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LibWeb+WebContent: Use anonymous files for OOPWV backing stores

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To support this, the GUI process and the WebContent service will now
coordinate their backing store bitmaps. Each backing store can be
referred to by a serial ID, and we don't need to keep resending it
as a file descriptor.

We should probably do something similar in WindowServer. :^)
This commit is contained in:
Andreas Kling 2021-01-16 23:15:32 +01:00
parent 04b2aeef33
commit b5d98c0945
7 changed files with 52 additions and 32 deletions
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27
Userland/Libraries/LibWeb/OutOfProcessWebView.cpp
View file

@ -97,21 +97,33 @@ void OutOfProcessWebView::resize_event(GUI::ResizeEvent& event)
client().post_message(Messages::WebContentServer::SetViewportRect(Gfx::IntRect({ horizontal_scrollbar().value(), vertical_scrollbar().value() }, available_size())));
m_front_bitmap = nullptr;
m_back_bitmap = nullptr;
if (m_front_bitmap) {
m_front_bitmap = nullptr;
client().post_message(Messages::WebContentServer::RemoveBackingStore(m_front_bitmap_id));
}
if (m_back_bitmap) {
m_back_bitmap = nullptr;
client().post_message(Messages::WebContentServer::RemoveBackingStore(m_back_bitmap_id));
}
m_front_bitmap_id = -1;
m_back_bitmap_id = -1;
m_has_usable_bitmap = false;
if (available_size().is_empty())
return;
if (auto new_bitmap = Gfx::Bitmap::create_shareable(Gfx::BitmapFormat::RGB32, available_size())) {
new_bitmap->shared_buffer()->share_with(client().server_pid());
m_front_bitmap = move(new_bitmap);
m_front_bitmap_id = m_next_bitmap_id++;
client().post_message(Messages::WebContentServer::AddBackingStore(m_front_bitmap_id, m_front_bitmap->to_shareable_bitmap()));
}
if (auto new_bitmap = Gfx::Bitmap::create_shareable(Gfx::BitmapFormat::RGB32, available_size())) {
new_bitmap->shared_buffer()->share_with(client().server_pid());
m_back_bitmap = move(new_bitmap);
m_back_bitmap_id = m_next_bitmap_id++;
client().post_message(Messages::WebContentServer::AddBackingStore(m_back_bitmap_id, m_back_bitmap->to_shareable_bitmap()));
}
request_repaint();
@ -144,11 +156,12 @@ void OutOfProcessWebView::theme_change_event(GUI::ThemeChangeEvent& event)
request_repaint();
}
void OutOfProcessWebView::notify_server_did_paint(Badge<WebContentClient>, i32 shbuf_id)
void OutOfProcessWebView::notify_server_did_paint(Badge<WebContentClient>, i32 bitmap_id)
{
if (m_back_bitmap->shbuf_id() == shbuf_id) {
if (m_back_bitmap_id == bitmap_id) {
m_has_usable_bitmap = true;
swap(m_back_bitmap, m_front_bitmap);
swap(m_back_bitmap_id, m_front_bitmap_id);
update();
}
}
@ -246,7 +259,7 @@ void OutOfProcessWebView::request_repaint()
// it won't have a back bitmap yet, so we can just skip repaint requests.
if (!m_back_bitmap)
return;
client().post_message(Messages::WebContentServer::Paint(m_back_bitmap->rect().translated(horizontal_scrollbar().value(), vertical_scrollbar().value()), m_back_bitmap->shbuf_id()));
client().post_message(Messages::WebContentServer::Paint(m_back_bitmap->rect().translated(horizontal_scrollbar().value(), vertical_scrollbar().value()), m_back_bitmap_id));
}
WebContentClient& OutOfProcessWebView::client()