {
+                    backend.present(
+                        &mut self.device,
+                        &mut self.staging_belt,
+                        &mut encoder,
+                        view,
+                        primitive,
+                        viewport,
+                        overlay,
+                    );
+                });
 
                 // Submit work
                 self.staging_belt.finish();
@@ -202,7 +203,7 @@ impl iced_graphics::window::Compositor for Compositor {
 
                 self.local_pool.run_until_stalled();
 
-                Ok(mouse_interaction)
+                Ok(())
             }
             Err(error) => match error {
                 wgpu::SurfaceError::Timeout => {