initial arhitectural overhaul

Signed-off-by: Sienna Meridian Satterwhite <sienna@r3t.io>

crates/libmarathon/src/platform/ios/swift/PencilBridge.h

@@ -0,0 +1,43 @@
+/**
+ * C header for Rust-Swift interop
+ *
+ * This defines the interface between Rust and Swift.
+ * Both sides include this header to ensure they agree on data types.
+ */
+
+#ifndef PENCIL_BRIDGE_H
+#define PENCIL_BRIDGE_H
+
+#include <stdint.h>
+
+/**
+ * Raw pencil data from iOS UITouch
+ *
+ * This struct uses C types that both Rust and Swift understand.
+ * The memory layout must match exactly on both sides.
+ */
+typedef struct {
+    float x;          // Screen X in points
+    float y;          // Screen Y in points
+    float force;      // Pressure (0.0 - 4.0)
+    float altitude;   // Angle from screen (radians)
+    float azimuth;    // Rotation angle (radians)
+    double timestamp; // iOS system timestamp
+    uint8_t phase;    // 0=began, 1=moved, 2=ended
+} RawPencilPoint;
+
+/**
+ * Called from Swift when a pencil point is captured
+ *
+ * This is implemented in Rust (pencil_bridge.rs)
+ */
+void pencil_point_received(RawPencilPoint point);
+
+/**
+ * Attach pencil capture to a UIView
+ *
+ * This is implemented in Swift (PencilCapture.swift)
+ */
+void swift_attach_pencil_capture(void* view);
+
+#endif