wlroots/types/wlr_surface.c

889 lines
26 KiB
C

#include <assert.h>
#include <stdlib.h>
#include <wayland-server.h>
#include <wlr/util/log.h>
#include <wlr/egl.h>
#include <wlr/render/interface.h>
#include <wlr/types/wlr_surface.h>
#include <wlr/render/matrix.h>
static void wlr_surface_state_reset_buffer(struct wlr_surface_state *state) {
if (state->buffer) {
wl_list_remove(&state->buffer_destroy_listener.link);
state->buffer = NULL;
}
}
static void buffer_destroy(struct wl_listener *listener, void *data) {
struct wlr_surface_state *state =
wl_container_of(listener, state, buffer_destroy_listener);
wl_list_remove(&state->buffer_destroy_listener.link);
state->buffer = NULL;
}
static void wlr_surface_state_release_buffer(struct wlr_surface_state *state) {
if (state->buffer) {
wl_resource_post_event(state->buffer, WL_BUFFER_RELEASE);
wl_list_remove(&state->buffer_destroy_listener.link);
state->buffer = NULL;
}
}
static void wlr_surface_state_set_buffer(struct wlr_surface_state *state,
struct wl_resource *buffer) {
state->buffer = buffer;
if (buffer) {
wl_resource_add_destroy_listener(buffer,
&state->buffer_destroy_listener);
state->buffer_destroy_listener.notify = buffer_destroy;
}
}
static void surface_destroy(struct wl_client *client,
struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static void surface_attach(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *buffer, int32_t sx, int32_t sy) {
struct wlr_surface *surface = wl_resource_get_user_data(resource);
surface->pending->invalid |= WLR_SURFACE_INVALID_BUFFER;
surface->pending->sx = sx;
surface->pending->sy = sy;
wlr_surface_state_reset_buffer(surface->pending);
wlr_surface_state_set_buffer(surface->pending, buffer);
}
static void surface_damage(struct wl_client *client,
struct wl_resource *resource,
int32_t x, int32_t y, int32_t width, int32_t height) {
struct wlr_surface *surface = wl_resource_get_user_data(resource);
if (width < 0 || height < 0) {
return;
}
surface->pending->invalid |= WLR_SURFACE_INVALID_SURFACE_DAMAGE;
pixman_region32_union_rect(&surface->pending->surface_damage,
&surface->pending->surface_damage,
x, y, width, height);
}
static void destroy_frame_callback(struct wl_resource *resource) {
struct wlr_frame_callback *cb = wl_resource_get_user_data(resource);
wl_list_remove(&cb->link);
free(cb);
}
static void surface_frame(struct wl_client *client,
struct wl_resource *resource, uint32_t callback) {
struct wlr_frame_callback *cb;
struct wlr_surface *surface = wl_resource_get_user_data(resource);
cb = malloc(sizeof(struct wlr_frame_callback));
if (cb == NULL) {
wl_resource_post_no_memory(resource);
return;
}
cb->resource = wl_resource_create(client,
&wl_callback_interface, 1, callback);
if (cb->resource == NULL) {
free(cb);
wl_resource_post_no_memory(resource);
return;
}
wl_resource_set_implementation(cb->resource,
NULL, cb, destroy_frame_callback);
wl_list_insert(surface->pending->frame_callback_list.prev, &cb->link);
surface->pending->invalid |= WLR_SURFACE_INVALID_FRAME_CALLBACK_LIST;
}
static void surface_set_opaque_region(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *region_resource) {
struct wlr_surface *surface = wl_resource_get_user_data(resource);
if ((surface->pending->invalid & WLR_SURFACE_INVALID_OPAQUE_REGION)) {
pixman_region32_clear(&surface->pending->opaque);
}
surface->pending->invalid |= WLR_SURFACE_INVALID_OPAQUE_REGION;
if (region_resource) {
pixman_region32_t *region = wl_resource_get_user_data(region_resource);
pixman_region32_copy(&surface->pending->opaque, region);
} else {
pixman_region32_clear(&surface->pending->opaque);
}
}
static void surface_set_input_region(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *region_resource) {
