Initial fullscreen support

9 files changed, 244 insertions, 38 deletions

diff --git a/include/rootston/view.h b/include/rootston/view.h
index 69034d60..e1397b89 100644
--- a/include/rootston/view.h
+++ b/include/rootston/view.h
@@ -13,6 +13,7 @@ struct roots_wl_shell_surface {
 	struct wl_listener request_move;
 	struct wl_listener request_resize;
 	struct wl_listener request_set_maximized;
+	struct wl_listener request_set_fullscreen;
 	struct wl_listener set_state;
 
 	struct wl_listener surface_commit;
@@ -26,6 +27,7 @@ struct roots_xdg_surface_v6 {
 	struct wl_listener request_move;
 	struct wl_listener request_resize;
 	struct wl_listener request_maximize;
+	struct wl_listener request_fullscreen;
 };
 
 struct roots_xwayland_surface {
@@ -54,6 +56,7 @@ struct roots_view {
 	float rotation;
 
 	bool maximized;
+	struct wlr_output *fullscreen_output;
 	struct {
 		double x, y;
 		uint32_t width, height;
@@ -93,6 +96,7 @@ struct roots_view {
 	void (*move_resize)(struct roots_view *view, double x, double y,
 		uint32_t width, uint32_t height);
 	void (*maximize)(struct roots_view *view, bool maximized);
+	void (*set_fullscreen)(struct roots_view *view, bool fullscreen);
 	void (*close)(struct roots_view *view);
 };
 
@@ -103,6 +107,8 @@ void view_resize(struct roots_view *view, uint32_t width, uint32_t height);
 void view_move_resize(struct roots_view *view, double x, double y,
 	uint32_t width, uint32_t height);
 void view_maximize(struct roots_view *view, bool maximized);
+void view_set_fullscreen(struct roots_view *view, bool fullscreen,
+	struct wlr_output *output);
 void view_close(struct roots_view *view);
 bool view_center(struct roots_view *view);
 void view_setup(struct roots_view *view);
diff --git a/include/wlr/types/wlr_output.h b/include/wlr/types/wlr_output.h
index cf000019..d382b593 100644
--- a/include/wlr/types/wlr_output.h
+++ b/include/wlr/types/wlr_output.h
@@ -64,6 +64,10 @@ struct wlr_output {
 		struct wl_signal destroy;
 	} events;
 
+	struct wlr_surface *fullscreen_surface;
+	struct wl_listener fullscreen_surface_commit;
+	struct wl_listener fullscreen_surface_destroy;
+
 	struct wl_list cursors; // wlr_output_cursor::link
 	struct wlr_output_cursor *hardware_cursor;
 
@@ -89,6 +93,8 @@ void wlr_output_swap_buffers(struct wlr_output *output);
 void wlr_output_set_gamma(struct wlr_output *output,
 	uint32_t size, uint16_t *r, uint16_t *g, uint16_t *b);
 uint32_t wlr_output_get_gamma_size(struct wlr_output *output);
+void wlr_output_set_fullscreen_surface(struct wlr_output *output,
+	struct wlr_surface *surface);
 
 struct wlr_output_cursor *wlr_output_cursor_create(struct wlr_output *output);
 bool wlr_output_cursor_set_image(struct wlr_output_cursor *cursor,
diff --git a/include/wlr/types/wlr_xdg_shell_v6.h b/include/wlr/types/wlr_xdg_shell_v6.h
index e3982003..7940deef 100644
--- a/include/wlr/types/wlr_xdg_shell_v6.h
+++ b/include/wlr/types/wlr_xdg_shell_v6.h
@@ -152,6 +152,13 @@ struct wlr_xdg_toplevel_v6_resize_event {
 	uint32_t edges;
 };
 
+struct wlr_xdg_toplevel_v6_set_fullscreen_event {
+	struct wl_client *client;
+	struct wlr_xdg_surface_v6 *surface;
+	bool fullscreen;
+	struct wlr_output *output;
+};
+
 struct wlr_xdg_toplevel_v6_show_window_menu_event {
 	struct wl_client *client;
 	struct wlr_xdg_surface_v6 *surface;
diff --git a/rootston/desktop.c b/rootston/desktop.c
index cf5a8cdc..be74b619 100644
--- a/rootston/desktop.c
+++ b/rootston/desktop.c
@@ -89,6 +89,19 @@ void view_move_resize(struct roots_view *view, double x, double y,
 	view_resize(view, width, height);
 }
 
