Introduce custom backend-specific primitives

wgpu/src/backend.rs

@@ -2,7 +2,8 @@ use crate::core;
 use crate::core::{Color, Font, Point, Size};
 use crate::graphics::backend;
 use crate::graphics::color;
-use crate::graphics::{Primitive, Transformation, Viewport};
+use crate::graphics::{Transformation, Viewport};
+use crate::primitive::{self, Primitive};
 use crate::quad;
 use crate::text;
 use crate::triangle;
@@ -334,6 +335,10 @@ impl Backend {
     }
 }
 
+impl crate::graphics::Backend for Backend {
+    type Primitive = primitive::Custom;
+}
+
 impl backend::Text for Backend {
     const ICON_FONT: Font = Font::with_name("Iced-Icons");
     const CHECKMARK_ICON: char = '\u{f00c}';

wgpu/src/geometry.rs

@@ -5,10 +5,10 @@ use crate::graphics::geometry::fill::{self, Fill};
 use crate::graphics::geometry::{
     LineCap, LineDash, LineJoin, Path, Stroke, Style, Text,
 };
-use crate::graphics::primitive::{self, Primitive};
-use crate::graphics::Gradient;
+use crate::graphics::gradient::{self, Gradient};
+use crate::graphics::primitive;
+use crate::Primitive;
 
-use iced_graphics::gradient;
 use lyon::geom::euclid;
 use lyon::tessellation;
 use std::borrow::Cow;

wgpu/src/layer.rs

@@ -12,8 +12,9 @@ use crate::core;
 use crate::core::alignment;
 use crate::core::{Color, Font, Point, Rectangle, Size, Vector};
 use crate::graphics::color;
-use crate::graphics::{Primitive, Viewport};
+use crate::graphics::Viewport;
 use crate::quad::{self, Quad};
+use crate::Primitive;
 
 /// A group of primitives that should be clipped together.
 #[derive(Debug)]
@@ -262,13 +263,7 @@ impl<'a> Layer<'a> {
                     current_layer,
                 );
             }
-            _ => {
-                // Not supported!
-                log::warn!(
-                    "Unsupported primitive in `iced_wgpu`: {:?}",
-                    primitive
-                );
-            }
+            Primitive::Custom(()) => {}
         }
     }
 }

wgpu/src/lib.rs

@@ -24,8 +24,8 @@
     html_logo_url = "https://raw.githubusercontent.com/iced-rs/iced/9ab6923e943f784985e9ef9ca28b10278297225d/docs/logo.svg"
 )]
 #![deny(
-    missing_debug_implementations,
-    missing_docs,
+    //missing_debug_implementations,
+    //missing_docs,
     unsafe_code,
     unused_results,
     clippy::extra_unused_lifetimes,
@@ -47,6 +47,7 @@ pub mod geometry;
 mod backend;
 mod buffer;
 mod color;
+mod primitive;
 mod quad;
 mod text;
 mod triangle;
@@ -60,6 +61,7 @@ pub use wgpu;
 
 pub use backend::Backend;
 pub use layer::Layer;
+pub use primitive::Primitive;
 pub use settings::Settings;
 
 #[cfg(any(feature = "image", feature = "svg"))]

wgpu/src/primitive.rs

@@ -0,0 +1,3 @@
+pub type Primitive = crate::graphics::Primitive<Custom>;
+
+pub type Custom = ();

wgpu/src/window/compositor.rs

@@ -3,8 +3,8 @@ use crate::core::{Color, Size};
 use crate::graphics;
 use crate::graphics::color;
 use crate::graphics::compositor;
-use crate::graphics::{Error, Primitive, Viewport};
-use crate::{Backend, Renderer, Settings};
+use crate::graphics::{Error, Viewport};
+use crate::{Backend, Primitive, Renderer, Settings};
 
 use futures::stream::{self, StreamExt};