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WindowServer: Add IPC endpoint to get the color under cursor

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This allows any client to ask the WindowServer to give it the color
of the screen bitmap under the cursor.

There's currently no way to get the screen bitmap *without* the
cursor already drawn on it, so for now we just take a pixel
beside the actual cursor position to avoid just getting the cursors
color.
This commit is contained in:
Mustafa Quraish 2021-09-03 23:14:37 -04:00 • committed by Andreas Kling
parent 3da4fdd0eb
commit 69d708fb21
3 changed files with 12 additions and 0 deletions
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10
Userland/Services/WindowServer/ClientConnection.cpp
View file

@ -1048,6 +1048,16 @@ Messages::WindowServer::GetScreenBitmapAroundCursorResponse ClientConnection::ge
return { {} };
}
Messages::WindowServer::GetColorUnderCursorResponse ClientConnection::get_color_under_cursor()
{
// FIXME: Add a mechanism to get screen bitmap without cursor, so we don't have to do this
// manual translation to avoid sampling the color on the actual cursor itself.
auto cursor_location = ScreenInput::the().cursor_location().translated(-1, -1);
auto& screen_with_cursor = ScreenInput::the().cursor_location_screen();
auto color = Compositor::the().color_at_position({}, screen_with_cursor, cursor_location);
return color;
}
Messages::WindowServer::IsWindowModifiedResponse ClientConnection::is_window_modified(i32 window_id)
{
auto it = m_windows.find(window_id);