struct wlr_surface *surface = wl_resource_get_user_data(resource);
surface->pending->invalid |= WLR_SURFACE_INVALID_INPUT_REGION;
if (region_resource) {
pixman_region32_t *region = wl_resource_get_user_data(region_resource);
pixman_region32_copy(&surface->pending->input, region);
} else {
pixman_region32_init_rect(&surface->pending->input,
INT32_MIN, INT32_MIN, UINT32_MAX, UINT32_MAX);
}
}
static void wlr_surface_update_size(struct wlr_surface *surface, struct wlr_surface_state *state) {
if (!state->buffer) {
state->height = 0;
state->width = 0;
return;
}
int scale = state->scale;
enum wl_output_transform transform = state->transform;
wlr_texture_get_buffer_size(surface->texture, state->buffer,
&state->buffer_width, &state->buffer_height);
int _width = state->buffer_width / scale;
int _height = state->buffer_height / scale;
if (transform == WL_OUTPUT_TRANSFORM_90 ||
transform == WL_OUTPUT_TRANSFORM_270 ||
transform == WL_OUTPUT_TRANSFORM_FLIPPED_90 ||
transform == WL_OUTPUT_TRANSFORM_FLIPPED_270) {
int tmp = _width;
_width = _height;
_height = tmp;
}
struct wlr_frame_callback *cb, *tmp;
wl_list_for_each_safe(cb, tmp, &state->frame_callback_list, link) {
wl_resource_destroy(cb->resource);
}
wl_list_init(&state->frame_callback_list);
state->width = _width;
state->height = _height;
}
static void wlr_surface_to_buffer_region(int scale,
enum wl_output_transform transform, pixman_region32_t *surface_region,
pixman_region32_t *buffer_region,
int width, int height) {
pixman_box32_t *src_rects, *dest_rects;
int nrects, i;
src_rects = pixman_region32_rectangles(surface_region, &nrects);
dest_rects = malloc(nrects * sizeof(*dest_rects));
if (!dest_rects) {
return;
}
for (i = 0; i < nrects; i++) {
switch (transform) {
default:
case WL_OUTPUT_TRANSFORM_NORMAL:
dest_rects[i].x1 = src_rects[i].x1;
dest_rects[i].y1 = src_rects[i].y1;
dest_rects[i].x2 = src_rects[i].x2;
dest_rects[i].y2 = src_rects[i].y2;
break;
case WL_OUTPUT_TRANSFORM_90:
dest_rects[i].x1 = height - src_rects[i].y2;
dest_rects[i].y1 = src_rects[i].x1;
dest_rects[i].x2 = height - src_rects[i].y1;
dest_rects[i].y2 = src_rects[i].x2;
break;
case WL_OUTPUT_TRANSFORM_180:
dest_rects[i].x1 = width - src_rects[i].x2;
dest_rects[i].y1 = height - src_rects[i].y2;
dest_rects[i].x2 = width - src_rects[i].x1;
dest_rects[i].y2 = height - src_rects[i].y1;
break;
case WL_OUTPUT_TRANSFORM_270:
dest_rects[i].x1 = src_rects[i].y1;
dest_rects[i].y1 = width - src_rects[i].x2;
dest_rects[i].x2 = src_rects[i].y2;
dest_rects[i].y2 = width - src_rects[i].x1;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED:
dest_rects[i].x1 = width - src_rects[i].x2;
dest_rects[i].y1 = src_rects[i].y1;
dest_rects[i].x2 = width - src_rects[i].x1;
dest_rects[i].y2 = src_rects[i].y2;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
dest_rects[i].x1 = height - src_rects[i].y2;
dest_rects[i].y1 = width - src_rects[i].x2;
dest_rects[i].x2 = height - src_rects[i].y1;
dest_rects[i].y2 = width - src_rects[i].x1;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
dest_rects[i].x1 = src_rects[i].x1;
dest_rects[i].y1 = height - src_rects[i].y2;
dest_rects[i].x2 = src_rects[i].x2;
dest_rects[i].y2 = height - src_rects[i].y1;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
dest_rects[i].x1 = src_rects[i].y1;
dest_rects[i].y1 = src_rects[i].x1;
dest_rects[i].x2 = src_rects[i].y2;
dest_rects[i].y2 = src_rects[i].x2;
break;
}
}
if (scale != 1) {
for (i = 0; i < nrects; i++) {
dest_rects[i].x1 *= scale;
dest_rects[i].x2 *= scale;
dest_rects[i].y1 *= scale;
dest_rects[i].y2 *= scale;
}
}
pixman_region32_fini(buffer_region);
pixman_region32_init_rects(buffer_region, dest_rects, nrects);
free(dest_rects);
}
/**
* Append pending state to current state and clear pending state.