+static struct wlr_output *view_get_output(struct roots_view *view) {
+	struct wlr_box view_box;
+	view_get_box(view, &view_box);
+
+	double output_x, output_y;
+	wlr_output_layout_closest_point(view->desktop->layout, NULL,
+		view->x + (double)view_box.width/2,
+		view->y + (double)view_box.height/2,
+		&output_x, &output_y);
+	return wlr_output_layout_output_at(view->desktop->layout, output_x,
+		output_y);
+}
+
 void view_maximize(struct roots_view *view, bool maximized) {
 	if (view->maximized == maximized) {
 		return;
@@ -109,13 +122,7 @@ void view_maximize(struct roots_view *view, bool maximized) {
 		view->saved.width = view_box.width;
 		view->saved.height = view_box.height;
 
-		double output_x, output_y;
-		wlr_output_layout_closest_point(view->desktop->layout, NULL,
-			view->x + (double)view_box.width/2,
-			view->y + (double)view_box.height/2,
-			&output_x, &output_y);
-		struct wlr_output *output = wlr_output_layout_output_at(
-			view->desktop->layout, output_x, output_y);
+		struct wlr_output *output = view_get_output(view);
 		struct wlr_box *output_box =
 			wlr_output_layout_get_box(view->desktop->layout, output);
 
@@ -133,6 +140,54 @@ void view_maximize(struct roots_view *view, bool maximized) {
 	}
 }
 
+void view_set_fullscreen(struct roots_view *view, bool fullscreen,
+		struct wlr_output *output) {
+	bool was_fullscreen = view->fullscreen_output != NULL;
+	if (was_fullscreen == fullscreen) {
+		// TODO: support changing the output?
+		return;
+	}
+
+	// TODO: check if client is focused?
+
+	if (view->set_fullscreen) {
+		view->set_fullscreen(view, fullscreen);
+	}
+
+	if (!was_fullscreen && fullscreen) {
+		if (output == NULL) {
+			output = view_get_output(view);
+		}
+
+		struct wlr_box view_box;
+		view_get_box(view, &view_box);
+
+		view->saved.x = view->x;
+		view->saved.y = view->y;
+		view->saved.rotation = view->rotation;
+		view->saved.width = view_box.width;
+		view->saved.height = view_box.height;
+
+		struct wlr_box *output_box =
+			wlr_output_layout_get_box(view->desktop->layout, output);
+		view_move_resize(view, output_box->x, output_box->y, output_box->width,
+			output_box->height);
+		view->rotation = 0;
+
+		wlr_output_set_fullscreen_surface(output, view->wlr_surface);
+		view->fullscreen_output = output;
+	}
+
+	if (was_fullscreen && !fullscreen) {
+		view_move_resize(view, view->saved.x, view->saved.y, view->saved.width,
+			view->saved.height);
+		view->rotation = view->saved.rotation;
+
+		wlr_output_set_fullscreen_surface(view->fullscreen_output, NULL);
+		view->fullscreen_output = NULL;
+	}
+}
+
 void view_close(struct roots_view *view) {
 	if (view->close) {
 		view->close(view);
diff --git a/rootston/output.c b/rootston/output.c
index 83ff37fd..35a5dac3 100644
--- a/rootston/output.c
+++ b/rootston/output.c
@@ -186,6 +186,13 @@ static void output_frame_notify(struct wl_listener *listener, void *data) {
 	wlr_output_make_current(wlr_output);
 	wlr_renderer_begin(server->renderer, wlr_output);
 
+	if (wlr_output->fullscreen_surface != NULL) {
+		wlr_renderer_end(server->renderer);
+		wlr_output_swap_buffers(wlr_output);
+		output->last_frame = desktop->last_frame = now;
+		return;
+	}
+
 	struct roots_view *view;
 	wl_list_for_each_reverse(view, &desktop->views, link) {
 		render_view(view, desktop, wlr_output, &now);
diff --git a/rootston/wl_shell.c b/rootston/wl_shell.c
index 7359c878..f285d7f6 100644
--- a/rootston/wl_shell.c
+++ b/rootston/wl_shell.c
@@ -59,6 +59,17 @@ static void handle_request_set_maximized(struct wl_listener *listener,
 	view_maximize(view, true);
 }
 
