Add initial layer shell implementation

heart/example/main.c

@@ -75,7 +75,10 @@ int main(int argc, char *argv[]) {
 
   struct hrt_server server;
 
-  if(!hrt_server_init(&server, &output_callbacks, &seat_callbacks, &view_callbacks, WLR_DEBUG)) {
+  if (!hrt_server_init(&server, &output_callbacks, &seat_callbacks,
+                       &view_callbacks,
+                       NULL,
+                       WLR_DEBUG)) {
     return 1;
   }
 

heart/include/hrt/hrt_layer_shell.h

@@ -0,0 +1,59 @@
+#ifndef HRT_LAYER_SHELL
+#define HRT_LAYER_SHELL
+
+#include <wayland-server-core.h>
+#include <wlr/types/wlr_layer_shell_v1.h>
+#include <wlr/types/wlr_output.h>
+
+#include <hrt/hrt_scene.h>
+
+struct hrt_output;
+
+struct hrt_layer_shell_surface {
+    struct wlr_layer_surface_v1 *layer_surface;
+    struct wlr_scene_layer_surface_v1 *scene_layer;
+    struct hrt_scene_output *output;
+    bool mapped;
+    struct {
+        struct wl_listener commit;
+        struct wl_listener map;
+        struct wl_listener unmap;
+        struct wl_listener new_popup;
+        struct wl_listener scene_destroy;
+    } events;
+};
+
+typedef void (*layer_shell_event_handler)(struct hrt_layer_shell_surface *);
+
+struct hrt_layer_shell_callbacks {
+    layer_shell_event_handler new_layer_surface;
+};
+
+struct hrt_layer_shell_surface *
+hrt_layer_shell_surface_create(struct wlr_layer_surface_v1 *surface);
+
+/**
+ * Destroy a partially created hrt_layer_shell-surface object
+ */
+void
+hrt_layer_shell_surface_abort(struct hrt_layer_shell_surface *surface);
+
+struct hrt_output *
+hrt_layer_surface_output(struct hrt_layer_shell_surface *layer_shell);
+
+void hrt_layer_shell_surface_set_output(
+    struct hrt_layer_shell_surface *layer_shell, struct hrt_output *output);
+
+/**
+ * Place a freshly-initialized surface in an output. Should only be called once during
+ * intial placement.
+ */
+void hrt_layer_shell_surface_place(struct hrt_layer_shell_surface *surface,
+				   struct hrt_scene_output *output);
+
+/**
+ * Finish initializing the layer shell object
+ */
+void hrt_layer_shell_finish_init(struct hrt_layer_shell_surface *surface);
+
+#endif

heart/include/hrt/hrt_scene.h

@@ -3,10 +3,12 @@
 
 #include <stdint.h>
 #include <stdbool.h>
-#include <hrt/hrt_output.h>
 #include <wayland-server-core.h>
 #include <wlr/types/wlr_xdg_shell.h>
 #include <wlr/types/wlr_scene.h>
+#include <wlr/types/wlr_layer_shell_v1.h>
+
+struct hrt_output;
 
 struct hrt_scene_root {
     struct wlr_scene_tree *background;
@@ -17,7 +19,7 @@ struct hrt_scene_root {
     struct wlr_scene_tree *overlay;
     // Should we store the outputs and groups associated with this?
     struct {
-      struct wl_listener scene_destroy;
+        struct wl_listener scene_destroy;
     } listeners;
 };
 
@@ -27,6 +29,7 @@ struct hrt_scene_output {
 
     struct wlr_scene_tree *top;
     struct wlr_scene_tree *overlay;
+    struct hrt_output *output;
 };
 
 struct hrt_scene_group {
@@ -49,6 +52,10 @@ struct hrt_scene_output *hrt_scene_output_create(struct hrt_scene_root *scene);
 
 void hrt_scene_output_destroy(struct hrt_scene_output *output);
 