*/
static void wlr_surface_move_state(struct wlr_surface *surface, struct wlr_surface_state *next,
struct wlr_surface_state *state) {
bool update_damage = false;
bool update_size = false;
if ((next->invalid & WLR_SURFACE_INVALID_SCALE)) {
state->scale = next->scale;
update_size = true;
}
if ((next->invalid & WLR_SURFACE_INVALID_TRANSFORM)) {
state->transform = next->transform;
update_size = true;
}
if ((next->invalid & WLR_SURFACE_INVALID_BUFFER)) {
wlr_surface_state_release_buffer(state);
wlr_surface_state_set_buffer(state, next->buffer);
wlr_surface_state_reset_buffer(next);
state->sx = next->sx;
state->sy = next->sy;
update_size = true;
}
if (update_size) {
wlr_surface_update_size(surface, state);
}
if ((next->invalid & WLR_SURFACE_INVALID_SURFACE_DAMAGE)) {
pixman_region32_union(&state->surface_damage,
&state->surface_damage,
&next->surface_damage);
pixman_region32_intersect_rect(&state->surface_damage,
&state->surface_damage, 0, 0, state->width,
state->height);
pixman_region32_clear(&next->surface_damage);
update_damage = true;
}
if ((next->invalid & WLR_SURFACE_INVALID_BUFFER_DAMAGE)) {
pixman_region32_union(&state->buffer_damage,
&state->buffer_damage,
&next->buffer_damage);
pixman_region32_clear(&next->buffer_damage);
update_damage = true;
}
if (update_damage) {
pixman_region32_t buffer_damage;
pixman_region32_init(&buffer_damage);
wlr_surface_to_buffer_region(state->scale, state->transform,
&state->surface_damage, &buffer_damage, state->width,
state->height);
pixman_region32_union(&state->buffer_damage,
&state->buffer_damage, &buffer_damage);
pixman_region32_fini(&buffer_damage);
pixman_region32_intersect_rect(&state->buffer_damage,
&state->buffer_damage, 0, 0,
state->buffer_width, state->buffer_height);
}
if ((next->invalid & WLR_SURFACE_INVALID_OPAQUE_REGION)) {
// TODO: process buffer
pixman_region32_clear(&next->opaque);
}
if ((next->invalid & WLR_SURFACE_INVALID_INPUT_REGION)) {
// TODO: process buffer
pixman_region32_copy(&state->input, &next->input);
}
if ((next->invalid & WLR_SURFACE_INVALID_SUBSURFACE_POSITION)) {
state->subsurface_position.x = next->subsurface_position.x;
state->subsurface_position.y = next->subsurface_position.y;
next->subsurface_position.x = 0;
next->subsurface_position.y = 0;
}
if ((next->invalid & WLR_SURFACE_INVALID_FRAME_CALLBACK_LIST)) {
wl_list_insert_list(&state->frame_callback_list, &next->frame_callback_list);
wl_list_init(&next->frame_callback_list);
}
state->invalid |= next->invalid;
next->invalid = 0;
}
static void wlr_surface_damage_subsurfaces(struct wlr_subsurface *subsurface) {
// XXX: This is probably the wrong way to do it, because this damage should
// come from the client, but weston doesn't do it correctly either and it
// seems to work ok. See the comment on weston_surface_damage for more info
// about a better approach.
