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WindowServer: Add initial support for rendering on multiple screens

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This allows WindowServer to use multiple framebuffer devices and
compose the desktop with any arbitrary layout. Currently, it is assumed
that it is configured contiguous and non-overlapping, but this should
eventually be enforced.

To make rendering efficient, each window now also tracks on which
screens it needs to be rendered. This way we don't have to iterate all
the windows for each screen but instead use the same rendering loop and
then only render to the screen (or screens) that the window actually
uses.
This commit is contained in:
Tom 2021-06-13 06:16:06 -06:00 • committed by Andreas Kling
parent 499c33ae0c
commit 4392da970a
42 changed files with 1127 additions and 563 deletions
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10
Userland/Services/WindowServer/WindowManager.h
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@ -79,7 +79,7 @@ public:
void notify_progress_changed(Window&);
void notify_modified_changed(Window&);
Gfx::IntRect maximized_window_rect(Window const&) const;
Gfx::IntRect maximized_window_rect(Window const&, bool relative_to_window_screen = false) const;
ClientConnection const* dnd_client() const { return m_dnd_client.ptr(); }
String const& dnd_text() const { return m_dnd_text; }
@ -105,8 +105,8 @@ public:
void move_to_front_and_make_active(Window&);
Gfx::IntRect desktop_rect() const;
Gfx::IntRect arena_rect_for_type(WindowType) const;
Gfx::IntRect desktop_rect(Screen&) const;
Gfx::IntRect arena_rect_for_type(Screen&, WindowType) const;
Cursor const& active_cursor() const;
Cursor const& hidden_cursor() const { return *m_hidden_cursor; }
@ -129,9 +129,7 @@ public:
Gfx::Font const& font() const;
Gfx::Font const& window_title_font() const;
bool set_resolution(int width, int height, int scale);
Gfx::IntSize resolution() const;
int scale_factor() const;
bool set_resolution(Screen&, int width, int height, int scale);
void set_acceleration_factor(double);
void set_scroll_step_size(unsigned);