tests: Add a library defining the file format for Ruffle test input.

I intend to share this code across both Ruffle and FlashTAS (another project that allows running input tests on Flash Player), hence why it's a separate library from Ruffle's tests crate.

Cargo.lock

@@ -2987,6 +2987,13 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "ruffle-input-format"
+version = "0.1.0"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "ruffle_core"
 version = "0.1.0"

Cargo.toml

@@ -16,6 +16,7 @@ members = [
     "render/webgl",
 
     "tests",
+    "tests/input-format",
 ]
 resolver = "2"
 

tests/input-format/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "ruffle-input-format"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+serde = { version = "1.0.136", features = ["derive"] }

tests/input-format/src/lib.rs

@@ -0,0 +1,40 @@
+use serde::{Deserialize, Serialize};
+
+/// Position of a mouse cursor on the screen.
+///
+/// Mouse cursor positions are sized relative to the Flash stage's dimensions,
+/// regardless of the native window's size or pixel density. For example, a
+/// (640x480) stage movie on a 2x display (on platforms that report physical
+/// pixels) or at 2x the size will see mouse clicks at its bottom right corner
+/// on (1280x960), relative to the window. That coordinate needs to be scaled
+/// down to match the desired stage.
+#[derive(Serialize, Deserialize)]
+pub struct MousePosition(f64, f64);
+
+/// Which mouse button is being pressed or released.
+#[derive(Serialize, Deserialize)]
+pub enum MouseButton {
+    Left,
+    Middle,
+    Right,
+}
+
+/// All automated event types supported by FlashTAS.
+///
+/// A FlashTAS input file consists of a string of `AutomatedEvent`s which are
+/// played back by FlashTAS.
+#[derive(Serialize, Deserialize)]
+pub enum AutomatedEvent {
+    /// End the current frame's input and wait for the next frame before
+    /// continuing to inject input.
+    Wait,
+
+    /// Move the mouse to a new cursor position.
+    MouseMove(MousePosition),
+
+    /// Click a mouse button.
+    MouseDown(MousePosition, MouseButton),
+
+    /// Release a mouse button.
+    MouseUp(MousePosition, MouseButton),
+}