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wlr_scene: Add output_enter/output_leave signals

Browse source 
When we destroy a scene buffer, let's make sure that we call
output_leave signals before we finish the node which will call destroy
listeners.
This commit is contained in:
Alexander Orzechowski 2022-05-18 18:08:35 -04:00
parent 6ddb9e51bd
commit c46b53d0b0
2 changed files with 128 additions and 46 deletions
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7
include/wlr/types/wlr_scene.h
View file

@ -111,8 +111,14 @@ struct wlr_scene_buffer {
// May be NULL
struct wlr_buffer *buffer;
struct {
struct wl_signal output_enter; // struct wlr_scene_output
struct wl_signal output_leave; // struct wlr_scene_output
} events;
// private state
uint64_t active_outputs;
struct wlr_texture *texture;
struct wlr_fbox src_box;
int dst_width, dst_height;
@ -132,6 +138,7 @@ struct wlr_scene_output {
// private state
uint8_t index;
bool prev_scanout;
};

167
types/scene/wlr_scene.c
View file

@ -17,11 +17,6 @@ static struct wlr_scene *scene_root_from_node(struct wlr_scene_node *node) {
return (struct wlr_scene *)node;
}
static struct wlr_scene_tree *scene_tree_from_node(struct wlr_scene_node *node) {
assert(node->type == WLR_SCENE_NODE_TREE);
return (struct wlr_scene_tree *)node;
}
struct wlr_scene_surface *wlr_scene_surface_from_node(
struct wlr_scene_node *node) {
assert(node->type == WLR_SCENE_NODE_SURFACE);
@ -73,18 +68,6 @@ static void scene_node_init(struct wlr_scene_node *node,
}
}
static void scene_node_finish(struct wlr_scene_node *node) {
wlr_signal_emit_safe(&node->events.destroy, NULL);
struct wlr_scene_node *child, *child_tmp;
wl_list_for_each_safe(child, child_tmp,
&node->state.children, state.link) {
wlr_scene_node_destroy(child);
}
scene_node_state_finish(&node->state);
}
static void scene_node_damage_whole(struct wlr_scene_node *node);
void wlr_scene_node_destroy(struct wlr_scene_node *node) {
@ -93,7 +76,11 @@ void wlr_scene_node_destroy(struct wlr_scene_node *node) {
}
scene_node_damage_whole(node);
scene_node_finish(node);
// We want to call the destroy listeners before we do anything else
// in case the destroy signal would like to remove children before they
// are recursively destroyed.
wlr_signal_emit_safe(&node->events.destroy, NULL);
struct wlr_scene *scene = scene_node_get_root(node);
struct wlr_scene_output *scene_output;
@ -105,12 +92,6 @@ void wlr_scene_node_destroy(struct wlr_scene_node *node) {
}
wl_list_remove(&scene->presentation_destroy.link);
free(scene);
break;
case WLR_SCENE_NODE_TREE:;
struct wlr_scene_tree *tree = scene_tree_from_node(node);
free(tree);
break;
case WLR_SCENE_NODE_SURFACE:;
struct wlr_scene_surface *scene_surface = wlr_scene_surface_from_node(node);
@ -123,20 +104,36 @@ void wlr_scene_node_destroy(struct wlr_scene_node *node) {
wl_list_remove(&scene_surface->surface_commit.link);
wl_list_remove(&scene_surface->surface_destroy.link);
free(scene_surface);
break;
case WLR_SCENE_NODE_RECT:;
struct wlr_scene_rect *scene_rect = scene_rect_from_node(node);
free(scene_rect);
break;
case WLR_SCENE_NODE_BUFFER:;
struct wlr_scene_buffer *scene_buffer = scene_buffer_from_node(node);
uint64_t active = scene_buffer->active_outputs;
if (active) {
wl_list_for_each(scene_output, &scene->outputs, link) {
if (active & (1ull << scene_output->index)) {
wlr_signal_emit_safe(&scene_buffer->events.output_leave,
scene_output);
}
}
}
wlr_texture_destroy(scene_buffer->texture);
wlr_buffer_unlock(scene_buffer->buffer);
free(scene_buffer);
break;
case WLR_SCENE_NODE_TREE:
case WLR_SCENE_NODE_RECT:
break;
}
struct wlr_scene_node *child, *child_tmp;
wl_list_for_each_safe(child, child_tmp,
&node->state.children, state.link) {
wlr_scene_node_destroy(child);
}
scene_node_state_finish(&node->state);
free(node);
}
struct wlr_scene *wlr_scene_create(void) {
@ -167,6 +164,8 @@ static void scene_surface_handle_surface_destroy(struct wl_listener *listener,
wlr_scene_node_destroy(&scene_surface->node);
}
static void scene_node_get_size(struct wlr_scene_node *node, int *lx, int *ly);
// This function must be called whenever the coordinates/dimensions of a scene
// surface or scene output change. It is not necessary to call when a scene
// surface's node is enabled/disabled or obscured by other nodes. To quote the
@ -210,26 +209,62 @@ static void scene_surface_update_outputs(
}
}
static void scene_node_update_surface_outputs_iterator(
// This function must be called whenever the coordinates/dimensions of a scene
// buffer or scene output change. It is not necessary to call when a scene
// buffer's node is enabled/disabled or obscured by other nodes.
