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scene: Add layer_shell_v1 helper

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This helper behaves similar to the xdg_shell helper, and additionally
provides a little assistance for positioning and exclusive_zone
management.
This commit is contained in:
Kenny Levinsen 2022-01-09 23:48:24 +01:00
parent 3db1bcbe64
commit 1e3662ce57
3 changed files with 222 additions and 0 deletions
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38
include/wlr/types/wlr_scene.h
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@ -26,6 +26,7 @@
struct wlr_output;
struct wlr_output_layout;
struct wlr_xdg_surface;
struct wlr_layer_surface_v1;
enum wlr_scene_node_type {
WLR_SCENE_NODE_ROOT,
@ -136,6 +137,19 @@ struct wlr_scene_output {
bool prev_scanout;
};
/** A layer shell scene helper */
struct wlr_scene_layer_surface_v1 {
struct wlr_scene_node *node;
struct wlr_layer_surface_v1 *layer_surface;
// private state
struct wl_listener tree_destroy;
struct wl_listener layer_surface_destroy;
struct wl_listener layer_surface_map;
struct wl_listener layer_surface_unmap;
};
typedef void (*wlr_scene_node_iterator_func_t)(struct wlr_scene_node *node,
int sx, int sy, void *data);
@ -354,4 +368,28 @@ struct wlr_scene_node *wlr_scene_subsurface_tree_create(
struct wlr_scene_node *wlr_scene_xdg_surface_create(
struct wlr_scene_node *parent, struct wlr_xdg_surface *xdg_surface);
/**
* Add a node displaying a layer_surface_v1 and all of its sub-surfaces to the
* scene-graph.
*
* The origin of the returned scene-graph node will match the top-left corner
* of the layer surface.
*/
struct wlr_scene_layer_surface_v1 *wlr_scene_layer_surface_v1_create(
struct wlr_scene_node *parent, struct wlr_layer_surface_v1 *layer_surface);
/**
* Configure a layer_surface_v1, position its scene node in accordance to its
* current state, and update the remaining usable area.
*
* full_area represents the entire area that may be used by the layer surface
* if its exclusive_zone is -1, and is usually the output dimensions.
* usable_area represents what remains of full_area that can be used if
* exclusive_zone is >= 0. usable_area is updated if the surface has a positive
* exclusive_zone, so that it can be used for the next layer surface.
*/
void wlr_scene_layer_surface_v1_configure(
struct wlr_scene_layer_surface_v1 *scene_layer_surface,
const struct wlr_box *full_area, struct wlr_box *usable_area);
#endif