avm2: Stub `flash.display.BitmapData` & storage object

core/src/avm2/globals.rs

@@ -119,6 +119,7 @@ pub struct SystemPrototypes<'gc> {
     pub soundtransform: Object<'gc>,
     pub soundchannel: Object<'gc>,
     pub bitmap: Object<'gc>,
+    pub bitmapdata: Object<'gc>,
 }
 
 impl<'gc> SystemPrototypes<'gc> {
@@ -172,6 +173,7 @@ impl<'gc> SystemPrototypes<'gc> {
             soundtransform: empty,
             soundchannel: empty,
             bitmap: empty,
+            bitmapdata: empty,
         }
     }
 }
@@ -216,6 +218,7 @@ pub struct SystemClasses<'gc> {
     pub soundtransform: Object<'gc>,
     pub soundchannel: Object<'gc>,
     pub bitmap: Object<'gc>,
+    pub bitmapdata: Object<'gc>,
 }
 
 impl<'gc> SystemClasses<'gc> {
@@ -269,6 +272,7 @@ impl<'gc> SystemClasses<'gc> {
             soundtransform: empty,
             soundchannel: empty,
             bitmap: empty,
+            bitmapdata: empty,
         }
     }
 }
@@ -802,6 +806,13 @@ pub fn load_player_globals<'gc>(
         domain,
         script
     );
+    avm2_system_class!(
+        bitmapdata,
+        activation,
+        flash::display::bitmapdata::create_class(mc),
+        domain,
+        script
+    );
 
     // package `flash.geom`
     avm2_system_class!(

core/src/avm2/globals/flash/display.rs

@@ -2,6 +2,7 @@
 
 pub mod actionscriptversion;
 pub mod bitmap;
+pub mod bitmapdata;
 pub mod capsstyle;
 pub mod displayobject;
 pub mod displayobjectcontainer;

core/src/avm2/globals/flash/display/bitmapdata.rs

@@ -0,0 +1,50 @@
+//! `flash.display.BitmapData` builtin/prototype
+
+use crate::avm2::activation::Activation;
+use crate::avm2::class::{Class, ClassAttributes};
+use crate::avm2::method::Method;
+use crate::avm2::names::{Namespace, QName};
+use crate::avm2::object::{bitmapdata_allocator, Object};
+use crate::avm2::value::Value;
+use crate::avm2::Error;
+use gc_arena::{GcCell, MutationContext};
+
+/// Implements `flash.display.BitmapData`'s instance constructor.
+pub fn instance_init<'gc>(
+    activation: &mut Activation<'_, 'gc, '_>,
+    this: Option<Object<'gc>>,
+    _args: &[Value<'gc>],
+) -> Result<Value<'gc>, Error> {
+    if let Some(this) = this {
+        activation.super_init(this, &[])?;
+    }
+
+    Ok(Value::Undefined)
+}
+
+/// Implements `flash.display.BitmapData`'s class constructor.
+pub fn class_init<'gc>(
+    _activation: &mut Activation<'_, 'gc, '_>,
+    _this: Option<Object<'gc>>,
+    _args: &[Value<'gc>],
+) -> Result<Value<'gc>, Error> {
+    Ok(Value::Undefined)
+}
+
+/// Construct `BitmapData`'s class.
+pub fn create_class<'gc>(mc: MutationContext<'gc, '_>) -> GcCell<'gc, Class<'gc>> {
+    let class = Class::new(
+        QName::new(Namespace::package("flash.media"), "BitmapData"),
+        Some(QName::new(Namespace::package(""), "Object").into()),
+        Method::from_builtin(instance_init, "<BitmapData instance initializer>", mc),
+        Method::from_builtin(class_init, "<BitmapData class initializer>", mc),
+        mc,
+    );
+
+    let mut write = class.write(mc);
+
+    write.set_attributes(ClassAttributes::SEALED);
+    write.set_instance_allocator(bitmapdata_allocator);
+
+    class
+}

core/src/avm2/object.rs

@@ -16,6 +16,7 @@ use crate::avm2::value::{Hint, Value};
 use crate::avm2::vector::VectorStorage;
 use crate::avm2::Error;
 use crate::backend::audio::{SoundHandle, SoundInstanceHandle};
+use crate::bitmap::bitmap_data::BitmapData;
 use crate::display_object::DisplayObject;
 use gc_arena::{Collect, GcCell, MutationContext};
 use ruffle_macros::enum_trait_object;
@@ -24,6 +25,7 @@ use std::fmt::Debug;
 use std::hash::{Hash, Hasher};
 
 mod array_object;
+mod bitmapdata_object;
 mod bytearray_object;
 mod class_object;
 mod custom_object;
@@ -43,6 +45,7 @@ mod vector_object;
 mod xml_object;
 