static void scene_buffer_update_outputs(
struct wlr_scene_buffer *scene_buffer,
int lx, int ly, struct wlr_scene *scene) {
struct wlr_box buffer_box = { .x = lx, .y = ly };
scene_node_get_size(&scene_buffer->node, &buffer_box.width, &buffer_box.height);
struct wlr_scene_output *scene_output;
wl_list_for_each(scene_output, &scene->outputs, link) {
struct wlr_box output_box = {
.x = scene_output->x,
.y = scene_output->y,
};
wlr_output_effective_resolution(scene_output->output,
&output_box.width, &output_box.height);
struct wlr_box intersection;
bool intersects = wlr_box_intersection(&intersection, &buffer_box, &output_box);
bool intersects_before = scene_buffer->active_outputs & (1ull << scene_output->index);
if (intersects && !intersects_before) {
scene_buffer->active_outputs |= 1ull << scene_output->index;
wlr_signal_emit_safe(&scene_buffer->events.output_enter, scene_output);
} else if (!intersects && intersects_before) {
scene_buffer->active_outputs &= ~(1ull << scene_output->index);
wlr_signal_emit_safe(&scene_buffer->events.output_leave, scene_output);
}
}
}
static void _scene_node_update_outputs(
struct wlr_scene_node *node, int lx, int ly, struct wlr_scene *scene) {
if (node->type == WLR_SCENE_NODE_SURFACE) {
struct wlr_scene_surface *scene_surface =
wlr_scene_surface_from_node(node);
scene_surface_update_outputs(scene_surface, lx, ly, scene);
} else if (node->type == WLR_SCENE_NODE_BUFFER) {
struct wlr_scene_buffer *scene_buffer =
scene_buffer_from_node(node);
scene_buffer_update_outputs(scene_buffer, lx, ly, scene);
}
struct wlr_scene_node *child;
wl_list_for_each(child, &node->state.children, state.link) {
scene_node_update_surface_outputs_iterator(child, lx + child->state.x,
_scene_node_update_outputs(child, lx + child->state.x,
ly + child->state.y, scene);
}
}
static void scene_node_update_surface_outputs(struct wlr_scene_node *node) {
static void scene_node_update_outputs(struct wlr_scene_node *node) {
struct wlr_scene *scene = scene_node_get_root(node);
int lx, ly;
wlr_scene_node_coords(node, &lx, &ly);
scene_node_update_surface_outputs_iterator(node, lx, ly, scene);
_scene_node_update_outputs(node, lx, ly, scene);
}
static void scene_surface_handle_surface_commit(struct wl_listener *listener,
@ -307,7 +342,7 @@ struct wlr_scene_surface *wlr_scene_surface_create(struct wlr_scene_node *parent
scene_node_damage_whole(&scene_surface->node);
scene_node_update_surface_outputs(&scene_surface->node);
scene_node_update_outputs(&scene_surface->node);
return scene_surface;
}
@ -362,8 +397,13 @@ struct wlr_scene_buffer *wlr_scene_buffer_create(struct wlr_scene_node *parent,
scene_buffer->buffer = wlr_buffer_lock(buffer);
}
wl_signal_init(&scene_buffer->events.output_enter);
wl_signal_init(&scene_buffer->events.output_leave);
scene_node_damage_whole(&scene_buffer->node);
scene_node_update_outputs(&scene_buffer->node);
return scene_buffer;
}
@ -386,6 +426,8 @@ void wlr_scene_buffer_set_buffer(struct wlr_scene_buffer *scene_buffer,
}
scene_node_damage_whole(&scene_buffer->node);
scene_node_update_outputs(&scene_buffer->node);
}
void wlr_scene_buffer_set_source_box(struct wlr_scene_buffer *scene_buffer,