struct wlr_surface *surface = subsurface->surface;
pixman_region32_union_rect(&surface->current->surface_damage,
&surface->current->surface_damage,
0, 0, surface->current->width,
surface->current->height);
subsurface->reordered = false;
struct wlr_subsurface *child;
wl_list_for_each(child, &subsurface->surface->subsurface_list, parent_link) {
wlr_surface_damage_subsurfaces(child);
}
}
static void wlr_surface_flush_damage(struct wlr_surface *surface,
bool reupload_buffer) {
if (!surface->current->buffer) {
return;
}
struct wl_shm_buffer *buffer = wl_shm_buffer_get(surface->current->buffer);
if (!buffer) {
if (wlr_renderer_buffer_is_drm(surface->renderer,
surface->current->buffer)) {
wlr_texture_upload_drm(surface->texture, surface->current->buffer);
goto release;
} else {
wlr_log(L_INFO, "Unknown buffer handle attached");
return;
}
}
uint32_t format = wl_shm_buffer_get_format(buffer);
if (reupload_buffer) {
wlr_texture_upload_shm(surface->texture, format, buffer);
} else {
pixman_region32_t damage = surface->current->buffer_damage;
if (!pixman_region32_not_empty(&damage)) {
goto release;
}
int n;
pixman_box32_t *rects = pixman_region32_rectangles(&damage, &n);
for (int i = 0; i < n; ++i) {
pixman_box32_t rect = rects[i];
if (!wlr_texture_update_shm(surface->texture, format,
rect.x1, rect.y1,
rect.x2 - rect.x1,
rect.y2 - rect.y1,
buffer)) {
break;
}
}
}
release:
pixman_region32_clear(&surface->current->surface_damage);
pixman_region32_clear(&surface->current->buffer_damage);
wlr_surface_state_release_buffer(surface->current);
}
static void wlr_surface_commit_pending(struct wlr_surface *surface) {
int32_t oldw = surface->current->buffer_width;
int32_t oldh = surface->current->buffer_height;
bool null_buffer_commit =
(surface->pending->invalid & WLR_SURFACE_INVALID_BUFFER &&
surface->pending->buffer == NULL);
wlr_surface_move_state(surface, surface->pending, surface->current);
if (null_buffer_commit) {
surface->texture->valid = false;
}
bool reupload_buffer = oldw != surface->current->buffer_width ||
oldh != surface->current->buffer_height;
wlr_surface_flush_damage(surface, reupload_buffer);
// commit subsurface order
struct wlr_subsurface *subsurface;
wl_list_for_each_reverse(subsurface, &surface->subsurface_pending_list,
parent_pending_link) {
wl_list_remove(&subsurface->parent_link);
wl_list_insert(&surface->subsurface_list, &subsurface->parent_link);
if (subsurface->reordered) {
// TODO: damage all the subsurfaces
wlr_surface_damage_subsurfaces(subsurface);
}
}
// TODO: add the invalid bitfield to this callback
wl_signal_emit(&surface->events.commit, surface);
}
static bool wlr_subsurface_is_synchronized(struct wlr_subsurface *subsurface) {
while (subsurface) {
if (subsurface->synchronized) {
return true;
}
if (!subsurface->parent) {
return false;
}
subsurface = subsurface->parent->subsurface;
}
return false;
}
/**
* Recursive function to commit the effectively synchronized children.
*/
static void wlr_subsurface_parent_commit(struct wlr_subsurface *subsurface,
bool synchronized) {
struct wlr_surface *surface = subsurface->surface;
if (synchronized || subsurface->synchronized) {
if (subsurface->has_cache) {
wlr_surface_move_state(surface, subsurface->cached, surface->pending);
wlr_surface_commit_pending(surface);
subsurface->has_cache = false;
subsurface->cached->invalid = 0;
}
struct wlr_subsurface *tmp;
wl_list_for_each(tmp, &surface->subsurface_list, parent_link) {
wlr_subsurface_parent_commit(tmp, true);
}
}
}
static void wlr_subsurface_commit(struct wlr_subsurface *subsurface) {
struct wlr_surface *surface = subsurface->surface;
if (wlr_subsurface_is_synchronized(subsurface)) {
wlr_surface_move_state(surface, surface->pending, subsurface->cached);
subsurface->has_cache = true;
} else {
if (subsurface->has_cache) {
wlr_surface_move_state(surface, subsurface->cached, surface->pending);
wlr_surface_commit_pending(surface);
