init commit

A basic window is available.  Now we shall try to render texts and
some auxiliary functionalities.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/renderer/backend.rs b/src/renderer/backend.rs
new file mode 100644
index 0000000..0aa994a
--- /dev/null
+++ b/src/renderer/backend.rs
@@ -0,0 +1,13 @@
+use winit::application::ApplicationHandler;
+
+use super::text::TextSpan;
+
+/// Trait that all renderer backends must implement.
+pub trait RendererBackend: ApplicationHandler {
+    fn name(&self) -> &str;
+    fn init(&mut self, width: i32, height: i32) -> bool;
+    fn clear(&mut self);
+    fn draw_text(&mut self, span: &TextSpan);
+    fn present(&mut self);
+    fn shutdown(&mut self);
+}