 pub use crate::avm2::object::array_object::{array_allocator, ArrayObject};
+pub use crate::avm2::object::bitmapdata_object::{bitmapdata_allocator, BitmapDataObject};
 pub use crate::avm2::object::bytearray_object::{bytearray_allocator, ByteArrayObject};
 pub use crate::avm2::object::class_object::ClassObject;
 pub use crate::avm2::object::dispatch_object::DispatchObject;
@@ -86,6 +89,7 @@ pub use crate::avm2::object::xml_object::{xml_allocator, XmlObject};
         VectorObject(VectorObject<'gc>),
         SoundObject(SoundObject<'gc>),
         SoundChannelObject(SoundChannelObject<'gc>),
+        BitmapDataObject(BitmapDataObject<'gc>),
     }
 )]
 pub trait TObject<'gc>: 'gc + Collect + Debug + Into<Object<'gc>> + Clone + Copy {
@@ -1237,6 +1241,20 @@ pub trait TObject<'gc>: 'gc + Collect + Debug + Into<Object<'gc>> + Clone + Copy
     ///
     /// This does nothing if the object is not a sound channel.
     fn set_sound_instance(self, _mc: MutationContext<'gc, '_>, _sound: SoundInstanceHandle) {}
+
+    /// Unwrap this object's bitmap data
+    fn as_bitmap_data(&self) -> Option<GcCell<'gc, BitmapData>> {
+        None
+    }
+
+    /// Initialize the bitmap data in this object, if it's capable of
+    /// supporting said data
+    fn init_bitmap_data(
+        &self,
+        _mc: MutationContext<'gc, '_>,
+        _new_bitmap: GcCell<'gc, BitmapData>,
+    ) {
+    }
 }
 
 pub enum ObjectPtr {}

core/src/avm2/object/bitmapdata_object.rs

@@ -0,0 +1,113 @@
+//! Object representation for BitmapData
+
+use crate::avm2::activation::Activation;
+use crate::avm2::class::Class;
+use crate::avm2::names::{Namespace, QName};
+use crate::avm2::object::script_object::ScriptObjectData;
+use crate::avm2::object::{Object, ObjectPtr, TObject};
+use crate::avm2::scope::Scope;
+use crate::avm2::string::AvmString;
+use crate::avm2::value::Value;
+use crate::avm2::Error;
+use crate::bitmap::bitmap_data::BitmapData;
+use crate::{
+    impl_avm2_custom_object, impl_avm2_custom_object_instance, impl_avm2_custom_object_properties,
+};
+use gc_arena::{Collect, GcCell, MutationContext};
+
+/// A class instance allocator that allocates BitmapData objects.
+pub fn bitmapdata_allocator<'gc>(
+    class: Object<'gc>,
+    proto: Object<'gc>,
+    activation: &mut Activation<'_, 'gc, '_>,
+) -> Result<Object<'gc>, Error> {
+    let base = ScriptObjectData::base_new(Some(proto), Some(class));
+
+    Ok(BitmapDataObject(GcCell::allocate(
+        activation.context.gc_context,
+        BitmapDataObjectData {
+            base,
+            bitmap_data: None,
+        },
+    ))
+    .into())
+}
+
+#[derive(Clone, Collect, Debug, Copy)]
+#[collect(no_drop)]
+pub struct BitmapDataObject<'gc>(GcCell<'gc, BitmapDataObjectData<'gc>>);
+
+#[derive(Clone, Collect, Debug)]
+#[collect(no_drop)]
+pub struct BitmapDataObjectData<'gc> {
+    /// Base script object
+    base: ScriptObjectData<'gc>,
+
+    bitmap_data: Option<GcCell<'gc, BitmapData>>,
+}
+
+impl<'gc> BitmapDataObject<'gc> {
+    pub fn from_bitmap_data(
+        activation: &mut Activation<'_, 'gc, '_>,
+        bitmap_data: GcCell<'gc, BitmapData>,
+        class: Object<'gc>,
+    ) -> Result<Object<'gc>, Error> {
+        let proto = class
+            .get_property(
+                class,
+                &QName::new(Namespace::public(), "prototype"),
+                activation,
+            )?
+            .coerce_to_object(activation)?;
+
+        let mut instance = Self(GcCell::allocate(
+            activation.context.gc_context,
+            BitmapDataObjectData {
+                base: ScriptObjectData::base_new(Some(proto), Some(class)),
+                bitmap_data: Some(bitmap_data),
+            },
+        ));
+        instance.install_instance_traits(activation, class)?;
+        class.call_native_init(Some(instance.into()), &[], activation, Some(class))?;
+
+        Ok(instance.into())
+    }
+}
+
+impl<'gc> TObject<'gc> for BitmapDataObject<'gc> {
+    impl_avm2_custom_object!(base);
+    impl_avm2_custom_object_properties!(base);
+    impl_avm2_custom_object_instance!(base);
+
+    fn derive(&self, activation: &mut Activation<'_, 'gc, '_>) -> Result<Object<'gc>, Error> {
+        let base = ScriptObjectData::base_new(Some((*self).into()), None);
+
+        Ok(BitmapDataObject(GcCell::allocate(
+            activation.context.gc_context,
+            BitmapDataObjectData {
+                base,
+                bitmap_data: None,
+            },
+        ))
+        .into())
+    }
+
+    fn to_string(&self, _mc: MutationContext<'gc, '_>) -> Result<Value<'gc>, Error> {
+        Ok(Value::Object(Object::from(*self)))
+    }
+
+    fn value_of(&self, _mc: MutationContext<'gc, '_>) -> Result<Value<'gc>, Error> {
+        Ok(Value::Object(Object::from(*self)))
+    }
+
+    /// Unwrap this object's bitmap data
+    fn as_bitmap_data(&self) -> Option<GcCell<'gc, BitmapData>> {
+        self.0.read().bitmap_data
+    }
+
+    /// Initialize the bitmap data in this object, if it's capable of
+    /// supporting said data
+    fn init_bitmap_data(&self, mc: MutationContext<'gc, '_>, new_bitmap: GcCell<'gc, BitmapData>) {
+        self.0.write(mc).bitmap_data = Some(new_bitmap)
+    }
+}