subsurface->has_cache = false;
} else {
wlr_surface_commit_pending(surface);
}
struct wlr_subsurface *tmp;
wl_list_for_each(tmp, &surface->subsurface_list, parent_link) {
wlr_subsurface_parent_commit(tmp, false);
}
}
}
static void surface_commit(struct wl_client *client,
struct wl_resource *resource) {
struct wlr_surface *surface = wl_resource_get_user_data(resource);
struct wlr_subsurface *subsurface = surface->subsurface;
if (subsurface) {
wlr_subsurface_commit(subsurface);
return;
}
wlr_surface_commit_pending(surface);
struct wlr_subsurface *tmp;
wl_list_for_each(tmp, &surface->subsurface_list, parent_link) {
wlr_subsurface_parent_commit(tmp, false);
}
}
static void surface_set_buffer_transform(struct wl_client *client,
struct wl_resource *resource, int transform) {
struct wlr_surface *surface = wl_resource_get_user_data(resource);
surface->pending->invalid |= WLR_SURFACE_INVALID_TRANSFORM;
surface->pending->transform = transform;
}
static void surface_set_buffer_scale(struct wl_client *client,
struct wl_resource *resource,
int32_t scale) {
struct wlr_surface *surface = wl_resource_get_user_data(resource);
surface->pending->invalid |= WLR_SURFACE_INVALID_SCALE;
surface->pending->scale = scale;
}
static void surface_damage_buffer(struct wl_client *client,
struct wl_resource *resource,
int32_t x, int32_t y, int32_t width,
int32_t height) {
struct wlr_surface *surface = wl_resource_get_user_data(resource);
if (width < 0 || height < 0) {
return;
}
surface->pending->invalid |= WLR_SURFACE_INVALID_BUFFER_DAMAGE;
pixman_region32_union_rect(&surface->pending->buffer_damage,
&surface->pending->buffer_damage,
x, y, width, height);
}
const struct wl_surface_interface surface_interface = {
.destroy = surface_destroy,
.attach = surface_attach,
.damage = surface_damage,
.frame = surface_frame,
.set_opaque_region = surface_set_opaque_region,
.set_input_region = surface_set_input_region,
.commit = surface_commit,
.set_buffer_transform = surface_set_buffer_transform,
.set_buffer_scale = surface_set_buffer_scale,
.damage_buffer = surface_damage_buffer
};
static struct wlr_surface_state *wlr_surface_state_create() {
struct wlr_surface_state *state = calloc(1, sizeof(struct wlr_surface_state));
state->scale = 1;
state->transform = WL_OUTPUT_TRANSFORM_NORMAL;
wl_list_init(&state->frame_callback_list);
pixman_region32_init(&state->surface_damage);
pixman_region32_init(&state->buffer_damage);
pixman_region32_init(&state->opaque);
pixman_region32_init_rect(&state->input,
INT32_MIN, INT32_MIN, UINT32_MAX, UINT32_MAX);
return state;
}
static void wlr_surface_state_destroy(struct wlr_surface_state *state) {
wlr_surface_state_reset_buffer(state);
struct wlr_frame_callback *cb, *tmp;
wl_list_for_each_safe(cb, tmp, &state->frame_callback_list, link) {
wl_resource_destroy(cb->resource);
}
pixman_region32_fini(&state->surface_damage);
pixman_region32_fini(&state->buffer_damage);
pixman_region32_fini(&state->opaque);
pixman_region32_fini(&state->input);
free(state);
}
void wlr_subsurface_destroy(struct wlr_subsurface *subsurface) {
wlr_surface_state_destroy(subsurface->cached);
if (subsurface->parent) {
wl_list_remove(&subsurface->parent_link);
wl_list_remove(&subsurface->parent_pending_link);
wl_list_remove(&subsurface->parent_destroy_listener.link);
}
wl_resource_set_user_data(subsurface->resource, NULL);
if (subsurface->surface) {
subsurface->surface->subsurface = NULL;
}
free(subsurface);
}
static void destroy_surface(struct wl_resource *resource) {
struct wlr_surface *surface = wl_resource_get_user_data(resource);
wl_signal_emit(&surface->events.destroy, surface);
if (surface->subsurface) {
wlr_subsurface_destroy(surface->subsurface);
}
wlr_texture_destroy(surface->texture);
wlr_surface_state_destroy(surface->pending);
wlr_surface_state_destroy(surface->current);
free(surface);
}
struct wlr_surface *wlr_surface_create(struct wl_resource *res,
struct wlr_renderer *renderer) {
