Split Fill and Stroke into their own modules

wgpu/src/widget/canvas/fill.rs

@@ -0,0 +1,12 @@
+use iced_native::Color;
+
+#[derive(Debug, Clone, Copy)]
+pub enum Fill {
+    Color(Color),
+}
+
+impl Default for Fill {
+    fn default() -> Fill {
+        Fill::Color(Color::BLACK)
+    }
+}

wgpu/src/widget/canvas/stroke.rs

@@ -0,0 +1,66 @@
+use iced_native::Color;
+
+#[derive(Debug, Clone, Copy)]
+pub struct Stroke {
+    pub color: Color,
+    pub width: f32,
+    pub line_cap: LineCap,
+    pub line_join: LineJoin,
+}
+
+impl Default for Stroke {
+    fn default() -> Stroke {
+        Stroke {
+            color: Color::BLACK,
+            width: 1.0,
+            line_cap: LineCap::default(),
+            line_join: LineJoin::default(),
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy)]
+pub enum LineCap {
+    Butt,
+    Square,
+    Round,
+}
+
+impl Default for LineCap {
+    fn default() -> LineCap {
+        LineCap::Butt
+    }
+}
+
+impl From<LineCap> for lyon::tessellation::LineCap {
+    fn from(line_cap: LineCap) -> lyon::tessellation::LineCap {
+        match line_cap {
+            LineCap::Butt => lyon::tessellation::LineCap::Butt,
+            LineCap::Square => lyon::tessellation::LineCap::Square,
+            LineCap::Round => lyon::tessellation::LineCap::Round,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy)]
+pub enum LineJoin {
+    Miter,
+    Round,
+    Bevel,
+}
+
+impl Default for LineJoin {
+    fn default() -> LineJoin {
+        LineJoin::Miter
+    }
+}
+
+impl From<LineJoin> for lyon::tessellation::LineJoin {
+    fn from(line_join: LineJoin) -> lyon::tessellation::LineJoin {
+        match line_join {
+            LineJoin::Miter => lyon::tessellation::LineJoin::Miter,
+            LineJoin::Round => lyon::tessellation::LineJoin::Round,
+            LineJoin::Bevel => lyon::tessellation::LineJoin::Bevel,
+        }
+    }
+}