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backend/multi: disallow multiple renderers at the same time

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This commit is contained in:
emersion 2018-05-15 22:08:08 +01:00
parent a1631dd9ee
commit 52bd8aa716
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GPG key ID: 0FDE7BE0E88F5E48
2 changed files with 16 additions and 6 deletions
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20
backend/multi/backend.c
View file

@ -130,20 +130,29 @@ static struct subbackend_state *multi_backend_get_subbackend(struct wlr_multi_ba
return NULL;
}
void wlr_multi_backend_add(struct wlr_backend *_multi,
bool wlr_multi_backend_add(struct wlr_backend *_multi,
struct wlr_backend *backend) {
assert(wlr_backend_is_multi(_multi));
struct wlr_multi_backend *multi = (struct wlr_multi_backend *)_multi;
if (multi_backend_get_subbackend(multi, backend)) {
// already added
return;
return true;
}
struct subbackend_state *sub;
if (!(sub = calloc(1, sizeof(struct subbackend_state)))) {
struct wlr_renderer *multi_renderer =
multi_backend_get_renderer(&multi->backend);
struct wlr_renderer *backend_renderer = wlr_backend_get_renderer(backend);
if (multi_renderer != NULL && backend_renderer != NULL) {
wlr_log(L_ERROR, "Could not add backend: multiple renderers at the "
"same time aren't supported");
return false;
}
struct subbackend_state *sub = calloc(1, sizeof(struct subbackend_state));
if (sub == NULL) {
wlr_log(L_ERROR, "Could not add backend: allocation failed");
return;
return false;
}
wl_list_insert(&multi->backends, &sub->link);
@ -160,6 +169,7 @@ void wlr_multi_backend_add(struct wlr_backend *_multi,
sub->new_output.notify = new_output_reemit;
wlr_signal_emit_safe(&multi->events.backend_add, backend);
return true;
}
void wlr_multi_backend_remove(struct wlr_backend *_multi,

2
include/wlr/backend/multi.h
View file

@ -13,7 +13,7 @@ struct wlr_backend *wlr_multi_backend_create(struct wl_display *display);
* Adds the given backend to the multi backend. This should be done before the
* new backend is started.
*/
void wlr_multi_backend_add(struct wlr_backend *multi,
bool wlr_multi_backend_add(struct wlr_backend *multi,
struct wlr_backend *backend);
void wlr_multi_backend_remove(struct wlr_backend *multi,