struct wlr_surface *surface;
if (!(surface = calloc(1, sizeof(struct wlr_surface)))) {
wl_resource_post_no_memory(res);
return NULL;
}
wlr_log(L_DEBUG, "New wlr_surface %p (res %p)", surface, res);
surface->renderer = renderer;
surface->texture = wlr_render_texture_create(renderer);
surface->resource = res;
surface->current = wlr_surface_state_create();
surface->pending = wlr_surface_state_create();
wl_signal_init(&surface->events.commit);
wl_signal_init(&surface->events.destroy);
wl_list_init(&surface->subsurface_list);
wl_list_init(&surface->subsurface_pending_list);
wl_resource_set_implementation(res, &surface_interface,
surface, destroy_surface);
return surface;
}
void wlr_surface_get_matrix(struct wlr_surface *surface,
float (*matrix)[16],
const float (*projection)[16],
const float (*transform)[16]) {
int width = surface->texture->width / surface->current->scale;
int height = surface->texture->height / surface->current->scale;
float scale[16];
wlr_matrix_identity(matrix);
if (transform) {
wlr_matrix_mul(matrix, transform, matrix);
}
wlr_matrix_scale(&scale, width, height, 1);
wlr_matrix_mul(matrix, &scale, matrix);
wlr_matrix_mul(projection, matrix, matrix);
}
int wlr_surface_set_role(struct wlr_surface *surface, const char *role,
struct wl_resource *error_resource, uint32_t error_code) {
assert(role);
if (surface->role == NULL ||
surface->role == role ||
strcmp(surface->role, role) == 0) {
surface->role = role;
return 0;
}
wl_resource_post_error(error_resource, error_code,
"Cannot assign role %s to wl_surface@%d, already has role %s\n",
role,
wl_resource_get_id(surface->resource),
surface->role);
return -1;
}
static void subsurface_resource_destroy(struct wl_resource *resource) {
struct wlr_subsurface *subsurface = wl_resource_get_user_data(resource);
if (subsurface) {
wlr_subsurface_destroy(subsurface);
}
}
static void subsurface_destroy(struct wl_client *client,
struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static void subsurface_set_position(struct wl_client *client,
struct wl_resource *resource, int32_t x, int32_t y) {
struct wlr_subsurface *subsurface = wl_resource_get_user_data(resource);
struct wlr_surface *surface = subsurface->surface;
surface->pending->invalid |= WLR_SURFACE_INVALID_SUBSURFACE_POSITION;
surface->pending->subsurface_position.x = x;
surface->pending->subsurface_position.y = y;
}
static struct wlr_subsurface *subsurface_find_sibling(
struct wlr_subsurface *subsurface, struct wlr_surface *surface) {
struct wlr_surface *parent = subsurface->parent;
struct wlr_subsurface *sibling;
wl_list_for_each(sibling, &parent->subsurface_list, parent_link) {
if (sibling->surface == surface && sibling != subsurface)
return sibling;
}
return NULL;
}
static void subsurface_place_above(struct wl_client *client,
struct wl_resource *resource, struct wl_resource *sibling_resource) {
struct wlr_subsurface *subsurface = wl_resource_get_user_data(resource);
if (!subsurface) {
return;
}
struct wlr_surface *sibling_surface =
wl_resource_get_user_data(sibling_resource);
struct wlr_subsurface *sibling =
subsurface_find_sibling(subsurface, sibling_surface);
if (!sibling) {
wl_resource_post_error(subsurface->resource,
WL_SUBSURFACE_ERROR_BAD_SURFACE,
"%s: wl_surface@%d is not a parent or sibling",
"place_above", wl_resource_get_id(sibling_surface->resource));
return;
}
wl_list_remove(&subsurface->parent_pending_link);
wl_list_insert(sibling->parent_pending_link.prev,
&subsurface->parent_pending_link);
subsurface->reordered = true;
}
static void subsurface_place_below(struct wl_client *client,
struct wl_resource *resource, struct wl_resource *sibling_resource) {
struct wlr_subsurface *subsurface = wl_resource_get_user_data(resource);
struct wlr_surface *sibling_surface =
wl_resource_get_user_data(sibling_resource);
struct wlr_subsurface *sibling =
subsurface_find_sibling(subsurface, sibling_surface);
if (!sibling) {
