Draft support for dynamic custom renderer injection

renderer/src/geometry/cache.rs

@@ -1,4 +1,5 @@
 use crate::core::Size;
+use crate::custom;
 use crate::geometry::{Frame, Geometry};
 use crate::Renderer;
 
@@ -29,6 +30,7 @@ enum Internal {
     TinySkia(Arc<iced_tiny_skia::Primitive>),
     #[cfg(feature = "wgpu")]
     Wgpu(Arc<iced_wgpu::Primitive>),
+    Custom(Arc<dyn custom::Geometry>),
 }
 
 impl Cache {
@@ -82,6 +84,9 @@ impl Cache {
                             content: primitive.clone(),
                         });
                     }
+                    Internal::Custom(geometry) => {
+                        return Geometry::Custom(geometry.clone().load())
+                    }
                 }
             }
         }
@@ -100,6 +105,9 @@ impl Cache {
                 Geometry::Wgpu(primitive) => {
                     Internal::Wgpu(Arc::new(primitive))
                 }
+                Geometry::Custom(geometry) => {
+                    Internal::Custom(geometry.cache())
+                }
             }
         };
 
@@ -120,6 +128,7 @@ impl Cache {
                     content: primitive,
                 })
             }
+            Internal::Custom(geometry) => Geometry::Custom(geometry.load()),
         }
     }
 }