Plugin refactor, moving scene from game to plugin.

1 files changed, 31 insertions, 28 deletions

diff --git a/gltfview/src/plugins/plugin.h b/gltfview/src/plugins/plugin.h
index 0e0e12c..a2632cd 100644
--- a/gltfview/src/plugins/plugin.h
+++ b/gltfview/src/plugins/plugin.h
@@ -1,21 +1,5 @@
 /*
  * Game plugin.
- *
- * A game plugin exposes three functions:
- * - boot(): called once when the plugin is first loaded during the lifetime of
- * the game.
- * - init() -> state: creates and returns the plugin's state.
- * - update(state): takes and updates the state, possibly with side effects.
- * - render(): performs custom rendering.
- *
- * boot() is convenient for one-time initialization of the scene.
- *
- * init() is called every time the plugin is loaded. It is assumed that the
- * plugin's state is encapsulated in the object returned.
- *
- * update() updates the plugin state and has side effects on the scene. It is
- * assumed that update does not reference any global, mutable state outside of
- * the scene and the plugin state returned by init().
  */
 #pragma once
 
@@ -28,22 +12,41 @@
 
 typedef struct State State;
 
-/// Initialize the plugin's state.
-State* init(Game*);
+/// Initialize the plugin, which may optionally return a state object.
+///
+/// This function is called every time the plugin is (re)loaded.
+///
+/// It is assumed that the plugin's state is fully encapsulated in the returned
+/// state object. The plugin should not store any (mutable) state outside of the
+/// returned state object (e.g., no mutable global variables.)
+bool init(Game*, State**);
+
+/// Shut down the plugin.
+///
+/// This function is called before the plugin is unloaded.
+///
+/// The plugin should perform any destruction needed, but not free the state
+/// object; freeing the state object's memory is handled by the caller.
+void shutdown(Game*, State*);
 
 /// Function called the first time the plugin is loaded throughout the
-/// application's lifetime. Allows the plugin to do one-time initialization of
-/// the game state.
-bool boot(State*, Game*);
+/// application's lifetime. This allows the plugin to do one-time initialization
+/// of the game state.
+bool boot(Game*, State*);
 
 /// Update the plugin's and the game's state.
-void update(State*, Game*, double t, double dt);
+void update(Game*, State*, double t, double dt);
 
-/// Optional plugin rendering hook.
-void render(State*, const Game*);
+/// Render hook.
+void render(const Game*, const State*);
+
+/// Called when the game's window is resized.
+void resize(Game* game, State* state, int width, int height);
 
 // Signatures for the plugin's exposed functions.
-typedef void* (*plugin_init)(Game*);
-typedef bool (*plugin_boot)(State*, Game*);
-typedef void (*plugin_update)(State*, Game*, double t, double dt);
-typedef void (*plugin_render)(State*, const Game*);
+typedef bool (*plugin_init)(Game*, State**);
+typedef bool (*plugin_shutdown)(Game*, State*);
+typedef bool (*plugin_boot)(Game*, State*);
+typedef void (*plugin_update)(Game*, State*, double t, double dt);
+typedef void (*plugin_render)(const Game*, const State*);
+typedef void (*plugin_resize)(Game* game, State* state, int width, int height);