Renderer

src/render.rs

@@ -0,0 +1,41 @@
+use std::{fmt::Debug, sync::Arc};
+
+pub trait DrawInstruction: Debug {}
+
+#[derive(Debug, Clone)]
+pub struct Size {
+    pub width: u16,
+    pub height: u16,
+}
+
+#[derive(Debug, Clone)]
+pub struct DrawContext {
+    pub available: Size,
+    pub used: Size,
+    pub drawing: Vec<Arc<dyn DrawInstruction>>,
+}
+
+#[derive(Debug, Clone)]
+pub struct RenderContext {}
+
+impl DrawContext {
+    pub fn new(width: u16, height: u16) -> Self {
+        Self {
+            available: Size { width, height },
+            used: Size {
+                width: 0,
+                height: 0,
+            },
+            drawing: Vec::new(),
+        }
+    }
+
+    pub fn allocate(&mut self, width: u16, height: u16) {
+        self.used.width += width;
+        self.used.height += height;
+    }
+
+    pub fn draw<I: DrawInstruction + 'static>(&mut self, inst: I) {
+        self.drawing.push(Arc::new(inst));
+    }
+}