+struct wlr_scene_tree *hrt_scene_output_get_layer(
+    struct hrt_scene_output *output, enum zwlr_layer_shell_v1_layer layer_type);
+
+
 struct hrt_scene_group *hrt_scene_group_create(struct hrt_scene_root *parent);
 
 void hrt_scene_group_destroy(struct hrt_scene_group *group);

heart/include/hrt/hrt_server.h

@@ -1,6 +1,7 @@
 #ifndef HRT_HRT_SERVER_H
 #define HRT_HRT_SERVER_H
 
+#include "hrt/hrt_layer_shell.h"
 #include "wlr/backend/session.h"
 #include <stdbool.h>
 
@@ -19,7 +20,8 @@
 struct hrt_server {
     struct wl_display *wl_display;
     struct wlr_backend *backend;
-    struct wl_listener backend_destroy;
+    struct wlr_backend *headless_backend;
+
     struct wlr_session *session;
     struct wlr_renderer *renderer;
     struct wlr_compositor *compositor;
@@ -33,23 +35,36 @@ struct hrt_server {
     struct wl_listener output_layout_changed;
     struct wl_listener output_manager_apply;
     struct wl_listener output_manager_test;
-    struct wl_listener output_manager_destroy;
 
     struct hrt_seat seat;
+    struct hrt_output *fallback_output;
 
     struct wlr_xdg_shell *xdg_shell;
     struct wl_listener new_xdg_toplevel;
     struct wl_listener new_xdg_popup;
 
+    struct wlr_layer_shell_v1 *layer_shell;
+    struct wl_listener new_layer_shell;
+
+    struct {
+        struct wl_listener backend;
+        struct wl_listener headless;
+        struct wl_listener output_manager;
+        struct wl_listener layer_shell;
+    } destroy_listener;
+
     const struct hrt_output_callbacks *output_callback;
     const struct hrt_view_callbacks *view_callbacks;
+    const struct hrt_layer_shell_callbacks *layer_shell_callbacks;
 };
 
-bool hrt_server_init(struct hrt_server *server,
-                     const struct hrt_output_callbacks *output_callbacks,
-                     const struct hrt_seat_callbacks *seat_callbacks,
-                     const struct hrt_view_callbacks *view_callbacks,
-                     enum wlr_log_importance log_level);
+bool hrt_server_init(
+    struct hrt_server *server,
+    const struct hrt_output_callbacks *output_callbacks,
+    const struct hrt_seat_callbacks *seat_callbacks,
+    const struct hrt_view_callbacks *view_callbacks,
+    const struct hrt_layer_shell_callbacks *layer_shell_callbacks,
+    enum wlr_log_importance log_level);
 
 bool hrt_server_start(struct hrt_server *server);
 

heart/include/layer_shell_impl.h

@@ -0,0 +1,9 @@
+#ifndef LAYER_SHELL_IMPL
+#define LAYER_SHELL_IMPL
+
+#include "hrt/hrt_server.h"
+#include <wayland-server-core.h>
+
+bool hrt_layer_shell_init(struct hrt_server *server);
+
+#endif

heart/include/output_impl.h

@@ -1,7 +1,12 @@
 #pragma once
 
+#include <wlr/types/wlr_output.h>
+
 #include "hrt/hrt_server.h"
 
 bool hrt_output_init(struct hrt_server *server,
 		     const struct hrt_output_callbacks *callbacks);
 void hrt_output_destroy(struct hrt_server *server);
+
+struct hrt_output *hrt_output_create(struct hrt_server *server,
+				     struct wlr_output *wlr_output);

heart/protocols/meson.build

@@ -19,6 +19,7 @@ endif
 protocols = [
   [wl_protocol_dir, 'stable/xdg-shell/xdg-shell.xml'],
   [wlr_protocol_dir, 'wlr-output-management-unstable-v1.xml'],
+  [wlr_protocol_dir, 'wlr-layer-shell-unstable-v1.xml'],
 ]
 
 wl_protos_src = []