@ -415,6 +457,8 @@ void wlr_scene_buffer_set_dest_size(struct wlr_scene_buffer *scene_buffer,
scene_buffer->dst_width = width;
scene_buffer->dst_height = height;
scene_node_damage_whole(&scene_buffer->node);
scene_node_update_outputs(&scene_buffer->node);
}
void wlr_scene_buffer_set_transform(struct wlr_scene_buffer *scene_buffer,
@ -559,7 +603,7 @@ void wlr_scene_node_set_position(struct wlr_scene_node *node, int x, int y) {
node->state.y = y;
scene_node_damage_whole(node);
scene_node_update_surface_outputs(node);
scene_node_update_outputs(node);
}
void wlr_scene_node_place_above(struct wlr_scene_node *node,
@ -634,7 +678,7 @@ void wlr_scene_node_reparent(struct wlr_scene_node *node,
scene_node_damage_whole(node);
scene_node_update_surface_outputs(node);
scene_node_update_outputs(node);
}
bool wlr_scene_node_coords(struct wlr_scene_node *node,
@ -968,22 +1012,53 @@ struct wlr_scene_output *wlr_scene_output_create(struct wlr_scene *scene,
scene_output->output = output;
scene_output->scene = scene;
wlr_addon_init(&scene_output->addon, &output->addons, scene, &output_addon_impl);
wl_list_insert(&scene->outputs, &scene_output->link);
int prev_output_index = -1;
struct wl_list *prev_output_link = &scene->outputs;
struct wlr_scene_output *current_output;
wl_list_for_each(current_output, &scene->outputs, link) {
if (prev_output_index + 1 != current_output->index) {
break;
}
prev_output_index = current_output->index;
prev_output_link = &current_output->link;
}
scene_output->index = prev_output_index + 1;
assert(scene_output->index < 64);
wl_list_insert(prev_output_link, &scene_output->link);
wlr_output_damage_add_whole(scene_output->damage);
return scene_output;
}
static void scene_output_send_leave_iterator(struct wlr_surface *surface,
int sx, int sy, void *data) {
struct wlr_output *output = data;
wlr_surface_send_leave(surface, output);
static void scene_node_remove_output(struct wlr_scene_node *node,
struct wlr_scene_output *output) {
if (node->type == WLR_SCENE_NODE_SURFACE) {
struct wlr_scene_surface *scene_surface =
wlr_scene_surface_from_node(node);
wlr_surface_send_leave(scene_surface->surface, output->output);
} else if (node->type == WLR_SCENE_NODE_BUFFER) {
struct wlr_scene_buffer *scene_buffer =
scene_buffer_from_node(node);
uint64_t mask = 1ull << output->index;
if (scene_buffer->active_outputs & mask) {
scene_buffer->active_outputs &= ~mask;
wlr_signal_emit_safe(&scene_buffer->events.output_leave, output);
}
}
struct wlr_scene_node *child;
wl_list_for_each(child, &node->state.children, state.link) {
scene_node_remove_output(child, output);
}
}
void wlr_scene_output_destroy(struct wlr_scene_output *scene_output) {
wlr_scene_output_for_each_surface(scene_output,
scene_output_send_leave_iterator, scene_output->output);
scene_node_remove_output(&scene_output->scene->node, scene_output);
wlr_addon_finish(&scene_output->addon);
wl_list_remove(&scene_output->link);
@ -1013,7 +1088,7 @@ void wlr_scene_output_set_position(struct wlr_scene_output *scene_output,
scene_output->y = ly;
wlr_output_damage_add_whole(scene_output->damage);
scene_node_update_surface_outputs(&scene_output->scene->node);
scene_node_update_outputs(&scene_output->scene->node);
}
struct check_scanout_data {