wl_resource_post_error(subsurface->resource,
WL_SUBSURFACE_ERROR_BAD_SURFACE,
"%s: wl_surface@%d is not a parent or sibling",
"place_below", wl_resource_get_id(sibling_surface->resource));
return;
}
wl_list_remove(&subsurface->parent_pending_link);
wl_list_insert(&sibling->parent_pending_link,
&subsurface->parent_pending_link);
subsurface->reordered = true;
}
static void subsurface_set_sync(struct wl_client *client,
struct wl_resource *resource) {
struct wlr_subsurface *subsurface = wl_resource_get_user_data(resource);
if (subsurface) {
subsurface->synchronized = true;
}
}
static void subsurface_set_desync(struct wl_client *client,
struct wl_resource *resource) {
struct wlr_subsurface *subsurface = wl_resource_get_user_data(resource);
if (subsurface && subsurface->synchronized) {
subsurface->synchronized = false;
if (!wlr_subsurface_is_synchronized(subsurface)) {
// TODO: do a synchronized commit to flush the cache
wlr_subsurface_parent_commit(subsurface, true);
}
}
}
static const struct wl_subsurface_interface subsurface_implementation = {
.destroy = subsurface_destroy,
.set_position = subsurface_set_position,
.place_above = subsurface_place_above,
.place_below = subsurface_place_below,
.set_sync = subsurface_set_sync,
.set_desync = subsurface_set_desync,
};
static void subsurface_handle_parent_destroy(struct wl_listener *listener,
void *data) {
struct wlr_subsurface *subsurface =
wl_container_of(listener, subsurface, parent_destroy_listener);
wl_list_remove(&subsurface->parent_link);
wl_list_remove(&subsurface->parent_pending_link);
wl_list_remove(&subsurface->parent_destroy_listener.link);
subsurface->parent = NULL;
}
void wlr_surface_make_subsurface(struct wlr_surface *surface,
struct wlr_surface *parent, uint32_t id) {
assert(surface->subsurface == NULL);
struct wlr_subsurface *subsurface =
calloc(1, sizeof(struct wlr_subsurface));
if (!subsurface) {
return;
}
subsurface->cached = wlr_surface_state_create();
subsurface->synchronized = true;
subsurface->surface = surface;
// link parent
subsurface->parent = parent;
wl_signal_add(&parent->events.destroy,
&subsurface->parent_destroy_listener);
subsurface->parent_destroy_listener.notify =
subsurface_handle_parent_destroy;
wl_list_insert(&parent->subsurface_list, &subsurface->parent_link);
wl_list_insert(&parent->subsurface_pending_list,
&subsurface->parent_pending_link);
struct wl_client *client = wl_resource_get_client(surface->resource);
subsurface->resource =
wl_resource_create(client, &wl_subsurface_interface, 1, id);
wl_resource_set_implementation(subsurface->resource,
&subsurface_implementation, subsurface,
subsurface_resource_destroy);
surface->subsurface = subsurface;
}
struct wlr_surface *wlr_surface_get_main_surface(struct wlr_surface *surface) {
struct wlr_subsurface *sub;
while (surface && (sub = surface->subsurface)) {
surface = sub->parent;
}
return surface;
}
struct wlr_subsurface *wlr_surface_subsurface_at(struct wlr_surface *surface,
double sx, double sy, double *sub_x, double *sub_y) {
struct wlr_subsurface *subsurface;
wl_list_for_each(subsurface, &surface->subsurface_list, parent_link) {
double _sub_x = subsurface->surface->current->subsurface_position.x;
double _sub_y = subsurface->surface->current->subsurface_position.y;
struct wlr_subsurface *sub =
wlr_surface_subsurface_at(subsurface->surface, _sub_x + sx,
_sub_y + sy, sub_x, sub_y);
if (sub) {
// TODO: This won't work for nested subsurfaces. Convert sub_x and
// sub_y to the parent coordinate system
return sub;
}
int sub_width = subsurface->surface->current->buffer_width;
int sub_height = subsurface->surface->current->buffer_height;
if ((sx > _sub_x && sx < _sub_x + sub_width) &&
(sy > _sub_y && sy < _sub_y + sub_height)) {
if (pixman_region32_contains_point(
&subsurface->surface->current->input,
sx - _sub_x, sy - _sub_y, NULL)) {
*sub_x = _sub_x;
*sub_y = _sub_y;
return subsurface;
}
}
}
return NULL;
}