+static void handle_request_set_fullscreen(struct wl_listener *listener,
+		void *data) {
+	struct roots_wl_shell_surface *roots_surface =
+		wl_container_of(listener, roots_surface, request_set_fullscreen);
+	struct roots_view *view = roots_surface->view;
+	struct wlr_wl_shell_surface_set_fullscreen_event *e = data;
+
+	// TODO: support e->method, e->framerate
+	view_set_fullscreen(view, true, e->output);
+}
+
 static void handle_set_state(struct wl_listener *listener, void *data) {
 	struct roots_wl_shell_surface *roots_surface =
 		wl_container_of(listener, roots_surface, set_state);
@@ -68,6 +79,10 @@ static void handle_set_state(struct wl_listener *listener, void *data) {
 			surface->state != WLR_WL_SHELL_SURFACE_STATE_MAXIMIZED) {
 		view_maximize(view, false);
 	}
+	if (view->fullscreen_output != NULL &&
+			surface->state != WLR_WL_SHELL_SURFACE_STATE_FULLSCREEN) {
+		view_set_fullscreen(view, false, NULL);
+	}
 }
 
 static void handle_surface_commit(struct wl_listener *listener, void *data) {
@@ -81,6 +96,7 @@ static void handle_destroy(struct wl_listener *listener, void *data) {
 	wl_list_remove(&roots_surface->request_move.link);
 	wl_list_remove(&roots_surface->request_resize.link);
 	wl_list_remove(&roots_surface->request_set_maximized.link);
+	wl_list_remove(&roots_surface->request_set_fullscreen.link);
 	wl_list_remove(&roots_surface->set_state.link);
 	wl_list_remove(&roots_surface->surface_commit.link);
 	view_destroy(roots_surface->view);
@@ -111,6 +127,10 @@ void handle_wl_shell_surface(struct wl_listener *listener, void *data) {
 	roots_surface->request_set_maximized.notify = handle_request_set_maximized;
 	wl_signal_add(&surface->events.request_set_maximized,
 		&roots_surface->request_set_maximized);
+	roots_surface->request_set_fullscreen.notify =
+		handle_request_set_fullscreen;
+	wl_signal_add(&surface->events.request_set_fullscreen,
+		&roots_surface->request_set_fullscreen);
 	roots_surface->set_state.notify = handle_set_state;
 	wl_signal_add(&surface->events.set_state, &roots_surface->set_state);
 	roots_surface->surface_commit.notify = handle_surface_commit;
diff --git a/rootston/xdg_shell_v6.c b/rootston/xdg_shell_v6.c
index 656231c7..9017f7bd 100644
--- a/rootston/xdg_shell_v6.c
+++ b/rootston/xdg_shell_v6.c
@@ -100,6 +100,16 @@ static void maximize(struct roots_view *view, bool maximized) {
 	wlr_xdg_toplevel_v6_set_maximized(surface, maximized);
 }
 
+static void set_fullscreen(struct roots_view *view, bool fullscreen) {
+	assert(view->type == ROOTS_XDG_SHELL_V6_VIEW);
+	struct wlr_xdg_surface_v6 *surface = view->xdg_surface_v6;
+	if (surface->role != WLR_XDG_SURFACE_V6_ROLE_TOPLEVEL) {
+		return;
+	}
+
+	wlr_xdg_toplevel_v6_set_fullscreen(surface, fullscreen);
+}
+
 static void close(struct roots_view *view) {
 	assert(view->type == ROOTS_XDG_SHELL_V6_VIEW);
 	struct wlr_xdg_surface_v6 *surf = view->xdg_surface_v6;
@@ -150,6 +160,21 @@ static void handle_request_maximize(struct wl_listener *listener, void *data) {
 	view_maximize(view, surface->toplevel_state->next.maximized);
 }
 
