Added support for custom shader widget for iced_wgpu backend.

widget/Cargo.toml

@@ -20,6 +20,7 @@ image = ["iced_renderer/image"]
 svg = ["iced_renderer/svg"]
 canvas = ["iced_renderer/geometry"]
 qr_code = ["canvas", "qrcode"]
+wgpu = []
 
 [dependencies]
 iced_renderer.workspace = true

widget/src/lib.rs

@@ -97,6 +97,9 @@ pub use tooltip::Tooltip;
 #[doc(no_inline)]
 pub use vertical_slider::VerticalSlider;
 
+#[cfg(feature = "wgpu")]
+pub use renderer::widget::shader::{self, Shader};
+
 #[cfg(feature = "svg")]
 pub mod svg;