layer_shell: Implement handle_layer_shell_v1_surface_new

layer_shell_v1.c

@@ -7,21 +7,90 @@
  */
 
 #include "layer_shell_v1.h"
+#include "output.h"
 #include "server.h"
 
+#include <assert.h>
+#include <complex.h>
 #include <wayland-server-core.h>
+#include <wayland-util.h>
 #include <wlr/types/wlr_layer_shell_v1.h>
 #include <wlr/util/log.h>
 
+static struct wlr_scene_tree *
+cg_layer_get_scene(struct cg_output *output, enum zwlr_layer_shell_v1_layer layer_type)
+{
+	assert(layer_type <= NUM_LAYERS);
+	switch (layer_type) {
+	case ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND:
+		return output->layers.shell_background;
+	case ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM:
+		return output->layers.shell_bottom;
+	case ZWLR_LAYER_SHELL_V1_LAYER_TOP:
+		return output->layers.shell_top;
+	case ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY:
+		return output->layers.shell_overlay;
+	}
+	return NULL;
+}
+
 void
 handle_layer_shell_v1_surface_new(struct wl_listener *listener, void *data)
 {
 	struct cg_server *server = wl_container_of(listener, server, new_layer_shell_v1_surface);
+	struct cg_seat *seat = server->seat;
 	struct wlr_layer_surface_v1 *layer_surface = data;
 
-	wlr_log(WLR_DEBUG, "New layer shell surface: namespace %s layer %d anchor %d size %dx%d margin %d,%d,%d,%d",
+	wlr_log(WLR_DEBUG,
+		"New layer shell surface: namespace %s layer %d anchor %" PRIu32 " size %" PRIu32 "x%" PRIu32
+		" margin %" PRIu32 ",%" PRIu32 ",%" PRIu32 ",%" PRIu32 ",",
 		layer_surface->namespace, layer_surface->pending.layer, layer_surface->pending.anchor,
 		layer_surface->pending.desired_width, layer_surface->pending.desired_height,
 		layer_surface->pending.margin.top, layer_surface->pending.margin.right,
 		layer_surface->pending.margin.bottom, layer_surface->pending.margin.left);
+
+	if (layer_surface->output) {
+		struct wlr_output *wlr_output =
+			wlr_output_layout_output_at(server->output_layout, seat->cursor->x, seat->cursor->y);
+		if (wlr_output) {
+			layer_surface->output = wlr_output;
+		} else {
+			struct cg_output *output = wl_container_of(server->outputs.prev, output, link);
+			layer_surface->output = output->wlr_output;
+		}
+	}
+	struct cg_output *output = layer_surface->output->data;
+
+	enum zwlr_layer_shell_v1_layer layer_type = layer_surface->pending.layer;
+	struct wlr_scene_tree *output_layer = cg_layer_get_scene(output, layer_type);
+
+	struct cg_layer_surface *cg_surface = calloc(1, sizeof(*cg_surface));
+	if (!cg_surface) {
+		wlr_layer_surface_v1_destroy(layer_surface);
+		wlr_log(WLR_ERROR, "Failed to allocate layer shell");
+		return;
+	}
+
+	struct wlr_scene_layer_surface_v1 *scene = wlr_scene_layer_surface_v1_create(output_layer, layer_surface);
+	if (!scene) {
+		wlr_log(WLR_ERROR, "Could not allocate a layer_surface_v1");
+		return;
+	}
+
+	cg_surface->server = server;
+	cg_surface->layer_surface = scene->layer_surface;
+	cg_surface->scene = scene;
+	cg_surface->tree = scene->tree;
+	cg_surface->layer_surface->data = cg_surface;
+	cg_surface->output = output;
+
+	cg_surface->map.notify = handle_map;
+	wl_signal_add(&layer_surface->surface->events.map, &cg_surface->map);
+	cg_surface->unmap.notify = handle_unmap;
+	wl_signal_add(&layer_surface->surface->events.unmap, &cg_surface->unmap);
+	cg_surface->surface_commit.notify = handle_surface_commit;
+	wl_signal_add(&layer_surface->surface->events.commit, &cg_surface->surface_commit);
+
+	cg_surface->output_destroy.notify = handle_output_destroy;
+	wl_signal_add(&output->events.disable, &surface->output_destroy);
 }

layer_shell_v1.h

@@ -2,7 +2,26 @@
 #define CG_LAYER_SHELL_V1_H
 
 #include <wayland-server-core.h>
+#include <wlr/types/wlr_layer_shell_v1.h>
+#include <wlr/types/wlr_scene.h>
 
 void handle_layer_shell_v1_surface_new(struct wl_listener *listener, void *data);
 
+struct cg_layer_surface {
+	struct cg_server *server;
+	struct wl_list link; // cg_output::layers
+
+	struct wl_listener map;
+	struct wl_listener unmap;
+	struct wl_listener surface_commit;
+//	struct wl_listener destroy;
+
+	struct wl_listener output_destroy;
+
+	struct cg_output *output;
+	struct wlr_scene_tree *tree;
+	struct wlr_scene_layer_surface_v1 *scene;
+	struct wlr_layer_surface_v1 *layer_surface;
+};
+
 #endif

output.c

@@ -235,6 +235,11 @@ output_destroy(struct cg_output *output)
 	wl_list_remove(&output->frame.link);
 	wl_list_remove(&output->link);
 
+	wlr_scene_node_destroy(&output->layers.shell_background->node);
+	wlr_scene_node_destroy(&output->layers.shell_bottom->node);
+	wlr_scene_node_destroy(&output->layers.shell_top->node);
+	wlr_scene_node_destroy(&output->layers.shell_overlay->node);
+
 	output_layout_remove(output);
 
 	free(output);
@@ -255,6 +260,18 @@ handle_output_destroy(struct wl_listener *listener, void *data)
 	output_destroy(output);
 }
 
+static struct wlr_scene_tree *
+create_layer_for_output(struct cg_output *output)
+{
+	struct cg_server *server = output->server;
+	struct wlr_scene_tree *layer = wlr_scene_tree_create(&server->scene->tree);
+	if (layer == NULL) {
+		return NULL;
+	}
+	layer->node.data = output->wlr_output;
+	return layer;
+}
+
 void
 handle_new_output(struct wl_listener *listener, void *data)
 {
@@ -320,6 +337,11 @@ handle_new_output(struct wl_listener *listener, void *data)
 		output_disable(next);
 	}
 
+	output->layers.shell_background = create_layer_for_output(output);
+	output->layers.shell_bottom = create_layer_for_output(output);
+	output->layers.shell_top = create_layer_for_output(output);
+	output->layers.shell_overlay = create_layer_for_output(output);
+
 	if (!wlr_xcursor_manager_load(server->seat->xcursor_manager, wlr_output->scale)) {
 		wlr_log(WLR_ERROR, "Cannot load XCursor theme for output '%s' with scale %f", wlr_output->name,
 			wlr_output->scale);

output.h

@@ -17,6 +17,15 @@ struct cg_output {
 	struct wl_listener destroy;
 	struct wl_listener frame;
 
+	struct {
+		struct wlr_scene_tree *shell_background;
+		struct wlr_scene_tree *shell_bottom;
+		struct wlr_scene_tree *shell_top;
+		struct wlr_scene_tree *shell_overlay;
+	} layers;
+
+	struct wlr_box usable_area;
+
 	struct wl_list link; // cg_server::outputs
 };