+static void handle_request_fullscreen(struct wl_listener *listener,
+		void *data) {
+	struct roots_xdg_surface_v6 *roots_xdg_surface =
+		wl_container_of(listener, roots_xdg_surface, request_fullscreen);
+	struct roots_view *view = roots_xdg_surface->view;
+	struct wlr_xdg_surface_v6 *surface = view->xdg_surface_v6;
+	struct wlr_xdg_toplevel_v6_set_fullscreen_event *e = data;
+
+	if (surface->role != WLR_XDG_SURFACE_V6_ROLE_TOPLEVEL) {
+		return;
+	}
+
+	view_set_fullscreen(view, e->fullscreen, e->output);
+}
+
 static void handle_commit(struct wl_listener *listener, void *data) {
 	//struct roots_xdg_surface_v6 *roots_xdg_surface =
 	//	wl_container_of(listener, roots_xdg_surface, commit);
@@ -202,6 +227,9 @@ void handle_xdg_shell_v6_surface(struct wl_listener *listener, void *data) {
 	roots_surface->request_maximize.notify = handle_request_maximize;
 	wl_signal_add(&surface->events.request_maximize,
 		&roots_surface->request_maximize);
+	roots_surface->request_fullscreen.notify = handle_request_fullscreen;
+	wl_signal_add(&surface->events.request_fullscreen,
+		&roots_surface->request_fullscreen);
 
 	struct roots_view *view = calloc(1, sizeof(struct roots_view));
 	if (!view) {
@@ -217,6 +245,7 @@ void handle_xdg_shell_v6_surface(struct wl_listener *listener, void *data) {
 	view->resize = resize;
 	view->move_resize = move_resize;
 	view->maximize = maximize;
+	view->set_fullscreen = set_fullscreen;
 	view->close = close;
 	roots_surface->view = view;
 	view_init(view, desktop);
diff --git a/types/wlr_output.c b/types/wlr_output.c
index 411dd404..5a8baa3d 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -252,6 +252,24 @@ void wlr_output_make_current(struct wlr_output *output) {
 	output->impl->make_current(output);
 }
 
+static void output_fullscreen_surface_render(struct wlr_output *output,
+		struct wlr_surface *surface) {
+	int x = (output->width - surface->current->width) / 2;
+	int y = (output->height - surface->current->height) / 2;
+
+	glViewport(0, 0, output->width, output->height);
+	glClearColor(0, 0, 0, 0);
+
+	if (!wlr_surface_has_buffer(surface)) {
+		return;
+	}
+
+	float matrix[16];
+	wlr_texture_get_matrix(surface->texture, &matrix, &output->transform_matrix,
+		x, y);
+	wlr_render_with_matrix(surface->renderer, surface->texture, &matrix);
+}
+
 static void output_cursor_get_box(struct wlr_output_cursor *cursor,
 		struct wlr_box *box) {
 	box->x = cursor->x - cursor->hotspot_x;
@@ -308,6 +326,10 @@ static void output_cursor_render(struct wlr_output_cursor *cursor) {
 void wlr_output_swap_buffers(struct wlr_output *output) {
 	wl_signal_emit(&output->events.swap_buffers, &output);
 
+	if (output->fullscreen_surface != NULL) {
+		output_fullscreen_surface_render(output, output->fullscreen_surface);
+	}
+
 	struct wlr_output_cursor *cursor;
 	wl_list_for_each(cursor, &output->cursors, link) {
 		if (!cursor->enabled || output->hardware_cursor == cursor) {
@@ -334,6 +356,51 @@ uint32_t wlr_output_get_gamma_size(struct wlr_output *output) {
 	return output->impl->get_gamma_size(output);
 }
 
+static void output_fullscreen_surface_reset(struct wlr_output *output) {
+	if (output->fullscreen_surface != NULL) {
+		wl_list_remove(&output->fullscreen_surface_commit.link);
+		wl_list_remove(&output->fullscreen_surface_destroy.link);
+		output->fullscreen_surface = NULL;
+		output->needs_swap = true;
+	}
+}
+
+static void output_fullscreen_surface_handle_commit(
+		struct wl_listener *listener, void *data) {
+	struct wlr_output *output = wl_container_of(listener, output,
+		fullscreen_surface_destroy);
+	output->needs_swap = true;
+}
+
+static void output_fullscreen_surface_handle_destroy(
+		struct wl_listener *listener, void *data) {
+	struct wlr_output *output = wl_container_of(listener, output,
+		fullscreen_surface_destroy);
+	output_fullscreen_surface_reset(output);
+}
+
+void wlr_output_set_fullscreen_surface(struct wlr_output *output,
+		struct wlr_surface *surface) {
+	// TODO: hardware fullscreen
+	output_fullscreen_surface_reset(output);
+
+	output->fullscreen_surface = surface;
+	output->needs_swap = true;
+
+	if (surface == NULL) {
+		return;
+	}
+
+	output->fullscreen_surface_commit.notify =
+		output_fullscreen_surface_handle_commit;
+	wl_signal_add(&surface->events.commit, &output->fullscreen_surface_commit);
+	output->fullscreen_surface_destroy.notify =
+		output_fullscreen_surface_handle_destroy;
+	wl_signal_add(&surface->events.destroy,
+		&output->fullscreen_surface_destroy);
+}
+
+
 static void output_cursor_reset(struct wlr_output_cursor *cursor) {
 	if (cursor->output->hardware_cursor != cursor) {
 		cursor->output->needs_swap = true;
diff --git a/types/wlr_xdg_shell_v6.c b/types/wlr_xdg_shell_v6.c
index 429baa70..896a5f33 100644
--- a/types/wlr_xdg_shell_v6.c
+++ b/types/wlr_xdg_shell_v6.c
@@ -597,21 +597,14 @@ static void xdg_toplevel_protocol_move(struct wl_client *client,
 		return;
 	}
 
