Skip to content

Add ImageDecoderInit.transfer #696

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Jul 6, 2023
Merged

Add ImageDecoderInit.transfer #696

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
59 changes: 37 additions & 22 deletions index.src.html
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4795,29 +4795,34 @@

When invoked, run these steps:
1. If |init| is not [=valid ImageDecoderInit=], throw a {{TypeError}}.
2. Let |d| be a new {{ImageDecoder}} object. In the steps below, all
2. If |init|.{{ImageDecoderInit/transfer}} contains more than one reference
to the same {{ArrayBuffer}}, then throw a {{DataCloneError}} {{DOMException}}.
3. For each |transferable| in |init|.{{ImageDecoderInit/transfer}}:
1. If {{platform object/[[Detached]]}} internal slot is `true`,
then throw a {{DataCloneError}} {{DOMException}}.
4. Let |d| be a new {{ImageDecoder}} object. In the steps below, all
mentions of {{ImageDecoder}} members apply to |d| unless stated
otherwise.
3. Assign a new [=queue=] to {{ImageDecoder/[[control message queue]]}}.
4. Assign `false` to {{ImageDecoder/[[message queue blocked]]}}.
5. Assign the result of starting a new [=parallel queue=] to
5. Assign a new [=queue=] to {{ImageDecoder/[[control message queue]]}}.
6. Assign `false` to {{ImageDecoder/[[message queue blocked]]}}.
7. Assign the result of starting a new [=parallel queue=] to
{{ImageDecoder/[[codec work queue]]}}.
6. Assign {{ImageDecoder/[[ImageTrackList]]}} a new {{ImageTrackList}}
8. Assign {{ImageDecoder/[[ImageTrackList]]}} a new {{ImageTrackList}}
initialized as follows:
1. Assign a new [=list=] to {{ImageTrackList/[[track list]]}}.
2. Assign `-1` to {{ImageTrackList/[[selected index]]}}.
7. Assign {{ImageDecoderInit/type}} to {{ImageDecoder/[[type]]}}.
8. Assign `null` to {{ImageDecoder/[[codec implementation]]}}.
9. If `init.preferAnimation` [=map/exists=], assign `init.preferAnimation`
9. Assign {{ImageDecoderInit/type}} to {{ImageDecoder/[[type]]}}.
10. Assign `null` to {{ImageDecoder/[[codec implementation]]}}.
11. If `init.preferAnimation` [=map/exists=], assign `init.preferAnimation`
to the {{ImageDecoder/[[prefer animation]]}} internal slot. Otherwise,
assign 'null' to {{ImageDecoder/[[prefer animation]]}} internal slot.
10. Assign a new [=list=] to {{ImageDecoder/[[pending decode promises]]}}.
11. Assign `-1` to {{ImageDecoder/[[internal selected track index]]}}.
12. Assign `false` to {{ImageDecoder/[[tracks established]]}}.
13. Assign `false` to {{ImageDecoder/[[closed]]}}.
14. Assign a new [=map=] to {{ImageDecoder/[[progressive frame
12. Assign a new [=list=] to {{ImageDecoder/[[pending decode promises]]}}.
13. Assign `-1` to {{ImageDecoder/[[internal selected track index]]}}.
14. Assign `false` to {{ImageDecoder/[[tracks established]]}}.
15. Assign `false` to {{ImageDecoder/[[closed]]}}.
16. Assign a new [=map=] to {{ImageDecoder/[[progressive frame
generations]]}}.
15. If |init|'s {{ImageDecoderInit/data}} member is of type
17. If |init|'s {{ImageDecoderInit/data}} member is of type
{{ReadableStream}}:
1. Assign a new [=list=] to {{ImageDecoder/[[encoded data]]}}.
2. Assign `false` to {{ImageDecoder/[[complete]]}}
Expand All @@ -4828,16 +4833,25 @@
{{ImageDecoderInit/data}}.
6. In parallel, perform the [=Fetch Stream Data Loop=] on |d| with
|reader|.
16. Otherwise:
18. Otherwise:
1. Assert that `init.data` is of type {{BufferSource}}.
2. Assign a copy of `init.data` to {{ImageDecoder/[[encoded data]]}}.
3. Assign `true` to {{ImageDecoder/[[complete]]}}.
4. Reslove {{ImageDecoder/[[completed promise]]}}.
5. Queue a control message to [=configure the image decoder=] with
2. If |init|.{{ImageDecoderInit/transfer}} contains an {{ArrayBuffer}}
referenced by |init|.{{ImageDecoderInit/data}} the User Agent
<em class="rfc2119">MAY</em> choose to:
1. Let {{ImageDecoder/[[encoded data]]}} reference bytes in |data|
representing an encoded image.
3. Otherwise:
1. Assign a copy of `init.data` to {{ImageDecoder/[[encoded data]]}}.
4. Assign `true` to {{ImageDecoder/[[complete]]}}.
5. Resolve {{ImageDecoder/[[completed promise]]}}.
6. Queue a control message to [=configure the image decoder=] with
|init|.
6. Queue a control message to [=decode track metadata=].
7. [=Process the control message queue=].
17. return |d|.
7. Queue a control message to [=decode track metadata=].
8. [=Process the control message queue=].
19. For each |transferable| in |init|.{{ImageDecoderInit/transfer}}:
1. Perform [DetachArrayBuffer](https://tc39.es/ecma262/#sec-detacharraybuffer)
on |transferable|
20. return |d|.

[=Running a control message=] to <dfn>configure the image decoder</dfn>
means running these steps:
Expand Down Expand Up @@ -5263,6 +5277,7 @@
[EnforceRange] unsigned long desiredWidth;
[EnforceRange] unsigned long desiredHeight;
boolean preferAnimation;
sequence<ArrayBuffer> transfer = [];
};
</xmp>
</pre>
Expand Down