imagebitmap: Make ImageBitmap serializable and transferable (#37101)

According to specification ImageBitmap objects are serializable objects
and transferable objects.

https://html.spec.whatwg.org/multipage/#the-imagebitmap-interface:imagebitmap-11

Testing:
 - html/canvas/element/manual/imagebitmap/*
 - html/infrastructure/safe-passing-of-structured-data/*
 - html/webappapis/structured-clone/*
 - workers/semantics/structured-clone/*

Signed-off-by: Andrei Volykhin <andrei.volykhin@gmail.com>

components/shared/constellation/structured_data/mod.rs

@@ -10,7 +10,7 @@ mod transferable;
 
 use std::collections::HashMap;
 
-use base::id::{BlobId, DomExceptionId, DomPointId, MessagePortId};
+use base::id::{BlobId, DomExceptionId, DomPointId, ImageBitmapId, MessagePortId};
 use log::warn;
 use malloc_size_of_derive::MallocSizeOf;
 use serde::{Deserialize, Serialize};
@@ -34,6 +34,10 @@ pub struct StructuredSerializedData {
     pub ports: Option<HashMap<MessagePortId, MessagePortImpl>>,
     /// Transform streams transferred objects.
     pub transform_streams: Option<HashMap<MessagePortId, TransformStreamData>>,
+    /// Serialized image bitmap objects.
+    pub image_bitmaps: Option<HashMap<ImageBitmapId, SerializableImageBitmap>>,
+    /// Transferred image bitmap objects.
+    pub transferred_image_bitmaps: Option<HashMap<ImageBitmapId, SerializableImageBitmap>>,
 }
 
 impl StructuredSerializedData {
@@ -42,6 +46,7 @@ impl StructuredSerializedData {
             field.as_ref().is_some_and(|h| h.is_empty())
         }
         match val {
+            Transferrable::ImageBitmap => is_field_empty(&self.transferred_image_bitmaps),
             Transferrable::MessagePort => is_field_empty(&self.ports),
             Transferrable::ReadableStream => is_field_empty(&self.ports),
             Transferrable::WritableStream => is_field_empty(&self.ports),

components/shared/constellation/structured_data/serializable.rs

@@ -11,7 +11,7 @@ use std::cell::RefCell;
 use std::collections::HashMap;
 use std::path::PathBuf;
 
-use base::id::{BlobId, DomExceptionId, DomPointId};
+use base::id::{BlobId, DomExceptionId, DomPointId, ImageBitmapId};
 use malloc_size_of_derive::MallocSizeOf;
 use net_traits::filemanager_thread::RelativePos;
 use serde::{Deserialize, Serialize};
@@ -47,6 +47,8 @@ pub enum Serializable {
     DomPointReadOnly,
     /// The `DOMException` interface.
     DomException,
+    /// The `ImageBitmap` interface.
+    ImageBitmap,
 }
 
 impl Serializable {
@@ -62,6 +64,9 @@ impl Serializable {
             Serializable::DomException => {
                 StructuredSerializedData::clone_all_of_type::<DomException>
             },
+            Serializable::ImageBitmap => {
+                StructuredSerializedData::clone_all_of_type::<SerializableImageBitmap>
+            },
         }
     }
 }
@@ -312,3 +317,31 @@ impl BroadcastClone for DomException {
         Some(self.clone())
     }
 }
+
+#[derive(Clone, Debug, Deserialize, MallocSizeOf, Serialize)]
+/// A serializable version of the ImageBitmap interface.
+pub struct SerializableImageBitmap {
+    pub width: u32,
+    pub height: u32,
+    pub bitmap_data: Vec<u8>,
+}
+
+impl BroadcastClone for SerializableImageBitmap {
+    type Id = ImageBitmapId;
+
+    fn source(
+        data: &StructuredSerializedData,
+    ) -> &Option<std::collections::HashMap<Self::Id, Self>> {
+        &data.image_bitmaps
+    }
+
+    fn destination(
+        data: &mut StructuredSerializedData,
+    ) -> &mut Option<std::collections::HashMap<Self::Id, Self>> {
+        &mut data.image_bitmaps
+    }
+
+    fn clone_for_broadcast(&self) -> Option<Self> {
+        Some(self.clone())
+    }
+}

components/shared/constellation/structured_data/transferable.rs

@@ -24,6 +24,8 @@ pub struct TransformStreamData {
 /// All the DOM interfaces that can be transferred.
 #[derive(Clone, Copy, Debug, EnumIter)]
 pub enum Transferrable {
+    /// The `ImageBitmap` interface.
+    ImageBitmap,
     /// The `MessagePort` interface.
     MessagePort,
     /// The `ReadableStream` interface.