1 files changed, 42 insertions, 0 deletions
diff --git a/src/style/font/mod.rs b/src/style/font/mod.rs
new file mode 100644
index 0000000..99c3ca6
--- /dev/null
+++ b/src/style/font/mod.rs
@@ -0,0 +1,42 @@
+/// The implementation of an actual font implementation
+///
+/// This exists since for the image rendering task, we want to use
+/// the system font. But in wasm application, we want the browser
+/// to handle all the font issue.
+///
+/// Thus we need different mechanism for the font implementation
+
+#[cfg(all(not(target_arch = "wasm32"), feature = "ttf"))]
+mod ttf;
+#[cfg(all(not(target_arch = "wasm32"), feature = "ttf"))]
+use ttf::FontDataInternal;
+
+#[cfg(all(not(target_arch = "wasm32"), not(feature = "ttf")))]
+mod naive;
+#[cfg(all(not(target_arch = "wasm32"), not(feature = "ttf")))]
+use naive::FontDataInternal;
+
+#[cfg(target_arch = "wasm32")]
+mod web;
+#[cfg(target_arch = "wasm32")]
+use web::FontDataInternal;
+
+mod font_desc;
+pub use font_desc::*;
+
+pub type LayoutBox = ((i32, i32), (i32, i32));
+
+pub trait FontData: Clone {
+    type ErrorType: Sized + std::error::Error + Clone;
+    fn new(family: FontFamily, style: FontStyle) -> Result<Self, Self::ErrorType>;
+    fn estimate_layout(&self, size: f64, text: &str) -> Result<LayoutBox, Self::ErrorType>;
+    fn draw<E, DrawFunc: FnMut(i32, i32, f32) -> Result<(), E>>(
+        &self,
+        _pos: (i32, i32),
+        _size: f64,
+        _text: &str,
+        _draw: DrawFunc,
+    ) -> Result<Result<(), E>, Self::ErrorType> {
+        panic!("The font implementation is unable to draw text");
+    }
+}