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WindowServer+LibGUI: Allow changing whether windows have alpha channels.

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Use this in Terminal to tell the window server to not bother with the alpha
channel in the backing store if we're running without transparency.
Semi-transparent terminals look neat but they slow everything down, so this
keeps things fast while making it easy to switch to the flashy mode. :^)
This commit is contained in:
Andreas Kling 2019-05-03 21:07:16 +02:00
parent 2470fdcd9b
commit 6a5d92f0ad
9 changed files with 65 additions and 2 deletions
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17
LibGUI/GWindow.cpp
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@ -386,8 +386,23 @@ void GWindow::set_automatic_cursor_tracking_widget(GWidget* widget)
void GWindow::set_has_alpha_channel(bool value)
{
ASSERT(!m_window_id);
if (m_has_alpha_channel == value)
return;
m_has_alpha_channel = value;
if (!m_window_id)
return;
m_pending_paint_event_rects.clear();
m_back_bitmap = nullptr;
m_front_bitmap = nullptr;
WSAPI_ClientMessage message;
message.type = WSAPI_ClientMessage::Type::SetWindowHasAlphaChannel;
message.window_id = m_window_id;
message.value = value;
GEventLoop::current().sync_request(message, WSAPI_ServerMessage::DidSetWindowHasAlphaChannel);
update();
}
void GWindow::set_double_buffering_enabled(bool value)