static struct wsi_x11_connection *
wsi_x11_connection_create(const VkAllocationCallbacks *alloc,
xcb_connection_t *conn)
{
xcb_query_extension_cookie_t dri3_cookie, pres_cookie;
xcb_query_extension_reply_t *dri3_reply, *pres_reply;
struct wsi_x11_connection *wsi_conn =
vk_alloc(alloc, sizeof(*wsi_conn), 8,
VK_SYSTEM_ALLOCATION_SCOPE_INSTANCE);
if (!wsi_conn)
return NULL;
dri3_cookie = xcb_query_extension(conn, 4, "DRI3");
pres_cookie = xcb_query_extension(conn, 7, "PRESENT");
dri3_reply = xcb_query_extension_reply(conn, dri3_cookie, NULL);
pres_reply = xcb_query_extension_reply(conn, pres_cookie, NULL);
if (dri3_reply == NULL || pres_reply == NULL) {
free(dri3_reply);
free(pres_reply);
vk_free(alloc, wsi_conn);
return NULL;
}
wsi_conn->has_dri3 = dri3_reply->present != 0;
wsi_conn->has_present = pres_reply->present != 0;
free(dri3_reply);
free(pres_reply);
return wsi_conn;
}
ExcCode screen_shm_init() {
xcb_query_extension_cookie_t extension_cookie =
xcb_query_extension(display,
strlen(MIT_SHM_EXTENSION_NAME), MIT_SHM_EXTENSION_NAME);
xcb_query_extension_reply_t *extension_reply =
xcb_query_extension_reply(display, extension_cookie, NULL);
if (extension_reply == NULL)
PANIC(ERR_X_EXTENSION, MIT_SHM_EXTENSION_NAME);
free(extension_reply);
xcb_shm_query_version_cookie_t version_cookie =
xcb_shm_query_version(display);
xcb_shm_query_version_reply_t *version_reply =
xcb_shm_query_version_reply(display, version_cookie, NULL);
if (version_reply == NULL)
PANIC(ERR_X_EXTENSION, MIT_SHM_EXTENSION_NAME);
free(version_reply);
size_t max_size = screen->width_in_pixels * screen->height_in_pixels *
sizeof (unsigned);
shmid = shmget(IPC_PRIVATE, max_size, IPC_CREAT | 0777);
if (shmid < 0)
PANIC(ERR_SHM_ALLOC);
shmaddr = shmat(shmid, 0, 0);
if (shmaddr == (uint8_t *) -1)
PANIC(ERR_SHM_ATTACH);
shmseg = xcb_generate_id(display);
xcb_void_cookie_t attach_cookie = xcb_shm_attach_checked(display,
shmseg, shmid, 0);
if (xcb_request_check(display, attach_cookie) != NULL)
PANIC(ERR_SHM_ATTACH);
return 0;
}
/* Do not free the returned xcb_query_extension_reply_t - on return, it's aliased
* from the cache. */
const xcb_query_extension_reply_t *xcb_get_extension_data(xcb_connection_t *c, xcb_extension_t *ext)
{
lazyreply *data;
if(c->has_error)
return 0;
pthread_mutex_lock(&c->ext.lock);
data = get_lazyreply(c, ext);
if(data && data->tag == LAZY_COOKIE)
{
data->tag = LAZY_FORCED;
data->value.reply = xcb_query_extension_reply(c, data->value.cookie, 0);
}
pthread_mutex_unlock(&c->ext.lock);
return data ? data->value.reply : 0;
}
ExcCode screen_cursor_init() {
xcb_query_extension_cookie_t extension_cookie =
xcb_query_extension(display,
strlen(XFIXES_EXTENSION_NAME), XFIXES_EXTENSION_NAME);
xcb_query_extension_reply_t *extension_reply =
xcb_query_extension_reply(display, extension_cookie, NULL);
if (extension_reply == NULL)
PANIC(ERR_X_EXTENSION, XFIXES_EXTENSION_NAME);
free(extension_reply);
xcb_xfixes_query_version_cookie_t version_cookie =
xcb_xfixes_query_version(display,
XCB_XFIXES_MAJOR_VERSION, XCB_XFIXES_MINOR_VERSION);
xcb_xfixes_query_version_reply_t *version_reply =
xcb_xfixes_query_version_reply(display, version_cookie, NULL);
if (version_reply == NULL)
PANIC(ERR_X_EXTENSION, XFIXES_EXTENSION_NAME);
free(version_reply);
return 0;
}
