1 files changed, 33 insertions, 0 deletions
diff --git a/src/style.rs b/src/style.rs
new file mode 100644
index 0000000..028a06b
--- /dev/null
+++ b/src/style.rs
@@ -0,0 +1,33 @@
+/// The color type that is used by all the backend
+#[derive(Clone, Copy)]
+pub struct BackendColor {
+    pub alpha: f64,
+    pub rgb: (u8, u8, u8),
+}
+
+impl BackendColor {
+    #[inline(always)]
+    pub fn mix(&self, alpha: f64) -> Self {
+        Self {
+            alpha: self.alpha * alpha,
+            rgb: self.rgb,
+        }
+    }
+}
+
+/// The style data for the backend drawing API
+pub trait BackendStyle {
+    /// Get the color of current style
+    fn color(&self) -> BackendColor;
+
+    /// Get the stroke width of current style
+    fn stroke_width(&self) -> u32 {
+        1
+    }
+}
+
+impl BackendStyle for BackendColor {
+    fn color(&self) -> BackendColor {
+        *self
+    }
+}