-	struct wlr_xdg_toplevel_v6_move_event *event =
-		calloc(1, sizeof(struct wlr_xdg_toplevel_v6_move_event));
-	if (event == NULL) {
-		wl_client_post_no_memory(client);
-		return;
-	}
-
-	event->client = client;
-	event->surface = surface;
-	event->seat = seat;
-	event->serial = serial;
-
-	wl_signal_emit(&surface->events.request_move, event);
+	struct wlr_xdg_toplevel_v6_move_event event = {
+		.client = client,
+		.surface = surface,
+		.seat = seat,
+		.serial = serial,
+	};
 
-	free(event);
+	wl_signal_emit(&surface->events.request_move, &event);
 }
 
 static void xdg_toplevel_protocol_resize(struct wl_client *client,
@@ -628,22 +621,15 @@ static void xdg_toplevel_protocol_resize(struct wl_client *client,
 		return;
 	}
 
-	struct wlr_xdg_toplevel_v6_resize_event *event =
-		calloc(1, sizeof(struct wlr_xdg_toplevel_v6_resize_event));
-	if (event == NULL) {
-		wl_client_post_no_memory(client);
-		return;
-	}
-
-	event->client = client;
-	event->surface = surface;
-	event->seat = seat;
-	event->serial = serial;
-	event->edges = edges;
-
-	wl_signal_emit(&surface->events.request_resize, event);
+	struct wlr_xdg_toplevel_v6_resize_event event = {
+		.client = client,
+		.surface = surface,
+		.seat = seat,
+		.serial = serial,
+		.edges = edges,
+	};
 
-	free(event);
+	wl_signal_emit(&surface->events.request_resize, &event);
 }
 
 static void xdg_toplevel_protocol_set_max_size(struct wl_client *client,
@@ -677,15 +663,38 @@ static void xdg_toplevel_protocol_unset_maximized(struct wl_client *client,
 static void xdg_toplevel_protocol_set_fullscreen(struct wl_client *client,
 		struct wl_resource *resource, struct wl_resource *output_resource) {
 	struct wlr_xdg_surface_v6 *surface = wl_resource_get_user_data(resource);
+
+	struct wlr_output *output = NULL;
+	if (output_resource != NULL) {
+		output = wl_resource_get_user_data(output_resource);
+	}
+
 	surface->toplevel_state->next.fullscreen = true;
-	wl_signal_emit(&surface->events.request_fullscreen, surface);
+
+	struct wlr_xdg_toplevel_v6_set_fullscreen_event event = {
+		.client = client,
+		.surface = surface,
+		.fullscreen = true,
+		.output = output,
+	};
+
+	wl_signal_emit(&surface->events.request_fullscreen, &event);
 }
 
 static void xdg_toplevel_protocol_unset_fullscreen(struct wl_client *client,
 		struct wl_resource *resource) {
 	struct wlr_xdg_surface_v6 *surface = wl_resource_get_user_data(resource);
+
 	surface->toplevel_state->next.fullscreen = false;
-	wl_signal_emit(&surface->events.request_fullscreen, surface);
+
+	struct wlr_xdg_toplevel_v6_set_fullscreen_event event = {
+		.client = client,
+		.surface = surface,
+		.fullscreen = false,
+		.output = NULL,
+	};
+
+	wl_signal_emit(&surface->events.request_fullscreen, &event);
 }
 
 static void xdg_toplevel_protocol_set_minimized(struct wl_client *client,