core: Track PlaceObject's ratio on DisplayObject

This patch sets PlaceObject's ratio on DisplayObject as it's also used
for rewind logic. By itself this patch does not change how rewinds work.

This is pulled from ruffle-rs#21336 as a
low-risk patch.

Co-authored-by: Mike Welsh <mwelsh@gmail.com>
Co-authored-by: jarca0123 <11705208+jarca0123@users.noreply.github.com>

Author: 3 people

core/src/display_object.rs

@@ -238,6 +238,7 @@ pub struct DisplayObjectBase<'gc> {
     parent: Lock<Option<DisplayObject<'gc>>>,
     place_frame: Cell<u16>,
     depth: Cell<Depth>,
+    ratio: Cell<u16>,
     name: Lock<Option<AvmString<'gc>>>,
     clip_depth: Cell<Depth>,
 
@@ -316,6 +317,7 @@ impl Default for DisplayObjectBase<'_> {
             parent: Default::default(),
             place_frame: Default::default(),
             depth: Default::default(),
+            ratio: Default::default(),
             name: Lock::new(None),
             clip_depth: Default::default(),
             matrix: Default::default(),
@@ -1686,6 +1688,20 @@ pub trait TDisplayObject<'gc>:
         self.set_scale_y(Percent::from_unit(new_scale_y));
     }
 
+    #[no_dynamic]
+    fn ratio(self) -> u16 {
+        self.base().ratio.get()
+    }
+
+    #[no_dynamic]
+    fn set_ratio(self, context: &mut UpdateContext<'gc>, ratio: u16) {
+        self.base().ratio.set(ratio);
+        self.invalidate_cached_bitmap();
+        self.on_ratio_changed(context, ratio);
+    }
+
+    fn on_ratio_changed(self, _context: &mut UpdateContext<'gc>, _new_ratio: u16) {}
+
     /// The opacity of this display object.
     /// 1 is fully opaque.
     /// Returned by the `_alpha`/`alpha` ActionScript properties.
@@ -2427,11 +2443,7 @@ pub trait TDisplayObject<'gc>:
                 }
             }
             if let Some(ratio) = place_object.ratio {
-                if let Some(morph_shape) = self.as_morph_shape() {
-                    morph_shape.set_ratio(ratio);
-                } else if let Some(video) = self.as_video() {
-                    video.seek(context, ratio.into());
-                }
+                self.set_ratio(context, ratio);
             }
             if let Some(is_bitmap_cached) = place_object.is_bitmap_cached {
                 self.set_bitmap_cached_preference(is_bitmap_cached);

core/src/display_object/morph_shape.rs

@@ -11,7 +11,7 @@ use gc_arena::lock::Lock;
 use gc_arena::{Collect, Gc, Mutation};
 use ruffle_render::backend::ShapeHandle;
 use ruffle_render::commands::CommandHandler;
-use std::cell::{Cell, RefCell, RefMut};
+use std::cell::{RefCell, RefMut};
 use std::sync::Arc;
 use swf::{Fixed16, Fixed8};
 
@@ -35,7 +35,6 @@ pub struct MorphShapeData<'gc> {
     shared: Lock<Gc<'gc, MorphShapeShared>>,
     /// The AVM2 representation of this MorphShape.
     object: Lock<Option<Avm2StageObject<'gc>>>,
-    ratio: Cell<u16>,
 }
 
 impl<'gc> MorphShape<'gc> {
@@ -50,20 +49,10 @@ impl<'gc> MorphShape<'gc> {
             MorphShapeData {
                 base: Default::default(),
                 shared: Lock::new(Gc::new(gc_context, shared)),
-                ratio: Cell::new(0),
                 object: Lock::new(None),
             },
         ))
     }
-
-    pub fn ratio(self) -> u16 {
-        self.0.ratio.get()
-    }
-
-    pub fn set_ratio(self, ratio: u16) {
-        self.0.ratio.set(ratio);
-        self.invalidate_cached_bitmap();
-    }
 }
 
 impl<'gc> TDisplayObject<'gc> for MorphShape<'gc> {
@@ -117,7 +106,7 @@ impl<'gc> TDisplayObject<'gc> for MorphShape<'gc> {
     }
 
     fn render_self(self, context: &mut RenderContext) {
-        let ratio = self.0.ratio.get();
+        let ratio = self.ratio();
         let shared = self.0.shared.get();
         let shape_handle = shared.get_shape(context, context.library, ratio);
         context
@@ -126,7 +115,7 @@ impl<'gc> TDisplayObject<'gc> for MorphShape<'gc> {
     }
 
     fn self_bounds(self) -> Rectangle<Twips> {
-        let ratio = self.0.ratio.get();
+        let ratio = self.ratio();
         let shared = self.0.shared.get();
         let frame = shared.get_frame(ratio);
         frame.bounds

core/src/display_object/video.rs

@@ -454,6 +454,10 @@ impl<'gc> TDisplayObject<'gc> for Video<'gc> {
         }
     }
 
+    fn on_ratio_changed(self, context: &mut UpdateContext<'gc>, new_ratio: u16) {
+        self.seek(context, new_ratio.into());
+    }
+
     fn id(self) -> CharacterId {
         match self.0.source.get() {
             VideoSource::Swf(swf_source) => swf_source.streamdef.id,